CN1133342C - Base station controller with multi-module structure - Google Patents

Abstract

A base station controller with a multi-module structure, including a system control switching module SCSM, several radio resource management modules RMM ₁ ~ RMM _n , several base station interface modules BIE ₁ ~ BIE _x , a large-capacity code conversion module TC and a mobile-oriented The trunk interface module A of the switching center MSC; several radio resource management modules RMM ₁ ~ RMM _n and the large-capacity pattern conversion module TC are directly connected to the system control switching module SCSM; each radio resource management module is connected to several base station interface modules BIE ₁ to BIE _n are connected; the trunk interface module A is connected with the large-capacity code conversion module TC or directly connected with the system control switching module SCSM. The invention has low cost, high system reliability and can conveniently expand capacity.

Description

A base station controller with multi-module structure

The invention relates to a mobile communication system, in particular to a base station controller with a multi-module structure in the mobile communication system.

In the public land mobile communication system, the base station controller is located between the mobile exchange and the base transceiver station, and is responsible for the management functions of the base station and the wireless channel. The base station controller generally includes a base station interface module BIE, a code conversion module TC, a control and management module CMM, a switching module, and so on. For mobile communication operators, the capacity of base station controllers affects their network operation efficiency and maintenance costs to a certain extent. This is mainly manifested in the following aspects: 1. If the capacity of a base station controller BSC is large, then network planning and maintenance management is very convenient (basically all cells in a place are managed by a BSC, in addition, if the base station controller If the number of BSCs is small, the number of OMC-Rs is also small); 2. The capacity of the base station controller BSC is large, and handover is less, which minimizes the load of the mobile switching center MSC. 3. When the network expands, the cells that the large-capacity base station controller needs to allocate are greatly reduced, making the network run faster and more efficient; 4. The large-capacity base station controller can reduce the number of A interface signaling links and reduce investment. 5. The cost of the base station controller BSC will decrease with the increase of the capacity, and the operation and maintenance cost of the operator can also be reduced. In order to meet the large-capacity and expandable requirements of the base station controller, the design of the base station controller generally adopts a multi-module structure design. The traditional multi-module base station controller is extended from a program-controlled switch with a multi-module structure. . Figure 1 is a structural diagram of a typical multi-module program-controlled switchboard. As shown in Figure 1, the multi-module program-controlled switch includes a central switching module CSM, peripheral switching modules PSM ₁ to PSM _n , and various device interface modules are connected to the peripheral switching modules. There is a hierarchical, tree-like structure between the three The relationship is characterized by the fact that each peripheral switching module is self-contained and can form a bureau independently. This structure can achieve large capacity and can be expanded.

The base station controller of the traditional multi-module structure is extended from the multi-module program-controlled switchboard. As shown in Fig. 2, the traditional base station controller with multi-module structure includes central switching module CSM′, peripheral switching modules PSM′ ₁ ～PSM′ _n , base station interface modules BIE ₁ ～BIE _m , and code conversion modules TC ₁ ～TC _n and the trunk interface modules A ₁ -A _n facing the mobile switching center MSC. As shown in Figure 2, similar to the multi-module program-controlled switch, the peripheral switching modules PSM' ₁ to PSM' _n are connected to the central switching module CSM', and the base station interface module, code conversion module and relay interface module are all connected to each On a peripheral switching module, the central switching module and the peripheral switching module each have a switching network and a module processor with the same capacity, so that each peripheral switching module has all the functions of the base station controller, self-contained, and can be formed independently . Although the traditional multi-module base station controller also has the characteristics of large capacity and expandability, it still has the following problems: 1. The cost is relatively high. According to this structure, each peripheral switching module must have a network switching unit, a base station interface equipment BIE unit, a code conversion and relay interface unit, a control unit, a clock unit, etc., and the central switching module provides communication between each peripheral module. The transfer function between the traffic channel and the signaling channel must have a large traffic processing capacity; 2. Since the assignment of the A interface circuit is completed by the mobile switching center MSC, the MSC assigns the connection The time slots of the A interface and the time slots of the connected Abis interface are not necessarily in the same peripheral switching module, so they need to be transferred through the central switching module. 3. Under the structure of this BSC, there is message communication between each peripheral switching module, and the communication volume is relatively large. When expanding the capacity, each peripheral switching module The database needs to be updated, which is inconvenient for system expansion.

The purpose of the present invention is to propose a base station controller with a novel multi-module structure that reduces costs, improves system reliability, and can facilitate system expansion.

A base station controller with a multi-module structure, including a system control switching module SCSM responsible for ground equipment management and unified processing of A-interface signaling, and several radio resource management modules RMM ₁ ~ responsible for radio resource management of related base stations and LAPD channel processing RMM _n , several base station interface modules BIE ₁ to BIE _x , a large-capacity pattern conversion module TC and a relay interface module A facing the mobile switching center MSC, characterized in that: the above-mentioned several radio resource management modules RMM ₁ to The RMM _n and the large-capacity code conversion module TC are directly connected to the system control switching module SCSM; each radio resource management module is connected to several base station interface modules BIE ₁ ~ BIE _n ; the trunk interface module A facing the mobile switching center MSC is connected to The large-capacity code conversion module TC is connected or directly connected with the system control switching module SCSM.

