Distributed downlink control channel design for wireless tethered devices
An extended reality processing unit and one or more extended reality appliances may share a joint access code. The processing unit may transmit the access code and identifiers corresponding to the processing unit and the appliances to a radio access network node. The node may configure the processing unit and the appliances with respective control channel search space resources and respective scrambling codes corresponding thereto. The node may receive traffic directed to one of the appliances. If transmission of control channel information corresponding to the traffic would violate a latency criterion corresponding thereto, the node may puncture resources, configured for use by the processing unit, occurring during a joint search space occasion, to transmit the control channel information to the appliance. The node may determine a control information format that fits in remnant portions of the punctured joint search space occasion to deliver control information to the processing unit.
1 . A method, comprising:
facilitating, by a radio access network node comprising a processor, receiving a connection establishment message comprising a unified access code corresponding to a primary user equipment and at least one secondary user equipment associated with the primary user equipment;
facilitating, by the radio access network node, transmitting, to the primary user equipment, a downlink control channel configuration comprising at least one scrambling code usable by the primary user equipment and the at least one secondary user equipment to decode at least one downlink control channel resource indicated in the downlink control channel configuration,
wherein the at least one downlink control channel resource comprises a first downlink control channel resource and a second downlink control channel resource, and wherein the method further comprises:
facilitating, by the radio access network node via the second downlink control channel resource, transmitting a puncturing indication indicative that the second downlink control channel resource is to be punctured to result in a punctured second downlink control channel resource and a remnant second downlink control channel resource; and
facilitating, by the radio access network node via the punctured second downlink control channel resource, transmitting downlink control channel information directed to at least one of the at least one secondary user equipment.
2 . The method of claim 1 , further comprising:
facilitating, by the radio access network node, transmitting, to the at least one secondary user equipment, the downlink control channel configuration.
3 . The method of claim 1 , wherein the at least one scrambling code comprises a first scrambling code and a second scrambling code corresponding, respectively, to the first downlink control channel resource and the second downlink control channel resource, and wherein the first scrambling code is usable by the primary user equipment and the at least one secondary user equipment to decode the first downlink control channel resource.
4 . The method of claim 1 , wherein the puncturing indication comprises an indication that the second downlink control channel resource is to be punctured by the first downlink control channel resource to result in the punctured second downlink control channel resource and the first downlink control channel resource being the same.
5 . The method of claim 1 , wherein the puncturing indication comprises a puncturing resource indication indicative of the punctured second downlink control channel resource.
6 . The method of claim 5 , wherein the punctured second downlink control channel resource and the first downlink control channel resource are different.
7 . The method of claim 1 , wherein the at least one scrambling code comprises a first scrambling code and a second scrambling code corresponding, respectively, to the first downlink control channel resource and the second downlink control channel resource, wherein the first scrambling code is usable by the primary user equipment and the at least one secondary user equipment to decode the first downlink control channel resource, wherein the second scrambling code is usable by the primary user equipment to decode the second downlink control channel resource, and wherein the first scrambling code is usable by the at least one of the at least one secondary user equipment to decode the punctured second downlink control channel resource.
8 . The method of claim 7 , wherein the second scrambling code is exclusively usable by the primary user equipment to decode the second downlink control channel resource.
9 . The method of claim 7 , wherein the second scrambling code is usable by the primary user equipment and the at least one secondary user equipment to decode the puncturing indication.
10 . The method of claim 1 , wherein the at least one scrambling code comprises a same scrambling code usable by the primary user equipment and the at least one secondary user equipment to decode the first downlink control channel resource and the second downlink control channel resource.
11 . The method of claim 1 , wherein the second downlink control channel resource is a next second downlink control channel resource occasion, and the method further comprising:
facilitating, by the radio access network node, receiving downlink traffic directed to the at least one of the at least one secondary user equipment; and
determining that a quality-of-service criterion corresponding to the downlink traffic will be violated as a result of transmission of downlink control information corresponding to the downlink traffic to the at least one of the at least one secondary user equipment after the next second downlink control channel resource occasion, the determining resulting in a determined potential quality-of-service criterion violation;
wherein the transmitting the puncturing indication is based on the determined potential quality-of-service criterion violation.
12 . The method of claim 1 , further comprising:
based on the remnant second downlink control channel resource, determining, by the radio access network node, a control channel message format that is able to be transmitted to the primary user equipment via the remnant second downlink control channel resource; and
facilitating, by the radio access network node, transmitting downlink control channel information directed to the primary user equipment according to the control channel message format via the remnant second downlink control channel resource.
13 . The method of claim 12 , wherein the downlink control channel information comprises first downlink control information and second downlink control information, wherein the control channel message format comprises at least one first information format segment and at least one second information format segment, wherein the remnant second downlink control channel resource comprises a first remnant portion and a second remnant portion, and wherein the first downlink control information is transmitted according to the at least one first information formant segment via the first remnant portion and the second downlink control information is transmitted according to the at least one second information format segment via the second remnant portion.
