CN1710902A - Admission control method using consulation mechanism - Google Patents
Admission control method using consulation mechanism Download PDFInfo
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Abstract
Method includes steps: (1) RNC accepts request for admittance of new service; (2) determining whether load level in current sub zone is lower than target value of load; if yes, executing step (3); if no, and there is controllable service or new service is controllable, then executing step (4); if no, and both of the existed services and new service is not controllable, then admittance is refused; (3) determining whether current sub zone is able to accept the new service; if yes, accepting admittance; if no, and there is controllable service in existed services or new service is controllable; then executing steps (4); if no, and both of existed services and new service is not controllable, then admittance is refused; (4) defining speed readjustment plan, and determining whether new service is acceptable after adjustment; if yes, according to the plan, adjusting speed of service, and accepting admittance; otherwise admittance is refused. Features are: taking full advantage of resources.
Description
Technical Field
The present invention relates to admission control technology, and more particularly, to an admission control method using a negotiation mechanism.
Background
A Wideband Code Division Multiple Access (WCDMA) system is a cellular mobile communication system with advanced performance, and a base station controller (RNC) is used as a control core of the radio resource management of the WCDMA system to manage and schedule the radio resources of the whole system.
Among them, the power resource of the air interface is one of the very important radio resources. In a WCDMA system, when a new service is admitted, the total interference level received by the system, i.e. the total wideband received power (RTWP), will increase for the uplink; for the downlink, the downlink transmission power of the base station, i.e. the carrier transmission power (TCP), will also be increased. In an overloaded system, the rise of RTWP or TCP may cause the call quality to be degraded, and in severe cases, a large area call drop may be caused.
Currently, in order to ensure the communication quality of the original service, the cell coverage and the resource utilization rate in the system, the RNC has adopted a certain admission control technology to control the cell access service. When a mobile user initiates a new call or applies for handover in a new cell, or adds a new service in an existing call process, or performs channel reconfiguration on an existing service, the RNC performs admission control. In a WCDMA system, admission control is performed separately in uplink and downlink, i.e. the whole admission control is divided into two parts: uplink admission control and downlink admission control, the RNC can admit a new service only if both the uplink and downlink admission control decide that the new service can be admitted. However, in the prior art, when performing uplink or downlink admission control, a "comparison" method is adopted for processing. The existing solutions are generally as follows: firstly, setting a user number threshold, and accessing a new user under the condition that the user number does not exceed the threshold; otherwise, refusing to access the new user; estimating the load level of the system after the new service is accessed, then comparing the load level estimation value with a preset load threshold, and if the load level estimation value does not exceed the load threshold, receiving the access request; otherwise, refusing the admission request; for example, setting a total downlink transmission power threshold of a base station, obtaining the current downlink transmission power of the base station, summing the downlink transmission power with a power estimated value set for a new service applying admission, if the obtained power sum is less than the total downlink transmission power threshold of the base station, accessing the new service, otherwise, refusing to access the new service; and thirdly, setting other thresholds according to the management requirement to compare to determine whether to access the new service.
In the WCDMA system, the services can be divided into real-time and non-real-time services according to the service performance requirements of the services; the traffic can also be classified into controllable and uncontrollable traffic according to controllability of the load caused by the traffic. Controllable services refer to those services that are not sensitive to delay, i.e. non-real-time services, such as: packet services and adaptive multi-rate (AMR) voice services, etc.; uncontrollable traffic refers to those traffic that are delay sensitive, have rate or minimum rate limitations, i.e. real-time traffic, such as: AMR voice services at minimum rates, etc. The load generated by the controllable service is a controllable load, and the load generated by the uncontrollable service is an uncontrollable load, so that the cell load is composed of the controllable load and the uncontrollable load. Therefore, both the existing service of the system and the service requesting access may be controllable services, and the generated load may also be controllable load. Thus, for these controllable services, the system can not only perform admission control by means of comparison, but also control access of new services by means of adjusting the rate of the controllable services, i.e. performing service negotiation, thereby maximizing system capacity and making full use of wireless resources.
However, the existing admission control schemes do not consider the service negotiation for the controllable services, and only use an absolute "comparison" method to control the access of new services, so that some new services that could be accessed through the service negotiation are also denied to be accessed, and therefore, the existing technical schemes cannot fully utilize system resources to perform admission control.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide an admission control method using a negotiation mechanism, so that when performing admission control, an RNC performs service negotiation on an existing controllable service of a system and a new service for which admission is applied, thereby maximizing system capacity and fully utilizing radio resources of the system.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention discloses an admission control method using a negotiation mechanism, which mainly comprises the following processing steps:
after receiving an admission request of a new service, the RNC obtains a new service type according to the service performance requirement of the new service in the admission request, simultaneously obtains a load measurement value of a current access cell and analyzes the composition of the current existing service to obtain the load level of the current cell and the existing service condition of the current cell;
b. judging whether the current cell load level is lower than a cell load target value, if so, executing the step c; if the current cell load level is higher than the cell load target value and the controllable service exists in the existing services or the new service is the controllable service, executing the step d; if the current cell load level is higher than the cell load target value and both the existing service and the new service are uncontrollable services, rejecting the admission request and ending the admission control;
c. judging whether the current cell can be accessed to the new service, if so, receiving the access request and ending the access control; if the new service can not be accessed, and the existing service has controllable service or the new service is controllable service, executing step d; if the new service can not be accessed and the existing service and the new service are uncontrollable services, rejecting the admission request and ending the admission control;
d. determining a rate adjustment scheme of controllable service, controllable new service or a combination of the controllable new service and the controllable new service in the existing service according to the current existing service condition and the new service type, judging whether the current cell can access the new service after the rate is adjusted according to the scheme, if so, adjusting the rate according to the rate adjustment scheme, receiving the admission request, and ending the admission control; otherwise, refusing the admission request and ending the admission control.
In step c, the method for judging whether the current cell can access the new service is as follows:
estimating the load level of the cell after the new service is accessed, judging whether the estimated load level of the cell is higher than a cell load target value, if so, the current cell can not access the new service; otherwise, the current cell can access the new service.
In step c, the method for judging whether the current cell can access the new service is as follows:
estimating the current available bandwidth of the system, judging whether the estimated available bandwidth of the system is smaller than the request rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service.
