Patent Application
20210212096
A mobile communication system typically comprises a transceiver, e.g. a transceiver of the base station, and a plurality of mobile transceivers, e.g. of e UE or of a vehicle. The different mobile transceivers typically may use at different point of times a different amount of resources. According to common communication systems, there are two widespread resource allocation modes:
Both resource allocation modes do not enable to take into account the current requirements for resources of the different mobile transceivers. Therefore, there is a need for an improved approach enabling a resource redistribution.
An embodiment may have a method for managing resources within a communication system, the communication system including a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver has a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the method having the steps of: exchanging resource controlling information between the first and the second mobile transceivers; and granting or offering the portion of the first resources for the second transceiver as response to exchanging resource controlling information, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; or exchanging resource controlling information regarding a physical resource block between the first and the second mobile transceivers so as to offer the portion of the first resources shared for the second transceiver such that same can directly use the portion.
Another embodiment may have a method for offering resources within a communication system, the communication system including a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver has a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the method having the steps of: exchanging resource controlling information regarding a physical resource block including the sub-step of offering the portion to a second mobile transceiver, wherein the offering is performed by the first mobile transceiver by unicasting and/or multicasting and/or broadcasting a resource offering message such that the second mobile transceiver can directly use the offered portion; or exchanging resource controlling information including the sub-step of offering the portion to a second mobile transceiver, wherein the offering is performed by the first mobile transceiver by unicasting and/or multicasting and/or broadcasting a resource offering message, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; and granting the portion using a resource granting message such that the second mobile transceiver can use the offered portion.
Another embodiment may have a method for requesting or using resources within a communication system, the communication system including a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver has a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the method having the steps of: exchanging resource controlling information including the sub-step of requesting resources, wherein the requesting is performed by the second mobile transceiver by unicasting and/or multicasting and/or broadcasting a resource request message such that the first mobile transceiver can grant the portion for the second mobile transceiver, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; or exchanging resource controlling information including the sub-step of requesting resources, wherein the requesting is performed by the second mobile transceiver by unicasting and/or multicasting and/or broadcasting a resource request message; and using the portion when the first mobile transceiver has granted the portion for the second mobile transceiver, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; or receiving resource controlling information regarding a physical resource block including an offering of a portion of the first resources for the second transceiver such that same can directly use the portion.
Another embodiment may have a method for managing resources within a communication system, the communication system including a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver has a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the method having the step of: exchanging resource controlling information between the first and the second mobile transceivers using a toggling sub-frame or a toggling control frame to manage resource.
Another embodiment may have a non-transitory digital storage medium having a computer program stored thereon to perform the method for managing resources within a communication system, the communication system including a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver includes a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the method having the steps of: exchanging resource controlling information between the first and the second mobile transceivers; and granting or offering the portion of the first resources for the second transceiver as response to exchanging resource controlling information, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; or exchanging resource controlling information regarding a physical resource block between the first and the second mobile transceivers so as to offer the portion of the first resources shared for the second transceiver such that same can directly use the portion, when said computer program is run by a computer.
Another embodiment may have a second mobile transceiver belonging to a communication system, the communication system including a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver has a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the second mobile transceiver is configured to exchange resource controlling information by requesting resources, using unicasting and/or multicasting and/or broadcasting a resource request message such that first mobile transceiver can grant the portion for the first mobile transceiver, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; or the second mobile transceiver is configured to exchange resource controlling information by requesting resources, using unicasting and/or multicasting and/or broadcasting a resource request message; and to use the portion when that first mobile transceiver has granted the portion for the first mobile transceiver, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; or the second mobile transceiver is configured to receive resource controlling information regarding a physical resource block including an offering of a portion of the first resources for the second transceiver such that same can directly use the portion.
Another embodiment may have a first mobile transceiver belonging to a communication system, the communication system including a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver has a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the first mobile transceiver is configured to exchange resource controlling information regarding a physical resource block by offering the portion to the second mobile transceiver, using unicasting and/or multicasting and/or broadcasting a resource offering message such that the second mobile transceiver can directly use the offered portion, or the first mobile transceiver is configured to exchange resource controlling information by offering the portion to a second mobile transceiver, using unicasting and/or multicasting and/or broadcasting a resource offering message, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; and to grant the portion using a resource granting message such that the second mobile transceiver can use the portion.
