CN100366110C - Method for distributing baseband channel processing resource in mobile communication system base station - Google Patents
Method for distributing baseband channel processing resource in mobile communication system base station Download PDFInfo
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Abstract
The present invention relates to mobile communication, and discloses a method for allocating base band channel processing resource in a base station in a mobile communication system, which prevents and reduces the status effectively that the base band channel processing resource can not be allocated to a service with high capacity when enough resource exists in a base band channel processing resource pool, and thereby, the resource processing performance of the base station is enhanced. In the present invention, different allocating methods are used according to the amounts of the base band channel processing resource required by different services, and thereby, the resource allocation of CE kits is more compact.
Description
Technical Field
The present invention relates to mobile communications, and in particular, to a baseband processing technique of a base station system in the field of mobile communications.
Background
The cellular mobile communication system divides a service area into a plurality of cells, and each cell is provided with wireless coverage and services by a corresponding base station, thereby realizing large-area service provision. In a cellular mobile communication system, a mobile terminal is connected to a base station via a radio link. Although the base stations of different mobile communication systems are different, basically, in the digital mobile communication system, the base stations include wireless transceivers and baseband processing components, and mainly perform the functions of link synchronization, modulation and demodulation, coding and decoding, and the interconversion between baseband signals and radio frequency signals, wherein the processing of the wireless link baseband digital signals is performed by the baseband processing device.
The baseband processing device is usually implemented by an Application Specific Integrated Circuit (ASIC) and a Digital Signal Processor (DSP). As wireless transmission standards have evolved from the 2nd Generation to the third Generation (3 rd Generation, 3G) and beyond, data transmission has also been moving toward high-rate transmission of multimedia service information (voice, data and video), and compared with the existing Global System for mobile Communication (GSM) using 2G technology, the baseband processing capability required by the 3G System is at least an order of magnitude higher, and the base station is under pressure to meet the ever-increasing performance and bandwidth requirements, and the requirement for baseband processing equipment of the base station has also increased in multiples. At the same time, the demand of the system for baseband processing capacity increases much faster than the ability of the processing technology to provide the required processor speed, and since a single ASIC and DSP face technical limitations in providing the required functionality and performance, multiple ASICs and DSPs are typically used for parallel processing and real-time sharing to meet the baseband processing capacity of the base station.
In the third Generation mobile communication system (the 3rd Generation, abbreviated as "3G"), in order to better improve the utilization rate of baseband processing equipment, a concept of resource pool is introduced in the baseband processing part of a base station. For example, in a Wideband Code Division Multiple Access (WCDMA) system, which is one of the 3G standards, a shared resource pool concept is introduced in a baseband processing part of a base station, i.e., a Node B, and a transceiver unit thereof shares baseband channel processing resources. The resource pool of the baseband processing units in the base station is that all the baseband processing units are centralized and uniformly scheduled and distributed by the resource management module of the base station, so that dynamic management is realized, each processing unit can be more optimally utilized, and the utilization rate of the baseband processing equipment is improved.
In the base station, each ASIC, DSP group provides a part of the baseband processing capability for the whole baseband channel processing resource pool, which may be called a sub-unit pool (CE kits) of baseband processing. The processing of a set of radio links for a service is typically performed on only one CE kit. For different types of service radio link sets, for example, for 12.2Kbps Adaptive Multi-Rate (AMR) voice and 384Kbps Packet Switching (PS) service radio link sets in a WCDMA system, the required baseband processing capabilities are different, and the radio link sets established by various different services are completely random, so that the problem of how to optimally allocate CE kits to improve the utilization Rate of baseband processing equipment as much as possible exists. The effective management and use of CE kits is closely related to the baseband processing power and performance that can be provided by the base station in practical applications.
There are two existing schemes for the allocation of baseband channel processing resources. Since different traffic processing needs to allocate different baseband channel processing resources as described above, for convenience of explanation and understanding, the amount of baseband channel processing resources or baseband channel processing capacity is represented by the amount of baseband channel processing resource points (hereinafter referred to as "resource points"). Meanwhile, suppose that 1 resource point is needed for processing 12.2Kbps AMR voice, and that 16 resource points are needed for 384K PS service, and suppose that one CE kit has a baseband channel processing capability of 32 resource points, and the whole resource pool has 2 CE kits.