Wherein, when there is no controllable service in the current existing service and the new service is a controllable service, in step d,
the rate adjustment determining scheme specifically comprises: estimating the current available bandwidth of the system, and setting the access rate of the new service as the estimated available bandwidth of the system;
the method for judging whether the cell can access the new service comprises the following steps: judging whether the estimated available bandwidth of the system is smaller than the minimum rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and configuring the estimated available bandwidth of the system for the new service as the access rate.
Wherein, when there is no controllable service in the current existing service and the new service is a controllable service, in step d,
the rate adjustment determining scheme specifically comprises: setting the access rate of the new service as the system available bandwidth estimated in the step c;
the method for judging whether the cell can access the new service comprises the following steps: c, judging whether the estimated system available bandwidth is less than the minimum rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and configuring the estimated available bandwidth of the system for the new service as the access rate.
Wherein, when there is controllable service in the current existing service and the new service is uncontrollable service, in step d,
the rate adjustment determining scheme specifically comprises: setting the rate of the existing controllable service;
the method for judging whether the cell can access the new service comprises the following steps: estimating the available bandwidth of the system after the rate of the existing controllable service is adjusted according to the rate adjustment scheme, judging whether the estimated available bandwidth of the system is smaller than the request rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service; or,
estimating the cell load level of the new service accessed after the existing controllable service rate is adjusted according to the rate adjustment scheme, and then judging whether the estimated load level is higher than a load target value, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and adjusting the rate of the existing controllable service according to the rate adjustment scheme.
Wherein, when there is controllable service in the current existing service and the new service is controllable service, in step d,
the rate adjustment determining scheme specifically comprises: setting the speed of the existing controllable service, estimating the available bandwidth of the system after the speed of the existing controllable service is adjusted according to the speed adjusting scheme, and setting the access speed of the new service as the estimated available bandwidth of the system;
the method for judging whether the cell can access the new service comprises the following steps: judging whether the estimated available bandwidth of the system is smaller than the minimum rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and adjusting the rate of the existing controllable service according to the rate adjustment scheme, and configuring the estimated available bandwidth of the system for the new service as the access rate.
Wherein, when there is controllable service in the current existing service and the new service is controllable service, in step d,
the rate adjustment determining scheme specifically comprises: setting the speed of the existing controllable service and the new service;
the method for judging whether the cell can access the new service comprises the following steps: estimating the cell load level of the new service after adjusting the existing controllable service and the new service rate according to the rate adjustment scheme, judging whether the estimated load level is higher than a load target value, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and adjusting the speed of the existing controllable service according to the speed adjusting scheme, and configuring the new service speed set in the speed adjusting scheme for the new service as the access speed.
Wherein, when there is a controllable service in the current existing services and the new service is a controllable service, in step c, before the step d is executed, the method further includes: estimating the current available bandwidth of the system, judging whether the estimated available bandwidth of the system in the step c is smaller than the minimum rate of the new service, if so, executing the step d; otherwise, the estimated system available bandwidth is configured for the new service as the access rate, the admission request is received, and the admission control is finished.
Wherein, when there is a controllable service in the current existing services and the new service is a controllable service, in step c, before the step d is executed, the method further includes: judging whether the estimated system available bandwidth in the step c is smaller than the minimum rate of the new service, if so, executing the step d; otherwise, the estimated system available bandwidth is configured for the new service as the access rate, the admission request is received, and the admission control is finished.
Wherein, when there is a controllable service in the current existing services, in step d, the step of rejecting the admission request further includes: judging whether all the existing controllable service rates are set to respective minimum rates in the rate adjustment scheme, and if so, rejecting the admission request; otherwise, re-executing step d.
Wherein, when there is a controllable service in the current existing services and the new service is a controllable service, in step d, the step of rejecting the admission request further includes: judging whether all the existing controllable services and the new service rates are set to respective minimum rates in the rate adjustment scheme, and if so, rejecting the admission request; otherwise, re-executing step d.
When there is a controllable service in the current existing services and the new service is a controllable service, the step of rejecting the admission request further includes: judging whether the minimum rate of the new service is 0, if so, configuring 0 rate for the new service as an access rate, and receiving an access request; otherwise, the admission request is refused.
Wherein, when the current access request is the access request of the same frequency switching, in step d, after the new service is judged to be accessed, the processing steps are as follows: and b, proposing a proposal for rate reconfiguration to the estimated available bandwidth of the system for the new service, reconfiguring the self access rate of the new service to the available bandwidth of the system according to the proposed proposal, and re-sending an admission request to return to the step a.
Wherein, when the current access request is the access request of the same frequency switching, in step d, after the new service is judged to be accessed, the processing steps are as follows: and b, adjusting the speed of the existing controllable service according to the speed adjusting scheme, proposing a proposal for reconfiguring the access speed into a new service speed set in the speed adjusting scheme for the new service, reconfiguring the self access speed into the new service speed set in the speed adjusting scheme according to the proposed proposal for the new service, and re-sending an admission request and returning to the step a.
After the minimum rate of the new service is judged to be 0, the processing steps are as follows: and b, proposing a proposal of reconfiguring the access rate to 0 rate for the new service, reconfiguring the self access rate to 0 rate by the new service according to the proposed proposal, and re-sending an admission request to return to the step a.
The key point of the invention is that: when the RNC decides that a new service cannot be accessed at the requested rate, the RNC does not directly reject the admission request, but performs service negotiation, that is: setting a rate adjustment scheme of controllable service or controllable new service or a combination of the controllable service and the new service in the existing service, and then judging whether the new service can be accessed after the rate of the controllable service or the controllable new service or the combination of the controllable service and the new service in the existing service is adjusted according to the rate adjustment scheme by estimating the load level of a new service access cell or the available bandwidth of a system on the basis of the rate adjustment scheme, thereby determining whether to accept the admission request.
Therefore, the admission control method using the negotiation mechanism provided by the invention can fully utilize the service performance requirement of the controllable service and provide a set of complete admission strategies considering the service negotiation so as to better utilize the system resources and maximize the system capacity.
