Method for reporting buffer status of terminal and apparatus therefor in system in which heterogeneous wireless communication technologies are utilized

• US 10,237,778 B2
• Filed: 11/03/2014
• Issued: 03/19/2019
• Est. Priority Date: 09/19/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, Hyeyoung, Cho, Heejeong, Ko, Hyunsoo, Byun, Ilmu, Park, Kungmin
• Primary Examiner(s): Pham, Brenda H
• Application Number:
  US15/507,144
• Publication Number:
  US 20170289839A1
• Time in Patent Office: 1,597 Days
• Field of Search: 3703102, 370328, 370349, 370338, 370329, 370341
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/563 of the wireless resources
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

The present invention relates to a method for reporting a buffer status and an apparatus therefor in a heterogeneous wireless communication system. A terminal receives a configuration message for a multi-RAT integration scheduling from a cellular controller, and, on the basis of the configuration message, can report the buffer status in a format comprising identification information for a logic channel and a multi-RAT scheduling indication field.

Claims

1. A method of transmitting a buffer status report (BSR) in a multi-radio access technology (RAT) system including a cellular network and a wireless local area network (WLAN) by a multi-RAT user equipment (UE), the method comprising:

receiving a setup message of multi RAT integration scheduling from a cellular controller,

wherein the setup message of the multi-RAT integration scheduling includes condition information including a time threshold value which is a reference value to be compared with an access time, and

wherein the access time is a time interval during which a BSR is transmitted through the WLAN;

transmitting a multi-RAT integration BSR to the cellular controller based on the setup message when the access time exceeds the time threshold value; and

transmitting a data through resources that are dynamically allocated resources of the cellular network and the WLAN based on the multi-RAT integration BSR.

2. The method of claim 1, wherein the setup message of the multi-RAT integration scheduling is included and received in a system information block or an RRC connection (re)setup message.

3. The method of claim 1, further comprising receiving a UE capability enquiry message that determines whether the multi-RAT UE supports a multi-RAT integration buffer from the cellular controller.

4. The method of claim 1,

wherein the multi-RAT integration BSR is transmitted based on a branched layer of a bearer to which the multi-RAT integration scheduling is set, and

wherein the bearer is split into the cellular network and the WLAN.

6. The method of claim 1,

wherein the multi-RAT integration BSR includes a multi-RAT scheduling indication field, an identifier of a logical channel group (LCG) and a buffer size for the LCG, and

wherein the multi-RAT scheduling indication field indicates whether the multi-RAT integration scheduling is applied to the LCG.

5. A multi-RAT user equipment (UE) of transmitting a buffer status report (BSR) in a multi-radio access technology (RAT) system including a cellular network and a wireless local area network (WLAN), the multi-RAT UE, comprising:

a signal transmitting and receiving unit; and

a processor connected to the signal transmitting and receiving unit,

wherein the processor is configured to;

receive a setup message of multi-RAT integration scheduling from the cellular controller,

wherein the setup message of the multi-RAT integration scheduling includes condition information including a time threshold value which is a reference value to be compared with an access time, and

wherein the access time is a time interval during which a BSR is transmitted through the WLAN,

transmit a multi-RAT integration BSR to the cellular controller based on the setup message when the access time exceeds the time threshold value, and

transmit a data through resources that are dynamically allocated resources of the cellular network and the WLAN based on the multi-RAT integration BSR.

7. The terminal of claim 5,

wherein the multi-RAT integration BSR includes a multi-RAT scheduling indication field, an identifier of a logical channel group (LCG) and a buffer size for the LCG, and

wherein the multi-RAT scheduling indication field indicates whether the multi-RAT integration scheduling is applied to the LCG.