Patent Application
20230403708
The examples and non-limiting embodiments relate generally to communications and, more particularly, to PDCCH-based adaptation of uplink activity.
It is known to implement power saving techniques within a wireless network.
The foregoing aspects and other features are explained in the following description, taken in connection with the accompanying drawings, where:
The following acronyms and abbreviations that may be found in the specification and/or the drawing figures are defined as follows:
Turning to
The RAN node 170 in this example is a base station that provides access by wireless devices such as the UE 110 to the wireless network 100. The RAN node 170 may be, for example, a base station for 5G, also called New Radio (NR). In 5G, the RAN node 170 may be a NG-RAN node, which is defined as either a gNB or an ng-eNB. A gNB is a node providing NR user plane and control plane protocol terminations towards the UE, and connected via the NG interface to a 5GC (such as, for example, the network element(s) 190). The ng-eNB is a node providing E-UTRA user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC. The NG-RAN node may include multiple gNBs, which may also include a central unit (CU) (gNB-CU) 196 and distributed unit(s) (DUs) (gNB-DUs), of which DU 195 is shown. Note that the DU 195 may include or be coupled to and control a radio unit (RU). The gNB-CU 196 is a logical node hosting radio resource control (RRC), SDAP and PDCP protocols of the gNB or RRC and PDCP protocols of the en-gNB that controls the operation of one or more gNB-DUs. The gNB-CU 196 terminates the F1 interface connected with the gNB-DU 195. The F1 interface is illustrated as reference 198, although reference 198 also illustrates a link between remote elements of the RAN node 170 and centralized elements of the RAN node 170, such as between the gNB-CU 196 and the gNB-DU 195. The gNB-DU 195 is a logical node hosting RLC, MAC and PHY layers of the gNB or en-gNB, and its operation is partly controlled by gNB-CU 196. One gNB-CU 196 supports one or multiple cells. One cell is supported by only one gNB-DU 195. The gNB-DU 195 terminates the F1 interface 198 connected with the gNB-CU 196. Note that the DU 195 is considered to include the transceiver 160, e.g., as part of a RU, but some examples of this may have the transceiver 160 as part of a separate RU, e.g., under control of and connected to the DU 195. The RAN node 170 may also be an eNB (evolved NodeB) base station, for LTE (long term evolution), or any other suitable base station or node.
The RAN node 170 includes one or more processors 152, one or more memories 155, one or more network interfaces (N/W I/F(s)) 161, and one or more transceivers 160 interconnected through one or more buses 157. Each of the one or more transceivers 160 includes a receiver, Rx, 162 and a transmitter, Tx, 163. The one or more transceivers 160 are connected to one or more antennas 158. The one or more memories 155 include computer program code 153. The CU 196 may include the processor(s) 152, memory(ies) 155, and network interfaces 161. Note that the DU 195 may also contain its own memory/memories and processor(s), and/or other hardware, but these are not shown.
The RAN node 170 includes a module 150, comprising one of or both parts 150-1 and/or 150-2, which may be implemented in a number of ways. The module 150 may be implemented in hardware as module 150-1, such as being implemented as part of the one or more processors 152. The module 150-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array. In another example, the module 150 may be implemented as module 150-2, which is implemented as computer program code 153 and is executed by the one or more processors 152. For instance, the one or more memories 155 and the computer program code 153 are configured to, with the one or more processors 152, cause the RAN node 170 to perform one or more of the operations as described herein. Note that the functionality of the module 150 may be distributed, such as being distributed between the DU 195 and the CU 196, or be implemented solely in the DU 195. The modules 150-1 and 150-2 may be configured to implement the functionality of the base station described herein. Such functionality of the base station may include a location management function (LMF) implemented based on functionality of the LMF described herein. Such LMF may also be implemented within the RAN node 170 as a location management component (LMC).
The one or more network interfaces 161 communicate over a network such as via the links 176 and 131. Two or more gNBs 170 may communicate using, e.g., link 176. The link 176 may be wired or wireless or both and may implement, for example, an Xn interface for 5G, an X2 interface for LTE, or other suitable interface for other standards.
The one or more buses 157 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, wireless channels, and the like. For example, the one or more transceivers 160 may be implemented as a remote radio head (RRH) 195 for LTE or a distributed unit (DU) 195 for gNB implementation for 5G, with the other elements of the RAN node 170 possibly being physically in a different location from the RRH/DU 195, and the one or more buses 157 could be implemented in part as, for example, fiber optic cable or other suitable network connection to connect the other elements (e.g., a central unit (CU), gNB-CU 196) of the RAN node 170 to the RRH/DU 195. Reference 198 also indicates those suitable network link(s).
It is noted that description herein indicates that “cells” perform functions, but it should be clear that equipment which forms the cell may perform the functions. The cell makes up part of a base station. That is, there can be multiple cells per base station. For example, there could be three cells for a single carrier frequency and associated bandwidth, each cell covering one-third of a 360 degree area so that the single base station's coverage area covers an approximate oval or circle. Furthermore, each cell can correspond to a single carrier and a base station may use multiple carriers. So if there are three 120 degree cells per carrier and two carriers, then the base station has a total of 6 cells.
