CN103379551A - Method and equipment for allocating high-level data link control link bandwidths - Google Patents
Method and equipment for allocating high-level data link control link bandwidths Download PDFInfo
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- CN103379551A CN103379551A CN2012101188343A CN201210118834A CN103379551A CN 103379551 A CN103379551 A CN 103379551A CN 2012101188343 A CN2012101188343 A CN 2012101188343A CN 201210118834 A CN201210118834 A CN 201210118834A CN 103379551 A CN103379551 A CN 103379551A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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Abstract
The invention provides a method for allocating high-level data link control link bandwidths and equipment for allocating high-level data link control link bandwidths and relates to the technical field of mobile communication. The method includes the steps that RE performs statistics on communication flows, from the RE to a REC, of uplink HDLC sublinks; the RE judges whether the link bandwidths of the uplink HDLC sublinks need to be adjusted or not according to the communication flows obtained through the statistics and the current link bandwidths of the uplink HDLC sublinks; the RE sends a bandwidth adjusting request message to the REC when judging that the link bandwidths of the uplink HDLC sublinks need to be adjusted; the RE adjusts the link bandwidths of the uplink HDLC sublinks according to a bandwidth adjusting response message which is returned by the REC and carries bandwidth adjusting amount. The REC can adjust the bandwidths of the uplink HDLC sublinks according to the request of the RE, and thus dynamic adjustment and allocation of the uplink HDLC sublink bandwidths are achieved.
Description
Technical field
The present invention relates to the mobile communication technology field, be particularly related to use between the radio frequency unit of mobile communication base station and the Base Band Unit and be encapsulated in CPRI (Common Public Radio Interface, common public radio interface) (the High-Level Data Link Control of the HDLC in, when High-Level Data Link Control) link carries out data interaction, the method and apparatus that the bandwidth of HDLC link is distributed.
Background technology
In the base station system of mobile communication, single base station generally is divided into baseband portion and radio frequency part.When making up single base station, radio frequency part can be combined the formation centralized base station with baseband portion, also can distinguish independent the placement and form distributed base station system.
Along with the development of mobile communication technology, especially in 3-G (Generation Three mobile communication system), the base station that tradition concentrates in together baseband portion and radio frequency part is difficult to adapt to the needs of quick networking.Therefore the base station of a new generation much all is to adopt distributed base station system, namely forms the networking new architecture that BBU (Base Band Unit, Base Band Unit) adds RU (Radio Unit, radio frequency unit).Adopt optical fiber (or cable etc.) to connect between BBU and the RU, the communications protocol of employing then mainly is the CPRI protocol specification.
The CPRI protocol specification is the standard of jointly being published by many companies cooperation in the communications industry, it is to inside, wireless base station REC (Radio Equipment Controller, the wireless device controls center) and the key interface between the RE (Radio Equipment, wireless device) carried out standard.In mobile communication base station system, the corresponding BBU of REC, RE based on the CPRI protocol specification, can improve the versatility of interface between BBU and the RU corresponding to RU, and CPRI protocol data frame structural representation is seen accompanying drawing 1.As we can see from the figure, the HDLC protocol data frame is encapsulated in the CPRI protocol data frame and transmits, and CPRI agreement regulation, the bandwidth of HDLC link is according to the line bandwidth of CPRI own, can be configured to several limited fixed values, 240kbps for example, 480kbps and 960kbps etc. can not arrange arbitrarily.
CPRI basic network configuration structure is comprised of REC and the single RE that links to each other with REC by CPRI, sees accompanying drawing 2.But generally for the durability of CPRI interface is provided, all can expand this network configuration, communication link protection is exactly a kind of very typical expanded configuration, and namely a REC chain connects plural RE, sees accompanying drawing 3.
The equipment at CPRI link two ends is REC and RE, can be operated under FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) and TDD (Time Division Duplex, the time division duplex) pattern.If REC and RE are operated in the tdd mode under the communication link protection environment, REC (below be referred to as down direction) to the communication direction of each RE, because be that a REC sends, a plurality of RE receives, each RE receives only the HDLC data that mail to oneself, so a plurality of RE dynamically shares bandwidth; But to the REC communication direction, (be designated hereinafter simply as up direction) at each RE, that a plurality of RE send, a REC receives, therefore each HDLC sublink bandwidth between each RE and the REC all is to set in advance (the TDD time slot that is the HDLC that takies of each RE is fixed), for example the REC chain has connected 4 RE, the whole link bandwidth of HDLC is 960kbps among the CPRI, if use the method for mean allocation bandwidth, the HDLC sublink bandwidth between each RE and the REC is 240kpbs so.
Summary of the invention
In view of this, the purpose of the embodiment of the invention provides a kind of distribution method and equipment of HDLC link bandwidth, realizes that RE is to the Dynamic Bandwidth Allocation of the up HDLC sublink of REC.
For solving the problems of the technologies described above, the embodiment of the invention provides scheme as follows:
The distribution method of a kind of High-Level Data Link Control (HDLC) link bandwidth is applied to the public radio interface CPRI link that formed by communication link protection by a wireless device controls center REC and plural wireless device RE, and described method comprises:
Described RE adds up this RE to the communication flows of the up HDLC sublink of REC;
The communication flows that described RE obtains according to statistics and the current link bandwidth of described up HDLC sublink judge whether to need to adjust the link bandwidth of described up HDLC sublink;
Described RE sends bandwidth adjustment request message to described REC when judging the link bandwidth that needs the described up HDLC sublink of adjustment;
That described RE returns according to described REC, as to carry bandwidth adjustment amount bandwidth is adjusted response message, jointly adjusts the link bandwidth of described up HDLC sublink with described REC.