The technical scheme is that the CE kits are distributed in the most idle mode, namely, the CE kits with the minimum load are selected to distribute the baseband channel processing resources for the wireless link set of the new service. The technical scheme can be understood in such a way that the wireless link set of the new service is distributed to the CE kits with the largest number of residual resource points, and the main idea is to distribute the resources consumed by all baseband channel processing to all CE kits as evenly as possible.
Correspondingly, the technical scheme allocates two pairs of CE kits in the most busy mode, namely selects the CE kit with the largest load to allocate the baseband channel processing resources for the wireless link set of the new service. The technical scheme can be understood in such a way that the wireless link set of the new service is distributed to the CE kits with the least number of the remaining resource points, and the main idea is to use the baseband channel processing resources of other CE kits after the baseband channel processing resources of one CE kit are exhausted as much as possible. Meanwhile, after a certain wireless link set is reconfigured or softer combined, when the current CE kits can not provide enough channel processing resources, the scheme also adopts a channel moving strategy, and selects another CE kit which can provide baseband channel processing resources to allocate resources for the wireless link set of the service.
Those skilled in the art will appreciate that the channel relocation is essentially channel reallocation, and in software implementation, the original service resources are reallocated to the new CE Kits, and then the baseband channel processing resources already allocated to the original CE Kits are deleted, which may be needed when the number of users and the types of services used by the users are large.
For example, if there is a need to establish a radio link set of a new service with a baseband channel processing resource consumption resource point of 4, at this time, if the resource point of the remaining baseband channel processing resource of each CE kit is less than 4, but the remaining resource point of all CE Kits is greater than 4, the radio link set with a plurality of baseband channel processing resource consumption resource points less than 4 allocated to a certain CE kit can be moved to other CE Kits, so that the radio link set of the new service can be allocated to the CE kit. Generally, when allocating baseband channel processing resources for a new service, the following conditions are required to be satisfied when performing channel transfer: the remaining resources of any CE Kits cannot meet the requirements of a new radio link set; the total remaining resources of all CE Kits are needed to satisfy the new radio link set; some of the radio links already allocated in a certain CE kit can be reallocated to other CE Kits, and the remaining resources of the CE kit can meet the needs of the new radio link set.
In practical applications, the above scheme has the following problems: when the baseband channel processing resource pool has enough baseband channel processing resources, the baseband channel processing resources cannot be allocated to high-load services such as PS services, and thus the utilization rate of the baseband channel processing equipment is affected.
The main reason for this is that the prior art does not consider that the baseband channel processing resources consumed for processing the radio link sets of different types of services are different, and due to the randomness of service access, it is easy to happen that when there is enough baseband channel processing resources allocated to a new link in the resource pool, no CE kit can provide baseband channel processing resources for the new link alone.
For example, for the first technical solution, when the most idle allocation policy is adopted, if 17 resource points are allocated on each CE kit, at this time, 30 resource points remain in total for the baseband channel processing resource of the base station, and 16 resource points are larger than the baseband channel processing resource required by one 384Kpbs PS service, but since the processing of a radio link set corresponding to one service can be performed on only one CE kit, the remaining baseband channel processing resource of each CE kit is smaller than 16 resource points, and cannot process one 384Kbps PS service any more.
For the second prior art solution, in the case shown in table 1 below, the baseband channel processing resources of the link cannot be allocated to the new service of the terminal 5. Although the total remaining resources of the entire baseband channel processing resource pool can satisfy the terminal 5 activation 384Kbps service at this time, activation failure is caused because each CE kit cannot individually provide a baseband processing resource satisfying the terminal 5 activation 384Kpbs service.