The wireless network 100 may include a network element or elements 190 that may include core network functionality, and which provides connectivity via a link or links 181 with a further network, such as a telephone network and/or a data communications network (e.g., the Internet). Such core network functionality for 5G may include location management functions (LMF(s)) and/or access and mobility management function(s) (AMF(S)) and/or user plane functions (UPF(s)) and/or session management function(s) (SMF(s)). Such core network functionality for LTE may include MME (Mobility Management Entity)/SGW (Serving Gateway) functionality. These are merely example functions that may be supported by the network element(s) 190, and note that both 5G and LTE functions might be supported. The RAN node 170 is coupled via a link 131 to the network element 190. The link 131 may be implemented as, e.g., an NG interface for 5G, or an S1 interface for LTE, or other suitable interface for other standards. The network element 190 includes one or more processors 175, one or more memories 171, and one or more network interfaces (N/W I/F(s)) 180, interconnected through one or more buses 185. The one or more memories 171 include computer program code 173. The one or more memories 171 and the computer program code 173 are configured to, with the one or more processors 175, cause the network element 190 to perform one or more operations such as functionality of an LMF as described herein. In some examples, a single LMF could serve a large region covered by hundreds of base stations.
The wireless network 100 may implement network virtualization, which is the process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network. Network virtualization involves platform virtualization, often combined with resource virtualization. Network virtualization is categorized as either external, combining many networks, or parts of networks, into a virtual unit, or internal, providing network-like functionality to software containers on a single system. Note that the virtualized entities that result from the network virtualization are still implemented, at some level, using hardware such as processors 152 or 175 and memories 155 and 171, and also such virtualized entities create technical effects.
The computer readable memories 125, 155, and 171 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory. The computer readable memories 125, 155, and 171 may be means for performing storage functions. The processors 120, 152, and 175 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on a multi-core processor architecture, as non-limiting examples. The processors 120, 152, and 175 may be means for performing functions, such as controlling the UE 110, RAN node 170, network element(s) 190, and other functions as described herein.
In general, the various embodiments of the user equipment 110 can include, but are not limited to, cellular telephones such as smart phones, tablets, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, tablets with wireless communication capabilities, as well as portable units or terminals that incorporate combinations of such functions.
UE 110, RAN node 170 and/or network element(s) 190 (and associated memories, computer program code and modules) may be configured to implement PDCCH-based adaptation of uplink activity, based on the examples described herein. Thus, computer program code 123, module 140-1, module 140-2, and other elements/features shown in
In 3GPP Rel-17 there is a work item targeting NR UE power saving (RP-200938). Objective 2a) of the WID targets power saving within the DRX Active Time:
According to TS 38.321 the Active Time includes:
In 3GPP Rel-16, NR UE power saving was also studied and specified, but as is evident from Technical Report 38.840, the focus was solely on optimizing downlink-related procedures, such as reducing PDCCH monitoring. However, the UE power consumption model, developed as part of the Rel-16 work does define the power consumed for uplink actions. Selected components of the model are provided in Table 1 and as is evident, the power consumed due to uplink activity is on par with or exceeds the PDCCH-only monitoring.
The problem addressed by the examples described herein is how the UE can adapt uplink activity for UE power saving, based on the ongoing Rel-17 work focused on PDCCH actions.
A NR UE can be configured to measure downlink Channel State Information (CSI) Reference Signals (CSI-RS) and report the result(s) to the network. The reporting is based on the CSI-ReportConfig (TS 38.331)—refer to 301 of
The NR specification supports different kinds of CSI reporting setting combinations for time-domain behavior together with the resource setting and with associated triggering mechanisms, if any.
The more dynamic reporting mechanisms are the semi-persistent CSI and aperiodic CSI reporting, which may be activated/triggered with DCI and adjusted with MAC-CE. The semi-persistent CSI reporting on PUCCH (refer e.g. to 304) can be activated/deactivated using the “SP CSI reporting on PUCCH Activation/Deactivation MAC CE”, but this ON/OFF effect is prone to UE and gNB ambiguity. Furthermore, the CSI trigger state for the aperiodic CSI (refer e.g. to 308) can be selected using the “Aperiodic CSI Trigger State Subselection MAC CE” (TS 38.321).
In addition to the downlink-based CSI report, the UE may also transmit Sounding Reference Signals (SRS) in uplink enabling CSI estimation at gNB. The SRS is used mainly for uplink scheduling by the network and is configured using the IE SRS-Config in TS 38.331. The SRS may be used by the gNB to facilitate scheduling in downlink as well. Similar to the CSI report, the SRS can be aperiodic, periodic, and semi-persistent. The transmission is configured for a set of resources in the time-frequency domain (with a certain periodicity and offset in time for the periodic and semi-persistent transmissions).
The examples as described herein include adapting UE uplink activity based on downlink signaling related to PDCCH monitoring as part of the Rel-17 work item on UE power saving.
The proposed adaptation method based on PDCCH includes a UE being configured with a periodic PUCCH for reporting CSI and/or SRS with a first periodicity, and a UE determining the UE being allowed to drop one or more configured PUCCH transmissions or SRS transmissions based on at least one of conditions A or B.