Preferably, in the said method,
The described link bandwidth that judges whether to need to adjust described up HDLC sublink comprises:
Calculate the ratio of described communication flows and described current link bandwidth;
Surpass duration that the first thresholding and described ratio surpass described the first thresholding when reaching the second thresholding in described ratio, judge the link bandwidth that needs to increase described up HDLC sublink;
Be lower than duration that the 3rd thresholding and described ratio be lower than described the 3rd thresholding when reaching the 4th thresholding in described ratio, judgement need to reduce the link bandwidth of described up HDLC sublink.
Preferably, in the said method,
When judging the link bandwidth that needs the described up HDLC sublink of adjustment, described RE further determines the expectation adjustment amount of link bandwidth, and carries described expectation adjustment amount in described bandwidth adjustment request message.
Preferably, in the said method, before the communication flows of the up HDLC sublink of REC, described method also comprises at described this RE of statistics:
Described RE receives the original bandwidth allocation message that described REC sends, and described original bandwidth allocation message is used to indicate the initial bandwidth of distributing to described up HDLC sublink;
Described RE set up with described REC between up HDLC sublink, and according to described initial bandwidth to described REC transmission data.
The embodiment of the invention also provides the wireless device RE in a kind of public radio interface CPRI link, and described CPRI chain route wireless device controls center REC and plural described RE form by communication link protection, and described RE comprises:
The bandwidth statistical module is used for this RE of statistics to the communication flows of the up HDLC sublink of REC;
The application module, for the communication flows that obtains according to described bandwidth statistical module counts and the current link bandwidth of described up HDLC sublink, judge whether to need to adjust the link bandwidth of described up HDLC sublink, and when needs are adjusted the link bandwidth of described up HDLC sublink, send bandwidth adjustment request message to described REC;
The CPRI protocol module is used for bandwidth that return according to described REC, that carry the bandwidth adjustment amount and adjusts response message, jointly adjusts the link bandwidth of described up HDLC sublink with described REC.
Preferably, among the above-mentioned RE, described application module comprises:
Calculating sub module is for the ratio of calculating described communication flows and described current link bandwidth;
First judges submodule, is used for surpassing duration that the first thresholding and described ratio surpass described the first thresholding when reaching the second thresholding in described ratio, judges the link bandwidth that needs to increase described up HDLC sublink;
Second judges submodule, is used for being lower than duration that the 3rd thresholding and described ratio be lower than described the 3rd thresholding when reaching the 4th thresholding in described ratio, and judgement need to reduce the link bandwidth of described up HDLC sublink.
Preferably, among the above-mentioned RE, described application module also is used for further determining the expectation adjustment amount of link bandwidth, and carry described expectation adjustment amount in described bandwidth adjustment request message when judging the link bandwidth that needs the described up HDLC sublink of adjustment.
Preferably, among the above-mentioned RE, described CPRI protocol module also is used for the up HDLC sublink between foundation and the described REC, receives the original bandwidth allocation message that described REC sends, and sends data according to described initial bandwidth to described REC.
The embodiment of the invention also provides a kind of distribution method of High-Level Data Link Control HDLC link bandwidth, be applied to the public radio interface CPRI link that formed by communication link protection by a wireless device controls center REC and plural wireless device RE, described method comprises:
Described REC receives the bandwidth adjustment request message that described RE sends, described bandwidth adjustment request message is that described RE is at the communication flows of the up HDLC sublink that arrives REC according to this RE and the current link bandwidth of described up HDLC sublink, judge when needing to adjust the bandwidth of described up HDLC sublink, send to described REC;
Described REC determines the bandwidth adjustment amount of described up HDLC sublink according to described bandwidth adjustment request, and adjusts response message to the bandwidth that described RE feedback carries the bandwidth adjustment amount;
Described REC adjusts the link bandwidth of described up HDLC sublink according to described bandwidth adjustment amount.
Preferably, in the said method, the described bandwidth adjustment amount of determining described up HDLC sublink comprises:
Described REC adjusts strategy according to pre-set bandwidths, judges whether to agree to carry out the bandwidth adjustment based on described bandwidth adjustment request message:
When agreeing that carrying out bandwidth adjusts, determine the bandwidth adjustment amount of described up HDLC sublink;
When refusal carries out the bandwidth adjustment, adjust refuse information to bandwidth of described RE feedback.
Preferably, in the said method, before the bandwidth adjustment request message that the described RE of described reception sends, described method also comprises:
Described REC is defined as the initial bandwidth of the described up HDLC sublink of described RE distribution;
Described REC sends original bandwidth allocation message to described RE, and described original bandwidth allocation message is used to indicate the initial bandwidth of distributing to described up HDLC sublink;
Described REC is according to described initial bandwidth, and the up HDLC sublink between foundation and the described RE is also distributed described initial bandwidth for described RE.
