Method And Apparatus For Handling Data Duplication In Mobile Communications

Patent metadata

Field	Value
Publication number	US-2018367463-A1
Application number	US-201816009425-A
Country	US
Kind code	A1
Filing date	Jun 15, 2018
Priority date	Jun 16, 2017
Publication date	Dec 20, 2018
Grant date	—

Abstract

Various solutions for handling data duplication with respect to user equipment and network apparatus in mobile communications are described. An apparatus may establish a first link and a second link with a network. The apparatus may generate a first protocol data unit (PDU) to transmit on the first link. The apparatus may generate a second PDU to transmit on the second link. The apparatus may transmit the first PDU on the first link. The apparatus may determine whether to discard the second PDU according to a condition. The second PDU may be duplicated from the first PDU.

First claim

What is claimed is:

1 . A method, comprising:
establishing, by a processor of an apparatus, a first link and a second link with a network; generating, by the processor, a first protocol data unit (PDU) to transmit on the first link; generating, by the processor, a second PDU to transmit on the second link; transmitting, by the processor, the first PDU on the first link; and determining, by the processor, whether to discard the second PDU according to a condition, wherein the second PDU is duplicated from the first PDU.

2 . The method of claim 1 , further comprising:
initiating, by the processor, a timer; and discarding, by the processor, the PDU when the timer is expired, wherein the PDU is not transmitted before expiration of the timer.

3 . The method of claim 1 , further comprising:
maintaining, by the processor, a sliding window; and discarding, by the processor, a PDU when the PDU falls out of the sliding window, wherein the sliding window advances when a new PDU is generated.

4 . The method of claim 1 , further comprising:
maintaining, by the processor, a sliding window; and discarding, by the processor, a PDU when the PDU falls out of the sliding window, wherein the sliding window advances when a PDU is transmitted.

5 . The method of claim 1 , further comprising:
discarding, by the processor, the second PDU after the first PDU is transmitted.

6 . The method of claim 1 , further comprising:
initiating, by the processor, a timer after the first PDU is transmitted; and discarding, by the processor, the second PDU when the timer is expired.

7 . The method of claim 1 , further comprising:
receiving, by the processor, an acknowledgement of the first PDU; and discarding, by the processor, the second PDU after receiving the acknowledgement.

8 . The method of claim 7 , wherein the acknowledgement is received at a radio link control (RLC) layer.

9 . The method of claim 7 , wherein the acknowledgement is received via a hybrid automatic repeat request (HARQ) feedback.

10 . A method, comprising:
establishing, by a processor of an apparatus, a first link and a second link with a network; generating, by the processor, a first protocol data unit (PDU) to transmit on the first link; transmitting, by the processor, the first PDU on the first link; determining, by the processor, that the first PDU is unacknowledged; re-transmitting, by the processor, the first PDU on the first link; generating, by the processor, a second PDU by duplicating the first PDU; and transmitting, by the processor, the second PDU on the second link.

11 . An apparatus, comprising:
a transceiver capable of wirelessly communicating with a plurality of nodes of a wireless network; and a processor communicatively coupled to the transceiver, the processor capable of:
establishing, via the transceiver, a first link and a second link with a network;
generating a first protocol data unit (PDU) to transmit on the first link;
generating a second PDU to transmit on the second link;
transmitting, via the transceiver, the first PDU on the first link; and
determining whether to discard the second PDU according to a condition,
wherein the second PDU is duplicated from the first PDU.

12 . The apparatus of claim 11 , wherein the processor is further capable of:
initiating a timer; and discarding the PDU when the timer is expired, wherein the PDU is not transmitted before expiration of the timer.

13 . The apparatus of claim 11 , wherein the processor is further capable of:
maintaining a sliding window; and discarding a PDU when the PDU falls out of the sliding window, wherein the sliding window advances when a new PDU is generated.

14 . The apparatus of claim 11 , wherein the processor is further capable of:
maintaining a sliding window; and discarding a PDU when the PDU falls out of the sliding window, wherein the sliding window advances when a PDU is transmitted.

15 . The apparatus of claim 11 , wherein the processor is further capable of:
discarding the second PDU after the first PDU is transmitted.

16 . The apparatus of claim 11 , wherein the processor is further capable of:
initiating a timer after the first PDU is transmitted; and discarding the second PDU when the timer is expired.

17 . The apparatus of claim 11 , wherein the processor is further capable of:
receiving, via the transceiver, an acknowledgement of the first PDU; and discarding the second PDU after receiving the acknowledgement.

18 . The apparatus of claim 17 , wherein the acknowledgement is received at a radio link control (RLC) layer.

19 . The apparatus of claim 17 , wherein the acknowledgement is received via a hybrid automatic repeat request (HARQ) feedback.

20 . An apparatus, comprising:
a transceiver capable of wirelessly communicating with a plurality of nodes of a wireless network; and a processor communicatively coupled to the transceiver, the processor capable of:
establishing, via the transceiver, a first link and a second link with a network;
generating a first protocol data unit (PDU) to transmit on the first link;
transmitting, via the transceiver, the first PDU on the first link;
determining that the first PDU is unacknowledged;
re-transmitting, via the transceiver, the first PDU on the first link;
generating a second PDU by duplicating the first PDU; and
transmitting, via the transceiver, the second PDU on the second link.

Assignees

• Mediatek Singapore Pte Ltd

Inventors

• Jose Pradeep
• Kunt Mehmet
• Nuggehalli Pavan Santhana Krishna

Classifications

• H04W76/15

  Setup of multiple wireless link connections · CPC title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04L45/245

  Link aggregation, e.g. trunking · CPC title

• H04L1/189

  Transmission or retransmission of more than one copy of a message · CPC title

• H04L47/32 Primary

  by discarding or delaying data units, e.g. packets or frames · CPC title