Method and Apparatus for Scheduling Request

Inactive Publication Date: 2011-01-27
INNOVATIVE SONIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]According to the present invention, a method for performing Scheduling Request (SR) in a user equipment (UE) of a wireless communication system is disclosed. The method includes steps of triggering an SR; sending an SR message on a Physical Uplink Control Channel (PUCCH) when the UE has a configured PUCCH resource; and skipping a plurality of transmission opportunities for sending the SR message after the SR message is sent.

Problems solved by technology

When the number of D-SR transmissions reaches to the pre-defined parameter DSR_TRANS_MAX, it indicates uplink transmission of the UE may have some problem, such as the PUCCH resources for SR become invalid (probably due to poor signal quality or improper power settings) or the UE loses synchronization on uplink timing, and thus the D-SR messages sent by the UE cannot be successfully received by the network.
For the growing demands on real-time communication services, the waiting time may be too long.
However, when the periodicity is shorter than the time expenditure the eNB requires to handle the SR message or shorter than packet Round Trip Time (RTT), some of the SR transmission is redundant, and causes unnecessary power waste of the UE.

Method used

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  • Method and Apparatus for Scheduling Request

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Embodiment Construction

[0019]Please refer to FIG. 1, which illustrates a schematic diagram of a wireless communications system 10. The wireless communications system 10 is preferred to be a Long Term Evolution (LTE) system, and is briefly composed of a network and a plurality of user equipments (UEs). In FIG. 1, the network and the UEs are simply utilized for illustrating the structure of the wireless communications system 10. Practically, the network may comprise a plurality of base stations (Node Bs), radio network controllers and so on according to actual demands, and the UEs can be devices such as mobile phones, computer systems, etc.

[0020]Please refer to FIG. 2, which is a functional block diagram of a communications device 100 in a wireless communications system. The communications device 100 can be utilized for realizing the UEs in FIG. 1, and the wireless communications system is preferably the LTE system. For the sake of brevity, FIG. 2 only shows an input device 102, an output device 104, a cont...

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Abstract

The present invention provides a method of performing Scheduling Request (SR) in a user equipment (UE) of a wireless communication system. The method includes steps of triggering an SR, sending an SR message on a Physical Uplink Control Channel (PUCCH) when the UE has a configured PUCCH resource, and skipping a plurality of subsequent SR transmission opportunities after the SR message is sent.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 61 / 228148, filed on Jul. 23, 2009 and entitled “Advanced Transmission and Reception for DRX and SR”, the contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a method and apparatus for performing Scheduling Request, and more particularly, to a method and apparatus for performing Scheduling Request in a user equipment (UE) of a wireless communication system to reduce unnecessary Scheduling Request transmission when the Scheduling Request is sent in a short periodicity, such that power consumption can be saved.[0004]2. Description of the Prior Art[0005]Long Term Evolution wireless communication system (LTE system), an advanced high-speed wireless communication system established upon the 3G mobile telecommunication system, supports only packet-switched transmission, and te...

Claims

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Application Information

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IPC IPC(8): H04W4/00
CPCH04W72/1284H04W28/06Y02B60/50Y02D30/70H04W72/21H04J11/00H04W52/02
InventorTSENG, LI-CHIH
OwnerINNOVATIVE SONIC