METHOD AND DEVICE IN NODES USED FOR WIRELESS COMMUNICATION
The present application provides a method and a device in nodes used for wireless communications. A first node receives first configuration information, the first configuration information being non-unicast, and the first configuration information indicating K sub-bearers; herein, K is a positive integer greater than 1; for any higher-layer packet transmitted respectively through the K sub-bearers, sequence numbers of the higher-layer packet in the K sub-bearers are the same; a first sub-bearer is one of the K sub-bearers, and a higher-layer packet transmitted in any of the K sub-bearers is transmitted through the first sub-bearer. The present application enables the users to acquire by broadcast configuration information of sub-bearers transmitting the same MBMS on different nodes or CGs, so that the same MBMS can be acquired from multiple nodes simultaneously with decreased traffic interruptions caused by inter-node mobility.
1 . A first node for wireless communications, comprising:
a first receiver, receiving first configuration information, the first configuration information being non-unicast, and the first configuration information indicating K sub-bearers;
wherein K is a positive integer greater than 1; for any higher-layer packet transmitted respectively through the K sub-bearers, sequence numbers of the higher-layer packet in the K sub-bearers are the same; a first sub-bearer is one of the K sub-bearers, and a higher-layer packet transmitted in any of the K sub-bearers is transmitted through the first sub-bearer; the phrase of first configuration information being non-unicast comprises: the first configuration information being transmitted on a broadcast/multicast channel; the phrase of first configuration information being non-unicast comprises: the first configuration information being transmitted on a Multicast Broadcast Service Control Channel (MCCH); the first configuration information is transmitted by a Radio Resource Control (RRC) signaling; same broadcast service is transmitted on the K sub-bearers.
2 . The first node according to claim 1 , wherein the first node is in an idle state.
3 . The first node according to claim 2 , wherein a PDCP 6105 is a receiving Packet Data Convergence Protocol (PDCP) entity, the PDCP 6105 not using the function of encryption and integrity protection.
4 . The first node according to claim 3 , wherein a non-unicast index of any of the K sub-bearers is a Group-Radio Network Temporary Identity (G-RNTI), where the non-unicast index of any of the K sub-bearers comprises 16 bits.
5 . The first node according to claim 4 , wherein the phrase of the first configuration information indicating K sub-bearers comprises: the first configuration information comprising a Radio Link Control (RLC) entity configuration and a logical channel configuration for any of the K sub-bearers.
6 . The first node according to claim 5 , wherein the high-layer packet refers to an Internet Protocol (IP) packet.
7 . The first node according to claim 6 , wherein the PDCP 6105 also provides header compression used for an upper-layer packet to reduce radio transmission overhead.
8 . The first node according to claim 3 , wherein the phrase of the first configuration information indicating K sub-bearers comprises: the first configuration information indicating a radio bearer (RB) associated with the K sub-bearers.
9 . The first node according to claim 8 , wherein a same RB associated with the K sub-bearers is a Multicast Radio Bearer (MRB); the first configuration information indicates configuration information for a PDCP entity of the same RB associated with the K sub-bearers.
10 . The first node according to claim 9 , wherein a sequence number of the higher-layer packet is indicated by a Sequence Number (SN) field comprised in the higher-layer packet; the higher-layer packet refers to a L2 packet; the L2 packet is an RLC Protocol Data Unit (PDU).
11 . The first node according to claim 10 , wherein the PDCP 6105 is a PDCP entity of an RB associated with the first sub-bearer.
12 . The first node according to claim 11 , wherein the PDCP 6105 also provides header compression used for an upper-layer packet to reduce radio transmission overhead.
13 . The first node according to claim 3 , comprising:
the first receiver, receiving second configuration information; the second configuration information indicates logical channel configuration information for a first target sub-bearer and a G-RNTI corresponding to the first target sub-bearer; for any higher-layer packet transmitted respectively through the first sub-bearer and the first target sub-bearer, sequence numbers of the higher-layer packet in the two sub-bearers are the same.
14 . The first node according to claim 3 , comprising:
the first receiver, receiving third configuration information;
wherein the third configuration information indicates scheduling information of first sub-configuration-information; the first configuration information comprises first sub-configuration-information and second sub-configuration-information; the third configuration information comprises one or multiple fields in a System Information Block (SIB).
15 . The first node according to claim 7 , comprising:
The transmitting PDCP does not use the function of PDCP duplication.
16 . The first node according to claim 8 , comprising:
The transmitting PDCP does not use the function of PDCP duplication.
17 . The first node according to claim 12 , comprising:
The transmitting PDCP does not use the function of PDCP duplication.
18 . The first node according to claim 3 , comprising:
The transmitting PDCP does not use the function of PDCP duplication.
19 . A second node for wireless communications, comprising:
a second transmitter, transmitting first configuration information, the first configuration information being non-unicast, and the first configuration information indicating K sub-bearers;
wherein K is a positive integer greater than 1; for any higher-layer packet transmitted respectively through the K sub-bearers, sequence numbers of the higher-layer packet in the K sub-bearers are the same; a first sub-bearer is one of the K sub-bearers, and a higher-layer packet transmitted in any of the K sub-bearers is transmitted through the first sub-bearer; the phrase of first configuration information being non-unicast comprises: the first configuration information being transmitted on a broadcast/multicast channel; the phrase of first configuration information being non-unicast comprises: the first configuration information being transmitted on an MCCH; the first configuration information is transmitted by an RRC signaling; same broadcast service is transmitted on the K sub-bearers.
20 . A method in a first node for wireless communications, comprising:
receiving first configuration information, the first configuration information being non-unicast, and the first configuration information indicating K sub-bearers;
wherein K is a positive integer greater than 1; for any higher-layer packet transmitted respectively through the K sub-bearers, sequence numbers of the higher-layer packet in the K sub-bearers are the same; a first sub-bearer is one of the K sub-bearers, and a higher-layer packet transmitted in any of the K sub-bearers is transmitted through the first sub-bearer; the phrase of first configuration information being non-unicast comprises: the first configuration information being transmitted on a broadcast/multicast channel; the phrase of first configuration information being non-unicast comprises: the first configuration information being transmitted on an MCCH; the first configuration information is transmitted by an RRC signaling; same broadcast service is transmitted on the K sub-bearers.