CN101197746B - Base station ring-shaped network method in GSM system - Google Patents

Abstract

The invention provides a base station loop type networking method, including S102 procedure, Abis resources are divided into key carrier frequency resources and assistant carrier frequency resources, an unique resource time slot number is allocated for each key carrier frequency, the key carrier frequency resources and the assistant carrier frequency resources are allocated in the positive working direction of base stations; S104 procedure, Abis resources which are not used by each base station are two-way accessed to upper and lower level base stations; S106 procedure, when base stations change directions, the assistant carrier frequency resources which are in conflict with the key carrier frequency resources are searched in the negative working direction of base stations, if the assistant carrier frequency resources are found, the assistant carrier frequency resources are released; S108 procedure, the base stations which have changed directions give up all assistant carrier frequency work, the key carrier frequency of the base stations which have changed directions completes the reverse access by using released assistant carrier frequency resources or using unused resources of each base station if the conflicting assistant carrier frequency resources are not found. By the invention, the utilization ratio of the Abis resources is improved and the enough flexibility is provided for operators to choose.

Description

Base station ring-shaped network method in the gsm system

Technical field

The present invention relates to the communications field, relate in particular to base station ring-shaped network method in the gsm system.

Background technology

Usually adopt the mode of circuit transmission to connect between BSC in the gsm system (Base Station Controller, base station controller) and BTS (Base Transceiver Station, base station), modal is the E1 circuit of 2M.In the networking form, adopting ring-shaped network is a kind of common method that strengthens the base station functional reliability.Its principle is, the BTS end of cascade forms loop by the circuit BSC that is linked back; When between BSC and BTS or the circuit between cascade BTS when occur interrupting, the BTS that is disconnected by breakpoint can finish access from reverse circuit, thereby has promoted the reliability that the base station is inserted.

Under the form of static Abis resource allocation or half Flexible Abis resource allocation (speech resources static allocation, data service resource dynamic are distributed), cannot sharing A bis resource between website.This moment, ring-shaped network need all be the required Abis resource of base station assigns at both direction just, thereby had caused 1: 1 redundant configuration of transfer resource, had raised operating cost of operator.

Summary of the invention

In view of the above problems, the objective of the invention is to overcome in the existing ring network when realizing the base station commutation defective of can be from reverse access and must 1: 1 ground redundant configuration resource, a kind of base station ring-shaped network method based on Abis resource static allocation is provided, to reduce the redundant resource configuration, improve the Abis resource utilization.

The minimal service that BTS ring-shaped network method provided by the invention is based on the sub-district supports a kind of Abis ring network control mode that principle is carried out resource allocation.Be characterized in Abis resource utilization height, redundant resource is few, can improve the efficiency of operation of operator effectively; Simultaneously, when having enough transfer resources by oneself, operator is converted to the mode of operation of traditional ring-shaped network again easily, i.e. 1: 1 redundant fashion of Abis resource.

According to the base station ring-shaped network method based on Abis resource static allocation of the present invention, may further comprise the steps: step S102, with the Abis resource division is the minor carrier resource that is used for the crucial carrier frequency resource of crucial carrier frequency and is used for minor carrier, crucial carrier frequency is the carrier frequency that system need guarantee its resource allocation, minor carrier is the carrier frequency that does not influence the sub-district operate as normal after closing, be the unique resource timeslot number of each crucial carrier frequency distribution, and on the positive operative orientation of base station, distribute crucial carrier frequency resource and minor carrier resource, both direction at ring network is operation control time slot allocation resource, guarantees that BTS can receive the instruction of BSC from two operative orientations; Step S104 is with the two-way the superior and the subordinate base station that is routed to the base station of untapped Abis resource on each base station; Step S106 when the commutation of base station, seeks minor carrier resource with afoul all base stations of crucial carrier frequency resource of commutation base station according to the resource timeslot number on the opposite direction of commutation base station work, if find, then discharge afoul minor carrier resource; And step S108, the work of all minor carriers of self is abandoned in the commutation base station, the afoul minor carrier resource that discharged of crucial carrier frequency utilization of commutation base station or utilizing untapped Abis resource on each base station under the situation that does not find afoul minor carrier resource is finished reverse access.

Preferably, in above-mentioned ring-shaped network method, may further comprise the steps among the step S108: step S108-2, the work of all minor carriers of self is abandoned in the commutation base station, crucial carrier frequency and crucial carrier frequency resource is routed on the identical physical slot by time of predefined symmetrical ports to work on; And step S108-4, base station controller changes own on-position, receives the access of the base station of commutating on the resource of the identical time slot of new line.

Preferably, in above-mentioned ring-shaped network method, may further comprise the steps: step S110, when the base station need return on the operate as normal direction, continue all carrier frequency and resource and switch back on the port of positive direction work; Step S112, base station controller find out the base station and go up minor carrier and the minor carrier resource of abandoning owing to resource contention in all base stations of work in the other direction, instruct it to recover operate as normal; And step S114, base station controller is adjusted the line resource of local terminal access base station, adapts to the operating state of base station.