The embodiment of the invention also provides the REC of the wireless device controls center in a kind of public radio interface CPRI link, and the described described REC of CPRI chain route and plural wireless device RE form by communication link protection, and described REC comprises:
The request receiving module, be used for receiving the bandwidth adjustment request message that described RE sends, described bandwidth adjustment request message is that described RE is at the communication flows of the up HDLC sublink that arrives REC according to this RE and the current link bandwidth of described up HDLC sublink, judge when needing to adjust the bandwidth of described up HDLC sublink, send to described REC;
Bandwidth allocation module is used for according to described bandwidth adjustment request, determines the bandwidth adjustment amount of described up HDLC sublink, and adjusts response message to the bandwidth that described RE feedback carries the bandwidth adjustment amount;
The CPRI protocol module is used for according to described bandwidth adjustment amount, adjusts the link bandwidth of described up HDLC sublink.
Preferably, among the above-mentioned REC, described bandwidth allocation module comprises:
Judge submodule, be used for adjusting strategy according to pre-set bandwidths, judge whether to agree to carry out the bandwidth adjustment based on described bandwidth adjustment request message:
Determine submodule, be used for when agreeing that carrying out bandwidth adjusts, determining the bandwidth adjustment amount of described up HDLC sublink;
The refusal submodule is used for when refusal carries out the bandwidth adjustment, adjusts refuse information to bandwidth of described RE feedback.
Preferably, among the above-mentioned REC,
Described bandwidth allocation module, also be used for being defined as the initial bandwidth of the described up HDLC sublink that described RE distributes, and to described RE transmission original bandwidth allocation message, described original bandwidth allocation message is used to indicate the initial bandwidth of distributing to described up HDLC sublink;
Described CPRI protocol module also is used for according to described initial bandwidth, and the up HDLC sublink between foundation and the described RE is also distributed described initial bandwidth for described RE.
The embodiment of the invention also provides a kind of base station system, comprises an aforesaid REC, also comprises aforesaid RE more than two, and wherein, described REC and plural described RE form the CPRI link by communication link protection.
Can find out from the above, distribution method and the equipment of the HDLC link bandwidth that the embodiment of the invention provides, REC can carry out according to the request of RE the bandwidth adjustment of up HDLC sublink, thereby dynamic adjustment and the distribution of up HDLC sublink bandwidth have been realized, and, the embodiment of the invention can realize that the whole link bandwidth of up HDLC distributes according to need between the HDLC sublink between each RE and the REC, improve the utilance of the whole link bandwidth of HDLC, reduces bandwidth waste.
Description of drawings
Fig. 1 is the schematic diagram of CPRI protocol data frame structure;
Fig. 2 is REC and the CPRI basic network configuration structural representation that RE forms;
Fig. 3 is the CPRI extended network configuration structure schematic diagram that REC and a plurality of RE form;
Fig. 4 is the schematic flow sheet of the described bandwidth allocation methods of the embodiment of the invention when RE implements;
Fig. 5 is the schematic flow sheet of the described bandwidth allocation methods of the embodiment of the invention when REC implements;
The structural representation of a kind of RE that Fig. 6 provides for the embodiment of the invention;
The structural representation of a kind of REC that Fig. 7 provides for the embodiment of the invention;
A plurality of RE that Fig. 8 provides for another embodiment of the present invention dynamically share the flow chart of the whole link bandwidth method of up HDLC.
Embodiment
Generally, each RE is not synchronous and average to the up direction amount of communication data of REC, but the burst with unfixed, so in the limited situation of HDLC overall bandwidth, prior art is the method for up HDLC link assignment fixed-bandwidth between each RE and the REC in advance, lack flexibility, can not realize the dynamic assignment of bandwidth and share, may cause the problems such as bandwidth availability ratio is lower, bandwidth waste.
For this reason, the embodiment of the invention provides a kind of distribution method of dynamic bandwidth, realizes RE to the Dynamic Bandwidth Allocation of the up HDLC sublink of REC, thereby can realize the distribution according to need of bandwidth, improves bandwidth availability ratio.For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
The distribution method of the described HDLC link bandwidth of the embodiment of the invention is applied in the CPRI link that is formed by communication link protection by a REC and plural RE as shown in Figure 3.
Please refer to Fig. 4, show the step of the described method of present embodiment when RE implements, comprising:
Here, described bandwidth adjustment amount specifically can be the information of the amount of bandwidth of increase or minimizing.Described bandwidth is adjusted the resource information that response message can also comprise the amount of bandwidth that increases or reduce, and such as the time slot that increases or reduce and positional information thereof etc. is so that the bandwidth resources of described RE after determining accordingly to adjust.
By above step, RE can as required, adjust to the REC bandwidth on demand; And then according to the link bandwidth of the up HDLC sublink of the feedback adjusting of REC, thereby can realize the dynamic adjustment of bandwidth.
In the present embodiment, RE adjusts the link bandwidth of described up HDLC sublink jointly with REC, refers to adjust at synchronization at RE and REC the link bandwidth of described up HDLC sublink.It can be that described REC has determined to send to described RE behind the bandwidth adjustment amount of described RE and the bandwidth time adjustment that described bandwidth is adjusted response message.Therefore, described bandwidth is adjusted in the response message can also include bandwidth time adjustment information, and described bandwidth time adjustment information is used to indicate described REC and described RE carries out the moment that bandwidth is adjusted.Like this, in above-mentioned steps 44, when described RE can arrive in the moment that bandwidth is adjusted, adjust the link bandwidth of described up HDLC sublink, and then send data according to the bandwidth resources after adjusting to REC.For example, described RE uses the bandwidth resources after adjusting to send data from certain frame; Described REC also will from this frame, according to the bandwidth resources after the described RE adjustment, receive the data of described RE.
