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Method for reducing radio channel access delay in wireless communication system

A wireless communication system and wireless access technology, applied in 6] The present invention particularly relates to the field of accessing a GPRS system, which can solve the problems of increasing the probability of interrupting the access process, high access delay, etc.

Inactive Publication Date: 2004-04-21
NOKIA SIEMENS NETWORKS ITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0037] However, this strategy leads to a higher access delay, and increases the probability of interrupting the access process due to the timeout of the timer T3186

Method used

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  • Method for reducing radio channel access delay in wireless communication system
  • Method for reducing radio channel access delay in wireless communication system
  • Method for reducing radio channel access delay in wireless communication system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0053] Figure 1 shows a 52-multiframe for GPRS on PDCH. Each GPRS 52 multiframe carries 12 RLC blocks. Each RLC block consists of 4 TDMA time slots. (12*4 RLC time slots+4 idle frames=52 time slots).

[0054] figure 2 A generic PDCH of a GPRS 52 multiframe with different PRACH configurations is shown. In case 1, the PRACH slots are evenly distributed on the PDCH, and the entire PDCH is dedicated to the PRACH channel. Case 2 and Case 3 PRACH blocks with 6 and 2 PDCHs are dedicated to PRACH channels.

[0055] Consider the following performance metrics:

[0056] O is the input load on the PRACH, representing the average arrival of PRC messages in a multiframe containing up to the number of PRACH slots,

[0057] D is the service load of PRACH, which is the average number of PRC messages successfully sent without collision in a multiframe containing up to the number of PRACH slots,

[0058] G is the payload on the PRACH, which includes the additional load generated by retran...

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Abstract

A method for minimizing the access delay in wireless communication systems, e.g. GPRS (General Packet Radio Service) networks, which includes at least a base station system and at least a mobile terminal having a communication context with the GPRS network. The above mentioned mobile terminal is also adapted to open a communication context with the radio access network of said base station system to initiate a Temporary Block Flow or TBF establishment each time has to transmit data packets to the network and the TBF is released when the transmission of the packet has been completed. The TBF establishment is requested by means of a Radio Link Control message or RLC called Packet Channel Request or PCR sent on one of the Control Channel of the GPRS radio access and in particular on the Packet Random Access Channel or PRACH. The GPRS data packets and messages are organized in frame with a predetermined number of TDMA slots and in multiframe. According to the method, when the mobile has at least a Link Layer Control or LLC to transmit it send a PCR message on the PRACH and said PCR message is transmitted in a TDMA slot randomly selected on the TDMA slots that compose the first PRACH block.

Description

technical field [0001] The invention discloses a method for reducing access delay in a wireless communication system. The term "wireless communication system" generally refers to any communication system capable of wireless communication between a wireless communication device and a fixed part of the system as the user of the wireless communication device moves within the service area of ​​the system. [0002] In the following sections we refer specifically to GPRS (General Packet Radio Service) wireless communication systems, however, the invention is not limited thereto but can be applied to any wireless communication, including other extensions of GPRS, such as GPRS wireless access Improvements, ie, GERAN (GSM Edge Radio Access Network), or the application of GPRS concepts in 3GPP (Third Generation Partnership Project) networks. [0003] GPRS (General Packet Radio Service) networks have been standardized by ETSI (European Telecommunications Standards Institute) at the time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04W74/00H04W74/08H04W76/02H04W76/06H04W84/04
CPCH04W76/027H04W74/0866H04W76/18
Inventor 蒂齐亚纳·托尼亚蒂迪诺·赛加
Owner NOKIA SIEMENS NETWORKS ITAL