CN101641874A - New and legacy wireless communication device coexisting amble sequence - Google Patents

Abstract

The embodiments generate a new type of amble sequence for a wireless communication network with mixed nodes, by generating a first amble sequence invisible to a first node based upon an existing amblesequence for the first node and generating a second amble sequence having a low to zero cross-correlation with the first amble sequence, based upon the first amble sequence. The first and second amble sequences can be broadcast in alternating communication link frames.

Description

New and code-guiding sequence existing Wireless Telecom Equipment coexist

The cross reference of related application

It is the U.S. Provisional Application 60/822 of MANAGING A WIRELESSNETWORK that the application relates to and require the title that the Chenxi Zhu, the Wei-PengChen that submitted on August 18th, 2008 and Jonathan Agre done, 861 priority, relate to and require the U.S. Provisional Application of submitting on August 18th, 2,006 60/822,791 priority, and relate to and require U.S.'s non-provisional application 11/830 of submitting on July 31st, 2007,929 priority all is incorporated herein these applications by reference.

Background technology

1. field

Execution mode disclosed herein relates to wireless communication device/network amble sequence or synchronizing symbol.

2. description of Related Art

In wireless network, often use lead code, be used to carry out time and the Frequency Synchronization and/or the channel estimating of network identity, Wireless Telecom Equipment and network.In wireless cellular network, lead code is the known symbol of Wireless Telecom Equipment.First equipment, as wireless network infrastructure device (for example base station in the cellular network), the code-guiding sequence of knowing to device broadcasts (transmission) in the fixed position of every frame (usually in the starting position of frame, and be called as lead code) periodically.Second Wireless Telecom Equipment is searched lead code, finding out the first contiguous equipment, and the time synchronized of acquisition and wireless network and Frequency Synchronization.

Sometimes need new code-guiding sequence be incorporated in the wireless communication system at the Wireless Telecom Equipment of newtype.The possible cause that is necessary for the new code-guiding sequence of new equipment introducing is, because some restriction of system design causes new equipment need receive and the different code-guiding sequence of existing lead code (legacy preamble).New equipment and existing equipment (legacy device) can coexist in identical network, and wherein existing equipment is designed to only discern old lead code.Importantly, the discernible any new code-guiding sequence of new equipment will be designed to cause old equipment to be obscured.

Summary of the invention

The one side of execution mode disclosed herein provide any fixing of the Frame of radio transmission or known position broadcasting or transmission, coexistence radio communication code-guiding sequence new and existing Wireless Telecom Equipment or synchronizing symbol (back be called code-guiding sequence or abbreviate as lead sign indicating number), for example (be not limited to) lead code, in lead sign indicating number (midamble), after lead sign indicating number or their combination.

According to the aspect of execution mode, wireless network broadcast (transmission) is existing lead sign indicating number and newly lead sign indicating number both, to support existing Wireless Telecom Equipment and new Wireless Telecom Equipment.Existing existing in other words Wireless Telecom Equipment should be not that the sign indicating number of leading of the new wireless transmission of new Wireless Telecom Equipment is obscured by target, perhaps should not discern or lock this and lead sign indicating number.

According to the aspect of execution mode, make up the code-guiding sequence of newtype for the cordless communication network of wireless communication node (equipment) with mixing.New code-guiding sequence to some nodes as seen, and is and invisible to other nodes.Aspect according to execution mode, cordless communication network generates new for the code-guiding sequence of radio broadcasting or transmission, for example lead code, in lead the sign indicating number, after lead sign indicating number, or any other special radio communication synchronizing symbol, these code-guiding sequences only can be by new Wireless Telecom Equipment identification, can not be discerned by existing Wireless Telecom Equipment, so existing Wireless Telecom Equipment will can not obscured by new symbol.

Execution mode is by generating second code-guiding sequence that has low cross correlation with first code-guiding sequence in frequency domain, and generate the 3rd code-guiding sequence that has low cross correlation with described second code-guiding sequence based on described second code-guiding sequence, in wireless network, generate code-guiding sequence with described first code-guiding sequence.

With reference to the accompanying drawing that forms a specification part, these and other aspect and advantage become clear in the details of structure and the operation of more complete description and requirement in the back, and similar label refers to similar part in the text in the accompanying drawing.

Description of drawings

Fig. 1 is based on the figure of the mobile multi-hop sub-district (MMR sub-district) of relaying.

Fig. 2 A is the flow chart according to the new wireless device amble of generation of execution mode.

