CN103650598A

CN103650598A - Apparatus and method of inter-radio access technology searching

Info

Publication number: CN103650598A
Application number: CN201280034117.0A
Authority: CN
Inventors: A·D·汉德卡尔; 侯纪磊; Q·陈; 朱西鹏; J·张
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2011-05-25
Filing date: 2012-05-25
Publication date: 2014-03-19

Abstract

Aspects of radio access technology searching include apparatus and methods for obtaining relative synchronization information between a first radio access technology and a second radio access technology, and determining a time location of a pilot signal of the second radio access technology based on the relative synchronization information. Further aspects include searching for the pilot signal of the second radio access technology using the determined time location. Other aspects further include determining a measurement gap duration and measurement gap location based on the relative synchronization information so as to encompass a pilot of the second radio access technology.

Description

For the apparatus and method of searching between wireless access technology

Prioity claim based on 35U.S.C. § 119

Present patent application requires to enjoy in U.S. Provisional Application No.61/489 that on May 25th, 2011 submits to, that title is " APPARATUS AND METHOD OF INTER-RADIO ACCESS TECHNOLOGY SEARCHING ", 969 priority, and on June 17th, 2011, submit to, title is the priority of the international application No.PCT/CN2011/075857 of " APPARATUS AND METHOD OF INTER-RADIO ACCESS TECHNOLOGY SEARCHING "; Above-mentioned two assignees that application has transferred the application, therefore be incorporated to above-mentioned two applications clearly herein with way of reference.

Technical field

The application's each side is usually directed to wireless communication system, and more particularly, relates to the apparatus and method that wireless access technology is searched for.

Background technology

Dispose widely cordless communication network, to various communication services are provided, such as phone, video, data, message transmission, broadcast etc.These networks (it is multi-access network normally) can by share can with Internet resources support a plurality of users' communication.An example of this network is universal terrestrial access network (UTRAN).UTRAN is the Radio Access Network (RAN) that is defined as a part for Universal Mobile Telecommunications System (UMTS) (it is the third generation (3G) mobile phone telephony that third generation partner program (3GPP) is supported).It is the successor of global system for mobile communications (GSM) technology for UMTS() support at present various air-interface standards, for example Wideband Code Division Multiple Access (WCDMA) (W-CDMA), TD-CDMA Time Division-Code Division Multiple Access (TD-CDMA) and Time Division-Synchronous Code Division Multiple Access (TD-SCDMA).For example, TD-SCDMA is carrying out as the basic air interface in UTRAN framework in China, and using its existing GSM infrastructure as core net.UMTS is support of enhanced 3G data communication protocol also, high speed downlink packet access (HSDPA) for example, and this HSDPA provides higher data transmission bauds and capacity to the UMTS network being associated.

Along with the demand of mobile broadband access is constantly increased, research and development continues to improve UMTS technology, to not only meet the increased requirement to mobile broadband access, and improves and strengthens the user of mobile communication is experienced.

For example, such as when expectation is switched or reselected, a problem relates to and finds alternative wireless access technology.The timing of base station (or Node B, eNodeB etc.) is normally unknown.So, subscriber equipment may carry out the system acquisition search of complete based on many different hypothesis, and this may be very consuming time.In order to reduce time delay, some system acquisition search comprise than complete search search still less.But, in any system acquisition search, all there is trading off between undetected and false-alarm.

Therefore, to system acquisition, search improves in expectation.

Summary of the invention

For one or more aspects being had to a basic understanding, provided the simplified summary to these aspects below.Content part of the present invention is not the exhaustive overview to all contemplated aspects, and neither be intended to identify key or the important element of all aspects, neither be intended to describe the scope of any or all of aspect.Its sole purpose is by the form of simplifying, to present some design concepts of one or more aspects, usings this as the prelude being described in more detail providing below.

In aspect of the application, a kind of wireless access technology searching method comprises: by processor, obtain the relative synchronizing information between the first wireless access technology and the second wireless access technology; And the time location of determining the pilot signal of described the second wireless access technology based on described relative synchronizing information.In addition, aspect carry out at subscriber equipment one in, described method can comprise: with determined time location, the described pilot signal of described the second wireless access technology is searched for.

One or more relevant aspects can comprise: comprise the computer program of non-temporary computer readable medium, described non-temporary computer readable medium has for carrying out the code of the action of said method; Comprise for carry out said method one or more modules, for the device of radio communication; Or, comprise at least one processor and be coupled to described at least one processor memory, for the device of radio communication, wherein, described at least one processor is configured to carry out the action of said method.

In one aspect of the method, after the relative synchronizing information of obtaining between described the first wireless access technology and described the second wireless access technology, described method can comprise: based on described relative synchronizing information, determine measurement clearance duration and measurement clearance position, so that the pilot tone that comprises described the second wireless access technology.In some cases, the described aspect of the method can be carried out by network entity, but is not limited to network entity.

In order to realize aforementioned and relevant object, one or more aspects comprise below fully describe and claim in the feature specifically noted.Below description and accompanying drawing are described some example feature of one or more aspects in detail.But these features have only shown wherein can to adopt the certain methods in the whole bag of tricks of principle of each side, and this specification is intended to comprise all these aspects and equivalent thereof.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, disclosed aspect is described, it is that wherein, identical Reference numeral represents identical element for disclosed aspect is described and unrestricted that accompanying drawing is provided, and wherein:

Fig. 1 is the schematic diagram of the aspect of the system for searching between wireless access technology;

Fig. 2 is the figure of the relative timing in the first wireless access technology and the second wireless access technology;

Fig. 3 is the block diagram of describing the example of the frame structure telecommunication system from conceptive;

Fig. 4 means the figure that comprises the form of relative synchronizing information or the aspect of relational database structure;

Fig. 5 is the schematic block diagram of the aspect of capture component and optional associated component;

Fig. 6 is the flow chart of the aspect of the method for searching between the wireless access technology of being carried out by subscriber equipment;

Fig. 7 is the block diagram of describing the example of telecommunication system from conceptive;

Fig. 8 is depicted in from conceptive the block diagram that Node B telecommunication system and UE communicate; And

Fig. 9 is the flow chart of the aspect of the method for searching between the wireless access technology of being carried out by network entity.

Embodiment

Detailed description below in conjunction with accompanying drawing is intended to the explanation as various configurations, rather than wants to show that design concept described herein only can pass through these Configurations.For the object providing the complete understanding of various design concepts, describe in detail and comprise detail.Yet, to those skilled in the art, obviously in the situation that there is no these details, can not implement these design concepts yet.For fear of these design concepts, fog, in some examples, known structure and parts illustrate with block diagram form.

