CN1461573A - Method of networking of cellular mobile communication system and its wireless transceiver - Google Patents
Method of networking of cellular mobile communication system and its wireless transceiver Download PDFInfo
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Abstract
A method of network of CDMA cellular mobile communication system and a wireless transceiver for carrying out the method, the core is: on the time axis, the spread spectrum symbols inside a subframe are separated by a zero element strain, length of sum of each spread spectrum and its corresponding zero element strain are not equal to each other and are different and inside a subframe of a different adjacent section/sector, distribute the different arrangement of said unequal and different sum length.
Description
The network-building method of cell mobile communication systems and its wireless L letter machines
Technical field more particularly to contains CDMA the present invention relates to one kind spread spectrum and digital multiple-access wireless communication technology any（OTMA the network-building method for the cell communication network) and in the radio digital communication system of spread spectrum applied and the radio receiving-transmitting unit for realizing this method.Background of invention is since the seventies, and mobile communication is by simple intercom system and single-frequency simplex dedicated system, and the Full-duplex cellular formula public communication network of net dial-up connection can automatically be fixed with ground by developing into.This communication network will complete the information transfer between multiple spot, can accommodate thousands of users, can be trans-city, trans-regional, or even transnational networking.Accordingly, it would be desirable to be designed to networking mode, to adapt to active demand of the information age people to wireless communication technology.
Traditional wireless multiple access access technology, such as FDMA (frequency division multiple access), TDMA (time division multiple acesses）, what its power system capacity was to determine, extra increase number of users is impossible.And CDMA is then different, with Large Copacity and the characteristics of soft capacity, its power system capacity has deadline not as F gangsters A or TDMA.
In CDMA（CTMA) in communication system, each user has oneself distinctive spectrum-spreading address code, for being mutually distinguishable.In general, it is in same cell（Or sector）It is interior, should be mutually completely orthogonal or close completely orthogonal between the spectrum-spreading address code of user.And in different districts（Or sector）Spectrum-spreading address code between user should have difference as big as possible.The requirement of orthogonality is all consistent for any multi-address system this signal different user
's.It is required that in different districts（Or sector）Spectrum-spreading address code between user has difference as big as possible, not just to be easy to recognize cell（Or sector）And user, and also for reduction neighbor cell（Or sector）Interfering between wireless user.Because in general a, subscriber station（Or base station）Except receiving this cell（Or sector）Base station (or subscriber station）Signal outside, can also receive neighbor cell（Or sector）Base station（Or subscriber station）Signal.
Existing radio CDMA cell mobile communication systems, includes the IS-95 systems and the W-CDMA system in Europe of North America, on cell networking, all carries out secondary spread spectrum from longer pseudo noise code.For example：It is that will be divided into the channel at many 1. 25 Should z intervals using frequency range in IS -95 forward channel designing technique, a channel is outputed in a cellular cell.Positive channel sets up Code Channel with the s h function codes of Wa 1 as address code.Each base station uses a pair of orthogonal pseudo noise code
(guiding PN sequences）Carry out four mutually to modulate, the guiding PN sequences of all base stations have identical to produce structure.But, the guiding PN sequences of different base station have different phase pushing figures.Mobile station distinguishes the signal sent by different districts or sector with different phase pushing figures.I.e. each cellular cell（Or sector）Base station receiver, by using same or the different offset phase sequences of several long pseudo noise code, is distinguished from different districts (or sector）Signal.Therefore, divided in CDMA positive logic channel, it devises a pilot channel
(Pi lot channel), what pilot channel was sent is a spread-spectrum signal for being free of data message, but includes guiding PN sequence phases offset and frequency reference information.Pilot channel is constantly sent always, and has the transmission level higher than other signals.After mobile station is completed with nearest base station synchronization using most strong pilot signal, it is possible to know guiding PN sequence phases offset and the relation of pilot signal strength.The phase pushing figure of pilot PN sequence represents certain base station
CDMA channels.In the beautiful A systems of C, frequency distribution has been converted to pilot PN sequence Offset Planning problem.
In IS -95 backward channel design, which employs identity code of the longer PN codes sequence as user.As utilized the long PN sequences with out of phase offset（242- 1) code is used as link address.Mechanism of the base station receiver with mobile subscriber's receiver when distinguishing different user is different, so also results in the system and necessarily requires in base station receiver and mobile station receiver while using two kinds of receiver technologies, causing hardware and software to complicate.
Utilize a long pseudo-random sequence（Long PN Sequence) different offset segments come to as user identity identification code method, although change will not be brought to the orthogonality between all subscriber signals in same cell, and between cell signal also due to the different skews of longer pseudo noise code and can distinguish.But, due to the introducing of the pseudo noise code so that have larger change between the correlation properties in same cell between simple channel code used and the correlation properties after secondary spread spectrum adds base station identity code.It is this to change the submaximum for being mainly reflected in correlation function（S idelobe) value changed.It is emphasized that simple channel code between correlation properties, except including the orthogonal property between channel code, also including the skew correlation properties between channel code.If adding base station identification information with the method for this secondary spread spectrum, as it was previously stated, can cause to change to the submaximum value of spreading code correlation function.If the need for system is due to performance, it is desirable to which, in some submaximum positions, the value of particularly main peak adjacent position does not change（It is best equal to zero）, then it will be unable to ensure this requirement that related submaximum is constant using the above method.