Condition A as disclosed herein involves the UE receiving a command to stop or pause (e.g. x ms, where x is a variable) downlink periodic CSI measurements and the related uplink reporting. This may be linked to PDCCH monitoring skipping (another feature being discussed for objective 2a of the UE power saving WI).
Thus, condition A as disclosed herein involves an explicit indication via DCI to pause CSI reporting or SRS transmission. However, condition A as disclosed herein also involves an implicit indication based on a PDCCH monitoring skipping indication. The idea is that the UL reporting/transmission is paused for a duration that is associated to a PDCCH monitoring skipping period. The pause can be equal to the skipping period or a function based on the skipping period and/or other network configuration, e.g. pause min(PDCCH skipping period, x) ms where x is provided by the network through other means. Therefore, condition A may be adjusted to be directly linked to the PDCCH monitoring skipping DCI (i.e. implicit signaling), and not necessarily the general scheme of using a specific DCI explicitly indicating to pause CSI reporting/SRS transmission.
Condition B involves the UE determining that a second periodicity is active for reporting. This may involve where one or more of second periodicities, that is, a longer reporting period or a longer sounding reference signal transmission period, may be preconfigured. This may also involve the UE determining that the second periodicity is applicable based on at least one of: (i) when a periodicity comprising an extended or prolonged period is indicated by a DCI, (ii) when n consecutive measured CSI reports (based on first periodicity) are the same, (iii) when the UE does not receive DCI scrambled with C-RNTI for yn ms, when a first predefined SearchSpace group is active, or when a first predefined minimum K0,min for downlink and/or a K2,min for uplink is active. This may also involve the UE determining that a first periodicity is applicable based on at least one of: (i) when the UE receives DCI scrambled with C-RNTI, (ii) when a second predefined SearchSpace group is active, or (iii) when a second predefined minimum K0,min for downlink and/or a K2,min for uplink is active. A longer channel measurement period may also be configured or preconfigured. In some examples, a periodicity, for example an indicated second periodicity, may comprise a reduction of channel state information reporting, sounding reference signal transmitting, or channel state information measuring (e.g. relative to a previously active periodicity).
As a further embodiment, the UE reports CSI irrespective of the currently used CSI reporting periodicity if the UE would multiplex CSI together with HARQ-ACK according to the default first periodicity.
As a further embodiment, the UE, when using the second periodicity, may continue measuring CSI corresponding to the first periodicity and report the CSI if the prepared CSI report differs from the previous transmitted CSI report. Transmission may use a resource configured for the first periodicity.
Details are provided herein for the different variants, referring to conditions A and B as described.
Explicit Indication Details as Shown by
Regarding condition A (as shown by
Thus, as shown in
Regarding condition B (as shown by
In an embodiment, “semi-aperiodic CSI reporting” may be configured and indicated to the UE 110 (e.g. at 510) such that: the UE 110 measures e.g. at 518 the channel at a first indicated periodicity; the UE 110 reports the CSI report e.g. at 522 when it differs from the previously transmitted CSI report. Otherwise the UE 110 reports e.g. at 522 the CSI report according to a second indicated periodicity, where the second periodicity is integer multiple of first periodicity; two CSI reports are regarded to differ if the value(s) of any of the reported CSI components (rank indicator, precoding matrix indicator, etc.) have a different value. Alternatively, two CSI reports are regarded to differ if the value of a predetermined CSI component has a different value. In the case of channel quality information (CQI) or reference signal received power (RSRP), the CSI reports are considered to differ if the CQI or RSRP values differ at least k values, where k is predetermined or configured. The “semi-aperiodic CSI reporting” embodiment may be used when gNB 170 detects or the UE 110 indicates a quasi-stationarity of the channel. This may be used together with network configured UE power saving, e.g. when the UE detects that low mobility conditions are fulfilled.
Further regarding condition B, in an example, configured periodicities are integer multiples of the shortest periodicity. In another example, UL resources are configured corresponding to the shortest periodicity. When the UE 110 applies a longer periodicity, it uses a subset of the configured UL resources according to the used periodicity and the configured offset.
Thus, in the example shown by
The above adaptation of the periodic UL transmissions (both SRS and UL CSI reports) could be indicated using separate or joint signaling, and the indication would potentially be applied through timed disabling (configured duration as mentioned above, indicated duration from a set of values), or through an explicit indication that the periodic UL transmissions should fall back to a configured baseline operation.
Implicit Indication Details as Shown by
Regarding condition A (as shown by the example signaling of
Thus, in the example shown by
Regarding condition B (as shown by the example signaling of
Thus,
Currently, in NR it is not possible to link the skipping of periodic reporting to activation of uplink or downlink SP-SS, as search space (SS) sets cover both UL and DL. The adaptation methods as herein described do not propose to completely drop UL or DL to control the pausing of CSI reports, but instead toggle the DL and UL monitoring periodicity by changing SS sets. When the SS sets are switched this then implicitly leads to adjusting the CSI reporting periodicity (and/or SRS transmission).
