CN101730163B - Associated scanning method for WiMaX system and device therefor - Google Patents
Associated scanning method for WiMaX system and device therefor Download PDFInfo
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- CN101730163B CN101730163B CN200810174674A CN200810174674A CN101730163B CN 101730163 B CN101730163 B CN 101730163B CN 200810174674 A CN200810174674 A CN 200810174674A CN 200810174674 A CN200810174674 A CN 200810174674A CN 101730163 B CN101730163 B CN 101730163B
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Abstract
The invention discloses an associated scanning method for a WiMaX system and a device therefore; wherein the method comprises the following steps: a mobile station transmits CDMA code to one adjacent base station in an adjacent base station aggregate, so as to initiate the association with the adjacent base station; within a presetting time bucket after the mobile station transmits CDMA code to the adjacent base station, a distance measurement response message from the adjacent base station can not be received, or under the condition that the distance measurement response message which is in a continued state is received, within the associated time of the adjacent base station, the mobile station retransmits the CDMA code to the adjacent base station; by adopting the invention, the probability of associated succeed of MS and the adjacent BS can be increased.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of related scan method and device that is used for micro-wave access to global intercommunication (Worldwide Interoperability for Microwave Access abbreviates WiMAX as) system.
Background technology
Because the WiMAX system need support user's mobility, so in the IEEE802.16e standard, comprised operations such as cell selecting, switching.
Travelling carriage (Mobile Station abbreviates MS as) is through receiving signal from adjacent base station (BaseStation abbreviates BS as), and measure channel quality is so that search is used to switch only base station.This process is called scanning.In sweep spacing, if think that certain neighbor bss is suitable, MS just can find range with this neighbor bss, obtains and write down ranging parameters and useful business information, in order to select switching target, or distance measurement value is set during actual in the future the switching, reduces handover delay.This second process is called association.
Cell selecting is meant MS scanning and/or related one or more BS, and it is suitable for switching target to determine whether according to its performance.According to the 802.16e standard, the process of cell selecting is following:
1, the Current Serving BTS of MS (Serving Base Station the abbreviates SBS as) cycle to MS broadcasting neighbours' notification messages (MOB_NBR-ADV), this message carries the channel information of neighbor bss.
2, MS sends scan request message (MOB_SCN-REQ) according to the information that obtains to SBS.SBS sends scanning response (MOB_SCN-RSP) message and confirms.MOB_SCN-REQ/RSP message carries the neighbor bss tabulation and the scan type of scanning start frame, sweep spacing, scanning repetition, data interaction interval, scanning.
If scan type is 0b010 or 0b011, receive MOB_SCN-REQ so after, SBS will coordinate association process with the neighbor bss of request.Each neighbor bss distributes related ranging parameters for this MS: vertical shift (rendezvous time), CDMA sign indicating number (CDMA code) and send opportunity skew (Transmission Opportunity Offset).SBS coordinates, and guarantees that the ranging region that distributes can not repeat with too near, and through MOB_SCN-RSP message these related ranging parameters is provided.
Make an explanation in the face of related ranging parameters noun down:
Rendezvous time is meant the frame at uplink resource allocation figure (UL-MAP) the message place that comprises the special ranging zone that BS will send.The unit of rendezvous time is a frame, and the starting position is the frame at ranging response message place.Be meant the time between the frame of rendezvous time appointment of frame and next neighbor bss of rendezvous time appointment of this neighbor bss the correlation time of each neighbor bss.
Transmission opportunity offset is the slot offset number of span special ranging zone original position.The special ranging zone by special ranging indication bit (dedicatedranging indicator bit) be 1, ascending resource call number (UIUC) is that 12 uplink resource allocation figure information element (UL-MAP IE) is specified.
CDMA code concentrates from the initial ranging sign indicating number and chooses for specifying the ranging code of using for this MS.
3, after MS received MOB_SCN-RSP, according to scan type, MS and neighbor bss were carried out dissimilar scanning.
If scan type is 0b001, MS carries out the related scanning of rank 0 (level 0) with neighbor bss: MS and neighbor bss carry out initial ranging.
If scan type is 0b010, MS carries out the related scanning of rank 1 (level 1) with neighbor bss: MS and neighbor bss carry out special ranging.Related ranging parameters is also referred to as the special ranging parameter, is provided by MOB_SCN-RSP message.