Fig. 2 B is the figure according to the Frame in the MMR sub-district of execution mode.

Fig. 3 is the functional block diagram according to the device of the generation code-guiding sequence of execution mode.

Fig. 4 is the function diagram according to processing layer in the device of Fig. 3 of execution mode (software and/or computing hardware).

Embodiment

These execution modes are the code-guiding sequence with cordless communication network generation newtype of mixed node by such mode, promptly generate sightless first code-guiding sequence of first node, and have low even second code-guiding sequence that arrive zero (low to zero) cross correlation based on the generation of first code-guiding sequence and first code-guiding sequence based on existing code-guiding sequence at first node.First and second code-guiding sequences are alternately broadcasted in communication link frame.

These execution modes can be included in any in the cordless communication network of physical layer place use OFDM (OFDM).But these execution modes are not limited to can be contained in any broadband wireless access standards, for example (be not limited to) IEEE 802.16 standards (being also referred to as World Interoperability for Microwave Access, WiMax (WiMAX) network), these standards specify diverse network to insert standard at the physical layer place based on Frequency Division Duplexing (FDD) (FDD) system (for example (being not limited to) OFDM (OFDM), OFDM (OFDMA), frequency division multiplexing (FDM) and/or frequency division multiple access (FDMA)).

For example, in radiocommunication cellular network, use wireless relay, by using, can be the effective means that the WiMAX wireless cellular network improves user's signal quality via a plurality of short high quality links replacement base station (BS) of one or more relay stations (RS) and the long low quality wireless communication link between mobile/subscriber station (MS/SS) (being called MS hereinafter).Because relay station does not require their wired backhaul, and there is not global function BS complexity usually, so employing and operation relay station are more cheap than traditional B S.The coverage hole that relay station can originally can not obtain the service extension of BS to serve to user wherein, and the efficient cell size of expansion BS.Relay station can also be used to improve carrier wave and interference and noise ratio (CINR) and quality of services for users (QoS), and strengthens cell capacity.

Relaying technique can be according to IEEE 802.16 standards (being included in the 802.16j relaying working group).In IEEE 802.16j standard, relay station is communicated by letter with BS as MS, and communicates by letter with MS in its overlay area (being called the RS Microcell) as BS.The whole service coverage area of BS and all RS that are associated can be called as the sub-district (MMR sub-district or MMR network) based on the mobile multi-hop of relaying.

According to the aspect of execution mode, can generate new code-guiding sequence for cordless communication network new and existing (existing) Wireless Telecom Equipment with coexistence.An illustrative embodiments generates the new code-guiding sequence that is used for WiMAX mobile multi-hop junction network (MMR sub-district), in this network, relay station (RS) as the newtype Wireless Telecom Equipment is introduced into, and it is synchronous to need to carry out radio communication by new code-guiding sequence and base station (BS) and/or other RS, should be not that the new code-guiding sequence of new RS is obscured simultaneously, perhaps should not discern this new code-guiding sequence by target such as the existing or existing wireless communication equipment of mobile radio station (for example radio telephone, wireless personal digital assistant, wireless media player etc.).

Aspect according to execution mode, radio communication code-guiding sequence or synchronizing symbol (be called code-guiding sequence hereinafter or abbreviate as lead sign indicating number) be any wireless transmission of using in the cordless communication network signal, binary digit modulation sequence (typically, for example with 0,1 converts-1 to, + 1), pulse or their combination in any, it is synchronous to be used to carry out the radio communication of any kind for Wireless Telecom Equipment/system, is including but not limited to sign (for example network identity, identity of wireless device etc.), time and/or Frequency Synchronization, estimation (for example channel estimating), calibration etc.

The cordless communication network that these execution modes are applied to use FFD and/or TDD and have mixed node, wherein first node can need first code-guiding sequence, and other Section Points can need second code-guiding sequence, simultaneously first code-guiding sequence is invisible to Section Point, and the combination in any of first and second code-guiding sequences is visible and/or invisible to the node of arbitrary number in the mixed node.In an illustrative embodiments, Fig. 1 is the topological diagram with MMR sub-district 100 of BS 102 and two relay stations (RS1 and RS2) 104a, 104b.BS 102 directly is MS _BSThe MS that concentrates _1-6106 _A-f(MS ₁106a and MS ₂106b) service.Two relay station (RS ₁104a, RS ₂104b) be used to expand the covering of BS 102, and be MS _RS1(MS ₃106c, MS ₄106d) and MS _RS2(MS ₅106e, MS ₆106f) concentrated MS _S3-6The 106c-f service.MMR sub-district 100 comprises the overlay area of BS 102 and all RS 104.