Further regarding condition B, if the UE is configured with a minimum scheduling offset restriction (such as K0,min for downlink, K2,min for uplink), each minimum scheduling offset configuration may also be associated with different uplink activity configurations, for example CSI reporting periodicity or CSI resource periodicity.
Regarding condition B (as shown by the example signaling within
Thus, in
An additional condition for dropping CSI or SRS transmission is herein described. As a further embodiment, the UE reports CSI irrespective of the currently used CSI reporting periodicity if the UE would multiplex CSI together with HARQ-ACK according to the default periodicity. If the HARQ feedback delay from the scheduling PDCCH is shorter than the CSI computation time, the UE can report CSI without updating it. This embodiment avoids ambiguity (e.g. in the PUCCH resource) in HARQ-ACK reporting due to one or more discrepancies in the used CSI reporting periodicity between the UE and gNB.
The indication for the temporary change of UL activity periodicity (or explicitly turning off activity) could be carried on the DCP (DCI with CRC scrambled with PS-RNTI) read by the UE outside of active time, where the UE would be configured with specific bit fields in the message to indicate the specific UE operation (e.g. changing/adapting SRS and/or CSI measurement/reporting). Alternatively, the indication could be provided through the normal scheduling DCI with an extension to include the related information. In one embodiment of the examples described herein, a UE is configured to utilize the special bits in the DCI format 0_2 to provide such adaptation information as part of the information content in the configurable bit fields for the SRS request (currently 0, 1, 2 or 3 bits), and/or in the CSI request (currently 0, 1, 2, 3, 4, 5 or 6 bits). Correspondingly, the SRS request field of the DCI format 12 (for DL scheduling) could be used/configured to carry the needed information.
An advantage and technical effect of the examples described herein is the power saving due to less uplink activity. In some instances the UE may also stop/pause CSI downlink measurements and thus save further energy. In addition, due to the potential UE power saving, the uplink interference is also reduced if certain uplink transmissions are not performed. Further, the presented solutions have low signaling overhead as well as low ambiguity time compared e.g. to MAC CE.
The apparatus 900 may be UE 110, RAN node 170, or network element(s) 190. Thus, processor 902 may correspond respectively to processor(s) 120, processor(s) 152, or processor(s) 175, memory 904 may correspond respectively to memory(ies) 125, memory(ies) 155, or memory(ies) 171, computer program code 905 may correspond respectively to computer program code 123, module 140-1, module 140-2, computer program code 153, module 150-1, module 150-2, or computer program code 173, and N/W I/F(s) 910 may correspond respectively to N/W I/F(s) 161 or N/W I/F(s) 180. Alternatively, apparatus 900 may not correspond to either of UE 110, RAN node 170, or network element(s) 190 (for example, apparatus 900 may be a remote, virtual or cloud apparatus).
References to a ‘computer’, ‘processor’, etc. should be understood to encompass not only computers having different architectures such as single/multi-processor architectures and sequential (Von Neumann)/parallel architectures but also specialized circuits such as field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), signal processing devices and other processing circuitry. References to computer program, instructions, code etc. should be understood to encompass software for a programmable processor or firmware such as, for example, the programmable content of a hardware device whether instructions for a processor, or configuration settings for a fixed-function device, gate array or programmable logic device etc.
The memory(ies) as described herein may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory. The memory(ies) may comprise a database for storing data.
As used herein, the term ‘circuitry’ may refer to the following: (a) hardware circuit implementations, such as implementations in analog and/or digital circuitry, and (b) combinations of circuits and software (and/or firmware), such as (as applicable): (i) a combination of processor(s) or (ii) portions of processor(s)/software including digital signal processor(s), software, and memory(ies) that work together to cause an apparatus to perform various functions, and (c) circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present. As a further example, as used herein, the term ‘circuitry’ would also cover an implementation of merely a processor (or multiple processors) or a portion of a processor and its (or their) accompanying software and/or firmware. The term ‘circuitry’ would also cover, for example and if applicable to the particular element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in a server, a cellular network device, or another network device.