MS uses above-mentioned related ranging parameters, and to carry out the related process of level 1 following with neighbor bss:
1, MS resolves the UL-MAP immediately following first frame after rendezvous time, obtains the special ranging zone, in this zone, confirms sending time slots according to transmission opportunity offset, sends CDMA code.If dedicated ranging indicatorbit is 0, then MS sends CDMA code at common ranging region.
If MS can not detect UL-MAP immediately following first frame after rendezvous time, MS will stop level 1 association process.Afterwards, MS is related with this BS execution level0.
If 2 timers (T3) are overtime and in the correlation time of neighbor bss, do not receive ranging response message (RNG-RSP), MS stops and this neighbor bss related, begins related next neighbor bss.Wherein T3 is the time of waiting for ranging response message after the transmission distance measurement request message.
If 3 receive RNG-RSP message in the correlation time of neighbor bss, then carry the needed physical deflection of MS (PHY offset), grade of service estimation (Service Level Prediction abbreviates SLP as) among the RNG-RSP.If SLP=2, MS can be in local contingency table be designated this BS related, the information among the record RNG-RSP, an and existence timer ASC-AGING-TIMER is set for associations.If this timer expiry, this associations is deleted.MS begins related next neighbor bss.
If 4 receive that in the correlation time of neighbor bss state is " termination " RNG-RSP (status=Abort), then MS termination and this neighbor bss is related, begins related next neighbor bss.
MS and SBS select suitable switching TBS according to scanning results associated and other performances.Re-access to the network of TBS in order to accelerate MS, SBS and TBS consult to be used to send distance measurement request message (RNG-REQ) for non-competing ranging opportunity of MS distribution.If the related ranging parameters information of the TBS of MS record is effective, the information setting physical layer parameter of the direct service recorder of MS is accelerated ranging process.
There is following problem in existing level1 association process:
If timer T3 is overtime and in the correlation time of neighbor bss, do not receive RNG-RSP, possibly be that transmitted power owing to MS is provided with the improper neighbor bss that causes and can't receives that CDMA code causes.At this moment, MS stops related with this neighbor bss, continues related next neighbor bss, in this case, might cause the related failure of optimum neighbor bss as TBS; Simultaneously, same related failure problem also possibly appear in other neighbor bss in the neighbor bss tabulation, and finally causes whole association process failure.
Secondly, be " continuations " RNG-RSP (status=Continue) if MS receives state, according to existing scheme, MS will stop related with this neighbor bss, and MS writes down the information among the RNG-RSP.In this case, the ranging parameters of MS record has not necessarily been adjusted to optimum state.When reality is switched, not that the parameter of optimum state is sent RNG-REQ message if MS uses these, cause RNG-REQ to send failure probably, and MS restart to carry out the process of range finding and will increase handover delay.
Improperly cause related failure and use unreasonable parameter to switch the problem that causes increasing handover delay owing to transmitted power is provided with to above-mentioned, do not provide effective solution in the correlation technique as yet.
Summary of the invention
The present invention aims to provide the related scan method and the device of a kind of WiMAX of being used for system, to solve in the correlation technique because transmitted power is provided with the problem that the improper association that causes is failed.
The related scan method of a kind of WiMAX of being used for system is provided according to an aspect of the present invention.
Related scan method according to the present invention comprises: travelling carriage sends the CDMA sign indicating number through an adjacent base station in adjacent base station set and initiates related with adjacent base station; Under the ranging response message or the situation of the state of receiving for the ranging response message of continuation that do not receive in the predetermined amount of time of travelling carriage after adjacent base station sends the CDMA sign indicating number from adjacent base station, travelling carriage resends the CDMA sign indicating number to adjacent base station in the correlation time of adjacent base station.
Preferably; Do not receive under the situation from the ranging response message of said adjacent base station at said travelling carriage; Travelling carriage is specially to the processing that adjacent base station resends the CDMA sign indicating number: travelling carriage is adjusted its transmission power level, and resends the CDMA sign indicating number with the regulated transmission power grade to adjacent base station.
Preferably, travelling carriage to the processing that adjacent base station resends the CDMA sign indicating number further is: the send opportunity skew time slot in the special ranging zone of travelling carriage in next frame resends the CDMA sign indicating number with the regulated transmission power grade to adjacent base station.