Code-guiding sequence based on the MMR sub-district 100 of using that insert and wherein new Wireless Telecom Equipment (for example RS 104) of OFDM/OFDMA wireless network and existing Wireless Telecom Equipment (for example MS 106) to coexist at the physical layer place is described these execution modes.In Fig. 1, OFDM or OFDMA system are used as embodiment, when new Wireless Telecom Equipment (for example RS 104) when being introduced into, old or the existing code-guiding sequence P (being called existing lead code) of the lead code that BS transmission/transmission is for example old, as OFDM symbol with known modulated sequence, for example two-phase PSK (BPSK), quarternary phase-shift keying (QPSK) (QPSK), phase shift keying (PSK), QPSK or quadrature amplitude modulation (QAM) or their combination in any.Existing lead code can be used as MS 106 identifications or known of old wireless device.The fast Fourier transform (FFT) size of supposing ofdm signal is N _FFT, and the number of the actual subcarrier that uses is N _USED, then in frequency domain, existing lead code symbol only can be expressed as in the subcarrier that uses:

$P=[P_1,...,P_i,...,P_{N_{\mathrm{USED}}}]---\left(1\right)$

The component p of vector P _iIt is the plural number of constellation point (constellation point) (therefrom selecting) corresponding to modulation scheme.For example, for BPSK modulation, p _i∈ 1,1}, and for QPSK modulation (standing the arbitrary phase rotation), p _i∈ 1, i, 1 ,-i}.Different vectorial P can corresponding different code-guiding sequences.In formula (1), the index of the OFDM/OFDMA subcarrier number that i is to use.Q can be the time-domain signal of code-guiding sequence P, T=1/ Δ f (that is the time period of the code-guiding sequence before the supplementary protection time).Δ f can be the OFDM/OFDMA interval of two adjacent sub-carriers in the OFDM/OFDMA system.I the element of hypothetical sequence P is used to modulate physical sub-carrier k (i), 1≤k (i)≤N _FFT, then the complex base band signal at time-domain signal of P can be:

$Q=\underset{i=1}{\overset{\mathrm{Nused}}{\mathrm{\Σ}}}{P}_k{e}^{j2\mathrm{\πk}\left(i\right)\mathrm{\Δft}}---\left(2\right)$

Existing and any new equipment such as BS 102, RS 104 (for example RS new equipment) and/or MS 106 can be known (identification) code-guiding sequence P.According to the aspect of execution mode, select existing code-guiding sequence based on some considerations (for example than low peak average power than (PAPR) and/or low cross correlation).In the system based on OFDM/OFDMA, equipment (existing type or newtype) can be by calculating signal r (t) and the r (t+T that it receives _i) cross correlation and find out the position that correlation peaks is located code-guiding sequence, wherein T _iBe the repetition period (frame length of lead code sends in every frame) of the preamble sequence of transmission, described correlation peaks can use equation (3) to express:

max _t|∫ _Tr(t+τ)·r ^*(T _f+τ+t)dτ| (3)

According to the aspect of execution mode, the cross correlation of location code-guiding sequence is meant, when equipment (for example MS 106, RS 104) was identified in the code-guiding sequence that the fixing or known position of every frame occurs, it was basic identical in every frame to lead sign indicating number.Equipment is collected wireless signal samples at different time (for example, adjacent downlink/uplink communication frame) with the time window (time window has the length of code-guiding sequence) of identical size, and these complex conjugate samplings are multiplied each other, and carries out cross-correlation.According to the aspect of execution mode, sample frame is not limited to consecutive frame, and can be to averaging on any number of adjacent frames.In other words, collect sampling from a plurality of times that separate the frame time section, and when leading when yard falling into correlation window, equipment adjustment or be offset its time window gradually detects the strong correlation peak value up to it.This processing and utilizing the fact that periodically repeated of code-guiding sequence.Need further signal processing to determine from the sequence sets of all definition, to have sent which code-guiding sequence.In other words, correlation peaks (basic identical) stronger in only a plurality of frames can be indicated the code-guiding sequence that may receive, yet, before equipment carried out further signal processing to known (for example being stored in computer-readable medium) code-guiding sequence, what this equipment can not be distinguished transmission was which code-guiding sequence that the known code-guiding sequence of this equipment is concentrated.In up link or descending chain circuit frame communication period, the code-guiding sequence cross-correlation can be carried out (depending on the circumstances) by any Wireless Telecom Equipment.Therefore, if new code-guiding sequence is introduced into, new code-guiding sequence, the execution of the scheme locking of describing before then existing device can use further handled and distinguished new code-guiding sequence, but only can determine this new code-guiding sequence and be unknown or unwanted, this has unnecessarily prolonged it and has been used for obtaining time with Network Synchronization.

