Patent Application
20190230692
Embodiments of the present invention relate to the field of communications technologies, and in particular, to a method for releasing a semi-persistent scheduling resource and a device.
In a Long Term Evolution (LTE) communications system, a semi-persistent scheduling (SPS) allows a radio resource to be configured in a semi-persistent manner, and the resource is periodically allocated to user equipment (UE).
In the prior art, when an SPS is applied to a device-to-device (D2D) scenario or a vehicle-to-vehicle (V2V) scenario, UE may use the SPS to transmit a plurality of different types of service data. In this case, a base station configures a plurality of sets of SPS configuration parameters for the UE, and the UE may communicate with the base station and/or another UE by using a plurality of SPS resources. When the service data of the UE changes, for example, a cycle changes, the UE reports service change information to the base station, and the base station sends activation downlink control information (DCI), to instruct the UE to activate a new SPS resource. The base station also sends release DCI to the UE, to instruct the UE to release an original SPS resource.
However, one piece of DCI can be used to instruct a related operation on only one SPS. For example, two pieces of DCI are required to activate a new SPS resource and release an original SPS resource. When a plurality of SPSs change, a plurality of pieces of DCI are required, causing relatively large signaling overheads.
Embodiments of the present invention provide a method for releasing a semi-persistent scheduling resource and a device. According to this method, only one piece of DCI is required to instruct to activate an SPS resource and release an SPS resource, thereby reducing signaling overheads.
According to a first aspect, an embodiment of the present invention provides a method for releasing a semi-persistent scheduling resource, including:
receiving, by a base station, service information sent by UE, where the service information includes first service information of first service data, the first service information includes service change information or initial configuration information, and the service change information includes at least one of cycle change information and update information, and optionally, the initial configuration information includes at least one of a size of new first service data, an arrival moment, and a cycle, the cycle change information includes a new cycle of the first service data, and the update information includes a new size of the first service data and/or an arrival moment of the first service data; determining, by the base station based on the first service information, semi-persistent scheduling SPS information corresponding to the first service data, where the SPS information includes indication information of a new SPS resource, and optionally, the indication information of the new SPS resource includes indication information of a time-domain resource and indication information of a frequency-domain resource; and sending, by the base station, downlink control information DCI to the UE, where the DCI includes the SPS information, and the DCI is used to instruct the UE to activate the new SPS resource and release a target SPS resource, where the target SPS resource is an SPS resource corresponding to second service data that has been transmitted. In this embodiment of the present invention, the DCI is used to explicitly instruct the UE to activate the new resource, and to implicitly instruct the UE to release the target resource. That is, a function of activating the resource and releasing the resource is implemented by using one piece of DCI, reducing signaling overheads.
In a possible design, the service information further includes second service information corresponding to the second service data, and the second service information includes data sending completion information and an identifier of a second SPS corresponding to the second service data, and optionally, the data sending completion information is used to indicate that the second service data has been transmitted, and the identifier of the second SPS may be specifically an index of the second SPS;
the SPS information further includes an identifier of a first SPS corresponding to the new SPS resource;
the target SPS resource includes a resource corresponding to the identifier of the second SPS; and
after the sending, by the base station, DCI to the UE, the method further includes:
releasing, by the base station, the target SPS resource based on the identifier of the second SPS.
In a possible design, the second service data belongs to one piece of multi-cycle service data, where the multi-cycle service data includes a plurality of pieces of correlated service data in different cycles, and service data in each cycle is corresponding to a SPS resource;
the target SPS resource includes resources corresponding to the service data in the cycles; and
the releasing, by the base station, the target SPS resource based on the identifier of the second SPS includes:
releasing, by the base station, the target SPS resource based on an association relationship between the identifier of the second SPS and an identifier of another SPS.
In a possible design, the method further includes:
receiving, by the base station, the association relationship sent by the UE, which is specifically: when sending, by the UE, the service data, performing, by the UE, detection on the service data to obtain the association relationship, and sending the association relationship to the base station; or
sending, by the base station, the association relationship to the UE, which is specifically: when obtaining, by the base station, the association relationship based on the service information of the data reported by the UE, and sending the association relationship to the UE.
In a possible design, if the service change information includes the cycle change information, or the service change information includes the cycle change information and the update information, and the first service data includes service data whose transmission cycle is a first cycle and service data whose transmission cycle is a second cycle, the second service data is the service data whose transmission cycle is the first cycle, where the first cycle is a cycle before a change, and the second cycle is a cycle after the change;
the first service information further includes an identifier of an original first SPS corresponding to the service data whose transmission cycle is the first cycle;
the SPS information further includes an identifier of a new first SPS corresponding to the new SPS resource, where the new SPS resource is a resource corresponding to the service data whose transmission cycle is the second cycle;
the target SPS resource includes a resource corresponding to the identifier of the original first SPS; and
after the sending, by the base station, DCI to the UE, the method further includes:
releasing, by the base station, the target SPS resource based on the identifier of the original first SPS.
