CN101641874B - 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 amble sequence 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 do, 861 priority, relate to and require the U.S. Provisional Application 60/822 of submitting on August 18th, 2006,791 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

Often use lead code in wireless network, be used for carrying out time and 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.The first equipment, as wireless network infrastructure device (for example base station in cellular network), the code-guiding sequence of knowing to device broadcasts (transmission) in the fixed position of every frame periodically (usually in the starting position of frame, and being called as lead code).The 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 to for the Wireless Telecom Equipment of newtype, new code-guiding sequence be incorporated in wireless communication system.The possible cause that is necessary for the new code-guiding sequence of new equipment introducing is due to some restriction of system, to cause new equipment need to receive the code-guiding sequence different from 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 identify 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 be to provide any fixing of the Frame of radio transmission or known position broadcasting or transmission, coexist radio communication code-guiding sequence new and existing Wireless Telecom Equipment or synchronizing symbol (back be called code-guiding sequence or referred to as leading code), for example (be not limited to) lead code, middle leading code (midamble), rear leading code or their combination.

According to the aspect of execution mode, the existing leading code of wireless network broadcast (transmission) and new leading code are to support existing Wireless Telecom Equipment and new Wireless Telecom Equipment.Existing existing Wireless Telecom Equipment in other words should not obscured by the leading code that target is the new wireless transmission of new Wireless Telecom Equipment, perhaps should not identify or lock this leading code.

According to the aspect of execution mode, build 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, middle leading code, rear leading code, or any other special radio communication synchronizing symbol, these code-guiding sequences only can be by new Wireless Telecom Equipment identification, can not be identified by existing Wireless Telecom Equipment, so existing Wireless Telecom Equipment will can not obscured by new symbol.

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

Description of drawings

Fig. 1 is based on the figure of the mobile multi-hop residential quarter (MMR residential quarter) 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 residential quarter 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, namely generate sightless the first code-guiding sequence of first node based on the existing code-guiding sequence for first node, and based on the first code-guiding sequence generation and the first code-guiding sequence, low the second code-guiding sequence that even arrives zero (low to zero) cross correlation is arranged.The 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's 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 are specified the diverse network access criteria 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 via a plurality of shorter high quality link replacement base station (BS) of one or more relay stations (RS) and the long low quality wireless communication link between movement/subscriber station (MS/SS) (being called hereinafter MS), it can be the effective means that the WiMAX wireless cellular network improves user's signal quality.Because relay station does not require their wired backhaul, and usually do not have global function BS complicated, 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 user's service quality (QoS), and strengthens cell capacity.

Relaying technique can be according to IEEE 802.16 standards (be included in 802.16j relaying working group in).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 residential quarter (MMR residential quarter 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 having the new and cordless communication network existing (existing) Wireless Telecom Equipment that coexists.an illustrative embodiments generates the new code-guiding sequence that is used for WiMAX mobile multi-hop junction network (MMR residential quarter), in this network, relay station (RS) as the newtype Wireless Telecom Equipment is introduced into, and need to carry out radio communication by new code-guiding sequence with base station (BS) and/or other RS and synchronize, simultaneously such as mobile radio station (radio telephone for example, wireless personal digital assistant, wireless media player etc.) existing or existing wireless communication equipment should not obscured by the new code-guiding sequence that target is new RS, perhaps should not identify this new code-guiding sequence.

aspect according to execution mode, radio communication code-guiding sequence or synchronizing symbol (be called hereinafter code-guiding sequence or referred to as leading code) are the signals of any wireless transmission of using in cordless communication network, the modulation sequence of binary digit (typically, for example with 0,1 converts-1 to, + 1), pulse or their combination in any, be used to carry out the radio communication of any type for Wireless Telecom Equipment/system synchronous, be including but not limited to sign (network identity for example, identity of wireless device etc.), time and/or Frequency Synchronization, estimate (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 the first code-guiding sequence, and other Section Points can need the second code-guiding sequence, the first code-guiding sequence is invisible to Section Point simultaneously, and the combination in any of the first and second code-guiding sequences is visible and/or invisible to Arbitrary Digit destination node in mixed node.In an illustrative embodiments, Fig. 1 is the topological diagram with MMR residential quarter 100 of BS 102 and two relay stations (RS1 and RS2) 104a, 104b.BS 102 is directly 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 residential quarter 100 comprises the overlay area of BS 102 and all RS 104.