Preferably; Before carrying out the resending of CDMA sign indicating number; This method also comprises: surpass under the situation of predetermined special ranging number of retries resending behind the travelling carriage continuation execution adjustment transmission power level at the number of times of travelling carriage to the CDMA sign indicating number that adjacent base station sends; Surpass under the situation of special ranging number of retries at the number of times of travelling carriage to the CDMA sign indicating number of base station transmission, travelling carriage stops the emitting power grade adjustment, and stops to resend the CDMA sign indicating number.
Preferably; Receive under the situation of state from said adjacent base station at said travelling carriage for the ranging response message of continuation; Travelling carriage is specially to the processing that adjacent base station resends the CDMA sign indicating number: travelling carriage is according to the parameter adjustment local parameter that carries in the ranging response message, and uses adjusted parameter to resend the CDMA sign indicating number at the send opportunity skew time slot in the special ranging zone of the vertical shift appointment of being carried by ranging response message to adjacent base station.
Preferably, the skew of CDMA sign indicating number and send opportunity is distributed travelling carriage by adjacent base station in advance.And preferably, adjacent base station is preserved the preset time period with CDMA sign indicating number and send opportunity skew.
The related scanning means of a kind of WiMAX of being used for system also is provided according to a further aspect in the invention.
Related scanning means according to the present invention is arranged at travelling carriage, and it specifically comprises: relating module is used for sending the CDMA sign indicating number through an adjacent base station to adjacent base station set and initiates related with adjacent base station; Sending module; Be used under the ranging response message or the situation of the state of receiving that do not receive in the predetermined amount of time of relating module after adjacent base station sends the CDMA sign indicating number from adjacent base station, in the correlation time of adjacent base station, resending the CDMA sign indicating number to adjacent base station for the ranging response message of continuation.
Preferably; Sending module specifically comprises: first sends submodule; Be used under situation about not receiving in the predetermined amount of time of relating module after adjacent base station sends the CDMA sign indicating number from the ranging response message of adjacent base station; The power grade of CDMA sign indicating number is sent in adjustment, and resends the CDMA sign indicating number with the regulated transmission power grade to adjacent base station; Second sends submodule; Be used under the situation of state that receives in the predetermined amount of time of travelling carriage after adjacent base station sends the CDMA sign indicating number from adjacent base station, use the send opportunity skew time slot of local parameter in the special ranging zone of vertical shift appointment of adjustment to resend the CDMA sign indicating number to adjacent base station for the ranging response message of continuation.
By means of technique scheme of the present invention; Through making MS proceed special ranging, can effectively increase the related probability of successful of MS, thereby help to select only neighbor bss as TBS with neighbor bss; Improve service quality, help the optimization of Internet resources.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the related scan method of the inventive method embodiment
Fig. 2 is the flow chart according to the preferred process scheme of the related scan method of the inventive method embodiment;
Fig. 3 be according in the related scan method of the inventive method embodiment by the signaling process figure of the related scan process of Mobile Originated level1;
Fig. 4 is the signaling process figure according to the related scan process of the level1 that is initiated by the base station in the related scan method of the inventive method embodiment;
Fig. 5 is the block diagram according to the related scanning means of apparatus of the present invention embodiment;
Fig. 6 is the block diagram according to the preferred structure of the related scanning means of apparatus of the present invention embodiment.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Functional overview
Main thought of the present invention is: when MS and neighbor bss scan; If MS initiate with a certain neighbor bss related after predetermined amount of time after (timer T3 is overtime) MS do not receive RNG-RSP; Then do not stop the association process of MS and this neighbor bss; But adjust its transmission power level, and resend the CDMA sign indicating number to BS with adjusted power.In addition, be the RNG-RSP that continues if MS receives state in the correlation time of neighbor bss, then MS adjusts local parameter, and uses adjusted parameter to resend the CDMA sign indicating number to BS.To describe technical scheme of the present invention in detail below.
Method embodiment
According to embodiments of the invention, the related scan method of a kind of WiMAX of being used for system is provided.
Fig. 1 is the flow chart according to the related scan method of the embodiment of the invention, and is as shown in Figure 1, and this method comprises following processing:
Step S102, travelling carriage sends the CDMA sign indicating number through an adjacent base station in adjacent base station set and initiates related with adjacent base station;
Step S104; Under the ranging response message or the situation of the state of receiving for the ranging response message of continuation that do not receive in the predetermined amount of time of travelling carriage after adjacent base station sends the CDMA sign indicating number from adjacent base station, travelling carriage resends the CDMA sign indicating number to adjacent base station in the correlation time of adjacent base station.
