CN1157886C - Consultative code resource-distributing method in CDMA system - Google Patents
Consultative code resource-distributing method in CDMA system Download PDFInfo
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- CN1157886C CN1157886C CNB011263067A CN01126306A CN1157886C CN 1157886 C CN1157886 C CN 1157886C CN B011263067 A CNB011263067 A CN B011263067A CN 01126306 A CN01126306 A CN 01126306A CN 1157886 C CN1157886 C CN 1157886C
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Abstract
The present invention relates to a method for negotiating and distributing a code resource between a source base station controller and a target base station controller when a radio link of the base station controller is established/reconfigured in a code division multiple access (CDMA) system. The method comprises the following steps: the source base station controller sends out a request of establishment/reconfiguration of the radio link; the target base station controller judges whether an idle channel code corresponding to the code resource information exists or not and whether a code resource equivalent to the code resource information exists or not; the target base station controller sends out a failure response of establishment/reconfiguration of the radio link, which comprises code resource negotiation information; the source base station controller judges whether the code resource negotiation information can be received or not; if the code resource negotiation information can be received, the source base station controller sends out the request of establishment/reconfiguration of the radio link, which comprises the code resource information after negotiation to the target base station controller, and the target base station controller sends out a successful response of establishment/reconfiguration of the radio link to the source base station controller, wherein the response comprises channel code numbers which are used for being distributed; if the code resource negotiation information can not be received, the request of establishment/reconfiguration of the radio link fails.
Description
Invention field
The present invention relates to mobile communication system, relate in particular to the method that Consultative code resource distributes when the Radio Link of cross base station controller is set up or reshuffled in the CDMA mobile communication systems.
Technical background
In code division multiple access (CDMA) system, channel code and scrambler are Limited resources.At up direction, mainly use scrambler to distinguish channel.And at down direction, a scrambler group (generally main use main scrambler) is used in each sub-district, so scrambler can not be used for distinguishing channel, and will lean on channel code.In cdma system, when guaranteeing the interchannel quadrature,, need provide variable-data-rate, so orthogonal variable frequency extension factor code (OVSF) is distributed to different channels as channel code in order to satisfy the different business that different service quality requires.
Fig. 1 shows the code tree structure of this ovsf code.As shown in Figure 1, during as if request SF=4, then there are four channel code can supply to distribute at most: OVSF
4.0, OVSF
4.1, OVSF
4.2, OVSF
4.3, during as if request SF=8, then have eight channel code can supply to distribute at most: OVSF
8.0, OVSF
8.1..., OVSF
8.7, the rest may be inferred.As seen, they guarantee the orthogonality between the different physical channels, and because their spreading factor is variable, so applicable to the different pieces of information rate requirement.Yet the sign indicating number resource is limited in the sub-district, and sign indicating number divides timing should follow following principle under the requirement of satisfying channel data rates: keep the little sign indicating number of spreading factor as far as possible and think that system keeps more resources.
Now, with reference to Fig. 2 the signaling process that the Radio Link of cross base station controller is in the prior art set up/reshuffled is shown.In the prior art, if the source base station controller by algorithmic decision decision newly-built at target base station controller/reshuffle the Radio Link between Target cell and the subscriber equipment, the source base station controller will send Radio Link foundation/reconfiguration request message to target base station controller so, comprise the code resource information that request distributes (comprising the spreading factor SF of channel code and the number of request channel code) in the message.Target cell in the target base station controller is according to current cell code resource allocation situation, and solicited message is come the assigned code resource.If sign indicating number resource allocation success and Radio Link are set up/reshuffled successfully, target base station controller will send Radio Link to the source base station controller and set up/reshuffle success response message, comprising the sign indicating number resource for distribution; The sign indicating number resource that does not meet the request requirement as if Target cell in the target base station controller can be for distributing (occupied as the channel code of asking corresponding spreading factor), then can cause foundation/reconfiguration failure, target base station controller is to the response message of source base station controller transmission Radio Link foundation/reconfiguration failure, and the failure cause that carries in the message is not supported by the spreading factor of indication request or the channel code number is not supported.