In a possible design, the method further includes:
sending, by the base station, release instruction information to the UE, where the release instruction information is used to instruct to enable a function that the DCI is used to instruct to release the target resource.
In a possible design, the release instruction information is specifically one of the following:
system information, radio resource control RRC signaling, media access control MAC layer signaling, and physical layer signaling. After one configuration, the release instruction information may be used a plurality of times in a relatively long time period. A person skilled in the art may understand that the physical layer signaling may alternatively be DCI sent by a base station to UE. The DCI includes an indication field, and in this case, a current indication takes effect at a current time.
According to a second aspect, an embodiment of the present invention provides a method for releasing a semi-persistent scheduling resource, including:
sending, by user equipment UE, service information to a base station, where the service information includes first service information of first service data, the first service information includes service change information or initial configuration information, and the service change information includes at least one of cycle change information and update information;
receiving, by the UE, downlink control information DCI sent by the base station, where the DCI includes semi-persistent scheduling SPS information corresponding to the first service data, the SPS information is determined by the base station based on the first service information, the SPS information includes indication information of a new SPS resource, and the DCI is used to instruct the UE to activate the new SPS resource and release a target SPS resource; and
activating, by the UE, the new SPS resource and releasing the target SPS resource according to an instruction of the DCI, where the target SPS resource is an SPS resource corresponding to second service data that has been transmitted.
In another possible design, for specific content included in the service information, the SPS information, and the target SPS resource, refer to the foregoing descriptions. Details are not described herein again.
According to a third aspect, an embodiment of the present invention provides a method for releasing a semi-persistent scheduling resource, including:
sending, by UE, service information to a base station, where the service information includes data sending completion information of M pieces of third service data and identifiers of M third SPSs, and M is a positive integer;
sending, by the base station, DCI to the UE, where the DCI includes identifiers of K SPSs, and the DCI is used to instruct to release resources corresponding to the identifiers of the M third SPSs; and K is a non-negative integer, and K≤M;
releasing, by the UE according to an instruction of the DCI, the resources corresponding to the identifiers of the M third SPSs; and
releasing, by the base station, the resources corresponding to the identifiers of the M third SPSs.
Different from DCI used for activation or update, the DCI in this embodiment does not need to indicate time-and-frequency-domain resources, so that bits originally used to indicate the time-and-frequency-domain resources may be reused to indicate indexes of SPSs of to-be-released resources, adding no additional bits to the DCI. In this embodiment, when no new SPS resources need to be activated, the resources corresponding to identifiers of a plurality of SPSs may be released simultaneously, reducing signaling overheads of the DCI.
According to a fourth aspect, an embodiment of the present invention provides a base station, including:
a receiving unit, configured to receive service information sent by UE, where the service information includes first service information of first service data, the first service information includes service change information or initial configuration information, and the service change information includes at least one of cycle change information and update information;
a processing unit, configured to determine, based on the first service information, semi-persistent scheduling SPS information corresponding to the first service data, where the SPS information includes indication information of a new SPS resource; and
a sending unit, configured to send downlink control information DCI to the UE, where the DCI includes the SPS information, and the DCI is used to instruct the UE to activate the new SPS resource and release a target SPS resource, where the target SPS resource is an SPS resource corresponding to second service data that has been transmitted.
Based on a same invention concept, for principle and beneficial effects of resolving a problem by the base station, refer to the first aspect, the possible designs of the first aspect, and the beneficial effects thereof Therefore, for implementation of the base station, refer to the method implementation, and details are not repeated.
According to a fifth aspect, an embodiment of the present invention provides user equipment, including:
a sending unit, configured to send service information to a base station, where the service information includes first service information of first service data, the first service information includes service change information or initial configuration information, and the service change information includes at least one of cycle change information and update information;
a receiving unit, configured to receive downlink control information DCI sent by the base station, where the DCI includes semi-persistent scheduling SPS information corresponding to the first service data, the SPS information is determined by the base station based on the first service information, the SPS information includes indication information of a new SPS resource, and the DCI is used to instruct the UE to activate the new SPS resource and release a target SPS resource; and
a processing unit, configured to activate the new SPS resource and release the target SPS resource according to an instruction of the DCI, where the target SPS resource is an SPS resource corresponding to second service data that has been transmitted.
