CN102396264B - Method for performing uncontrolled handover - Google Patents

Abstract

A device, system and method for performing an uncontrolled handover in a mobile station, a ranging request message including an identifier of a serving base station and a first identifier used in the serving base station is transmitted to a first target base station to perform network (re)entry to the first target base station, and a ranging response message including security information and a second identifier for identifying the mobile station is received from the first target base station.

Description

For performing the method for not controlled switching

Technical field

The present invention relates to for performing method and apparatus that is efficient and that switch reliably, to be applied to various wireless access system.

Background technology

Conventional switching (HO, HandOver) and range finding (ranging) process will briefly be described below.

HO is the process maintaining ongoing calling when travelling carriage (MS) moves to the cell area of another BS from the cell area of its serving BS (BS) (or comunication area) during calling out without interruption.In other words, HO is the successional function being guaranteed ongoing calling by channel or link switching.

There is the HO of 3 types: softer HO, soft HO and hard HO.

Softer HO is the HO occurred in same community.In softer HO, MS is switched to the better channel in the channel used in cell coverage area.

Soft HO is characterized as to use two adjacent channels and the last HO stopping one of channel gradually simultaneously.In code division multiple access (CDMA), owing to using identical frequency band, easily perform soft HO.

Hard HO is the HO process of a type, wherein after old channel disconnects, sets up new channel immediately.

In order to the cell area of serving BS broadcasts be moved to the cell area of target BS and perform the switching of arriving target BS, MS can perform ranging process.

Range finding refers to one group of process of the quality of connection (especially synchronous) that the radio frequency (RF) for maintaining in IEEE-USA (IEEE) 802.16 or mobile Internet between MS and BS communicates.Based in the multiple access access of OFDM/time division duplex (OFDMA/DD), find range for unimportant down link, because BS sends signal with reference to sequential to multiple MS with single.

On the other hand, multiple MS sends signal on uplink individually, causes different propagation delays.Therefore, range finding is performed between the bs and ms by the independent timing synchronization scheme for up link.That is, range finding is the process that multiple MS corrects their transmission timing.

In order to uplink synchronisation obtains the object of the power control between MS and BS, define initial ranging, Perodic ranging and HO range finding.And, define bandwidth request (BR) range finding, with to BS bandwidth on demand for MS.

Such as, when MS enters BS at first, when powering on as MS or be converted to standby mode from long park mode, enter and connection procedure generation initial ranging for initial network.For MS periodically execution cycle property range finding, synchronous with what follow the tracks of with BS.Synchronous in order to what obtain with target BS during switching, MS performs HO and finds range.BR range finding is used for asking uplink resource allocation to BS.Only after acquisition system synchronization, MS performs BR range finding.

Once receive distance measurement request message from MS, BS just produces the connection identifier (CID (CID) for MS.Then BS performs with negotiation again, the again certification of MS and re-registers.

CID is the address of the connection of the required service stream identified between the counterpart being mapped to medium access control (MAC) sublayer.CID is included in Medium Access Control (MAC) Protocol Data Unit (PDU).That is, each between BS and MS connects by the CID identification in MAC head, and CID is mapped to the service flow identifier (SFID) of service quality (QoS) parameter of the definition service flow relevant to CID.

During MS accesses BS, namely during initialization, each MS can be assigned from the management CID of BS.That is, MS can be assigned from the management CID of BS during a series of range finding and registration process.Management CID can be divided into basic CID (BCID), main CID (PCID) and auxiliary CID (SCID).

BCID identifies MS between initial access periods for making BS.That is, the MAC Address of MS is mapped to BCID.PCID may be used for authentication message and Dynamic Resource Allocation for Multimedia related news.SCID is optional, can determine whether to use SCID during MS capability negotiation.

Except management CID, exist for identifying transmission CID (TCID) that customer flow serves, for identifying broadcast CID and the multicast CID of broadcast traffic.TCID can distribute to each connection of setting up between MS and BS.

It is a kind of when MS moves to target BS from serving BS broadcasts, by utilizing the minimal disruption time that the data context that MS is communicating with serving BS broadcasts is converted to target BS, making MS can continue the technology of its ongoing communication target BS for switching (HO).That is, HO guarantees the continuity of the service that MS receives.

Except normally switching, there is not the particular procedure for not controlled switching.In addition, during not controlled switching, its MAC Address should be sent to target BS to perform ranging process by MS.In this case, may be difficult to ensure the location privacy for MS.

That is, the process of the location privacy considered for ensureing MS is necessary, with the security threat protecting MS can not be subject to malice during not controlled switching.

In order to provide location privacy to MS, hash MAC Address and temporary staging ID (STID) may be used for MS.But, because hash MAC Address and/or interim STID should distribute to MS, so unnecessarily may extend ranging process during finding range.

Summary of the invention

Technical problem

For solve the problem and the object of the invention is to of designing a kind of for performing method and apparatus that is efficient and that switch reliably.

For solving the problem and a kind of method supported when MS performs not controlled switching for the location privacy of MS of another object of the present invention is to of designing.

For to solve the problem and the of the present invention another object that designs is a kind ofly to divide by MS the method being used in the STID used in target BS when MS performs the not controlled switching from serving BS broadcasts to target BS efficiently.

It will be understood by those skilled in the art that the object utilizing the present invention to realize be not limited to above the special object described, the above and other object that the detailed description below in conjunction with accompanying drawing will more clearly be understood the present invention and can realize.

Technical scheme

In order to solve the problems of the technologies described above, the invention provides the various method and apparatus for performing efficient and reliable HO, to be applied to various wireless access system.

In an exemplary embodiment of the present invention embodiment, when first object BS is not included in the candidate BS recommended by serving BS broadcasts, or when MS with the HO ranging process of target BS in failure (that is, MS can not arrive target BS) time, not controlled HO can be performed.

Object of the present invention can by being provided for performing the system of not controlled switching, equipment and method in MS and realizing, the method comprises: send distance measurement request message to first object BS and enter to perform network (weight), the ID that this distance measurement request message comprises serving BS broadcasts and the ID used in serving BS broadcasts; And receiving ranging response message from first object BS, this ranging response message comprises effective security information and the 2nd ID for identifying MS.

The method also can comprise: receive the switching command message comprising handover information and the information about candidate BS from serving BS broadcasts.At least one in parameter operate time that handover information can comprise the beginning that indication network enters or reenters, the special switching ranging code used in candidate BS and the ranging opportunity used in candidate BS.

If MS platform performs not controlled switching, then the method can also comprise: send switch indicating information to serving BS broadcasts, this switch indicating information comprises the ID of the event code of the not controlled switching of instruction and the first object BS as the selected objective target BS of MS.

First identifier can be identify uniquely in serving BS travelling carriage station identification symbol (STID), the second identifier can be identify uniquely in first object base station travelling carriage station identification symbol and for the protection of in the temporary staging identifier of the location privacy of travelling carriage.

The method can also comprise: send ranging code to first object BS and enter to perform network (weight); And as the response to ranging code, receive ranging response message, this ranging response message comprises the assignment information about the resource-area distributed for ranging process.Distance measurement request message can be sent in the resource-area indicated by assignment information.

Effective security information can comprise message authentication code (CMAC) tuple based on ciphertext.

In another aspect of this invention, a kind of system, equipment and method for performing not controlled switching provided herein, the method comprises: enter period at the network (weight) with MS and receive distance measurement request message from MS, the ID of this distance measurement request messenger service BS and the ID used in serving BS broadcasts; And sending ranging response message to MS, this ranging response message is included in effective security information and the 2nd ID for identifying MS in target BS.