Adopt this above-mentioned processing,, can effectively increase the related probability of successful of MS with neighbor bss through resend the CDMA sign indicating number to adjacent base station.
Fig. 2 is the flow chart according to the preferred process scheme of the related scan method of the inventive method embodiment.
In practical application, can receive after scan type is the MOB_SCN-REQ message of the related scanning of level1 or after SBS initiatively sent the MOB_SCN-RSP message of the type, SBS carried out the coordination association process with neighbor bss at MS.SBS distributes to the relevant parameter of MS alternately through transmission network and neighbor bss.In neighbor bss, keep CDMA code and the preset time period of transmission opportunity offset of distributing to MS, timer T58 is set.SBS sends MOB_SCN-RSP message, wherein carries the related ranging information of distributing to MS.After MS receives, carry out the related scanning process of level1 (that is, initiate among the step S102 with adjacent base station related).Timer according to the embodiment of the invention is as shown in table 1.
Table 1
| The position | Title | Definition | Minimum value | Default value | Maximum |
| MS | T3 | After sending distance measurement request, wait for the time of ranging response message. | - | OFDMA:60ms: in initial ranging and cycle range finding, wait for the time of ranging response message after transmission CDMA sign indicating number or the distance measurement request message.50ms: switch to the target BS of negotiation, wait for the time of ranging response message after the transmission distance measurement request message.200ms: switch the target BS of non-negotiation, send the time of waiting for ranging response message after the distance measurement request message.200ms: reentering of position renewal or park mode, wait for the time of ranging response message after the transmission distance measurement request message.60ms: in the special ranging, wait for the time of ranging response message behind the transmission CDMA sign indicating number. | 200ms |
| BS | T58 | BS is that MS reserves the CDMA sign indicating number of distribution and the time of send opportunity offset information.Zero-time is that BS is that MS provides the beginning of special ranging zone related frame. | - | - | Time between the frame of the vertical shift indication of BS and next neighbor bss. |
| MS | DedicatedRangingRetries | The maximum reattempt times of special ranging request. | 3 | 3 | 16 |
As shown in Figure 2, may further comprise the steps according to the preferred related scan method of the inventive method embodiment:
Step S202, MS receive that scan type is the MOB_SCN-RSP message of 0b010 (level 1 related scanning), resolve the UL-MAP immediately following first frame after rendezvous time, if obtain the special ranging zone, get into step S206; Otherwise, get into step S204.
Step S204, MS stops related with the level 1 of this neighbor bss, carries out the level0 association.
Step S206, MS send CDMA code at the transmission opportunity offset time slot in special ranging zone.
Step S208, MS starts T3, waits for RNG-RSP message.If T3 is overtime and in the correlation time of this neighbor bss, do not receive RNG-RSP, get into step S210; If receive RNG-RSP, get into step S214; If finish with the correlation time of this neighbor bss, get into step S220.
Step S202-step S208 is corresponding to the step S102 among Fig. 1.
Step S210, MS increases number of retries, if do not surpass Dedicated RangingRetries, gets into step S212; Otherwise, get into step S220.
Step S212, MS adjusts transmission power level, and the transmission opportunity offset time slot of special-purpose ranging region in next frame sends CDMA code, and gets into step S208; Wherein, Transmission opportunity offset and CDMA code are that neighbor bss is kept for this MS.
Step S214, MS receive RNG-RSP message, if state is " termination ", get into step S220; If state is " success ", get into step S216; If state is " continuation ", get into step S218.
Step S216, state is " success " in the RNG-RSP message, then carries PHY offset (optional), SLP among the RNG-RSP.If SLP=2, MS can be in local contingency table be designated this BS related, the information among the record RNG-RSP, an and existence timer ASC-AGING-TIMER is set for associations.If this timer expiry, this associations is deleted.This neighbor bss termination timing device T58 discharges the CDMAcode and the transmission opportunity offset that distribute to MS, and gets into step S220.
Step S218, state is " continuation " in the RNG-RSP message, then carries the needed PHY offset of MS, rendezvous time among the RNG-RSP.MS is according to the parameter adjustment local parameter that carries in the RNG-RSP message, and wherein, this parameter comprises transmitting time, transmitted power and sends frequency; At the frame of rendezvous time appointment, the transmission opportunity offset time slot in special ranging zone uses adjusted parameter to send CDMA code.Transmission opportunity offset and CDMA code are that neighbor bss is kept for this MS, and get into step S208.