Another embodiment may have a user equipment or vehicle including an inventive second mobile transceiver or a first mobile transceiver belonging to a communication system, the communication system includes a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver includes a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the first mobile transceiver is configured to exchange resource controlling information regarding a physical resource block by offering the portion to the second mobile transceiver, using unicasting and/or multicasting and/or broadcasting a resource offering message such that the second mobile transceiver can directly use the offered portion, or the first mobile transceiver is configured to exchange resource controlling information by offering the portion to a second mobile transceiver, using unicasting and/or multicasting and/or broadcasting a resource offering message, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; and to grant the portion using a resource granting message such that the second mobile transceiver can use the portion.
Another embodiment may have a communication system, the communication system including a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver has a portion of the first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the communication system is configured for: exchanging resource controlling information between the first and the second mobile transceivers; and granting or offering the portion of the first resources for the second transceiver as response to exchanging resource controlling information, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; or exchanging resource controlling information regarding a physical resource block between the first and the second mobile transceivers so as to offer the portion of the first resources for the second transceiver such that same can directly use the portion.
Another embodiment may have a communication system, the communication system including a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver has a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the communication system includes a second mobile transceiver according to claim 24 and/or a first mobile transceiver belonging to a communication system, the communication system includes a first mobile transceiver and a second mobile transceiver, wherein the first mobile transceiver includes a portion of first resources to be granted and/or shared and/or offered and wherein the second mobile transceiver may use more resources, the first mobile transceiver is configured to exchange resource controlling information regarding a physical resource block by offering the portion to the second mobile transceiver, using unicasting and/or multicasting and/or broadcasting a resource offering message such that the second mobile transceiver can directly use the offered portion, or the first mobile transceiver is configured to exchange resource controlling information by offering the portion to a second mobile transceiver, using unicasting and/or multicasting and/or broadcasting a resource offering message, wherein the first resources to be granted and/or shared and/or offered are resources to be used for the communication between the base station and the respective mobile transceiver; and to grant the portion using a resource granting message such that the second mobile transceiver can use the portion.
An embodiment provides a method for managing/sharing resources within a communication network. The communication network comprises a transceiver (e.g. a base station), a first mobile transceiver (e.g. a mobile device or a vehicle) and a second mobile transceiver (e.g. another device or another vehicle) or alternatively just the two mobile transceiver (e.g. in case of preconfigured resources). The transceiver may be configured to exchange data and/or control information with the first mobile transceiver using first resource e.g. selected resources or resources allocated to the first mobile transceiver and to exchange data and/or control information with the second mobile transceiver. The second mobile transceiver using second resources e.g. selected ones or resources allocated to the second mobile transceiver. Here, the resource allocation may, for example, be performed according to one of the above discussed resource allocation modes (centralized or autonomously/distributed). The first mobile transceiver (also referred to as donor) has an unused/free/not required portion of the first resources which can be shared, offered or granted, wherein the second mobile transceiver (also referred to as taker) may use more resources. The method for sharing the resources comprises two basic steps, namely exchanging resource controlling information between the first and the second mobile transceivers, e.g. directly, and granting or offering the portion of the first resources (or the entire resources) for the second transceiver as response exchanging resource controlling information. Alternatively, the method may be executed as following: exchanging resource controlling information between the first and the second mobile transceivers so as to offer the portion of the first resources for the second transceiver such that same can directly use the respective portion (or the entire resources). Thus, offering means providing information so as to enabled to directly use the offered resources. Note the resources to be shared, granted or offered may be (selected/allocated and) unused or (selected/allocated and) used preconfigured resources or non-allocated but free resources.
As indicated above the resource management/sharing method may have two variants: According to a first embodiment, the exchanging resource controlling information is initiated by the first mobile transceiver, e.g. using a resource offering message, such that the second mobile transceiver can react so as to use the offered resources. According to a second embodiment, the exchanging resource controlling information is initiated by the second mobile transceiver, e.g. using a request, such that the first mobile transceiver can, if it has available (unused) resources, grant the respective portion of its resources.
Embodiments of the present invention are based on the principle that two mobile transceivers having resources (e.g. allocated as above discussed modes) can share its resources, when the user whose resources are not fully consumed lend some of its resources to the other user who is in the more need and has scarce resources. Thus, the idea is to grant unused resources from one entity (donor) to the resource requesting entity (take-up) by informing the taker about its free resources. In one of the embodiment, a sidelink control information (SCI) can be used. According to another embodiment, the donor users may announce their unused resources on a broadcast message. It is up to the taker user to announce capturing the donated resources on a dedicated shared channel. This basic idea enables to redistribute or reallocate resources from one use to another user, so that both user demands are fulfilled in a better way compared to the starting resource allocation. The main advantage is to notify on a very short term basis other UEs sharing resources on resource pools to keep the resources (in the notification) clear. Furthermore, any high priority/emergency message can be transmitted grant-free (very low latency) with high reliability as other UEs were prevented from using the indicated resources.