In the present embodiment, RE can in advance according to the bandwidth of REC original allocation, carry out data interaction with REC.That is, RE receives the original bandwidth allocation message that described REC sends, and described original bandwidth allocation message is used to indicate the initial bandwidth of distributing to described up HDLC sublink; Then, RE set up with described REC between up HDLC sublink, and according to described initial bandwidth to described REC transmission data.
In the subsequent communications process, the communication flows that RE can the up HDLC sublink of real-time statistics, and adjust trigger policy according to the bandwidth that sets in advance, judge the current link bandwidth that whether needs to adjust.Concrete, can calculate the ratio of described communication flows and described current link bandwidth, then judge the relation between described ratio and the thresholding, for example, surpass duration that the first thresholding and described ratio surpass described the first thresholding when reaching the second thresholding in described ratio, judge the link bandwidth that needs to increase described up HDLC sublink; Be lower than duration that the 3rd thresholding and described ratio be lower than described the 3rd thresholding when reaching the 4th thresholding in described ratio, judgement need to reduce the link bandwidth of described up HDLC sublink.Thus, present embodiment can realize that the whole link bandwidth of up HDLC distributes according to need between the HDLC sublink between each RE and the REC, and when communication flows was large, request REC increased bandwidth; Otherwise, then ask REC to reduce bandwidth, to improve the utilance of the whole link bandwidth of HDLC.
RE is when judging the link bandwidth that needs the described up HDLC sublink of adjustment in the present embodiment, can also further determine the expectation adjustment amount of link bandwidth, and in described bandwidth adjustment request message, carry described expectation adjustment amount, so that described REC adjusts link bandwidth according to described expectation adjustment amount.The expectation adjustment amount can be that a default bandwidth is adjusted step-length, or calculate according to the difference between current bandwidth and the desired bandwidth.Described desired bandwidth then can be according to current communication flows setting, so that described ratio is in a pre-set interval.
Please refer to Fig. 5, show the step of the described method of present embodiment when REC implements, comprising:
By above step, REC can adjust the bandwidth of RE according to the request of RE, thereby can realize the dynamic adjustment of bandwidth.
In the above-mentioned steps 52, described REC can also further determine the bandwidth time adjustment information of described up HDLC sublink, and adjusts response message in described bandwidth and carry described bandwidth time adjustment information.Described bandwidth time adjustment information is used to indicate described REC and described RE and carries out the moment that bandwidth is adjusted, so that can adjust at synchronization the link bandwidth of described up HDLC sublink at RE described in the step 53 and REC.
In the present embodiment, REC can be in advance for REC distributes initial bandwidth, and the up HDLC sublink between foundation and the RE specifically comprises to carry out data interaction: REC is defined as the initial bandwidth of the described up HDLC sublink of described RE distribution; Then, send original bandwidth allocation message to described RE, described original bandwidth allocation message is used to indicate the initial bandwidth of distributing to described up HDLC sublink; Then, REC is according to described initial bandwidth, and the up HDLC sublink between foundation and the described RE is also distributed described initial bandwidth for described RE.
In above-mentioned steps 52, REC can adjust strategy according to pre-set bandwidths, judges whether to agree to carry out the bandwidth adjustment based on described bandwidth adjustment request message: when agreeing that carrying out bandwidth adjusts, determine the bandwidth adjustment amount of described up HDLC sublink; When refusal carries out the bandwidth adjustment, feed back a bandwidth to described RE and adjust refuse information.
Here, bandwidth adjustment strategy can comprise:
When described RE request increases bandwidth, if when up HDLC link has not had available bandwidth resources, refuse the bandwidth adjustment request of described RE; When up HDLC link also has available bandwidth resources, part or all of resource in the available bandwidth resources is distributed to described RE, to increase the bandwidth of described RE, the adjustment amount of bandwidth can be determined according to the expectation adjustment amount of described RE request, perhaps adjust step-length according to pre-set bandwidths and determine;
When described RE request reduces bandwidth, can adjust the bandwidth that step-length reduces described RE according to pre-set bandwidths, or directly according to the bandwidth expectation adjustment amount of RE request, reduce the bandwidth of described RE.
According to the method for above-mentioned allocated bandwidth, present embodiment can realize that the whole link bandwidth of up HDLC distributes according to need between the HDLC sublink between each RE and the REC, improve the utilance of the whole link bandwidth of HDLC, reduces bandwidth waste.
Need to prove that the up HDLC sublink bandwidth between the above RE and the REC can be that continuous several times increases, until be increased to the bandwidth upper limit, but also continuous several times reduces, until reduce to initial bandwidth.The increase of link bandwidth and minimizing, be dependent on the operating position of real time communication flow and the whole link bandwidth of current HDLC of up HDLC sublink between RE and the REC fully, so present embodiment has been realized the up HDLC flexible allocation of whole link bandwidth between each RE and REC and has dynamically been shared, and has improved the utilance of the whole link bandwidth of HDLC among the CPRI.