TABLE 1
| Sequence of operations | CEkits1 load cases | CEkits2 load cases |
| After the terminal 1 is activated by 384K | 16 | 0 |
| After terminal 2 makes a 12.2K call | 17 | 0 |
| After the terminal 3 is activated by 384K | 17 | 16 |
| After terminal 1 is deactivated | 1 | 16 |
| After terminal 4 makes a 12.2K call | 1 | 17 |
| After the terminal 1 is activated again by 384K | 17 | 17 |
| Terminal 5 fails to activate 384K service | 17 | 17 |
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method for allocating baseband channel processing resources in a base station of a mobile communication system, so as to effectively avoid and reduce the situation that the baseband channel processing resources cannot be allocated for high-load services when sufficient resources exist in a baseband channel processing resource pool, thereby enhancing the base station resource processing performance.
In order to achieve the above object, the present invention provides a method for allocating baseband channel processing resources in a base station of a mobile communication system, wherein the base station allocates the baseband channel processing resources by using a resource pool, comprising the following steps:
a, dividing a new service into a large-demand service and a small-demand service according to a baseband channel processing resource demand value of the new service and a preset threshold, wherein for the large-demand service, the distribution method enters a step B, and for the small-demand service, the distribution method enters a step C;
b, selecting the baseband channel processing subunit pool with the maximum total load from the baseband channel processing subunit pools with the residual baseband channel processing resources larger than the baseband channel processing resource demand value of the new service, and distributing the baseband channel processing resources for the new service;
and C, selecting the baseband channel processing subunit pool with the largest sum of the small required service loads from the baseband channel processing subunit pools with the residual baseband channel processing resources larger than the baseband channel processing resource demand value of the new service, and distributing the baseband channel processing resources for the new service.
Wherein, the step A further comprises the following substeps:
a1: the base station acquires a baseband channel processing resource requirement value of a new service;
a2: determining a new service with the base band channel processing resource requirement value being greater than or equal to a preset threshold as a high-demand service, and determining a new service with the base band channel processing resource requirement value being less than the preset threshold as a low-demand service;
a3: and if the new service is a high-demand service, entering the step B, and if the new service is a low-demand service, entering the step C.
In addition, the step B further comprises the following substeps: and calculating the sum of the baseband channel processing resources distributed by each baseband channel processing subunit pool in the baseband channel processing subunit pool with the residual baseband channel processing resources larger than the baseband channel processing resource requirement value of the new service, selecting the baseband channel processing subunit pool with the maximum sum, and distributing the baseband channel processing resources for the service with the large requirement.
In addition, the step C further comprises the following substeps: and in the baseband channel processing subunit pool of which the residual baseband channel processing resources are greater than the baseband channel processing resource requirement value of the new service, calculating the difference between the sum of the baseband channel processing resources allocated to each baseband channel processing subunit pool and the baseband channel processing resources allocated to the service with the large requirement in the sum, selecting the baseband channel processing subunit pool with the largest difference, and allocating the baseband channel processing resources to the service with the small requirement.
In addition, the steps B and C respectively include the following steps: and when the channel moving condition is met, allocating baseband channel processing resources for the new service after the channel moving is carried out.
In addition, the channel moving condition is that the following requirements are met simultaneously:
the residual resource of each baseband channel processing subunit pool is smaller than the baseband channel processing resource demand value of the new service;
the sum of the residual resources of all the baseband channel processing subunit pools is greater than the baseband channel processing resource requirement value of the new service;
some services already allocated in a certain baseband channel processing subunit pool can be reallocated to other baseband channel processing subunit pools, and after reallocation, the remaining resources of the baseband channel processing subunit pool from which the part of services are removed are greater than the required value of the baseband channel processing resources of the new services.
In addition, the method also comprises the following steps:
and when the existing service is released or the service is reconfigured, carrying out channel moving, and moving the service which consumes less baseband channel processing resources to the subunit pool which has less residual baseband channel processing resources.
Further, the mobile communication system is a wideband code division multiple access system.
The technical scheme of the invention is mainly different from the prior art by comparing, and the method for allocating the baseband channel processing resources in the base station of the mobile communication system adopts different allocation modes according to the quantity of the baseband channel processing resources required by different services, so that the resource allocation of CE kits is more compact.