Based on use at the physical layer place access of OFDM/OFDMA wireless network and wherein the code-guiding sequence of the MMR residential quarter 100 that coexists of new Wireless Telecom Equipment (for example RS 104) and existing Wireless Telecom Equipment (for example MS 106) these execution modes are described.In Fig. 1, with OFDM or OFDMA system as embodiment, when new Wireless Telecom Equipment (for example RS 104) when being introduced into, BS sends/transmits for example old or existing code-guiding sequence P (being called existing lead code) of old lead code, as the 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.Fast fourier transform (FFT) size of supposing ofdm signal is N _FFT, and the number of the actual subcarrier that uses is N _USED, in frequency domain, existing lead code symbol only can be expressed as in the subcarrier that uses:

$P=[{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="H2007800307874E00011.png"\; state="\{\{state\}\}">P</figure-callout>}}_1,...,P_i,...,P_{N_{\mathrm{USED}}}]---\left(1\right)$

The component p of vector P _iIt is the plural number of the 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), i is the index of the OFDM/OFDMA subcarrier number of 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, the complex base band signal for time-domain signal of P can be:

$Q=\underset{i=1}{\overset{\mathrm{Nused}}{\mathrm{\&Sigma;}}}{P}_k{e}^{j2\mathrm{\&pi;k}\left(i\right)\mathrm{\&Delta;ft}}---\left(2\right)$

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 refers to, 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, leading code was basic identical in every frame.Equipment at different time (for example, adjacent downlink/uplink communication frame) collect wireless signal samples with the time window (time window has the length of code-guiding sequence) of formed objects, and these complex conjugate samplings are multiplied each other, carry 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 code falls into correlation window, equipment adjustment or be offset gradually its time window is until it detects the strong correlation peak value.This processing and utilizing the fact that periodically repeated of code-guiding sequence.Need further signal to process to determine to have sent which code-guiding sequence from the sequence sets of all definition.In other words, only in a plurality of frames, stronger correlation peaks (basic identical) can be indicated the code-guiding sequence that may receive, yet, at equipment, known (for example being stored in computer-readable medium) code-guiding sequence is carried out before further signal processes, what this equipment can not be distinguished transmission is 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, existing device can further be processed and distinguish new code-guiding sequence with the new code-guiding sequence of the scheme locking of describing before, execution, but only can determine this new code-guiding sequence and be unknown or unwanted, this has unnecessarily extended it and has been used for obtaining time with Network Synchronization.

Although described a kind of illustrative embodiments based on MMR residential quarter 100, these execution modes are not limited to this structure, and can be used for leading code is used for network identity and/or synchronous any cordless communication network.Aspect according to execution mode, a plurality of code-guiding sequences can be built and be broadcasted 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 the first code-guiding sequence, when the first equipment collection with its time window with the signal sampling that comprises the 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 (scope comprises zero) with the cross-correlation peak value of the second code-guiding sequence substantially, and therefore the second code-guiding sequence is transparent to the first equipment collection.Yet the second equipment collection can be programmed to locate and detect the first code-guiding sequence, the second code-guiding sequence, or their combination in any.

In cordless communication network, need to generate new lead code for any new equipment of introducing in cordless communication network (for example (but being not limited to) provides the RS 104 of MMR residential quarter 100), with time and the Frequency Synchronization of realization with new equipment, in described new lead code and consolidated network, existing lead code coexists simultaneously.Aspect according to execution mode, in MMR residential quarter 100, for RS builds new code-guiding sequence (the RS leading code in Frame), this code-guiding sequence is sent by BS 102 and/or main RS104 (being not limited to), and can be included from RS 104 in interior RS 104 identification (namely having main RS to the link of other RS), and be transparent to the MS106 as existing equipment or existing equipment.Existing equipment such as MS 106 can only be designed to synchronize with existing lead code, and they should not obscured by the new preamble take RS 104 as target.According to the aspect of execution mode, can be by the existing code-guiding sequence of various Wireless Telecom Equipments broadcasting, new code-guiding sequence or their combination in any.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 new leading code (for example new lead code) to existing equipment with new lead code as follows:

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 ':

