METHOD AND DEVICE USED FOR WIRELESS COMMUNICATION
A method and a device used for wireless communications. A first node receives a first radio signal, and decodes the first radio signal for obtaining at least one MAC SDU, any MAC SDU of the at least one MAC SDU belonging to a target logical channel set; and determines whether to initialize a first timer according to whether the at least one MAC SDU belongs to a given logical channel set, specifically comprising: if any of the at least one MAC SDU belongs to the given logical channel set, initializing the first timer; if none of the at least one MAC SDU belongs to the given logical channel set, not initializing the first timer; herein, the first radio signal is scrambled by a non-unicast RNTI; any logical channel in the target logical channel set is used for multicast MBS. This application helps greatly reduce the UE power consumption.
1 . A first node for wireless communications, comprising:
a first receiver, receiving a first radio signal, and decoding the first radio signal for obtaining a first MAC PDU, the first MAC PDU comprising at least one MAC SDU, any MAC SDU of the at least one MAC SDU belonging to a target logical channel set, the target logical channel set comprising at least one logical channel; and
a first processor, determining whether to initialize a first timer according to whether the at least one MAC SDU belongs to a given logical channel set, the given logical channel set being a subset of the target logical channel set;
wherein the first radio signal is scrambled by a non-unicast Radio Network Temporary Identifier (RNTI); the action of determining whether to initialize a first timer according to whether the at least one MAC SDU belongs to a given logical channel set comprises: if any of the at least one MAC SDU belongs to the given logical channel set, initializing the first timer; if none of the at least one MAC SDU belongs to the given logical channel set, not initializing the first timer; any logical channel in the target logical channel set is used for multicast MBS; any logical channel in the given logical channel set is used for an interested MBS session of the first node.
2 . The first node according to claim 1 , wherein the first node is in an RRC state other than RRC-Idle.
3 . The first node according to claim 1 , comprising:
the first processor, as a response to expiration of the first timer, conveying a first indication to an upper layer from a MAC sublayer;
wherein the first timer is maintained in the MAC sublayer.
4 . The first node according to claim 3 , wherein the first indication is used for triggering a transition of RRC state of the first node.
5 . The first node according to claim 3 , wherein when the first node is in an RRC Inactive state and an upper layer of the first node receives the first indication from a lower layer of the first node, the first node determines whether to transit to another RRC state depending on whether a Small Data Transmission (SDT) procedure is ongoing; wherein when the first node is in the SDT procedure, do not transit to another RRC state; when the first node is not in the SDT procedure, transit to an RRC Idle state.
6 . The first node according to claim 3 , wherein when the first node is in an RRC Inactive state and an upper layer of the first node receives the first indication from a lower layer of the first node, the first node determines whether to transit to another RRC state depending on whether a second timer is running; wherein when the second timer is running, do not transit to another RRC state; when the second timer is not running, transit to an RRC Idle state.
7 . The first node according to claim 1 , comprising:
the first receiver, receiving a first message, the first message indicating at least one multicast MBS Radio Bearer (MRB);
wherein each multicast MRB of the at least one multicast MRB is associated with an interested MBS session of the first node.
8 . The first node according to claim 7 , comprising:
the first receiver, receiving a second message, the second message indicating at least one logical channel;
wherein each logical channel of the at least one logical channel is associated with a multicast MRB of the at least one multicast MRB; the at least one logical channel belongs to the given logical channel set.
9 . The first node according to claim 1 , wherein the non-unicast RNTI is a G-RNTI, or a G-CS-RNTI.
10 . The first node according to claim 1 , wherein a logical channel that belongs to the target logical channel set but does not belong to the given logical channel set is not configured for the first node;
wherein at least one logical channel comprised in the target logical channel set does not belong to the given logical channel set.
11 . A method in a first node for wireless communications, comprising:
receiving a first radio signal, and decoding the first radio signal for obtaining a first MAC PDU, the first MAC PDU comprising at least one MAC SDU, any MAC SDU of the at least one MAC SDU belonging to a target logical channel set, the target logical channel set comprising at least one logical channel; and
determining whether to initialize a first timer according to whether the at least one MAC SDU belongs to a given logical channel set, the given logical channel set being a subset of the target logical channel set;
wherein the first radio signal is scrambled by a non-unicast RNTI; the action of determining whether to initialize a first timer according to whether the at least one MAC SDU belongs to a given logical channel set comprises: if any of the at least one MAC SDU belongs to the given logical channel set, initializing the first timer; if none of the at least one MAC SDU belongs to the given logical channel set, not initializing the first timer; any logical channel in the target logical channel set is used for multicast MBS; any logical channel in the given logical channel set is used for an interested MBS session of the first node.
12 . The method in the first node according to claim 11 , wherein the first node is in an RRC state other than RRC-Idle.
13 . The method in the first node according to claim 11 , comprising:
as a response to expiration of the first timer, conveying a first indication to an upper layer from a MAC sublayer;
wherein the first timer is maintained in the MAC sublayer.
14 . The method in the first node according to claim 13 , wherein the first indication is used for triggering a transition of RRC state of the first node.
15 . The method in the first node according to claim 13 , wherein when the first node is in an RRC Inactive state and an upper layer of the first node receives the first indication from a lower layer of the first node, the first node determines whether to transit to another RRC state depending on whether a Small Data Transmission (SDT) procedure is ongoing; wherein when the first node is in the SDT procedure, do not transit to another RRC state; when the first node is not in the SDT procedure, transit to an RRC Idle state.
16 . The method in the first node according to claim 13 , wherein when the first node is in an RRC Inactive state and an upper layer of the first node receives the first indication from a lower layer of the first node, the first node determines whether to transit to another RRC state depending on whether a second timer is running; wherein when the second timer is running, do not transit to another RRC state; when the second timer is not running, transit to an RRC Idle state.
17 . The method in the first node according to claim 11 , comprising:
receiving a first message, the first message indicating at least one multicast MRB;
wherein each multicast MRB of the at least one multicast MRB is associated with an interested MBS session of the first node.
18 . The method in the first node according to claim 17 , comprising:
receiving a second message, the second message indicating at least one logical channel;
wherein each logical channel of the at least one logical channel is associated with a multicast MRB of the at least one multicast MRB; the at least one logical channel belongs to the given logical channel set.
19 . The method in the first node according to claim 11 , wherein the non-unicast RNTI is a G-RNTI, or a G-CS-RNTI.
20 . The method in the first node according to claim 11 , wherein a logical channel that belongs to the target logical channel set but does not belong to the given logical channel set is not configured for the first node;
wherein at least one logical channel comprised in the target logical channel set does not belong to the given logical channel set.