The technical scheme of the invention has the advantages that the method can realize the maximum resource allocation of partial CE kits to the greatest extent, and the rest CE kits keep idle states, thereby avoiding the occurrence of the condition that the resources are uniformly occupied by each CE kit, avoiding the condition that the baseband channel processing resources can not be allocated to high-load services when enough resources exist in the baseband channel processing resource pool to the greatest extent, improving the utilization rate of the baseband channel processing resources and improving the base station resource processing performance.
Drawings
Fig. 1 is a flowchart of a method for allocating baseband channel processing resources in a base station of a mobile communication system according to a first preferred embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The basic principle of the present invention is first explained. In consideration of the characteristic that the wireless link sets of different services occupy different baseband channel processing resources, the scheme of the invention establishes the baseband channel processing resources required by the wireless link sets for the new service during resource allocation, namely, the baseband channel processing resource requirement value of the new service sets a threshold, divides the new service into a large-demand service and a small-demand service, and accordingly adopts a corresponding allocation mode. Specifically, if the new service is a high-demand service, selecting the CE kit with the largest total load from the CE kits of which the remaining baseband channel processing resources are greater than the baseband channel processing resource demand value of the service, and allocating the baseband channel processing resources to the service; on the other hand, if the new service is a low-demand service, the CE kits with the largest sum of the low-demand service loads are selected from the CE kits with the residual baseband channel processing resources larger than the baseband channel processing resource demand value of the service, and the baseband channel processing resources are distributed to the service. Therefore, the occupation of idle CE kits by a wireless link set with less resource occupation can be reduced as much as possible, meanwhile, the CE kits which are distributed with more resources are filled by an infinite link set which occupies less resource points as much as possible, the utilization rate of a baseband channel processing resource pool can be improved to the maximum extent, and the maximum-efficiency application of the resources is achieved.
To better explain the above principle, the following description is made in conjunction with a first preferred embodiment of the present invention. The flow of the preferred embodiment is shown in FIG. 1. Wherein, similar to the above, the number of resource points represents the amount of baseband channel processing resources required by the new service. Meanwhile, suppose that 1 resource point is needed for processing 12.2Kbps AMR voice, and that 16 resource points are needed for 384K PS service, and suppose that one CE kit has a baseband channel processing resource with 32 resource points, and the whole resource pool has 2 CE kits.
First, step 110 is entered, and the base station obtains a baseband channel processing resource requirement value of a new service through a resource processing request of the new service requiring resource allocation. The resource processing request of the new service includes information that the new service needs baseband channel processing resources. After that, the resource management module of the base station will determine how to allocate the resources according to the above information and the occupation status of the baseband channel processing resource pool.
Then step 120 is entered, whether the required value of the baseband channel processing resource of the new service is greater than or equal to the preset threshold is judged, if yes, the new service is classified into the large-demand service class, and step 130 is entered, otherwise, the new service is classified into the small-demand service class, and step 140 is entered.
In the first preferred embodiment of the present invention, the resource point number of the threshold is set to be Th _ CE, the resource point number of each CE kit is Pt _ CE, the total number of the system CE kits is NCE, and meanwhile, the total resource point number of the baseband channel processing resource pool of one base station is easily obtained to be NCE × Pt _ CE. The number of resource points of the threshold satisfies 0 < = Th _ CE < Pt _ CE, and when Th _ CE =0, the same as the prior art is achieved.
In step 130, the sum of the allocated baseband channel processing resources, i.e., the number of resource points, for each CEKit is calculated, and the CEKit with the largest sum is selected to allocate the baseband channel processing resources for the service. In other words, the resource allocation for the new service is performed on the CE kits that can satisfy the processing requirement of the new service and have the least remaining baseband channel processing resources. In this embodiment, let the ith cekit already allocate Ni sets of radio links, where the number of resource points occupied by the jth set of radio links is Pr (i, j) (0 < = j < = Ni, pr (i, 0) = 0). It can be easily derived that the ith CEkit has been allocated the resource points of
Those skilled in the art will understand that the resource allocation in step 130 can be implemented according to Prt (i) and Pt _ CE at this time.