With reference to Fig. 1, can provide an aspect of the system 10 of searching between comparatively faster wireless access technology to comprise subscriber equipment (UE) 12, this subscriber equipment (UE) 12 and the first wireless access technology (RAT1) node 14 communicate and thirst for catching the second wireless access technology (RAT2) node 16.For example, UE12 may want to catch RAT216 and carries out the action such as, but not limited to circuit switched fallback, session switching or idle mode cell gravity treatment and so on.In addition, for example, RAT114 and RAT216 can be used as synchronous radio access technology and operate.

In one aspect, UE12 comprises capture component 18, and this capture component 18 obtains the relative synchronizing information 20 between RAT114 and RAT216.For example, synchronizing information 20 can include but not limited to the relative pilot frequency deviation 22 between the pilot signal 23 of RAT114 and the pilot signal 25 of RAT216 relatively.

In addition, in one aspect, capture component 18 can comprise pilot tone timi requirement device 24, and this pilot tone timi requirement device 24 comprises: consider synchronizeing between RAT114 and RAT216, to determine the algorithm of time location 26 of the pilot signal 25 of RAT216 based on relative synchronizing information 20.For example, when UE12 and RAT114 communicate, pilot tone timi requirement device 24 is known the sequential of the pilot signal 23 of RAT114, thereby can carry out this algorithm to determine the estimated value of time location 26 of the pilot signal 25 of RAT216 based on relative pilot frequency deviation 22.

In addition, capture component 18 can comprise searcher 28, and these searcher 28 operation communication assemblies 30 are with pilot signal 25 that service time, RAT216 was searched in position 26.For example, the receiver section that searcher 28 can operation communication assembly 30 so that comprise time location 26 duration be tuned to the frequency corresponding with the pilot signal 25 of RAT216.

Therefore, as compared for the holonomic system acquisition search of the pilot signal 25 of RAT216 with execution, the apparatus and method of system 10 and UE12 allow by adopting relative synchronizing information 20 to help the pilot signal 25 of RAT216 to position, thereby reduce the possibility of search.For example, holonomic system acquisition search can adopt 8 measurement clearance, and can adopt one or two measurement clearance by the application's the defined improved search in aspect.Result, the apparatus and method of system 10 and UE12 can provide the capture time of relative very fast (as compared with the conventional method), thereby the time decreased that the search of the pilot signal 25 based on to RAT216 spends with measurement reduces the time delay when setting up with the communicating by letter of RAT216, thereby has also improved the resource utilization to RAT112.

With reference to Fig. 2, can be with reference to sequential Figure 34 corresponding with RAT114 and sequential Figure 36 corresponding with RAT216, an example (it should not be interpreted as restrictive) of the use-case of the system 10 of further key-drawing 1.Particularly, communications component 30(Fig. 1) according to sequential Figure 34 and RAT114, communicate, sequential Figure 34 comprises the one or more transmissions corresponding with RAT114 and/or receiving cycle 38 and the one or more measurement clearance 40 that occur in time according to the given cycle 42.Each measurement clearance 40 comprises one or more time locations 26, and for example, described time location 26 can comprise Fig. 1 by pilot tone timi requirement device 24() definite duration, to align with corresponding one or more pilot signals 25 of RAT216.According to relative pilot frequency deviation 22, each pilot signal 25 of RAT216 relevant with one of corresponding one or more pilot signals 23 of RAT114 (although for the sake of simplicity, only having described a pilot frequency deviation 22 in Fig. 2).For example, in one aspect, a plurality of pilot signals 23 of RAT114 have pilot period 44, and a plurality of pilot signals 25 of RAT216 have pilot period 46, and pilot tone timi requirement device 24(Fig. 1) relative pilot frequency deviation 22 is applied to each pilot signal in a plurality of pilot signals 23 of RAT114, to determine the corresponding a plurality of time locations 26 of each pilot signal in a plurality of pilot signals 25 with RAT216.Note, in some cases, pilot period 44 and pilot period 46 can be the identical time cycles, and in other situation, pilot period 44 and pilot period 46 can be the different time cycles.

In addition, it should be noted each pilot signal in a plurality of pilot signals 25 that duration 48 of each time location 26 comprises RAT216.In one aspect, for example, pilot tone timi requirement device 24 can calculating prolongeding time 48, to can provide time enough to make communications component 30 set up receiver, each pilot signal in a plurality of pilot signals 25 of RAT216 is measured.In addition, for example, pilot tone timi requirement device 24 can calculating prolongeding time 48, to comprise apart from certain time quantum before or after the special time skew of time of each pilot signal 23, to allow the mistake in the drift of pilot signal 23 or the calculating of time location 26.

In addition, for example, in certain aspects, can the part using each pilot signal in a plurality of pilot signals 25 of RAT216 as subframe 50 send, wherein subframe 50 can have the given cycle 52.

With reference to Fig. 3, for example, in should not being interpreted as a restrictive specific use-case, RAT216(Fig. 1 and Fig. 2) can be TD-SCDMA technology, and each pilot signal in a plurality of pilot signals 25 of RAT216 can be sent as a part with the carrier wave of frame structure 60.As shown in the figure, TD-SCDMA carrier wave has the frame 62 that length is 10 milliseconds (ms).Frame 62 for example has two 5ms subframe 64(, similar or identical with the subframe 40 in Fig. 2), and each subframe in subframe 64 comprises that seven time slot TS0 are to TS6.Conventionally distribute the first time slot TS0 for downlink communication, and conventionally distribute the second time slot TS1 for uplink communication.Remaining time slot (TS2 is to TS6) can, for up link or down link, allow to have greater flexibility during the higher data transmission time in uplink direction or down link direction like this.Down link pilot timeslot (DwPTS) 66, protective time slot (GP) 68 and uplink pilot time slot (UpPTS) 70(are also referred to as uplink pilot channel (UpPCH)) between TS0 and TS1.Each time slot (TS0-TS6) can allow logarithm on maximum 16 encoding channels to be reportedly input into capable multiplexing.Transfer of data on encoding channel comprise by two data divisions 72 separating of leading code (midamble) 74, and and then protective time slot (GP) 76 below.Middle leading code 74 can be for the feature such as channel estimating, and GP76 can disturb between burst for avoiding.

With reference to Fig. 4, in aspect should not being interpreted as restrictive one, relatively synchronous 20(is also referring to Fig. 1) can be stored in UE12(Fig. 1 with the form of the data in form or relational database 80) upper, wherein said data definition a pair of wireless access technology 82 identified and relative pilot offset values 84 accordingly.It should be noted, form or relational database 80 can comprise that any amount of wireless access technology is to 82, and it comprises combination in any (for example, technology is from 1 to n, and wherein n is positive integer) and the corresponding pilot offset values 84 relatively of two wireless access technologys.