Preferably, in above-mentioned ring-shaped network method, on each the E1 circuit ring on the ring network, crucial carrier frequency can have identical resource timeslot number with minor carrier.

The implementation method of the Abis ring network that the present invention adopts is compared with traditional method, can dispose more carrier frequencies work in ring topology under the normal situation of transmission network, has improved the level of resources utilization of operator; When operator has higher requirements for network backup, can finish the ring-shaped network function of traditional redundancy backup mode again by configuration, for providing enough flexibilities, operator selects.

Description of drawings

Fig. 1 is the flow chart according to base station ring-shaped network method of the present invention;

Fig. 2 is the schematic diagram that inserts direction according to the BTS of the looped network in normal operation topological sum of the embodiment of the invention;

Fig. 3 is the schematic diagram that continues of the ring-shaped network base station Abis resource according to the embodiment of the invention;

Fig. 4 is the operative orientation schematic diagram after circuit interrupts between B1, B2 base station according to the embodiment of the invention;

Fig. 5 is according to the BTS of embodiment of the invention Abis resource when the commutation schematic diagram that continues; And

Fig. 6 discharges the resource schematic diagram when the Abis resource contention according to the BTS of the embodiment of the invention.

Embodiment

The present invention is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the flow chart according to base station ring-shaped network method of the present invention.

The method applied in the present invention is that the carrier frequency with the base station is divided into crucial carrier frequency (TRX) or minor carrier according to microzonation, discharges the access that resource guarantees crucial carrier frequency by abandon minor carrier when switching.May further comprise the steps:

Step S102, with the Abis resource division is crucial carrier frequency resource and minor carrier resource, be the unique resource timeslot number of each crucial carrier frequency distribution, and on the positive operative orientation of base station, distribute crucial carrier frequency resource and minor carrier resource, wherein, crucial carrier frequency is the TRX that system need guarantee its resource allocation, the needs such as BCCH carrier frequency that are generally the sub-district support the TRX of sub-district operate as normal, after being configured to close, minor carrier do not influence the carrier frequency resource of sub-district operate as normal, in addition, Abis ring network topology is described to the associating of two the interconnected cascade of tail end station topologys, the O﹠amp of BTS; M control time slot Resources allocation all on the both direction of ring network, guarantee that BTS can receive the instruction of BSC from two operative orientations, and on each E1 circuit ring of the website on the ring network, the shared resource timeslot number of crucial carrier frequency must be unique, and promptly the website in the looped network both sides cannot have the resource of identical timeslot number to be assigned to the crucial carrier frequency in both sides;

Step S104, each BTS (removes the vacant time interval resource of all e1 ports to distribute to this base station PS (packet switch, packet switching), CS (circuit switch, circuit switching) business and O﹠amp; M (operation﹠amp; Management, operation ﹠amp; Management) other all resources outside the control link circuit resource) is routed to the correspondence position of identical timeslot number of the port of predefined symmetry, thereby makes the two-way the superior and the subordinate base station that is routed to the base station, untapped transparent resource ground on each base station;

Step S106, when commutate in certain base station, carrier frequency resource (these carrier frequency must be minor carriers) according to resource timeslot number afoul all base stations of the crucial carrier frequency resource of searching and base station on the opposite direction of base station work if find, then discharges afoul minor carrier resource; And

Step S108, the work of all minor carriers of self is abandoned in the base station of commutation, the afoul minor carrier resource that discharged of crucial carrier frequency utilization of commutation base station or utilizing untapped resource on each base station under the situation that does not find afoul minor carrier resource is finished reverse access.

In addition, when BTS need return on the operate as normal direction owing to reasons such as transmission line answers, operate as normal was replied in BSC order base station, continued all carrier frequency and resource and switch back on the port of positive direction work in the base station; BSC finds out this BTS by the keystone resources comparison and goes up in the other direction among all BTS that work because minor carrier and resource that conflict discharges, instruct them to recover subsequent data and work, BSC adjusts the line resource of local terminal access base station simultaneously, adapts to the operating state of these base stations.

When carrier frequency all on the ring network and resource all, can be known during for keystone resources by instruction, the Abis resource must 1: 1 redundant configuration can finish the configuration of ring network.The system operating mode of this moment is identical with the working method of traditional Abis ring-shaped network.

Fig. 2 is the schematic diagram that inserts direction according to the BTS of the looped network in normal operation topological sum of the embodiment of the invention.

As shown in the figure, illustrated 4 BTS are divided into two groups, and B1 and B2 form a cascade station, and B4 and B3 form the topology at a cascade station; The terminal interconnected establishment of finishing ring network of two cascaded topologies; Each BTS guarantees that with oneself transparent two-way continuing of circuit resource of usefulness not the resource at other stations can two-wayly smoothly be passed through our station.

Fig. 3 is the schematic diagram that continues of the ring-shaped network base station Abis resource according to the embodiment of the invention.

