CN101505511B - Method and network element for allocating service channel resource - Google Patents
Method and network element for allocating service channel resource Download PDFInfo
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- CN101505511B CN101505511B CN2009101060329A CN200910106032A CN101505511B CN 101505511 B CN101505511 B CN 101505511B CN 2009101060329 A CN2009101060329 A CN 2009101060329A CN 200910106032 A CN200910106032 A CN 200910106032A CN 101505511 B CN101505511 B CN 101505511B
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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Abstract
The invention discloses a method for allocating service channel resources. The method comprises the following steps of: receiving a routing update message from the terminal, wherein the routing update message carriers routing update information of a terminal; sending an A16 session request message to an object access network, wherein the A16 session request message carriers the routing update information and the information about a frequency currently used by the terminal; and receiving an A16 session transfer response message sent by the object access network, wherein the A16 session transfer response message carriers the service channel resource information allocated to the terminal by the object access network according to the routing update information and the frequency information of the currently used channel. Moreover, the invention also discloses a network element for allocating the service channel resources. By the method and the network element, the object access network can allocate the service channel to the terminal according to the frequency information of the channel reported by the terminal, thereby improving the switching success rate to a large extent.
Description
Technical field
The invention belongs to communication technical field, relate in particular to a kind of in handoff procedure the method and the network element of distribution service channel resource.
Background technology
In CDMA 2000 HRPD (high rate packet data) Radio Transmission Technology (CDMA2000 1xEV-DO) system, as AT (Access Terminal, access terminal) gradually from source AN (Access Network, when access network) Qu Yu edge moves to target AN zone, AT can report RU (RouteUpdate to source AN, routing update) message can be carried the pilot frequency information (as reference pilot signal intensity) of source AN and the pilot signal strength of detected target AN in the RU message.After source AN receives the RU message that AT reports, according to the switch decision algorithm, surpass default thresholding if find the pilot signal strength of target AN, then will send A16 session transfer request message, comprise the RU message that AT reports in this A16 session transfer request message to target AN.After target AN receives the A16 session transfer request message that source AN sends, pilot signal strength information according to the target AN that comprises in the RU message, distribute the corresponding business channel resource to AT, send A16 session transfer response message to source AN then, comprise the traffic channel resource information that target AN distributes in this A16 session transfer response message.Source AN sends TCA (TrafficChannelAssignment, Traffic Channel Assignment) message to AT after receiving this message, and AT leaves source AN and is linked into target AN after receiving this message.
The inventor finds under study for action, existing air protocol regulation, when AT moves to target AN zone gradually from the edge in AN zone, source, target AN can only be that AT distributes a frequency according to default algorithm according to the pilot signal strength of the target AN that comprises in the RU message, but the frequency AT of this distribution might not detect, perhaps the frequency signal that should distribute is very poor, and it is not very high can causing handover success rate thus.
Summary of the invention
The embodiment of the invention provides a kind of method of distribution service channel resource, and the frequency point information of the channel that can report according to AT by this method target AN is an AT distribution service channel resource, has improved success rate for switching to a great extent.
The method one that the embodiment of the invention provides may further comprise the steps:
The source access network receives the routing update message to terminal, comprises the routing update information of described terminal in the described routing update message;
The source access network sends A16 session transfer request message to target access network, comprises the frequency point information of the channel of described routing update information and the current use of described terminal in the described A16 session transfer request message;
The source access network receives the A16 session transfer response message that described target access network sends, and comprises in the described A16 session transfer response message that described target access network is the traffic channel resource information of described terminal distribution according to the frequency point information of the channel of described routing update information and the current use of described terminal.
The method two that the embodiment of the invention provides may further comprise the steps:
The A16 session transfer request message that target access network reception sources access network sends comprises the frequency point information of the channel of the routing update information of terminal and the current use of described terminal in the described A16 session transfer request message;
Target access network is obtained the target pilot information of described terminal according to the frequency point information of the channel of routing update information in the described A16 session transfer request message and the current use of described terminal, and gives described terminal distribution corresponding business channel resource.
Target access network sends A16 session transfer response message to described source access network, comprises in the described A16 session transfer response message that described target access network is the traffic channel resource information of described terminal distribution.
In addition, embodiments of the invention also provide a kind of network element, and this network element comprises:
First receiver module is used for the routing update message that receiving terminal sends, and comprises the routing update information of terminal in the described routing update message.