First identifier can be identify uniquely in serving BS travelling carriage station identification symbol (STID), the second identifier can be identify uniquely in first object base station travelling carriage station identification symbol and for the protection of in the temporary staging identifier of the location privacy of travelling carriage.

Effective security information can comprise message authentication code (CMAC) tuple based on ciphertext.

The method can also comprise: receive ranging code from MS and enter to perform network (weight); And as the response to ranging code, send ranging response message to MS, this ranging response message comprises the assignment information about the resource-area distributed for ranging process.Distance measurement request message can be received in the resource-area indicated by this information.

The method can also comprise: the serving BS broadcasts identified to the ID by serving BS broadcasts sends request the request message of the information about MS; And the response message of the information comprised about MS is received from serving BS broadcasts.Information about MS can comprise the MAC Address of MS.

In still yet another aspect of the present, a kind of MS for performing not controlled switching provided herein, this MS comprises: sending module, for controlling the transmission of the message for not controlled switching; Receiver module, for controlling the reception of the message for not controlled switching; Memory, for storing parameter for not controlled switching and information element; And processor, for controlling uncontrolled switching.This processor can enter with the network (weight) of execution to first object BS and control not controlled switching by utilizing receiver module to receive ranging response message from first object BS by utilizing sending module to send distance measurement request message to first object BS, the ID that this distance measurement request message comprises serving BS broadcasts and the ID used in serving BS broadcasts, this ranging response message comprises effective security information and the 2nd ID for identifying travelling carriage.

Receiver module can receive from serving BS broadcasts the switching command message comprising handover information and the information about candidate BS, and sends switching command message to processor.Processor can bank switching message in memory, and perform not controlled switching based on handover information.

At least one in parameter operate time that handover information can comprise the beginning that indication network (weight) enters, the switching ranging code used in candidate base station and the ranging opportunity used in candidate base station.

If MS performs not controlled switching, then processor sends switch indicating information by sending module to serving BS broadcasts, and this switch indicating information comprises the ID of the event code of the not controlled switching of instruction and the first object BS as the selected objective target BS of MS.

First identifier can be identify uniquely in serving BS travelling carriage station identification symbol (STID), the second identifier can be identify uniquely in first object base station travelling carriage station identification symbol and for the protection of in the temporary staging identifier of the location privacy of travelling carriage.

Effective security information can comprise message authentication code (CMAC) tuple based on ciphertext.

Processor can by utilize sending module to first object BS send ranging code using performs network (weight) and enters and as the response to ranging code, utilize receiver module reception ranging response information to control not controlled switching, this ranging response information comprises the assignment information about the resource-area distributed for ranging process.Processor can control sending module and send distance measurement request message in the resource-area indicated by assignment information.

In still yet another aspect of the present, a kind of method for performing not controlled switching in mobile communication terminals provided herein, whether the method comprises the following steps: the Resource Holding Timer time-out determining serving BS; If Resource Holding Timer does not have time-out, then to enter with the network (weight) performed for described target BS initiate not controlled switching by sending distance measurement request message to target BS, this distance measurement request message comprise described serving BS identifier and for the first temporary identifier by mobile communication terminal described in described serving BS identification; And receiving ranging response message from described target BS, this ranging response message comprises security information and for the second temporary identifier by mobile communication terminal described in described target BS identification.

The method is further comprising the steps of: before described target BS, be confirmed as the selected objective target base station of described mobile communication terminal and the candidate base station that described target BS is not described serving BS to be recommended time, or when described mobile communication terminal can not arrive any candidate base station of described serving BS recommendation, initiate not controlled switching.

The method is further comprising the steps of: receive switching command message from described serving BS, this switching command message comprises handover information and the information about candidate base station.

At least one in parameter operate time that described handover information can comprise the beginning that indication network (weight) enters, the switching ranging code used in candidate base station and the ranging opportunity used in candidate base station.

The method is further comprising the steps of: send switch indicating information to described serving BS, and this switch indicating information comprises the event code of the beginning of the not controlled switching of instruction and described target BS is identified as the identifier of selected objective target base station of described mobile communication terminal.

The method is further comprising the steps of: send ranging code to described target BS and enter to perform network (weight); And reception ranging response message, as the response to described ranging code, this ranging response message comprises the assignment information about the resource-area distributed for ranging process, wherein in the resource-area indicated by described assignment information, sends described distance measurement request message.

Described security information can comprise message authentication code (CMAC) tuple based on ciphertext.

The method is further comprising the steps of: when Resource Holding Timer does not have time-out, send the second distance measurement request message to described target BS to enter with the network (weight) performed for described target BS, this distance measurement request message comprises the persistent identifier of mobile terminal; And receiving ranging response message from described target BS, this ranging response message comprises security information and the 3rd temporary identifier for identifying described mobile communication terminal.

In another aspect of this invention, one provided herein is used at mobile communication terminal, the method of not controlled switching is performed between serving BS and target BS, the method comprises: if the Resource Holding Timer of serving BS does not have time-out, then once receive distance measurement request message at target BS place from mobile communication terminal, just initiate not controlled switching, this distance measurement request message comprises the request that the execution from described mobile communication terminal enters for the network (weight) of described target BS, this distance measurement request message comprise described serving BS identifier and for the first temporary identifier by mobile communication terminal described in described serving BS identification, and sending ranging response message from described target BS to described mobile communication terminal, this ranging response message comprises security information and for the second temporary identifier by mobile communication terminal described in described target BS identification.

Before described mobile communication terminal, determined that described target BS is the selected objective target base station of described mobile communication terminal and the candidate base station that described target BS is not described serving BS to be recommended time, or when described mobile communication terminal can not arrive any candidate base station of described serving BS recommendation, not controlled switching can be initiated by described mobile communication terminal.

The method is further comprising the steps of: send handover information and base station information from described target BS to described serving BS, described handover information and base station information are sent in the switching command message of described mobile communication terminal by described serving BS for being comprised in.

At least one in parameter operate time that described handover information can comprise the beginning that indication network (weight) enters, the switching ranging code used in candidate base station and the ranging opportunity that uses in described target BS.

The method is further comprising the steps of: in described target BS, receive ranging code from described mobile communication terminal, enter to perform network (weight); And send ranging response message from described target BS to described mobile communication terminal, as the response to described ranging code, this ranging response message comprises the assignment information about the resource-area distributed for ranging process, wherein in the resource-area indicated by described assignment information, sends described distance measurement request message.

Described security information comprises message authentication code (CMAC) tuple based on ciphertext.

The method is further comprising the steps of: if Resource Holding Timer does not have time-out, then receive the second ranging request information at described target BS place from described mobile communication terminal to enter with the network (weight) performed for described target BS, and wherein this distance measurement request message comprises the persistent identifier of mobile terminal; And sending ranging response message from described target BS to described mobile communication terminal, this ranging response message comprises security information and the 3rd temporary identifier for identifying described mobile communication terminal.

In another aspect of this invention, a kind of mobile communication terminal being configured to perform not controlled switching provided herein, this mobile communication terminal comprises: transmitter module; Receiver module; Memory; And being operably connected to the processor of described transmitter module, described receiver module and described memory, whether this processor is configured to the Resource Holding Timer time-out determining serving BS.

If Resource Holding Timer does not have time-out, then the described processor of described mobile communication terminal to enter with the network (weight) performed for described target BS initiate not controlled switching by sending distance measurement request message to target BS, this distance measurement request message comprise described serving BS identifier and for the first temporary identifier by mobile communication terminal described in described serving BS identification; And receiving ranging response message from described target BS, this ranging response message comprises security information and for the second temporary identifier by mobile communication terminal described in described target BS identification.