Drawings
FIG. 1 is a flow chart illustrating admission control for case one according to a preferred embodiment of the present invention;
FIG. 2 is a flowchart illustrating admission control for case two according to a preferred embodiment of the present invention;
FIG. 3 is a flowchart illustrating admission control for case three according to a preferred embodiment of the present invention;
FIG. 4 is a flowchart illustrating admission control for case four according to a preferred embodiment of the present invention;
figure 5 is a flowchart of a preferred embodiment of admission control for case six according to the present invention;
FIG. 6 is a flowchart illustrating a preferred embodiment of the method for admission control in case seven according to the present invention;
figure 7 is a flow chart of admission control for case eight according to a preferred embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the method of the invention, the new service types applied for admission are divided into: controllable services and uncontrollable services; the existing service situation of the current cell is divided into: no controllable service and controllable service; setting a cell load target value and dividing the current cell load level into: the cell load is above the load target value and the cell load is below the load target value. In the following embodiments, in the new service, a controllable service is denoted as C, and an uncontrollable service is denoted as NC; in the existing service condition of the current cell, no controllable service is expressed as CSN, and controllable service is expressed as CSI; and in the current cell load level, the value that the cell load is higher than the load target value is represented as H, and the value that the cell load is lower than the load target value is represented as L.
According to the above-mentioned provisions of the method of the present invention, admission control can be divided into the following eight cases:
in case one, the current cell load level is L, the existing service condition of the current cell is CSN, and the new service type is NC.
And a second situation, wherein the current cell load level is L, the existing service condition of the current cell is CSN, and the new service type is C.
And a third situation, wherein the load level of the current cell is L, the existing service condition of the current cell is CSI, and the new service type is NC.
And the situation IV, the load level of the current cell is L, the existing service situation of the current cell is CSI, and the new service type is C.
And a fifth situation, the load level of the current cell is H, the existing service condition of the current cell is CSN, and the new service type is NC.
And a sixth situation, the load level of the current cell is H, the existing service condition of the current cell is CSN, and the new service type is C.
And a seventh situation, the load level of the current cell is H, the existing service condition of the current cell is CSI, and the new service type is C.
And the situation eight, the load level of the current cell is H, the existing service condition of the current cell is CSI, and the new service type is NC.
In the method of the invention, the system sets a load target value for each cell in advance, and after the RNC receives an admission request of a new service, the main processing steps are as follows:
after receiving an admission request of a new service, the RNC obtains a new service type according to the service performance requirement of the new service in the admission request, simultaneously obtains a load measurement value of a current access cell and analyzes the composition of the current existing service to obtain the load level of the current cell and the existing service condition of the current cell;
b. judging whether the current cell load level is lower than a cell load target value, if so, executing the step c; if the current cell load level is higher than the cell load target value and the controllable service exists in the existing services or the new service is the controllable service, executing the step d; if the current cell load level is higher than the cell load target value and both the existing service and the new service are uncontrollable services, rejecting the admission request and ending the admission control;
c. judging whether the current cell can be accessed to the new service, if so, receiving the access request and ending the access control; if the new service can not be accessed, and the existing service has controllable service or the new service is controllable service, executing step d; and if the new service can not be accessed and the existing service and the new service are both uncontrollable services, rejecting the admission request and ending the admission control.
d. Determining a rate adjustment scheme of controllable service, controllable new service or a combination of the controllable new service and the controllable new service in the existing service according to the current existing service condition and the new service type, judging whether the current cell can access the new service after the rate is adjusted according to the scheme, if so, adjusting the rate according to the rate adjustment scheme, receiving the admission request, and ending the admission control; otherwise, refusing the admission request and ending the admission control.
Based on the main processing steps of the method, the admission control of the eight cases is described below with reference to the accompanying drawings.
For case one: the load level of the current cell is L, the existing service condition of the current cell is CSN, the type of the new service is NC, the system adopts a one-time comparison method to judge whether the new service can be accessed at the requested speed, thereby determining whether the new service is accessed. Figure 1 is a flow chart of admission control according to a preferred embodiment of the present invention. As shown in fig. 1, the specific processing steps are as follows:
step 101: and the RNC estimates the load level of the whole cell after the new service is admitted according to the parameters such as the load measurement value of the current cell, the request rate and the service type in the service performance requirement of the new service and the like.
The method of the present invention may use the measured value of the base station of the total uplink interference or total downlink transmission power of the cell as the cell load, or may use the load factor of the service throughput rate or the device demodulation capability as the definition of the load, but is not limited to the above definition, and also includes the load definition that may be used for the correlation analysis and newly appeared in the future technology development; when estimating the load level of a cell after the new service is accessed, if a new service request is generated because the rate of a certain link is increased from low by a correlation algorithm, subtracting the existing load of the link from the load of the current cell, and estimating the load level of the whole cell after the new service is accessed according to the request rate of the new service and the like.
In addition, the estimation method of the cell load, the load measurement index used and the specific scheme of converting the load measurement value into the load index are not limited to one, different load estimation methods, load measurement indexes and schemes of converting the load measurement value into the load index can be adopted according to actual needs, and the load estimation method, the load measurement index and the scheme of converting the load measurement value into the load index are not the key points of the invention, so that the detailed description is not given here.
Step 102: judging whether the cell load level estimation value obtained in the step 101 is larger than the load target value of the cell, if so, turning to a step 103; otherwise, go to step 104.
Step 103: and refusing the admission request and ending the admission control.
Step 104: and receiving the admission request and finishing admission control.
The system available bandwidth is the maximum rate available for the new service, which is calculated by using the current load level measurement result and the service type in the new service performance requirement and other parameters under the limitation of the cell load target value. Therefore, here, it is also possible to estimate the available bandwidth of the system for admission control after accessing the new service, and then the above steps 101 and 102 become:
step 101: RNC calculates the available bandwidth of the current system according to the current load level measurement result, the service type in the new service performance requirement and other parameters; step 102: judging whether the estimated system available bandwidth in the step 101 is smaller than the request rate in the new service performance requirement, if so, turning to a step 103; otherwise, go to step 104; here, the specific method for estimating the available bandwidth of the system is not important in the present invention, and thus will not be described in detail.
For case two: the load level of the current cell is L, the existing service condition of the current cell is CSN, the new service type is C, the system firstly judges whether the new service can be accessed at the request rate, if so, the system accepts the access request; otherwise, determining the rate adjustment scheme of the new service: and setting the access rate of the new service as the estimated system available bandwidth, and then judging whether the new service can be accessed to the cell by the system available bandwidth, thereby deciding whether to access the new service by the system available bandwidth or reject the admission request. Figure 2 is a flow chart of admission control according to a preferred embodiment of the present invention for case two. As shown in fig. 2, the specific processing steps are as follows:
step 201: and the RNC estimates the load level of the whole cell after the new service is admitted according to the load measurement value of the current cell and the request rate and the service type in the service performance requirement of the new service.