$P^{\&prime;}=[{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="H2007800307874E00011.png"\; state="\{\{state\}\}">P</figure-callout>}}_1^{\&prime;},...,P_i^{\&prime;},...,P_{N_{\mathrm{used}}}^{\&prime;}]---\left(4\right)$

Generate P ' and P and " when (being described below), can consider other requirements, for example the papr of leading code signal (PAPR).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 in the second code-guiding sequence P ' (upset, change) (for example the polarity by upset the second middle component of code-guiding sequence P ' (for example by the second code-guiding sequence P ' that alternately overturns polarity)), generate or build the 3rd code-guiding sequence P ":

$P^{\&prime;\&prime;}=[{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="H2007800307874E00011.png"\; state="\{\{state\}\}">P</figure-callout>}}_1^{\&prime;\&prime;},...,P_i^{\&prime;\&prime;},...,P_{N_{\mathrm{used}}}^{\&prime;\&prime;}]---\left(5\right)$

P″ _i＝(-1) ⁱP′ _i，1≤i≤N _USED (6)

Upset p ' _iPolarity refer to 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." can have quite low with the second code-guiding sequence P ' be even zero cross correlation in the situation that alternately change the polarity of the position of the second code-guiding sequence P ', the 3rd code-guiding sequence P.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) build 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,

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

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

Whether operation 206 checking P " whether also have lower cross correlation with P, and checking P ' and P " satisfy other requirements (embodiment of these requirements can be that the papr 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 satisfy any requirement of operation 206, can come repetitive operation 202-206 by find out another code-guiding sequence P ' that has low cross correlation with P at operation 202 places.Aspect according to execution mode, " requirement all be satisfied, at operation 208 places; can be with the second and the 3rd code-guiding sequence P ' and P such as the wireless device of BS " (as to) if at operation 206 places, P ' and P, in frame or synchronous processing need to other periods in alternate transmission.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 " having very low is even zero cross correlation; the existing equipment (MS 106) of therefore searching for code-guiding sequence by carrying out cross-correlation (namely; old equipment carries out cross-correlation with signal sampling r (t) and the r (t+T) that receives) between the signal in consecutive frame will not observe correlation peaks, can't detect in other words P ' and P ".Fig. 2 B is the figure according to the Frame in the MMR residential quarter of execution mode.In Fig. 2 B, at operation 208 places, in downlink communication chain circuit-switched data frame (downlink/uplink subframe) 220, " code-guiding sequence alternately is transmitted in frame as the P ' of rear leading code and P.Execution mode is not limited to Fig. 2 B, and P ' and P, and " can be transmitted by various Wireless Telecom Equipments and the lead code of identifying, middle leading code and/or rear leading code, they are sightless to being similar to other Wireless Telecom Equipments that have MS 106 now simultaneously.

At operation 210 places, it is by signal r (t) that it is received and r (t+2T that new equipment can obtain with a kind of exemplary approach of synchronizeing of 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 with signal process to identify leading code to (P ', P ").For example, in Fig. 2 B, in this manner, the new equipment of any expectation (being in the present embodiment RS 104) can be identified new rear leading code P ' and P " and synchronize with them; and rear leading code P ' and P can not identified or lock to existing equipment (for example MS 106) will when searching for the processing of equation (3) ", and continue search until lock onto existing or existing lead code P.At operation 210 places, the mode that new equipment is located the position of the second or the 3rd code-guiding sequence is that the signal sampling in two frames that separate is carried out cross-correlation.

Because existing equipment has been ignored this new leading code pair, 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; because P and P ' (lower cross correlation between or P ") will not be so existing equipment will can be observed stronger correlation peaks.If existing equipment calculates the autocorrelation of signal r (t) and r (t+T), 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 can't detect 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 leading code and new leading code, and existing equipment only can detect existing lead code.For example, existing equipment will only be synchronizeed with existing lead code, and new equipment has the selection of synchronizeing with 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 build other special periodicity symbols, for example (be not limited to) to be used for the leading code of device synchronization and channel estimating.

The one side of execution mode disclosed herein is to provide coexist radio communication code-guiding sequence new and existing Wireless Telecom Equipment or synchronizing symbol (back be called code-guiding sequence or referred to as leading code), 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, middle leading code, rear leading code or their combination.