This processor is configured to: before described target BS, be confirmed as the selected objective target base station of described mobile communication terminal and the candidate base station that described target BS is not described serving BS to be recommended time, or when described mobile communication terminal can not arrive any candidate base station of described serving BS recommendation, initiate not controlled switching.

This processor is also configured to: receive switching command message from described serving BS, this switching command message comprises handover information and the information about candidate base station.

At least one in parameter operate time that described handover information can comprise the beginning that indication network (weight) enters, the switching ranging code used in candidate base station and the ranging opportunity used in candidate base station.

This processor can be configured to: send switch indicating information to described serving BS, and this switch indicating information comprises the event code of the beginning of the not controlled switching of instruction and described target BS is identified as the identifier of selected objective target base station of described mobile communication terminal.

This processor can be configured to: send ranging code to described target BS and enter to perform network (weight), and reception ranging response message, as the response to described ranging code, this ranging response message comprises the assignment information about the resource-area distributed for ranging process, and wherein in the resource-area indicated by described assignment information, sends described distance measurement request message.

Described security information can comprise message authentication code (CMAC) tuple based on ciphertext.If Resource Holding Timer does not have time-out, then processor is configured to: send the second distance measurement request message to described target BS and enter with the network (weight) performed for described target BS, this distance measurement request message comprises the persistent identifier of mobile terminal; And receiving ranging response message from described target BS, this ranging response message comprises security information and the 3rd temporary identifier for identifying described mobile communication terminal.

Above-mentioned aspect of the present invention is only the part of the preferred embodiment of the present invention, therefore it should be appreciated by those skilled in the art that the various execution modes that can realize reflection technical elements of the present invention based on the detailed description below of the present invention.

Beneficial effect

Illustrative embodiments of the present invention has following effect.

First, user can perform efficient and reliable HO.

Secondly, when MS perform not controlled HO time, the location privacy of MS can be supported.

Again, when MS perform not controlled HO time, STID can distribute to MS efficiently, to use in target BS.

It will be understood by those skilled in the art that the effect utilizing the present invention to realize be not restricted to above the special effect described, the detailed description below by reference to the accompanying drawings more clearly will understand above and other advantage of the present invention.

Accompanying drawing explanation

Accompanying drawing is included to provide further understanding of the present invention, illustrates embodiments of the present invention and be used from specification one to explain principle of the present invention.

Fig. 1 illustrates that the entirety in IEEE-USA (IEEE) 802.16e system switches the flow chart of (HO) process.

Fig. 2 is the figure that the signal stream switching (HO) process for the entirety in IEEE 802.16e system is described.

Fig. 3 illustrates that wherein travelling carriage (MS) performs the figure to the situation of the not controlled HO of preferred neighbours BS.

Fig. 4 be illustrate when MS in the switching of target BS during failure execution to the figure of the signal stream of the method for the switching of neighbours BS.

Fig. 5 be illustrate according to exemplary embodiment of the invention when MS performing to the figure of the signal stream of the method for the switching of neighbours BS during failure in the switching of target BS.

Fig. 6 be illustrate according to another illustrative embodiments of the present invention when MS performing to the figure of the signal stream of the method for the switching of neighbours BS during failure in the switching of target BS.

Fig. 7 be illustrate according to another illustrative embodiments of the present invention when MS performing to the figure of the signal stream of the method for the switching of neighbours BS during failure in the switching of target BS.

Fig. 8 be illustrate according to exemplary embodiment of the invention when MS performing to the figure of the signal stream of the method for the switching of neighbours BS during failure in the switching of target BS.

Fig. 9 is the block diagram of MS and BS for performing the illustrative embodiments of the present invention shown in Fig. 2 to 8 according to the another execution mode of the present invention.

Embodiment

Illustrative embodiments of the present invention provides for performing multiple method and apparatus that is efficient and that switch reliably, to be applied to various wireless access system.

The illustrative embodiments described hereinafter is the combination of element of the present invention and feature.Unless specifically stated otherwise, element or feature can be considered to optionally.Each element or feature can not be put into practice with other elements or Feature Combination.In addition, embodiments of the present invention can be constructed by built-up section element and/or feature.The operating sequence described in embodiments of the present invention can be rearranged.Some structures of any one execution mode can comprise in another embodiment, and can be replaced by the relative configurations of another execution mode.

In the description of the figures, omission may be obscured the process of theme of the present invention or the detailed description of step.And, will the process or step that it will be appreciated by those skilled in the art that not described.

In an exemplary embodiment of the present invention embodiment, description is made for the data input and data output relation between BS and MS.Herein, term " BS " refers to the terminal node of the network directly communicated with MS.In some cases, the specific operation being described as being performed by BS can be performed by the upper layer node of BS.

That is, clearly, in the network be made up of the multiple network nodes comprising BS, can perform by BS or the network node being different from BS the various operations performed to communicate with MS.Term " BS " can use term " fixed station ", " Node B ", " eNode B (eNB) " or the replacement such as " advanced base station (ABS) ", " access point ".

And term " MS " can use the replacement such as term " subscriber equipment (UE) ", " subscriber station (SS) ", mobile subscriber station, " mobile terminal ", " advanced travelling carriage (AMS) " or " terminal ".

Transmitter is to provide the fixing and/or mobile node of data or voice service, and receiver is the fixing and/or mobile node receiving data or voice service.Therefore, for up link, MS can be transmitter and BS can be receiver.For down link, MS can be receiver and BS can be transmitter.

Illustrative embodiments of the present invention can by for one of at least disclosed standard document support in following system: IEEE-USA (IEEE) 802 system, third generation partner program (3GPP) system, 3GPP Long Term Evolution (LTE) system and 3GPP2 system.That is, step that illustrate theme of the present invention in an exemplary embodiment of the present invention embodiment, that do not describe or parts can be used for herein by these document supports.

According to standard document, all terms used in specification can be described.Especially, illustrative embodiments of the present invention by one of at least supporting in IEEE 802.16 standard document below, P802.16e-2004, P802.16e-2005, P802.16Rev2 and P802.16m, can be incorporated to the full content of these documents herein by reference.

Now, above and other aspect of the present invention is described with reference to accompanying drawing in detail by preferred implementation.Detailed description is intended to explain illustrative embodiments of the present invention, instead of shows only execution mode that can realize according to the present invention.

There is provided the particular term used in an exemplary embodiment of the present invention embodiment to be understand the present invention better to help, and other terms in scope of the present invention can be used to replace these particular term.

Such as, term " not controlled switching (HO, uncontrolled Handover) " can use interchangeably with " do not cooperate (un-coordinated or uncooperative) HO ".

Fig. 1 is the flow chart of the overall HO process illustrated in IEEE-USA (IEEE) 802.16e system.

With reference to figure 1, in step S101 and S102, MS enters period selection community at HO and initial network.Community is selected to be that scanning or one or more BS that finds range will set up with it the process of the ABS of network connection or execution HO to search for MS.MS should schedule scanning intervals or sleep interval, can be used for initial network to enter or as the target BS for HO to adjudicate BS.