Step 202: judging whether the cell load level estimation value obtained in the step 201 is larger than the load target value of the cell, if so, executing a step 203; otherwise, step 207 is performed.
Step 203: the system estimates the available bandwidth of the system after the new service is admitted according to the current cell load measurement value and the service type in the service performance requirement of the new service, and determines the rate adjustment scheme of the new service, namely: and setting the access rate of the new service as the estimated available bandwidth of the system.
Such as: when the measured value of the base station of the downlink carrier transmission power is taken as the measured value of the cell load, if the current carrier transmission power is 75%, the new service is the AMR voice service, and the current cell load threshold, i.e., the carrier transmission power threshold, is 80%, the current supported rate can be estimated to be 10kbps, and therefore, the current available bandwidth of the system is 10 kb.
Step 204: judging whether the estimated system available bandwidth in step 203 is smaller than the minimum rate requirement in the new service performance requirement, if yes, turning to step 205; otherwise, go to step 206.
Step 205: and refusing the admission request of the new service and ending the admission control.
Step 206: the available bandwidth estimated in step 203 is configured as the access rate of the new service.
Because the available bandwidth of the system is estimated under the limit of a certain system load threshold, the new service is accessed by the available bandwidth, namely the estimated available rate, and the cell load is not overproof.
When the method of the invention is used for configuring the available rate for the new service, the maximum rate in the service performance requirement of the new service is not modified, and the rate for configuring the new service can be completed by basic resource configuration.
Step 207: and receiving the admission request of the new service and finishing admission control.
In addition, here, the available bandwidth of the system after accessing the new service may be estimated first, and then the above steps 201 to 204 become:
step 201: RNC calculates the available bandwidth of the current system according to the current load level measurement result, the service type in the new service performance requirement and other parameters; step 202: judging whether the estimated system available bandwidth in step 201 is smaller than the request rate in the new service performance requirement, if so, turning to step 204; otherwise, go to step 207; step 203 is cancelled; step 204: judging whether the estimated system available bandwidth in step 201 is smaller than the minimum rate in the new service performance requirement, if so, turning to step 205; otherwise, go to step 206.
For case three: the load level of the current cell is L, the existing service condition of the current cell is CSI, the new service type is NC, the system firstly judges whether the new service can be accessed at the request rate, if so, the admission request is accepted; otherwise, determining the existing controllable service rate regulation scheme, and then judging whether to access the new service on the basis of the rate regulation scheme, thereby deciding whether to access the new service or reject the admission request after regulating the rate of the existing controllable service according to the rate regulation scheme. Figure 3 is a flow chart of admission control according to a preferred embodiment of the present invention for case three. As shown in fig. 3, the specific processing steps are as follows:
step 301: and the RNC estimates the load level of the whole cell after the new service is admitted according to the load measurement value of the current cell and the request rate and the service type in the service performance requirement of the new service.
Step 302: judging whether the cell load level estimation value obtained in the step 301 is larger than the load target value of the cell, if so, turning to a step 303; otherwise, go to step 308.
The processing in step 301 and step 302 may also be:
step 301: RNC calculates the available bandwidth of the current system according to the current load level measurement result, the service type in the new service performance requirement and other parameters; step 302: judging whether the estimated system available bandwidth in the step 301 is smaller than the request rate in the new service performance requirement, if so, turning to a step 303; otherwise, go to step 308.
Step 303: and determining the existing controllable service rate adjustment scheme of the cell.
Here, the rate adjustment scheme is set by the RNC according to the service performance requirement of each existing controllable service of the cell, and may be set to reduce the rate of all the existing controllable services by one or several levels until the rate is reduced to the minimum rate specified by its respective service performance requirement, or may be set to reduce the rate of part of the existing controllable services by one or several levels until the rate is reduced to the minimum rate specified by its respective service performance requirement.
Step 304: the load level of the entire cell after adjusting the existing controllable service rate and accessing the new service according to the rate adjustment scheme determined in step 303 is estimated. Here, the requested rate in the new traffic service performance requirement is used in estimating the load level.
Step 305: judging whether the cell load level estimation value obtained in the step 304 is larger than the load target value of the cell, if so, turning to a step 306; otherwise, go to step 307.
The processing in step 304 and step 305 may be:
step 304: based on the rate adjustment scheme set in step 303, the RNC calculates the available bandwidth of the current system according to the current load level measurement result, the service type in the new service performance requirement, and other parameters; step 305: judging whether the estimated system available bandwidth in step 304 is smaller than the request rate in the new service performance requirement, if so, turning to step 306; otherwise, go to step 307.
Step 306: and refusing the admission request of the new service and ending the admission control.
Step 307: and adjusting the rate of the existing controllable service in the cell according to the rate adjustment scheme determined in step 303. Here, when adjusting the rate of the existing service, a scheme of dynamic channel configuration may be used to complete the rate adjustment, but the invention is not limited to which scheme is specifically adopted to perform the rate adjustment, and does not affect the effectiveness of the invention.
Step 308: and receiving the admission request of the new service and finishing admission control.
In addition, according to the actual system design requirement, if the system requires as many access services as possible, step 306' may be further included before step 306: judging whether all the existing controllable service rates in the determined rate adjustment scheme are set as respective minimum rates, if so, executing step 306; otherwise, returning to the step 303; the RNC will then re-determine the rate adjustment scheme in step 303. In this way, the system can access new services as much as possible by repeatedly adjusting the rate of existing controllable services.
For case four: the load level of the current cell is L, the existing service condition of the current cell is CSI, the type of the new service is C, the system firstly judges whether the new service can be accessed at the request rate, if so, the system accepts the access request; otherwise, determining the rate adjustment scheme of the new service and the existing controllable service, and then judging whether the new service can be accessed on the basis of the rate adjustment scheme, thereby determining whether to access the new service or reject the admission request after adjusting the rate according to the rate adjustment scheme. Figure 4 is a flow chart of admission control according to a preferred embodiment of the present invention for case four. As shown in fig. 4, the specific processing steps are as follows:
step 401: and the RNC estimates the load level of the whole cell after the new service is admitted according to the load measurement value of the current cell and the service type and the request rate in the service performance requirement of the new service.