Based on a same invention concept, for principle and beneficial effects of resolving a problem by the user equipment, refer to the second aspect, the possible designs of the second aspect, and the beneficial effects thereof Therefore, for implementation of the user equipment, refer to the method implementation, and details are not repeated.
According to a sixth aspect, an embodiment of the present invention provides a base station, including a processor and a memory, where
the memory is configured to store computer-executable program code, where the program code includes an instruction; and when the processor executes the instruction, the instruction enables the processor to execute the method for releasing the semi-persistent scheduling resource implemented according to any one of the first aspect and the possible designs of the first aspect.
According to a seventh aspect, an embodiment of the present invention provides user equipment, including: a processor and a memory, where
the memory is configured to store computer-executable program code, where the program code includes an instruction; and when the processor executes the instruction, the instruction enables the processor to execute the method for releasing the semi-persistent scheduling resource implemented according to any one of the second aspect and the possible designs of the second aspect.
The embodiments provide the method for releasing a semi-persistent scheduling resource and the device. In the method, the UE sends the service information to the base station, where the service information includes the first service information of the first service data; and the base station determines, based on the first service information, the SPS information corresponding to the first service data, and sends the DCI including the SPS information to the UE, where the SPS information includes the indication information of the new SPS resource, and the DCI may instruct the UE to activate the new SPS resource and release the SPS resource corresponding to the second service data that has been transmitted, that is, the DCI explicitly instructs the UE to activate the new SPS resource and implicitly instructs the UE to release the SPS resource corresponding to the second service data, so that one piece of DCI is used to implement resource activation and release, reducing signaling overheads.
To describe the technical solutions in the embodiments of the present invention more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description show some embodiments of the present invention, and a person of ordinary skill in the art may derive other drawings from these accompanying drawings without creative efforts.
To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following clearly describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
Network architectures and business scenarios described in the embodiments of the present invention are intended to more clearly describe the technical solutions in the embodiments of the present invention, but are not intended to limit the technical solutions provided in the embodiments of the present invention. A person of ordinary skill in the art may know that as the network architectures evolve and a new business scenario emerges, the technical solutions provided in the embodiments of the present invention are further applicable to a similar technical problem.
The following describes a possible network architecture according to an embodiment of the present invention with reference to
In this embodiment, when communicating with the base station, the UE may further implement device-to-device (D2D) communication with another UE. When the UE is an in-vehicle device, vehicle-to-vehicle (V2V) communication may be implemented between in-vehicle devices.
In this embodiment, a D2D communication scenario is used as an example. When the UE is located in a cell coverage area of the base station, the UE can communicate with both the base station and another UE. Communication between UEs may be directly performed without forwarding by the base station, and the base station may perform resource configuration, scheduling, coordination, and the like, to assist the direct communication between the UEs. Before performing data transmission, the UE first applies to the base station for a semi-persistent scheduling (SPS) resource, and reports service information of the UE to the base station. The base station allocates a corresponding resource to the UE based on the service information reported by the UE.
The SPS resource in this embodiment may be a sidelink SPS resource, namely, an SPS resource corresponding to an air interface between the UEs. The SPS resource may be further an SPS resource corresponding to an air interface between the UE and the base station. An SPS resource described in the following embodiments may be specifically at least one of the foregoing.
When the base station allocates the SPS resource to the UE, the base station may first send SPS configuration information to the UE. The SPS configuration information includes an SPS radio network temporary identifier (RNTI) and a plurality of sets of SPS configuration parameters, and each set of the SPS configuration parameter may include a cycle and the like. Then, the base station sends, to the UE, downlink control information (DCI) scrambled by using an SPS-RNTI. The DCI includes indication information of a new SPS resource. Specifically, a time-domain resource used when service data is transmitted for a first time depends on a moment at which the DCI is delivered (a subsequent Nt subframe), for example, N=4. During subsequent retransmission, a time-domain resource is indicated by time-domain resource indication information in the DCI, and a frequency-domain resource is indicated by frequency-domain resource indication information in the DCI. After the UE receives the DCI, the SPS resource is activated, and the UE periodically sends service data by using the SPS resource. When the UE completes transmitting the service data by using the SPS resource, the UE needs to release the SPS resource.
For a process in which the UE releases the SPS resource, this embodiment of the present invention provides a method for releasing the SPS resource, to resolve a prior-art problem that two pieces of DCI are required to activate a new SPS resource and release an original SPS resource, causing relatively large signaling overheads, or to resolve a similar problem.
S201: UE sends service information to a base station, where the service information includes first service information of first service data.
When the service data changes, the UE sends the service information to the base station. The service information includes first service information of first service data, the first service information includes service change information or initial configuration information, and the service change information includes at least one of cycle change information and update information.