In certain aspects, the relative synchronizing information 20 between two wireless access technologys can be frequency band special use.For example, at least two wireless access technologys in a plurality of wireless access technologys 86 in form or relational database 80, can comprise any quantity n in band index 88.Therefore, the relative synchronizing information 20 in this aspect can comprise the band index value 90 and corresponding relative pilot offset values 92 of a pair of sign.

Alternatively or additionally, the relative synchronizing information 20 between two wireless access technologys can be position-specific.For example, for at least two wireless access technologys in a plurality of wireless access technologys 86 in form or relational database 80, the relative synchronizing information 20 in this aspect can comprise: have the positional information 94 of positional value 96 and the band index value 98 of a pair of sign and corresponding relative pilot offset values 100.It should be noted, positional information 94 can comprise definition UE12(Fig. 1) orientation and/or data position, any type, for example latitude and longitude, one or more network node (for example, base station, eNodeB, Network Access Point etc.) identifier etc.UE12(Fig. 1) can be for example, for example, via in conjunction with satellite-based system (, global positioning system (GPS)) the position/location assembly or for example, on the UE12 that operates of the system based on ground network (, cellular system) or the combination of the two obtains positional information 94.In other words, positional information 94 generally can be on UE12 locally produces, from network entity, obtains or the two certain combination.

With reference to Fig. 5, this should not be interpreted as restrictive aspect in, capture component 18(is also referring to Fig. 1) can comprise one or more extra assemblies, or can communicate with one or more extra assemblies.For example, as mentioned above, in one aspect in, can trigger 102 based on receiving or detect mobility, trigger capture component 18 to carry out aforesaid operations.For example, mobility triggers 102 and can include but not limited to that the switching of one or more circuit switched fallbacks, communication session and/or calling or idle mode cell reselect.In addition, for example, mobility triggers 102 can be by UE12(Fig. 1) on mobility assembly 104 generate, and/or from UE12(Fig. 1) mobility assembly 104 receive.For example, mobility assembly 104 can comprise the one or more of hardware, software, firmware and/or algorithm for maintaining network service and agreement.

In addition, in one aspect in, capture component 18 can also comprise operation for example, to maintain in (, form or relational database 80(Fig. 4)) current and effective synchronizing information 20(Fig. 1) and renovator assembly 106.In one aspect, renovator assembly 106 can comprise for obtaining search to relative synchronizing information 20(Fig. 1 with once in a while and/or periodic total system) hardware, software, firmware and/or the algorithm that upgrade and agreement one or more.For example,, as UE12(Fig. 1) reside in RAT114(Fig. 1) when upper, can with relatively low cycle (for example every a few minutes once) carry out once in a while and/or periodic holonomic system acquisition search.Thereby the relatively low cycle can comprise long enough, the battery life of UE12 is had to relatively little impact, thereby and enough shortly again maintains relatively new and effective relative synchronizing information 20(Fig. 1), circulation timei interval.Therefore, relatively low periodic quantity can be can be by wireless carriers/supplier, and/or UE12(Fig. 1) or manufacturer's configuration of its part (for example, capture component 18).

In addition, as pointed above with reference to Fig. 4, capture component 18 can with UE12(Fig. 5) on position/location assembly 114(Fig. 5) communicate.Position/location assembly 114 can comprise for determining or receiving position information 94(Fig. 4) hardware, software, firmware and/or algorithm and agreement one or more.

With reference to Fig. 6, in operation, subscriber equipment can be carried out the method 120 of wireless access technology search.In one aspect, for example, method 120 comprises: by subscriber equipment, obtain the relative synchronizing information (square frame 122) between the first wireless access technology and the second wireless access technology.For example, in one aspect in, capture component 18 can be from maintaining or be otherwise stored in UE12(Fig. 1) memory form or relational database in obtain relative synchronizing information.For example, can to UE12, carry out by relative synchronizing information pre-configuredly, or can by aerial (for example,, from network or system message), obtain relatively synchronous via receiver or transceiver.In addition, in one aspect in, relatively synchronizing information can be frequency band special use, for example the different frequency bands special use of the first wireless access technology and the second wireless access technology (for example, the RAT114 of Fig. 1 and RAT216).Alternatively or additionally, in one aspect in, synchronizing information can be (current location (Fig. 1) that for example, depends on UE12) of position-specific relatively.

In addition, method 120 comprises: the time location (square frame 124) of determining the pilot signal of the second wireless access technology based on relative synchronizing information.For example, in one aspect in, pilot tone localizer assembly 24(Fig. 1) can carry out to determine RAT216(Fig. 2) one or more pilot signal 25(Fig. 2) time location 26(Fig. 2).Alternatively, in one aspect in, determine and can also comprise obtaining and/or determining the thering is measurement clearance that the duration reduces, the described duration is based on according to synchronizing information and definite time location.For example, as discussed in more detail below, in aspect this, UE12 or capture component 18 or certain network entity can also comprise the position of measurement clearance and the gap determiner 108(Fig. 1 of duration that has size reduction for determining).

In addition, method 120 comprises: with determined time location, the pilot signal of the second wireless access technology is searched for to (square frame 126).For example, in one aspect in, UE12(Fig. 1) and/or capture component 18(Fig. 1) can comprise for carrying out searcher assembly 28(Fig. 1 of search).In addition, in one aspect in, search is for example, by the first wireless access technology (, RAT114(Fig. 2)) measurement clearance (for example, measurement clearance 40(Fig. 2) of definition) in carry out.In addition, in one aspect in, compare with not using the search of relative synchronizing information, based on according to relative synchronizing information and the search that definite time location carries out needs less measurement clearance.Alternatively, in one aspect in, search can be triggered by mobility (such as but not limited to circuit switched fallback, switching, community, reselecting etc.) and trigger.Alternatively, in one aspect in, search can comprise: have that the duration reduces, obtain and/or definite measurement clearance in search for, the wherein said duration is based on according to synchronizing information and definite time location.For example, as discussed in more detail below, in aspect this, UE12 or capture component 18 or certain other network entity can also comprise the position of measurement clearance and the gap determiner 108(Fig. 1 of duration that has size reduction for determining).

Alternatively, method 120 can also comprise: based on according to relative synchronizing information and definite time location, the holonomic system acquisition search of carrying out described search is confirmed as failure (square frame 128).For example, in one aspect, UE12 and/or capture component 18 and/or searcher 28(Fig. 1) can comprise: the hardware, software, firmware, algorithm or the agreement that for example, for failure (, failed search) of definite search of carrying out based on determined time location, instruct subsequently holonomic system acquisition search.

