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Load sharing in multi-access systems

A multi-access and access network technology, applied in access restrictions, electrical components, network traffic/resource management, etc., to achieve high-capacity effects

Inactive Publication Date: 2008-01-02
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The problem with this approach is that the system relatively frequently reaches a situation where all access attempts have to go through a directed retry mechanism

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] In this specification, the following abbreviations are generally used:

[0032] GSM Global System for Digital Mobile Phones

[0033] WLAN wireless local area network

[0034] WCDMA Wideband Code Division Multiple Access

[0035] UMTS Universal Mobile Phone System

[0036] CSE circuit switching equipment

[0037] The number of U users

[0038] C capacity

[0039] SNR signal-to-noise ratio

[0040] Q quality

[0041] First some observations:

[0042] The quality of service provided generally degrades with the number of users served. This is true in both wide area and local area systems. The communication load at which quality and quality requirements are equal is expressed as "capacity".

[0043] Overall capacity is maximized when quality requirements are met in both wide area and local area systems. If this is not the case, there is "spare capacity" available in at least one system. When the communication load is below the overall capacity limit, several acce...

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Abstract

In a multi-access system, an access selection principle is achieved by selecting a signal strength threshold level (130-133) based on a determined load level (ULOCAL) in a first access network. A new user in an area commonly covered by more than one access networks attempts to allocate to the first access network if an experienced signal strength exceeds the signal strength threshold level (130-133). Communication utility can preferably be maximized or at least be taken into account by using suitable load level relativity. By increasing the threshold when the load level approaches the capacity limit, a first completely loaded access network is avoided. An opportunity which lets particularly well-suited users still can access to the first access network is gave. At the same time, since the preferred access is judged before the actual access attempts, control signalling can be significantly reduced even at very high traffic loads.

Description

technical field [0001] The present invention relates generally to multiple access wireless communication systems and in particular to load sharing apparatus and methods in such systems. Background technique [0002] It is likely that future wireless networks will include a large portion of multiple access networks. A typical example is a network consisting of a wide area coverage system that provides medium bit rate services to mobile users and supplemented by a local area coverage system that provides high bit rate services to users in hotspots. In such systems, both user behavior and system characteristics require better user quality, such as higher bit rates, provided in hotspots. [0003] Combination systems with heterogeneous, site-dependent quality requirements therefore arise. The overall capacity C can then be defined as satisfying the wide area (Q wide_min ) and local (Q local_min ) The maximum number of users U required by the quality: [0004] C=max{U:Q wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04W48/06H04W48/18
CPCH04W48/06H04W48/18H04W28/0236
Inventor M·普里此A·富鲁卡J·彼得森A·西蒙森H·卡林
Owner TELEFON AB LM ERICSSON (PUBL)