We will explain term " Radio Link of cross base station controller " at this.It refers to, such Radio Link, that is, subscriber equipment communicates with the Target cell that is subjected to target base station controller control, and target base station controller by with the source base station controller between link with core net and communicate.Term " is reshuffled " and is referred to, and when the required data rate of the message transmission between subscriber equipment and the Target cell lowered or rises, the spreading factor and the quantity that need to adjust channel code were given subscriber equipment to redistribute suitable channel capacity.
From above-mentioned analysis can find out that the Radio Link of this cross base station controller is set up or reconfiguration course the sign indicating number allocation strategy perfect not enough, its thought mainly is to distribute a requirement by source base station controller decision sign indicating number.In fact, the source base station controller is not considered the sign indicating number resource actual allocated situation of Target cell in the target base station controller, therefore tend to cause Radio Link foundation or reconfiguration failure under the sign indicating number resource situation of Target cell not knowing, especially for subscriber equipment, set up or reshuffle its article one Radio Link by cross base station controller, should guarantee its success as far as possible.Further it, both made and set up or reshuffle successfully, but because source base station controller decision sign indicating number resource requirement (spreading factor and channel code number) is based on itself algorithm requirements, do not consider the sign indicating number resource utilization of Target cell in the target base station controller, will cause the unreasonable distribution of Target cell sign indicating number resource like this.Therefore, the defective key of above-mentioned strategy is: lack the negotiations process of Target cell actual code allocation situation in a kind of sign indicating number distribution requirements of source base station controller and the target base station controller, so can cause the failure of setting up or reshuffling under many circumstances, and cause the waste of resource.
Summary of the invention
The technical problem to be solved in the present invention provides in a kind of Radio Link process of setting up cross base station controller in cdma system, carry out the method for Consultative code resource between source base station controller and target base station controller, described method makes the source base station controller can consider the sign indicating number resource situation of target base station controller in the request code resource.
According to the technical problem to be solved in the present invention, when providing a kind of and in code division multiple access system, setting up/reshuffle the Radio Link of cross base station controller, between source base station controller and target base station controller, carry out the method that Consultative code resource distributes, comprise the following steps; A. described source base station controller sends Radio Link foundation/reconfiguration request to target base station controller, and wherein said request comprises code resource information; B. described target base station controller judges whether the channel code with the described corresponding free time of code resource information, if having, then enters step f, if do not have, then enters step c; C. described target base station controller judges whether to exist the sign indicating number resource with described code resource information equivalence, if, then enter steps d, if not, then set up/reshuffle the Radio Link Failure and the end of cross base station controller; D. described target base station controller sends the response of Radio Link foundation/reconfiguration failure to described source base station controller, comprising Consultative code resource information; E. described source base station controller judges whether described Consultative code resource information can be accepted, if, then described source base station controller sends the Radio Link foundation/reconfiguration request of the code resource information after comprising described negotiation and enters step f to target base station controller, if not, then foundation/reconfiguration failure and end; F. described target base station controller sends Radio Link and sets up/reshuffle success response to described source base station controller, and wherein said response comprises for the channel code sign indicating number that distributes number.
According to code-resource distribution method of the present invention, owing between source base station controller and target base station controller, set up negotiation step, thereby make the source base station controller can recognize the sign indicating number resource allocation conditions that the target base station controller Target cell is current, thereby determine whether accepting the Consultative code resource information that target base station controller provides according to service rate requirement and the situation of self.Like this, can greatly must improve the Radio Link foundation of cross base station controller or the probability of success of reshuffling, and can reasonably use the sign indicating number resource of Target cell in the target base station controller, improve its utilance, the systematic function of avoiding causing because of the sign indicating number wasting of resources descends.
Description of drawings
Fig. 1 shows and be used for the ovsf code tree structure that sign indicating number distributes in cdma system;
Fig. 2 shows in the prior art and sets up/reshuffle the signaling process of the Radio Link of cross base station controller;
Fig. 3 shows according to preferred embodiment of the present invention, sets up/reshuffle the process flow diagram of the Radio Link of cross base station controller;
Fig. 4 shows the flow chart of the concrete deterministic process of step S35 among Fig. 3;
Fig. 5 shows according to preferred embodiment of the present invention, is setting up/reshuffling the signaling process that carries out Consultative code resource in the Radio Link process of cross base station controller.
Embodiment
Below with reference to Fig. 3-5 preferred embodiment of the present invention is described.