In another kind is selected, method 120 can also comprise: with once in a while and/or periodic total system, obtain to search for and upgrade relative synchronizing information (square frame 130).For example, in one aspect, UE12 and/or capture component 18(Fig. 1) can comprise renovator 106(Fig. 8), described renovator 106 comprises: for come hardware, software, firmware, algorithm or the agreement of the search of complete system acquisition with periodic intervals once in a while.

With reference to Fig. 7, show the block diagram of the example of describing telecommunication system 700, wherein, one or more UE710(for example, the UE12 in Fig. 1) can operate.Running through the various designs that the application provides can realize in diversified telecommunication system, the network architecture and communication standard.For example, and unrestricted, the UMTS system of consulting and using TD-SCDMA standard provides the aspect of the application shown in Fig. 7.In this example, UMTS system for example comprises (wireless access network) RAN702(, and UTRAN), this RAN702 provides multiple wireless service, comprises that phone, video, data, message transmit, broadcast and/or other service.RAN702 can be divided into a plurality of RNSs (RNS), and (for example, RNS707), each RNS is for example, by (, RNC706) controlling such as radio network controller (RNC).For the sake of clarity, only show RNC706 and RNS707, still, except RNC706 and RNS707, RAN702 can also comprise RNC and the RNS of any amount.RNC706 be responsible for to distribute, reconfigures and discharges Radio Resource in RNS707 and other device.Can use any suitable transmission network, by various types of interfaces such as direct physical connection, virtual network, other RNC(that RNC706 is interconnected in RAN702 does not illustrate).

The geographic area that RNS707 can be covered is divided into a plurality of communities, and wherein, wireless transceivers devices Dui Ge serves community.Wireless transceivers devices is commonly called Node B in UMTS application, but can also be called base station (BS), base station transceiver (BTS), wireless base station, transceiver, transceiver function, Basic Service Set (BSS), extended service set (ESS), access point (AP) or certain other suitable term by those of ordinary skills.For the sake of clarity, there is shown two Node B 708; But RNS707 can comprise the radio node B of any amount.Node B 708 (for example, UE12) provides the WAP (wireless access point) of going to core net 704 to the mobile device of any amount.The other example of mobile device comprises the equipment of cell phone, smart phone, Session Initiation Protocol phone, laptop computer, notebook, net book, intelligence basis, PDA(Personal Digital Assistant), satellite radio devices, global positioning system (GPS) equipment, multimedia equipment, video equipment, digital audio-frequency player (for example, MP3 player), camera, game console or any other similar functions.As described, mobile device is commonly called subscriber equipment (UE) in UMTS application, but can also be called mobile radio station (MS), subscriber station, mobile unit, subscriber unit, radio-cell, remote unit, mobile device, wireless device, Wireless Telecom Equipment, remote equipment, mobile subscriber station, access terminal (AT), mobile terminal, wireless terminal, remote terminal, hand-held device, terminal, user agent, mobile client, client or certain other suitable term by those of ordinary skills.For illustration purpose, UE12 be shown as with Node B 708 at least one Node B communicate.Down link (DL) (it is also referred to as forward link) refers to the communication link from Node B to UE, and up link (UL) (it is also referred to as reverse link) refers to the communication link from UE to Node B.

As shown in the figure, core net 704 comprises GSM core net.But, as those of ordinary skills will be appreciated that, can in RAN or other suitable access network, realize and run through the various designs that the application provides, to be provided to the access of the core net dissimilar with GSM network to UE.

In this example, core net 704 support has mobile switching centre (MSC) 712 and gateway MSC(GMSC) 714 circuit switched service.One or more RNC(for example, RNC106) can be connected to MSC712.MSC712 is the device that call setup, call routing and UE mobility functions are controlled.MSC712 also comprises VLR Visitor Location Register (VLR) (not shown), and this VLR Visitor Location Register (VLR) is included in the user related information of duration that UE is arranged in the overlay area of MSC712.GMSC714 provides the gateway by MSC712 to UE, so that place in circuit switching network 716.GMSC714 comprises attaching position register (HLR) (not shown in FIG.), and this attaching position register (HLR) comprises user data, for example, and the data of the details of the service that reflection specific user has subscribed.HLRHai Yu authentication center (AuC) carries out association, and wherein this AuC comprises user's specific authentication data.When receive for particular UE calling time, GMSC714 inquires about to HLR, to determine the position of this UE, and calling is transmitted to the specific MSC that this position is served.

Core net 704 also uses Serving GPRS Support Node (SGSN) 718 and Gateway GPRS Support Node (GGSN) 720 to support packet data service.It represents general packet radio service GPRS() be designed to compare higher speed according to serving relevant available velocity with standard GSM circuit switched data, packet data service is provided.GGSN720 provides and being connected of packet-based network 722 for RAN102.Packet-based network 722 can be the Internet, private data network or certain other suitable packet-based network.A function of GGSN720 is to provide packet-based network to connect to UE12.By SGSN718 transmission of data packets between GGSN720 and UE12, wherein said SGSN718 substantially carries out the identical function of function of carrying out in circuit commutative field with MSC712 in packet-based territory.

UMTS air interface is spread spectrum direct sequence CDMA (DS-CDMA) system.Spread spectrum DS-CDMA is by multiplying each other with the sequence that is called the pseudo-random bits of chip, in much wide bandwidth, user data carried out to spread spectrum.TD-CDMA standard is based on this direct sequence spread spectrum skill, and requires time division duplex (TDD), rather than as the Frequency Division Duplexing (FDD) (FDD) of being used in many fdd mode UMTS/W-CDMA systems.For the up link (UL) between Node B 708 and UE12 and down link (DL), the two uses identical carrier frequency to TDD, but ul transmissions and downlink transmission are divided in the different time-gap in carrier wave.