A form of the first service data may be specifically classified into the following several possible cases: The first service data is data whose cycle changes. The first service information includes the cycle change information, and the cycle change information includes a new cycle of the first service data. Specifically, the first service data includes service data whose transmission cycle is a first cycle and service data whose transmission cycle is a second cycle. The first cycle is a cycle before a change, the second cycle is a cycle after a change, and the service data whose transmission cycle is the first cycle has been transmitted.
The first service data is data whose data size, and/or data arrival moment, and the like change. The first service information includes update information, and the update information includes a new size of the first service data and/or an arrival moment of the first service data. Specifically, the first service data includes original data and updated information, and the original data has been transmitted.
When the first service data is data whose cycle changes and data size and/or data arrival moment, and the like change, the first service information includes the cycle change information and the update information. Specifically, the first service data includes data before the change and data after the change, and the data before the change has been transmitted.
When the first service data is new service data, the first service information includes the initial configuration information. The initial configuration information includes at least one of a size, an arrival moment, a cycle of the new data, and the like.
S202: The base station determines, based on the first service information, SPS information corresponding to the first service data, where the SPS information includes indication information of a new SPS resource.
The base station receives the service information sent by the UE, and the base station determines, based on the first service information, for example, the service change information or the initial configuration information in the first service information, the SPS information corresponding to the first service data, where the SPS information includes the indication information of the new SPS resource allocated by the base station to the first service data.
For example, if the first service information includes the initial configuration information, the new SPS resource is allocated for the new first service data. If the first service information includes the service change information, the new SPS resource is allocated for the service data whose transmission cycle is the second cycle, the updated data, or the data after the change.
5203: The base station sends DCI to the UE, where the DCI includes the SPS information, and the DCI is used to instruct the UE to activate the new SPS resource and release a target SPS resource.
The base station sends the DCI to the UE. Optionally, to enable the UE to identify that the secluding is SPS scheduling, the base station scrambles the DCI by using an SPS-RNTI. After receiving the DCI, the UE descrambles the DCI, to obtain the SPS information. The SPS information is used to indicate frequency-domain information of the new SPS resource, and time-domain information of the new SPS resource depends on a delivering moment of the DCI (a subsequent fourth subframe). The SPS information in the DCI is used to instruct the UE to activate the new SPS resource. Further, the DCI is further used to instruct the UE to release a target resource, and the target resource is an SPS resource corresponding to second service data that has been transmitted. That is, the DCI does not include related information about the target resource, but the DCI has an implicit indication function.
S204: The UE activates the new SPS resource and releases the target SPS resource according to an instruction of the DCI, where the target SPS resource is an SPS resource corresponding to second service data that has been transmitted.
After the UE receives the DCI sent by the base station, UE activates the new SPS resource and releases the target SPS resource according to an instruction of the DCI. That is, although the DCI does not include the related information about the target SPS resource, the DCI has the implicit indication function, so that the UE releases the target SPS resource when activating the new SPS resource. That is, functions of activating the resource and releasing the resource are implemented by using only one piece of DCI.
Optionally, in this embodiment, the DCI also has an implicit indication function of releasing the target resource when having an explicit indication function of activating the new SPS resource. This may be agreed upon in advance between the UE and the base station, may be defaulted by a system, or may be indicated by the base station to the UE.
For example, before the base station sends the DCI to the UE, the base station may alternatively send release instruction information to the UE, and the UE receives the release instruction information sent by the base station. The release instruction information is used to instruct to enable a function that the DCI is used to instruct to release the target resource. Optionally, a corresponding indication field may be added in the release instruction information. The release instruction information may be system information, radio resource control (RRC) signaling, media access control (MAC) layer signaling, and physical layer signaling. After one configuration, the release instruction information may be used a plurality of times in a relatively long time period. A person skilled in the art may understand that the physical layer signaling may alternatively be DCI sent by a base station to UE. The DCI includes an indication field, and in this case, a current indication takes effect at a current time.
A person skilled in the art may understand that the release instruction information may alternatively instruct to disable the function that the DCI is used to instruct to release the target resource. In this case, after receiving the DCI, the UE only activates the new SPS resource, and does not perform an operation of releasing the target resource. For example, a 1-bit indication field exists in the release instruction information. When the indication field indicates 0, the function that the DCI is used to instruct to release the target resource is disabled. When the indication field indicates 1, the function that the DCI is used to instruct to release the target resource is enabled.
That the UE activates the new SPS resource indicates that the UE starts to use the SPS resource to perform data transmission. That the UE releases the target SPS resource indicates that the UE does not use the SPS resource, the SPS resource becomes an available resource, and the base station may allocate the resource to another UE.