Although described a kind of illustrative embodiments based on MMR sub-district 100, these execution modes are not limited to this structure, and can be used for being used for network identity and/or synchronous any cordless communication network with leading sign indicating number.Aspect according to execution mode, a plurality of code-guiding sequences can be made up and broadcasting by any Wireless Telecom Equipment of setting up network time and/or frequency reference, the first equipment collection can not lock described a plurality of code-guiding sequence, and another equipment collection can lock described a plurality of code-guiding sequence.For example, if the first equipment collection can detect first code-guiding sequence, then when the first equipment collection with its time window and the signal sampling that comprises second code-guiding sequence that receives on time, the first equipment collection does not detect stronger cross correlation peak value, perhaps discovery in one embodiment was zero (comprising zero in the scope) with the cross-correlation peak value of second code-guiding sequence substantially, and therefore second code-guiding sequence is transparent to the first equipment collection.Yet the second equipment collection can be programmed locatees and detects first code-guiding sequence, second code-guiding sequence, or their combination in any.

In cordless communication network, need generate new lead code at any new equipment of introducing in the cordless communication network (for example (but being not limited to) provides the RS 104 of MMR sub-district 100), to realize and the time and the Frequency Synchronization of new equipment that existing lead code coexists in described new lead code and the consolidated network simultaneously.Aspect according to execution mode, in MMR sub-district 100, for RS makes up new code-guiding sequence (RS in the Frame leads sign indicating number), this code-guiding sequence is sent by BS 102 and/or main RS104 (being not limited to), and can be comprised RS 104 identification (promptly having the link of main RS), and be transparent to MS106 as existing device or existing equipment to other RS from RS 104.Can only be designed to existing lead code synchronously such as the existing equipment of MS 106, and they should not obscured by the new preamble that with RS 104 is target.According to the aspect of execution mode, can broadcast existing code-guiding sequence, new code-guiding sequence or their combination in any by various Wireless Telecom Equipments.For example, can by the broadcasting of BS 102 or other equipment (depending on the circumstances) new with old code-guiding sequence.According to the aspect of execution mode, invisible and only the visible mode of new equipment is generated the new sign indicating number (a for example new lead code) of leading with new lead code as follows to existing equipment:

Fig. 2 is the flow chart according to the new wireless device amble of generation of execution mode.At 202 places, finding out (set up or generate) according to known technology is N with the length that the first existing code-guiding sequence P has than low correlation _UsedThe second code-guiding sequence P ':

$P^{\′}=[P_1^{\′},...,P_i^{\′},...,P_{N_{\mathrm{used}}}^{\′}]---\left(4\right)$

" when (being described below), can consider other requirements, the peak-to-average power of for example leading coded signal is than (PAPR) to generate P ' and P.P ' and P " also need to satisfy these other requirements.The length N of sequence P ' can be according to using criterion.P ' time-domain signal is Q '.P ' and P " between cross correlation should be suitable with the cross correlation of two random noise sequences of equal length.

At operation 204 places, as follows by with the pole reversal of one or more component among the second code-guiding sequence P ' (upset, change) (for example the polarity by the middle component of the upset second code-guiding sequence P ' (for example by the second code-guiding sequence P ' that alternately overturns polarity)), generate or make up the 3rd code-guiding sequence P ":

$P^{\′\′}=[P_1^{\′\′},...,P_i^{\′\′},...,P_{N_{\mathrm{used}}}^{\′\′}]---\left(5\right)$

P″ _i＝(-1) ⁱP′ _i，1≤i≤N _USED (6)

Upset p ' _iPolarity be meant symbol negate with it.For example, at operation 204 places, according to equation (7), the polarity of the position of code-guiding sequence P ' is alternately overturn generates P ".For example, at operation 204 places, each other polarity can be reversed.Under the situation of polarity of the position that alternately changes the second code-guiding sequence P ', the 3rd code-guiding sequence P " can have quite low with the second code-guiding sequence P ' even is zero cross correlation.P ' and P " between cross correlation be:

$<P^{\&prime;},P^{\&prime;\&prime;}>={\&Integral;}_T{Q}^{\&prime;}\left(\mathrm{\&tau;}\right)Q^{\&prime;\&prime;*}\left(\mathrm{\&tau;}\right)*\mathrm{d\&tau;}=\underset{i=1}{\overset{N_{\mathrm{USED}}}{\mathrm{\&Sigma;}}}\underset{i^{\&prime;}=1}{\overset{N_{\mathrm{USED}}}{\mathrm{\&Sigma;}}}{p^{\&prime;}}_i{p^{\&prime;\&prime;*}}_{i^{\&prime;}}\underset{T}{\&Integral;}{e}^{j2\mathrm{\&pi;\&Delta;f\&tau;}(k-\left(i\right)-k\left(i^{\&prime;}\right))}\mathrm{d\&tau;}=T\underset{i=1}{\overset{N_{\mathrm{USED}}}{\mathrm{\&Sigma;}}}{p_i}^{\&prime;}{p_i}^{\&prime;\&prime;}$

According to another execution mode, at operation 204 places, can by each and the stochastic variable of independence and same distribution are multiplied each other (for example, with the centrifugal pump of equal probability generation 1 ,+1} multiplies each other) make up P ".For example, can use equation (8) to generate P ", l wherein _iBe with probability 0.5 get 1, the discrete random variable of the independent same distribution of the value of+1} (i.i.d.).

P″ _i＝l _i·P′ _i，1≤i≤N _USED (8)

Equation 9 proof: when using the equation (8) based on the stochastic variable that generates with equal probability, signal P ' and P " also has low-down or is zero cross correlation.May need to verify P ' and P and " whether have the operation of hanging down cross correlation.P " time-domain signal be Q ".When equation (8) is used to formation sequence P " time,

$E(<P^{\&prime;},P^{\&prime;\&prime;}>)=E({\&Integral;}_T{Q}^{\&prime;}\left(\mathrm{\&tau;}\right)Q^{\&prime;\&prime;*}\left(\mathrm{\&tau;}\right)*\mathrm{d\&tau;})=\underset{i=1}{\overset{N_{\mathrm{USED}}}{\mathrm{\&Sigma;}}}\underset{i^{\&prime;}=1}{\overset{N_{\mathrm{USED}}}{\mathrm{\&Sigma;}}}E\left({p^{\&prime;}}_i{p^{\&prime;\&prime;*}}_{i^{\&prime;}}\underset{T}{\&Integral;}{e}^{j2\mathrm{\&pi;\&Delta;f\&tau;}(k\left(i\right)-k\left(i^{\&prime;}\right))}\mathrm{d\&tau;}\right)$

$=T\underset{i=1}{\overset{N_{\mathrm{USED}}}{\mathrm{\&Sigma;}}}E\left({p_i}^{\&prime;}{p_i}^{\&prime;\&prime;}\right)=T\underset{i=1}{\overset{N_{\mathrm{USED}}}{\mathrm{\&Sigma;}}}E\left(l_i\right)=0.---\left(9\right)$

Operation 206 checking P " whether also have lower cross correlation with P, and whether checking P ' and P " satisfy other and require (embodiment of these requirements can be that the peak-to-average power ratio of signal is lower than certain threshold value)." having low cross correlation, can be optional so operate 206 according to the aspect of execution mode, because P ' has lower cross correlation with P, and P ' and P.If do not satisfy any requirement of operation 206, then can come repetitive operation 202-206 by finding out another code-guiding sequence P ' that has than low cross correlation with P at operation 202 places.Aspect according to execution mode, " requirement all be satisfied, then at operation 208 places; can be with the second and the 3rd code-guiding sequence P ' and P " (as to) if at operation 206 places, P ' and P such as the wireless device of BS, alternate transmission in frame or in other periods of Synchronous Processing needs.For example, wireless device can be in the even frame of cordless communication network wireless transmission P ', wireless transmission P in odd-numbered frame ".(perhaps depend on the circumstances at downlink communication, at uplink communication) in, because P ' and P " have very low even are zero cross correlation; therefore search for the existing equipment (MS 106) of code-guiding sequence and will not observe correlation peaks by carrying out cross-correlation (promptly; old equipment carries out cross-correlation with signal sampling r (t) and the r (t+T) that receives) between the signal in consecutive frame, detect in other words less than P ' and P ".Fig. 2 B is the figure according to the Frame in the MMR sub-district of execution mode.In Fig. 2 B, the operation 208 places, in downlink communication chain circuit-switched data frame (downlink/uplink subframe) 220, as after lead the sign indicating number P ' and P " code-guiding sequence alternately is transmitted in frame.Execution mode is not limited to Fig. 2 B, and P ' and P " lead code that can be transmitted by various Wireless Telecom Equipments and discern, in lead sign indicating number and/or after lead sign indicating number, simultaneously they are sightless to other Wireless Telecom Equipments of being similar to existing MS 106.

