Latency and reliability improvements for sidelink service
A resource may be monitored and decoded by sidelink user equipment device, according to a configuration, to receive a portion of a sidelink traffic flow without the resource being scheduled via a control channel. The configured resource may be semi-static insofar as it may occur grant-free instead of being scheduled, but the configuration for using the semi-static resource, as well as the resource itself, may change as changes occur to members of a sidelink group of which the user equipment is a member. A sidelink search space may be used to indicate, with an SCI, traffic destined to a member in the configured grant-free resource.
1. A method, comprising:
receiving, by a user equipment, comprising at least one processor, of multiple user equipment of a wireless sidelink communication zone group authorized to connect to network service via a long-range communication network, semi-static sidelink data resource configuration information that is usable to configure the user equipment to obtain data using at least one semi-static sidelink data resource;
storing, by the user equipment, the semi-static sidelink data resource configuration information for use in obtaining the data;
receiving, by the user equipment, sidelink search space configuration information that is usable to configure the user equipment to search at least one sidelink search space;
monitoring, by the user equipment, the at least one sidelink search space according to the sidelink search space configuration information;
decoding, by the user equipment, the at least one sidelink search space according to the sidelink search space configuration information to result in at least one decoded sidelink search space;
determining, by the user equipment, that the at least one decoded sidelink search space comprises at least one semi-static sidelink data resource activation indication indicative that the at least one semi-static sidelink data resource comprises a portion of a payload traffic flow directed to the user equipment; and
responsive to the at least one semi-static sidelink data resource activation indication, performing, by the user equipment, a sidelink traffic operation comprising:
monitoring the at least one semi-static sidelink data resource according to the semi-static sidelink data resource configuration information,
decoding the at least one semi-static sidelink data resource according to the semi-static sidelink data resource configuration information to result in at least one decoded semi-static sidelink data resource,
retrieving the portion of payload traffic flow from the at least one decoded semi-static sidelink data resource, and
processing the portion of the payload traffic directed to the user equipment.
2. The method of claim 1 , wherein the semi-static sidelink data resource configuration information comprises timing information representative of an occasion resource, frequency information representative of a frequency resource, and periodicity information representative of a periodicity of the at least one semi-static sidelink data resource, and wherein the timing, the frequency and the periodicity define how to monitor one or more instances of the at least one semi-static sidelink data resource.
3. The method of claim 1 , wherein the semi-static sidelink data resource configuration information comprises a device-specific scrambling code for use by the user equipment to decode the at least one semi-static sidelink data resource.
4. The method of claim 3 , wherein the device-specific scrambling code comprises an orthogonal transmission scrambling code.
5. The method of claim 1 ,
wherein the at least one sidelink search space is periodically occurring;
wherein the monitoring the at least one sidelink search space comprises monitoring a first occasion of the periodically-occurring sidelink search space according to the sidelink search space configuration information;
wherein the decoding the at least one sidelink search space comprises decoding the first occasion of the periodically-occurring sidelink search space according to the sidelink search space configuration information to result in a decoded first occasion of the periodically-occurring sidelink search space;
determining, by the user equipment, that the at least one decoded sidelink search space comprises at least one semi-static sidelink data resource activation indication indicative that the at least one semi-static sidelink data resource does not comprise a portion of a payload traffic flow that is directed to the user equipment sidelink; and
skipping, by the user equipment, monitoring of a second occasion of the periodically-occurring semi-static sidelink data resource following the monitoring and the decoding of the first occasion of the static sidelink data resource.
6. The method of claim 1 , wherein the semi-static sidelink data resource activation indication comprises sidelink control information.
7. The method of claim 1 , wherein the decoding of the sidelink search space comprises blind decoding.
8. The method of claim 1 , wherein the at least one semi-static sidelink data resource comprises at least one grant-free resource.
9. The method of claim 1 , wherein the semi-static sidelink data resource configuration information is received from another user equipment of the wireless sidelink communication zone group other than the user equipment.
