CN1190980C - Channel distribution method for multiple services at base station in GPS system - Google Patents

Abstract

A kind of channel allocation method of GSM base station multi-service of the present invention, send signaling to base station by base station controller, carry out various configurations to base station, it is characterized in that, this configuration is dynamic configuration, comprises: 1) base station receives base station controller according to the parameters contained in the signaling, change the configuration of each channel in each carrier; 2) according to the different service types, perform different configurations through the base station controller in real time to adjust the bandwidth of the corresponding channel. Thus, the realization of GPRS business and the realization of EGPRS and other services after EDGE expansion and upgrade are guaranteed.

Description

Channel Allocation Method for Multiple Services in Global System for Mobile Communications Base Station

technical field

The invention relates to a multi-service channel allocation method of a global system for mobile communication (hereinafter referred to as GSM) base station.

GSM digital cellular mobile communication system is a time division multiple access (TDMA) system, one carrier is shared by 8 users (time division multiplexing). When processing a carrier, the GSM base station needs to simultaneously process all 8 time-division multiplexed time slots (Time Slot) on this carrier, that is, 8 channels. Each channel corresponds to a channel combination (channel combinations). This corresponding relationship is already configured when the base station is initialized. The GSM base station needs to perform baseband processing on each channel, mainly channel coding and decoding. This work is usually done by one or more digital signal processor (hereinafter referred to as digital signal processor (DSP)) chips.

Background technique

In the existing base station, one or more digital signal processors (DSP) process the channel of a carrier, and the bandwidth capacity occupied by each channel is 16Kbps, which can only provide voice and narrowband data services. The capacity of the hardware bus in the base station is evenly allocated to each channel, and each channel is the same, and the software also uses fixed hardware resources.

The existing technology cannot change the configuration of the base station controller (hereinafter referred to as BSC) to support the general packet radio service (hereinafter referred to as GPRS) and the enhanced general packet radio service (hereinafter referred to as EGPRS) after the EDGE extension and upgrade. EDGE is an enhanced data rate function that supports the evolution of the GSM system, and can increase the data rate on the wireless interface of the base station. Because in the baseband software, the capacity of each channel is allocated as a fixed size, the bandwidth of each channel cannot be expanded, so GPRS services and EGPRS services cannot be provided. In short, within a certain time range, on a carrier, if only one channel is working and the rest of the channels are idle, then the channel cannot use the remaining idle resources to expand its own bandwidth, so as to Support GPRS business and EGPRS business. Although this method of fixedly allocating bandwidth for each channel is very simple in implementation, it is practical and feasible in the case of original voice and narrowband data services, but it cannot adapt to the needs of GPRS services and EGPRS services.

Contents of the invention

The purpose of the present invention is to propose a kind of GSM base station to carry out the channel allocation method of multi-service in order to solve the defect of above-mentioned prior art, this method adopts the method to the base station dynamic configuration, supports the multiple business in the GSM system to work in the same on the platform. In addition to basic voice and data services, it also supports the application of GPRS services and EGPRS services.

The technical solution for realizing the purpose of the present invention is: a channel allocation method for carrying out multi-service to the base station of the global mobile communication system, through which the base station controller sends signaling to the base station, and various configurations are carried out to the base station, which is characterized in that, according to the digital The size of the free memory resources of the signal processor and its processing capability dynamically configure the base station, including the following steps:

1) The base station receives the signaling sent by the base station controller to perform channel configuration on parameters of different bandwidths;

2) The base station judges whether the current digital signal processor has enough free memory resources according to the signaling of the base station controller, and if the free memory resources are sufficient, increases the memory space required for new channel processing according to the signaling of the base station controller; If the free memory resource is not enough, the request of base station controller signaling is not supported;

3) Simultaneously estimate the processing capacity of the digital signal processor required for the newly added channel;

4) Estimate the sum of the processing capacity of the digital signal processor occupied by the existing channel and the processing capacity required by the new business, if the sum of the two processing capacities is less than the digital signal processor in the base station of the system For the total processing capacity of the GSM channel, the base station can increase the services required by the base station controller signaling, otherwise it will not be supported;

5) According to the estimation of the processing capacity of the digital signal processor carried out in step 4), the configuration of each channel in each carrier is changed in real time, and then the digital signal processor sends a signaling through the base station to tell the base station controller whether it can receive the base station After confirmation, provide the channel of the required service to the base station controller;

6) The base station controller adjusts the bandwidth of the corresponding channel in the base station through the real-time configuration of the base station; different types of services correspond to different bandwidths, and supports multi-service channel allocation.

