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Power-efficient data reception in a communication system with variable delay

A data grouping and communication network technology, applied in the field of communication, can solve problems such as the small amount of actual time and the unknown arrival time of packets

Inactive Publication Date: 2007-12-05
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual amount of time it takes to receive a packet may be small (e.g. less than 1ms), and may only be a fraction of the time interval between packets
Typically, the terminal does not know the precise arrival time of incoming packets due to various reasons such as variable delays observed for these packets

Method used

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  • Power-efficient data reception in a communication system with variable delay
  • Power-efficient data reception in a communication system with variable delay
  • Power-efficient data reception in a communication system with variable delay

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Embodiment Construction

[0022] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment or design described herein as "exemplary" should not be construed as preferred or superior to other embodiments or designs.

[0023] The energy-efficient data reception techniques described herein can be used in various communication systems and networks and in various types of calls. For clarity, the techniques are described below with specific reference to voice calls in communication systems including wireless networks.

[0024] FIG. 1 shows a communication system 100 comprising multiple communication networks operating together but independently of each other. Terminal 110 communicates with phone 170 via communication system 100 to make a voice call. Terminal 110 exchanges data with access point 130 within wireless network 120 . Wireless network 120 may provide wireless communication for any number of terminals, such as terminal 110 and laptop personal c...

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PUM

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Abstract

To conserve power, a terminal operates in a “power save” mode in which the terminal is in a “doze” state when there is a low probability of receiving an incoming packet and in an “awake” state when an incoming packet is expected. In the doze state, the terminal powers down as much circuitry as possible. The terminal transitions between states based on an “ON” window. The window size and placement are determined based on statistics of packet arrival times. The terminal enters the awake state at the start of the ON window, turns on the receiver, and monitors for an incoming packet. The terminal turns off the receiver after receiving the packet, updates the statistics of the arrival times, and computes the window size and placement for the next incoming packet. The terminal may selectively enable or disable the power save mode based on jitter in the arrival times.

Description

technical field [0001] The present invention relates generally to communications, and more particularly to techniques for receiving data in communications systems with variable delays. Background technique [0002] Communication systems are widely used to provide various communication services such as voice, packet data, and the like. Each type of service may have different characteristics and requirements. For example, packet data calls are often bursty in nature, but can usually tolerate variable amounts of delay. Thus, data packets can be transmitted based on the availability of system resources when they are generated. In contrast, voice calls typically generate voice data continuously over a range of rates and have relatively stringent latency requirements. [0003] A high-speed multiple-access communication system can simultaneously support different types of calls from different users. For voice calls, the terminal may receive voice data packets at regular interva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28
CPCH04W52/0232H04W24/00Y02B60/50H04L1/205Y02D30/70H04L12/28H04W52/02
Inventor R·普拉卡什
Owner QUALCOMM INC