According to an embodiment, the announcing of a resource block may be performed in frequency or in time, such that the taker can use the frequency band or time frame (sub-frame bracket) of the unused resources granted for the donor, e.g. without further communication need if the donor has announced the resources. For example, the announced resources can be on dedicated resources, preconfigured resources and/or exceptional dedicated pools. The usage of the preconfigured (grant-free) resources allow beneficially better utilization and efficient sharing.
As it is discussed above, there are two substantially different embodiments, namely one embodiment according to which the first mobile transceiver uses a resource offering message to start exchanging resource controlling information and a second embodiment according to which the second mobile transceiver uses a resource request message to initiate their exchanging of resource controlling information.
In the first embodiment, the method may, according to embodiments, be performed as follows. Exchanging resource controlling information comprises the sub-step of offering the portion to the second mobile transceiver. Here, broadcasting or transmitting a resource offering message is used. Furthermore, the method may optionally additionally comprise the sub-step according to which the second mobile transceiver uses the offered portion. According to embodiments, the resource offering message comprises information regarding the resources to be shared (granted/offered), e.g. a time and/or frequency information, which is broadcasted so as to enable the taker to directly use the portion. This message is eventually sent on the next preconfigured (unwanted) grants on the shared resources.
Starting from the second embodiment, according to which the resources are offered by the first mobile transceiver, the method may according to embodiments be performed as following: The step of exchanging resource controlling information comprises the sub-step of requesting resources, wherein the corresponding resource request message is transmitted or broadcasted by the second mobile transceiver. Here, this method may optionally/additionally comprise the step of granting performed by the first mobile transceiver, by transmitting a resource grant message. Advantageously, sharing without sensing will reduce complexity. The same algorithm can be used for coexistence in autonomous mode to reduce interference. Both implementations of this second embodiments have in common that based on directing a priori knowledge from the taker user to the donor user showing the intention of sharing, the granting/using is performed. The priori knowledge is, for example, exchanged between the mobile transceivers/user equipment/vehicles via a sidelink control information (SCI) sharing dedicated sharing requests and dedicated sharing responses. Here, it should be noted that the messages can be exchanged using unicasting, multicasting or broadcasting.
Regarding the granting, it should be noted that according to embodiments, the method further comprises a step of informing the transceiver regarding an announced resource block (in frequency or in time, a frame or a subframe) corresponding to the grant portion to be shared (with the second mobile transceiver. This information, may, according to embodiments, be transmitted to the transceiver via a control channel, a data message or a combination of both. In response, the transceiver may, according to embodiments, control the resource allocation or provides the resources in accordance with the announced resource block. Using other words, these steps can be summed up in that the resources to be shared are announced in a control and/or data message allowing all recipients (of the demanding “taker” users) to access the allowed resources. Thus, the base station is reported about the autonomous modes, activities and the grant mechanism between user (general reporting sharing activity to the eNB/gNB). According to embodiments, the eNB/gNB can as response to the reporting, provide sharing limitations for the mobile transceivers.
According to embodiments, the communication system may comprise a third mobile transceiver, e.g. one requiring more resources or one having resources to be shared/granted/offered. For example, in case of two donors, the method may comprise the following steps: iteratively requesting resources performed by the second mobile transceiver and granting a further portion of third resources from the third mobile transceiver. Here, the granting is performed by the third mobile transceiver itself. Starting from two taker users, the donor user (first mobile transceiver) may perform a prioritization. This step of prioritization may be based on a QoS level information or an RSSI information of the second and third mobile transceiver. For example, a granting is denied for the mobile transceiver having a lower priority. The priority between two taker users can, according to embodiments, be performed as following. The first mobile transceiver accepts a request from a first mobile transceiver, if its RSSI value is lower than the RSSI value of a request of a second mobile transceiver. In case, both taker mobile transceivers have the same priority level or a low priority level, the resources may be granted to both to enable a coexistence. This entire approach increases the reliability based on priority selection by donor user and the demanding taker user. Expressed in other words, this prioritization may be described as selecting granted resources and resource sharing algorithms and matching user of the modes and QoS. According to embodiments, the first mobile transceiver grants the resources, if the first mobile transceiver and second mobile transceiver have different QoS levels or if the second mobile transceiver has a higher QoS level than the first mobile transceiver. This enables that donor users may prioritize their own transmission compared to the demanding taker user. To enable this prioritization the step of exchanging resource controlling information can according to embodiments comprise exchanging information regarding QoS level information or RSSI information.