Fig. 3 generates the functional block diagram of the device of code-guiding sequence according to execution mode.In Fig. 3, device can be code-guiding sequence to be carried out any computing equipment of 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 showing the display 302 of 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, the wired/wireless communication network unit communication that perhaps 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 (be not limited to) MMR residential quarter 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 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.That generation coexists is existing/and the execution mode of the code-guiding sequence of new 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, such as carrier wave or electromagnetic signal etc.) and/or any computing hardware.Code-guiding sequence P ' and the P of generation coexists existing/new equipment " execution mode can be included in the MAC layer 404 with physical layer 406, in target radio network node (for example in BS 102 and/or RS 104) transmission and/or receive (search) coexisting code-guiding sequence P ' and P ".In Fig. 4, typically (not limitedly), network layer 403 provides the wired and/or radio communication access to the individual/public network (for example internet) different from target radio network (for example (be not limited to) MMR residential quarter 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 download, the BS 102 of execution mode under 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 for having 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 by the new code-guiding sequence of cross-correlation test in two or more the frame that separates.An execution mode is by generating sightless the first code-guiding sequence of first node based on the existing code-guiding sequence for first node, and have with the first code-guiding sequence the second code-guiding sequence that is low to moderate zero cross correlation based on the first code-guiding sequence generation, and in the communication link frame that replaces, the 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 identify 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 scope.In addition, because those skilled in the art will easily carry out many modifications and modification, therefore do not expect the working of an invention mode is limited to 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 generates code-guiding sequence in the cordless communication network with first code-guiding sequence, the method comprises:

Generate the second code-guiding sequence that has low cross correlation with described the first code-guiding sequence in frequency domain;

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

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

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

3. method according to claim 2, the described symbol of described component of described the second code-guiding sequence of wherein overturning comprises the symbol of the component that alternates of described the second code-guiding sequence that overturns, or according to the symbol of the component of described the second code-guiding sequence of stochastic variable upset, 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 the 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 the first code-guiding sequence have lower cross correlation.

6. method according to claim 1, wherein:

Described cordless communication network be WiMAX based on the mobile multi-hop network of relaying, comprise one or more base station, one or more relay station and one or more mobile radio station, and

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

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

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

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

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

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

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

Each code-guiding sequence in the communication link frame that replaces that Network Synchronization needs or other times section in a pair of described the first code-guiding sequence of broadcasting and the second code-guiding sequence.

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

11. method according to claim 10, the symbol of component of described the first code-guiding sequence of wherein overturning comprises the symbol of the component that alternates of described the first code-guiding sequence that overturns, or according to the symbol of the component of described the first code-guiding sequence of stochastic variable upset, 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 cordless communication network be WiMAX based on the mobile multi-hop network of 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 the first code-guiding sequence and the second code-guiding sequence be by described base-station transmission, and only to described relay station as seen, and invisible to described mobile radio station or portable station.

14. a device that generates code-guiding sequence in the cordless communication network with first code-guiding sequence, this device comprises:

Generate the module that has the second code-guiding sequence of low cross correlation with described the first code-guiding sequence in frequency domain,

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

The module of each code-guiding sequence in the frame that alternates of described cordless communication network in a pair of described the second code-guiding sequence of transmission and described the 3rd code-guiding sequence.

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

16. device according to claim 15, the symbol of component of described the second code-guiding sequence of wherein overturning comprises the symbol of the component that alternates of described the second code-guiding sequence that overturns, or according to the symbol of the component of described the second code-guiding sequence of stochastic variable upset, 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 the 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 the 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 the first code-guiding sequence can be identified by described relay station and described mobile radio station, and

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

20. device according to claim 19, wherein said the first code-guiding sequence, described the 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 wireless communication node radio communications, this device comprises:

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

The correlation peaks of the radio frame signal of collecting at the frame place that replaces by search, search for the module to sightless a pair of the second radio communication code-guiding sequence of described other wireless communication nodes and the 3rd radio communication code-guiding sequence,

Wherein generate described the second radio communication code-guiding sequence in frequency domain, described the second radio communication code-guiding sequence and described the first radio communication code-guiding sequence have low cross correlation, and generate described the 3rd radio communication code-guiding sequence based on described the second radio communication code-guiding sequence, described the 3rd radio communication code-guiding sequence and described the second radio communication code-guiding sequence have very low even zero cross correlation.

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