In this embodiment, the target resource is an SPS resource corresponding to second service data that has been transmitted. That is, the second service data has been transmitted, and the resource corresponding to the second service data can be released.
The target resource may include a resource corresponding to data that has been transmitted and a resource in the following forms: a resource corresponding to data whose transmission cycle is a first cycle, a resource corresponding to the service data before an update, and a resource corresponding to the service data before a change. The latter three may be determined based on a content included in the first service information.
According to the method for releasing a semi-persistent scheduling resource in this embodiment, the UE sends the service information to the base station, where the service information includes the first service information of the first service data, and the base station determines, based on the first service information, the SPS information corresponding to the first service data, and sends the DCI including the SPS information to the UE, the SPS information includes the indication information of the new SPS resource, and the DCI may instruct the UE to activate the new SPS resource and release the SPS resource corresponding to the second service data that has been transmitted, that is, the DCI explicitly instructs the UE to activate the new SPS resource and implicitly instructs the UE to release the SPS resource corresponding to the second service data, so that one piece of DCI is used to implement resource activation and release, reducing signaling overheads.
In the following embodiment shown in
S301: UE sends service information to a base station, where the service information includes first service information of first service data, and the first service information includes service change information and an identifier of an original first SPS.
Specifically, the service change information includes cycle change information, or the service change information includes the cycle change information and update information, and correspondingly, the first service data includes service data whose transmission cycle is a first cycle and service data whose transmission cycle is a second cycle, the second service data in the embodiment shown in
The first service information further includes an identifier of an original SPS corresponding to the service data whose transmission cycle is the first cycle, to instruct the base station to release a resource corresponding to the identifier of the original first SPS.
S302: The base station determines, based on the first service information, SPS information corresponding to the first service data, where the SPS information includes indication information of a new SPS resource and an identifier of a new first SPS corresponding to the new SPS resource.
For a process that the base station determines the indication information of the new SPS resource, refer to S202, and details are not described in this embodiment again. In this embodiment, the base station further determines the identifier of the new first SPS corresponding to the new SPS resource.
S303: The base station sends DCI to the UE, where the DCI includes the SPS information, and the DCI is used to instruct the UE to activate the new SPS resource and release a target SPS resource.
S304: The UE activates the new SPS resource and releases the target SPS resource according to an instruction of the DCI, where the target SPS resource includes a resource corresponding to the identifier of the original first SPS.
In this embodiment, because the service data whose transmission cycle is the first cycle has been transmitted, the target SPS resource includes the resource corresponding to the identifier of the original first SPS. For a process that the UE activates the new SPS resource and releases the target SPS resource, refer to S203 and S204 in the embodiment shown in
S305: The base station releases the target resource based on the identifier of the original first SPS.
A person skilled in the art may understand that there is no timing restriction between S304 and S305. Specifically, it can be learned from S301 that the first service information includes the identifier of the original first SPS, and the resource corresponding to the identifier of the original first SPS is the resource corresponding to the service data whose transmission cycle is the first cycle, namely, the resource corresponding to the identifier of the original first SPS. The resource has been transmitted, and is no longer used by the UE, and the base station has sent the DCI to implicitly instruct to release the resource corresponding to the identifier of the original first SPS. Therefore, the base station releases the target resource, and the target resource includes the resource corresponding to the identifier of the original SPS.
The following uses an embodiment as an example for detailed description. The UE activates one SPS resource to send cyclic data whose cycle is 200 ms, and an index of the SPS is 2 (an identifier of an original first SPS). Then, the cycle of the cyclic data of the UE changes to 100 ms, the UE reports the first service information to the base station. The first service information includes an index 2 of an SPS, a new cycle 100 ms of the data, and/or an arrival moment of the data. After receiving the first service information, the base station sends DCI scrambled by using an SPS RNTI to the UE, to instruct the UE to use a new SPS whose index is 3 (an identifier of a new first SPS) and cycle is 100 ms. The DCI indicates the index 3 of the new SPS, a time-frequency position of the SPS resource, and the like. The UE sends the data whose new cycle is 100 ms on the SPS resource whose index is 3 and releases the SPS resource whose index is 2, based on the DCI sent by the base station.
On condition that the service change information at least includes the cycle change information in this embodiment, one piece of DCI rather than two pieces of DCI is used to explicitly instruct the UE to activate the new resource, and to implicitly instruct the UE to release the resource used before a change, reducing signaling overheads of the base station.
On a basis of the embodiments shown in
S401: UE sends service information to a base station, where the service information includes first service information of first service data and second service information corresponding to second service data.
