PACKET DUPLICATION FOR HIGH RELIABILITY COMMUNICATION

• US 20200136762A1
• Filed: 10/24/2019
• Published: 04/30/2020
• Est. Priority Date: 10/30/2018
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Yerramalli, Srinivas, Zhang, Xiaoxia, Fakoorian, Seyed Ali Akbar
• Granted Patent: US 11,297,644 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1816 with retransmission of the same, encoded, message
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access
• CPC Class Codes: H04W 8/245 from a network towards a terminal
• CPC Class Codes: H04W 80/02 Data link layer protocols
• CPC Class Codes: H04W 80/08 Upper layer protocols network arrangements or communication protocols for networked applications H04L67/00
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 92/02 Inter-networking arrangements
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for increasing the chances that a high reliability packet scheduled to be transmitted in a shared radio frequency spectrum is received by a receiving device. In one example, a wireless device (e.g., a base station or a user equipment (UE)) may duplicate a packet at a packet data convergence protocol (PDCP) layer for transmission on multiple listen before talk (LBT) subchannels of a carrier to improve reliability. In another example, a wireless device may duplicate a packet at a physical (PHY) layer for transmission on multiple LBT subchannels of a carrier to improve reliability, or the wireless device may encode and map the packet to multiple LBT subchannels of a carrier for transmission on the multiple LBT subchannels to improve reliability.

Claims

1. A method for wireless communication by a user equipment, comprising:

receiving configuration signaling indicating a mapping of a first logical channel to a first subchannel of a carrier and a second logical channel to a second subchannel of the carrier; and

transmitting or receiving a transmission of a first data packet via the first subchannel of the carrier and a duplicate of the transmission associated with the second logical channel via the second subchannel of the carrier based at least in part on the mapping.

2. The method of claim 1, further comprising:

generating the first data packet for the first logical channel and a duplicate first data packet for the second logical channel, wherein the transmitting or receiving further comprises;

transmitting the transmission comprising the first data packet via the first subchannel of the carrier and the duplicate of the transmission comprising the duplicate first data packet via the second subchannel of the carrier.

3. The method of claim 1, wherein the mapping indicates a second mapping of a third logical channel to a third subchannel of the carrier, and wherein the method further comprises:

transmitting or receiving a second duplicate of the transmission via the third subchannel of the carrier based at least in part on the second mapping.

4. The method of claim 1, wherein receiving the configuration signaling further comprises:

receiving the configuration signaling indicating a prohibited subchannel of the carrier.

5. The method of claim 1, wherein the transmitting or receiving further comprises:

performing a first listen before talk procedure on the first subchannel prior to transmitting the transmission; and

performing a second listen before talk procedure on the second subchannel prior to transmitting the duplicate of the transmission.

6. The method of claim 1, wherein each of the first subchannel and the second subchannel is a different listen before talk subchannel of the carrier.

7. The method of claim 1, wherein the first logical channel is associated with a first channel identifier that differs from a second channel identifier of the second logical channel.

8. The method of claim 1, wherein the first data packet is a packet data convergence protocol (PDCP) packet.

9. A method for wireless communication by a user equipment, comprising:

receiving one or more grants scheduling transmission of a first data packet in a first subchannel and a second subchannel of a carrier; and

transmitting or receiving the transmission via the first subchannel and the second subchannel of the carrier based at least in part on the one or more grants.

10. The method of claim 9, further comprising:

receiving configuration signaling indicating a rate matching scheme.

11. The method of claim 10, wherein the transmitting or receiving further comprises:

receiving a first transmission of the first data packet via the first subchannel of the carrier and a second transmission of the first data packet via the second subchannel of the carrier;

de-rate matching the first transmission to generate a de-rate matched first transmission based at least in part on the rate matching scheme;

de-rate matching the second transmission to generate a de-rate matched second transmission based at least in part on the rate matching scheme; and

applying a decoding algorithm to the de-rate matched first transmission, the de-rate matched second transmission, or both.

12. The method of claim 11, wherein the rate matching scheme indicates that the de-rate matched first transmission includes a first redundancy version generated from the first data packet and at least a portion of a second redundancy version generated from the first data packet.