Step 402: judging whether the cell load level estimation value obtained in the step 401 is larger than the load target value of the cell, if so, executing a step 403; otherwise, step 411 is performed.
Step 403: the system estimates the available bandwidth of the current system based on the current cell load measurements and the traffic type in the service performance requirements of the new traffic.
Step 404: judging whether the estimated system available bandwidth in step 403 is greater than the minimum rate in the new service performance requirement, if yes, going to step 405; otherwise, go to step 406.
Step 405: step 411 is executed to configure the available bandwidth estimated in step 403 as the access rate of the new service.
Wherein, the steps 401 to 405 may further be:
step 401: RNC calculates the available bandwidth of the current system according to the current load level measurement result, the service type in the new service performance requirement and other parameters; step 402: judging whether the estimated system available bandwidth in step 401 is smaller than the request rate in the new service performance requirement, if so, executing step 404; otherwise, go to step 411; step 404: judging whether the estimated system available bandwidth in step 401 is larger than the minimum rate in the new service performance requirement, if so, executing step 405; otherwise, go to step 406; step 405: the available bandwidth estimated in step 401 is configured as the access rate of the new service, and step 411 is executed. Since the available bandwidth of the system has already been estimated in step 401, step 403 is eliminated here.
In the above processing steps, in order to guarantee the rate of the existing service, the available bandwidth of the current system is estimated in step 403 or step 401, and then it is determined in step 404 whether the new service can be accessed with the available bandwidth, and if the new service cannot be accessed with the available bandwidth, step 406 is executed, so as to perform the negotiation in the next step. If the system does not need to guarantee the existing service rate first, but needs to guarantee to access the new service first, steps 403 to 405 may not be executed, that is: the step of executing 403 or the step of executing 404 in the step 402 is replaced by the step of executing 406.
Step 406: and determining the rate adjustment scheme of the existing controllable service and the new service of the cell.
In the method of the present invention, the rate adjustment scheme for determining the existing controllable services and the new services in the cell is determined by the RNC according to the service performance requirements of the existing controllable services and the new services in the cell, and may be set to individually reduce the rate of all the existing controllable services by one or more levels until the rate is reduced to the minimum rate specified by their respective service performance requirements, or may be set to individually reduce the rate of part of the existing controllable services by one or more levels until the rate is reduced to the minimum rate specified by their respective service performance requirements, or may be set to simultaneously reduce the rate of all or part of the existing controllable services and the rate of the new services by one or more levels until the rate is reduced to the minimum rate specified by their respective service performance requirements, however, the method of the present invention is not limited to the specific method.
Step 407: the load level of the cell after adjusting the rates of the existing controllable service and the new service and accessing the new service is estimated according to the rate adjustment scheme set in step 406.
Step 408: judging whether the cell load level estimation value obtained in the step 407 is greater than the load target value of the cell, if so, turning to a step 409; otherwise, go to step 410.
Step 409: and refusing the admission request and ending the admission control.
Step 410: and adjusting the rate of the existing controllable service of the cell according to the rate adjustment scheme determined in the step 406, and configuring a new service rate set in the adjustment scheme for the new service as an access rate.
Step 411: and receiving the admission request and finishing admission control.
The processing from step 406 to step 410 may further be:
step 406: determining the rate adjustment scheme of the existing controllable service of the cell; step 407: estimating the available bandwidth of the system after adjusting the existing controllable service rate according to the rate adjustment scheme determined in step 406 according to the current load measurement value of the cell and the service type in the performance requirement of the new service, and setting the access rate of the new service as the estimated available bandwidth of the system; step 408: judging whether the estimated value of the available bandwidth of the system obtained in the step 407 is smaller than the minimum rate in the new service performance requirement, if so, executing a step 409; otherwise, go to step 410; step 409 remains unchanged; step 410: and adjusting the rate of the existing controllable service of the cell according to the rate adjustment scheme set in the step 406, and configuring the available bandwidth estimated in the step 407 for the new service as the access rate.
In addition, according to the actual system design requirement, if the system requires as many access services as possible, a step 409 ' may be further included before the step 409 ', and if the rate adjustment scheme for existing controllable services and new services is determined in the step 406, the step 409 ' is: judging whether all the existing controllable services and the new service rates in the determined rate adjustment scheme are set as respective minimum rates, if so, executing a step 409; otherwise, returning to step 406; if in step 406 it is determined that there is a rate adjustment scheme for the controllable traffic, then in step 409' it is: judging whether all the existing controllable service rates in the determined rate adjustment scheme are set as respective minimum rates, if so, executing step 409; otherwise, returning to step 406; the RNC will then re-determine the rate adjustment scheme in step 406. In this way, the system can access new services as far as possible by repeatedly adjusting the rate of existing controllable services.
In the above solution, if it is determined in step 407 whether the load level estimation value is greater than the load target value, before step 409, the method may further include: judging whether the minimum rate in the service performance requirement of the new service is 0, if so, accessing the new service at the rate of 0, and ending the access control; otherwise, step 409 is performed. The new service accessed by the 0 rate can not generate load and can not influence other services of the system, so the new service which does not limit the rate can be admitted.
For case five: the load level of the current cell is H, the existing service condition of the current cell is CSN, the new service type is NC, and the system directly rejects the admission request because the load level of the current cell is higher than the load target value and the existing service and the new service of the cell are both uncontrollable.
For case six: the load level of the current cell is H, the existing service condition of the current cell is CSN, the type of the new service is C, the available bandwidth of the current system is estimated, the access rate of the new service is set as the estimated available bandwidth of the system, and the system determines whether to accept the access request according to whether the minimum rate of the new service is smaller than the available bandwidth of the system. Figure 5 is a flow chart of admission control for case six according to a preferred embodiment of the present invention. As shown in fig. 5, the specific processing steps are as follows:
step 501: the RNC judges whether the minimum rate in the service performance requirement of the new service is 0, if so, proceeds to step 502; otherwise, go to step 503.
Here, since the current cell load level is already higher than the load target value, it can be directly estimated that the system available bandwidth is 0, so the new service access rate is set to 0 in the rate adjustment scheme, and it is determined whether the system available bandwidth, i.e., 0, is smaller than the minimum rate of the new service. Since the minimum rate of the new service is not negative, the judgment is that: and judging whether the minimum rate of the new service is 0 or not.