At operation 210 places, it is signal r (t) and r (t+2T by it is received that new equipment can obtain synchronous a kind of exemplary approach with BS _f) carry out cross-correlation, and the assigned relevance peak value:

max _t|∫ _Tr(t+τ)·r ^*(2T _f+τ+t)dτ| (10)

New equipment can also use signal processing to identify to lead sign indicating number to (P ', P ").For example, in Fig. 2 B, in this manner, any desired new equipment (in the present embodiment for RS 104) can be discerned and lead yard P ' and P after new " and it is synchronous with them; and existing equipment (for example MS 106) will be led yard P ' and P after will can not discerning or lock when searching for the processing of equation (3) ", and continuation is searched for up to locking onto and is had now or existing lead code P.At operation 210 places, the mode of the position of new equipment location the second or the 3rd code-guiding sequence is that the signal sampling in two frames that separate is carried out cross-correlation.

Because it is right that existing equipment has been ignored this new sign indicating number of leading, so existing equipment can continue according to the existing lead code in equation (3) location.In other words, if existing equipment calculates its known lead code P and P ' or the P as the signal r (t) that receive " cross correlation of code-guiding sequence; then because P and P ' (lower cross correlation between or the P ") will not be so existing equipment will can be observed stronger correlation peaks.If the autocorrelation of existing equipment signal calculated r (t) and r (t+T), then because P ' and P " between cross correlation be zero or less (T); so if the time window of existing equipment drops on lead code P ' and P " on, existing equipment will can not observed correlation peaks so.For any mode, existing equipment all will detect less than new lead code, and will can not be confused.An example benefit of these execution modes is when introducing the equipment of newtype, not reduce the service that offers existing equipment.

According to the aspect of execution mode, new equipment can detect existing lead sign indicating number and newly lead sign indicating number both, and existing equipment only can detect existing lead code.For example, existing equipment will be only synchronous with existing lead code, and new equipment has and the synchronous selection of new or existing lead code.Although the execution mode of describing is used as embodiment with lead code, but this execution mode is not limited to this structure, according to the aspect of execution mode, can make up other special periodicity symbols, for example (be not limited to) to be used for the sign indicating number of leading of device synchronization and channel estimating.

The one side of execution mode disclosed herein provides coexistence radio communication code-guiding sequence new and existing Wireless Telecom Equipment or synchronizing symbol (back be called code-guiding sequence or abbreviate as lead sign indicating number), in any fixing or known position broadcasting of the Frame of radio transmission or transmit described code-guiding sequence or synchronizing symbol, for example (be not limited to) lead code, in lead sign indicating number, after lead sign indicating number or their combination.

Fig. 3 is the functional block diagram that generates the device of code-guiding sequence according to execution mode.In Fig. 3, device can be any computing equipment that code-guiding sequence is carried out radio broadcasting, and for example, (being not limited to) is used as or is operating as the computing equipment of base station 102.Typically, device 300 comprises and is used for the display 302 of explicit user interface.Controller 304 (for example, CPU) is carried out the instruction (for example computer program or software) of control device executable operations.Typically, memory 306 stores the instruction of carrying out for controller 304.Aspect according to execution mode, this device is communicated by letter with any computer-readable medium 310 (for example (being not limited to) physical computer readable medium recording program performing (for example hard disk, memory)) by the wire/wireless carrier signal, perhaps the wired unit communication that realizes with software and/or computing hardware.According to the aspect of execution mode, device 302 carries out radio communication with Target Wireless communication network (for example (being not limited to) MMR sub-district 100).Display 302, CPU 304, memory 304 and computer-readable medium 310 are by data/address bus 308 communications.