In step s 103, MS acquisition is synchronous with serving BS broadcasts, and enters period from serving BS broadcasts receiving downlink parameter at initial network.Serving BS broadcasts refers to the BS being this moment intended to provide in the network entered service at MS.Serving BS broadcasts can be called the BS in service.Obtain with serving BS broadcasts synchronous after, MS from serving BS broadcasts acquisition uplink parameter, and adjusts uplink parameter by performing ranging process with serving BS broadcasts in step S104 in step S105.In step s 106, MS and reception BS have established the basic capacity for communicating between which in above process.In step s 107, serving BS broadcasts certification MS and with MS exchange encryption keys.Therefore, in step S108, MS registers to serving BS broadcasts, and in step S109, sets up Internet protocol (IP) between which and connect.

In step s 110, serving BS broadcasts makes MS can executive communication process to MS transmit operation parameter, and in step S111, connects between MS and serving BS broadcasts.In step S112, MS and serving BS broadcasts now can normal runnings.In step S113, MS even with BS normal running during also search for neighbours BS continuously.

Performing the reason of step S113 is to search for the neighbours BS that can provide better services when therefore MS declines from the service quality of serving BS broadcasts away from serving BS broadcasts during movement.This neighbours BS is called as target BS, and MS can perform HO by search target BS.

Generally speaking, there is HO when MS moves to target BS from serving BS broadcasts.HO is the process by MS, wave point, service flow, Network Access Point etc. being switched to target BS from serving BS broadcasts.In step S114, HO starts from the judgement about HO that MS, serving BS broadcasts or network manager are made.

In step sl 15, MS select target BS.In step S116, MS obtains and the synchronous of target BS and the downlink parameter from target BS.MS obtains uplink parameter from target BS in step S117, and measuring distance of target BS in step S118 also adjusts the uplink parameter with target BS.If MS have received the NBR-ADV message of identifier (ID) and frequency and the uplink/downlink channel descriptor (UCD/DCD) comprising target BS, then scanning and synchronizing process can simplify.If target BS have received HO notice via backbone network from serving BS broadcasts, then it can be provided based on non-competing initial ranging chance to MS by up-MAP (UL-MAP) message.

In step S119, MS and target BS establish basic capacity in above process.MS and target BS start network by range finding and reenter (re-entry) process.In the step s 120, MS performs and re-registers and re-establish the connection with target BS.Therefore, in step S121, MS registers to target BS, and in step S122, re-establishes IP and connect between MS and target BS.Target BS is the serving BS broadcasts of MS now, and can provide service to MS.

Based on the Information Selection community about neighbours BS obtained by scanning, and the switching from serving BS broadcasts to target BS can be adjudicated about the HO in Fig. 1, MS.After HO judgement, MS acquisition is synchronous with target BS, and performs the ranging process with target BS.MS is then by certification again.During certification again, target BS can by backbone message to the information of serving BS broadcasts request about MS.

According to target BS preserve the information about MS, can greatly simplify switching and network reenter process.And, according to the MS amount of information that target BS has, some networks can be omitted and enter process.

Although mainly describe the HO that MS initiates in FIG, serving BS broadcasts can be considered communications status between MS and serving BS broadcasts and determine whether MS will perform HO.Even if as serving BS broadcasts judgement HO, also HO can be performed according to the mode similar with process illustrated in fig. 1.

hO in IEEE 802.16m

Fig. 2 is the figure of the signal stream illustrated for the overall HO process in IEEE 802.16m system.

In IEEE 802.16m system, HO process can relate generally to (1) HO judgement and initiation, (2) HO prepare and (3) HO performs.

Before these 3 processes of execution, AMS needs to perform scanning process, and in scanning process, AMS collects the information about the advanced base station (ABS) of neighbours.Scanning process is similar to the scanning process in IEEE 802.16e network.Such as, when there is the non-communicating cycle that AMS does not communicate with the ABS (S-ABS) in service, AMS can scan neighbours ABS during the non-communicating cycle.

In HO judgement and initiation process, AMS or S-ABS can initiate HO.In IEEE 802.16m system, under MS condition below, initiate HO.

The condition when definition AMS will measure to S-ABS report scan.

The HO being sent AAI_HO-REQ message by AMS is initiated.

When definition AMS can not maintain the condition with the communication of S-ABS.

When AMS performs the HO of target ABS (T-ABS), S-ABS determines whether that will perform interruption advances into (EBB, Entry Before Break) or enter front interruption (BBE, Break Before Entry).

In fig. 2, (A) part represents the HO that S-ABS initiates, and (B) part represents the HO that AMS initiates.

With reference to (A) part of figure 2, S-ABS can consult to be used for the condition that HO performs and the resource will distributing to AMS with one or more T-ABS, to perform cooperation HO.

In step S210, S-ABS can send AMS information by HO-REQ message to one or more T-ABS.

In step S212, each in one or more T-ABS can send HO information by HO-RSP message to S-ABS, and HO information is included in T-ABS at least one in the special ranging code and ranging opportunity that can be used for AMS.HO-RSP message can also be included at least one in the platform ID (STID) and safe context (such as, current (nonce)) used in T-ABS.

In step S214, S-ABS can pass through switching command (AAI_HO-CMD) message and send about the HO information of one or more candidate ABS (such as target BS) to AMS.

AAI_HO-CMD message can also comprise operate time parameter and opening time parameter.Parameter instruction operate time AMS should perform the time that network reenters, and parameter instruction opening time S-ABS should discharge the time of up link and down-chain resource from AMS.

With reference to (B) part of figure 2, when meeting HO condition, in step S220, AMS can ask HO by handover request (AAI_HO-REQ) message to S-ABS.

Once receive AAI_HO-REQ message from AMS, then in step S222, S-ABS can send the HO-REQ message of the AMS information comprised about AMS to one or more candidate ABS.

Step S224 is identical with S214 with step S212 with S226, therefore will not provide the repeated description of step S224 and S225 herein.Step S210, S212, S214, S220, S222, S224 and S226 can correspond to HO set-up procedure.In HO set-up procedure, the STID of AMS preliminary (preliminarily) can upgrade between AMS and T-ABS, the safe context (such as, current) of AMS can by sending and receiving security information and upgrade in advance between AMS and T-ABS.And special ranging code can distribute to AMS, for using in T-ABS.

After HO set-up procedure, in step S228, AMS optionally can send AAI_HO-IND message to S-ABS.

AAI_HO-IND message can comprise the event code described in table 1 below.

Table 1

[table 1]

Reference table 1, when AMS sends AAI_HO-IND message to S-ABS, it can arrange event code in AAI_HO-IND message.If event code is set to " 1 " (=code 1), this means that AMS have selected one in multiple candidate ABS.If event code is set to " 2 " (=code 2), this means any one that AMS can not arrive in candidate ABS, and AMS can perform not controlled HO process after a while.In this case, AMS comprises the new T-ABS selected in AAI_HO-IND message.

If event code is set to " 3 " (=code 3), this means that AMS can not be maintained to the connection of S-ABS, until time-out opening time that S-ABS is arranged.If event code is set to " 4 " (=code 4), this means that AMS cancels HO.

That is, when AMS have received from S-ABS the AAI_HO-CMD message comprised about the HO information of multiple candidate ABS, AMS will perform the final goal ABS of HO by AAI_HO-IND message informing S-ABS AMS.

If S-ABS only arranges a candidate ABS in AAI_HO-CMD message, then AMS does not need the T-ABS that it is selected by AAI_HO-IND message informing S-ABS.When being cancelled as HO or occurring some problems at HO period HO, AMS also can be sent to S-ABS by AAI_HO-IND message and cancel or the information of HO problem about HO.That is, AAI_HO-IND message is optional and optional.

HO implementation can be implemented at the time place of parameter instruction operate time.That is, in step S230, AMS can perform at the time place of parameter instruction operate time and reenter process with the network of T-ABS.