According to another embodiment, the power level can be used to ensure that just mobile transceivers in proper proximity (distance defined according to the power level) to each other share their resources. This helps to keep the signal to noise ratio quite low. This may be realized, for example, when the radio frequency used for exchanging resource controlling information has a controlled power (to enable the resource sharing from mobile transceivers in proper proximity and disable resource sharing from mobile transceivers quite close or extremely far away). Here, the first mobile transceiver may, according to embodiments, analyze in parallel of the requesting a power level of the request, e.g. the resource request message.
According to embodiments, the power of the taker can be limited, what enables it for the first mobile transceiver (donor) to use the already granted portion by itself, when it increases the transmit power level to a level higher than the transmit parallel of the taker mobile transceiver. Another option for taking back already granted resources is the usage of a toggling mechanism. Such a toggling mechanism allows layer 1 (e.g. SCI) signaling to activate and deactivate sharing on one or multiple transmit occations. Thus, according to embodiments, the granted resources or a granted frame of the granted resources comprise a toggling subframe enabling to activate or deactivate the resource sharing. Due to such a mechanism, the resource sharing can be activated and deactivated during normal operation, without the need for timeouts. According to further embodiments, the power of the requesting token and the power of the granted token can be adapted to the discovered UEs. Another embodiment discusses a common power scheme (staggered power steps) selecting the transmission power. The power can also be a function of QoS.
According to the above described approach of embodiment 2 (sharing is initiated by the requester), the taker user sends the request to multiple UEs in the proximity. If the message is not decodable by the donor, then the request is neglected. This enables to ensure that just users in the proper proximity can start the resource sharing. In order to avoid that none donor transceiver in the proximity can grant resources, the taker mobile transceiver can, according to embodiments, sensing the power level and analyze the traffic between the transceiver and the first transceiver.
The above described methods have been described from the point of view of the system. Since for most of the method steps is clear which entity performs this, the above given definition of the features also refer to a method which is performed during the resource sharing by one entity, e.g. by the donor or the taker UE. An embodiment provides a method for offering resources (donor) within the discussed communication system. The method comprises the step of exchanging resource controlling information comprising the sub-steps of offering the portion to a second mobile transceiver. Here, the offering is performed by the first mobile transceiver, e.g. by unicasting and/or multicasting and/or broadcasting a resource offering message, such that the second mobile transceiver can use the offered portion. Additionally or optionally, the first mobile transceiver can perform the granting, namely granting or offering the portion, using a resource granting message such that the second mobile transceiver can use the offered portion. Vice versa, another embodiment provides a method for using/requesting resources (taker) within the discussed communication system. The method comprises exchanging resource controlling information comprising the sub-step of requesting resources. This step is performed by the second mobile transceiver by unicasting and/or multicasting and/or broadcasting a resource request message such that the first mobile transceiver can grant the portion for the second mobile transceiver. Here, additionally or optionally, the second mobile transceiver can use as additional step the offered granted portion. Alternatively, the method my just comprise the step of receiving the exchanging resource controlling information comprising an offer of the first mobile transceiver and using the offered portion/resources.
The above defined principles may be used if the mobile transceivers or at least the first or second mobile transceiver are out of coverage of the base station. In such a case preconfigured resources may be shared. Thus, embodiments refer to a method for managing/sharing preconfigured resources and to the corresponding transceivers and the resulting system enabling to manage/share resources according to the above described principles. Vice versa, it is not necessary that the first UE shares the resources from the transceiver. In consequence the first resources or the portion are according to embodiments resources provides by a transceiver or a base station, or according to further embodiments preconfigured resources or preconfigured resources mapped to the geographical zone or to the mode. Note, the tacker UE may use a preconfigured resources for exchanging resource managing control information.
Another embodiment provides a method for managing resources within a communication system. This method has the basic step of exchanging resource controlling between the first and the second mobile transceivers using a toggling sub-frame or a toggling control frame to manage the resources.
All of the above discussed methods or steps of the methods may be performed using a computer program. Therefore, another embodiment provides a computer program having a program code for performing, when the computer one of the above methods or at least one of the above discussed method steps.
Another embodiment provides a first transceiver, which is configured to exchange resource controlling information (by offering their portion using unicasting and/or multicasting and/or broadcasting a resource offering message). Here, the first mobile transceiver may also be configured to grant the offered portion.
Another embodiment provides the second mobile transceiver which is configured to exchange resource controlling information by requesting resources or to receive the exchange resource controlling information comprising an offer of resources. Here, the second mobile transceiver may be configured to use the offered or requested portion with or without granting.