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a structural diagram of a typical multi-module program-controlled switchboard;

Fig. 2 is a structural diagram of a traditional multi-module base station controller;

Fig. 3 is a novel multi-module base station controller structural diagram proposed by the present invention;

Fig. 1 and Fig. 2 have been described above, and Fig. 3, which is the core of the present invention, will be described in detail below. As shown in Figure 3, the new multi-module base station controller includes a system control switching module SCSM, several radio resource management modules RMM ₁ ~ RMM _n , a large-capacity code conversion module TC, and several base station interface modules BIE ₁ ~ BIE _x , also includes a trunk interface module A facing the mobile switching center MSC. A certain number of base station interface modules BIE ₁ to BIE _n are connected to a certain radio resource management module, and all radio resource management modules RMM ₁ to RMM _n and the large-capacity code conversion module TC are directly connected to the system control switching module SCSM; In the solution of the present invention, the trunk interface module A facing the mobile switching center MSC can be directly connected to the system control switching module SCSM, and can also be connected in series to the large-capacity code conversion module TC.

In Fig. 3, each base station interface module BIE ₁ ~ BIE _x is connected to a base transceiver station BTS, and the trunk interface module A facing the mobile switching center MSC is connected to the mobile switching center MSC. Compared with the traditional multi-module base station controller shown in Figure 2, the entire base station controller BSC is divided into two modules from the module: system control module and radio resource management module. The system control module is responsible for the management of the ground equipment and the unified processing of the A interface signaling with the MSC interface; the radio resource management module is responsible for the radio resource management of the relevant base stations and the processing of the LAPD channel for communication with the base stations. In fact, the radio resource management module RMM _x in Fig. 3 is a part of the peripheral switch module PSM' in Fig. ₁ ~ RMM _n does not have switching function and control function, so it cannot form an independent bureau. The system control switching module SCSM in Fig. 3 integrates the control functions of the central switching module CSM and the peripheral switching module PSM' in Fig. 2, and has a core large-capacity switching network and system control functions.

Correspondingly, since the code conversion module TC is uniformly connected to the system control switching module SCSM, its capacity is the code conversion modules TC ₁ to TC _n connected to the peripheral switching modules PSM' ₁ to PSM' _n in Fig. 2 The sum of the capacity is a large-capacity pattern conversion module. Since the TC is uniformly connected to the system control switching module SCSM, as the core switching network that completes the channel switching task in the BSC, there may only be one in the system control switching module SCSM, and in the radio resource management modules RMM ₁ to RMM _n , only one There needs to be a semi-fixed exchange relationship. In this way, the switching relationship of the service channels of the whole system can be simplified, which is convenient for management.

It can be seen from the above that although in the novel multi-module base station controller proposed by the present invention, each radio resource management module cannot form an office independently, and must work together with the system control switching module SCSM to complete the function of the entire base station controller, which is in the base station It does not seem to show any advantages when the controller system has a small capacity, but it has outstanding advantages when used in large-capacity and expandable base station controllers: First, because the entire base station controller is only used in the system control switch There is a core switching network in the module SCSM, so only one switching network needs to be dynamically managed in the large-capacity base station controller. More importantly, the cost of the software and hardware of the entire system is reduced; secondly, because the system controls the switching module SCSM to process Information from the mobile switching center MSC, so the module processor in each radio resource management module is simplified, thereby improving the reliability of the system; finally, the radio resource management function is shared by each radio resource management module, each There is almost no connection between the wireless resource management modules, so the capacity can be easily expanded.

Claims (3)

1, a kind of base station controller of multi-module structure, comprise that the system that the A interface signaling is handled in a responsible ground installation management and unification controls Switching Module (SCSM), several are responsible for the RRM of relevant base station and the RRM module (RMM of LAPD Channel Processing ₁～RMM _n), several base-station interface modules (BIE ₁～BIE _x), a big capacity code conversion module (TC) and a TIM trunk interface module towards mobile switching centre (MSC) (A) is characterized in that:

Described several RRM modules (RMM ₁～RMM _n) directly link to each other with system's control Switching Module (SCSM) respectively with big capacity code conversion module (TC); Each RRM module and several base-station interface modules (BIE ₁～BIE _n) link to each other; TIM trunk interface module (A) towards mobile switching centre (MSC) links to each other or directly links to each other with system's control Switching Module (SCSM) with big capacity code conversion module (TC).

2, the base station controller of a kind of multi-module structure as claimed in claim 1 is characterized in that: described system's control Switching Module (SCSM) has a jumbo core switching network.

3, the base station controller of a kind of multi-module structure as claimed in claim 1 is characterized in that: the capacity of described code conversion module (TC) be each peripheral switching module in the traditional multi-module structure base station controller (PSM ' ₁～PSM ' _n) each code conversion module (TC of being connect ₁～TC _n) the capacity sum.

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