With reference to Fig. 8, in one aspect in, in RAN300, Node B 310 communicates with UE350, wherein, RAN800 can be the RAT216 in Fig. 1, Node B 310 can be the RAT114 in Fig. 1, UE350 can be the UE12 in Fig. 1.In downlink communication, sending processor 820 can be from data source 812 reception data and from controller/processor 840 reception control signals.Sending processor 820 is that data and control signal and reference signal (for example, pilot signal) provide various signal processing functions.For example, sending processor 820 can provide Cyclic Redundancy Check code to carry out error detection occurs, encode and to interweave, to contribute to forward error correction (FEC), based on various modulation schemes (for example, binary phase shift keying (BPSK), Quadrature Phase Shift Keying (QPSK), M phase phase shift keying (M-PSK), M rank quadrature amplitude modulation (M-QAM) etc.) map to signal constellation (in digital modulation) figure, with Orthogonal Variable Spreading Factor OVSF (OVSF), carry out spread spectrum, and be multiplied by mutually and produce a succession of symbol with scrambled code.Controller/processor 840 can be used from the channel estimating of channel processor 844 and determine coding, modulation, spread spectrum and/or the scrambling scheme for sending processor 820.These channel estimating can be according to the reference signal being sent by UE850 or according to being included in from leading code 314(Fig. 3 in UE850) in feedback obtain.The symbol being generated by sending processor 820 is provided for and sends Frame Handler 830 to create frame structure.Send Frame Handler 830 by by these symbols and the middle leading code 314(Fig. 3 that carrys out self-controller/processor 840) carry out multiplexingly creating this frame structure, thus form a succession of frame.Then, these frames are offered to transmitter 832, described transmitter 832 provides various signal conditioning functions, comprises amplification, filtering and frame is modulated on carrier wave to carry out downlink transmission on wireless medium by smart antenna 834.Can control bidirectional self-adaptive aerial array or other similar beam technique is realized smart antenna 834 with wave beam.

At UE850 place, receiver 854 transmits by antenna 852 receiving downlinks, and processes this transmission, to recover to be modulated to the information on this carrier wave.The information that receiver 854 is recovered offers received frame processor 860, and received frame processor 860 is resolved each frame, and provides middle leading code 314(Fig. 3 to channel processor 894), to receiving processor 870, provide data, control and reference signal.Subsequently, the inverse operation of the performed processing procedure of the transmitting processor 820 in receiving processor 870 XM B810.More particularly, receiving processor 870 carries out descrambling and despreading to these symbols, determines the most possible signal constellation point being sent by Node B 810 subsequently based on modulation scheme.These soft-decisions can be based on being calculated by channel processor 894 channel estimation value.Subsequently, soft-decision is decoded and deinterleaving, to recover these data, control and reference signal.Subsequently, CRC code is carried out to verification, to judge whether that these frames have been carried out to successfully decoding.Subsequently, the entrained data of the frame being successfully decoded are offered to data sink 872, data sink 872 is illustrated in the application of for example, in UE850 and/or various user interface (, display) operation.The entrained control signal of the frame being successfully decoded is offered to controller/processor 890.When receiver processor 870 is not successfully decoded to frame, controller/processor 890 can also use confirmation (ACK) and/or Negative Acknowledgement (NACK) agreement to support the repeat requests to those frames.

In up link, the data from data source 878 and the control signal of carrying out self-controller/processor 890 are offered to transmitting processor 880.Data source 878 can be illustrated in the application of for example, in UE850 and various user interface (, keyboard) operation.Be similar to the described function of downlink transmission in conjunction with Node B 810, transmitting processor 880 provides various signal processing functions, it comprises CRC code, encodes and interweaves contributing to realize FEC, be mapped to signal constellation (in digital modulation), use OVSF to carry out spread spectrum, and carry out scrambling to generate series of sign.Channel processor 894, can be for selecting suitable coding, modulation, spread spectrum and/or scrambling scheme according to the reference signal being sent by Node B 810 or the channel estimation value of deriving according to the feedback comprising in leading code (midamble) in being sent by Node B 810.The symbol that transmitting processor 880 is produced offers frame emission processor 882, to create frame structure.Frame emission processor 882 by by these symbols with carry out middle leading code 314(Fig. 3 of self-controller/processor 890) carry out the multiplexing this frame structure that creates, form a succession of frame.Subsequently, these frames are offered to transmitter 856, transmitter 856 provides various signal conditioning functions, it comprise to these frames amplify, filtering and being modulated on carrier wave, to carry out ul transmissions on wireless medium by antenna 852.

At Node B 810 places, by being similar to the described mode of receiver function in conjunction with UE850 place, ul transmissions is processed.Receiver 835 transmits by antenna 834 receiving uplinks, and processes this transmission, to recover to be modulated to the information on this carrier wave.The information that receiver 835 is recovered offers received frame processor 836, and received frame processor 836 is resolved each frame, and provides middle leading code 314(Fig. 3 to channel processor 844), to receiving processor 838, provide data, control and reference signal.Receiving processor 838 is carried out the inverse operation by the performed processing procedure of transmitting processor 880 in UE850.Entrained data and the control signal of frame that success can be decoded offers respectively data sink 839 and controller/processor.If receiving processor is not successfully decoded to some frames in these frames, controller/processor 840 can also use confirmation (ACK) and/or Negative Acknowledgement (NACK) agreement, supports the repeat requests to these frames.

Controller/processor 840 and 890 can be respectively used to instruct the operation at Node B 810 and UE850 place.For example, controller/processor 840 and 890 can provide various functions, and it comprises timing, peripheral interface, voltage adjustment, power management and other control function.Memory 842 and 892 computer-readable medium can be stored respectively data and the software for Node B 810 and UE850.Scheduler/the processor 846 at Node B 810 places can be for to UE Resources allocation, and scheduling is for down link and/or the ul transmissions of UE.

Referring again to Fig. 6, it should be noted in the discussion above that aspect method 120, the first and second wireless access technologys can be RAT114 and the RAT216 in Fig. 1.

In addition, in one aspect in, the action square frame 122,124 of

method

120 and 126 can be by UE12(Fig. 1) or UE850(Fig. 8) carry out.In one aspect, (for example, UE850) controller/processor 890(Fig. 8) action (described such as square frame 122,124 and 126) that can control method 120.In addition, the computer-readable medium of memory 892 can be UE850(UE12(Fig. 1 for example)) storage data and software to be to carry out these actions.

In a kind of configuration, for example, for the device 850 of radio communication, comprise: for obtaining the module of the relative synchronizing information between the first wireless access technology and the second wireless access technology, for determine the module of time location of the pilot signal of the second wireless access technology and the module for the pilot signal of the second wireless access technology being searched for determined time location based on this relative synchronizing information.In one aspect, aforementioned modules can be to be configured to carry out the processor 890(Fig. 8 by function described in aforementioned modules).In one aspect of the method, aforementioned modules can be to be configured to carry out by the module of function described in aforementioned modules, to be stored in instruction on computer-readable medium or any device such as capture component 18.

