Group bearer and bearer selection for multicast/broadcast data transmissions

Patent metadata

Field	Value
Publication number	US-2016119762-A1
Application number	US-201314890892-A
Country	US
Kind code	A1
Filing date	May 15, 2013
Priority date	May 15, 2013
Publication date	Apr 28, 2016
Grant date	—

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a UE that receives a multicast/broadcast data transmission via a group bearer. The UE receives a paging message including a type of the group bearer. In addition, the UE determines whether to remain in or change to an RRC idle mode or an RRC connected mode based on the type of the group bearer received in the paging message.

First claim

What is claimed is:

1 . A method of a user equipment (UE) of receiving a multicast/broadcast data transmission via a group bearer, comprising:
receiving a paging message comprising a type of the group bearer; and determining whether to remain in or change to a radio resource control (RRC) idle mode or an RRC connected mode based on the type of the group bearer received in the paging message.

2 . The method of claim 1 , wherein the type of the group bearer is one of idle, hybrid, or connected.

3 . The method of claim 2 , wherein the determining whether to remain in or change to an RRC idle mode or an RRC connected mode is further based on at least one of a received signal quality, a mobility of the UE, or delay requirements of the multicast/broadcast data transmission when the type of the group bearer is hybrid.

4 . The method of claim 1 , wherein the paging message further comprises a group identifier, and the method further comprises receiving group bearer parameters if the UE is associated with the group identifier.

5 . The method of claim 4 , wherein the paging message further comprises a group radio network temporary identifier (G-RNTI), and the method further comprises descrambling the received group bearer parameters based on the G-RNTI.

6 . The method of claim 4 , wherein the group bearer parameters comprise at least one of a bearer identifier, the group identifier, the G-RNTI, a list of target UEs, a radio link control (RLC)/packet data convergence protocol (PDCP) configuration, a quality of service (QoS) profile, an Internet Protocol (IP) address, and the type of the group bearer.

7 . The method of claim 4 , wherein the group bearer parameters comprise a group discontinuous reception (DRX) configuration, and the method further comprises receiving the multicast/broadcast data transmission based on the group DRX configuration when the group bearer is activated.

8 . The method of claim 1 , further comprising:
receiving a multicast/broadcast data transmission packet through the group bearer; attempting to decode the multicast/broadcast data transmission packet; sending a negative acknowledgement (ACK) (NACK) when unable to decode the multicast/broadcast data transmission packet; and refraining from sending an ACK when able to decode the multicast/broadcast data transmission packet.

9 . The method of claim 8 , wherein the NACK is sent in a PUCCH format 1 message.

10 . The method of claim 9 , wherein the UE is not scheduled to transmit channel quality indicator (CQI) feedback simultaneously with the NACK.

11 . The method of claim 8 , wherein the NACK is sent in a same resource shared by other UEs, wherein the resource is associated with a physical downlink control channel (PDCCH) used for scheduling the multicast/broadcast data transmission.

12 . The method of claim 1 , wherein the type of the group bearer is hybrid or connected, and the method further comprises determining to remain in or to change to the RRC connected mode.

13 . The method of claim 12 , further comprising:
receiving a channel quality indicator (CQI) feedback configuration, the CQI feedback configuration being based on previously provided CQI feedback or a measurement report; and sending CQI feedback based on the CQI feedback configuration.

14 . The method of claim 12 , further comprising:
receiving a multicast/broadcast data transmission packet; attempting to decode the multicast/broadcast data transmission packet; sending channel quality indicator (CQI) feedback when unable to decode the multicast/broadcast data transmission packet; and refraining from sending the CQI feedback when able to decode the multicast/broadcast data transmission packet.

15 . The method of claim 12 , further comprising:
determining channel quality indicator (CQI) feedback; sending the CQI feedback when the CQI feedback is less than a CQI threshold; and refraining from sending the CQI feedback when the CQI feedback is greater than the CQI threshold.

16 . The method of claim 15 , further comprising receiving the CQI threshold through one of a physical downlink control channel (PDCCH) or a layer 3 message.

17 . The method of claim 1 , further comprising:
receiving the multicast/broadcast data transmission from an evolved Node B (eNB); sending a negative acknowledgement (NACK) upon unsuccessfully decoding the received multicast/broadcast data transmission; and receiving a retransmission of the multicast/broadcast data transmission based on network coding automatic repeat request (NC-ARQ).

18 . The method of claim 1 , further comprising receiving a configuration to receive the multicast/broadcast data transmission through rank 1 transmissions from an evolved Node B (eNB).

19 . The method of claim 18 , further comprising:
determining channel quality indictor (CQI) feedback based on one of a space-frequency block code (SFBC) diversity scheme, or an SFBC and a frequency switched transmit diversity (FSTD) diversity scheme; and sending the CQI to the eNB.

20 . The method of claim 1 , further comprising:
receiving a configuration to receive the multicast/broadcast data transmission through multi-user multiple input multiple output (MU-MIMO) from an evolved Node B (eNB); determining channel quality indicator (CQI) feedback and a precoding matrix indicator (PMI); and sending the determined CQI and PMI to the eNB.

21 . A method of an evolved Node B (eNB) of providing a multicast/broadcast data transmission via a group bearer, comprising:
determining a type of the group bearer; and sending a paging message comprising the type of the group bearer to a set of user equipments (UEs).

22 . The method of claim 21 , wherein the type of the group bearer is determined to be one of idle, hybrid, or connected.

23 . The method of claim 21 , further comprising determining at least one of a type of the multicast/broadcast data transmission, an importance of the multicast/broadcast data transmission, or a number of UEs in the set of UEs, wherein the type of the group bearer is determined based on the determined at least one of the type of the multicast/broadcast data transmission, the importance of the multicast/broadcast data transmission, or the number of UEs in the set of UEs.

24 . The method of claim 21 , wherein the paging message further comprises a group identifier associated with the set of UEs, and the method further comprises sending group bearer parameters to the set of UEs.

25 . The method of claim 24 , wherein the paging message further comprises a group radio network temporary identifier (G-RNTI), and the method further comprises scrambling the group bearer parameters based on the G-RNTI.

26 . The method of claim 24 , wherein the group bearer parameters comprise at least one of a bearer identifier, the group identifier, the G-RNTI, a list of UEs in the set of UEs, a radio link control (RLC)/packet data convergence protocol (PDCP) configuration, a quality of service (QoS) profile, an Internet Protocol (IP) address, and the type of the group bearer.

27 . The method of claim 24 , wherein the group bearer parameters comprise a group discontinuous reception (DRX) configuration, and the method further comprises transmitting the multicast/broadcast data transmission to the set of UEs based on the group DRX configuration when the group bearer is activated.

Assignees

• Zhu Xipeng
• Wang Jun
• Zhang Xiaoxia
• Qualcomm Inc

Inventors

• Zhu Xipeng
• Wang Jun
• Zhang Xiaoxia

Classifications

• H04W72/30

  Resource management for broadcast services · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W4/10

  Push-to-Talk [PTT] or Push-On-Call services · CPC title

• H04W76/046

  Electricity · mapped topic