An example method includes receiving a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; and determining whether to stop or pause at least one of the reporting of the channel state information, or the transmitting of the sounding reference signal, based on at least one of: receiving a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or determining that at least one second periodicity is active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
Other aspects of the method may include the following. The method may further include determining whether to stop or pause measuring of channel state information based on at least one of: receiving a command to stop or pause the measuring of the channel state information; or determining that the at least one second periodicity is active for performing the measuring of the channel state information. The command to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may comprise a command to skip monitoring of a downlink control channel. Whether to stop or pause the channel state information reporting, the channel state information measurement, or the sounding reference signal transmitting may depend further on a duration of the downlink control channel monitoring skipping. A time duration to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may be dependent on the duration of the downlink control channel monitoring skipping. The method may further include changing to the first periodicity or the second periodicity in response to not receiving information or a command over a physical downlink control channel for a predetermined amount of time. The method may further include determining that the at least one second periodicity is active based on the second periodicity being indicated by downlink control information. The at least one second periodicity may comprise an extended or prolonged period relative to a period of a previously active periodicity, to reduce a frequency of the reporting of the channel state information, the transmitting of the sounding reference signal, or the measuring of the channel state information. The method may further include determining that the first periodicity is active in response to receiving downlink control information scrambled with a cell radio network temporary identifier; and determining that the at least one second periodicity is active in response to not receiving the downlink control information scrambled with the cell radio network temporary identifier for a predetermined amount of time. The method may further include determining that the first periodicity is active in response to a first predefined search space group being active and/or indicated to be active; and determining that the at least one second periodicity is active in response to a second predefined search space group being active and/or indicated to be active. The method may further include determining that the first periodicity is active in response to a first predefined minimum scheduling offset restriction for uplink or downlink being active and/or indicated to be active; and determining that the at least one second periodicity is active in response to a second predefined minimum scheduling offset restriction for uplink or downlink being active and/or indicated to be active. The method may further include determining that the at least one second periodicity is active in response to a plurality of consecutive channel state information values based on the first periodicity being the same or within a predetermined variation. The method may further include reporting the channel state information irrespective of a currently used reporting periodicity while multiplexing channel state information together with a hybrid automatic repeat request acknowledgement based on the first periodicity. The method may further include, when using the at least one second periodicity, continuing to measure the channel state information based on the first periodicity and, in response to a value of the channel state information differing from a previously reported channel state information value, reporting the channel state information based on the first periodicity, otherwise reporting the channel state information based on the at least one second periodicity. The method may further include resuming the reporting of the channel state information, the transmitting of the sounding reference signal, or the measuring of the channel state information.
An example method includes providing a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; where the reporting of the channel state information, or the transmitting of the sounding reference signal is stopped or paused based on at least one of: providing a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or at least one second periodicity being active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
Other aspects of the method may include the following. Measuring of the channel state information may be stopped or paused based on at least one of: providing a command to stop or pause the measuring of the channel state information; or the at least one second periodicity being active for performing the measuring of the channel state information. The command to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may comprise a command to skip monitoring of a downlink control channel. Whether to stop or pause the channel state information reporting, the channel state information measurement, or the sounding reference signal transmitting may depend further on a duration of the downlink control channel monitoring skipping. A time duration to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may be dependent on the duration of the downlink control channel monitoring skipping. The method may further include not providing information or a command over a physical downlink control channel for a predetermined amount of time; where the first periodicity is changed to being active, or the second periodicity is changed to being active in response to the not providing of the information or the command over the physical downlink control channel for the predetermined amount of time. The method may further include providing downlink control information to activate the at least one second periodicity. The at least one second periodicity may comprise an extended or prolonged period relative to a period of a previously active periodicity, to reduce a frequency of the reporting of the channel state information, the transmitting of the sounding reference signal, or the measuring of the channel state information. The method may further include activating the first periodicity through providing downlink control information scrambled with a cell radio network temporary identifier; and activating the at least one second periodicity through not providing the downlink control information scrambled with the cell radio network temporary identifier for a predetermined amount of time. The method may further include activating the first periodicity through activation of a first predefined search space group; and activating the at least one second periodicity through activation of a second predefined search space group. The method may further include activating the first periodicity through activation of a first predefined minimum scheduling offset restriction for uplink or downlink; and activating the at least one second periodicity through activation of a second predefined minimum scheduling offset restriction for uplink or downlink. The at least one second periodicity may be active in response to detection failure for a plurality of consecutive channel state information reports based on the first periodicity. The method may further include receiving the channel state information irrespective of a currently used reporting periodicity when the channel state information is multiplexed together with a hybrid automatic repeat request acknowledgement based on the first periodicity. The method may further include, when the at least one second periodicity is used, receiving reporting of the channel state information based on the first periodicity, in response to a value of the channel state information differing from a previously reported channel state information value, otherwise receiving reporting of the channel state information based on the at least one second periodicity.
An example apparatus includes at least one processor; and at least one non-transitory memory including computer program code; where the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform: receive a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; and determine whether to stop or pause at least one of the reporting of the channel state information, or the transmitting of the sounding reference signal, based on at least one of: receiving a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or determining that at least one second periodicity is active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
Other aspects of the apparatus may include the following. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: determine whether to stop or pause measuring of channel state information based on at least one of: receiving a command to stop or pause the measuring of the channel state information; or determining that the at least one second periodicity is active for performing the measuring of the channel state information. The command to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may comprise a command to skip monitoring of a downlink control channel. Whether to stop or pause the channel state information reporting, the channel state information measurement, or the sounding reference signal transmitting may depend further on a duration of the downlink control channel monitoring skipping. A time duration to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may be dependent on the duration of the downlink control channel monitoring skipping. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: change to the first periodicity or the second periodicity in response to not receiving information or a command over a physical downlink control channel for a predetermined amount of time. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: determine that the at least one second periodicity is active based on the second periodicity being indicated by downlink control information. The at least one second periodicity may comprise an extended or prolonged period relative to a period of a previously active periodicity, to reduce a frequency of the reporting of the channel state information, the transmitting of the sounding reference signal, or the measuring of the channel state information. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: determine that the first periodicity is active in response to receiving downlink control information scrambled with a cell radio network temporary identifier; and determine that the at least one second periodicity is active in response to not receiving the downlink control information scrambled with the cell radio network temporary identifier for a predetermined amount of time. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: determine that the first periodicity is active in response to a first predefined search space group being active and/or indicated to be active; and determine that the at least one second periodicity is active in response to a second predefined search space group being active and/or indicated to be active. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: determine that the first periodicity is active in response to a first predefined minimum scheduling offset restriction for uplink or downlink being active and/or indicated to be active; and determine that the at least one second periodicity is active in response to a second predefined minimum scheduling offset restriction for uplink or downlink being active and/or indicated to be active. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: determine that the at least one second periodicity is active in response to a plurality of consecutive channel state information values based on the first periodicity being the same or within a predetermined variation. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: report the channel state information irrespective of a currently used reporting periodicity while multiplexing channel state information together with a hybrid automatic repeat request acknowledgement based on the first periodicity. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: when using the at least one second periodicity, continue to measure the channel state information based on the first periodicity and, in response to a value of the channel state information differing from a previously reported channel state information value, report the channel state information based on the first periodicity, otherwise report the channel state information based on the at least one second periodicity.
