CN101364913B - Method for network access by wireless terminal - Google Patents
Method for network access by wireless terminal Download PDFInfo
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- CN101364913B CN101364913B CN2007101435392A CN200710143539A CN101364913B CN 101364913 B CN101364913 B CN 101364913B CN 2007101435392 A CN2007101435392 A CN 2007101435392A CN 200710143539 A CN200710143539 A CN 200710143539A CN 101364913 B CN101364913 B CN 101364913B
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Abstract
The invention discloses a method for accessing a wireless terminal in the network after the terminal accurately acquires a system parameter transmitted from a system side. The method is mainly characterized in that the method comprises the following steps: storing an acquired parameter change mark Count1 and a system parameter information corresponding to Count1 when the terminal is accessed to the network, wherein Counts has an effective duration and the Count1 is valid if the Count1 storage time does not exceed the effective duration; and acquiring a parameter change mark Count2 when the terminal is re-accessed in the network, accessing the network by using the system parameter information corresponding to Count1 if the Count1 is valid and is matched with Count2, otherwise, acquiring the system parameter information corresponding to Count2, and accessing the network according to the system parameter information corresponding to Count2. The method can ensure the terminal to acquire accurate system parameters, thereby shortening the network access time of the terminal.
Description
Technical field
The present invention relates to wireless communication technology field, specifically, relate to a kind of method of network access by wireless terminal.
Background technology
In current wireless system, have a large amount of wireless parameter configuration informations to send aloft, in order to save power consumption of terminal, optimize these configuration parameter transmission, utilize " parameter configuration sign " to carry out matching judgment, be adopt very general method.
But there is a very big problem in this matching way, if be exactly parameter configuration sign through the cycle samsara again repeated using the value of terminal record, though variation has taken place in the actual content of system parameter message, it is former configuration parameter that but terminal still can be thought, still the configuration parameter that oneself writes down before adopting to carry out alternately with wireless network, causes the subsequent operation failure.
With the WiMAX system is example, DCD (the Downlink Channel Descriptor that cycle sends, down channel is described) message definition the physical channel characteristics of down link, and DL-MAP (DownlinkDL-MAP, downlink map) the DCD Count in the message (parameter change sign) promptly is used for indicating corresponding DCD message, when any characteristic of channel value changed in the DCD message, DCD Count will correspondingly add 1, and was to progressively increase in a samsara cycle with 256.So terminal is being received DL-MAP message, only need to judge DCD Count and previous whether equating of preserving, if equate, illustrate that then DCD message does not change, just the physical channel characteristics of down link does not change, can continue to use the relevant physical parameter access network of previous reservation, save terminal resource.If unequal, illustrate that DCD message changes, need obtain DCD message again, use the physical parameter access network of the new down link that obtains.
But there is a problem like this, if DCD Count equates with the previous value that keeps of terminal just through the cycle samsara exactly, though the physical channel characteristics of actual down link changes, but terminal can be because DCD Count value and previous equating of preserving, can think not change, still can use the relevant physical parameter access network of previous preservation, but at this moment can access failure, and insert again, cause the time of accessing terminal to network longer.
Summary of the invention
Technical problem to be solved by this invention is the method that is to provide a kind of network access by wireless terminal, to be linked into network after the system parameters of correctly obtaining the system side transmission.
In order to solve the problems of the technologies described above, the invention provides a kind of method of network access by wireless terminal, comprise following content:
(a) during the previous access network of wireless terminal, parameter change sign Count1 and the system parameter message corresponding that preservation is obtained with Count1, the corresponding effective duration of described Count1 does not surpass this effective duration if preserve the time of described Count1, and then described Count1 is effective;
(b) described wireless terminal enters network once more, obtain this parameter change sign Count2, if described Count1 is effective and Count2 and Count1 coupling, then use the system parameter message access network corresponding with Count1, otherwise obtain the system parameter message corresponding with Count2, and, finish according to this system parameter message access network corresponding with Count2.