Step S220, MS stop and this neighbor bss related, begin related next neighbor bss.
Step S210-step S220 is corresponding to the step S104 among Fig. 1.
According to embodiments of the invention, level 1 related scanning possibly also possibly initiated by the base station by Mobile Origination, below in conjunction with accompanying drawing further detailed explanation is carried out in realization of the present invention.
Instance one, Mobile Originated level 1 related scanning
Fig. 3 be according in the related scan method of the inventive method embodiment by the signaling process figure of Mobile Originated level 1 related scan process.
4 base stations have been shown among Fig. 3; Be respectively serving BS, base station 1, base station 2 and base station 3; Wherein, base station 1, base station 2 and base station 3 adjacent base station for scanning, certainly; The quantity of adjacent base station is schematic illustration in the present embodiment, and the quantity of adjacent base station is not limited only to this also can be other quantity.
As shown in Figure 3, comprise the steps: by the related scanning process of Mobile Originated Level1
Step S302, serving BS uses the channel information of broadcast base station 1, base station 2 and the base station 3 of MOB_NBR-ADV message cycle, and travelling carriage obtains the channel information of three adjacent base stations.
Step S304, travelling carriage sends MOB_SCN-REQ message, and it is the related neighbor bss tabulation of association scanning, request of level 1 that request distributes sweep time, scan type.
Step S306, the adjacent base station of serving BS and request is coordinated association process, sends MOB_SCN-RSP message to travelling carriage.Relevant parameter, serving BS that serving BS is distributed to travelling carriage alternately through transmission network and adjacent base station send frame number and the maximum duration of T58 that scans response message.Base station 1 keeps CDMA sign indicating number and the send opportunity skew of distributing to travelling carriage, and timer T58 is set.
Step S308, the related scanning of travelling carriage base station 1.Travelling carriage synchronising base station 1, the frame acquisition UL-MAP in the vertical shift appointment obtains the special ranging zone, sends the CDMA sign indicating number at send opportunity skew time slot.
Step S310 before timer T3 is overtime, and within the correlation time of base station 1, does not receive RNG-RSP, and travelling carriage increases number of retries.Number of retries is less than DedicatedRanging Retries, and travelling carriage is adjusted transmission power level, and the send opportunity of special-purpose ranging region skew time slot sends the CDMA sign indicating number in next frame.
Step S312, before timer T3 is overtime, and within the correlation time of base station 1, travelling carriage is received RNG-RSP, and wherein, state is " termination ", thinks the related failure of travelling carriage and base station 1, and travelling carriage begins to carry out related with base station 2.Base station 1 termination timing device T58 discharges CDMA sign indicating number and the send opportunity skew of distributing to travelling carriage.
Step S314, the related scanning of travelling carriage base station 2.Travelling carriage synchronising base station 2, the frame acquisition UL-MAP in the vertical shift appointment obtains the special ranging zone, sends the CDMA sign indicating number at send opportunity skew time slot.
Step S316, before timer T3 is overtime, and in the correlation time of base station 2, travelling carriage is received RNG-RSP, wherein, state is " continuation ", carries the needed PHY offset of travelling carriage, vertical shift among the RNG-RSP.Travelling carriage adjustment local parameter, at the frame of vertical shift appointment, the send opportunity skew time slot in special ranging zone sends the CDMA sign indicating number.Send opportunity skew and CDMA sign indicating number are that this travelling carriage is kept in base station 2.
Step S318, finish the correlation time of base station 2, the association of Mobile Termination base station 2, beginning is carried out related with base station 3.
Step S320, the related scanning of travelling carriage base station 3.Travelling carriage synchronising base station 3, the frame acquisition UL-MAP in the vertical shift appointment obtains the special ranging zone, sends the CDMA sign indicating number at send opportunity skew time slot.
Step S322, before timer T3 is overtime, and the base station is in 3 correlation times, and travelling carriage is received RNG-RSP, and wherein, status=success carries PHY offset, the grade of service is estimated.The grade of service is estimated as 2, and travelling carriage is this Base Station Identification related in local contingency table, the information among the record RNG-RSP, and an existence timer ASC-AGING-TIMER is set for associations.If this timer expiry, this associations is deleted.Base station 3 termination timing device T58 discharge the CDMA code and the transmission opportunity offset that distribute to travelling carriage.Travelling carriage is waited for and is got into normal running.
