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Method and apparatus for determining priorities of buffer status reports in wireless communication system

專利號(hào)
US10165573B2
公開(kāi)日期
2018-12-25
申請(qǐng)人
LG ELECTRONICS INC.(KR Seoul)
發(fā)明人
Youngdae Lee; Seungjune Yi; Sunyoung Lee; Sunghoon Jung
IPC分類
H04W72/04; H04W76/14; H04W4/02; H04W72/12; H04W28/02; H04W4/90; H04W12/06
技術(shù)領(lǐng)域
bsr,prose,bs,ue,d2d,mac,lcg,sr,pdu,bsrs
地域: Seoul

摘要

A method and apparatus for determining priorities of buffer status reports (BSRs) in a wireless communication system is provided. A user equipment (UE) generates a BSR for uplink transmission to a network and a proximity-based services (ProSe) BSR for device-to-device (D2D) transmission between UEs, and prioritizes the BSR for uplink transmission over the ProSe BSR.

說(shuō)明書

CROSS REFERENCE TO RELATED APPLICATIONS

This application is the National Phase of PCT International Application No. PCT/KR2015/002681, filed on Mar. 19, 2015, which claims priority under 35 U.S.C. 119(e) to U.S. Provisional Application No. 61/955,609, filed on Mar. 19, 2014, 61/955,778, filed on Mar. 19, 2014, 61/955,604, filed on Mar. 19, 2014, all of which are hereby expressly incorporated by reference into the present application.

TECHNICAL FIELD

The present invention relates to wireless communications, and more particularly, to a method and apparatus for determining priorities of buffer status reports (BSRs) in a wireless communication system.

BACKGROUND ART

3rd generation partnership project (3GPP) long-term evolution (LTE) is a technology for enabling high-speed packet communications. Many schemes have been proposed for the LTE objective including those that aim to reduce user and provider costs, improve service quality, and expand and improve coverage and system capacity. The 3GPP LTE requires reduced cost per bit, increased service availability, flexible use of a frequency band, a simple structure, an open interface, and adequate power consumption of a terminal as an upper-level requirement.

權(quán)利要求

1
The invention claimed is:1. A method for determining, by a user equipment (UE), priorities of buffer status reports (BSRs) in a wireless communication system, the method comprising:generating, by the UE, a BSR for uplink transmission to a network and a proximity-based services (ProSe) BSR for device-to-device (D2D) transmission between UEs;triggering, by the UE, at least one first scheduling request (SR) for the BSR and at least one second SR for the ProSe BSR;prioritizing, by the UE, the BSR for uplink transmission over the ProSe BSR by accommodating the BSR for uplink transmission in a media access control (MAC) protocol data unit (PDU); andcanceling all pending first SRs among the at least one first SR, while not canceling all pending second SRs among the at least one second SR.2. The method of claim 1, wherein the MAC PDU is configured to accommodate only one MAC BSR control element (CE).3. The method of claim 1, wherein the ProSe BSR is used to provide the network with information about an amount of data available for the D2D transmission.4. The method of claim 1, wherein the BSR for uplink transmission includes at least one of a short BSR or a long BSR.5. A user equipment (UE) configured to determine priorities of buffer status reports (BSRs) in a wireless communication system, the UE comprising:a radio frequency (RF) unit configured to transmit or receive a radio signal; anda processor coupled to the RF unit, and configured to:generate a BSR for uplink transmission and a proximity-based services (ProSe) BSR for device-to-device (D2D) transmission,trigger at least one first scheduling request (SR) for the BSR and at least one second SR for the ProSe BSR,prioritize the BSR for uplink transmission over the ProSe BSR by accommodating the BSR for uplink transmission in a media access control (MAC) protocol data unit (PDU), andcancel all pending first SRs among the at least one first SR, while not canceling all pending second SRs among the at least one second SR.6. The UE of claim 5, wherein the MAC PDU is configured to accommodate only one MAC BSR control element (CE).7. The UE of claim 5, wherein the ProSe BSR is used to provide the network with information about an amount of data available for the D2D transmission.8. The UE of claim 5, wherein the BSR for uplink transmission includes at least one of a short BSR or a long BSR.
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