In the said method, after described wireless terminal obtains system parameter message and access network corresponding with Count2, can be further with the pairing system parameter message of described Count2 as preserving corresponding to the system parameter message of new Count1; And described Count2 can be preserved as new Count1, perhaps the pairing system parameter message sign of described Count2 can be preserved as the pairing system parameter message sign of new Count1.
In the said method, described effective duration can be when described wireless terminal dispatches from the factory or networks default setting.
In the said method, described effective duration can send to described wireless terminal by message by described network.Further, described wireless terminal during access network, can also save as the effective duration that obtains the effective duration corresponding to new Count1 once more.
In the said method, described effective duration can be adjusted or change.
In the said method, whether the time of preserving described Count1 surpass described effective duration can be to determine by a timer, this length of timer is effective duration of Count1, when the Count1 that preservation is obtained, pick up counting, timer expiry as described, described wireless terminal then can be removed described Count1 and the system parameter message corresponding with Count1, and stops described timer; Described wireless terminal enters network once more, when obtaining described Count2, removes as the Count1 that preserves, and can judge that then the time of preserving described Count1 has surpassed described effective duration.
In the said method, whether the time of preserving described Count1 surpasses described effective duration, can determine with the difference of the moment t2 of access network once more by the moment t1 of the previous access network of described wireless terminal, if the difference of t2 and t1 can judge then that greater than described effective duration the time of preserving described Count1 is above described effective duration during access network once more.
Further, described t1 can comprise that described wireless terminal preserves the moment of described Count1 and the system parameter message corresponding with Count1, or receives the moment of the message that comprises described Count1; Described t2 can comprise that described wireless terminal obtains the moment of described Count2, or receives the moment of the message that comprises described Count2.
In the said method, described Count2 and described Count1 coupling can comprise that described Count2 equates with described Count1.
Compared with prior art, the inventive method identifies the judgement that identified with former parameter information by strengthening to current parameter information, optimizes the control flow of wireless system, and then realizes purpose of the present invention.The present invention has the following advantages:
1) guaranteed that terminal obtains system parameters accurately;
2) accelerate time of accessing terminal to network, improved access efficiency.
Description of drawings
Fig. 1 is the inventive method embodiment step schematic diagram;
Fig. 2 is the step schematic diagram of first Application Example of the inventive method;
Fig. 3 is the step schematic diagram of second Application Example of the inventive method;
Fig. 4 is the step schematic diagram of the 3rd Application Example of the inventive method;
Fig. 5 is the step schematic diagram of the 4th Application Example of the inventive method.
Embodiment
Below in conjunction with accompanying drawing and the present invention is described in further detail.
After thinking of the present invention is the previous access network of wireless terminal, for the parameter change of being preserved identifies Count1 and with the corresponding system parameter message of Count1 the term of validity is set; Terminal is obtained this parameter change sign Count2 once more during access network, if Count1 that is preserved and corresponding system parameter message are still effective, just decides the mode of access network according to the match condition of Count2 and Count1; Otherwise just according to the corresponding system parameter message access network of Count2.For this reason, for the Count1 that preserved and corresponding system parameter message are provided with an effective duration K,, just think that the system parameter message of the Count1 that preserved and correspondence is effective, otherwise just think invalid if within effective duration K.This effective duration K also can obtain when terminal is obtained Count1 in the lump.
Such as in the WiMAX system, wireless terminal is formerly during access network, obtain and preserve DCD Count in the DL-MAP message (being above-mentioned Count1) and corresponding system parameter message, obtain simultaneously and preserve effective duration K, corresponding Count1 and corresponding system parameter message; When wireless terminal enters network once more, after receiving DL-MAP message and obtaining wherein DCD Count (being above-mentioned Count2), if Count1 is still in effective duration K, and Count2 and Count1 coupling, terminal is just used previous that preserve and the corresponding system parameter message access network of Count1, otherwise just obtain with the corresponding system parameter message of Count2 after access network again.
The scope of application of the present invention is whole wireless communication field, and the parameter change sign Count in the different communication systems may be different, but its effect all is the same, all is to represent to terminal whether the configuration parameter of system side change has taken place by Count.Particularly, the DCDCount in the WiMAX system, UCD Count as mentioned above, the Configuration Change Count in the MOB_NBR_ADV message, or NSP Change Count etc.; Sector Signature in the CDMA 2000HRPD system for another example, or the like.