10. The method of claim 1 , wherein the semi-static sidelink data resource configuration information is received from a radio access network node.
11. A system, comprising:
at least one processor; and
at least one memory that stores executable instructions that, when executed by the at least one processor, facilitate performance of operations, comprising:
transmitting, to a user equipment of multiple user equipment that are part of a wireless sidelink communication zone group enabled to communicate via a long-range communication network, semi-static sidelink data resource configuration information that configures the user equipment to obtain data from a semi-static sidelink data resource;
receiving a portion of a payload traffic flow that has been directed to the user equipment;
transmitting the portion of the payload traffic flow that was directed to the user equipment during an occasion of the semi-static sidelink data resource;
transmitting sidelink search space configuration information that configures the user equipment to search a sidelink search space to obtain a semi-static sidelink data resource activation indication that indicates a member of the wireless sidelink communication zone group for which the semi-static sidelink data resource comprises the portion of the payload traffic flow;
scrambling the semi-static sidelink data resource activation indication according to a code specific to the user equipment to result in a scrambled semi-static sidelink data resource activation indication; and
transmitting the scrambled semi-static sidelink data resource activation indication in the sidelink search space, wherein the sidelink search space is transmitted before, and corresponds to, the occasion of the semi-static sidelink data resource during which the portion of the payload traffic flow directed to the user equipment is transmitted.
12. The system of claim 11 , wherein the operations further comprise scrambling the portion of the payload traffic flow that was directed to the user equipment during the occasion of the semi-static sidelink data resource according to a code specific to the user equipment.
13. The system of claim 11 , wherein the sidelink search space is transmitted as sidelink control information.
14. The system of claim 11 , wherein the sidelink search space is instantiated for a shorter duration than the semi-static sidelink data resource occasion.
15. The system of claim 11 , wherein the sidelink search space is transmitted using a smaller frequency spectrum range than is used for the transmitting of the occasion of the semi-static sidelink data resource.
16. The system of claim 11 , wherein the semi-static sidelink data resource comprises a grant-free resource.
17. A non-transitory machine-readable medium, comprising executable instructions that, when executed by at least one processor of a first user equipment of multiple user equipment that are part of a wireless sidelink communication zone group defined in connection with usage of a long-range communication network, facilitate performance of operations, comprising:
transmitting, to a second user equipment of the multiple user equipment, semi-static sidelink data resource configuration information that configures the second user equipment to obtain data using a semi-static sidelink data resource;
receiving a portion of a payload traffic flow destined to the second user equipment;
transmitting the portion of the payload traffic flow destined to the second user equipment in an occasion of the semi-static sidelink data resource;
transmitting sidelink search space configuration information that configures the second user equipment to search a sidelink search space to obtain a semi-static sidelink data resource activation indication comprising an indication of one of the multiple user equipment for which the semi-static sidelink data resource comprises the portion of the payload traffic flow;
scrambling the semi-static sidelink data resource activation indication according to a code specific to the second user equipment to result in a scrambled semi-static sidelink data resource activation indication; and
transmitting the scrambled semi-static sidelink data resource activation indication in the sidelink search space, wherein the sidelink search space is transmitted before, and corresponds to, the semi-static sidelink data resource occasion in which the portion of the payload traffic flow destined to the second user equipment is transmitted.
18. The non-transitory machine-readable medium of claim 17 , wherein the operations further comprise scrambling the portion of the payload traffic flow destined to the second user equipment in the occasion of the semi-static sidelink data resource according to a code generated to be specific to the second user equipment.
19. The non-transitory machine-readable medium of claim 17 , wherein the occasion of the semi-static sidelink data resource is maintained longer than sidelink search space.
20. The non-transitory machine-readable medium of claim 17 , wherein the sidelink search space is transmitted using a smaller frequency spectrum range than is used for the transmitting of the portion of the payload traffic flow destined to the second user equipment during the occasion of the semi-static sidelink data resource.