Step 502: and configuring the rate 0 for the new service as an access rate, accessing the new service, and ending the admission control.
Step 503: and refusing the admission request and ending the admission control.
For case seven: the load level of the current cell is H, the existing service condition of the current cell is CSI, the new service type is C, the rate adjustment schemes of the new service and the existing controllable service are determined, and then whether the new service can be accessed on the basis of the rate adjustment scheme is judged, so that whether the new service is accessed or the admission request is rejected after the rate is adjusted according to the rate adjustment scheme is determined. Figure 6 is a flow chart of admission control according to the seventh embodiment of the present invention. As shown in fig. 6, the specific processing steps are as follows:
step 601: and determining the rate adjustment scheme of the existing controllable service and the new service of the cell.
Step 602: the load level of the cell after adjusting the rates of the existing controllable service and the new service according to the rate adjustment scheme determined in step 601 and accessing the new service is estimated.
Step 603: judging whether the cell load level estimation value obtained in the step 602 is larger than the load target value of the cell, if so, turning to a step 604; otherwise, go to step 605.
Step 604: and refusing the admission request and ending the admission control.
Step 605: and adjusting the rate of the existing controllable service in the cell according to the rate adjustment scheme determined in the step 601, and configuring a new service rate set in the adjustment scheme for the new service as an access rate.
Step 606: and receiving the admission request and finishing admission control.
The processing from step 601 to step 605 may further be:
step 601: determining the rate adjustment scheme of the existing controllable service of the cell; step 602: estimating the available bandwidth of the system after adjusting the existing controllable service rate according to the rate adjustment scheme determined in the step 601, and setting the access rate of the new service as the estimated available bandwidth of the system; step 603: judging whether the estimated value of the available bandwidth of the system obtained in the step 602 is smaller than the minimum rate in the new service performance requirement, if so, executing a step 604; otherwise, go to step 605; step 604 remains unchanged; step 605: and adjusting the rate of the existing controllable service of the cell according to the rate adjustment scheme determined in the step 601, and configuring the available bandwidth estimated in the step 602 for the new service as an access rate.
In addition, according to the actual system design requirement, if the system requires as many access services as possible, step 604 'may be further included before step 604, and if the rate adjustment scheme for the existing controllable service and the new service is determined in step 601, step 604' is: judging whether all the existing controllable services and the new service rates in the determined rate adjustment scheme are set as respective minimum rates, if so, executing step 604; otherwise, returning to the step 601; if in step 601 it is determined that there is a rate adjustment scheme for the controllable service, then step 604' is: judging whether all the existing controllable service rates in the determined rate adjustment scheme are set as respective minimum rates, if so, executing step 604; otherwise, returning to the step 601; the RNC will then re-determine the rate adjustment scheme in step 601. In this way, the system can access new services as far as possible by repeatedly adjusting the rate of existing controllable services.
In the above solution, if it is determined in step 603 whether the load level estimation value is greater than the load target value, step 604 may further include: judging whether the minimum rate in the service performance requirement of the new service is 0, if so, accessing the new service at the rate of 0, and ending the access control; otherwise, step 604 is performed.
For case eight: the load level of the current cell is H, the existing service condition of the current cell is CSI, the new service type is NC, the system determines the existing controllable service rate adjustment scheme, and then judges whether the new service can be accessed on the basis of the rate adjustment scheme, thereby determining whether to access the new service or reject the access request after adjusting the rate according to the rate adjustment scheme. Figure 7 is a flow chart of admission control for case eight according to a preferred embodiment of the present invention. As shown in fig. 7, the specific processing steps are as follows:
step 701: and determining the rate adjustment scheme of the existing controllable service of the cell.
Step 702: the load level of the cell after adjusting the rate of the existing controllable service and accessing the new service according to the rate adjustment scheme determined in step 701 is estimated. Here, the requested rate in the new traffic service performance requirement is used in estimating the load level.
Step 703: judging whether the cell load level estimation value obtained in the step 702 is larger than the load target value of the cell, if so, turning to a step 704; otherwise, go to step 705.
The processing in step 702 and step 703 may be further:
step 702: estimating the available bandwidth of the system after adjusting the existing controllable service rate according to the rate adjustment scheme determined in step 701; step 703: judging whether the estimated value of the available bandwidth of the system obtained in the step 702 is smaller than the request rate in the new service performance requirement, if so, executing a step 704; otherwise step 705 is performed.
Step 704: and refusing the admission request and ending the admission control.
Step 705: and adjusting the rate of the existing controllable service in the cell according to the rate adjustment scheme determined in the step 701.
Step 706: and receiving the admission request and finishing admission control.
In addition, according to the actual system design requirement, if the system requires as many access services as possible, step 704 may further include, before step 704: judging whether all the existing controllable service rates in the determined rate adjustment scheme have been set to respective minimum rates, if so, executing step 704; otherwise, returning to the step 701; the RNC will then re-determine the rate adjustment scheme in step 701. In this way, the system can access new services as far as possible by repeatedly adjusting the rate of existing controllable services.
In WCDMA system, when a mobile user initiates a new call or applies for handover in a new cell, or adds a new service in the course of an existing call, or reconfigures the channel of the existing service, the admission control described in the method of the present invention can be executed. Here, a new service access is defined as a new service access by initiating a new call in a new cell and adding a new service in an existing call process; the method comprises the following steps of defining switching applied in a new cell as switching, and dividing the switching into two types of same-frequency switching and different-frequency switching; defining the channel reconfiguration of the existing service as channel reconfiguration; the admission request for the new traffic can be divided into: new service access, same frequency switching, different frequency switching and channel reconfiguration. In addition, when carrying out admission control, the uplink and the downlink carry out admission control respectively, and only when the uplink and the downlink judge that the admission request can be accepted, the system accepts the admission request so as to access the new service. The above embodiments can be applied to the admission control of the uplink or downlink of three admission requests, namely new service access, pilot frequency switching and channel reconfiguration.