Referring now to Fig. 3, illustrate according to preferred embodiment of the present invention, set up/reshuffle the steps flow chart of the Radio Link of cross base station controller.When the Radio Link of the cross base station controller between the Target cell of subscriber equipment under controlling with target base station controller is set up/is reshuffled in source base station controller decision, the source base station controller at first sends Radio Link foundation/reconfiguration request (as the step S31 among Fig. 3) to target base station controller, carry in this request by the source base station controller draw according to internal algorithm and subscriber equipment and Target cell between the required corresponding code resource information of speed of transport service, this code resource information comprises spreading factor (SF) and the number (NUM) of distributing to the channel code of Radio Link between subscriber equipment and the Target cell.The source base station controller can satisfy professional transmission demand according to the code resource information that algorithm draws.
Target base station controller after receiving this request, judge whether to exist with from the corresponding idle channel sign indicating number of the code resource information of source base station controller (S32).If there be the idle channel sign indicating number corresponding in the Target cell of target base station controller with this code resource information, for example, source base station controller designated code resource information SF=4, NUM=1, that is, requiring spreading factor is a channel code of 4, and just in time have idle OVSF this moment in the Target cell
4.3, target base station controller sends Radio Link to the source base station controller and sets up/reshuffle success response so, and wherein the channel code sign indicating number number (OVSF of distribution is carried in this response
4.3) (S37).If but this moment, not having idle spreading factor in the Target cell is 4 channel code, target base station controller judges whether to exist and sign indicating number resource (S33) from the code resource information equivalence of source base station controller so.That is, if the channel code OVSF in the Target cell
4.0And OVSF
4.1Or its branch's sign indicating number is all occupied, has only channel code OVSF
4.2In the sign indicating number OVSF of branch
8.4And OVSF
4.3In the sign indicating number OVSF of branch
8.6Unoccupied, this moment, target base station controller was judged the sign indicating number resource that has equivalence so.Because spreading factor is that (perhaps SF=16, NUM=4) being equivalent to spreading factor is 1 channel code of 4 for 2 channel code of 8.But, if do not have and code resource information SF=4 in the Target cell, the sign indicating number resource of NUM=1 equivalence, the target base station controller judgement does not exist so, and this moment, flow process entered step S38, Radio Link foundation/reconfiguration failure.It should be noted that target base station controller when judging the equivalent code resource, should judge and the sign indicating number resource of trying one's best little from the spreading factor of the sign indicating number resource equivalence of source base station controller.Because spreading factor is more little, the data rate that is suitable for is big more to satisfy the professional transmission demand of subscriber equipment as much as possible.
After target base station controller was judged the sign indicating number resource that has equivalence, target base station controller sent the response of Radio Link foundation/reconfiguration failure to the source base station controller, carries Consultative code resource information (SF=8, NUM=2) (S34) as mentioned above, in this response.The source base station controller judges whether Consultative code resource information can be accepted (S35) after receiving this response.The source base station controller can be considered a plurality of factors in deterministic process, comprising: data rate, the priority situation of Radio Link and the loading condition of Target cell that Consultative code resource information is suitable for, or the like.
Below, with reference to Fig. 4, specifically describe according to preferred embodiment of the present invention, to set up/reshuffling in the Radio Link process of cross base station controller, the source base station controller is judged from the Consultative code resource information of target base station controller acceptable flow chart whether.
