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Local exchange in radio access network

A technology of radio access network and radio base station, applied in the directions of wireless communication, network of provided telephone service, telephone communication, etc., can solve the problems of not easy to reduce, economically infeasible, expensive MSC, etc.

Inactive Publication Date: 2008-05-21
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution is not economically viable as MSCs are expensive and cannot easily be scaled down to accommodate the traffic generated in the cities they serve

Method used

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  • Local exchange in radio access network
  • Local exchange in radio access network
  • Local exchange in radio access network

Examples

Experimental program
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Embodiment Construction

[0037] Like numerals indicate like or corresponding elements throughout the several views. In addition, all control signaling on the control plane in the figure is represented by thick dashed lines and thick dashed arrows. Also, all circuit-switched connections on the user plane are indicated with thick lines and thick arrows.

[0038] In Fig. 1A, a conventional method of switching local calls in a radio access network is disclosed. In Fig. 1A, RNC 1 and MGW 2 in core network 3 are shown. The RBS 4 in a cellular RAN, eg UTRAN, serves the cell in which mobile stations A and B are present. Call switching takes place in the MGW and all call control takes place in the MSC with the help of the RAN. MGW has connections to PSTN and ISDN.

[0039] Mobile station A sends a call request to the RBS, in which it indicates B's mobile phone number. In response to the call request, a signaling connection 5 shown with dashed lines is established between A and the RNC. A further signalin...

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PUM

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Abstract

The invention relates to a telecommunication system, to a local media gateway, to an MSC server, to a radio base station and to a radio network controller for set-up, release and control of local calls in the telecommunication system. The telecommunication system comprises a core network and at least a radio access network (10, 11, 12), an MSC server (18), a central media gateway (MGW) (20) having a point of interconnection to the public switched telecommunication network and at least a radio access gateway (25, 26, 27) to each respective radio access network. A characteristic feature o the invention is that it comprises at least a local MGW (22; 23; 24) provided with switch means and geographically separated from the central MGW. The radio access gateway and the MSC server are provided with control logic for set-up and release of local calls in the respective radio access networks using the local MGW as switch. The local MGW is located in each radio access gateway or in base stations or in a RBS aggregation site connected to a plurality of radio base stations. Thereby the two legs of a local call need not be transported all the way to the MSC. Instead they are interconnected in the local MGW or the RBS aggregation site, thereby reducing costs and trombone effects.

Description

technical field [0001] The present invention generally relates to methods and nodes for local switching in a Radio Access Network (RAN). In particular, the present invention relates to the distribution of circuit switched (CS) traffic from a central switching node, commonly referred to as a Mobile Switching Center (MSC), to one or more local switching nodes in order to provide local switching for calls. [0002] Local switching can take place in a radio base station (RBS), a radio base station aggregation site or an access gateway to a radio access network, e.g. in a GSM base station controller (BSC), a radio network controller (RNC) in a WCDMA radio access network ), or to the 4G bearer gateway of the 3G cellular system. Background technique [0003] In first, second and third generation cellular systems, the exchange of voice calls and user data takes place in a central mobile switching center node MSC which interacts with a PSTN or ISDN network. [0004] The invention p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/66H04M7/00
CPCH04W88/14H04L29/06238H04W88/12H04L65/1026H04M7/006
Inventor N·瓦尔梅C·沃尔多
Owner TELEFON AB LM ERICSSON (PUBL)
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