First sending module, be used for after described first receiver module receives the routing update message of described terminal transmission, send A16 session Transfer Message to target access network, comprise the frequency point information of the channel of described routing update information and the current use of described terminal in this A16 session Transfer Message.
Second receiver module, be used to receive the extremely A16 session transfer response message of described target access network, comprise in this A16 session transfer response message that described target access network is the traffic channel resource information of described terminal distribution according to the frequency point information of the channel of described routing update information and the current use of described terminal.
Embodiments of the invention also provide another kind of network element, and this network element comprises:
Receiver module is used to receive the A16 session transfer request message of coming to the source access network, comprises the frequency point information of the channel of the routing update information of terminal and the current use of terminal in this A16 session transfer request message;
Distribution module is used for obtaining according to the frequency point information of the channel of described routing update information and the current use of described terminal the target pilot information of described terminal, and gives described terminal distribution corresponding business channel resource;
Sending module is used for sending A16 session transfer response message to the source access network, and this A16 session transfer response message comprises that described distribution module is the traffic channel resource information of described terminal distribution.
By method and the network element that the invention described above provides, the frequency point information of the channel that target AN can report according to AT is an AT distribution service channel resource, has improved success rate for switching thus.
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method embodiment one;
Fig. 2 is the signal flow schematic diagram of the inventive method embodiment two;
Fig. 3 is the signal flow schematic diagram of the inventive method embodiment three;
Fig. 4 is the structural representation of the present invention first network element embodiment;
Fig. 5 is the structural representation of the present invention second network element embodiment.
Embodiment
The embodiment of the invention provides a kind of scheme of distribution service channel resource, the frequency point information of the channel that can report according to AT by this scheme target AN is an AT distribution service channel resource, solved thus that target AN is that AT distributes frequency according to default algorithm in the prior art, caused the low problem of handover success rate.
Referring to shown in Figure 1, be the method flow schematic diagram of the embodiment of the invention one, this method specifically comprises the steps:
Step 101: source AN receives the RU message to AT, comprises the routing update information of terminal in this RU message;
Step 102: source AN sends A16 session transfer request message to target AN, comprises the frequency point information of the channel of above-mentioned routing update information and the current use of AT in this session transfer request message;
Step 103: the A16 session transfer response message that source AN receiving target AN sends comprises the traffic channel resource information that target AN distributes as AT according to the frequency point information of above-mentioned routing update information and the current channel that uses of AT in this A16 session transfer response message.
By the method that the foregoing description one is described, the frequency point information of the channel that target AN can report according to AT is that AT distributes the corresponding business channel resource, has improved success rate for switching thus.
For making technical scheme of the present invention clearer, will be described technical scheme of the present invention by embodiment more specifically below.
Referring to Fig. 2, the method embodiment two of distribution service channel resource of the present invention is as follows:
Step 201:AT reports RU message to source AN, comprises the routing update information of terminal in this RU message.
When AT when AN edge, source moves to target AN, if AT detects the pilot signal strength of target AN when surpassing default thresholding, then report RU message to source AN, the routing update information that comprises terminal in this RU message, as the pilot frequency information of source AN and the pilot frequency information of the detected target AN of AT, the pilot frequency information of target AN can be the pilot signal strength of target AN, the pilot tone number of target AN etc.
Above-mentioned AT is when the edge of source AN moves to target AN, and the intensity that AT might detect the one or more pilot signals under the target AN surpasses default thresholding, so may comprise one or more pilot frequency informations of target AN in the RU message.
Step 202: after source AN receives the RU message that AT reports, send A16 session transfer request message, comprise the frequency point information of the channel of the routing update information of above-mentioned terminal and the current use of AT in this A16 session transfer request message to target AN.
Step 202 may further include: after source AN received the RU message that AT reports, source AN judged whether and need initiate to switch to target AN, if desired, then sends the A16 session transfer request to target AN, if do not need, does not then initiate to switch.Judge whether and need can be provided with flexibly to the condition that target AN initiate to switch, for example, when the difference of the pilot frequency intensity of target AN and the reference pilot intensity of source AN is then initiated to switch during greater than default thresholding, otherwise, do not initiate switching.
The frequency point information that comprises the channel of the current use of AT in the above-mentioned A16 session transfer request message, it can be by newly-increased IE (information element in original A16 transfer request message, information unit) realizes, for convenience of description, in an embodiment of the present invention this IE is called " current channel information " IE.