For an implementation of the first service information of the first service data, refer to S201, and details are not further described herein in this embodiment. The second service data is specifically data that has been transmitted, and the second service information correspondingly includes data sending completion information and an identifier of a second SPS corresponding to the second service data. The data sending completion information is used to indicate that the second service data has been transmitted. The identifier of the second SPS may be specifically an index of the second SPS. All SPS identifiers in this embodiment may be SPS indexes. The index of each SPS is corresponding to indication information of the resource allocated by the base station for the SPS, a cycle of the SPS, a size of the service data, and the like.
In this embodiment, when applying for a new SPS resource for the first service data, the UE may also report the identifier of the second SPS of the second service data that has been transmitted, to instruct the base station to release a resource corresponding to the identifier of the second SPS.
S402: The base station determines, based on the first service information, SPS information corresponding to the first service data, where the SPS information includes indication information of a new SPS resource and an identifier of a first SPS corresponding to the new SPS resource.
For a process that the base station determines the indication information of the new SPS resource, refer to S202, and details are not described in this embodiment again. In this embodiment, the base station further determines the identifier of the first SPS corresponding to the new SPS resource, namely, an index of the first SPS.
S403: The base station sends DCI to the UE, where the DCI includes the SPS information, and the DCI is used to instruct the UE to activate the new SPS resource and release a target SPS resource.
S404: The UE activates the new SPS resource and releases the target SPS resource according to an instruction of the DCI, where the target SPS resource includes a resource corresponding to an identifier of a second SPS.
In this embodiment, the implementation steps of S403 and S404 are similar to those of S203 and S204 in the embodiment in
It should be noted that, in this embodiment, the UE may send the second service information of a plurality of pieces of the second service data, and therefore when releasing the resource corresponding to the identifier of the second SPS, the UE may release a plurality of resources. That is, when explicitly instructing to activate the new resource, one piece of DCI can implicitly instruct to release a plurality of resources, reducing signaling overheads.
S405: The base station releases the target SPS resource based on the identifier of the second SPS.
A person skilled in the art may understand that there is no strict time sequence relationship between step 404 and step 405. Specifically, it can be learned from S401 that the second service information includes the data sending completion information and the identifier of the second SPS corresponding to the second service data. The base station may learn, based on the second service information, that the second service data has been transmitted, the UE does not need the resource corresponding to the identifier of the second SPS, and the base station has already sent the DCI to the UE to implicitly instruct to release the resource corresponding to the identifier of the second SPS. Therefore, the base station also releases the resource corresponding to the identifier of the second SPS corresponding to the second service data, that is, the base station determines that the resource corresponding to the identifier of the second SPS is a resource that can be allocated to another UE.
A person skilled in the art may understand that, in S402, the identifier of the first SPS included in the SPS information is intended to make the UE store the identifier of the first SPS corresponding to the new SPS resource. When the UE completes transmitting the first service data by using the new SPS resource, the UE may report the identifier of the first SPS, to make the base station release the resource corresponding to the identifier of the first SPS.
A person skilled in the art may understand that when releasing the resource corresponding to the identifier of the second SPS, the base station may further release one of a resource corresponding to data whose transmission cycle is a first cycle, a resource corresponding to service data before an update, and a resource corresponding to service data before a change. Which resource is specifically released is determined by content included in the first service information.
The following uses a specific embodiment as an example for detailed description. When service data changes, for example, the second service data has been transmitted, and the new cyclic first service data is to be transmitted, the UE reports service information to the base station, including initial configuration information of the first service data and the data sending completion information of the second service data. The base station sends, to the UE, activation DCI scrambled by using an SPS RNTI. The activation DCI includes SPS information, where the SPS information includes indication information used to indicate a new SPS resource, and further includes the identifier (index) of the first SPS corresponding to the new SPS resource. The DCI further implicitly instructs the UE to release the resource corresponding to the identifier of the second SPS. The UE periodically sends data on the new SPS resource, and releases the resource corresponding to the identifier of the second SPS.
For example, the UE activates the resource corresponding to the identifier of the second SPS to send cyclic service data whose cycle is 200 ms, and an index of the SPS is 2. After the service data has been transmitted, the new cyclic first service data arrives and waits to be transmitted, and a cycle is 100 ms. In this case, the UE reports the service information to the base station, including the index 2 of the SPS, information indicating that the data has been transmitted and the new cyclic first service data is to be transmitted, the new cycle 100 ms, and/or an arrival moment of the first service data. After receiving the service information, the base station sends, to the UE, the activation DCI scrambled by using the SPS RNTI, to instruct the UE to use the new SPS resource whose cycle is 100 ms, and to implicitly release a resource corresponding to the original SPS whose index is 2. The activation DCI indicates that the index corresponding to the new SPS resource is 3, a time-frequency position of the new SPS resource, and the like. Based on the activation DCI sent by the base station, the UE sends the first service data on the new SPS resource whose index is 3 and implicitly releases the resource corresponding to the original SPS whose index is 2.