13. The method of claim 10, wherein the transmitting or receiving further comprises:

rate matching a first transmission of the first data packet to generate a rate matched first transmission based at least in part on the rate matching scheme;

rate matching a second transmission of the first data packet to generate a rate matched second transmission based at least in part on the rate matching scheme; and

transmitting the rate matched first transmission via the first subchannel of the carrier and the rate matched second transmission via the second subchannel of the carrier.

14. The method of claim 13, wherein the rate matching scheme indicates that the rate matched first transmission includes a first redundancy version generated from the first data packet and at least a portion of a second redundancy version generated from the first data packet.

15. The method of claim 9, further comprising:

receiving configuration signaling indicating a code rate; and

decoding the transmission based at least in part on the code rate.

16. The method of claim 9, wherein receiving the one or more grants further comprises:

receiving a first grant scheduling a first transmission of the first data packet via the first subchannel of the carrier and a second grant scheduling a second transmission of the first data packet via the second subchannel of the carrier.

17. The method of claim 16, further comprising:

determining an association between the first transmission and the second transmission based at least in part on the first grant and the second grant; and

soft combining the first transmission and the second transmission to decode the first data packet based at least in part on the association.

18. The method of claim 17, wherein determining the association further comprises:

identifying a common feedback identifier for the first subchannel of the carrier and the second subchannel of the carrier within a same transmission time interval, wherein the first transmission and the second transmission each correspond to the common feedback identifier.

19. The method of claim 16, further comprising:

transmitting a joint feedback message via the first subchannel, the second subchannel, or both, to provide joint feedback on the first transmission and the second transmission.

20. The method of claim 16, further comprising:

transmitting a first feedback message via the first subchannel of the carrier to provide feedback on the first transmission and a second feedback message via the second subchannel of the carrier to provide feedback on the second transmission.

21. The method of claim 9, further comprising:

generating the first data packet to include a duplication tag;

generating a first transmission comprising the first data packet and a second transmission comprising the first data packet based at least in part on the duplication tag, wherein the transmitting or receiving further comprises; and

transmitting the first transmission via the first subchannel of the carrier and the second transmission via the second subchannel of the carrier.

22. The method of claim 21, wherein the first data packet is a medium access control service data unit (MAC-SDU).

23. The method of claim 9, further comprising:

receiving configuration signaling indicating at least one feedback resource for the first subchannel, the second subchannel, or both; and

transmitting, via the at least one feedback resource, a feedback message.

24. The method of claim 23, wherein the transmitting or receiving further comprises:

receiving a first transmission of the first data packet via the first subchannel of the carrier and a second transmission of the first data packet via the second subchannel of the carrier, wherein the feedback message is a joint feedback message that provides feedback for the first transmission and the second transmission.

25. The method of claim 9, wherein each of the first subchannel and the second subchannel is a different listen before talk subchannel of the carrier.

26. The method of claim 9, wherein each of the first subchannel and the second subchannel is a different bandwidth part of the carrier.

27. The method of claim 9, wherein the transmitting or receiving further comprises:

receiving a first transmission of the first data packet via the first subchannel of the carrier and a second transmission of the first data packet via the second subchannel of the carrier, wherein each of the first transmission and the second transmission is self-decodable.

28. The method of claim 9, wherein the first data packet is a packet data convergence protocol (PDCP) packet.

29. A method for wireless communication by a base station, comprising:

transmitting configuration signaling indicating a mapping of a first logical channel to a first subchannel of a carrier and a second logical channel to a second subchannel of the carrier; and

transmitting or receiving a transmission of a first data packet via the first subchannel of the carrier and a duplicate of the transmission associated with the second logical channel via the second subchannel of the carrier based at least in part on the mapping.

30. A method for wireless communication by a base station, comprising:

transmitting one or more grants scheduling transmission of a first data packet in a first subchannel and a second subchannel of a carrier; and

transmitting or receiving the transmission via the first subchannel and the second subchannel of the carrier based at least in part on the one or more grants.