The related scanning of the level1 that initiate instance two, base station
Fig. 4 is the signaling process figure according to the level 1 related scan process of being initiated by the base station in the related scan method of the inventive method embodiment.
The process of instance two and instance one is similar basically, and difference is: lack the step S304 in the instance one among the embodiment two;
The step S404 of embodiment two is that serving BS is initiatively coordinated association process with the adjacent base station of recommending scanning.Serving BS initiatively sends MOB_SCN-RSP message to travelling carriage.
Step S406-S420 is consistent with step S308-S322, does not give unnecessary details here.
Above-mentioned instance one and instance two provided respectively according to the related scan method of the embodiment of the invention respectively by the preferred process flow process of base station with the interacting message of Mobile Originated level 1 related scanning.
Device embodiment
According to embodiments of the invention, the related scanning means of a kind of WiMAX of being used for system also is provided, this device is arranged at travelling carriage, and this device can be used to the related scan method that realizes that said method embodiment is provided.
Fig. 5 is the block diagram according to the related scanning means of the embodiment of the invention, and Fig. 6 is the block diagram according to the preferred structure of the related scanning means of apparatus of the present invention embodiment.
As shown in Figure 5, comprise according to the related scanning means of the embodiment of the invention: relating module 10 and sending module 20, particularly:
Relating module 10 is used for sending the CDMA sign indicating number through an adjacent base station to adjacent base station set and initiates related with adjacent base station;
Sending module 20; Be connected to relating module 10; Be used under the ranging response message or the situation of the state of receiving that do not receive in the predetermined amount of time of relating module 10 after adjacent base station sends the CDMA sign indicating number from adjacent base station, in the correlation time of adjacent base station, resending the CDMA sign indicating number to adjacent base station for the ranging response message of continuation.
As shown in Figure 6, sending module 20 specifically comprises:
First sends submodule 210; Be used under situation about not receiving in the predetermined amount of time of relating module after adjacent base station sends the CDMA sign indicating number from the ranging response message of adjacent base station; The power grade of CDMA sign indicating number is sent in adjustment, and resends the CDMA sign indicating number with the regulated transmission power grade to adjacent base station;
Second sends submodule 220; Be used under the situation of state that receives in the predetermined amount of time of travelling carriage after adjacent base station sends the CDMA sign indicating number from adjacent base station for the ranging response message of continuation; According to the parameter adjustment local parameter that carries in the ranging response message, and use adjusted parameter to resend the CDMA sign indicating number to adjacent base station at the send opportunity skew time slot in the special ranging zone of the vertical shift appointment of carrying by ranging response message.
In the practical implementation process; Send the power adjustment of submodule 210 and the concrete processing procedure of sending the CDMA sign indicating number according to first of the embodiment of the invention; And the concrete processing procedure of the transmission CDMA sign indicating number of the second transmission submodule 220 can be referring to Fig. 1, Fig. 2, Fig. 3 or handling process shown in Figure 4; Thereby can increase the related probability of successful with neighbor bss of MS, concrete processing procedure no longer is repeated in this description here.
By means of technique scheme of the present invention, proceed special ranging through making its transmission power level of MS adjustment, can effectively increase the related probability of successful of MS, thereby help to select only neighbor bss as TBS with neighbor bss; In addition, the processing method when not receiving in the related scanning that through improving the RNG-RSP and the state of receiving are the RNG-RSP of " continuation " can guarantee that MS switches to TBS fast.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a related scan method that is used for the WiMAX system is characterized in that, comprising:
It is that the CDMA sign indicating number is initiated related with said adjacent base station that travelling carriage sends the code division multiple access sign indicating number through an adjacent base station in adjacent base station set;
Under the ranging response message or the situation of the state of receiving for the ranging response message of continuation that do not receive in the predetermined amount of time of said travelling carriage after said adjacent base station sends said CDMA sign indicating number from said adjacent base station, said travelling carriage resends said CDMA sign indicating number to said adjacent base station in the correlation time of said adjacent base station.
2. method according to claim 1 is characterized in that, does not receive under the situation from the ranging response message of said adjacent base station at said travelling carriage, and said travelling carriage is specially to the processing that said adjacent base station resends said CDMA sign indicating number:
Said travelling carriage is adjusted its transmission power level, and resends said CDMA sign indicating number with adjusted said transmission power level to said adjacent base station.