The structure of original A16 transfer request message is as shown in table 1:
Table 1
The structure of the A16 transfer request message behind newly-increased " current channel information " IE is as shown in table 2:
Table 2
The structure of " current channel information " IE is as shown in table 3:
Table 3
After step 203: target AN receives that source AN sends A16 session transfer request message, obtain the target pilot information of AT according to the frequency point information of the channel of routing update information in the A16 session transfer request message and the current use of AT, and distribute the corresponding business channel resource to AT.
In step 203, if there be the Traffic Channel identical with the frequency of the current use of AT in target AN down, then being preferably AT distributes this Traffic Channel; If there be not out of condition (as load is big, signal is more weak etc.) of Traffic Channel identical or the Traffic Channel identical under the target AN with the frequency of the current use of AT with the frequency of the current use of AT, then can be the frequency that AT distributes other a AT to report in RU message by default algorithm, and be that AT distributes the corresponding business channel resource according to this frequency.
Step 204: target AN sends A16 session transfer response message to source AN, comprises the traffic channel resource information that target AN distributes to AT in the message.
Step 205: source AN sends A16 session transfer to target AN and finishes message.
Step 206: source AN is that the traffic channel resource information that AT distributes is encapsulated in TCA (Traffic Channel Assignment, the Traffic Channel Assignment) message with target AN, is handed down to AT by eating dishes without rice or wine.
After step 207:AT receives TCA message, according to target AN in this TCA message is the traffic channel resource information that AT distributes, be linked into target AN, inserting successfully, the back sends TCC (Traffic Channel Assignment, Traffic Channel Assignment is finished) message to target AN.
After step 208: target AN receives the Traffic Channel Complete that AT sends, judge handover success, then initiate A16 resource dispose procedure to source AN.
The scheme that the foregoing description one is described has increased an IE who is used to carry the frequency point information of the current channel of AT newly at source AN in the A16 session transfer request message that target AN sends, by this IE the frequency point information of the channel of the current use of AT is sent to target AN, the frequency point information of the channel that target AN can report according to RU message and AT is an AT distribution service channel resource, has improved success rate for switching thus.
Referring to shown in Figure 3, the method embodiment three of distribution service channel resource of the present invention is as follows:
Step 301:AT reports RU message to source AN, comprises the routing update information of terminal in this RU message.
When AT when AN edge, source moves to target AN, if AT detects the pilot signal strength of target AN when surpassing default thresholding, then send RU message to source AN, the routing update information that comprises terminal in this RU message, as the pilot frequency information of source AN and the pilot frequency information of the detected target AN of AT, the pilot frequency information of target AN can be the pilot signal strength of target AN, the pilot tone number of target AN etc.
Above-mentioned AT is when the edge of source AN moves to target AN, and the intensity that AT might detect the one or more pilot signals under the target AN surpasses default thresholding, so may comprise one or more pilot frequency informations of target AN in the RU message.
Step 302: after source AN receives the RU message that AT reports, send A16 session transfer request message, comprise the frequency point information of the channel of the routing update information of above-mentioned terminal and the current use of AT in this A16 session transfer request message to target AN.
Step 302 may further include: after source AN received the RU message that AT reports, whether AN judgement in source needed to initiate to switch to target AN, if desired, then sends the A16 session transfer request to target AN, if do not need, did not then initiate to switch.Judge whether and need can be provided with flexibly to the condition that target AN initiate to switch, for example, when the difference of the pilot frequency intensity of target AN and the reference pilot intensity of source AN during greater than default thresholding then source AN initiate to switch to target AN, otherwise, do not initiate switching.
The frequency point information of frequency point information channel that comprises the channel of the current use of AT in the above-mentioned A16 session transfer request message, it can be realized by the frequency point information parameter type of a newly-increased current use channel of AT in the existing cell of original A16 transfer request message.For example, in " the session state information IE " of A16 session transfer request message, increase a session state information record, be used to carry the frequency point information of the current use channel of AT, for convenience of description, in an embodiment of the present invention this session state information record be called " current channel parameter ".
Existing session state information IE structure chart is as shown in table 4 below:
Table 4
The structure of " current channel parameter ", as shown in table 5 below, its " session state information record " part that is equivalent among the session state information IE has increased a session state information record.