Based on above-mentioned bandwidth allocation methods, the embodiment of the invention also provides RE equipment and the REC equipment in a kind of CPRI link, and described CPRI chain route wireless device controls center REC and plural described RE form by communication link protection.Wherein, described RE comprises as shown in Figure 6:
The bandwidth statistical module is used for this RE of statistics to the communication flows of the up HDLC sublink of REC;
The application module, for the communication flows that obtains according to described bandwidth statistical module counts and the current link bandwidth of described up HDLC sublink, judge whether to need to adjust the link bandwidth of described up HDLC sublink, and when needs are adjusted the link bandwidth of described up HDLC sublink, send bandwidth adjustment request message to described REC;
The CPRI protocol module is used for bandwidth that return according to described REC, that carry the bandwidth adjustment amount and adjusts response message, jointly adjusts the link bandwidth of described up HDLC sublink with described REC.
For realizing the distribution according to need of bandwidth, preferably, the described application module of present embodiment comprises:
Calculating sub module is for the ratio of calculating described communication flows and described current link bandwidth;
First judges submodule, is used for surpassing duration that the first thresholding and described ratio surpass described the first thresholding when reaching the second thresholding in described ratio, judges the link bandwidth that needs to increase described up HDLC sublink;
Second judges submodule, is used for being lower than duration that the 3rd thresholding and described ratio be lower than described the 3rd thresholding when reaching the 4th thresholding in described ratio, and judgement need to reduce the link bandwidth of described up HDLC sublink.
Here, RE can further indicate its desired bandwidth adjustment amount to REC, so that REC carries out the bandwidth adjustment accordingly.At this moment, described application module, also be used for when judging the link bandwidth that needs the described up HDLC sublink of adjustment, further determine the expectation adjustment amount of link bandwidth, and in described bandwidth adjustment request message, carry described expectation adjustment amount, so that described REC adjusts link bandwidth according to described expectation adjustment amount.
When initially setting up link, described RE can communicate based on the initial bandwidth that REC distributes.At this moment, described CPRI protocol module also is used for the up HDLC sublink between foundation and the described REC, receives the original bandwidth allocation message that described REC sends, and sends data according to described initial bandwidth to described REC.
Described REC comprises as shown in Figure 7:
The request receiving module, be used for receiving the bandwidth adjustment request message that described RE sends, described bandwidth adjustment request message is that described RE is at the communication flows of the up HDLC sublink that arrives REC according to this RE and the current link bandwidth of described up HDLC sublink, judge when needing to adjust the bandwidth of described up HDLC sublink, send to described REC;
Bandwidth allocation module is used for according to described bandwidth adjustment request, determines the bandwidth adjustment amount of described up HDLC sublink, and adjusts response message to the bandwidth that described RE feedback carries the bandwidth adjustment amount;
The CPRI protocol module is used for according to described bandwidth adjustment amount, adjusts the link bandwidth of described up HDLC sublink.
Wherein, described bandwidth allocation module can comprise:
Judge submodule, be used for adjusting strategy according to pre-set bandwidths, judge whether to agree to carry out the bandwidth adjustment based on described bandwidth adjustment request message:
Determine submodule, be used for when agreeing that carrying out bandwidth adjusts, determining the bandwidth adjustment amount of described up HDLC sublink;
The refusal submodule is used for feeding back a bandwidth to described RE and adjusting refuse information when refusal carries out the bandwidth adjustment.
Wherein, described bandwidth allocation module, also be used for being defined as the initial bandwidth of the described up HDLC sublink that described RE distributes, and send original bandwidth allocation message to described RE, described original bandwidth allocation message is used to indicate the initial bandwidth of distributing to described up HDLC sublink;
Described CPRI protocol module also is used for according to described initial bandwidth, and the up HDLC sublink between foundation and the described RE is also distributed described initial bandwidth for described RE.
Present embodiment also provides a kind of base station system, and this base station system comprises aforesaid REC, also comprises plural aforesaid RE, and wherein, described REC and plural described RE form the CPRI link by communication link protection.
At last, in order to understand better the present invention, below in conjunction with accompanying drawing 3 and accompanying drawing 8, by one more specifically embodiment technical scheme of the present invention is further described.
As shown in Figure 3, the REC chain has connected 3 RE and has been respectively 1#RE, 2#RE and 3#RE.The whole link bandwidth of up HDLC of supposing 3 RE is 480kbps, and it is whole link bandwidth how dynamically to share this 480kpbs that the below describes each RE in detail, please refer to Fig. 8, may further comprise the steps:
1. initialization flow process:
A) the HDLC link bandwidth assignment module creation of REC and safeguard a up HDLC link bandwidth resource pond, the available bandwidth resources size is 480kpbs;
B) the HDLC link bandwidth assignment module of REC is taken out some bandwidth resources from up HDLC link bandwidth resource pond, it is the primary bandwidth that 3 RE respectively distribute a certain size, each RE 50kbps for example is used for the communicating by letter of basic, small data quantity of the up HDLC sublink of RE and REC;
C) to upgrade synchronously the available bandwidth resources of resource pool be 330kpbs to the HDLC link bandwidth assignment module of REC;
D) the CPRI protocol module of the CPRI protocol module of the HDLC link bandwidth assignment module of REC notice REC and each RE carry out REC and each RE between foundation and the allocated bandwidth of up HDLC sublink;
E) the CPRI protocol module of the CPRI protocol module of REC and each RE according to the bandwidth of appointment set up REC and each RE between up HDLC sublink;
2. increase the up HDLC sublink of RE bandwidth flow process (using 2#RE to illustrate):
A) communication flows of the up HDLC sublink between the HDLC link bandwidth of 2#RE statistics and application module this RE of real-time statistics and the REC.