3. method according to claim 2 is characterized in that, said travelling carriage to the processing that said adjacent base station resends said CDMA sign indicating number further is:
The send opportunity skew time slot in the special ranging zone of said travelling carriage in next frame resends said CDMA sign indicating number with adjusted said transmission power level to said adjacent base station.
4. method according to claim 3 is characterized in that, before carrying out the resending of said CDMA sign indicating number, said method also comprises:
Surpass under the situation of predetermined special ranging number of retries resending behind the said travelling carriage continuation execution adjustment transmission power level at the number of times of said travelling carriage to the said CDMA sign indicating number that said adjacent base station sends;
Surpass under the situation of said special ranging number of retries at the number of times of said travelling carriage to the CDMA sign indicating number of said base station transmission, said travelling carriage stops the emitting power grade adjustment, and stops to resend said CDMA sign indicating number.
5. method according to claim 1; It is characterized in that; Receive under the situation of state for the ranging response message of continuation from said adjacent base station at said travelling carriage, said travelling carriage is specially to the processing that said adjacent base station resends said CDMA sign indicating number:
Said travelling carriage is according to the parameter adjustment local parameter that carries in the said ranging response message, and uses adjusted parameter to resend said CDMA sign indicating number at the send opportunity skew time slot in the special ranging zone of the vertical shift appointment of being carried by said ranging response message to said adjacent base station.
6. according to each described method in the claim 3 to 5, it is characterized in that said CDMA sign indicating number and the skew of said send opportunity are distributed said travelling carriage by said adjacent base station in advance.
7. method according to claim 6 is characterized in that, said adjacent base station is preserved the preset time period with said CDMA sign indicating number and the skew of said send opportunity.
8. related scanning means that is used for the WiMAX system, it is arranged at travelling carriage, it is characterized in that, comprising:
Relating module is used for sending the CDMA sign indicating number through an adjacent base station to adjacent base station set and initiates related with said adjacent base station;
Sending module; Be used under the ranging response message or the situation of the state of receiving that do not receive in the predetermined amount of time of said relating module after said adjacent base station sends said CDMA sign indicating number from said adjacent base station, in the correlation time of said adjacent base station, resending said CDMA sign indicating number to said adjacent base station for the ranging response message of continuation.
9. device according to claim 8 is characterized in that, said sending module specifically comprises:
First sends submodule; Be used under situation about not receiving in the predetermined amount of time of said relating module after said adjacent base station sends said CDMA sign indicating number from the ranging response message of said adjacent base station; The power grade of said CDMA sign indicating number is sent in adjustment, and resends said CDMA sign indicating number with the regulated transmission power grade to said adjacent base station;
Second sends submodule; Be used under the situation of state that receives in the predetermined amount of time of said travelling carriage after said adjacent base station sends said CDMA sign indicating number from said adjacent base station, use the send opportunity skew time slot of local parameter in the special ranging zone of vertical shift appointment of adjustment to resend said CDMA sign indicating number to said adjacent base station for the ranging response message of continuation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810174674A CN101730163B (en) | 2008-10-30 | 2008-10-30 | Associated scanning method for WiMaX system and device therefor |
Applications Claiming Priority (1)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008047203A2 (en) * | 2006-10-16 | 2008-04-24 | Nokia Corporation | Bandwidth allocation for relay networks using cdma codes |
| CN101222441A (en) * | 2008-01-29 | 2008-07-16 | 北京北方烽火科技有限公司 | WiMAX ascending scheduling and band width distribution method |
| CN101232718A (en) * | 2007-01-22 | 2008-07-30 | 华为技术有限公司 | Distance measuring method, equipment and system |
| CN101257370A (en) * | 2008-03-31 | 2008-09-03 | 华为技术有限公司 | Reliable multicasting implementing method, system and terminal as well as base station |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008047203A2 (en) * | 2006-10-16 | 2008-04-24 | Nokia Corporation | Bandwidth allocation for relay networks using cdma codes |
| CN101232718A (en) * | 2007-01-22 | 2008-07-30 | 华为技术有限公司 | Distance measuring method, equipment and system |
| CN101222441A (en) * | 2008-01-29 | 2008-07-16 | 北京北方烽火科技有限公司 | WiMAX ascending scheduling and band width distribution method |
| CN101257370A (en) * | 2008-03-31 | 2008-09-03 | 华为技术有限公司 | Reliable multicasting implementing method, system and terminal as well as base station |
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