In a wireless communication system, diversity and propagation of the wireless signal due to propagation path
Between the complexity of condition, multiple Code Channels a receiver '（Or emitter）The differentiation at end, not only relies on the orthogonality between Code Channel, also relies on their skew correlation properties each other.In the patent of entitled " a kind of spread spectrum multi-address instruction codes method with zero correlation window "（PCT/CNOO/00028 a kind of CDMA schemes with zero correlation zone are refer in).In the invention, a kind of spread spectrum multiple address code is disclosed.Using the generation method of the spread spectrum multiple address code（Refer to the patent）, the auto-correlation and cross-correlation function of newly-generated spread spectrum multiple address code can be made to be formed about one " zero correlation zone " in origin, in " zero correlation zone ", multi-access inference（) and intersymbol interference MAI（ISI it is) zero.Therefore, Code Channel selected within cell code, each other with unique correlation properties.Correlation properties between channel code not only have complete orthogonality, and it is also fixed that it, which offsets correlation properties in certain skew interval,（For 0);Therefore；The scheme of the CDMA is highly suitable in the wireless communication system with multipath effect.
In order to be distributed the number of users of increase system in geographic plane, it is considered to there is the use of " the spread spectrum multi-address instruction code method of zero correlation window " in the cellular cell networking of cdma system using above-mentioned.If carrying out networking to wireless communication system using original technical scheme similar to IS-95 and W- CDMA, the zero correlation zone characteristic that the long pseudo noise code so introduced in each cell will be destroyed between cell ISN and code, the performance of system will deteriorate, and thus lose this superiority with zero correlation zone code division address code.It is an object of the invention to provide a kind of employing code division multiple access and the network-building method of the cellular radio Communication system of spread spectrum for the content of the invention.
The purpose of the present invention is furthermore that a kind of network-building method for the cellular radio Communication system for providing employing code division multiple access and spread spectrum, and the zero correlative window characteristic of the multi-address code with zero correlation window can not be destroyed in networking.According to an aspect of the present invention, there is provided a kind of network-building method of code vision multiple address cellular mobile communication system, its core is, on a timeline, between spread symbol inside subframe with zero element strain separately, each spread symbol and corresponding zero element strain and length（That is length sum）Each unequal and difference, and inside the subframe of different adjacent cells/sectors, distribute different each unequal and different and length the arrangements.
According to another aspect of the present invention, there is provided a kind of radio receiving-transmitting unit for realizing Group network methods Shang Yi, it can be base station or the mobile station of cellular wireless mobile communication system, including at least having, spread spectrum module is modulated, spread spectrum is modulated for the data to transmission；Despread and demodulator, despread-and-demodulation is carried out for the data to reception；Wherein further include, dynamic spread spectrum code generator, the modulation spread spectrum module and the Despread and demodulator are supplied to for generating spreading code, with the framing information according to residing cell/section, the zero element strain specified between the spread symbol inside subframe with the framing information is separately.The invention provides a kind of network-building method of the simple cellular wireless mobile communication system easily realized, it, which can be such that the interference level between adjacent cells/sectors has than existing system, significantly reduces.The present invention maintains the zero correlation zone characteristic of spread spectrum multiple access code in same cell while multi-cell system networking plan is solved.Due to maintaining zero correlation zone characteristic, so as to add the user's area coverage and number of users of cdma system；With above-mentioned parameter
Increase, by the unit area for the system that substantially reduces and the actual cost of unit user；The utilization rate of radio spectrum resources is improved, the total capacity of cdma system is also just improved, so that the wireless communication systems realized a Large Copacity, covered greatly.
Yet another advantage of the present invention is that, using the present invention, base station radio transceiver can design with mobile station radio receiving-transmitting unit with same technology, so that the hardware and software requirement of cylinder base station radio transceiver and mobile station radio receiving-transmitting unit significantly.Is the object, technical solutions and advantages of the present invention are more clearly understood in Brief Description Of Drawings, by the following examples, and with reference to accompanying drawing, to further detailed description of the present invention.Wherein
Fig. 1 shows a kind of cellular network Group into block diagram；
Fig. 2 shows a preferred embodiment of the radio receiving-transmitting unit of the present invention；Fig. 3 shows a kind of physical layer frame structure using network-building method of the present invention；Fig. 4 shows the length that zero element strain is inserted in a preferred embodiment according to network-building method of the present invention, the different subframe structures of Intra-cell；
Fig. 5 shows the geographical topological structure model of typical 7 cell wireless communication cellular network；Fig. 6 shows the symbol characteristic assessment figure of LA methods between two cells；
Fig. 7 shows a kind of 16 cell subframe structural scheme charts that arrangement is inserted with neutral element
Fig. 8 show be 16 pulse LA codes cycle and minimum interval.