B) if up HDLC sublink communication flows increases to current bandwidth can't satisfy the demand, then need to increase up HDLC sublink bandwidth.How to determine whether satisfy the demand (namely applying for thresholding), concrete decision rule can be determined according to actual needs voluntarily.For example, the current bandwidth size reaches more than 90% and the duration surpasses 1 second when communication flows accounts for, and thinks that current link bandwidth can't satisfy the demand, and needs to increase bandwidth;
C) if need to increase HDLC sublink bandwidth, the HDLC link bandwidth of 2#RE is added up and is applied for that the HDLC link bandwidth assignment module of module to REC sends message request and increase link bandwidth.For the amount of bandwidth that increases, the HDLC link bandwidth of 2#RE statistics can be estimated the amount of bandwidth that need to increase with the application module, and disposable the application for example needs 50kbps, just applies for 50kbps; Also can not calculate, use fixed size to carry out the notch cuttype application, for example first to file increases the bandwidth of 20kpbs, then continues the monitoring communications flow, if bandwidth still can't satisfy the practical communication flow, continuation application increases 20kpbs;
D) after the HDLC link bandwidth assignment module of REC is received the increase link bandwidth request of 2#RE, determine whether the link bandwidth size of agreeing request and determining to allow to increase, concrete decision rule can be determined according to actual needs voluntarily, for example can be according to the size of available bandwidth in the amount of bandwidth of RE application and the current resource pool, if available bandwidth greater than the bandwidth of application, can distribute by the bandwidth application size; Otherwise, can refuse an application or distribute according to available bandwidth size.
E) amount of bandwidth of up HDLC sublink bandwidth and increase between the CPRI protocol module increase REC of the CPRI protocol module of the HDLC link bandwidth assignment module of REC notice REC and 2#RE and the 2#RE;
F) the CPRI protocol module of the CPRI protocol module of REC and 2#RE increases up HDLC sublink bandwidth between REC and the 2#RE according to the nominated bandwidth size;
G) after the up HDLC sublink bandwidth of 2#RE increases, the link bandwidth statistics of 2#RE and application module continue the communication flows of the up HDLC sublink between this RE of real-time statistics and the REC, if current bandwidth can't satisfy up HDLC sublink communication flows needs, continue the up HDLC sublink of above-mentioned increase bandwidth flow process; Perhaps after communication flows reduces, carry out the up HDLC sublink of minimizing described below bandwidth flow process;
3. reduce the up HDLC sublink of RE bandwidth flow process (using 2#RE to illustrate):
A) communication flows of the up HDLC sublink between the HDLC link bandwidth of 2#RE statistics and application module this RE of real-time statistics and the REC.
B) if current bandwidth can not fully take current bandwidth greater than primary bandwidth and current communication flows, namely the current bandwidth utilance is lower, to the HDLC link bandwidth assignment module request minimizing link bandwidth of REC.When should apply for reducing link bandwidth, concrete decision rule can be determined according to actual needs voluntarily.For example communication flows account for the current bandwidth size below 60% and the duration surpass 1 second, think that current link bandwidth utilization rate is lower, need to reduce the up HDLC sublink bandwidth of 2#RE, to discharge link bandwidth resource;
C) if need to reduce HDLC sublink bandwidth, the HDLC link bandwidth of 2#RE is added up and is applied for that the HDLC link bandwidth assignment module of module to REC sends message request and reduce link bandwidth.For the amount of bandwidth that reduces, the HDLC link bandwidth of 2#RE statistics and application module can be estimated the amount of bandwidth that need to reduce, and disposable the application for example needs to reduce 60kpbs, just once applies for reducing the bandwidth of 60kpbs; Also can not calculate, use fixed size to carry out the notch cuttype application, for example first to file reduces the bandwidth of 20kpbs, then continues the monitoring communications flow, if bandwidth availability ratio is still lower, continuation application reduces 20kpbs;
D) the HDLC link bandwidth assignment module of REC receives that the CPRI protocol module of the CPRI protocol module of notice REC after the minimizing link bandwidth request of 2#RE and 2#RE reduces the amount of bandwidth of up HDLC sublink bandwidth between REC and the 2#RE and minimizing;
E) the CPRI protocol module of the CPRI protocol module of REC and 2#RE reduces up HDLC sublink bandwidth between REC and the 2#RE according to the nominated bandwidth size;
F) after the up HDLC sublink bandwidth of 2#RE reduces, the link bandwidth statistics of 2#RE and application module continue the communication flows of the up HDLC sublink between this RE of real-time statistics and the REC, if bandwidth availability ratio is still lower, continue the up HDLC sublink of above-mentioned minimizing bandwidth flow process; Perhaps after communication flows reduces, increase up HDLC sublink bandwidth flow process.
Many functional parts described in this specification all are called as module, in order to emphasize more especially the independence of its implementation.