The above-mentioned multi-service channel allocation method for a GSM base station, wherein the parameters of different bandwidths in step 1) refer to various service types of the channel and the amount of data to be processed in the channel.

Since the present invention adopts the above technical scheme, compared with the prior art, the present invention has the following advantages:

(1) The base station receives the signaling of the base station controller, and changes the configuration of each channel in each carrier according to the parameters of different bandwidths included in the signaling;

(2) By adjusting the configuration of digital signal processing and the ability to process each channel, the data rate that each channel can support can be changed to achieve a higher rate;

(3) The base station controller adjusts the bandwidth of the corresponding channel in the base station through the real-time configuration of the base station; different types of services correspond to different bandwidths, which expands the capacity and supports multi-service channel allocation.

Detailed ways

The specific performance characteristics of the present invention are further illustrated by the following examples.

In the existing technology, when the total capacity of hardware resources is fixed, the baseband software configures the base station differently according to the base station controller. At this time, the actually used channel bandwidth is fixed, and the total number of channels is also fixed. By adopting the method of the present invention, the bandwidth of each channel is no longer fixed, but can be changed flexibly, and the total number of channels is also variable.

A kind of channel assignment method that the present invention carries out multi-service to the base station of the global mobile communication system, is to carry out dynamic configuration to the base station according to the size of the free memory resource of the digital signal processor in the base station and its processing capacity, comprises the following steps:

1) The base station receives the signaling sent by the base station controller to configure the channel for parameters of different bandwidths; the parameters of different bandwidths refer to various service types of the channel and the amount of data to be processed in the channel;

2) The base station judges whether the current digital signal processor has enough free memory resources according to the signaling of the base station controller, and if the free memory resources are sufficient, increases the memory space required for new channel processing according to the signaling of the base station controller; If the free memory resource is not enough, the request of base station controller signaling is not supported;

3) Simultaneously estimate the processing capacity of the digital signal processor required for the newly added channel;

4) Estimate the sum of the processing capacity of the digital signal processor occupied by the existing channel and the processing capacity required by the new business, if the sum of the two processing capacities is less than the digital signal processor in the base station of the system For the total processing capacity of the GSM channel, the base station can increase the services required by the base station controller signaling, otherwise it does not support the requirements of the base station controller signaling;

5) According to the estimation of the processing capacity of the digital signal processor carried out in step 4), the configuration of each channel in each carrier is changed in real time, and then the digital signal processor sends a signaling through the base station to tell the base station controller whether it can receive the base station After confirmation, provide the channel of the required service to the base station controller.

6) The base station controller adjusts the bandwidth of the corresponding channel in the base station through the real-time configuration of the base station; different types of services correspond to different bandwidths, and supports multi-service channel allocation.

For example: if the base station controller is configured through signaling to require the base station to provide a channel for a certain user, and its service type is CS-3 service of GPRS, then the DSP knows that the actual channel bandwidth corresponding to this service is 32Kbps. After receiving the configuration command, the base station first checks whether the current digital signal processor DSP has enough free memory resources. If so, allocate a certain amount of memory according to the service type, otherwise a channel cannot be provided for the service; at the same time, estimate the processing capacity of the digital signal processor required for the newly added channel. Then estimate the processing capacity of the digital signal processor occupied by the existing channel and the processing capacity required by the new business, and calculate the sum of the processing capacity of the two, if the sum of the processing capacity of the two is less than that of the base station of the system The total processing capacity of the digital signal processor for the GSM channel, then the base station can increase the services required by the base station controller signaling, otherwise it will not support; after estimating the two resources mentioned above, the DSP will configure them, and at the same time the base station will The signaling tells the base station controller whether it can receive the configuration of the base station and provide the required service channel.