An example apparatus includes at least one processor; and at least one non-transitory memory including computer program code; where the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform: provide a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; where the reporting of the channel state information, or the transmitting of the sounding reference signal is stopped or paused based on at least one of: providing a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or at least one second periodicity being active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
Other aspects of the apparatus may include the following. Measuring of the channel state information may be stopped or paused based on at least one of: providing a command to stop or pause the measuring of the channel state information; or the at least one second periodicity being active for performing the measuring of the channel state information. The command to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may comprise a command to skip monitoring of a downlink control channel. Whether to stop or pause the channel state information reporting, the channel state information measurement, or the sounding reference signal transmitting may depend further on a duration of the downlink control channel monitoring skipping. A time duration to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may be dependent on the duration of the downlink control channel monitoring skipping. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: not provide information or a command over a physical downlink control channel for a predetermined amount of time; where the first periodicity is changed to being active, or the second periodicity is changed to being active in response to the not providing of the information or the command over the physical downlink control channel for the predetermined amount of time. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: provide downlink control information to activate the at least one second periodicity. The at least one second periodicity may comprise an extended or prolonged period relative to a period of a previously active periodicity, to reduce a frequency of the reporting of the channel state information, the transmitting of the sounding reference signal, or the measuring of the channel state information. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: activate the first periodicity through providing downlink control information scrambled with a cell radio network temporary identifier; and activate the at least one second periodicity through not providing the downlink control information scrambled with the cell radio network temporary identifier for a predetermined amount of time. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: activate the first periodicity through activation of a first predefined search space group; and activate the at least one second periodicity through activation of a second predefined search space group. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: activate the first periodicity through activation of a first predefined minimum scheduling offset restriction for uplink or downlink; and activate the at least one second periodicity through activation of a second predefined minimum scheduling offset restriction for uplink or downlink. The at least one second periodicity may be active in response to detection failure for a plurality of consecutive channel state information reports based on the first periodicity. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: receive the channel state information irrespective of a currently used reporting periodicity when the channel state information is multiplexed together with a hybrid automatic repeat request acknowledgement based on the first periodicity. The at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus at least to perform: when the at least one second periodicity is used, receive reporting of the channel state information based on the first periodicity, in response to a value of the channel state information differing from a previously reported channel state information value, otherwise receive reporting of the channel state information based on the at least one second periodicity.
An example apparatus includes means for receiving a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; and means for determining whether to stop or pause at least one of the reporting of the channel state information, or the transmitting of the sounding reference signal, based on at least one of: receiving a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or determining that at least one second periodicity is active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
Other aspects of the apparatus may include the following. The apparatus may further include means for determining whether to stop or pause measuring of channel state information based on at least one of: receiving a command to stop or pause the measuring of the channel state information; or determining that the at least one second periodicity is active for performing the measuring of the channel state information. The command to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may comprise a command to skip monitoring of a downlink control channel. Whether to stop or pause the channel state information reporting, the channel state information measurement, or the sounding reference signal transmitting may depend further on a duration of the downlink control channel monitoring skipping. A time duration to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may be dependent on the duration of the downlink control channel monitoring skipping. The apparatus may further include means for changing to the first periodicity or the second periodicity in response to not receiving information or a command over a physical downlink control channel for a predetermined amount of time. The apparatus may further include means for determining that the at least one second periodicity is active based on the second periodicity being indicated by downlink control information. The at least one second periodicity may comprise an extended or prolonged period relative to a period of a previously active periodicity, to reduce a frequency of the reporting of the channel state information, the transmitting of the sounding reference signal, or the measuring of the channel state information. The apparatus may further include means for determining that the first periodicity is active in response to receiving downlink control information scrambled with a cell radio network temporary identifier; and means for determining that the at least one second periodicity is active in response to not receiving the downlink control information scrambled with the cell radio network temporary identifier for a predetermined amount of time. The apparatus may further include means for determining that the first periodicity is active in response to a first predefined search space group being active and/or indicated to be active; and means for determining that the at least one second periodicity is active in response to a second predefined search space group being active and/or indicated to be active. The apparatus may further include means for determining that the first periodicity is active in response to a first predefined minimum scheduling offset restriction for uplink or downlink being active and/or indicated to be active; and means for determining that the at least one second periodicity is active in response to a second predefined minimum scheduling offset restriction for uplink or downlink being active and/or indicated to be active. The apparatus may further include means for determining that the at least one second periodicity is active in response to a plurality of consecutive channel state information values based on the first periodicity being the same or within a predetermined variation. The apparatus may further include means for reporting the channel state information irrespective of a currently used reporting periodicity while multiplexing channel state information together with a hybrid automatic repeat request acknowledgement based on the first periodicity. The apparatus may further include, when using the at least one second periodicity, means for continuing to measure the channel state information based on the first periodicity and, in response to a value of the channel state information differing from a previously reported channel state information value, means for reporting the channel state information based on the first periodicity, otherwise means for reporting the channel state information based on the at least one second periodicity.