A person skilled in the art may understand that, in this process, the released resource corresponding to the identifier of the second SPS may be a resource corresponding to an identifier of one second SPS, or may be resources corresponding to identifiers of a plurality of second SPSs. The released SPS resource and the activated new SPS resource are independent of each other, and they have no a continuation or replacement relationship, but are merely close in time.
The foregoing solution may also be applied to a process in which updating and releasing SPS resource are simultaneously performed. For example, the UE activates the resource corresponding to the identifier of the second SPS to send the cyclic service data whose cycle is 200 ms, and the index of the SPS is 2. After the service data is transmitted, a data size of the first service data changes and/or the arrival moment of the service data happens to change, but a cycle does not change. The UE reports the service information to the base station, including that the index of the SPS is 2, information indicating data sending completion, and update information of the first service data. After receiving the service information, the base station sends, to the UE, the update DCI scrambled by using the SPS RNTI, to instruct the UE to use the new SPS resource, and to implicitly release a resource corresponding to the original SPS whose index is 2. The update DCI also indicates a time-frequency position of the new SPS resource, and the like, and an index of the new SPS resource is unchanged. Based on the update DCI sent by the base station, the UE sends the first service data on the new SPS resource and implicitly releases the resource corresponding to the original SPS whose index is 2 and a resource corresponding to original service data before an update.
In a process of activating or updating the SPS resource in this embodiment, one piece of DCI can implement a process of updating the new SPS resource and releasing the target SPS resource, thereby reducing signaling overheads.
Further, in the embodiment shown in
Specifically, an association relationship may exist among the released resources corresponding to identifiers of a plurality of second SPSs. For example, the cyclic data always arrives, at a fixed interval (for example, an interval of 100 ms), in a form of one large data segment (300 bytes) and four small data segments (190 bytes). In this case, an eNB may activate two second SPS resources for the UE, where one resource is used to transmit 190-byte data whose cycle is 100 ms, and the other resource is used to transmit 300-byte data whose cycle is 500 ms. When the cyclic data has been transmitted, resources corresponding to identifiers of two second SPSs need to be released simultaneously. In this embodiment, the UE only needs to report an identifier of one second SPS to the base station, and the base station releases, based on the association relationship between the identifier of the second SPS and an identifier of another SPS, the resources corresponding to the service data in the cycles. In addition, the UE releases, according to an instruction of the DCI, the resources corresponding to the service data in the cycles.
In this embodiment, the foregoing association relationship may be obtained by detecting the service data when the UE sends the service data, and then the UE sends the association relationship to the base station. Alternatively, the association relationship may be obtained by the base station based on the service information of the data reported by the UE, and the base station sends the association relationship to the UE.
S501: UE sends service information to a base station, where the service information includes data sending completion information of M pieces of third service data and identifiers of M third SPSs, and M is a positive integer.
S502: The base station sends DCI to the UE, where the DCI includes identifiers of K SPSs, and the DCI is used to instruct to release resources corresponding to the identifiers of the M third SPSs, K is a non-negative integer, and K≤M.
S503: The UE releases, according to an instruction of the DCI, the resources corresponding to the identifiers of the M third SPSs.
S504: The base station releases the resources corresponding to the identifiers of the M third SPSs.
In this embodiment, there is no timing restriction between step 503 and step 504.
In one implementation, when the service data changes, if data on a plurality of SPSs has been transmitted, the UE sends the service information to the base station. The base station sends DCI to the UE, and the DCI may be release DCI. The DCI includes identifiers of K SPSs, and the identifier may be an index. If resources corresponding to identifiers of two SPSs are to be released, the release DCI includes indexes corresponding to the identifiers of the two SPSs. Different from DCI used for activation or update, the release DCI does not need to indicate time-and-frequency-domain resources, so that bits originally used to indicate the time-and-frequency-domain resources may be reused to indicate indexes of SPSs of to-be-released resources, adding no additional bits to the DCI.
Optionally, the release DCI may alternatively include an index of only one to-be-released SPS resource. If resources corresponding to identifiers of two SPSs are to be released, the release DCI includes only an index corresponding to one of the SPSs, for example, an index corresponding to a reported first SPS, or a smaller index.