Note both UEs, either taker or donor can be operated with a distributed MAC resource allocation, i.e. as in Mode 3 LTE or mode 4—like NR operation or can both operate with centralized MAC mechanism, i.e. as in Mode 3 LTE or Mode 4—like NR operation.
Another embodiment provides a communication system comprising the three entities transceiver, first mobile transceiver and second mobile transceiver.
Embodiments of the present invention will be detailed subsequently referring to the appended drawings, in which:
Below, embodiments of the present invention will subsequently be discussed referring to the enclosed Figures. Here, identical reference numbers are provided to objects having similar or identical function, so that the description thereof is mutually applicable and interchangeable.
It should be noted that the communication system 10 can be a cellular communication system enabling data exchange between the base station 12 and V2X/D2D sidelink users. Here, a centralized resource allocation mode (Mode 3—like) and distributed resource allocation mode (Mode 4—like) users for V2X and D2X can be performed, such that V2X and D2X can use sidelinks (both directions). These modes are referred to as Mode-1 and Mode2 in D2D sidelinks. Note, between the same mode users with different QoS constraints the sharing of preconfigured resources is possible. In the current 3GPP specification, resource pool sharing is proposed with sensing and reporting mechanisms. Sensing itself consumes a complete period of 1000 ms, which will induce a long latency. The reporting maybe carried to the base-station via CBR messages only and this might not be enough.
Below, an improved approach for resource sharing will be discussed with respect to
According to embodiments, this mode may have the following substeps. Sharing intentions from taker-users UE are conveyed (with different steps) to one or more donor-users UEs. Taker-users UEs first start discovery and identify nearby users and, if possible, traffic utilization. Thereafter, taker UEs start announcing some donor-users UEs whose resources are the most promising (has less interference). In this case, if the nearby UEs have high traffic utilization, then taker UEs send the requesting token with a certain power values reaching out farer UEs, i.e., in order to reduce interference if donor continues to use the resources or subset of the resources. The sharing requests shall be a unicast or multicast or broadcast message depending on the scenario.
With respect to
Both embodiments have in common that between the donor transceiver 14 and the taker transceiver 16, the granting request S-SR and the granting response S-GR are exchanged on additional resource requesting sidelinks in order to enhance sharing resources among the different users 14 and 16 with the different QoS flow requirements.
As illustrated by the embodiment of
From the point of view of the donor user 16, the resource sharing of an embodiment of
Thus, both modes enable to satisfy the urgent demands of a user equipment, e.g. assume distributed MAC operation which wants to share resources from another user, e.g. Mode 3, wherein it should be noted that both user equipments, either taker or donor, can operate with distributed MAC resource allocation, i.e. as in Mode 4 LTE or Mode 4-like NR operation, or can both operate with centralized MAC mechanism, i.e. as in Mode 3 LTE or Mode 4-like NR. Note, sharing can be granted as one-shot or multiple grants with and without a period.
According to further embodiments, the donor UEs performs a prioritization selection algorithm and granting sharing resources for selected taker-user UEs via side link control information on dedicated resources for virtual granting, preconfigured data exchange resource pool, and/or exceptional/additional resource pool like or a common bandwidth part.
As discussed above, advantageously, the resource controlling information is changed using sidelinks. According to embodiments, Sharing information can be done also via Exceptional resource pool is involved in this idea, this could be as well: additional exceptional pool, extra reserved resource pool for real-time and critical messaging, and/or emergency exceptional resource pool. Yet taker-user shares information not only sent via SCI (as in the classical Rel 15 SCI extended with the sharing bits) sent over the defined pools but rather via shared resource pool (in this case it is Exceptional RP or other future ones). The main functionality of this resource pool is to be observed by intended sharing users, e.g., taker and donor-users.
Referring to
According to embodiments, Quality of service satisfaction is carried on different levels; quality of services may be referred to as 5G quality-of-services indicator (5QI). This could be:
The users who donate their resources (i.e., who are able to send grant responses) execute different algorithms to grant some resources and refuse others. If sharing is accepted based on this algorithm, the donating users are supposed to send granting token on the shared announcements resources/pools (as stated before). The grant response are transmitted with the power class of the intended users. Hence, a broadcast message may apply and simple granting key maybe specified. The key maybe decodable by every user.
Note a sidelink sharing request (S-SR) is also defined as Request to Send (RTS), while a sidelink grant response is also known as Clear to Send (CTS).
According to further embodiments, the granting policy may be designed as follows.