14 . A radio access network node, comprising at least one processor configured to process executable instructions that, when executed by the processor, facilitate performance of operations, comprising:
receiving a connection establishment message comprising a unified access code corresponding to an extended reality processing unit and at least one extended reality appliance associated with the extended reality processing unit;
transmitting, to the extended reality processing unit and to the at least one extended reality appliance, a downlink control channel configuration comprising at least one scrambling code usable by the extended reality processing unit and the at least one extended reality appliance to decode at least one downlink control channel resource indicated in the downlink control channel configuration;
transmitting downlink control channel information via the at least one downlink control channel resource,
wherein the at least one downlink control channel resource comprises a first downlink control channel resource and a second downlink control channel resource, and wherein the operations further comprise:
transmitting, via the second downlink control channel resource, a puncturing indication indicative that the second downlink control channel resource is to be punctured to result in a punctured second downlink control channel resource and at least one remnant second downlink control channel resource; and
transmitting, via the punctured second downlink control channel resource, downlink control channel information directed to at least one of the at least one secondary user equipment.
15 . The radio access network node of claim 14 , wherein the second downlink control channel resource to be punctured is a first second downlink control channel occasion, wherein a second second downlink control channel resource is a next second downlink control channel occasion with respect to the first second downlink control channel occasion, wherein the operations further comprise:
receiving downlink traffic directed to the at least one of the at least one secondary user equipment; and
determining that a quality-of-service criterion corresponding to the downlink traffic will be violated, resulting in a determined potential quality-of-service criterion violation, based on a determination that downlink control information corresponding to the downlink traffic will be transmitted to the at least one of the at least one secondary user equipment after the next second downlink control channel resource occasion,
wherein the puncturing indication is transmitted based on the determined potential quality-of-service criterion violation, and wherein the downlink control channel information corresponds to the downlink traffic.
16 . The radio access network node of claim 14 , wherein the operations further comprise, based on the at least one remnant second downlink control channel resource, determining at least one control channel message format that is able to be transmitted to the primary user equipment via the at least one remnant second downlink control channel resource; and
facilitating, by the radio access network node, transmitting downlink control channel information directed to the primary user equipment according to the control channel message format via the at least one remnant second downlink control channel resource.
17 . The radio access network node of claim 16 , wherein the at least one remnant second downlink control channel resource comprises a first remnant second downlink control channel resource and a second remnant second downlink control channel resource, wherein the downlink control channel information comprises at least a first downlink control channel information segment and at least a second downlink control channel information segment, wherein the first downlink control channel information segment and the a second downlink control channel information segment are transmitted via the first remnant second downlink control channel resource and the second remnant second downlink control channel resource, respectively, and wherein the first downlink control channel information segment and the a second downlink control channel information segment are combinable by the primary user equipment.
18 . A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a radio access network node, facilitate performance of operations, comprising:
receiving a connection establishment message comprising a unified access code corresponding to a primary user equipment and at least one secondary user equipment associated with the primary user equipment;
transmitting, to the primary user equipment and to the at least one secondary user equipment, a downlink control channel configuration comprising at least one scrambling code usable by the primary user equipment and the at least one secondary user equipment to decode a first downlink control channel resource and a second downlink control channel resource;
receiving downlink traffic directed to the at least one of the at least one secondary user equipment;
determining that a quality-of-service criterion corresponding to the downlink traffic is going to be violated as a result of determining that downlink control information corresponding to the downlink traffic is going to be transmitted to the at least one of the at least one secondary user equipment after a next second downlink control channel resource occasion to result in a determined potential quality-of-service criterion violation;
based on the determined potential quality-of-service criterion violation, transmitting, via the second downlink control channel resource, a puncturing indication indicative that the second downlink control channel resource is to be punctured to result in a punctured second downlink control channel resource and a remnant second downlink control channel resource; and
transmitting, via the punctured second downlink control channel resource, downlink control channel information, corresponding to the downlink traffic, directed to at least one of the at least one secondary user equipment.
19 . The non-transitory machine-readable medium of claim 18 , the operations further comprising:
based on the remnant second downlink control channel resource, determining a control channel message format that is able to be transmitted to the primary user equipment via the remnant second downlink control channel resource; and
transmitting downlink control channel information directed to the primary user equipment according to the control channel message format via the remnant second downlink control channel resource,
wherein the downlink control channel information comprises first downlink control information and second downlink control information, wherein the control channel message format comprises at least one first information format segment and at least one second information format segment, wherein the remnant second downlink control channel resource comprises a first remnant portion and a second remnant portion, and wherein the first downlink control information is transmitted according to the at least one first information format segment via the first remnant portion and the second downlink control information is transmitted according to the at least one second information formant segment via the second remnant portion.
20 . The non-transitory machine-readable medium of claim 19 , wherein the control channel message format is a revised control channel message format that is configured to accommodate less control information than a default control channel message format, wherein the second downlink control channel resource is configured to accommodate transmission of control information according to the default control channel message format, and wherein the remnant second downlink control channel resource is unable to accommodate transmission of control information according to the default control channel message format.