Table 5
| Field | Field length (position) | Value |
| The form numbering | 8? | 0x0? |
| Reserved field | 1? | 0x0? |
| Protocol type | 7?or?15? | 0x000E? |
| Protocol subtypes | 16? | 0x0000? |
| Parameter type | 8? | 0x04? |
| Length | 8? | 4? |
| Channel | 24? | Current channel frequency |
After step 303: target AN receives that source AN sends the A16 session transfer request, obtain the target pilot information of AT according to the frequency point information of the channel of routing update information in the A16 session transfer request message and the current use of AT, and distribute the corresponding business channel resource to AT.
In step 303, if there be the Traffic Channel identical with the frequency of the current use of AT in target AN down, then being preferably AT distributes this Traffic Channel; If there be not out of condition (as load is big, signal is more weak etc.) of Traffic Channel identical or the Traffic Channel identical under the target AN with the frequency of the current use of AT with the frequency of the current use of AT, then can be the frequency that AT distributes other a AT to report in RU message by default algorithm, and be that AT distributes the corresponding business channel resource according to this frequency.
Step 304: target AN returns A16 session transfer response message to source AN, comprises the traffic channel resource information that target AN distributes to AT in the message.
Step 305: source AN sends A16 session transfer to target AN and finishes message.
Step 306: source AN is that the traffic channel resource information that AT distributes is encapsulated in the TCA message with target AN, is handed down to AT by eating dishes without rice or wine.
After step 307:AT receives TCA message, be the traffic channel resource information that AT distributes according to target AN in this TCA message, be linked into target AN, inserting successfully, the back sends TCC message to target AN.
After step 308: target AN receives the Traffic Channel Complete that AT sends, judge handover success, then initiate A16 resource dispose procedure to source AN.
The scheme that the foregoing description three is described is by a newly-increased parameter that is used to carry the frequency point information of the current channel of AT in the existing IE of A16 session transfer request message, the frequency point information of the channel of the current use of AT is sent to target AN, target AN can improve success rate for switching thus according to RU message and the current channel frequency point information of using of AT as AT distribution service channel resource.
Except said method embodiment, the present invention also provides a kind of network element, and referring to shown in Figure 4, this network element comprises:
The pilot signal strength that comprises target AN in the above-mentioned RU message.
First sending module 412 is used for sending A16 session Transfer Message to target AN after first receiver module 411 receives the RU message that terminal sends, and comprises the frequency point information of the channel of the routing update information of AT and the current use of AT in this A16 session Transfer Message.
Comprise in the A16 session Transfer Message the current use of described terminal channel frequency point information can for: A16 session transfer request message comprises a newly-increased information unit, is used to carry the frequency point information of the channel of the current use of AT; Or comprise a newly-increased session state information record in the A16 session transfer request message existing information unit, be used to carry the frequency point information of the channel of the current use of AT.
Except above-mentioned first receiver module 411, first sending module 412 and second receiver module 413, said network element can also comprise:
Said network element can be used as independent equipment, or is integrated in the access network as functional entity.
The present invention also provides another network element, and referring to shown in Figure 5, this network element comprises:
Above-mentioned distribution module 512 is specially for AT distribution service channel resource: if there be the Traffic Channel identical with the frequency of the current use of AT down in this network element, then being preferably AT distributes this Traffic Channel; If there be not out of condition (as load is big, signal is more weak etc.) of Traffic Channel identical or the Traffic Channel identical under this network element with the frequency of the current use of AT with the frequency of the current use of AT, then can be the frequency that AT distributes other a AT to report in RU message by default algorithm, and be that AT distributes the corresponding business channel resource according to this frequency.
Sending module 513 is used for sending A16 session transfer response message to source AN, and this A16 session transfer response message comprises above-mentioned traffic channel resource information for the AT distribution.
Said network element can be used as independent equipment, or is integrated in the access network as functional entity.
The all or part of step that one of ordinary skill in the art will appreciate that the execution of realization said method embodiment or network element can instruct relevant hardware to finish by program.
By the technical scheme that the invention described above provides, target AN can come the distribution service channel according to the RU message of terminal to report and the frequency point information of current channel, has avoided target AN to cause the problem of handoff failure at random the terminal distribution Traffic Channel.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the method for a distribution service channel resource is characterized in that, described method comprises:
The source access network receives the routing update message to terminal, comprises the routing update information of described terminal in the described routing update message;
The source access network sends A16 session transfer request message to target access network, comprises the frequency point information of the channel of described routing update information and the current use of described terminal in the described A16 session transfer request message;
The source access network receives the A16 session transfer response message that described target access network sends, and comprises in the described A16 session transfer response message that described target access network is the traffic channel resource information of described terminal distribution according to the frequency point information of the channel of described routing update information and the current use of described terminal.
