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Method and apparatus for changing discontinuous reception cycle in wireless communication system

a wireless communication system and discontinuous reception technology, applied in the field of wireless communication, can solve the problems of not being able to properly configure the drx, not easy to configure the drx suitable for all applications,

Inactive Publication Date: 2015-06-11
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent allows for flexible setting of a discontinuous reception cycle, which is useful for adjusting data transmission between the user equipment (UE) and the base station. By changing the DRX cycle, the UE can accurately respond to new data transmission without needing a long drunk period. Additionally, the patent describes how to consider data traffic when configuring a DRX operation, which can improve the efficiency of signaling and reduce interruptions.

Problems solved by technology

However, since battery consumption is great when the UE continuously maintains the network connection, a proper DRX is configured in a corresponding application to guarantee the always-on characteristic while reducing battery consumption.
Recently, several various applications are running in parallel in one UE, and thus it is not easy to configure one DRX suitable for all of the applications.
This is because, even if an optimal DRX is configured for a specific application, it may be a not proper DRX configuration with respect to other applications which are running in parallel.

Method used

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  • Method and apparatus for changing discontinuous reception cycle in wireless communication system
  • Method and apparatus for changing discontinuous reception cycle in wireless communication system
  • Method and apparatus for changing discontinuous reception cycle in wireless communication system

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Embodiment Construction

[0026]FIG. 1 shows a wireless communication system to which the present invention is applied. The wireless communication system may also be referred to as an evolved-UMTS terrestrial radio access network (E-UTRAN) or a long term evolution (LTE) / LTE-A system.

[0027]The E-UTRAN includes at least one base station (BS) 20 which provides a control plane and a user plane to a user equipment (UE) 10. The UE 10 may be fixed or mobile, and may be referred to as another terminology, such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, etc. The BS 20 is generally a fixed station that communicates with the UE 10 and may be referred to as another terminology, such as an evolved node-B (eNB), a base transceiver system (BTS), an access point, etc.

[0028]The BSs 20 are interconnected by means of an X2 interface. The BSs 20 are also connected by means of an Si interface to an evolved packet core (EPC) 30, more specifically, to a mob...

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Abstract

A method and apparatus for changing a Discontinuous Reception (DRX) cycle in a wireless communication system is provided. A wireless device configures a short DRX cycle and a long DRX cycle. When the wireless device receives a PDCCH indicating a new data transmission, it determines that the short DRX cycle is used and a running drxShortCycleTimer is stopped for the DRX operation. Discontinuous reception (DRX) cycle can be configured flexibly according to the new data transmission and a CSI report between the UE and the eNB can be complied with accurately and frequently.

Description

TECHNICAL FIELD[0001]The present invention relates to wireless communications, and more particularly, to a method and apparatus for changing a DRX cycle in a wireless communication system.BACKGROUND ART[0002]3rd generation partnership project (3GPP) long term evolution (LTE) is an improved version of a universal mobile telecommunication system (UMTS) and a 3GPP release 8. The 3GPP LTE uses orthogonal frequency division multiple access (OFDMA) in a downlink, and uses single carrier-frequency division multiple access (SC-FDMA) in an uplink. The 3GPP LTE employs multiple input multiple output (MIMO) having up to four antennas. In recent years, there is an ongoing discussion on 3GPP LTE-advanced (LTE-A) that is an evolution of the 3GPP LTE.[0003]Discontinuous reception (DRX) is a method for reducing battery consumption by allowing a user equipment (UE) to discontinuously monitor a downlink channel. When the DRX is configured, the UE discontinuously monitors the downlink channel. Otherwi...

Claims

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Application Information

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IPC IPC(8): H04W52/02H04W72/04
CPCH04W52/0216H04W72/048H04W52/0229H04W76/28Y02D30/70H04W72/21H04W72/23H04W72/51
Inventor LEE, SUNYOUNGLEE, YOUNGDAEPARK, SUNGJUNYI, SEUNGJUNEJUNG, SUNGHOON
Owner LG ELECTRONICS INC