Sidelink control channel sensing
Sidelink relay and remote sidelink devices of a sidelink group negotiate a distributed sidelink control channel sensing arrangement such that one sidelink device monitors control channel sensing occasions during a configured sensing period corresponding to the monitoring sielink device while other members of the group sleep their respective control channel sensing circuitry. More than one member of the group may be awake during a configured channel sensing reporting occasion that is used to communicate available channel resource reports among group members. A report may be unicast, multicast, or broadcast, and may be transmitted in a SCI. Group members may be configured to transmit or receive an interruption request that requests by a non-sensing member a partial available channel resource report from a group member that is currently sensing. The partial report may be transmitted before the configured reporting occasion.
1 . A method, comprising:
in a wireless communication network comprising user equipment members of a wireless sidelink communication zone group, negotiating, by one or more members of the wireless sidelink communication zone group, a shared sidelink control channel sensing scheme, wherein the shared sidelink control channel sensing scheme comprises member-specific sensing periods corresponding to the user equipment group members;
decoding, by a first member of the wireless sidelink communication zone group and according to the shared sidelink control channel sensing scheme, sensing instants during a member-specific sensing period that corresponds to the first member, the decoding resulting in decoded sensing instants;
determining, from the decoded sensing instants and with the first member, indications of occupied sidelink channel resources that are reserved for use by the one or more members of the wireless sidelink communication zone group for transmission of a sidelink payload and indications of available sidelink channel resources that are available for the transmission of the sidelink payload by the user equipment members of the wireless sidelink communication zone group; and
transmitting, by the first member, an available channel resource report during a configured available channel resource report occasion,
wherein one or more other members of the wireless sidelink communication zone group, other than the first member, are in a deep sleep state during the member-specific sensing period that corresponds to the first member, and wherein the available channel resource report occasion occurs outside of one or more sensing periods that correspond to the one or more other members of the wireless sidelink communication zone group.
2 . The method of claim 1 , further comprising transmitting, with the first member, payload data corresponding to the first member using an available sidelink channel resource.
3 . The method of claim 1 , wherein ones of the user equipment members of the wireless sidelink communication zone group other than the first member are in an inactive mode during the member-specific sensing period corresponding to the first member.
4 . The method of claim 1 , wherein the shared sidelink control channel sensing scheme comprises the configured available channel resource report occasion.
5 . The method of claim 1 , further comprising transmitting, with the first member, an available channel resource report as payload data of a sidelink transmission.
6 . The method of claim 1 , further comprising receiving, with the first member, a request from a second member for an available sidelink channel resource report during the member-specific sensing period corresponding to the first member.
7 . The method of claim 6 , further comprising transmitting, with the first member, the available channel resource report as payload data of a sidelink transmission.
8 . The method of claim 1 , further comprising entering an inactive mode by the first member upon an expiration of the member-specific sensing period that corresponds to the first member.
9 . The method of claim 1 , wherein the negotiation is based on at least one battery charge level corresponding to at least one of the one or more members of the wireless sidelink communication zone group.
10 . A sensing user equipment, comprising:
a processor to:
negotiate, with one or more user equipment of a group of user equipment, a shared sidelink control channel sensing protocol, wherein the shared sidelink control channel sensing protocol comprises member-specific sensing periods corresponding to user equipment of the group of user equipment;
decode, according to the shared sidelink control channel sensing protocol, sensing instants during a user equipment-specific sensing period that corresponds to the sensing user equipment to result in decoded sensing instants;
determine, from the decoded sensing instants, indications of occupied sidelink channel resources that are reserved for use, by the one or more user equipment of the group, to transmit a sidelink payload and indications of available sidelink channel resources that are available for use to transmit the sidelink payload by the group of user equipment; and
transmit an available channel resource report during a configured available channel resource report occasion,
wherein other user equipment of the group of user equipment, other than the sensing user equipment, are in an inactive mode during the member-specific sensing period that corresponds to the sensing user equipment member, and wherein the available channel resource report occasion does not occur during periods that correspond to the other user equipment of the group of user equipment.
11 . The sensing user equipment of claim 10 , wherein the processor is further configured to transmit payload data corresponding to the sensing user equipment using an available sidelink channel resource.
12 . The sensing user equipment of claim 10 , wherein the shared sidelink control channel sensing protocol comprises the configured available channel resource report occasion.
13 . The sensing user equipment of claim 10 , wherein the processor is further configured to transmit an available channel resource report as payload data of a sidelink transmission.
14 . The sensing user equipment of claim 10 , wherein the shared sidelink control channel sensing protocol comprises a configured available channel resource report occasion, wherein the sensing user equipment is a first user equipment, and wherein the processor is further configured to:
receive a request from a second user equipment for an available sidelink channel resource report during the user equipment-specific sensing period corresponding to the first user equipment.
15 . The sensing user equipment of claim 10 , wherein the shared sidelink control channel sensing protocol negotiation is based on at least one battery charge level corresponding to at least one of the user equipment of the group of user equipment.
16 . A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a first user equipment of a wireless sidelink communication zone group of user equipment in a wireless communication network, facilitate performance of operations, comprising:
negotiating, with at least one user equipment of the wireless sidelink communication zone group, a shared sidelink control channel sensing procedure, wherein the shared sidelink control channel sensing procedure comprises implementing user equipment-specific sensing periods corresponding to the wireless sidelink communication zone group of user equipment;
decoding, according to the shared sidelink control channel sensing procedure, sensing instants during a user equipment-specific sensing period that corresponds to the first user equipment to result in decoded sensing instants;
determining, from the decoded sensing instants, indications of occupied sidelink channel resources that are reserved for use by the at least one user equipment of the wireless sidelink communication zone group for transmitting a sidelink payload and indications of available sidelink channel resources that are available for transmitting the sidelink payload by the user equipment of the wireless sidelink communication zone group; and
transmitting an available channel resource report during a configured available channel resource report occasion,
wherein other user equipment of the wireless sidelink communication zone group, other than the first user equipment, are in a deep sleep mode during the user equipment-specific sensing period that corresponds to the sensing user equipment member, and wherein the available channel resource report occasion does not occur during periods that correspond to the other user equipment of the wireless sidelink communication zone group.
17 . The non-transitory machine-readable medium of claim 16 , wherein the operations further comprise sleeping, during another user equipment-specific sensing period corresponding to another user equipment of the wireless sidelink communication zone group other than the first user equipment.
18 . The non-transitory machine-readable medium of claim 16 , wherein the shared sidelink control channel sensing procedure comprises the configured available channel resource report occasion.
19 . The non-transitory machine-readable medium of claim 16 , wherein the operations further comprise receiving, with the first user equipment, a request from a second user equipment for an available sidelink channel resource report during the user equipment-specific sensing period corresponding to the first user equipment.
20 . The non-transitory machine-readable medium of claim 16 , wherein the shared sidelink control channel sensing procedure is based on at least one battery charge level corresponding to at least one of the user equipment of the group of user equipment.