Referring again to Fig. 1 and Fig. 2, aspect optional in, system 10 can also comprise that operation is to measurement clearance 40(Fig. 2) value and/or the position gap determiner assembly 108 that calculates and/or adjust.For example, gap determiner assembly 108 can be the network entity communicating with RAT114 and/or RAT216, or gap determiner assembly 108 can be a part of RAT114 and/or RAT216.In other side, gap determiner assembly 108 can be positioned at UE12(Fig. 1) upper or with UE12(Fig. 1) communicate.In one aspect, gap determiner assembly 108 can comprise for to initial measurement gap duration 110(Fig. 2) and relative time position and the cycle 42 of measurement clearance 40 analyze, and judge whether one or more in hardware, software, firmware and/or algorithm that any one characteristic in these characteristics is modified and agreement.For example, in one aspect, gap determiner assembly 108 can obtain relative synchronizing information 20 from UE12 and/or from memory or relational database, and this makes gap determiner assembly 108 can identify RAT216(Fig. 2) one or more time location 26(Fig. 2 of corresponding one or more pilot signals 25).Therefore, gap determiner assembly 108 for example can comprise, for the initial measurement gap duration 110 (is adjusted into relative smaller value, new measurement clearance duration 112(Fig. 2) algorithm, described relative smaller value can be corresponding with the time cycle that comprises single pilot signal 25, or in some cases with RAT216(Fig. 2) a more than pilot signal 25 corresponding.In certain aspects, for example, gap determiner assembly 108 can execution algorithm calculates the same or analogous new measurement clearance duration 112 of duration with time location 26.And the algorithm of gap determiner assembly 108 can be for definition and RAT216(Fig. 2) a plurality of pilot signals 25 in the corresponding a plurality of new measurement clearance duration 112(of each pilot signal at least reach the scope of time location 26 as determined in UE12).Correspondingly, gap determiner assembly 108 can also be to UE12 and/or to 18 new measurement clearance duration 112 or a plurality of new measurement clearance duration 112 of transmission of capture component, to be used for the pilot signal 25 of RAT216 to search for by searcher 28.

With reference to Fig. 9, in operation, be associated with network entity (such as RAT114 or RAT216) or be positioned at UE12 and above or with the gap determiner assembly 108 that UE12 communicates can carry out the method 900 that wireless access technology is searched for.In one aspect, method 900 can comprise: obtain the relative synchronizing information (square frame 902) between the first wireless access technology and the second wireless access technology.In one aspect, for example, synchronizing information can be by one or more subscriber equipmenies (such as UE12(Fig. 1)) offer gap determiner assembly 108, or can be accessed by memory or the relational database from UE12 by gap determiner assembly 108.

In addition, method 900 can comprise based on relative synchronizing information determines measurement clearance duration and measurement clearance position, so that the pilot tone that comprises the second wireless access technology (square frame 904).In one aspect, for example, gap determiner assembly 108 can execution algorithm to determine the new measurement clearance duration, this new measurement clearance duration may be less than the pilot period of the second wireless access technology.

Alternatively, method 900 can also comprise: from clearance measurement assembly 108 to UE12 and/or to capture component 18, transmit new measurement clearance duration 112 or a plurality of new measurement clearance duration 112, to be used for searching for the pilot signal 25 of RAT216 by searcher 28.

In aspect method 900, the first and second wireless access technologys can be RAT114 and the RAT216 of Fig. 1.

In addition, in one aspect in, (for example, RAT216(Fig. 1's)) controller/processor 840(Fig. 8) can control the action of square frame 902 and 904.In addition, the computer-readable medium of memory 842 for example can be stored, for (, RAT216(Fig. 1)) data and the software of Node B 810, to carry out these operations.In other side, (for example, UE12(Fig. 1's)) controller/processor 890(Fig. 8) can control the action of square frame 902 and 904.And the computer-readable medium of memory 892 can be stored Fig. 1 for UE12() data and software, to carry out these operations.

In a kind of configuration, for example, for the device 810 of radio communication, comprise: for obtaining the module of the relative synchronizing information between the first wireless access technology and the second wireless access technology, and for determining measurement clearance duration and measurement clearance position so that the module of the pilot tone that comprises the second wireless access technology based on relative synchronizing information.In one aspect, aforementioned modules can be to be configured to carry out the processor 840(Fig. 8 by function described in aforementioned modules).In one aspect of the method, aforementioned modules can be to be configured to carry out by the module of function described in aforementioned modules, to be stored in instruction or any device such as gap determiner assembly 108 on computer-readable medium.

In another kind configuration, for example, for the device 850 of radio communication, comprise: for obtaining the module of the relative synchronizing information between the first wireless access technology and the second wireless access technology, and for determine measurement clearance duration and measurement clearance position based on relative synchronizing information, so that the module of the pilot tone that comprises the second wireless access technology.In one aspect, aforementioned modules can be to be configured to carry out the processor 890(Fig. 8 by function described in aforementioned modules).In one aspect of the method, aforementioned modules can be to be configured to carry out by the module of function described in aforementioned modules, to be stored in instruction or any device such as gap determiner assembly 108 on computer-readable medium.

Should be noted that, RAT114(Fig. 1) can comprise for obtaining similar assembly, module or the device of the relative synchronizing information between the first wireless access technology and the second wireless access technology, and for determining measurement clearance duration and measurement clearance position based on relative synchronizing information so that the module of the pilot tone that comprises the second wireless access technology (as above with reference to RAT216(Fig. 1) and/or comparable device 810(Fig. 8) describe).

In addition, can in exemplary use-case (it should not be interpreted as restrictive), use above-mentioned aspect, wherein, for one or more reasons, need the mobility (switch or reselect) between different wireless access technologys (RAT).For example, fast between RAT, mobility for example, is important for guaranteeing that service continuity and service are successfully established (especially for circuit switched fallback (CSFB), (see,, CSFB, 3GPP TS23.272)).

During the measurement clearance that UE opens at LTE network conventionally, from LTE, carry out searching between RAT.In one aspect, the duration in these gaps is generally 6ms, and can with certain cycle, (for example, 40ms) occur.Fewer for the number of gaps of catching, acquisition time is faster, and corresponding audio call is set up faster.The search (supposing not know regularly) that in most of the cases (for example, with regard to LTE to regard to GSM) UE must complete.In this case, UE may need, by a large amount of measurement clearance, produced false-alarm is searched for and abandoned to all possible timing hypothesis.But the in the situation that of TD-LTE and TD-SCDMA, these two networks are synchronous, and have identical pilot period (that is, 5ms).Because two networks are that to use GPS or the Big Dipper to carry out synchronous, so their pilot tone has regular time skew relative to each other.According to described aspect, UE can utilize this structure to reduce the timing hypothesis set of its test, and greatly shortens and catch and Measuring Time.