An example apparatus includes means for providing a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; where the reporting of the channel state information, or the transmitting of the sounding reference signal is stopped or paused based on at least one of: providing a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or at least one second periodicity being active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
Other aspects of the apparatus may include the following. The measuring of the channel state information may be stopped or paused based on at least one of: providing a command to stop or pause the measuring of the channel state information; or the at least one second periodicity being active for performing the measuring of the channel state information. The command to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may comprise a command to skip monitoring of a downlink control channel. Whether to stop or pause the channel state information reporting, the channel state information measurement, or the sounding reference signal transmitting may depend further on a duration of the downlink control channel monitoring skipping. A time duration to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may be dependent on the duration of the downlink control channel monitoring skipping. The apparatus may further comprise means for not providing information or a command over a physical downlink control channel for a predetermined amount of time; where the first periodicity is changed to being active, or the second periodicity is changed to being active in response to the not providing of the information or the command over the physical downlink control channel for the predetermined amount of time. The apparatus may further comprise means for providing downlink control information to activate the at least one second periodicity. The at least one second periodicity may comprise an extended or prolonged period relative to a period of a previously active periodicity, to reduce a frequency of the reporting of the channel state information, the transmitting of the sounding reference signal, or the measuring of the channel state information. The apparatus may further include means for activating the first periodicity through providing downlink control information scrambled with a cell radio network temporary identifier; and means for activating the at least one second periodicity through not providing the downlink control information scrambled with the cell radio network temporary identifier for a predetermined amount of time. The apparatus may further include means for activating the first periodicity through activation of a first predefined search space group; and means for activating the at least one second periodicity through activation of a second predefined search space group. The apparatus may further include means for activating the first periodicity through activation of a first predefined minimum scheduling offset restriction for uplink or downlink; and means for activating the at least one second periodicity through activation of a second predefined minimum scheduling offset restriction for uplink or downlink. The at least one second periodicity may be active in response to detection failure for a plurality of consecutive channel state information reports based on the first periodicity. The apparatus may further comprise means for receiving the channel state information irrespective of a currently used reporting periodicity when the channel state information is multiplexed together with a hybrid automatic repeat request acknowledgement based on the first periodicity. The apparatus may further include, when the at least one second periodicity is used, means for receiving reporting of the channel state information based on the first periodicity, in response to a value of the channel state information differing from a previously reported channel state information value, otherwise means for receiving reporting of the channel state information based on the at least one second periodicity.
An example non-transitory program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine for performing operations may be provided, the operations including: receiving a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; and determining whether to stop or pause at least one of the reporting of the channel state information, or the transmitting of the sounding reference signal, based on at least one of: receiving a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or determining that at least one second periodicity is active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
Other aspects of the non-transitory program storage device may include the following. The operations of the non-transitory program storage device may further include determining whether to stop or pause measuring of channel state information based on at least one of: receiving a command to stop or pause the measuring of the channel state information; or determining that the at least one second periodicity is active for performing the measuring of the channel state information. The command to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may comprise a command to skip monitoring of a downlink control channel. Whether to stop or pause the channel state information reporting, the channel state information measurement, or the sounding reference signal transmitting may depend further on a duration of the downlink control channel monitoring skipping. A time duration to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may be dependent on the duration of the downlink control channel monitoring skipping. The operations of the non-transitory program storage device may further include changing to the first periodicity or the second periodicity in response to not receiving information or a command over a physical downlink control channel for a predetermined amount of time. The operations of the non-transitory program storage device may further include determining that the at least one second periodicity is active based on the second periodicity being indicated by downlink control information. The at least one second periodicity may comprise an extended or prolonged period relative to a period of a previously active periodicity, to reduce a frequency of the reporting of the channel state information, the transmitting of the sounding reference signal, or the measuring of the channel state information. The operations of the non-transitory program storage device may further include determining that the first periodicity is active in response to receiving downlink control information scrambled with a cell radio network temporary identifier; and determining that the at least one second periodicity is active in response to not receiving the downlink control information scrambled with the cell radio network temporary identifier for a predetermined amount of time. The operations of the non-transitory program storage device may further include determining that the first periodicity is active in response to a first predefined search space group being active and/or indicated to be active; and determining that the at least one second periodicity is active in response to a second predefined search space group being active and/or indicated to be active. The operations of the non-transitory program storage device may further include determining that the first periodicity is active in response to a first predefined minimum scheduling offset restriction for uplink or downlink being active and/or indicated to be active; and determining that the at least one second periodicity is active in response to a second predefined minimum scheduling offset restriction for uplink or downlink being active and/or indicated to be active. The operations of the non-transitory program storage device may further include determining that the at least one second periodicity is active in response to a plurality of consecutive channel state information values based on the first periodicity being the same or within a predetermined variation. The operations of the non-transitory program storage device may further include reporting the channel state information irrespective of a currently used reporting periodicity while multiplexing channel state information together with a hybrid automatic repeat request acknowledgement based on the first periodicity. The operations of the non-transitory program storage device may further include, when using the at least one second periodicity, continuing to measure the channel state information based on the first periodicity and, in response to a value of the channel state information differing from a previously reported channel state information value, reporting the channel state information based on the first periodicity, otherwise reporting the channel state information based on the at least one second periodicity.