If the message is xored with the granting request message ID, the UE tries to decode the message first without xoring, if decodable reservation (if granted) is performed. If the message is not decodable, the UE repeats the message decoding after xoring with the message ID field. The message ID can be expanded (by repeating) to cover multiple fields in the granting message.
If the message is un-encrypted, another one or more UEs may capture the SCI information in the virtual grant-request message. Any of these UEs shall tune to transmit (contenting) on the evacuated (granted) resources.
With respect to
Thus, a sharing request is seemed to be sent over the air (OTA) on sharing/exceptional pool or a predefined set of resources. Although, it is not explicitly shown, the sharing message sent on, e.g. at t0, can be received by one or more user equipments, e.g. at t1. As illustrated by S_GR equal to rejected transmitted at t4 as response to the request at t2/t3, the UE-D 16 can also reject the resource sharing. If the received message allows sharing, the resources to be granted to the taker UE 14 (i.e. mode for UEs) can, according to embodiments be included within the response.
The transmit power for the request S-SR and eventually for S-GR, may have a limited transmit power. Limiting the transmit power enables to define the communication range and ensure not to cause interference range out of the defined range.
The UEs requesting resources shall proceed with the discovery mechanism to select the proximity UEs, i.e., if the UEs may use doing multicast or unicast of their scheduling messages. All those UEs are assumed to be active UEs, even if they are RRC idle or not connected. If the discovery mechanism results in multiple tiers of UEs surrounding the taker-user UE and, if need be, one or more requests shall be sent with dominant (maximum) reachability power (see
According to embodiments, threshold to decide whether the donor would coexist with the taker on the donated resources or not: The received scheduling request message at the donor UEs shall be compared to a defined threshold (Thr). The reason here is to encourage the donor UE to accept the grant-request message coming more from a relatively far UE. In this case, the donor UE may decide to use the donated resources, as the taker UEs are located far from their possible communication range, i.e., the sharing power should be limited in this case to avoid interference.
Preferably, granting or offering the portion is performed, if the power level is within a predefined range of thresholds if is sharing may be used: For example, UE2-T may have an RX power level within this range (above RX power of UE1-T (high power indicating too near) and below UE3-T (low power level). Further, granting or offering the portion is performed, if the power level is below a second threshold (<<Thr) if is sharing is not required. This may be valid for UE3-T. Consequently, the second threshold may smaller than the thresholds of range or may be defined by the low power level threshold of the range.
Below, an embodiment which is mainly based on the embodiment of
In the illustrated sharing activities, the donor UE starts to offer its resources for sharing using a sidelink grant response (S-GR) messages without receiving S-SR. In this case, a mode is introduced in the sharing activation message sent by the network to allow spontaneous sharing.
The S-GR is a control message (or shared data channel with controlled multiplexed within data), which may contain:
Toggling is seen as a signal to indicate whether the donor allows sharing on its resources in the next slot or not. In case toggling filed=is short indication flag (allow or do-not-allow).
The toggling may, for example, be executed as following:
According to a further embodiment, a puncturing mechanism can be used. According to this, the donor UEs have a period to donate partially or fully. The taker UEs react passively, i.e. the UE-T scans the shared resource pool for sharing. If the pool indicate the current S-GR subframe, the taker UE may only be able to capture the frames in the next transmission opportunity (as in SF 16, where UE3-D is announcing sharing). This embodiment can be summed up as following: The toggling mechanism allows signaling (e.g. using layer 1 SCI) to activate and deactivate sharing on one or more multiple transmit occasions.
According to a further embodiment, the virtually granted resources by the donor UEs may be fed back to the Base-station for further analysis. The granted resources amount or ratios are sent to the base-station to give it an indication of the sharing traffic. The base-station may receive this reporting during one of the measurement reports on the UL. Successful sharing percentage may be sent as an index quantized into 3 bits (i.e., 8 levels) indicating the successful sharing percentage quantization bits.
This feedback information can be utilized to offload the pre-configuration to the requesting modes/UEs if possible. If not, the base-station may figure out supplementary resources for the donor UEs on same or higher frequencies.
According to a further embodiment, matching users of the Modes and the QoS information is used for selecting granted resources or, in general for the resource sharing algorithm. In the following, we describe the operation of both D-UE and UE-T in V2X. Let us assume now that the UE-D is a Mode 3-like UE and the taker-user is a Mode 4-like UE, i.e., one for a network assisted resource allocation and the other for autonomous (distributed) resource allocation modes, respectively. In mode 3-like operation, the base-station configures grants for one shot transmission and pre-configures grants for grant-free access transmission (as of Rel 15 NR). In both cases, it is assumed that if a network coverage exists (via one or more base-stations), it preconfigures certain resources to handle (exchange) grant proposals from one mode and carries the returned back scheduling grants. The UE of the higher 5QI value mode is able to grant one or more UEs at a time on one or more of its costumed (preconfigured or granted) resources.