The digital signal processor in the base station of the present invention can process the channels of one or more carriers, and the bandwidth of each channel can be allocated dynamically, and its range varies from 16Kbps, 32Kbps to 64Kbps, according to the channel The specific application situation of the network determines the specific bandwidth within a certain time range. For example, in three consecutive time ranges A, B, and C, a channel of a certain carrier is successively assigned to users A, B, and C: in time range A, user A is making a call and using voice services, Then the baseband software allocates a bandwidth of 16Kbps to the channel; in time range B, user B uses the CS-3 service of GPRS, then the baseband software must occupy a bandwidth of 32Kbps; in time range C, user C uses EGPRS MCS-8 business, the baseband software needs to occupy hardware resources with a bandwidth of 64Kbps. It can be seen from this example that each channel of each carrier can support GPRS and EGPRS services through bandwidth adjustment. See the table below for the added supportable services: business type AIUR Abis oral rate GPRS CS-1 9.05Kbps Occupies a 16Kbps CS-2 13.4Kbps Occupies a 16Kbps CS-3 15.6Kbps Occupies two 16Kbps CS-4 21.4Kbps Occupies two 16Kbps ECSD data E-TCH 28.8Kbps Occupies two 16Kbps data E-TCH 32.0Kbps Occupies three 16Kbps data E-TCH 43.2Kbps Occupies three 16Kbps EGPRS MCS-1 8.8Kbps Occupies a 16Kbps MCS-2 11.2Kbps Occupies a 16Kbps MCS-3 14.8Kbps Occupies a 16Kbps MCS-4 17.6Kbps Occupies two 16Kbps MCS-5 22.4Kbps Occupies two 16Kbps MCS-6 29.6Kbps Occupies two 16Kbps MCS-7 44.8Kbps Occupies four 16Kbps MCS-8 54.4Kbps Occupies four 16Kbps MCS-9 59.2Kbps Occupies four 16Kbps

It can be seen from the above table that the original capacity of each channel is fixed at 16Kbps, which can only support voice and narrowband data services; however, after dynamic configuration of the base station, the capacity of each channel can be increased to several times the original capacity , for example: 16Kbps, 32Kbps, 64Kbps, etc. Based on this feature, the base station controller BSC can provide flexible services in different application occasions. For example, a baseband processing unit (digital signal processor) can process MCS-8 services with 32 channels at most, and through dynamic configuration, the maximum number of channels it can process with CS-1 services is 128. Each channel can not only provide voice and narrowband data services, but also support GPRS services and EGPRS services.

If the number of base station channels is insufficient, simply increase the number of base station processing unit hardware, supplemented by BSC configuration adjustment, and the system expansion can be completed. At the same time, the bandwidth of the channel can also be configured through the BSC background in real time to realize the overall regulation of resources.

Claims (2)

1, a kind of channel assignment method that carries out multi-service to the base station of the global mobile communication system, sends signaling to the base station through the base station controller, carries out various configurations to the base station, is characterized in that, according to the free memory resource of the digital signal processor in the base station The size and processing capability of the base station are dynamically configured, including the following steps: 1) The base station receives the signaling sent by the base station controller to perform channel configuration on parameters of different bandwidths; 2) The base station judges whether the current digital signal processor has enough free memory resources according to the signaling of the base station controller, and if the free memory resources are sufficient, increases the memory space required for new channel processing according to the signaling of the base station controller; If the free memory resource is not enough, the request of base station controller signaling is not supported; 3) Simultaneously estimate the processing capacity of the digital signal processor required for the newly added channel; 4) Estimate the sum of the two processing capacities of the processing capacity of the digital signal processor occupied by the existing channel and the processing capacity required by the new business, if the sum of the two processing capacities is less than the digital signal processing capacity in the base station of the Global System for Mobile Communications The total processing capacity of the signal processor for the GSM channel, then the base station can increase the services required by the base station controller signaling, otherwise it will not support the requirements of the base station controller signaling; 5) According to the estimation of the processing capacity of the digital signal processor carried out in step 4), the configuration of each channel in each carrier is changed in real time, and then the digital signal processor sends a signaling through the base station to tell the base station controller whether it can receive the base station After confirmation, provide the channel of the required service to the base station controller; 6) The base station controller adjusts the bandwidth of the corresponding channel in the base station through the real-time configuration of the base station; different types of services correspond to different bandwidths, and supports multi-service channel allocation. 2, a kind of channel assignment method that a kind of global system for mobile communication base station is carried out multi-service according to claim 1, it is characterized in that, the parameter of different bandwidth described in step 1) refers to the various business types and channel of channel The amount of data that needs to be processed.