In step 140, after the processing requirement of the new service is satisfied and the baseband channel processing resource of the current service that consumes the baseband channel processing resource greater than the threshold is deducted, the resource allocation of the new service is performed on the CEkits with the least baseband channel processing resource left. In the first preferred embodiment of the present invention, the total resource point number of the ith CEkits with the consumed resource point number greater than or equal to Th _ CE isFrom this, it can be derived that the resource point number used after the ith CEkit deducts the resource point number greater than or equal to Th _ CE is
Those skilled in the art will appreciate that step 140 can now be implemented according to Prt (i) _ bt and Pt _ CEResource allocation in (1)。
In this embodiment, in step 130 and step 140, channel shifting may also be performed to meet the requirement of a new service. That is, when the existing service is released or the service is reconfigured, the service consuming less baseband channel processing resources is moved to the CE kits consuming less baseband channel processing resources. Since the channel shifting is exactly the same as the prior art, those skilled in the art can easily refer to the foregoing implementation and will not be described in detail here. In combination with the present embodiment, the channel shift needs to satisfy the following 3 conditions at the same time: the remaining resources of each CE kit are smaller than the base band channel processing resource requirement value of the new service; the sum of the remaining resources of all CE kits is greater than the baseband channel processing resource requirement value of the new service; some of the services already allocated in a certain baseband channel processing subunit pool can be reallocated to other CE kits, and the remaining resources of the CE kits are greater than the baseband channel processing resource requirement value of the new service.
In order to optimize the system, in another preferred embodiment of the present invention, the above channel shifting technique can be used to continuously adjust the resource allocation of CE kits. In this case, not only the addition or reconfiguration of the radio link triggers channel shift, but also channel shift is performed during the deletion of the radio link. By the method, the compact resource allocation mode of the CE bits is kept, partial CE kits are enabled to achieve the maximum resource allocation as much as possible, the rest CE kits are kept in a relatively idle state, and the phenomenon that resources are uniformly occupied in each CE kit is avoided.
In this embodiment, similarly according to the service establishment sequence described in table 1, when allocating the baseband channel processing resources of the CE kits, after currently accessing 2 channels of 384Kbps services and 2 channels of voice services, one channel of 384Kbps services can still be successfully accessed, as shown in table 2 below.
TABLE 2
| Sequence of operations | CEkits1 load cases | CEkit 2 load cases |
| After the terminal 1 is activated by 384K | 16 | 0 |
| After terminal 2 makes a 12.2K call | 17 | 0 |
| After the terminal 3 is activated by 384K | 17 | 16 |
| Terminal 1 deactivated | 1 | 16 |
| After terminal 4 makes a 12.2K call | 2 | 16 |
| After the terminal 1 is activated again by 384K | 18 | 16 |
| The terminal 5 successfully activates the 384K service | 18 | 32 |
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A method for allocating baseband channel processing resources in a base station of a mobile communication system, wherein the base station allocates the baseband channel processing resources by using a resource pool,
characterized in that the method comprises the following steps:
a, dividing a new service into a large-demand service and a small-demand service according to a baseband channel processing resource demand value of the new service and a preset threshold, wherein for the large-demand service, the distribution method enters a step B, and for the small-demand service, the distribution method enters a step C;
b, selecting the baseband channel processing subunit pool with the maximum total load from the baseband channel processing subunit pools with the residual baseband channel processing resources larger than the baseband channel processing resource demand value of the new service, and distributing the baseband channel processing resources for the new service;
and C, selecting the baseband channel processing subunit pool with the largest sum of the small required service loads from the baseband channel processing subunit pools with the residual baseband channel processing resources larger than the baseband channel processing resource demand value of the new service, and distributing the baseband channel processing resources for the new service.
2. The method as claimed in claim 1, wherein said step a further comprises the sub-steps of:
a1: the base station acquires a baseband channel processing resource demand value of a new service;
a2: judging the new service with the base band channel processing resource requirement value being more than or equal to a preset threshold as a high-demand service, and judging the new service with the base band channel processing resource requirement value being less than the preset threshold as a low-demand service;
a3: and if the new service is a high-demand service, entering the step B, and if the new service is a low-demand service, entering the step C.