At first, the source base station controller judge according to internal algorithm calculate with the business demand (S41) that whether satisfies the user from the corresponding data rate of the Consultative code resource information of target base station controller.Because data rate depends primarily on the spreading factor of channel code, spreading factor is big more, and the data rate of support is more little, and vice versa.And the spreading factor in the code resource information that carries in the request that often spreading factor in the Consultative code resource information originally sent than source base station controller is big, therefore, the source base station controller will judge whether the data rate users business that is suitable in the Consultative code resource information can be accepted.If the judged result among the step S41 is dissatisfied, expression is not accepted so, then Radio Link foundation/reconfiguration failure (the step S38 among Fig. 3).If the judged result among the step S41 satisfies, the source base station controller is followed the continuation judgement and is set up Radio Link or reconfiguring radio link (S42) so.Because, the priority of setting up Radio Link will be higher than reconfiguring radio link, and change the different situations of setting up Radio Link when setting up the Radio Link of setting up cross base station controller when Radio Link comprises soft handover and non-soft cutting, therefore, the source base station controller judges whether to set up Radio Link (S43) under case of soft handover.If under the situation that non-soft handover is set up, the Radio Link of subscriber equipment and Target cell is unique Radio Link that the user communicates, and under the situation that soft handover is set up, cell-of-origin under subscriber equipment and the source base station controller keeps wireless link, and also sets up Radio Link between subscriber equipment and the Target cell.This shows that under non-case of soft handover, the priority of setting up Radio Link is the highest, in other words, the source base station controller will guarantee the foundation success of this Radio Link as far as possible.Therefore, in this case, as long as the data rate that Consultative code resource information is suitable for meets the demand of customer service, the source base station controller is promptly represented and can be accepted so, and in the step S36 of Fig. 3, send the Radio Link request of setting up to target base station controller, carry the code resource information after the negotiation in this request.In this preferred embodiment, if under case of soft handover, set up Radio Link, the source base station controller can further be judged according to the situation of self so, that is, judge that whether the source base station controller can rebulid Radio Link (S44) between cell-of-origin and the subscriber equipment by the sign indicating number negotiation information.Because under case of soft handover, subscriber equipment while and cell-of-origin and Target cell wireless link, therefore when the link of setting up with yard negotiation information between subscriber equipment and the Target cell, to reshuffle link between subscriber equipment and the cell-of-origin with this yard negotiation information equally.When the source base station controller was judged the Radio Link that can reshuffle according to the sign indicating number negotiation information between cell-of-origin and the subscriber equipment, expression can be accepted.Otherwise, then to represent unacceptablely, Radio Link is set up failure.
Judge it is to reshuffle when the source base station controller in step S42, it continues to judge whether to reshuffle under the situation of soft handover so.If, the source base station controller continues to judge that whether it can reshuffle Radio Link (S46) between cell-of-origin and the subscriber equipment according to Consultative code resource information so, because under the situation of soft handover, there are two links (subscriber equipment and cell-of-origin and subscriber equipment and Target cell) simultaneously, therefore reshuffling with the channel code after consulting between subscriber equipment and the Target cell in the Radio Link, also need come Radio Link between configure user equipment and the cell-of-origin with them.Can not reshuffle link between cell-of-origin and the subscriber equipment according to Consultative code resource information if the judged result of source base station controller in step S46 is it, represent so unacceptable, the radio link reconfiguration failure.If, so also need do further judgement according to the reason of reshuffling and the loading condition of Target cell if the judged result in step S45 is to be link between reconfigurable cell-of-origin and the subscriber equipment reshuffling Radio Link between subscriber equipment and the Target cell and the judged result in step S46 under the situation of non-soft handover.This be because, reshuffling can be that data rate owing to customer service changes and causes, when rising or descend, traffic data rate all needs to reshuffle channel capacity between subscriber equipment and the Target cell, that is, need to divide the different channels capacity that is equipped with new sign indicating number resource (spreading factor and channel code number).Certainly, if reshuffle successfully, can satisfy the professional demand that changes so better.If but because the present situation (the particularly loading condition of Target cell) of Target cell, and the transmission rate that can not satisfy between subscriber equipment and the Target cell changes requirement, the source base station controller is just no longer reshuffled so.Like this, linking or exist between subscriber equipment and the Target cell still can communicate between them.
Based on above-mentioned principle, the source base station controller judges that in step S47 reshuffling because service rate rises still is to descend to causing.If rise, judge further then whether the load of Target cell weighs (S48).If heavy, the expression Target cell can not be born higher data rate, also just need not to improve traffic data rate by reconfiguring radio link again, and promptly represent unacceptable this moment, the radio link reconfiguration failure.And if that the judged result of step S48 is load is light, the expression Target cell can also be born higher data rate, and this moment, promptly expression can accept to reshuffle requirement.
If judging to reshuffle because service rate descends in step S47, the source base station controller causes.Whether the load of so further judging target weighs (S49).If heavy, expression need alleviate the data rate in the Target cell, and i.e. expression this moment accepts to reshuffle requirement to lower data rate.If cell load is light, Target cell has the ability to distribute to the wideer bandwidth of subscriber equipment so, even the data rate of customer service descends.At this moment, reconfigurable, also reconfiguring radio link not.In the present embodiment, represent unacceptable, that is, and radio link reconfiguration failure.Certainly, also can represent to accept.