As shown in Figure 3, TRX1 is defined as the crucial carrier frequency in sub-district, and TRX2 is a minor carrier; Under the normal operation, TRX1 and TRX2 can obtain the own circuit resource support works that is disposed; BTS guarantees that with oneself transparent two-way continuing of circuit resource of usefulness not the resource at other stations can two-wayly smoothly be passed through our station.

Fig. 4 is the operative orientation schematic diagram after circuit interrupts between B1, B2 base station according to the embodiment of the invention;

Work schematic diagram when switch the base station during ring-shaped network that proposes for the present invention as shown in Figure 4; As shown in the figure, the circuit of ring network interrupts between B1 and B2 base station, and operative orientation need be switched in the B2 base station.Then the auxiliary resources of oneself is abandoned in the B2 base station, and keystone resources is inserted from opposite direction; B3 abandons with the auxiliary resources that B4 will own conflict with the keystone resources of switching station (B2), guarantees that the circuit of the keystone resources of B2 can pass through smoothly.

Fig. 5 is the schematic diagram that continues of the BTS resource when switching according to the embodiment of the invention;

As shown in Figure 5, the BTS that switches abandons minor carrier (TRX2), does not carry out circuit connection.Corresponding BSC side meeting inaccessible its use because of the communicating interrupt of TRX2; The BTS that switches is routed to the reciprocal port of looped network work (port D) with crucial carrier frequency (TRX1), and at this moment this BTS brings into use the circuit resource of looped network b direction; BSC needs to adjust the information such as access interface of this BTS simultaneously, guarantees that this BTS is from the access of (b direction) in the other direction.

Fig. 6 is the schematic diagram that discharges resource according to the BTS of the embodiment of the invention when the resource contention.

As shown in Figure 6, when BTS switched (B2 among Fig. 4), working method was as follows:

(1) keystone resources of BTS and not constant with the auxiliary resources maintenance operating state of switching BTS generation resource contention;

(2) BTS will abandon with the auxiliary resources of switching BTS generation resource contention, and dismounting is about to continue;

(3) BTS guarantees that with transparent the continuing of circuit resource of auxiliary resources release switching BTS can utilize these circuit resources to insert BSC smoothly by this base station.

In sum,, realized under the normal situation of transmission network, can in ring topology, disposing more carrier frequencies work, improved the level of resources utilization of operator by technical scheme of the present invention; When operator has higher requirements for network backup, can finish the ring-shaped network function of traditional redundancy backup mode again by configuration, for providing enough flexibilities, operator selects.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. the base station ring-shaped network method in the gsm system is characterized in that, may further comprise the steps:

Step S102, with the Abis resource division is the minor carrier resource that is used for the crucial carrier frequency resource of crucial carrier frequency and is used for minor carrier, described crucial carrier frequency is the carrier frequency that system need guarantee its resource allocation, minor carrier is the carrier frequency that does not influence the sub-district operate as normal after closing, be the unique resource timeslot number of each described crucial carrier frequency distribution, and on the positive operative orientation of base station, distribute described crucial carrier frequency resource and described minor carrier resource, both direction at ring network is operation control time slot allocation resource, guarantees that the base station can receive the instruction of base station controller from two operative orientations;

Step S104 is with the two-way the superior and the subordinate base station that is routed to described base station of untapped described Abis resource on each described base station;

Step S106, when commutate in a described base station, on the opposite direction of commutation base station work, seek minor carrier resource with afoul all the described base stations of crucial carrier frequency resource of described commutation base station according to described resource timeslot number,, then discharge afoul minor carrier resource if find; And

Step S108, the work of all minor carriers of self is abandoned in described commutation base station, the described afoul minor carrier resource that the crucial carrier frequency utilization of described commutation base station is discharged or utilize the above untapped described Abis resource of described each described base station under the situation that does not find described afoul minor carrier resource is finished reverse access.

2. the base station ring-shaped network method in the gsm system according to claim 1 is characterized in that may further comprise the steps among the described step S108:

Step S108-2, the work of all minor carriers of self is abandoned in described commutation base station, described crucial carrier frequency and crucial carrier frequency resource is routed on the identical physical slot by time of predefined symmetrical ports to work on; And

Step S108-4, base station controller change own on-position, the access of the described commutation of reception base station on the resource of the identical time slot of new line.

3. the base station ring-shaped network method in the gsm system according to claim 1 and 2 is characterized in that may further comprise the steps:

Step S110 when described base station need return on the operate as normal direction, continues all carrier frequency and resource and switches back on the port of positive direction work;

Step S112, described base station controller find out described base station and go up described minor carrier and the minor carrier resource of abandoning owing to resource contention in all base stations of work in the other direction, instruct it to recover operate as normal; And

Step S114, described base station controller is adjusted the line resource of local terminal access base station, adapts to the operating state of described base station.

4. the base station ring-shaped network method in the gsm system according to claim 3 is characterized in that, on each the E1 circuit ring on the ring network, described crucial carrier frequency can have identical resource timeslot number with described minor carrier.

5. the base station ring-shaped network method in the gsm system according to claim 1 and 2 is characterized in that, on each the E1 circuit ring on the ring network, described crucial carrier frequency can have identical resource timeslot number with described minor carrier.

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