Methods and apparatus for lte coordinated transmission on unlicensed spectrum

Patent metadata

Field	Value
Publication number	US-2016270100-A1
Application number	US-201615061740-A
Country	US
Kind code	A1
Filing date	Mar 4, 2016
Priority date	Mar 13, 2015
Publication date	Sep 15, 2016
Grant date	—

Abstract

A method for a coordinated transmission in a wireless communication system. The method includes processing feedback information from multiple transmit points (TPs) operating in license assisted access (LAA) cells, generating scheduling information for the coordinated transmission by the multiple TPs to a user equipment (UE) in accordance with the feedback information, transmitting the scheduling information to the multiple TPs, and receiving the feedback information from the multiple TPs.

First claim

What is claimed is:

1 . A network entity (NE) comprising:
a communication interface configured to receive feedback information from multiple transmit points (TPs) operating in license assisted access (LAA) cells; and at least one processor configured to:
process the feedback information received from the multiple TPs; and
generate scheduling information for a coordinated transmission by the multiple TPs to a user equipment (UE) in accordance with the feedback information,
wherein the communication interface is further configured to transmit the scheduling information to the multiple TPs.

2 . The NE of claim 1 , wherein the at least one processor is further configured to:
segment data packet into a plurality of transport blocks (TBs) in accordance with the feedback information received from the multiple TPs; and schedule a number of the TBs to be transmitted to the UE through the multiple TPs.

3 . The NE of claim 2 , wherein segmentation of the data packet further comprises segment the data packet with the same TB size.

4 . The NE of claim 2 , wherein segmentation of the data packet further comprises segment the data packet with different TB sizes.

5 . The NE of claim 1 , wherein the feedback information comprises at least one of channel access rate information that is determined based on a listen before talk (LBT) protocol and channel state information received from the UE through the multiple TPs.

6 . The NE of claim 5 , wherein the feedback information further comprises inter-TP coordinated information determined by an inter-TP coordinated scheme between the multiple TPs.

7 . The NE of claim 1 , wherein the at least one processor is further configured to select the multiple TPs that perform the coordinated transmission to the UE based on channel access information of the respective TPs, the channel access information included in the feedback information.

8 . The NE of claim 1 , wherein the scheduling information includes TP selection information.

9 . A first transmit point (TP) operating in a first licensed assisted access (LAA) cell comprising:
at least one processor configured to:
establish a connection with a second TP operating in a second license assisted access (LAA) cell to perform a coordinated transmission to a user equipment (UE); and
generate inter-TP coordinated information in accordance with an inter-TP coordinated scheme between the first and second TPs;
process feedback information received from the UE; and
a communication interface configured to:
transmit the feedback information to a network entity (NE); and
receive scheduling information from the NE based on the feedback information.

10 . The first TP of claim 9 , wherein the scheduling information includes TP-selection information.

11 . The first TP of claim 9 , wherein the communication interface is further configured to:
receive data packet that is segmented into a plurality of transport blocks (TBs) from the NE, the plurality of TBs being segmented in accordance with the feedback information; and transmit the plurality of TBs to the UE in accordance with the scheduling information received from the NE.

12 . The first TP of claim 11 , wherein the communication interface is further configured to retransmit the plurality of TBs to the UE in accordance with a radio link control protocol when the first TP is unable to re-transmit a hybrid automatic repeat and request (H-ARQ) data packet to the UE.

13 . The first TP of claim 11 , wherein transmission of the plurality of TBs is coordinated to transmit different TBs to the UE than the second TP.

14 . The first TP of claim 9 , wherein the feedback information comprises at least one of channel access rate information that is determined based on a listen before talk (LBT) protocol and channel state information received from the UE through the multiple TPs.

15 . The first TP of claim 14 , wherein the feedback information further comprises the inter-TP coordinated information.

16 . The first TP of claim 9 , wherein a retransmission based on a radio link protocol is performed either by the first TP or the second TP, when the first TP is unable to re-transmit a hybrid automatic repeat and request (H-ARQ) data packet to the UE.

17 . A method for a coordinated transmission in a wireless communication system, the method comprising:
receiving, by a network entity (NE), feedback information from multiple transmit points (TPs) operating in license assisted access (LAA) cells; processing, by the NE, the feedback information from the TPs; generating, by the NE, scheduling information for the coordinated transmission by the multiple TPs to a user equipment (UE) in accordance with the feedback information; and transmitting, by the NE, the scheduling information to the multiple TPs.

18 . The method of claim 17 , further comprising:
segmenting data packet into a plurality of transport blocks (TBs) in accordance with the feedback information received from the multiple TPs; and scheduling a number of the TBs to be transmitted to the UE through the multiple TPs.

19 . The method of claim 17 , wherein the feedback information comprises at least one of channel access rate information that is determined based on a listen before talk (LBT) protocol and channel state information received from the UE through the multiple TPs.

20 . The method of claim 17 , further comprising:
selecting the multiple TPs that perform the coordinated transmission to the UE based on channel access information of the respective TPs, the channel access information included in the feedback information.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Ng Boon Loong
• Novlan Thomas David

Classifications

• H04L1/1819

  with retransmission of additional or different redundancy · CPC title

• H04W72/542

  using measured or perceived quality · CPC title

• H04L5/001 Primary

  the frequencies being arranged in component carriers · CPC title

• H04W74/0808

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title

• H04L5/0023

  Time-frequency-space · CPC title