It more than is the concrete deterministic process of describing the determining step S35 among Fig. 3.It should be noted that the source base station controller can judge according to the situation of actual wireless link and the situation of itself.For example, in the step S41 of source base station controller in Fig. 4, judgement can be satisfied business need, i.e. expression can be accepted, if can not satisfy, promptly represents unacceptable.And for example, in step S42, set up as judging, then expression can be accepted, if reshuffle, then represents unacceptable.In step S43, if under non-case of soft handover, then expression can be accepted, if under the expression case of soft handover, then represent unacceptable.Also be like this for step S45 equally.And for example, in step S47, if descend, then expression can be accepted, if the then expression of rising is not accepted.Suchlike variation all is interpreted as within the scope of the invention.
Among the step S35 in Fig. 3, if judge unacceptable, so wireless foundation/reconfiguration failure.If judge and to accept that then the source base station controller sends Radio Link foundation/reconfiguration request to target base station controller in step S36, comprising code resource information through consulting.Target base station controller is after receiving this request, because of the sign indicating number channel resource after consulting, therefore necessarily there be the channel code corresponding in the Target cell under the target base station controller with it, set up/reshuffle success response so send Radio Link, comprising the channel code sign indicating number number (S37) that distributes to the source base station controller.
Fig. 5 is illustrated in and sets up/when reshuffling the Radio Link of cross base station controller, carry out the signaling process figure of Consultative code resource process.At first, the source base station controller sends Radio Link foundation/reconfiguration request to target base station controller, wherein carries the sign indicating number resource of request.Target base station controller sends the response of Radio Link foundation/reconfiguration failure to the source base station controller after decision equivalent code resource information then, wherein carries Consultative code resource information.After adjudicating according to the algorithm of inside, the source base station controller sends Radio Link foundation/reconfiguration request, comprising request resource applicatory to target base station controller.
It more than is description to preferred embodiment of the present invention, as seen Consultative code resource-distributing method of the present invention, when the Target cell under the target base station controller the channel code not corresponding with the sign indicating number resource of source base station controller request, do not send failure response at once, but judge whether equivalent sign indicating number resource, if have, promptly hold consultation with the source base station controller.And the source base station controller also can judge whether this negotiation sign indicating number resource can be accepted according to situation own and customer service situation.Like this, just can make foundation/reconfiguring radio link successful, to satisfy the needs of customer service as far as possible.Compared with prior art, negotiation mechanism of the present invention more flexibly and avoided the waste of channel code resource.
More than be description, should be understood that this description just is used to illustrate principle of the present invention but not it is limited preferred embodiment of the present invention.Any variation that principle according to the present invention is carried out preferred embodiment all drops on by in the appended claims restricted portion.
Claims (11)
1. during a Radio Link of in code division multiple access system, setting up/reshuffle cross base station controller, between source base station controller and target base station controller, carry out the method that Consultative code resource distributes, comprise the following steps;
A. described source base station controller sends Radio Link foundation/reconfiguration request to target base station controller, and wherein said request comprises code resource information;
B. described target base station controller judges whether the channel code with the described corresponding free time of code resource information, if having, then enters step f, if do not have, then enters step c;
C. described target base station controller judges whether to exist the sign indicating number resource with described code resource information equivalence, if, then enter steps d, if not, then set up/reshuffle the Radio Link Failure and the end of cross base station controller;
D. described target base station controller sends the response of Radio Link foundation/reconfiguration failure to described source base station controller, comprising Consultative code resource information;
E. described source base station controller judges whether described Consultative code resource information can be accepted, if, then described source base station controller sends the Radio Link foundation/reconfiguration request of the sign indicating number channel resource after comprising described negotiation and enters step f to target base station controller, if not, then foundation/reconfiguration failure and end;
F. described target base station controller sends Radio Link and sets up/reshuffle success response to described source base station controller, and wherein said response comprises for the channel code sign indicating number that distributes number.
2. as claimed in claim 1ly carry out the method that Consultative code resource distributes, it is characterized in that, the code resource information of described equivalence is the code resource information code resource information equivalence, the spreading factor minimum with the request of described source base station controller.
