METHOD AND DEVICE USED IN COMMUNICATION NODE FOR WIRELESS COMMUNICATION
The present disclosure provides a method and a device in a communication node for wireless communications. A communication node receives a first signaling; the first signaling is used to determine release of only one of a first logical channel group or a second logical channel group; herein, the first logical channel group comprises at least one logical channel, and the second logical channel group comprises at least one logical channel; data transmitted through the first logical channel group and data transmitted through the second logical channel group are associated with a PDCP entity. The present disclosure can support lossless transmission of broadcast/multicast data in an air interface during the process of switching PTP to PTM transmission mode.
1 . A first node for wireless communications, comprising:
a first receiver, receiving a first signaling, the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group;
wherein the first logical channel group comprises at least one logical channel, and the second logical channel group comprises at least one logical channel; data transmitted through the first logical channel group and data transmitted through the second logical channel group are associated with a PDCP entity; the first signaling comprises all or part of a RRCReconfiguration message; the phrase that the data transmitted through the first logical channel group and data transmitted through the second logical channel group are associated with a PDCP entity comprises: the first logical channel group and the second logical channel group are respectively associated with two RLC entities, and the two RLC entities are associated with the PDCP entity.
2 . The first node according to claim 1 , wherein the phrase of the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group means:
when the first signaling is identified by a non-unicast RNTI, the first logical channel group is released; when the first signaling is identified by a unicast RNTI, the first logical channel group is retained.
3 . The first node according to claim 1 , wherein the phrase of the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group means:
the first signaling indicates a first threshold, the first threshold being used to determine release of the second logical channel group.
4 . The first node according to claim 3 , wherein
when a second sequence number is greater than or equal to a first threshold, the second logical channel group is released; when a difference between a second sequence number and a first sequence number is less than a first threshold, the second logical channel group is released; the first sequence number comprises: a sequence number of a first-type packet occupied by data transmitted through the first logical channel group; the sequence number of the first-type packet comprises at least one of an SN or a COUNT value.
5 . The first node according to claim 3 , wherein
the first receiver, upon whose reception of the first signaling, a first timer is started; when the first timer expires, the second logical channel group is released.
6 . The first node according to claim 3 , comprising:
a first transmitter, transmitting first control information, the first control information indicating that the second logical channel group is released; the first control information is transmitted via a second signaling; the first control information is transmitted through a logical channel group other than a first logical channel group and a second logical channel group.
7 . The first node according to claim 6 , wherein
the second signaling comprises a MAC Control Element (CE).
8 . The first node according to claim 6 , wherein
the second signaling is transmitted on a PSSCH.
9 . The first node according to claim 1 , characterized in that:
a scheduling signaling in an air interface for the data transmitted through the first logical channel group is identified by a non-unicast RNTI, and a scheduling signaling in an air interface for the data transmitted through the second logical channel group is identified by a unicast RNTI.
10 . The first node according to claim 9 , wherein the phrase of the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group means:
when the first signaling is identified by a non-unicast RNTI, the first logical channel group is released; when the first signaling is identified by a unicast RNTI, the first logical channel group is retained.
11 . The first node according to claim 1 , characterized in that:
the phrase of the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group comprises: stopping monitoring on a scheduling signaling in an air interface for the data transmitted through the first logical channel group, or, stopping monitoring on a scheduling signaling in an air interface for the data transmitted through the second logical channel group.
12 . The first node according to claim 1 , characterized in that:
a Radio Bearer (RB) to which the first logical channel group belongs comprises a Multicast Radio Bearer (MRB); in the present disclosure, an RB to which the first logical channel group belongs comprises a Bearer transmitted in a Point-to-MultiPoint (PTM) mode; an RB to which the second logical channel group belongs comprises a PTP branch; an RB to which the first logical channel group belongs comprises a PTM branch.
13 . The first node according to claim 12 , characterized in that:
a scheduling signaling in an air interface for the data transmitted through the first logical channel group is identified by a non-unicast RNTI, and a scheduling signaling in an air interface for the data transmitted through the second logical channel group is identified by a unicast RNTI.
14 . The first node according to claim 13 , characterized in that:
the phrase of the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group comprises: stopping monitoring on a scheduling signaling in an air interface for the data transmitted through the first logical channel group, or, stopping monitoring on a scheduling signaling in an air interface for the data transmitted through the second logical channel group.
15 . The first node according to claim 1 , comprising:
the first signaling comprises configurations of the second logical channel group; the configurations of the second logical channel group comprise configuration of a Buffer Status Report (BSR).
16 . The first node according to claim 15 , characterized in that:
the first signaling comprises a first field; the first field indicates an identity of any logical channel in the first logical channel group; the action that the first logical channel group is released comprises: configurations of all logical channels in the first logical channel group are released.
17 . The first node according to claim 15 , characterized in that:
the phrase of the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group comprises: upon reception of the first signaling, stopping receiving data through the first logical channel group, the second logical channel group being activated.
18 . A second node for wireless communications, comprising:
a second transmitter, transmitting a first signaling, the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group;
wherein the first logical channel group comprises at least one logical channel, and the second logical channel group comprises at least one logical channel; data transmitted through the first logical channel group and data transmitted through the second logical channel group are associated with a PDCP entity; the first signaling comprises all or part of a RRCReconfiguration message; the phrase that the data transmitted through the first logical channel group and data transmitted through the second logical channel group are associated with a PDCP entity comprises: the first logical channel group and the second logical channel group are respectively associated with two RLC entities, and the two RLC entities are associated with the PDCP entity.
19 . A method in a first node for wireless communications, comprising:
receiving a first signaling, the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group;
wherein the first logical channel group comprises at least one logical channel, and the second logical channel group comprises at least one logical channel; data transmitted through the first logical channel group and data transmitted through the second logical channel group are associated with a PDCP entity; the first signaling comprises all or part of a RRCReconfiguration message; the phrase that the data transmitted through the first logical channel group and data transmitted through the second logical channel group are associated with a PDCP entity comprises: the first logical channel group and the second logical channel group are respectively associated with two RLC entities, and the two RLC entities are associated with the PDCP entity.
20 . A method in a second node for wireless communications, comprising:
transmitting a first signaling, the first signaling being used to determine release of only one of a first logical channel group or a second logical channel group;
wherein the first logical channel group comprises at least one logical channel, and the second logical channel group comprises at least one logical channel; data transmitted through the first logical channel group and data transmitted through the second logical channel group are associated with a PDCP entity; the first signaling comprises all or part of a RRCReconfiguration message; the phrase that the data transmitted through the first logical channel group and data transmitted through the second logical channel group are associated with a PDCP entity comprises: the first logical channel group and the second logical channel group are respectively associated with two RLC entities, and the two RLC entities are associated with the PDCP entity.