But in some aspects in aspect above-mentioned, in order to obtain sane system, UE can suppose that relative pilot frequency locations can change, although change with low probability.For example, different frequency bands can have different UL/DL divisions and therefore have different relative timings.Likely different geographic areas (such as, city) has different relative timings.Another example is that specific base station (for example, Femto cell) is temporarily or for good and all to lose its timing source.

In order to reach the fast Acquisition time in sane mode, in such as use-case, UE can maintain the form of relative timing between TD-LTE and TD-SCDMA skew or relational database as the function of TD-LTE and TD-SCDMA frequency band.For example, can to this form, carry out initialization (or being initialized as complete zero) by off-line measurement.In one aspect, UE can obtain quick TD-SCDMA with this form and measure after receiving CSFB request.If measured unsuccessfully, UE can seek help from complete search.Owing to expecting that form or relational database are almost always accurate, thereby therefore expect initial measurement success and obtain quick obtaining/Measuring Time.In another option, when UE resided in TD-LTE when upper, in order to upgrade UE form, UE can for example, carry out the TD-SCDMA Cell searching of complete with lower cycle (, every a few minutes once).Use this option by guarantee the synchronous form of UE or relational database keep up-to-date in, UE battery life is produced to minimum impact.

Solution above can provide the quick obtaining/measurement of TD-LTE to (or vice versa) between TD-SCDMA in still healthy and strong to change keeping once in a while in relative timing.It should be noted in the discussion above that and can suppose that different frequency bands has independently regularly.In one aspect of the method, described apparatus and method be take extra complexity as cost, by making form or relational database comprise also the relative timing as the function in geographical position, can have the reliability of improvement.

It should be noted in the discussion above that described effective search procedure can be for any mobility between synchronizing network, not only for the object of CSFB.For example, described aspect can reselect for the free time from TD-SCDMA to TD-LTE, or vice versa.In this case, better battery life will be caused shorter search time.Another kind of mobility example comprises from TD-LTE to TD-SCDMA(or vice versa) packet switching switch (PSHO).

Alternatively or additionally, the measurement clearance duration that described aspect can also utilize Timing Synchronization information to reduce to open in TD-LTE waveform.Conventionally, the duration of the measurement clearance in LTE is 6ms, with regard to TD-SCDMA or UMTS, and need to the complete subframe of this duration to comprise 5 milliseconds.Because a complete subframe of 5 milliseconds is comprised in measurement clearance, so this configuration can guarantee in measurement clearance, there will be at least one pilot tone example.But, according to described aspect, if the pilot tone timing slip between two networks is known, can use much smaller gap (for example, 1ms) and this much smaller gap still can comprise pilot signal.In this case, described aspect is used the shorter measurement clearance duration to cause the lower throughput loss in TD-LTE system.

Some aspects of telecommunication system with reference to TD-SCDMA system, have been provided.As one of ordinary skill will be understood, can expand to other telecommunication system, the network architecture and communication standard by running through the described various aspects of the application.For example, various aspects can be expanded to other UMTS system, for example, W-CDMA, high-speed downlink packet access (HSDPA), High Speed Uplink Packet access (HSUPA), high-speed packet access+(HSPA+) and TD-CDMA.Various aspects can also be expanded to and use Long Term Evolution (LTE) (to there is FDD, tdd mode, or these two kinds of patterns), enhancement mode LTE(LTE-A) (there is FDD, tdd mode, or these two kinds of patterns), CDMA2000, Evolution-Data Optimized (EV-DO), Ultra-Mobile Broadband (UMB), IEEE802.11(Wi-Fi), IEEE802.16(WiMAX), system and/or other suitable system of IEEE802.20, ultra broadband (UWB), bluetooth.The actual telecommunication standard, the network architecture and/or the communication standard that use, by whole design constraints of depending on concrete application and this system being applied.

As used in this application, term " assembly ", " module ", " system " etc. are intended to comprise the entity relevant to computer, such as but not limited to: the combination of hardware, firmware, hardware and software, software or executory software etc.For example, assembly can be but be not limited to be: the thread of the process of moving on processor, processor, object, executable program, execution, program and/or computer.By the mode of explanation, the two can be assembly for the application moving on computing equipment and this computing equipment.One or more assemblies can be positioned at the thread of process and/or execution, and assembly can and/or be distributed on a computer between two or more computers.In addition, these assemblies can be carried out by storing the various computer-readable mediums of various data structures on it.These assemblies can be for example according to the signal with one or more packets, by the mode of local process and/or remote process, by this signal and other system, communicate, for example, described one or more packet is the data from an assembly, and another assembly in this assembly and local system, in distributed system and/or on the network such as the Internet carries out alternately.

In conjunction with various apparatus and method, some processors have been described.Can realize these processors by electronic hardware, computer software or their combination in any.As for these processors, be embodied as hardware or be embodied as software and will depend on concrete application and the overall design constraints that system is applied.For example, a processor, any part of a processor or the combination in any of a plurality of processors providing in the application can be with microprocessor, microcontroller, digital signal processor (DSP), field programmable gate array (FPGA), programmable logic device (PLD), state machine, gate logic, discrete hardware circuit and is configured to carry out other the suitable processing components run through the described various functions of the application and realizes.The function of a processor, any part of a processor or the combination in any of a plurality of processors providing in the application can use the software of being carried out by microprocessor, microcontroller, DSP or other suitable platform to realize.In addition, at least one processor can comprise one or more modules, and wherein at least some modules comprise hardware, and this hardware can operate to carry out one or more in above-mentioned steps and/or action.

Software should be widely interpreted thread for referring to instruction, instruction set, code, code segment, program code, program, subprogram, software module, application program, software application, software kit, routine, subroutine, object, executable file, execution, process, function etc., no matter is called as software, firmware, middleware, microcode, hardware description language or other title.Software can be positioned on computer-readable medium, and this computer-readable medium can operate so that computer is carried out function.For example, computer-readable medium such as magnetic storage apparatus (for example can comprise, hard disk, floppy disk, tape) and so on memory, laser disc (for example, compression laser disc (CD), digital versatile disc (DVD)), smart card, flash memory device (for example, card, rod, cipher key drivers), random-access memory (ram), read-only memory (ROM), programming ROM (PROM), erasable PROM(EPROM), electric erasable PROM(EEPROM), register or moveable magnetic disc.Although memory is shown with processor and is separated in the various aspects that provide in full in the application, memory can be positioned at the inside (for example, high-speed cache or register) of processor.In addition, in certain aspects, the step of method or algorithm and/or action can be used as in code and/or instruction one or combination in any or set is positioned on machine readable media and/or computer-readable medium, this machine readable media and/or computer-readable medium can be merged in computer program, and this computer program is can right and wrong provisional.