3. method of carrying out the Consultative code resource distribution as claimed in claim 1 is characterized in that described source base station controller judges whether acceptable step comprises described Consultative code resource information:
Described source base station controller judge according to described Consultative code resource information calculate data rate whether satisfy business demand, if then expression can be accepted, if otherwise represent unacceptable.
4. method of carrying out the Consultative code resource distribution as claimed in claim 3 is characterized in that described source base station controller judges whether acceptable step also comprises described Consultative code resource information:
If according to described Consultative code resource information calculate data rate satisfy business demand, Radio Link or reconfiguring radio link are set up in so described source base station controller judgement, if set up Radio Link, then expression can be accepted, if reconfiguring radio link is then represented unacceptable.
5. method of carrying out the Consultative code resource distribution as claimed in claim 4 is characterized in that described source base station controller judges whether acceptable step also comprises described Consultative code resource information:
If judge it is to set up Radio Link, so described source base station controller judges whether it is to set up Radio Link under case of soft handover, if, then represent unacceptablely, if not, then expression can be accepted.
6. method of carrying out the Consultative code resource distribution as claimed in claim 5 is characterized in that described source base station controller judges whether acceptable step also comprises described Consultative code resource information:
If judge it is under case of soft handover, to set up Radio Link, so described source base station controller judges that whether it can reshuffle Radio Link between cell-of-origin and the subscriber equipment according to described Consultative code resource information, if then expression can be accepted, if not, then represent unacceptable.
7. as the described method of carrying out the Consultative code resource distribution of arbitrary claim among the claim 4-6, it is characterized in that described source base station controller judges whether acceptable step also comprises described Consultative code resource information:
If judge it is reconfiguring radio link, the source base station controller judges whether to reshuffle under case of soft handover so, if then expression is not accepted, if not, then expression is accepted.
8. method of carrying out the Consultative code resource distribution as claimed in claim 7 is characterized in that described source base station controller judges whether acceptable step also comprises described Consultative code resource information:
If judge it is under case of soft handover, to reshuffle, so described source base station controller judges that whether it can reshuffle linking between cell-of-origin and the subscriber equipment according to described Consultative code resource information, if then expression can be accepted, if not, then represent unacceptable.
9. as claim 7 or 8 described methods of carrying out the Consultative code resource distribution, it is characterized in that described source base station controller judges whether acceptable step also comprises described Consultative code resource information:
If at reconfiguring radio link under the non-case of soft handover or judge that described source base station controller can reshuffle link between cell-of-origin and the subscriber equipment according to described Consultative code resource information, so described source base station controller judge described reshuffle because service rate rise cause or because service rate descends and causes;
Cause if rise, then to represent unacceptablely, to cause that then expression can be accepted if descend.
10. method of carrying out the Consultative code resource distribution as claimed in claim 9 is characterized in that described source base station controller judges whether acceptable step also comprises described Consultative code resource information:
If described reshuffling is because service rate rises, judge then whether the load of Target cell heavy, if heavy, then represent unacceptable, if gently expression can accept.
11. method of carrying out the Consultative code resource distribution as claimed in claim 9 is characterized in that described source base station controller judges whether acceptable step also comprises described Consultative code resource information:
If described reshuffling is because service rate descends, judge then whether the load of Target cell is heavy, if heavy, then expression can accept to reshuffle requirement, if gently then represent reconfigurablely also can not reshuffle.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1790961B (en) * | 2005-12-29 | 2011-05-11 | 中兴通讯股份有限公司 | Wireless communication system channel adjusting method based on orthogonal variable spread-spectrum factor code |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100382651C (en) * | 2004-12-09 | 2008-04-16 | 华为技术有限公司 | Method for realizing hard switching |
| CN100403823C (en) * | 2005-07-08 | 2008-07-16 | 华为技术有限公司 | Demodulation resource distribution method based on wireless link |
| CN101248688B (en) * | 2005-11-29 | 2011-02-02 | 中兴通讯股份有限公司 | Synchronization implementing method of base station asynchronous wireless links reconfiguration course |
| CN101635958B (en) * | 2008-07-25 | 2012-06-27 | 华为技术有限公司 | Method and device for distributing channel mode resources |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1790961B (en) * | 2005-12-29 | 2011-05-11 | 中兴通讯股份有限公司 | Wireless communication system channel adjusting method based on orthogonal variable spread-spectrum factor code |
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