Fig. 4 is according to the function diagram of the processing layer (software and/or computing hardware) of execution mode in the device of Fig. 3.In Fig. 4, processing layer comprises network layer 402, media interviews controls (MAC) layer 404 and physical layer 406.The processing layer of Fig. 4 is a logical layer, but execution mode is not limited to these exemplary processing layers, and other processing layer structures also can be provided.According to the aspect of execution mode, network layer 402 is the software that controller 304 is carried out.MAC 404 and network layer 406 are software and/or the computing hardware as wireless communication network unit 310.Generate coexistence to have now/newly the execution mode of the code-guiding sequence of Wireless Telecom Equipment can be that software (stores on any known computer-readable medium 310 or coding, described computer-readable medium 310 for example (is not limited to) computer readable recording medium storing program for performing, compact disk, digital universal disc (DVD), memory, or communication media, for example carrier wave or electromagnetic signal etc.) and/or any computing hardware.Generate coexistence existing/code-guiding sequence P ' and the P of new equipment " execution mode can be included in the MAC layer 404 with physical layer 406 (for example in BS 102 and/or RS 104) transmission and/or reception (search) coexisting code-guiding sequence P ' and P in target radio network node ".In Fig. 4, typically (not limitedly), network layer 403 provides the wired and/or radio communication visit to the individual/public network (for example internet) different with target radio network (for example (being not limited to) MMR sub-district 100).Network layer 403 can be used to management function, and for example configuration/parameter setting of BS 102 comprises the download of the code-guiding sequence P that the download, BS 102 of execution mode under the software conditions is known, and/or the new code-guiding sequence P ' and the P that generate " download.

According to the aspect of execution mode, the code-guiding sequence of newtype that is used to have the cordless communication network of mixed node is fabricated.According to the aspect of execution mode, new code-guiding sequence to some nodes as seen, and is and invisible to other nodes.According to the aspect of execution mode, new code-guiding sequence comprises two or more code-guiding sequences.In other words, Wireless Telecom Equipment is programmed the new code-guiding sequence of cross-correlation test that comes by in two or more the frame that separates.An execution mode is by generating sightless first code-guiding sequence of first node based on the existing code-guiding sequence at first node, and generate with first code-guiding sequence based on first code-guiding sequence and to have second code-guiding sequence that is low to moderate zero cross correlation, and in the communication link frame that replaces, first and second code-guiding sequences are broadcasted as pair of sequences, the new code-guiding sequence that comprises paired code-guiding sequence is provided.At paired code-guiding sequence P ', P " situation under, equipment can carry out cross-correlation based on two frames that separate, to comprise P ' alternately, P what receive ", P ', and P " signal on discern P ', P is " right.According to the aspect of execution mode, can be as required the introducing of new Wireless Telecom Equipment (for example according to) executable operations 202-206, operation 208-210 afterwards is performed to carry out radio communication according to application.Yet these execution modes are not limited to this structure, but can be according to using dynamically (in real time) executable operations 202-206 of criterion.

From describing the many feature and advantage that can know these execution modes in detail, therefore, the appended claims expectation covers all these feature and advantage that fall into the execution mode in its true spirit and the scope.In addition, because those skilled in the art will carry out many modifications and modification easily, therefore do not expect the working of an invention mode is limited to the precision architecture and the operation of explanation and description, so all suitable modifications and equivalent can resort to, fall in its scope.

Claims (21)

1. method that in cordless communication network, generates code-guiding sequence with first code-guiding sequence, this method comprises:

In frequency domain, generate second code-guiding sequence that has low cross correlation with described first code-guiding sequence;

Generate the 3rd code-guiding sequence based on described second code-guiding sequence, described the 3rd code-guiding sequence and described second code-guiding sequence have cross correlation very low even zero;

Described second code-guiding sequence of transmission and described the 3rd code-guiding sequence in the frame that alternates of described cordless communication network.

2. method according to claim 1 wherein generates the symbol that described the 3rd code-guiding sequence comprises one or more component in described second code-guiding sequence of upset.

3. method according to claim 2, the described symbol of described component of described second code-guiding sequence of wherein overturning comprises the symbol of the component that alternates of described second code-guiding sequence that overturns, or according to stochastic variable the overturn symbol of component of described second code-guiding sequence, perhaps their combination in any.

4. method according to claim 3, wherein according to independently generate with equal probability 1, the symbol of the component of described second code-guiding sequence of discrete random sequence randomly changing of+1}.

5. method according to claim 1, described method comprise also whether described the 3rd code-guiding sequence of checking and described first code-guiding sequence have lower cross correlation.