In the embodiment of the invention, module can realize with software, in order to carried out by various types of processors.For instance, the executable code module of a sign can comprise one or more physics or the logical block of computer instruction, and for instance, it can be built as object, process or function.However, the executable code of institute's identification module need not to be physically located in together, but can comprise the different instruction that is stored on the diverse location, when combining on these command logics, and its composition module and realize the regulation purpose of this module.
In fact, executable code module can be individual instructions or many instructions, and even can be distributed on a plurality of different code segments, be distributed in the middle of the distinct program, and cross over a plurality of memory devices and distribute.Similarly, operating data can be identified in module, and can realize and be organized in the data structure of any suitable type according to any suitable form.Described operating data can be used as the individual data collection and is collected, and perhaps can be distributed on the diverse location (to be included on the different storage device), and can only be present on system or the network as electronic signal at least in part.
When module can utilize software to realize, consider the level of existing hardware technique, so can be with the module of software realization, in the situation of not considering cost, those skilled in the art can build corresponding hardware circuit and realize corresponding function, and described hardware circuit comprises conventional ultra-large integrated (VLSI) circuit or gate array and the existing semiconductor such as logic chip, transistor or other discrete element.Module can also be used programmable hardware device, realizations such as field programmable gate array, programmable logic array, programmable logic device.
The above only is embodiments of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (15)
1. the distribution method of a High-Level Data Link Control HDLC link bandwidth, be applied to the public radio interface CPRI link that formed by communication link protection by a wireless device controls center REC and plural wireless device RE, it is characterized in that described method comprises:
Described RE adds up this RE to the communication flows of the up HDLC sublink of REC;
The communication flows that described RE obtains according to statistics and the current link bandwidth of described up HDLC sublink judge whether to need to adjust the link bandwidth of described up HDLC sublink;
Described RE sends bandwidth adjustment request message to described REC when judging the link bandwidth that needs the described up HDLC sublink of adjustment;
That described RE returns according to described REC, as to carry bandwidth adjustment amount bandwidth is adjusted response message, jointly adjusts the link bandwidth of described up HDLC sublink with described REC.
2. the method for claim 1 is characterized in that,
The described link bandwidth that judges whether to need to adjust described up HDLC sublink comprises:
Calculate the ratio of described communication flows and described current link bandwidth;
Surpass duration that the first thresholding and described ratio surpass described the first thresholding when reaching the second thresholding in described ratio, judge the link bandwidth that needs to increase described up HDLC sublink;
Be lower than duration that the 3rd thresholding and described ratio be lower than described the 3rd thresholding when reaching the 4th thresholding in described ratio, judgement need to reduce the link bandwidth of described up HDLC sublink.
3. the method for claim 1 is characterized in that,
When judging the link bandwidth that needs the described up HDLC sublink of adjustment, described RE further determines the expectation adjustment amount of link bandwidth, and carries described expectation adjustment amount in described bandwidth adjustment request message.
4. the method for claim 1 is characterized in that, before the communication flows of the up HDLC sublink of REC, described method also comprises at described this RE of statistics:
Described RE receives the original bandwidth allocation message that described REC sends, and described original bandwidth allocation message is used to indicate the initial bandwidth of distributing to described up HDLC sublink;
Described RE set up with described REC between up HDLC sublink, and according to described initial bandwidth to described REC transmission data.
5. the wireless device RE in the public radio interface CPRI link, described CPRI chain route wireless device controls center REC and plural described RE form by communication link protection, it is characterized in that described RE comprises:
The bandwidth statistical module is used for this RE of statistics to the communication flows of the up HDLC sublink of REC;
The application module, for the communication flows that obtains according to described bandwidth statistical module counts and the current link bandwidth of described up HDLC sublink, judge whether to need to adjust the link bandwidth of described up HDLC sublink, and when needs are adjusted the link bandwidth of described up HDLC sublink, send bandwidth adjustment request message to described REC;
The CPRI protocol module is used for bandwidth that return according to described REC, that carry the bandwidth adjustment amount and adjusts response message, jointly adjusts the link bandwidth of described up HDLC sublink with described REC.
6. RE as claimed in claim 5 is characterized in that, described application module comprises:
Calculating sub module is for the ratio of calculating described communication flows and described current link bandwidth;
First judges submodule, is used for surpassing duration that the first thresholding and described ratio surpass described the first thresholding when reaching the second thresholding in described ratio, judges the link bandwidth that needs to increase described up HDLC sublink;
Second judges submodule, is used for being lower than duration that the 3rd thresholding and described ratio be lower than described the 3rd thresholding when reaching the 4th thresholding in described ratio, and judgement need to reduce the link bandwidth of described up HDLC sublink.
7. RE as claimed in claim 5 is characterized in that,
Described application module also is used for further determining the expectation adjustment amount of link bandwidth, and carry described expectation adjustment amount in described bandwidth adjustment request message when judging the link bandwidth that needs the described up HDLC sublink of adjustment.
8. RE as claimed in claim 5 is characterized in that,
Described CPRI protocol module also is used for the up HDLC sublink between foundation and the described REC, receives the original bandwidth allocation message that described REC sends, and sends data according to described initial bandwidth to described REC.
