Method and apparatus for transmitting buffer status report for bi-directional transmission in wireless communication system

• US 10,506,548 B2
• Filed: 12/28/2015
• Issued: 12/10/2019
• Est. Priority Date: 12/30/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Youngdae, Jung, Sunghoon
• Primary Examiner(s): Choudhry, Samina F
• Application Number:
  US15/536,637
• Publication Number:
  US 20170374677A1
• Time in Patent Office: 1,443 Days
• Field of Search: 370329
• CPC Class Codes: H04L 2209/80 Wireless
• CPC Class Codes: H04L 2209/84 Vehicles
• CPC Class Codes: H04L 9/3247 involving digital signatures
• CPC Class Codes: H04W 12/033 of the user plane, e.g. user's traffic
• CPC Class Codes: H04W 12/037 of the control plane, e.g. signalling traffic
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 36/0005 Control or signalling for completing the hand-off
• CPC Class Codes: H04W 36/36 by user or terminal equipment
• CPC Class Codes: H04W 4/021 Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 4/44 for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
• CPC Class Codes: H04W 4/46 for vehicle-to-vehicle communication [V2V]
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 68/005 Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 80/02 : Data link layer protocols
• CPC Class Codes: H04W 84/005 : Moving wireless networks

Abstract

A method and apparatus for transmitting a buffer status report for a bi-directional transmission in a wireless communication system is provided. A user equipment (UE) triggers a buffer status report for the bi-directional transmission, and transmits the buffer status report for the bi-directional transmission or a scheduling request for the bi-directional transmission to a network. The bi-direction transmission may correspond to vehicle-to-everything (V2X) communication.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:

detecting a buffer status report for a bi-directional transmission, which consists of an uplink (UL) transmission and a sidelink (SL) transmission, wherein the SL transmission is UE to UE direct communication;

transmitting a scheduling request (SR) for the bi-directional transmission to a network via a specific random access preamble identifier (ID) dedicated to the SR for the bi-directional transmission;

transmitting the buffer status report for the bi-directional transmission including an amount of data available for the bi-directional transmission to the network via a newly defined buffer status report (BSR) media access control (MAC) control element (CE) specific to the bi-directional transmission;

when the UE receives a UL grant from the network, performing the UL transmission for the data available for the bi-directional transmission; and

wherein the network determines to transmit one of the UL grant or the SL grant based on the amount of data available for the bi-directional transmission in response to the newly defined BSR MAC CE specific to the bi-directional transmission.

2. The method of claim 1, wherein the transmission of the scheduling request for the bi-directional transmission is via a specific code point on a physical uplink control channel (PUCCH).

3. The method of claim 1, wherein the transmission of the scheduling request for the bi-directional transmission is via a specific code point on a new uplink channel.

4. The method of claim 1, wherein the UE is located in a vehicle.

5. The method of claim 1, wherein the bi-directional transmission is specific to vehicular communication between vehicles or between a vehicle and other type of device.

6. The method of claim 5, wherein the network corresponds to one of an evolved NodeB (eNB), a new entity for the vehicular communication, a new gateway for the vehicular communication, or a road side unit (RSU).

7. A user equipment (UE) comprising:

a memory;

a transceiver; and

a processor coupled to the memory and the transceiver, and configured to;

detect a buffer status report for a bi-directional transmission, which consists of an uplink (UL) transmission and a sidelink (SL) transmission, wherein the SL transmission is UE to UE direct communication,

control the transceiver to transmit a scheduling request (SR) for the bi-directional transmission to a network via a specific random access preamble identifier (ID) dedicated to the SR for the bi-directional transmission,

control the transceiver to transmit the buffer status report for the bi-directional transmission including an amount of data available for the bi-directional transmission to the network via a newly defined buffer status report (BSR) media access control (MAC) control element (CE) specific to the bi-directional transmission;

when the UE receives a UL grant from the network, perform the UL transmission for the data available for the bi-directional transmission; and

when the UE receives a SL grant from the network, perform the SL transmission for the data available for the bi-directional transmission,

wherein the network determines to transmit one of the UL grant or the SL grant based on the amount of data available for the bi-directional transmission in response to the newly defined BSR MAC CE specific to the bi-directional transmission.