2. method according to claim 1, it is characterized in that, the source access network further comprised before described target access network sends A16 session transfer request message: the source access network judges whether and need initiate to switch to target access network, then sends A16 session transfer request message to described target access network if desired.
3. method according to claim 1 is characterized in that, the source access network further comprises after receiving the A16 session transfer response message that described target access network sends: send the A16 session to described target access network and shift and finish message.
4. method according to claim 1, it is characterized in that the source access network further comprises after receiving the A16 session transfer response message that described target access network sends: the source access network is that the traffic channel resource information of described terminal distribution sends to described terminal with described target access network.
5. method according to claim 1, it is characterized in that, the frequency point information that comprises the channel of the current use of described terminal in the described A16 session transfer request message is specially: increase an information unit in A16 session transfer request message, be used to carry the frequency point information of the channel of the current use of AT; Or
Newly-increased parameter type in A16 session transfer request message existing information unit is used to carry the frequency point information of the channel of the current use of AT.
6. the method for a distribution service channel resource is characterized in that, described method comprises:
The A16 session transfer request message that target access network reception sources access network sends comprises the frequency point information of the channel of the routing update information of terminal and the current use of described terminal in the described A16 session transfer request message;
Target access network is obtained the target pilot information of described terminal according to the frequency point information of the channel of routing update information in the described A16 session transfer request message and the current use of described terminal, and gives described terminal distribution corresponding business channel resource.
Target access network sends A16 session transfer response message to described source access network, comprises in the described A16 session transfer response message that described target access network is the traffic channel resource information of described terminal distribution.
7. method according to claim 6 is characterized in that, for described terminal distribution corresponding business channel resource specifically comprises:
Be preferably the identical Traffic Channel of frequency of described terminal distribution and the current use of described terminal.
8. a network element is characterized in that, described network element comprises:
First receiver module is used for the routing update message that receiving terminal sends, and comprises the routing update information of terminal in the described routing update message.
First sending module, be used for after described first receiver module receives the routing update message of described terminal transmission, send A16 session Transfer Message to target access network, comprise the frequency point information of the channel of described routing update information and the current use of described terminal in this A16 session Transfer Message.
Second receiver module, be used to receive the extremely A16 session transfer response message of described target access network, comprise in this A16 session transfer response message that described target access network is the traffic channel resource information of described terminal distribution according to the frequency point information of the channel of described routing update information and the current use of described terminal.
9. network element according to claim 8 is characterized in that, described network element also comprises:
Second sending module is used for sending Traffic Channel Assignment message to described terminal, comprises in this Traffic Channel Assignment message that described target access network is the traffic channel resource information of described terminal distribution.
10. according to Claim 8 or 9 described network elements, it is characterized in that described network element is independent equipment, or be integrated in the access network as functional entity.
11. a network element is characterized in that, described network element comprises:
Receiver module is used to receive the A16 session transfer request message of coming to the source access network, comprises the frequency point information of the channel of the routing update information of terminal and the current use of terminal in this A16 session transfer request message;
Distribution module is used for obtaining according to the frequency point information of the channel of described routing update information and the current use of described terminal the target pilot information of described terminal, and gives described terminal distribution corresponding business channel resource;
Sending module is used for sending A16 session transfer response message to the source access network, and this A16 session transfer response message comprises that described distribution module is the traffic channel resource information of described terminal distribution.
12. network element according to claim 11 is characterized in that, described network element is independent equipment, or is integrated in the access network as functional entity.
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| CN2009101060329A CN101505511B (en) | 2009-03-10 | 2009-03-10 | Method and network element for allocating service channel resource |
| PCT/CN2010/070800 WO2010102538A1 (en) | 2009-03-10 | 2010-02-27 | Method and network element for allocating traffic channel resources |
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| CN101137215B (en) * | 2007-01-16 | 2010-05-19 | 中兴通讯股份有限公司 | Method for supporting mobile terminal to move between base stations with diversity of protocol versions |
| CN101505511B (en) * | 2009-03-10 | 2011-03-30 | 华为技术有限公司 | Method and network element for allocating service channel resource |
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