In step S230, AMS can reenter process to T-ABS transmission CDMA ranging code or AAI_RNG-REQ message to perform network at place's operate time.

When EBB, reenter period at network, AMS can communicate with S-ABS in predetermined availability interval (AI) period.Meanwhile, in step S240, in unavailable interval (UAI) period, the network that AMS can perform for T-ABS reenters.

On the other hand, when BBE, uncertain AI or UAI.Therefore, AMS operates according to the mode identical with the hard HO left in IEEE802.16e network.

Reenter once complete network, then in step s 250, T-ABS sends HO-CMPLT message to S-ABS, and in step S260, between AMS and T-ABS, sets up data path.

HO process illustrated in fig. 2 can be called controlled HO or cooperation HO.Message as described with reference to figure 2 and parameter can be applied to following illustrative embodiments of the present invention.Under certain conditions, can change or revise these message and parameter.

not controlled HO

In cooperation HO process is carried out, the not controlled or HO that do not cooperate may be there is for AMS.In this case, AMS should according to enter identical mode for initial network and perform the range finding with T-ABS.

The not controlled or HO that do not cooperate of main existence two type.(situation of the ABS that do not cooperate) is there is in the first type (Class1) when any one preferably in the candidate ABS that arranges in AAI_HO-CMD message of (prefer) S-ABS of ABS.But the second type (type 2) is attempted network at AMS and is reentered T-ABS send CDMA ranging code to T-ABS or send/receive when ranging message occurs unsuccessfully to/from T-ABS and trigger (situation that can not arrive T-ABS).

Fig. 3 illustrates that wherein AMS performs the figure of the situation of the not controlled HO of Class1 to its preferred neighbours ABS.

Suppose be in figure 32 STID be assigned to AMS, the BSID of S-ABS is 3, and a T-ABS in candidate ABS and the 2nd T-ABS have respectively be 4 BSID and be 5 BSID.

With reference to figure 3, in step S301, AMS can send AAI_HO-REQ message to initiate HO to S-ABS.

Step S301 can only perform when the HO that AMS initiates, and does not perform when the HO that ABS-initiates.In other words, according to HO situation, step S301 is optional.

The S-ABS of BSID=3 can send the AAI_HO-REQ message of the AMS information comprised about AMS to one or more candidate ABS.AMS information can comprise the MAC Address and/or AMS context etc. of AMS.Simple in order to mark, suppose to suppose that S-ABS sends HO-REQ message to a T-ABS of BSID=4 in step s 302.

In step S303, one T-ABS of BSID=4 can send to S-ABS the HO-RSP message that the network being included in AMS reenters the HO information of middle use via backbone network, HO information be such as special ranging code, ranging opportunity, operate time parameter, UAI/AI etc.

And HO-RSP message can also comprise the parameter and/or the resource retention time parameter of period that is maintained of the instruction information relevant to S-ABS operate time that instruction performs the time of network when entering.

In step s 304, S-ABS can send to AMS the AAI_HO-CMD message comprising HO information and the information about the candidate ABS recommended.Information about the candidate ABS recommended can be the list of the ID (such as BSID=4) of the candidate ABS recommended or the candidate ABS of recommendation.

AMS preferably may be different from the T-ABS of the candidate ABS of the recommendation arranged in AAI_HO-CMD.In step S305, then AMS can send to S-ABS and comprise the AAI_HO-IND message being set to the event code (code 2) of 2 and the ID (BSID=5) of preferred T-ABS.By this way, AMS can perform the not controlled HO of the 2nd T-ABS (BSID=5).

Because also do not perform HO set-up procedure between T-ABS and S-ABS of BSID=5, so the 2nd T-ABS and AMS can not upgrade security information and/or the STID of AMS in advance.Therefore, the location privacy of AMS may be subject to invade.

In order to support the location privacy of AMS, AMS and the 2nd T-ABS should reenter process by using the hash MAC Address of AMS or MAC Address and interim STID to perform network.In this case, there is not the cooperation between S-ABS and the 2nd T-ABS, between two ABS, do not share the safe context relevant to AMS.Therefore, do not perform HO to optimize.

AMS can move in the cell area of the 2nd T-ABS of its preferred BSID=5, and receives the leading or superframe header (SFH) from the 2nd T-ABS periodic broadcast.That is, in step S306, AMS can use leading or SFH obtains and the downlink synchronization of the 2nd T-ABS.

In step S307, after downlink synchronization obtains, AMS can send the CDMA ranging code based on competition to the 2nd T-ABS in ranging opportunity the earliest, reenters with the network performed for the 2nd T-ABS.

Once receive CDMA ranging code, the 2nd T-ABS can to AMS Resources allocation district, AMS and T-ABS will send and receive ranging message in resource-area.Therefore, in step S308, the 2nd T-ABS can send the AAI_RNG-RSP message of the information comprised about the Radio Resource distributed to AMS.

In step S309, AMS can send AAI_RNG-REQ message to the 2nd T-ABS in the resource-area distributed.AAI_RNG-REQ message can comprise effectively based on message authentication code (CMAC) tuple of ciphertext.

In step S310, the 2nd T-ABS can to AMS send AMS by the interim STID that uses in the 2nd T-ABS and in the 2nd T-ABS effective CMA tuple.

AMS and the 2nd T-ABS can use interim STID to the ability of consulting in step S311, and it is current to upgrade in authentication phase in step S312.

In step S313, the 2nd T-ABS can also by distributing the special STID of AMS with AMS exchange of management information to AMS.

In step S314, the AMS being established to the connection of the 2nd T-ABS can use STID reliably send data to the 2nd T-ABS and receive data from the 2nd T-ABS.

Fig. 4 illustrates when AMS is at the figure performing the signal stream of the method for the not controlled HO of the type 2 of neighbours ABS in the HO of T-ABS during failure.

When shown in Fig. 4, AMS occurs unsuccessfully owing to being not intended to mistake in the HO of the T-ABS recommended to S-ABS, and performs the HO of another T-ABS with not controlled way, and need not notify this situation of S-ABS.Step S401 to S404 is identical with the step S301 to S304 of Fig. 3.Therefore, for step S401 to S404, with reference to figure 3.

CDMA ranging code can be sent, to perform the HO of a T-ABS at place's operate time to the T-ABS of BSID=4 with reference to figure 4, AMS.But, in step S405, due to its channel status, occur unsuccessfully when AMS may send CDMA ranging code in ranging opportunity time restriction.

Therefore, AMS can perform the not controlled HO of the 2nd T-ABS.Step S406 to S414 is identical with step S306 to S314.Therefore, for step S406 to S414, can reference diagram 3.

Describe not controlled HO with reference to figure 3 and 4.HO process shown in Fig. 1 and 2 is used for controlled or cooperation HO, and controlled or cooperation HO is supplementing of not controlled HO.

Fig. 5 be illustrate according to an illustrative embodiment of the invention when MS performing to the figure of the signal stream of the method for the switching of neighbours BS during failure in the switching of target BS.

Fig. 5 discloses and in target BS, distributes unique method identifying the STID of AMS when the AMS network performed under not controlled HO situation for T-ABS reenters.When shown in Fig. 5, perform the not controlled HO of the type 2 with reference to figure 4 description.

With reference to figure 5, no matter how, the information about AMS can be kept the time grown the same as the value of Resource Holding Timer to the HO of AMS by S-ABS, and not deletion AMS information immediately.Therefore, during not controlled HO, when AMS returns S-ABS or another T-ABS to S-ABS request AMS information, S-ABS can again provide service to AMS immediately or send AMS information to T-ABS rapidly.