Whether above-mentioned Count2 and Count1 mate, and are whether Count2 equates with Count1 in the WiMAX system, in other system, also can be after Count2 operates through calculate or conversion etc., to compare with Count1 again, see whether mate.As Pilot Strength Measurement Message among the CDMA2000 with PN (Pseudo Noise, pseudo noise) phase place, be through after calculating, the PN that preserves with terminal compares again, judges whether to be complementary.
Between the different parameter change sign, can corresponding identical effective duration, also can corresponding different effective durations, specifically can be provided with as required and adjust.And effective duration K of above-mentioned parameter change sign, can adopt the mode of default configuration default in terminal, also can adopt message to send to terminal by wireless network.Wherein the predetermined manner of default configuration comprises that terminal carries and default setting or terminal are write and default setting by operator when networking when dispatching from the factory, wherein adopt message to send to terminal by wireless network, as in the WiMAX system, adopting DL-MAP message, DCD message, also can adopt other message in addition to send to terminal.
Whether parameter change sign Count1 and corresponding system parameter message thereof that terminal is preserved be effective, can adopt following two kinds of judgment modes:
(1) terminal had before been preserved Count1 and during with the corresponding system parameter message of Count1, according to the effective duration K that obtains one timer Timer is set, the duration of this timer Timer is K, if terminal when access network obtains Count2 once more this Timer overtime, illustrate that then the previous Count1 that preserves of terminal is invalid, otherwise be effective;
(2) moment of the previous access network of terminal saves as t1 constantly, and the moment of access network is designated as t2 to terminal once more, calculate the difference of t2 and t1, if this difference illustrates that then the previous Count1 that preserves of terminal is invalid, otherwise is effective greater than the effective duration K that obtains simultaneously with Count1.
Above-mentioned (1) kind situation is referred to as to adopt the timer timing to carry out Count1 validity judgment mode, and in this case, if timer Timer is overtime, then terminal is removed Count1 and corresponding system parameter message automatically, and stops timer Timer.When wireless terminal enters network once more, find the not previous system parameter message of preservation, just enter into the invalid flow process of Count1.
In above-mentioned (2) the kind situation, be referred to as to adopt recorded and stored to carry out Count1 validity judgment mode constantly, in this case, if the time difference of t2 and t1, determines so that Count1 is invalid, also enters into the invalid flow process of Count1 greater than effective duration K.
Moment t1 can be the moment of preserving Count1 and corresponding system parameter message in above-mentioned (2) the kind situation, also can be the moment that terminal receives the message that comprises Count1, such as adopting DL-MAP message etc. in the WiMAX system.Similarly, t2 can obtain the moment of Count2 for terminal, also can be the moment that terminal receives the DL-MAP message that comprises Count2 in the WiMAX system.
The invalid flow process of above-mentioned Count1, after also promptly definite Count1 was invalid, terminal need be obtained the corresponding system parameter message with Count2 from system side according to Count2, then according to the system parameter message access network that obtains.
Fig. 1 shows the step of the inventive method embodiment, comprising:
During access network, getting parms changes after the sign Count2 once more for step 102, wireless terminal, whether also effectively judges Count1, if effectively then change step 103, otherwise commentaries on classics step 105;
Above-mentioned steps 105 comprises that further terminal is preserved the Count2 relevant information as new Count1 relevant information, uses for follow-up access.Wherein terminal is preserved the Count2 relevant information as new Count1 relevant information, comprise terminal with the pairing system parameter message of Count2 as preserving corresponding to the system parameter message of new Count1; And Count2 is preserved as new Count1, perhaps with the sign of the employed system parameter message of current access network, also be the pairing system parameter message sign of Count2, preserve as the pairing system parameter message sign of new Count1.Such as in the WiMAX system, can be that Count2 is preserved as new Count1.