3. The method as claimed in claim 1, wherein said step B further comprises the sub-steps of: and in the baseband channel processing subunit pool of which the residual baseband channel processing resources are greater than the baseband channel processing resource requirement value of the new service, calculating the sum of the baseband channel processing resources allocated to each baseband channel processing subunit pool, selecting the baseband channel processing subunit pool with the largest sum, and allocating the baseband channel processing resources to the service with large demand.
4. The method of claim 1, wherein the step C further comprises the following sub-steps: and in the baseband channel processing subunit pool with the residual baseband channel processing resources larger than the baseband channel processing resource requirement value of the new service, calculating the difference value between the sum of the baseband channel processing resources distributed by each baseband channel processing subunit pool and the baseband channel processing resources distributed to the service with large requirement in the sum, selecting the baseband channel processing subunit pool with the largest difference value, and distributing the baseband channel processing resources to the service with small requirement.
5. The method as claimed in any of claims 1 to 4, wherein the steps B and C further comprise the following steps: and when the channel moving condition is met, allocating baseband channel processing resources for the new service after the channel moving is carried out.
6. The method as claimed in claim 5, wherein the channel shifting condition is that the following requirements are satisfied:
the residual resource of each baseband channel processing subunit pool is smaller than the baseband channel processing resource requirement value of the new service;
the sum of the residual resources of all the baseband channel processing subunit pools is greater than the baseband channel processing resource requirement value of the new service;
some of the services already allocated in a certain baseband channel processing subunit pool may be reallocated to other baseband channel processing subunit pools, and after reallocation, the remaining resources of the baseband channel processing subunit pool from which the part of the services are removed are greater than the baseband channel processing resource requirement value of the new service.
7. The method of claim 6, further comprising the steps of:
and when the existing service is released or the service is reconfigured, carrying out channel moving, and moving the service which consumes less baseband channel processing resources to the subunit pool which has less residual baseband channel processing resources.
8. The method of claim 1, wherein the mobile communication system is a wideband code division multiple access system.
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| CN101232654B (en) * | 2007-01-25 | 2011-07-13 | 中兴通讯股份有限公司 | Base band resource pool system and control method thereof |
| CN101222671B (en) * | 2007-12-06 | 2010-12-15 | 华为技术有限公司 | Method, system and equipment for confirming inceptive service authorization value |
| CN102740326B (en) * | 2011-04-07 | 2015-02-04 | 中国移动通信集团公司 | Managing method and device for processing resources in BBU |
| CN102378186B (en) * | 2011-11-21 | 2018-08-07 | 南京中兴软件有限责任公司 | A kind of base station resource sharing system and method |
| CN103269519B (en) * | 2013-06-18 | 2016-09-28 | 中国科学院计算技术研究所 | A kind of processing resource allocation method and system in centralized base station framework |
| CN112752304B (en) * | 2019-10-31 | 2022-08-26 | 上海华为技术有限公司 | Method and related device for processing uplink reference signal |
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| CN1265811A (en) * | 1997-07-31 | 2000-09-06 | 诺基亚网络有限公司 | Method of controlling communication resources |
| JP2003087854A (en) * | 2001-09-13 | 2003-03-20 | Fujitsu Ltd | Base transceiver station |
| US6754714B1 (en) * | 1999-10-05 | 2004-06-22 | Cisco Technology, Inc. | Multilink point-to-point protocol network access server channel allocation method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1265811A (en) * | 1997-07-31 | 2000-09-06 | 诺基亚网络有限公司 | Method of controlling communication resources |
| US6754714B1 (en) * | 1999-10-05 | 2004-06-22 | Cisco Technology, Inc. | Multilink point-to-point protocol network access server channel allocation method and apparatus |
| JP2003087854A (en) * | 2001-09-13 | 2003-03-20 | Fujitsu Ltd | Base transceiver station |
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