Namely, during the not controlled HO of AMS to T-ABS, if T-ABS has the knowledge of AMS from the S-ABS of its movement, then it can ask AMS information to S-ABS, guarantees location privacy for AMS thus and performs residue HO process efficiently or network reenters process.

But once provide the Resource Holding Timer time-out of the S-ABS of service to AMS, then AMS should perform and enter same or similar ranging process with the initial network for T-ABS.(AMS knows that when overtime the Resource Holding Timer of S-ABS is.) namely, AMS should comprise the MAC Address of AMS instead of effective message authentication code (CMAC) tuple based on ciphertext.The timer of time-out enters request of asking/reenter and can also comprise S-ABS ID, and T-ABS is had to the selection of base station queries before about the information of AMS.

The step S501 to S507 of Fig. 5 is identical with the step S401 to S407 of Fig. 4.Therefore, for step S501 to S507, can the description of reference diagram 3 and Fig. 4.

Once receive the CDMA ranging code based on competition from AMS, then the 2nd T-ABS of BSID=5 can to AMS Resources allocation district, and the network that AMS is performed for the 2nd T-ABS in resource-area reenters.Information about the resource-area distributed can be included in CDMA assignment information element (IE).In step S508, the 2nd T-ABS can send to AMS the AAI_RNG-RSP message comprising CDMA and distribute IE.

In step S509, AMS can distribute in the Resources allocation district of IE instruction to the 2nd T-ABS transmission AAI_RNG-REQ message at CDMA.The BSID (=3) that AAI_RNG-REQ message can comprise old S-ABS and the STID (=2) of AMS used in old S-ABS.

Once receive AAI_RNG-REQ message from AMS, the BSID that the 2nd T-ABS can be arranged from AAI_RNG-REQ message learns the old S-ABS of AMS.Therefore, in step S510, the 2nd T-ABS can correspond to the AMS information of the STID of AMS to S-ABS request.

Once receive AMS association requests from the 2nd T-ABS within the period being set to Resource Holding Timer, in step S511, S-ABS can send the AMS information relevant to AMS to the 2nd T-ABS.AMS information can comprise the MAC Address of AMS, information about the basic capacity of AMS, security parameter (such as security performance, authenticate key (AK) etc.) and current at least one.

In step S512a and S512b, security parameter that the 2nd T-ABS can use its to share, current, AK etc. carry out certification AMS.

In step S513, the 2nd T-ABS can use AAI_RNG-RSP message to reply AAI_RNG-REQ message to AMS, and this AAI_RNG-RSP message comprises uniquely distributes to the new STID of AMS, the current of renewal etc.AAI_RNG-RSP message can also be included in effective CMAC tuple in the 2nd T-ABS.

If perform the verification process of step S512a and S512b after HO ranging process, then the 2nd T-ABS can send interim STID instead of new STID to protect the MAC Address of AMS by AAI_RNG-RSP message to AMS.

In step S514, AMS can use STID and the 2nd T-ABS normally exchange message of distribution.

Fig. 6 be illustrate according to another illustrative embodiments of the present invention when AMS performing to the figure of the signal stream of the method for the HO of neighbours ABS during failure in the HO of T-ABS.

Fig. 6 illustrates the method for the STID being exclusively used in AMS when the AMS network performed under not controlled HO situation for target ABS reenters by target ABS efficient allocation.When shown in Fig. 6, perform the not controlled HO of the Class1 with reference to figure 3 description.

The STID being assumed to be 2 is in figure 6 assigned to AMS, and the BSID of S-ABS is 3, the T-ABS in candidate ABS and the 2nd T-ABS have respectively be 4 BSID and be 5 BSID.

With reference to figure 6, in step S610, AMS can send AAI_HO-REQ message to initiate HO to S-ABS.

Step S601 can only perform when the HO that AMS initiates, and does not perform when the HO that ABS initiates.In other words, according to HO situation, step S601 is optional.

The S-ABS of BSID=3 can send the AAI_HO-REQ message of the AMS information comprised about AMS to one or more candidate ABS.Simple in order to annotate, suppose that S-ABS is to a T-ABS transmission HO-REQ message of BSID=4 in step S602.

In step S603, a T-ABS can send to S-ABS the HO-RSP message that the network being included in AMS reenters the HO information of middle use via backbone network, and HO information is such as special ranging code, ranging opportunity, behavioral parameters, UAI/AI etc.

In step s 604, S-ABS can send to AMS and comprise HO information and the AAI_HO-CMD message about the candidate ABS (such as BSID=4) recommended.

When AMS intention performs the HO to the T-ABS being different from the candidate ABS that S-ABS recommends, in step s 605, it can send the AAI_HO-IND message of the information comprised about preferred T-ABS (such as BSIS=5) to S-ABS.In AAI_HO-IND message, event code can be set to 2 (codes 2).

Therefore S-ABS can recognize that the T-ABS of AMS intention execution HO is the 2nd T-ABS.Therefore, upon request by a user, S-ABS can provide AMS information by resetting Resource Holding Timer to the 2nd T-ABS.

AMS can move in the cell area of the 2nd T-ABS of its preferred BSID=5, and receives the leading or SFH from the 2nd T-ABS periodic broadcast.That is, in step S606, AMS can use leading or SFH obtains and the downlink synchronization of the 2nd T-ABS.

In step S607, after downlink synchronization obtains, AMS can send the CDMA ranging code based on competition to the 2nd T-ABS in ranging opportunity the earliest, reenters with the network performed for the 2nd T-ABS.

Once receive the CDMA ranging code based on competition, the 2nd T-ABS can to AMS Resources allocation district, and the network that AMS is performed for the 2nd T-ABS in resource-area reenters.Information about the resource-area distributed can be included in CDMA and distribute in IE.In step S608, the 2nd T-ABS can send to AMS the AAI_RNG-RSP message comprising CDMA and distribute IE.

In step S609, AMS can distribute in the resource-area of the distribution of IE instruction to the 2nd T-ABS transmission AAI_RNG-REQ message at CDMA.AAI_RNG-REQ message can comprise old S-ABS BSID (=3) and in old S-ABS the STID (=2) of the last AMS used.

Once receive AAI_RNG-REQ message from AMS, the BSID that the 2nd T-ABS can be arranged from AAI_RNG-REQ message learns the old S-ABS of AMS.Therefore, in step S610, the 2nd T-ABS can correspond to the AMS information of the STID of AMS to S-ABS request.

Once receive AMS association requests from the 2nd T-ABS within the period being set to Resource Holding Timer, in step s 611, S-ABS can send the AMS information relevant to AMS to the 2nd T-ABS.AMS information can comprise the MAC Address of AMS, information about the basic capacity of AMS, security parameter (such as, security performance, AK etc.) and current at least one.

In step S612a and S612b, security parameter that the 2nd T-ABS can use its to share, current, AK etc. carry out certification AMS.

In step S613, the 2nd T-ABS can use the AAI_RNG-RSP message comprising and be exclusively used in the new STID of AMS, the current of renewal etc. to AMS response AAI_RNG-REQ message.AAI_RNG-RSP message can also be included in effective CMAC tuple in the 2nd T-ABS.

If perform the verification process of step S612a and S612b after HO ranging process, then the 2nd T-ABS can send interim STID instead of new STID, to protect the MAC Address of AMS by AAI_RNG-RSP message to AMS.

In step S614, AMS can use the STID of distribution or interim STID and the 2nd T-ABS normally exchange message.