Judge Count1 situation corresponding to adopting timer to carry out timing whether effectively, also further restarting duration is the timer Timer of K, uses for follow-up access.Corresponding to adopting recorded and stored to carry out the situation that validity is judged constantly, also can be with t2 as the t1 preservation constantly of new record.In addition, if terminal when obtaining Count2, has also been obtained new effective duration K ', terminal also needs K ' is saved as effective duration K of new Count1 so, and K ' wherein can equate with K, also can not wait.
When wireless terminal inserted once more later on, all the flow process of 102～step 105 was carried out set by step.
Below be concrete application scenarios of the present invention with the WiMAX system, describe specific implementation of the present invention in detail by four Application Examples.Certainly, the present invention is not limited to the WiMAX system, but is applicable to whole wireless communication field.Fig. 2 shows first Application Example of the present invention, effective duration K default setting already when terminal is dispatched from the factory, and, specifically comprise step by the state that timer Timer judges Count1 is set:
When step 202, terminal receive new DL-MAP message, at first therefrom obtain new DCDCount (also being above-mentioned Count2), and judge whether also to preserve the record of Count1, if end side is also preserved the record of Count1, then execution in step 203, otherwise execution in step 205;
Fig. 3 shows second Application Example of the present invention, and effectively duration K is write and be made as acquiescence by operator when terminal networks, but the state of judgement Count1 undertakies by moment t2 and t1 difference, specifically comprises step:
Fig. 4 shows the 3rd Application Example of the present invention, and effectively duration K sends to terminal by DL-MAP message with Count1 by system, and by the state that timer Timer judges Count1 is set, specifically comprises step:
Step 401 is during network access by wireless terminal, according to the DL-MAP message that receives, obtain DCD Count (being above-mentioned Count1) and obtain corresponding D CD relevant information, preserve, preserve the effective duration K of Count1 in the DL-MAP message simultaneously, starting duration is the timer Timer of K; If timer Timer is overtime in subsequent process, terminal is just automatically with the Count1 that is preserved, and removings such as corresponding effective duration K, DCD relevant information, and stops timer Timer;
Step 404, the related physical channel parameter access network of the previous corresponding Count1 that preserves of terminal utilization finishes;
Fig. 5 shows the 4th Application Example of the present invention, and effectively duration K sends to terminal by system by DCD message, and judges that the state of Count1 is to be undertaken by the difference of moment t2 and t1, specifically comprises step:
Step 501, during network access by wireless terminal, according to the DL-MAP message that receives, obtain DCD Count (being above-mentioned Count1) and obtain corresponding D CD relevant information, preserve, obtain and preserve duration K corresponding to Count1 according to DCD message, the moment that also will preserve Count1 and corresponding D CD relevant information saves as t1 (in the middle of other Application Example, also can select to save as time of reception with this DL-MAP message t1);
Step 502, terminal are therefrom obtained Count2 when access network receives DL-MAP message once more, and the moment of obtaining Count2 is designated as t2 (in the middle of other Application Example, also can select to be designated as time of reception with this DL-MAP message t2);
Step 503, the difference of terminal judges t2 twice time of reception and t1 and the effective magnitude relationship of duration K, if the difference of t2 and t1 smaller or equal to effective duration K, then execution in step 504; Otherwise execution in step 506;
Step 504, terminal judge further whether Count2 equates with Count1, if equate then execution in step 505, otherwise execution in step 506;
Step 505, the related physical channel parameter access network of the previous corresponding Count1 that preserves of terminal utilization finishes;
Step 506, terminal are obtained the pairing DCD message of Count2, obtain effective duration K ', and utilize the physical channel parameters access network in the DCD message.Simultaneously, terminal saves as new Count1 with Count2, the pairing physical channel parameters of Count2 is saved as physical channel parameters corresponding to new Count1, K ' is saved as new duration K, t2 is saved as new t1, wherein effectively duration K ' and before effective duration K different (certain, in the middle of other Application Examples, K ' and K also can be identical).
Should be to adopt DCD message to send effective duration information with embodiment, in the middle of other Application Examples of the present invention, also can adopt other message.
