NR sidelink multi-control/data multiplexing
A user device, UE, for a wireless communication network is described that communicates with one or more network entities of the wireless communication network, like a base station or another UE. The UE receives from a network entity a transmission, the transmission including a control region, like a Physical Sidelink Control Channel, PSCCH, and a data region, like a Physical Sidelink Shared Channel, PSSCH. The transmission includes a first control message, like a 1 st -stage SCI, in the control region, and a second control message, like a 2 nd -stage SCI, in the data region. The second control message includes control data and occupies some or all of the resources allocated in the data region of the transmission, or is associated with control data included in at least a part of the data region of the transmission.
1 . A user device, UE, for a wireless communication network, comprising:
at least one antenna or at least one antenna array having a plurality of antenna elements;
a signal processor; and
a transceiver,
wherein the UE is to communicate with one or more network entities of the wireless communication network, like a base station or another UE,
wherein the UE is to receive from a network entity a transmission, the transmission including a control region, like a Physical Sidelink Control Channel, PSCCH, and a data region, like a Physical Sidelink Shared Channel, PSSCH,
wherein the transmission includes a first control message, like a 1 st -stage SCI, in the control region, and a second control message, like a 2 nd -stage SCI, in the data region, and
wherein the second control message
occupies some of resources allocated in the data region of the transmission and includes inter-UE coordination information and information to identify and decode data in the data region, or
occupies all of the resources allocated in the data region of the transmission and includes only inter-UE coordination information, or
occupies some of the resources allocated in the data region of the transmission and includes information to identify and decode inter-UE coordination information included in the data region of the transmission, and
wherein the inter-UE coordination information provide assistance in a form of a set of resources to be available or non-available for use by the UE.
2 . The user device, UE, of claim 1 , wherein the inter-UE coordination information comprises control information useful to the UE, the inter-UE coordination information being transmitted in the data region and being different from any payload to be transmitted in the data region.
3 . The user device, UE, of claim 1 , wherein
the first control message includes a parameter indicating a format of the second control message present in the data region, the parameter indicating that the second control message includes the inter-UE coordination information and occupies all of the resources allocated in the data region of the transmission, and
responsive to the parameter, the UE is not to expect receiving any payload data in the data region but the only inter-UE coordination information, like an assistance information message, AIM.
4 . The user device, UE, of claim 3 , wherein
the second control message includes one or more destination identifications, IDs, indicating one or more UEs to which the inter-UE coordination information in the data region of the transmission is directed, or one or more group IDs indicating one or more groups of UEs to which the inter-UE coordination information in the data region of the transmission is directed, and
the UE is to decode the inter-UE coordination information from the data region of the transmission in case the second control message includes a destination ID that matches an ID of the UE or a group ID of a group of which the UE is a member.
5 . The user device, UE, of claim 4 , wherein
the first control message includes a portion of a destination ID or a group ID, and
the UE is to determine the transmission to be relevant to the UE from the decoded first control message when the portion of the destination ID or the group ID is associated with an ID of the UE.
6 . The user device, UE, of claim 1 , wherein
the first control message includes a parameter indicating a format of the second control message present in the data region, the parameter indicating that the second control message is associated with the inter-UE coordination information included in at least a part of the data region of the transmission,
the second control message includes information to be used for decoding the inter-UE coordination information present in the data region, and
responsive to the parameter, the UE is not to expect receiving any payload data in some or all of the data region but the only inter-UE coordination information, like an AIM, and is to use the information from the second control message for decoding the inter-UE coordination information present in the data region.
7 . The user device, UE, of claim 1 ,
wherein the inter-UE coordination information in the transmission includes one or more reports or assistance information messages, AIMs, including resource allocation related assistance information,
wherein, responsive to a trigger for a transmission, the UE is to determine a candidate resource set for the transmission by selecting resources for the transmission within a selection window following the trigger, wherein the UE is to select the resources by taking into consideration sensing results obtained by the UE during a sensing window preceding the trigger, the sensing results indicating whether certain resources are available or unavailable for the transmission, and
wherein the UE considers a received report or AIM, like an AIM including sensing results, for selecting resources for the transmission.
8 . A wireless communication system, comprising:
a plurality of user devices, UEs, configured for a sidelink communication using, for example resources from a set of sidelink resources of the wireless communication system,
wherein the plurality of UEs comprises one or more UEs of claim 1 , and
wherein the plurality of UEs comprises one or more of further UEs.
9 . A user device, UE, for a wireless communication network, comprising:
at least one antenna or at least one antenna array having a plurality of antenna elements;
a signal processor; and
a transceiver,
wherein the UE is to communicate with one or more network entities of the wireless communication network, like a base station or another UE,
wherein the UE is to receive from a network entity a transmission, the transmission including a control region, like a Physical Sidelink Control Channel, PSCCH, and a data region, like a Physical Sidelink Shared Channel, PSSCH,
wherein the transmission includes a first control message, like a 1 st -stage SCI, in the control region, and a second control message, like a 2 nd -stage SCI, in the data region,
wherein the transmission includes at least one further second control message, like a further 2 nd -stage SCI, in the data region,
wherein the at least one further second control message
occupies some of resources allocated in the data region of the transmission and only includes inter-UE coordination information, or
occupies some of the resources allocated in the data region of the transmission and includes information to identify and decode inter-UE coordination information included in the data region of the transmission, and
wherein the inter-UE coordination information provide assistance in a form of a set of resources to be available or non-available for use by the UE.