Fig. 7 be illustrate according to another illustrative embodiments of the present invention when AMS performing to the figure of the signal stream of the method for the not controlled HO of neighbours ABS during failure in the HO of T-ABS.

Not controlled HO shown in Fig. 7 is similar to the not controlled HO shown in Fig. 6.Therefore, the description of step S701 to S705 can be replaced with the description of the step S601 to S605 of Fig. 6.

With reference to figure 7, receive AAI_HO-IND message once in step S705 from AMS, S-ABS can recognize that the T-ABS of AMS intention execution HO is the 2nd T-ABS.Therefore, in step S706, S-ABS can send to preferred 2nd T-ABS of AMS the HO-REQ message comprised about the AMS information of AMS and/or the ID (BSID=3) of S-ABS via backbone network.AMS information can comprise the MAC Address of AMS context, STID, information, security information and AMS about the basic capacity of AMS.

Once receive HO-REQ message from S-ABS, the 2nd T-ABS can store AMS information and reach scheduled time slot.

AMS can move in the cell area of the 2nd T-ABS of its preferred BSID=5, and receives the leading or SFH from the 2nd T-ABS periodic broadcast.That is, in step S707, AMS can use leading or SFH obtains and the downlink synchronization of the 2nd T-ABS.

In step S708, after downlink synchronization obtains, AMS can send the CDMA ranging code based on competition to the 2nd T-ABS in ranging opportunity the earliest, reenters with the network performed for the 2nd T-ABS.

Once receive the CDMA ranging code based on competition, the 2nd T-ABS to AMS Resources allocation district, can make AMS perform in resource-area and reenters the network of the 2nd T-ABS.Information about the resource-area distributed can be included in CDMA and distribute in IE.In step S709, the 2nd T-ABS can send to AMS the AAI_RNG-RSP message comprising CDMA and distribute IE.

In step S710, AMS can distribute in the resource-area of the distribution of IE instruction to the 2nd T-ABS transmission AAI_RNG-REQ message at CDMA.AAI_RNG-REQ message can comprise old S-ABS BSID (=3) and in old S-ABS the STID (=2) of the last AMS used.

Once receive AAI_RNG-REQ message from AMS, the 2nd T-ABS can by by step S706 receive and access AMS information and/or BSID and arrange in AAI_RNG-REQ message be 3 BSID and be 2 STID compare to obtain AMS information (such as MAC Address).

Therefore, in step S711a and S711b, the 2nd T-ABS and AMS can perform certification and without the need to additional process.

In step S712, the 2nd T-ABS can use to comprise and be exclusively used in the new STID of AMS, the current of renewal etc. to AMS response AAI_RNG-REQ message.AAI_RNG-REQ message can also be included in effective CMAC tuple in the 2nd T-ABS.

If perform the verification process of step S711a and S711b after HO ranging process, then the 2nd T-ABS can send interim STID instead of new STID, to protect the MAC Address of AMS by AAI_RNG-RSP message to AMS.

In step S713, AMS can use STID and the 2nd T-ABS normally exchange message of distribution.

Fig. 8 be illustrate according to another illustrative embodiments of the present invention when AMS performing to the figure of the signal stream of the method for the HO of neighbours ABS during failure in the HO of T-ABS.

Fig. 8 is substantially based on the hypothesis identical with Fig. 6.Therefore, the description of the step S801 to S805 of Fig. 8 can be replaced with the description of the step S601 to S605 of Fig. 6.

With reference to figure 8, in step S806, the S-ABS of BSID=3 can send the HO-REQ message of the AMS information comprised about AMS to the 2nd T-ABS of BSID=5.

In step S807, the 2nd T-ABS can send to S-ABS the HO-RSP message that the network being included in AMS reenters the HO information of middle use via backbone network, HO information be such as special ranging code, ranging opportunity, operate time parameter, UAI/AI etc.

In step S808, S-ABS can send to AMS the AAI_HO-CMD message comprising the HO information of reception.

AMS can move in the cell area of the 2nd T-ABS of its preferred BSID=5, and receives the leading or SFH from the 2nd T-ABS periodic broadcast.That is, in step S809, AMS can use leading or SFH obtains and the downlink synchronization of the 2nd T-ABS.

In step S810, AMS can be used in special ranging code that the HO information that receives in step S808 comprises and ranging opportunity sends CDMA ranging code to the 2nd T-ABS.

Ranging process in step S811 to S817 below between AMS and the 2nd T-ABS is identical with the step S608 to S614 of Fig. 6.Therefore, for step S811 to S817, with reference to figure 6.

Fig. 9 is the block diagram of AMS and ABS for performing the illustrative embodiments of the present invention shown in Fig. 2 to 8 according to another illustrative embodiments of the present invention.

AMS can be operating as transmitter on uplink, is operating as receiver on the uplink.ABS can be operating as receiver on uplink, is operating as transmitter on the uplink.

AMS and ABS can comprise transmission (Tx) module 940 and 950 respectively, and comprises reception (Rx) module 960 and 970 respectively, with the transmission of control information, data and/or message and reception.And, AMS and ABS can comprise respectively send and receive information, the antenna 900 and 910 of data and/or message.AMS and ABS can also comprise the processor 920 and 930 for performing above-mentioned illustrative embodiments of the present invention respectively, and comprises the memory 980 and 990 for information that is interim or that produce during being permanently stored in the operation of processor 920 and 930 respectively.

Especially, each in processor 920 and 930 can comprise HO module for performing HO process according to an illustrative embodiment of the invention, for encrypting the encrypting module (or device) of the timer message of predetermined number and/or the decoder module (or device) for explaining encrypting messages.And AMS and ABS shown in Fig. 9 all can also comprise low-power radio frequency/intermediate frequency (RF/IF) module.

Tx and the Rx module 940 to 970 of AMS and ABS can implement grouping modulation and demodulation, high speed packet channel coding, OFDM (OFDMA) packet scheduling and/or channel multiplexing, for transfer of data.

The processor 920 and 930 of AMS and ABS can perform for the controlling functions of not controlled HO according to the present invention, HO function, certification and encryption function, variable mac frame controlling functions, real time high-speed flow control function and/or MODEM controlling functions in real time.

Device shown in Fig. 9 can realize the method described referring to figs. 1 to 8.Illustrative embodiments of the present invention can use assembly and the functional realiey of AMS and ABS device.

The processor 920 of AMS can be monitored before this with reference to the HO condition that Fig. 1 and 2 describes.If meet HO to initiate condition, then processor 920 comprises AMS information about AMS in AAI_HO-REQ message, and control Tx module 940 sends AAI_HO-REQ message by antenna 900 to S-ABS.

The Rx module 960 of AMS can receive AAI_HO-CMD message from S-ABS, and this message is provided to processor 920.Processor 920 can store the HO information be included in AAI_HO-CMD message in memory 980, and operates based on HO information and executing HO.

The processor 920 of AMS can determine whether to perform above-mentioned controlled or not controlled HO.Hypothesis performs not controlled HO in an exemplary embodiment of the present invention embodiment.Therefore, AMS can make purpose processor 920, Tx module 940 and antenna 900 send AAI_HO-IND message to ABS.

The network for T-ABS that AMS can make the HO module of purpose processor 920 perform description in Fig. 3 to 8 reenters, and is sent by Tx module 940, Rx module 960 and antenna 900 and received related news.Control HO process is responsible for by processor 920.

The Rx module 970 of S-ABS can provide to processor 930 the HO-REQ message and/or HO-IND message that are received by antenna 950.Processor 930 can store AMS information in memory 990, and is sent the AAI_HO-CMD message comprising HO information to AMS by Tx module 950.