When the method of the invention is applied to the downlink access control of the same-frequency switching, the adopted scheme is basically the same as the scheme, because the users of the same-frequency switching can not directly reduce the original service rate and need to complete the rate adjustment through the rate reconfiguration, the access rate configured for the new service needs to be replaced by: and proposing a proposal of rate reconfiguration for the new service, refusing the access request of the new service, and resubmitting the access request at the reconfigured rate after the new service reconfigures the rate according to the proposal.
That is to say: the processing for the fifth case is not changed, and the processing for the first case, the third case and the eighth case is not changed, and the processing is not changed in fig. 1, 3 and 7; the processing described for fig. 2, 4, 5 and 6 for case two, case four, case six and case seven above becomes:
in fig. 2, step 206 is: proposing a suggestion of reconfiguring the access rate of the new service to the system available bandwidth estimated in the step 203, reconfiguring the access rate of the new service to the system available bandwidth according to the suggestion, and restarting an admission request to execute the step 201;
in fig. 4, step 405 is: proposing a suggestion of reconfiguring the access rate of the new service to the system available bandwidth estimated in the step 403, reconfiguring the access rate of the new service to the system available bandwidth according to the suggestion, and restarting an admission request to execute the step 401; step 410 is: adjusting the rate of the existing controllable service in the cell according to the rate adjustment scheme determined in step 406, proposing a suggestion that the new service access rate is reconfigured to the new service rate set in the rate adjustment scheme in step 406 or the system available bandwidth estimated in step 407, the new service reconfigures the access rate to the new service rate set in the rate adjustment scheme or the system available bandwidth according to the suggestion, and restarts an admission request, and step 401 is executed; before step 409, the processing after determining that the minimum rate of the new service is 0 is as follows: proposing a suggestion of reconfiguring the access rate of the new service to 0 rate, reconfiguring the access rate of the new service to 0 rate according to the suggestion, and re-sending an admission request, and executing the step 401;
in FIG. 5, step 502 is: proposing a suggestion of reconfiguring the access rate of the new service to 0 rate, reconfiguring the access rate of the new service to 0 rate according to the suggestion, and re-sending an admission request, and executing step 501;
in FIG. 6, step 605 is: adjusting the rate of the existing controllable service in the cell according to the rate adjustment scheme determined in the step 601, proposing a proposal for reconfiguring the access rate of the new service into the new service rate set in the rate adjustment scheme in the step 601 or the system available bandwidth estimated in the step 602, reconfiguring the access rate into the new service rate set in the rate adjustment scheme or the system available bandwidth by the new service according to the proposal, and restarting an admission request to execute the step 601; before step 604, the processing after determining that the minimum rate of the new service is 0 is: a proposal is made to reconfigure the access rate of the new service to 0 rate, the new service reconfigures the access rate to 0 rate according to the proposal and re-issues an admission request, and step 601 is executed.
When the method of the invention is applied to the uplink admission control of the same-frequency switching, the new service is directly admitted because the uplink load at the moment comprises the load generated by the new service currently applied for admission.
In summary, the embodiment of the method of the present invention can make the RNC perform service negotiation on the existing controllable service and the admission application service of the system when performing admission control, thereby maximizing the system capacity and making full use of the wireless resources of the system.
Claims (16)
1. An admission control method using negotiation mechanism includes the following steps:
a. after receiving an admission request of a new service, a base station controller RNC obtains a new service type according to the service performance requirement of the new service in the admission request, simultaneously obtains a load measurement value of a current access cell and analyzes the composition of the current existing service to obtain the load level of the current cell and the existing service condition of the current cell;
b. judging whether the current cell load level is lower than a cell load target value, if so, executing the step c; if the current cell load level is higher than the cell load target value and the controllable service exists in the existing services or the new service is the controllable service, executing the step d; if the current cell load level is higher than the cell load target value and both the existing service and the new service are uncontrollable services, rejecting the admission request and ending the admission control;
c. judging whether the current cell can be accessed to the new service, if so, receiving the access request and ending the access control; if the new service can not be accessed, and the existing service has controllable service or the new service is controllable service, executing step d; if the new service can not be accessed and the existing service and the new service are uncontrollable services, rejecting the admission request and ending the admission control;
d. determining a rate adjustment scheme of controllable service, controllable new service or a combination of the controllable new service and the controllable new service in the existing service according to the current existing service condition and the new service type, judging whether the current cell can access the new service after the rate is adjusted according to the scheme, if so, adjusting the rate according to the rate adjustment scheme, receiving the admission request, and ending the admission control; otherwise, refusing the admission request and ending the admission control.
2. The method of claim 1, wherein in step c, the method for determining whether the current cell can access the new service comprises:
estimating the load level of the cell after the new service is accessed, judging whether the estimated load level of the cell is higher than a cell load target value, if so, the current cell can not access the new service; otherwise, the current cell can access the new service.
3. The method of claim 1, wherein in step c, the method for determining whether the current cell can access the new service comprises:
estimating the current available bandwidth of the system, judging whether the estimated available bandwidth of the system is smaller than the request rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service.
4. The method of claim 1, wherein when there is no controllable service in the existing services and the new service is a controllable service, in step d,
the rate adjustment determining scheme specifically comprises: estimating the current available bandwidth of the system, and setting the access rate of the new service as the estimated available bandwidth of the system;
the method for judging whether the cell can access the new service comprises the following steps: judging whether the estimated available bandwidth of the system is smaller than the minimum rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and configuring the estimated available bandwidth of the system for the new service as the access rate.
5. The method of claim 3, wherein when there is no controllable service in the current existing services and the new service is a controllable service, in step d,
the rate adjustment determining scheme specifically comprises: setting the access rate of the new service as the system available bandwidth estimated in the step c;
the method for judging whether the cell can access the new service comprises the following steps: c, judging whether the estimated system available bandwidth is less than the minimum rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and configuring the estimated available bandwidth of the system for the new service as the access rate.
6. The method of claim 1, wherein when there is a controllable service in the existing services and the new service is an uncontrollable service, in step d,
the rate adjustment determining scheme specifically comprises: setting the rate of the existing controllable service;
the method for judging whether the cell can access the new service comprises the following steps: estimating the available bandwidth of the system after the rate of the existing controllable service is adjusted according to the rate adjustment scheme, judging whether the estimated available bandwidth of the system is smaller than the request rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service; or,
estimating the cell load level of the new service accessed after the existing controllable service rate is adjusted according to the rate adjustment scheme, and then judging whether the estimated load level is higher than a load target value, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and adjusting the rate of the existing controllable service according to the rate adjustment scheme.