An example non-transitory program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine for performing operations may be provided, the operations including providing a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; where the reporting of the channel state information, or the transmitting of the sounding reference signal is stopped or paused based on at least one of: providing a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or at least one second periodicity being active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
Other aspects of the non-transitory program storage device may include the following. Measuring of the channel state information may be stopped or paused based on at least one of: providing a command to stop or pause the measuring of the channel state information; or the at least one second periodicity being active for performing the measuring of the channel state information. The command to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may comprise a command to skip monitoring of a downlink control channel. Whether to stop or pause the channel state information reporting, the channel state information measurement, or the sounding reference signal transmitting may depend further on a duration of the downlink control channel monitoring skipping. A time duration to stop or pause the channel state information reporting, channel state information measurement, or the sounding reference signal transmitting may be dependent on the duration of the downlink control channel monitoring skipping. The operations of the non-transitory program storage device may further include not providing information or a command over a physical downlink control channel for a predetermined amount of time; where the first periodicity is changed to being active, or the second periodicity is changed to being active in response to the not providing of the information or the command over the physical downlink control channel for the predetermined amount of time. The operations of the non-transitory program storage device may further include providing downlink control information to activate the at least one second periodicity. The at least one second periodicity may comprise an extended or prolonged period relative to a period of a previously active periodicity, to reduce a frequency of the reporting of the channel state information, the transmitting of the sounding reference signal, or the measuring of the channel state information. The operations of the non-transitory program storage device may further include activating the first periodicity through providing downlink control information scrambled with a cell radio network temporary identifier; and activating the at least one second periodicity through not providing the downlink control information scrambled with the cell radio network temporary identifier for a predetermined amount of time. The operations of the non-transitory program storage device may further include activating the first periodicity through activation of a first predefined search space group; and activating the at least one second periodicity through activation of a second predefined search space group. The operations of the non-transitory program storage device may further include activating the first periodicity through activation of a first predefined minimum scheduling offset restriction for uplink or downlink; and activating the at least one second periodicity through activation of a second predefined minimum scheduling offset restriction for uplink or downlink. The at least one second periodicity may be active in response to detection failure for a plurality of consecutive channel state information reports based on the first periodicity. The operations of the non-transitory program storage device may further include receiving the channel state information irrespective of a currently used reporting periodicity when the channel state information is multiplexed together with a hybrid automatic repeat request acknowledgement based on the first periodicity. The operations of the non-transitory program storage device may further include, when the at least one second periodicity is used, receiving reporting of the channel state information based on the first periodicity, in response to a value of the channel state information differing from a previously reported channel state information value, otherwise receiving reporting of the channel state information based on the at least one second periodicity.
An example apparatus may include one or more circuitries configured to implement any of the methods described herein performed by a UE, including receiving a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; and determining whether to stop or pause at least one of the reporting of the channel state information, or the transmitting of the sounding reference signal, based on at least one of: receiving a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or determining that at least one second periodicity is active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
An example apparatus may include one or more circuitries configured to implement any of the methods described herein performed by a network (e.g. a gNB), including providing a configuration with a first periodicity for at least one of: a physical uplink control channel for reporting channel state information, or a transmitting of a sounding reference signal; where the reporting of the channel state information, or the transmitting of the sounding reference signal is stopped or paused based on at least one of: providing a command to stop or pause the reporting of the channel state information, or the transmitting of the sounding reference signal; or at least one second periodicity being active for performing the reporting of the channel state information, or the transmitting of the sounding reference signal.
It should be understood that the foregoing description is only illustrative. Various alternatives and modifications may be devised by those skilled in the art. For example, features recited in the various dependent claims could be combined with each other in any suitable combination(s). In addition, features from different embodiments described above could be selectively combined into a new embodiment. Accordingly, the description is intended to embrace all such alternatives, modifications and variances which fall within the scope of the appended claims.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2021/077339 | 10/5/2021 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 63092627 | Oct 2020 | US |