What T-ABS can use its antenna, Tx module and Rx module execution to describe with reference to figure 3 to 8 reenters process with the network of AMS.That is, T-ABS can make the HO module management HO process of purpose processor, and to/from AMS sending/receiving for realizing the message needed for HO process.

Meanwhile, MS or AMS can be any one in personal digital assistant (PDA), cell phone, personal communication service (PCS) phone, global system for mobile communications (GSM) phone, Wideband Code Division Multiple Access (WCDMA) (WCDMA) phone, mobile broadband system (MBS) phone, Hand held PC, PC on knee, smart phone, multimode multi-band (MM-MB) terminal etc.

Smart phone is the terminal of the advantage simultaneously adopting mobile phone and PDA.The function (that is, scheduling and data communication, such as fax sends and is connected with reception and the Internet) of PDA is incorporated in mobile phone by it.MB-MM terminal refers to and is built-in with Multimodem chip and the terminal that can operate in any system in Mobile Internet system and other mobile communication system (such as CDMA-2000, WCDMA etc.).

Illustrative embodiments of the present invention can be realized by various mode, such as, is realized by hardware, firmware, software or its combination.

In hardware configuration, according to an illustrative embodiment of the invention can by realizations such as one or more application-specific integrated circuit (ASIC) (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessors for the method sending uplink signal.

In firmware or software merit rating, method according to an illustrative embodiment of the invention can realize with the form such as module, process, function performing above-mentioned functions or operation.Such as, software code can be stored in memory 980 and 990, and is performed by processor 920 and 930.Memory bit is inner or outside in processor, and can send/receive data via various known way to/from processor.

It will be understood by those skilled in the art that the present invention can implement to be different from other ad hoc fashions mentioned herein, and do not depart from spirit of the present invention and intrinsic propesties.Therefore above-mentioned execution mode should be interpreted as illustrative and nonrestrictive in all respects.Scope of the present invention should be determined by claims and their legal equivalents, but not is determined by above-mentioned explanation, and all changes dropped in the meaning of claims and equivalency range are intended to be included therein.To those skilled in the art, clearly, do not have the claim of specific reference to form in the following claims each other and present, using as illustrative embodiments of the present invention, or the subsequent modification after being submitted to by application is included, using as new claim.

Industrial applicability

Illustrative embodiments of the present invention can be applicable to various wireless access system.Such as, wireless access system is 3GPP system, 3GPP2 system and/or IEEE 802.xx system.Except wireless access system, illustrative embodiments of the present invention can be applicable to all technical fields of wireless access system application.

Claims (16)

1., for performing a method for not controlled switching in mobile station MS, the method comprises:

Whether determined the Resource Holding Timer time-out of serving BS by MS, wherein Resource Holding Timer indicates described serving BS to keep the contextual time of described MS;

If Resource Holding Timer does not have time-out, then during the network for target BS TBS reenters process, distance measurement request message is sent to described target BS, the base station identifier that this distance measurement request message comprises described serving BS and the station identification symbol for identifying described MS used in described serving BS by described MS; And

In response to described distance measurement request message; ranging response message is received from described TBS by described MS; this ranging response message comprises security information and for the protection of the temporary staging identifier of the location privacy of described MS or the new station identification symbol for being identified described MS by described TBS

Wherein said distance measurement request message and described ranging response message are used for not controlled switching.

2. method according to claim 1, before described TBS, be wherein confirmed as the preferred TBS of described MS and the candidate base station that described TBS is not described serving BS to be recommended time, or when described MS can not arrive any candidate base station of described serving BS recommendation, trigger not controlled switching.

3. method according to claim 2, the method also comprises:

Receive switching command message from described serving BS, this switching command message comprises handover information and the information about candidate base station.

4. method according to claim 3, the method also comprises:

Send switch indicating information by described MS to described serving BS, this switch indicating information comprises the event code of the beginning of the not controlled switching of instruction and described TBS is identified as the identifier of preferred TBS of described MS.

5. method according to claim 2, the method also comprises:

Send ranging code from described MS to described TBS and reenter process to perform network; And

Receive ranging message by described MS from described TBS, as the response to described ranging code, this ranging message comprises the assignment information about the resource-area distributed for ranging process,

Wherein in the resource-area indicated by described assignment information, send described distance measurement request message.

6. method according to claim 2, wherein said ranging response information also comprises the message authentication code CMAC tuple based on ciphertext.

7., in mobile station MS, the method performing not controlled switching between serving BS SBS and target BS TBS, the method comprises:

During network reenters process, receive distance measurement request message at TBS place from MS, the base station identifier that this distance measurement request message comprises SBS and the station identification symbol for identifying described MS used in described SBS; And

In response to described distance measurement request message, send ranging response message by described TBS to described MS, this ranging response message comprises security information and for being accorded with by the new station identification of MS described in described target BS identification,

Wherein said distance measurement request message and described ranging response message are used for not controlled switching.

8. method according to claim 7, before described TBS, be wherein confirmed as the preferred TBS of described MS and the candidate base station that described TBS is not described SBS to be recommended time, or when described MS can not arrive any candidate base station of described SBS recommendation, trigger not controlled switching.

9. method according to claim 8, the method also comprises:

Receive ranging code at described TBS place from described MS, reenter process to perform network; And

Send ranging message from described TBS to described MS, as the response to described ranging code, this ranging message comprises the assignment information about the resource-area distributed for ranging process,

Wherein in the resource-area indicated by described assignment information, send described distance measurement request message.

10. method according to claim 8, wherein security information comprises the message authentication code CMAC tuple based on ciphertext.

11. 1 kinds for performing the mobile station MS of not controlled switching, this MS comprises:

For determining the device whether Resource Holding Timer of serving BS is overtime, wherein Resource Holding Timer indicates described serving BS to keep the contextual time of MS;

If for Resource Holding Timer do not have time-out, during the network for target BS TBS reenters process, send the device of distance measurement request message to described target BS, the base station identifier that this distance measurement request message comprises described serving BS and the station identification symbol for identifying described MS used in described serving BS; And

For receiving the device of ranging response message from TBS in response to described distance measurement request message; this ranging response message comprises security information and for the protection of the temporary staging identifier of the location privacy of described MS or the new station identification symbol for being identified described MS by described TBS

Wherein said distance measurement request message and described ranging response message are used for not controlled switching.

12. travelling carriages according to claim 11, before described TBS, be wherein confirmed as the preferred TBS of described MS and the candidate base station that described TBS is not described serving BS to be recommended time, or when described MS can not arrive any candidate base station of described serving BS recommendation, trigger not controlled switching.

13. travelling carriages according to claim 12, this travelling carriage also comprises:

For receiving the device of switching command message from described serving BS, this switching command message comprises handover information and the information about candidate base station.

14. travelling carriages according to claim 12, this travelling carriage also comprises:

For sending the device of switch indicating information to described serving BS, this switch indicating information comprises the event code of the beginning of the not controlled switching of instruction and described target BS is identified as the identifier of selected objective target base station of described MS.

15. travelling carriages according to claim 12, this travelling carriage also comprises:

For sending ranging code to perform the device that network reenters process to described TBS, and

For receiving the device of ranging message as the response to described ranging code from described TBS, this ranging message comprises the assignment information about the resource-area distributed for ranging process, and

Wherein in the resource-area indicated by described assignment information, send described distance measurement request message.

16. travelling carriages according to claim 12, wherein said security information comprises the message authentication code CMAC tuple based on ciphertext.