The UE releases the resources corresponding to the identifiers of the M third SPSs according to the instruction of the DCI, and correspondingly, the base station also releases the resources corresponding to the identifiers of the M third SPSs.
A person skilled in the art may understand that when the identifiers of the SPSs have the association relationship in the embodiment shown in
In this embodiment, when no new SPS resources are to be activated, the resources corresponding to identifiers of a plurality of SPSs may be released simultaneously, reducing signaling overheads of the DCI.
The foregoing mainly describes the solutions provided in the embodiments of the present invention from the perspective of interaction between the base station and the UE. It may be understood that, to implement the foregoing functions, the base station and the UE include a corresponding hardware structure and/or software module for performing each of the functions. With reference to the examples described in the embodiments disclosed in the present invention, units and algorithm steps can be implemented by hardware or a combination of hardware and computer software in this embodiment of the present invention. Whether a function is performed by hardware or computer software driving hardware depends on particular applications and design constraints of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but it should not be considered that the implementation goes beyond the scope of the technical solutions in the embodiments of the present invention.
In this embodiment of the present invention, functional units of the base station and the UE may be divided based on the foregoing method example. For example, functional units may be divided in correspondence to functions, or two or more functions may be integrated into one processing unit. The integrated unit may be implemented in a form of hardware, or may be implemented in a form of a software functional module. It should be noted that the unit division in the embodiments of the present invention is an example, and is merely logical function division. There may be another division manner in an actual implementation.
When an integrated unit is used,
Specifically, the receiving unit 11 is configured to receive service information sent by the UE. The service information includes first service information of first service data, the first service information includes service change information or initial configuration information, and the service change information includes at least one of cycle change information and update information.
The processing unit 12 is configured to determine, based on the first service information, semi-persistent scheduling SPS information corresponding to the first service data. The SPS information includes indication information of a new SPS resource.
The sending unit 13 is configured to send downlink control information DCI to the UE. The DCI includes the SPS information, and the DCI is used to instruct the UE to activate the new SPS resource and release a target SPS resource, and the target SPS resource is an SPS resource corresponding to second service data that has been transmitted.
The base station provided in this embodiment may be configured to execute the method embodiment shown in
Optionally, the receiving unit 11 is further configured to support the base station in performing S301 shown in
The receiving unit 11 may be a receiver, the sending unit 13 may be a transmitter, and the processing unit 12 may be a processor or a controller, for example, may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), another programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The processing unit may implement or execute various example logical blocks, units, and circuits that are described with reference to the content disclosed in the present invention. The processor may alternatively be a combination implementing a computing function, for example, a combination including one or more microprocessors, or a combination of a DSP and a microprocessor.
When the processing unit 12 is a processor, the receiving unit 11 is a receiver, and the sending unit 13 is a transmitter, the base station in this embodiment of the present invention may be shown in
When an integrated unit is used,
The sending unit 31 is configured to send service information to a base station. The service information includes first service information of first service data, the first service information includes service change information or initial configuration information, and the service change information includes at least one of cycle change information and update information.
The receiving unit 32 is configured to receive downlink control information DCI sent by the base station. The DCI includes semi-persistent scheduling SPS information corresponding to the first service data, the SPS information is determined by the base station based on the first service information, the SPS information includes indication information of a new SPS resource, and the DCI is used to instruct the UE to activate the new SPS resource and release a target SPS resource.
The processing unit 33 is configured to activate the new SPS resource and release the target SPS resource according to an instruction of the DCI. The target SPS resource is an SPS resource corresponding to second service data that has been transmitted.
The user equipment according to this embodiment may be configured to execute the method embodiment shown in
Optionally, the sending unit 31 is further configured to support the base station in performing S301 shown in
The receiving unit 32 may be a receiver, the sending unit 31 may be a transmitter, and the processing unit 33 may be a processor or a controller, for example, may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), another programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The processing unit may implement or execute various example logical blocks, units, and circuits that are described with reference to the content disclosed in the present invention. The processor may alternatively be a combination implementing a computing function, for example, a combination including one or more microprocessors, or a combination of a DSP and a microprocessor.
When the processing unit 33 is a processor, the receiving unit 32 is a receiver, and the sending unit 31 is a transmitter, the user equipment in this embodiment of the present invention may be shown in
Finally, it should be noted that the foregoing embodiments are merely intended to describe the technical solutions of the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some or all technical features thereof, without departing from the scope of the technical solutions of the embodiments of the present invention.
This application is a continuation of International Application No. PCT/CN2016/100738, filed on Sep. 29, 2016, the disclosure of which is hereby incorporated by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2016/100738 | Sep 2016 | US |
| Child | 16368900 | US |