10 . The user device, UE, of claim 9 , wherein the first control message includes a parameter pointing to the second control message, and wherein the second control message includes a parameter pointing to one of the at least one further second control message.
11 . The user device, UE, of claim 9 , wherein the second control message
includes inter-UE coordination information and occupies some of the resources allocated in the data region of the transmission, or
is associated with inter-UE coordination information included in at least a part of the data region of the transmission, or
is associated with payload data included in at least a part of the data region of the transmission.
12 . The user device, UE, of claim 9 , wherein the first control message
indicates a number of second control messages in the transmission associated with the first control message, and/or
includes a multi-second control message format indicator indicating a presence of and/or formats of the second control message.
13 . The user device, UE, of claim 9 , wherein the transmission comprises one or more MAC elements, like a MAC PDU or a MAC header, indicating one or more UEs or one or more groups of UEs to which the inter-UE coordination information in the data region of the transmission is directed, and
the UE is to decode from the data region of the transmission the inter-UE coordination information indicated by the MAC header to be directed to the UE.
14 . The user device, UE, of claim 9 , wherein
a CRC of the second control message and/or a further second control message is scrambled with one or more destination identifications, IDs, indicating one or more UEs to which the inter-UE coordination information in the data region of the transmission is directed, or one or more group IDs indicating one or more groups of UEs to which the inter-UE coordination information in the data region of the transmission is directed, and/or
the UE is to blindly decode the data region to obtain the inter-UE coordination information from the data region of the transmission that is relevant for the UE.
15 . The user device, UE, of claim 9 , wherein
the UE is configured or pre-configured with at least one transmission map for the data region of the transmission, the at least one transmission map indicating a plurality of parts of the data region, each part associated with one or more UEs or one or more groups of UEs to which the inter-UE coordination information in that part of the data region of the transmission is processed, and
the UE is to attempt to decode parts of the data region of the transmission associated with the UE.
16 . The user device, UE, of claim 9 , wherein the second control message and/or a further second control message use one or more first aggregation levels being different from a second aggregation level used by a second control message, the one or more first aggregation levels being same or different dependent on a nature of control messages or channel conditions between a source network entity sending the transmission and the UE.
17 . The user device, UE, of claim 9 , wherein the second control message and each further second control message include at least one following parameter:
an index ID,
a type of the inter-UE coordination information,
a cast type for which the inter-UE coordination information is relevant,
a duration for which the inter-UE coordination information is valid, like an expiry timer,
a destination ID,
a resource pool ID within which the inter-UE coordination information is relevant,
a priority associated with the inter-UE coordination information,
an indication that the transmission in the data region contains the inter-UE coordination information, or payload data, or both,
a time resource indicator value,
a frequency resource indicator value,
a zone ID indicating a geographical location or any other reference to a location of the UE,
a minimum communication range within which the UE needs to be with respect to a source network entity.
18 . A method for operating a user device, UE, of a wireless communication network, the UE communicating with one or more network entities of the wireless communication network, like a base station or another UE, the method comprising:
receiving from a network entity a transmission, the transmission including a control region, like a Physical Sidelink Control Channel, PSCCH, and a data region, like a Physical Sidelink Shared Channel, PSSCH,
wherein the transmission includes a first control message, like a 1 st -stage SCI, in the control region, and a second control message, like a 2 nd -stage SCI, in the data region, and
wherein the second control message
occupies some of resources allocated in the data region of the transmission and includes inter-UE coordination information and information to identify and decode data in the data region, or
occupies all of the resources allocated in the data region of the transmission and includes only inter-UE coordination information, or
occupies some of the resources allocated in the data region of the transmission and includes information to identify and decode inter-UE coordination information included in the data region of the transmission, and
wherein the inter-UE coordination information provide assistance in a form of a set of resources to be available or non-available for use by the UE.
19 . A method for operating a user device, UE, of a wireless communication network, the UE communicating with one or more network entities of the wireless communication network, like a base station or another UE, the method comprising:
receiving from a network entity a transmission, the transmission including a control region, like a Physical Sidelink Control Channel, PSCCH, and a data region, like a Physical Sidelink Shared Channel, PSSCH,
wherein the transmission includes a first control message, like a 1 st -stage SCI, in the control region, and a second control message, like a 2 nd -stage SCI, in the data region, and
wherein the transmission includes at least one further second control message, like a further 2 nd -stage SCI, in the data region,
wherein the at least one further second control message
occupies some of resources allocated in the data region of the transmission and only includes inter-UE coordination information, or
occupies some of the resources allocated in the data region of the transmission and includes information to identify and decode inter-UE coordination information included in the data region of the transmission, and
wherein the inter-UE coordination information provide assistance in a form of a set of resources to be available or non-available for use by the UE.