7. The method of claim 1, wherein when there is a controllable service in the existing services and the new service is a controllable service, in step d,
the rate adjustment determining scheme specifically comprises: setting the speed of the existing controllable service, estimating the available bandwidth of the system after the speed of the existing controllable service is adjusted according to the speed adjusting scheme, and setting the access speed of the new service as the estimated available bandwidth of the system;
the method for judging whether the cell can access the new service comprises the following steps: judging whether the estimated available bandwidth of the system is smaller than the minimum rate of the new service, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and adjusting the rate of the existing controllable service according to the rate adjustment scheme, and configuring the estimated available bandwidth of the system for the new service as the access rate.
8. The method of claim 1, wherein when there is a controllable service in the existing services and the new service is a controllable service, in step d,
the rate adjustment determining scheme specifically comprises: setting the speed of the existing controllable service and the new service;
the method for judging whether the cell can access the new service comprises the following steps: estimating the cell load level of the new service after adjusting the existing controllable service and the new service rate according to the rate adjustment scheme, judging whether the estimated load level is higher than a load target value, if so, the current cell can not access the new service; otherwise, the current cell can access the new service;
the rate adjustment according to the rate adjustment scheme specifically comprises the following steps: and adjusting the speed of the existing controllable service according to the speed adjusting scheme, and configuring the new service speed set in the speed adjusting scheme for the new service as the access speed.
9. The method according to claim 2, wherein when there is a controllable service in the existing services and the new service is a controllable service, step c further comprises, before the step d is executed: estimating the current available bandwidth of the system, judging whether the estimated available bandwidth of the system in the step c is smaller than the minimum rate of the new service, if so, executing the step d; otherwise, the estimated system available bandwidth is configured for the new service as the access rate, the admission request is received, and the admission control is finished.
10. The method according to claim 3, wherein when there is a controllable service in the existing services and the new service is a controllable service, in step c, before the step d, the method further comprises: judging whether the estimated system available bandwidth in the step c is smaller than the minimum rate of the new service, if so, executing the step d; otherwise, the estimated system available bandwidth is configured for the new service as the access rate, the admission request is received, and the admission control is finished.
11. The method according to claim 6 or 7, wherein when there is a controllable service in the existing services, the step d of rejecting the admission request further comprises: judging whether all the existing controllable service rates are set to respective minimum rates in the rate adjustment scheme, and if so, rejecting the admission request; otherwise, re-executing step d.
12. The method of claim 8, wherein when there is controllable service in the existing services and the new service is controllable service, the step d of rejecting the admission request further comprises: judging whether all the existing controllable services and the new service rates are set to respective minimum rates in the rate adjustment scheme, and if so, rejecting the admission request; otherwise, re-executing step d.
13. The method according to claim 8 or 12, wherein when there is controllable traffic in the existing traffic and the new traffic is controllable traffic, the step of rejecting the admission request further comprises: judging whether the minimum rate of the new service is 0, if so, configuring 0 rate for the new service as an access rate, and receiving an access request; otherwise, the admission request is refused.
14. The method according to claim 4, 5, 9 or 10, wherein when the current admission request is an admission request of intra-frequency handover, in step d, after the new service is judged to be accessible, the processing step is: and b, proposing a proposal for rate reconfiguration to the estimated available bandwidth of the system for the new service, reconfiguring the self access rate of the new service to the available bandwidth of the system according to the proposed proposal, and re-sending an admission request to return to the step a.
15. The method according to claim 7 or 8, wherein when the current admission request is an admission request of intra-frequency handover, in step d, after the new service is judged to be accessible, the processing step is: and b, adjusting the speed of the existing controllable service according to the speed adjusting scheme, proposing a proposal for reconfiguring the access speed into a new service speed set in the speed adjusting scheme for the new service, reconfiguring the self access speed into the new service speed set in the speed adjusting scheme according to the proposed proposal for the new service, and re-sending an admission request and returning to the step a.
16. The method of claim 13, wherein after determining that the minimum rate of the new service is 0, the processing step is: and b, proposing a proposal of reconfiguring the access rate to 0 rate for the new service, reconfiguring the self access rate to 0 rate by the new service according to the proposed proposal, and re-sending an admission request to return to the step a.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428859C (en) * | 2006-02-10 | 2008-10-22 | 华为技术有限公司 | Call ready to cut-in control method and device |
| WO2010057446A1 (en) * | 2008-11-20 | 2010-05-27 | 华为技术有限公司 | Method and network device for determining resource mapping in coordinated multi-point transmission, and sysytem thereof |
| CN101990262A (en) * | 2009-08-05 | 2011-03-23 | 北京大学 | Access control method, device and cell base station of wireless communication network |
| CN102137428A (en) * | 2010-08-13 | 2011-07-27 | 华为技术有限公司 | Method, equipment and system for controlling service access rate |
| CN101119140B (en) * | 2006-08-03 | 2012-04-25 | 鼎桥通信技术有限公司 | Load stabilization method and apparatus for layered cell structure |
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2004
- 2004-06-17 CN CNB2004100483253A patent/CN100525282C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428859C (en) * | 2006-02-10 | 2008-10-22 | 华为技术有限公司 | Call ready to cut-in control method and device |
| CN101119140B (en) * | 2006-08-03 | 2012-04-25 | 鼎桥通信技术有限公司 | Load stabilization method and apparatus for layered cell structure |
| WO2010057446A1 (en) * | 2008-11-20 | 2010-05-27 | 华为技术有限公司 | Method and network device for determining resource mapping in coordinated multi-point transmission, and sysytem thereof |
| US8842616B2 (en) | 2008-11-20 | 2014-09-23 | Huawei Technologies Co., Ltd. | Method, network device and system for determining resource mapping in coordinated multi-point transmission |
| CN101990262A (en) * | 2009-08-05 | 2011-03-23 | 北京大学 | Access control method, device and cell base station of wireless communication network |
| CN102137428A (en) * | 2010-08-13 | 2011-07-27 | 华为技术有限公司 | Method, equipment and system for controlling service access rate |
| CN102137428B (en) * | 2010-08-13 | 2013-10-09 | 华为技术有限公司 | Method, equipment and system for controlling service access rate |
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| CN100525282C (en) | 2009-08-05 |
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