Let us assume that Mode 3 or Mode 3-like users are the users who have preconfigured or granted resources to be used mainly for a semi-persistent scheduling. Other resources can be based on one-shot resources appearing in later sub-frames (if possible according to new-radio definitions, resources can be configured in advance).
In our context: Mode 3 UE refers to: any UE of a higher priority UEs, sidelink UE with mode 3 configuration, and/or UEs with mode-3-like operation for NR design utilizing RRC connection/network connection with network-based scheduling. Mode 3 can also note as mode 1 (for sidelink non-V2X UEs).
According to a further embodiment, the QoS flow aware selection and matching mechanism may be implemented as following. This implementation will be discussed with respect to
Regarding step 116: Once the mode-3 UE identifies the shared resources (pool) it start scanning it for possible grant requests from a lower priority UEs (could be taker UE or taker UE like UE or congested donor UE or congested donor UE like UE).
If sharing is received (cf. step 100), the donor UE analyze the request and identifies if they should accept the sharing requests or reject it for the time being. If the UE accept the sharing and if the RSSI received is less than a threshold (predefined), the low priority UEs are allowed to coexist.
If the RSSI is high, (cf. step 122 and 124), and the donor UE is owning a redundant resources, then it decides to share without coexistence (the UE donor UE decides to forbid transmission on shared resources).
Once, the donor UE is accepting the sharing (cf. step 126a or 126c), the donor UE UE sends sharing acceptance short data with short P(U/S)CCH (or long if not possible) containing the resource allocation that has be accepted to be shared. The donor UE UEs only send the time offset, starting PRB and the length of PRBs. If the UE will grant a complete SPS or preconfigured period, the period has to be added as well.
As indicated by step 130, the message is sent as a unicast (for a single UE), multi-case (for multiple granted UEs), or broadcast if unicast and multicast are not possible. The step 130 is the last step of the method 100 as indicated by the end point 132.
Regarding the method 100 it should be noted that there are some optional steps, like 112, 114, 116, 122, and 124.
Below, the sequence of operations the taker user equipment will be discussed with respect to
Within the step 210, the UE scans the SIB for sharing configuration, if identified then:
Within the step 230, the grant request on the preconfigured resource for message exchange defined before is summed. After sending the grant, the requesting UE starts the timer T_timer_grant_response (cf. 231).
If the timer T_timer_grant_response did not expire:
Otherwise, if timer expiry:
With respect to
Power of requesting message: based on the discovery mechanism, transmission the requests from taker UEs might be selected from multiple power levels. If discovery information is not available, the maximum power level should be selected in this case. The UE may stick the power levels (2 (4 levels) or 3 (8-levels) bits) identifying the power control value to the donor UEs. This value can be used to decide on the Thr of the received S-SR.
Power of the message response: If the donor UE is receiving a requesting for sharing message, and if the power level can be decoded then the donor sends the grant response using the same power value or higher. If the donor UE is not able to decode the power control, the maximum power will be used to send the grant response.
Sharing the donor resource pool: Depending on the results from the threshold check in Marker (A) (
According to embodiments, it is suggested that the UE-D announce or inform the BS of the donated resources. If the donor UE receives a specific S-SR, the donor UE shall inform the BS with the possible activity on the donated resources. This information may be provided using a specific control channel or a conventional data channel.
According to further embodiments, the BS shall deactivate the sharing mechanism on some resources (selected resources) or all resources if traffic is high or sharing resources regularities is not assured. According to further embodiments, the UE-D may announce the selected UE 5 QI/QoS.
According to embodiments, the BS shall also indicate in the RRC message a minimum acceptable sharing 5QI/CQI. In this case, in the first mechanism (sharing requests and grants), the UE-D will accept UE-T of high or equal the minimum 5QI/CQI. In the other mechanism (grant-requests only by UE-D), only UE-T with the minimum 5QI and higher can start sharing the announced resources.
In above embodiments, the invention has been mainly discussed in connection with general mobile transceivers. Preferred applications are V2X, D2D, mMTC, URLLC, critical communication. Further applications are high traffic scenario for V2X, with some/few/single UEs requesting resources to transmit high priority data (e.g. due to unexpected breaking of preceding vehicle(s) or an accident, while other UE(s) in proximity do not (urgently) need the already granted resources.