9. the distribution method of a High-Level Data Link Control HDLC link bandwidth, be applied to the public radio interface CPRI link that formed by communication link protection by a wireless device controls center REC and plural wireless device RE, it is characterized in that described method comprises:
Described REC receives the bandwidth adjustment request message that described RE sends, described bandwidth adjustment request message is that described RE is at the communication flows of the up HDLC sublink that arrives REC according to this RE and the current link bandwidth of described up HDLC sublink, judge when needing to adjust the bandwidth of described up HDLC sublink, send to described REC;
Described REC determines the bandwidth adjustment amount of described up HDLC sublink according to described bandwidth adjustment request, and adjusts response message to the bandwidth that described RE feedback carries the bandwidth adjustment amount;
Described REC adjusts the link bandwidth of described up HDLC sublink according to described bandwidth adjustment amount.
10. method as claimed in claim 9 is characterized in that, the described bandwidth adjustment amount of determining described up HDLC sublink comprises:
Described REC adjusts strategy according to pre-set bandwidths, judges whether to agree to carry out the bandwidth adjustment based on described bandwidth adjustment request message:
When agreeing that carrying out bandwidth adjusts, determine the bandwidth adjustment amount of described up HDLC sublink;
When refusal carries out the bandwidth adjustment, feed back a bandwidth to described RE and adjust refuse information.
11. method as claimed in claim 9 is characterized in that, before the bandwidth adjustment request message that the described RE of described reception sends, described method also comprises:
Described REC is defined as the initial bandwidth of the described up HDLC sublink of described RE distribution;
Described REC sends original bandwidth allocation message to described RE, and described original bandwidth allocation message is used to indicate the initial bandwidth of distributing to described up HDLC sublink;
Described REC is according to described initial bandwidth, and the up HDLC sublink between foundation and the described RE is also distributed described initial bandwidth for described RE.
12. the wireless device controls center REC in the public radio interface CPRI link, the described described REC of CPRI chain route and plural wireless device RE form by communication link protection, it is characterized in that described REC comprises:
The request receiving module, be used for receiving the bandwidth adjustment request message that described RE sends, described bandwidth adjustment request message is that described RE is at the communication flows of the up HDLC sublink that arrives REC according to this RE and the current link bandwidth of described up HDLC sublink, judge when needing to adjust the bandwidth of described up HDLC sublink, send to described REC;
Bandwidth allocation module is used for according to described bandwidth adjustment request, determines the bandwidth adjustment amount of described up HDLC sublink, and adjusts response message to the bandwidth that described RE feedback carries the bandwidth adjustment amount;
The CPRI protocol module is used for according to described bandwidth adjustment amount, adjusts the link bandwidth of described up HDLC sublink.
13. REC as claimed in claim 12 is characterized in that, described bandwidth allocation module comprises:
Judge submodule, be used for adjusting strategy according to pre-set bandwidths, judge whether to agree to carry out the bandwidth adjustment based on described bandwidth adjustment request message:
Determine submodule, be used for when agreeing that carrying out bandwidth adjusts, determining the bandwidth adjustment amount of described up HDLC sublink;
The refusal submodule is used for feeding back a bandwidth to described RE and adjusting refuse information when refusal carries out the bandwidth adjustment.
14. REC as claimed in claim 12 is characterized in that,
Described bandwidth allocation module, also be used for being defined as the initial bandwidth of the described up HDLC sublink that described RE distributes, and to described RE transmission original bandwidth allocation message, described original bandwidth allocation message is used to indicate the initial bandwidth of distributing to described up HDLC sublink;
Described CPRI protocol module also is used for according to described initial bandwidth, and the up HDLC sublink between foundation and the described RE is also distributed described initial bandwidth for described RE.
15. base station system, it is characterized in that, comprise each described REC of a claim 12 to 14, also comprise plural, such as each described RE of claim 5 to 8, wherein, described REC and plural described RE form the CPRI link by communication link protection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210118834.3A CN103379551B (en) | 2012-04-20 | 2012-04-20 | A kind of distribution method and equipment of High-Level Data Link Control link bandwidth |
| PCT/CN2012/088118 WO2013155861A1 (en) | 2012-04-20 | 2012-12-31 | Method and device for allocating bandwidth of high-level data link control link |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210118834.3A CN103379551B (en) | 2012-04-20 | 2012-04-20 | A kind of distribution method and equipment of High-Level Data Link Control link bandwidth |
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| WO2016095351A1 (en) * | 2014-12-19 | 2016-06-23 | 中兴通讯股份有限公司 | Bandwidth adjustment method, device, and computer storage medium |
| CN105900390A (en) * | 2014-07-21 | 2016-08-24 | 华为技术有限公司 | Link control node, link control method and communication system |
| CN113783802A (en) * | 2021-08-09 | 2021-12-10 | 新华三大数据技术有限公司 | Bandwidth adjusting method and system |
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| CN105490967A (en) * | 2014-09-17 | 2016-04-13 | 中兴通讯股份有限公司 | Bandwidth allocation method and device |
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| CN101316233A (en) * | 2008-06-19 | 2008-12-03 | 华为技术有限公司 | Flow control method and system, bearing layer equipment |
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| CN105900390B (en) * | 2014-07-21 | 2019-04-26 | 华为技术有限公司 | Link control node, chainlink control method and communication system |
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Also Published As
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| CN103379551B (en) | 2017-05-31 |
| WO2013155861A1 (en) | 2013-10-24 |
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