6. method according to claim 1, wherein:

Described wireless network is the mobile multi-hop network of WiMAX based on relaying, comprises one or more base station, one or more relay station and one or more mobile radio station, and

Described first code-guiding sequence is by described base station transmits, and can be by described relay station and the identification of described mobile radio station, and

Described second yard sequence and described the 3rd code-guiding sequence be by described base station transmits, and only can be discerned by described relay station.

7. method according to claim 1, described method also comprise by the received signal sampling in will two frames that separate corresponding with the described frame that alternates carries out cross-correlation, detects described second code-guiding sequence and described the 3rd code-guiding sequence.

8. method according to claim 7, wherein said first code-guiding sequence, described second code-guiding sequence and described the 3rd code-guiding sequence are based on orthogonal frequency division multiplexing radio communication system.

9. one kind for the cordless communication network with mixed node generates the method for the code-guiding sequence of newtype, and described method comprises:

Based on the existing code-guiding sequence that is used for first node, generate sightless first code-guiding sequence of described first node;

Based on described first code-guiding sequence, generate and to have low with described first code-guiding sequence even be second code-guiding sequence of zero cross correlation; And

In communication link frame that Network Synchronization needs or other times section, alternately broadcast described first code-guiding sequence and second code-guiding sequence.

10. method according to claim 9 wherein generates the symbol that described second code-guiding sequence comprises one or more component in described first code-guiding sequence of upset.

11. method according to claim 10, the symbol of component of described first code-guiding sequence of wherein overturning comprises the symbol of the component that alternates of described first code-guiding sequence that overturns, or according to stochastic variable the overturn symbol of component of described first code-guiding sequence, perhaps their combination in any.

12. method according to claim 9, wherein said cordless communication network carries out radio communication based on OFDM, and described first node is mobile radio station or portable station.

13. method according to claim 12, wherein said wireless network are the mobile multi-hop network of WiMAX based on relaying, comprise one or more base station and one or more relay station to one or more described mobile radio station or portable station, and

Described existing code-guiding sequence is transmitted by described base station, and can be by described relay station and described mobile radio station or the identification of portable station, and

Described first code-guiding sequence and second code-guiding sequence be by described base station transmits, and only to described relay station as seen, and invisible to described mobile radio station or portable station.

14. a device, this device comprises:

Store the computer readable recording medium storing program for performing of radio communication first code-guiding sequence; And

Controller, described controller

In frequency domain, generate the second radio communication code-guiding sequence that has low cross correlation with the described first radio communication code-guiding sequence,

Generate the 3rd radio communication code-guiding sequence based on the described second radio communication code-guiding sequence, described the 3rd radio communication code-guiding sequence and the described second radio communication code-guiding sequence have lower correlation, and

Transmission described second wireless code-guiding sequence and the described the 3rd wireless code-guiding sequence in the frame that alternates.

15. device according to claim 14 wherein generates the symbol that described the 3rd code-guiding sequence comprises one or more component in described second code-guiding sequence of upset.

16. device according to claim 15, the symbol of component of described second code-guiding sequence of wherein overturning comprises the symbol of the component that alternates of described second code-guiding sequence that overturns, or according to stochastic variable the overturn symbol of component of described second code-guiding sequence, perhaps their combination in any.

17. device according to claim 16, wherein according to independently generate with equal probability 1, the symbol of the component of described second code-guiding sequence of discrete random sequence randomly changing of+1}.

18. device according to claim 14, wherein said controller verify also whether described the 3rd code-guiding sequence and described first code-guiding sequence have lower cross correlation.

19. device according to claim 14, wherein said controller carries out radio communication to one or more relay station and/or one or more mobile radio station at WiMAX in based on the mobile multi-hop network of relaying, and

Described first code-guiding sequence can be discerned by described relay station and described mobile radio station, and

Described second code-guiding sequence and described the 3rd code-guiding sequence can be discerned by described relay station, and invisible to described mobile radio station.

20. device according to claim 19, wherein said first code-guiding sequence, described second code-guiding sequence and the 3rd code-guiding sequence are based on orthogonal frequency division multiplexing radio communication system.

21. the device with other node radio communications, this device comprises:

Controller, this controller

Search is to described device and to the visible first radio communication code-guiding sequence of described other wireless communication nodes; And

By the correlation peaks of search, search for the sightless a pair of second radio communication code-guiding sequence of described other wireless communication nodes in the radio frame signal of the two frame places collection that separates.

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