Computer-readable medium can carry out specific implementation with computer program.For example, computer program can comprise the computer-readable medium with encapsulating material.Those of ordinary skills will be appreciated that, according to the specific design constraint of applying and whole system being applied, how to realize and to run through the described function that the application provides best.

Should be understood that the example that the concrete order of the step in disclosed method or level are example process.Should be understood that, according to design preference, can rearrange concrete order or the level of the step in these methods.Appended claim to a method provides the element of various steps with example sequence, but is not intended to be limited to given concrete order or level, unless the application clearly states.

Any those of ordinary skill in this area provides aforementioned description, so that can be realized various aspects as herein described.To those skilled in the art, to the various modifications of these aspects, will be apparent, and general principles defined herein go for other side.Therefore, the aspect that claim is not intended to be limited to illustrate herein, but consistent with the four corner of the language of claim, wherein, unless stated otherwise, otherwise the parts of mentioning singulative are not intended to mean " one and only one ", but " one or more ".Unless stated otherwise, otherwise term " some " refers to one or more.The phrase of mentioning a row entry " at least one " refers to the combination in any of these entries, and it comprises single member.For example, " at least one in a, b or c " is intended to cover: a; B; C; A and b; A and c; B and c; And a, b and c.To those skilled in the art known or later known by becoming, with the key element that runs through the various aspects described in the application mutually all 26S Proteasome Structure and Functions of equal value in introducing mode, clearly include this paper in, and be intended to be covered by claim.In addition, content disclosed herein is not intended to offer to the public, and no matter whether these disclosures are clearly recorded in the claims.The key element of claim should not make an explanation according to the clause of the 6th section of 35U.S.C. § 112, unless use phrase " for ... module " clearly explain this key element, or the in the situation that of claim to a method, use phrase " for ... step " to explain key element.

Claims

1. the method that wireless access technology is searched for, comprising:

By processor, obtain the relative synchronizing information between the first wireless access technology and the second wireless access technology; And

Based on described relative synchronizing information, determine the time location of the pilot signal of described the second wireless access technology.

2. method according to claim 1, also comprises: with determined time location, the described pilot signal of described the second wireless access technology is searched for.

3. method according to claim 2, wherein, described search is triggered by mobility, and described mobility triggers and comprises: switching or the idle mode cell of circuit switched fallback (CSFB), communication session reselect.

4. method according to claim 2, also comprises: determine the search that comprises failure based on the described search of determined time location, and carry out the search of complete system acquisition in response to determined failed search.

5. method according to claim 2, wherein, compare with not using another search of described relative synchronizing information, the described search based on determined time location causes finding by measurement clearance still less the described pilot signal of described the second wireless access technology.

6. method according to claim 1, wherein, obtains described relative synchronizing information and also comprises: obtain the relative pilot frequency deviation between described the first wireless access technology and described the second wireless access technology.

7. method according to claim 1, wherein, described relative synchronizing information is frequency band special use or position-specific.

8. method according to claim 1, also comprises: by the complete search of carrying out once in a while, upgrade described relative synchronizing information.

9. method according to claim 1, also comprises:

Based on described relative synchronizing information, determine measurement clearance duration and measurement clearance position, so that the described pilot tone that comprises described the second wireless access technology.

10. method according to claim 9, wherein, obtains described relative synchronizing information and also comprises: from one or more subscriber equipmenies, receive described relative synchronizing information.

11. methods according to claim 9, wherein, the described measurement clearance duration is less than the pilot period of the described pilot tone of described the second wireless access technology.

12. 1 kinds of computer programs for wireless access technology search, comprising:

Computer-readable medium, described computer-readable medium comprises:

Can operate so that computer obtains at least one instruction of the relative synchronizing information between the first wireless access technology and the second wireless access technology; And

Can operate so that described computer based is determined at least one instruction of time location of the pilot signal of described the second wireless access technology in described relative synchronizing information.

13. computer programs according to claim 12, also comprise: can operate so that at least one instruction that described computer is searched for the described pilot signal of described the second wireless access technology with determined time location.

14. computer programs according to claim 12, also comprise: can operate so that described computer based is determined measurement clearance duration and measurement clearance position in described relative synchronizing information, so that at least one instruction of the described pilot tone that comprises described the second wireless access technology.

15. 1 kinds of devices for wireless access technology search, comprising:

For obtaining the module of the relative synchronizing information between the first wireless access technology and the second wireless access technology; And

For determine the module of time location of the pilot signal of described the second wireless access technology based on described relative synchronizing information.

16. devices according to claim 15, also comprise: for the module of the described pilot signal of described the second wireless access technology being searched for determined time location.

17. computer programs according to claim 15, also comprise: for determining that based on described relative synchronizing information measurement clearance duration and measurement clearance position are so that the module of the described pilot tone that comprises described the second wireless access technology.

18. 1 kinds of devices for wireless access technology search, comprising:

At least one processor; And

Memory, described memory is couple to described at least one processor;

Wherein, described at least one processor is configured to:

Obtain the relative synchronizing information between the first wireless access technology and the second wireless access technology; And

19. devices according to claim 18, wherein, described at least one processor is also configured to: with determined time location, the described pilot signal of described the second wireless access technology is searched for.

20. devices according to claim 19, wherein, described at least one processor is also configured to: based on mobility, trigger to search for, described mobility triggers and comprises: circuit switched fallback (CSFB) or idle mode cell reselect.

21. devices according to claim 19, wherein, described at least one processor is also configured to: determine and comprise the search of failure based on the described search of determined time location, and be configured to: in response to determined failed search, carry out the search of complete system acquisition.

22. devices according to claim 19, wherein, compare with not using another search of described relative synchronizing information, the described search based on determined time location causes finding by measurement clearance still less the described pilot signal of described the second wireless access technology.

23. devices according to claim 18, wherein, described relative synchronizing information comprises: the relative pilot frequency deviation between described the first wireless access technology and described the second wireless access technology.

24. devices according to claim 18, wherein, described relative synchronizing information is frequency band special use or position-specific.

25. devices according to claim 18, wherein, described at least one processor is also configured to: by the complete search of carrying out once in a while, upgrade described relative synchronizing information.

26. devices according to claim 18, wherein, described at least one processor is also configured to: based on described relative synchronizing information, determine measurement clearance duration and measurement clearance position, so that the described pilot tone that comprises described the second wireless access technology.

27. devices according to claim 26, wherein, described at least one processor is also configured to: from one or more subscriber equipmenies, obtain described relative synchronizing information.

28. devices according to claim 26, wherein, the described measurement clearance duration is less than the pilot period of the described pilot tone of described the second wireless access technology.