Further embodiments refer to a mobile device, like mobile phone or a vehicle using the above described mechanism of resource sharing. According to a first embodiment, the transceiver of the device can initiate the resource sharing with a request, if the transceiver may use more resources. According to a second embodiment, the transceiver can initiate the resource sharing by offering resources, if same has an portion.
In above embodiments, the step of exchanging resource controlling information should be understood as one-way communication (e.g. if the donor UE offers resources without the need for an feedback or request) and as two-way communication (e.g. request by UE-T and offering/granting by UE-D as response to the request).
Although some aspects have been described in the context of an apparatus, it is clear that these aspects also represent a description of the corresponding method, where a block or device corresponds to a method step or a feature of a method step. Analogously, aspects described in the context of a method step also represent a description of a corresponding block or item or feature of a corresponding apparatus. Some or all of the method steps may be executed by (or using) a hardware apparatus, like for example, a microprocessor, a programmable computer or an electronic circuit. In some embodiments, some one or more of the most important method steps may be executed by such an apparatus.
Depending on certain implementation requirements, embodiments of the invention can be implemented in hardware or in software. The implementation can be performed using a digital storage medium, for example a floppy disk, a DVD, a Blu-Ray, a CD, a ROM, a PROM, an EPROM, an EEPROM or a FLASH memory, having electronically readable control signals stored thereon, which cooperate (or are capable of cooperating) with a programmable computer system such that the respective method is performed. Therefore, the digital storage medium may be computer readable.
Some embodiments according to the invention comprise a data carrier having electronically readable control signals, which are capable of cooperating with a programmable computer system, such that one of the methods described herein is performed.
Generally, embodiments of the present invention can be implemented as a computer program product with a program code, the program code being operative for performing one of the methods when the computer program product runs on a computer. The program code may for example be stored on a machine readable carrier.
Other embodiments comprise the computer program for performing one of the methods described herein, stored on a machine readable carrier.
In other words, an embodiment of the inventive method is, therefore, a computer program having a program code for performing one of the methods described herein, when the computer program runs on a computer.
A further embodiment of the inventive methods is, therefore, a data carrier (or a digital storage medium, or a computer-readable medium) comprising, recorded thereon, the computer program for performing one of the methods described herein. The data carrier, the digital storage medium or the recorded medium are typically tangible and/or non-transitionary.
A further embodiment of the inventive method is, therefore, a data stream or a sequence of signals representing the computer program for performing one of the methods described herein. The data stream or the sequence of signals may for example be configured to be transferred via a data communication connection, for example via the Internet.
A further embodiment comprises a processing means, for example a computer, or a programmable logic device, configured to or adapted to perform one of the methods described herein.
A further embodiment comprises a computer having installed thereon the computer program for performing one of the methods described herein.
A further embodiment according to the invention comprises an apparatus or a system configured to transfer (for example, electronically or optically) a computer program for performing one of the methods described herein to a receiver. The receiver may, for example, be a computer, a mobile device, a memory device or the like. The apparatus or system may, for example, comprise a file server for transferring the computer program to the receiver.
In some embodiments, a programmable logic device (for example a field programmable gate array) may be used to perform some or all of the functionalities of the methods described herein. In some embodiments, a field programmable gate array may cooperate with a microprocessor in order to perform one of the methods described herein. Generally, the methods may be performed by any hardware apparatus.
While this invention has been described in terms of several embodiments, there are alterations, permutations, and equivalents which fall within the scope of this invention. It should also be noted that there are many alternative ways of implementing the methods and compositions of the present invention. It is therefore intended that the following appended claims be interpreted as including all such alterations, permutations and equivalents as fall within the true spirit and scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 18197004.7 | Sep 2018 | EP | regional |
This application is a continuation of copending International Application No. PCT/EP2019/075934, filed Sep. 25, 2019, which is incorporated herein by reference in its entirety, and additionally claims priority from European Application No. EP 18 197 004.7, filed Sep. 26, 2018, which is incorporated herein by reference in its entirety. Embodiments of the present invention refer to a method for managing, e.g. sharing resources and to a corresponding communication system. Further embodiments refer to a first mobile transceiver belonging to a communication system, wherein the first mobile transceiver is configured to offering an portion of its resources to be shared/offered/granted. Further embodiments refer to a second mobile transceiver belonging to a communication system, wherein the second mobile transceiver is configured to request resources. A further embodiment refers to a user equipment or a vehicle comprising one of the mobile transceivers.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/EP2019/075934 | Sep 2019 | US |
| Child | 17212773 | US |