The inventive method is owing to the parameter change sign that terminal is preserved has been carried out certain setting, allow information such as its corresponding physical channel parameter in the certain hour length range effectively, if whether the parameter change sign is identical with the parameter change sign of terminal preservation before in the DL-MAP message that surpasses this duration then no matter newly receive, terminal all needs to obtain from system side again information such as physical channel parameters, so just guaranteed the actual content difference but parameter identification when identical, still can obtain physical channel parameters accurately, and avoided prior art in this case directly to enter the follow-up flow process of access network failure, reduce the time of accessing terminal to network, improved access efficiency.
Claims (10)
1. the method for a network access by wireless terminal comprises following content:
(a) during the previous access network of wireless terminal, parameter change sign Count1 and the system parameter message corresponding that preservation is obtained with Count1, the corresponding effective duration of described Count1 does not surpass this effective duration if preserve the time of described Count1, and then described Count1 is effective;
(b) described wireless terminal enters network once more, obtain this parameter change sign Count2, if described Count1 is effective and Count2 and Count1 coupling, then use the system parameter message access network corresponding with Count1, otherwise obtain the system parameter message corresponding with Count2, and, finish according to this system parameter message access network corresponding with Count2.
2. the method for claim 1 is characterized in that:
After described wireless terminal obtains system parameter message and access network corresponding with Count2, further with the pairing system parameter message of described Count2 as preserving corresponding to the system parameter message of new Count1; And described Count2 preserved as new Count1, perhaps with the pairing system parameter message sign of described Count2, preserve as the pairing system parameter message sign of new Count1.
3. the method for claim 1 is characterized in that:
Described effective duration default setting when described wireless terminal dispatches from the factory or networks.
4. the method for claim 1 is characterized in that:
Described effective duration sends to described wireless terminal by described network by message.
5. method as claimed in claim 4 is characterized in that:
During access network, effective duration that also will obtain saves as the effective duration corresponding to new Count1 to described wireless terminal once more.
6. the method for claim 1 is characterized in that:
Described effective duration can be adjusted or change.
7. the method for claim 1 is characterized in that:
Whether the time of preserving described Count1 surpass described effective duration is to determine by a timer, this length of timer is effective duration of Count1, when the Count1 that preservation is obtained, pick up counting, timer expiry as described, described wireless terminal is then removed described Count1 and the system parameter message corresponding with Count1, and stops described timer; Described wireless terminal enters network once more, when obtaining described Count2, removes as the Count1 that preserves, and judges that then the time of preserving described Count1 has surpassed described effective duration.
8. the method for claim 1 is characterized in that:
Whether the time of preserving described Count1 surpasses described effective duration, determine with the difference of the moment t2 of access network once more by the moment t1 of the previous access network of described wireless terminal, if the difference of t2 and t1 judges then that greater than described effective duration the time of preserving described Count1 is above described effective duration during access network once more.
9. method as claimed in claim 8 is characterized in that:
Described t1 comprises that described wireless terminal preserves the moment of described Count1 and the system parameter message corresponding with Count1, or receives the moment of the message that comprises described Count1; Described t2 comprises that described wireless terminal obtains the moment of described Count2, or receives the moment of the message that comprises described Count2.
10. the method for claim 1 is characterized in that:
Described Count2 and described Count1 coupling comprise that described Count2 equates with described Count1.
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| CN2007101435392A CN101364913B (en) | 2007-08-07 | 2007-08-07 | Method for network access by wireless terminal |
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| CN102387604B (en) * | 2010-08-30 | 2014-04-30 | 鸿富锦精密工业（深圳）有限公司 | Client device and method for recovering network connection thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1802013A (en) * | 2005-07-01 | 2006-07-12 | 华为技术有限公司 | Method and apparatus for realizing network service provider discovery |
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| CN1802013A (en) * | 2005-07-01 | 2006-07-12 | 华为技术有限公司 | Method and apparatus for realizing network service provider discovery |
Non-Patent Citations (2)
| Title |
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| Feng Xie, et al..Steady-State Analysis of a Split-Connection Scheme for Internet Access Through a Wireless Terminal.《IEEE/ACM TRANSACTIONS ON NETWORKING》.2004,第12卷(第3期),515-525. * |
| IEEE.Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems.《IEEE Standard for Local and metropolitan area networks》.2006,24-123. * |
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