The mode Fig. 1 for implementing the present invention shows a kind of compositional block diagram of cellular network.Fig. 1 is refer to, the main implementation steps of this method are as follows：Network activation or more new stage, mobile services switching centre MSC will be according to portfolio, the parameters such as class of business are converted the framing parameter sent according to base station controller BSC the spread spectrum code generator that specific subframe allocative decision is sent in base station controller BSC, base station transceiver BS accordingly.Mobile subscriber is accessed or during handover, corresponding dynamic framing information is obtained in the common control information that mobile transceiver MS is sent from base station transceiver BS, and these parameters are applied to the spread spectrum code generator inside the emitter of oneself and receiver, realize corresponding communication service.
Fig. 2 shows a preferred embodiment of the radio receiving-transmitting unit of the present invention.It refer to Fig. 2, in the receiving terminal of transceiver, collection of letters antenna 103 couples high-frequency modulation signal through coupler 104, down coversion is completed in carrier frequency unit 106, dynamic spread spectrum code generator 110 is according to CCCH receiving module 109 into frame control information, despreading is demodulated in demodulation device 108 to the information that carrier frequency unit 106 is exported, then output data；In transmitting terminal, dynamic spread spectrum code generator 110 is modulated in modulation frequency multiplier 107 to input data into frame control information according to CCCH receiving module 109 and spread, then radiofrequency signal is become through carrier frequency unit 1 05, after the Q4 of coupler 1, sent by transmission antenna 102.Master frequency generator 1 00, by clock list without 1 01 be carrier frequency unit 1 05,106 offer intermediate frequency reference sources simultaneously provide standard time clock for whole transceiver, CCCH receiving module 109 provides this information to dynamic spread spectrum code generator 110 from the rear end receiving common control channels information of carrier frequency unit 106.
Described dynamic spread spectrum code generator 110 is for each cell of dynamically distributes（Or sector）
Subframe internal structure, to complete the communication between different districts.In the present embodiment, framing information (the also distribution information including spreading code is obtained in the dynamic spread spectrum secondary common control physical channel receiving module 109 of code generator 110）.A kind of network-building method of code vision multiple address cellular mobile communication system of the present invention, core is, on a timeline, between the spread symbol inside subframe with zero element strain separately, each spread symbol and corresponding zero element strain and length（That is length sum）Each unequal and difference, and inside the subframe of different adjacent cells/sectors, distribute different each unequal and different and length the arrangements.It is wherein so-called with spread symbol " corresponding zero element strain ", the zero element strain of the spread symbol can be defined as following closely, the zero element strain before the spread symbol can also be defined within, a part for zero element strain before the spread symbol can also be defined within adds a part for the zero element strain for following the spread symbol closely, but the definition that should be met to " corresponding zero element strain " in the cell mobile communication systems is unified.Wherein so-called " and length " refers to spread symbol and the length sum of corresponding zero element strain.
It is preferred that described each unequal and different meets with length：Only one of which and length are any odd number more than minimum and length, and remaining and length are even number, and any one and length are not equal to other two or more and length sums.
It is preferred that the spread symbol described in subframe is extended by LS codes（LS codes will be discussed in detail later）.
It is preferred that the subframe of different districts/sector, with identical and fixed subframe lengths.It is preferred that the length of the spread symbol inside subframe is identical and fixed.
The present invention particularly reconfigures subframe structure, to realize the network-building method of new cellular mobile communications networks by reconfiguring frame structure on a physical layer.
When carrying out cellular radio Communication system networking in the prior art scheme, usually assume that the frame structure that the user between different cellular cells is used is consistent, subframe structure is also consistent, uniquely the difference is that different by the spectrum-spreading address code between exhibition symbol.It is of the invention then be it is thorough change subframe structure, and different subframe structures are distributed for different cell/sections, to reach the purpose for distinguishing different adjacent cells/sectors.
Specifically, the present invention carries out cell networking by changing the arrangement at the interval inside subframe between spread symbol.For example by using the Rational Arrangement to inserting Length discrepancy zero element strain between spread symbol in each cell signal, to reduce the complete collision probability of symbol between the signal code group of different districts, namely adjacent cell interference CI is reduced).
It is preferred that can be implemented on the premise of keeping subframe lengths constant by changing inside subframe being spaced between spread symbol.
Described escape character and the length of zero element strain, can be the spreading codes of regular length
, (such as LS codes）, the summation with the length of different length zero element strain.
Described escape character and the length of zero element strain or different length spreading code (such as LS codes）With the summation of different length zero element strain length, the length summation need to keep consistent with the length of the different interval of basic pulse.In a kind of Shen " blue or green number be PCT/CN98/00151, inventor's Li Daoben, entitled " spread spectrum multiple address code coding techniques, a PCT International Patent Application in, disclose a kind of expansion
The coding method of frequency multiple access code, this spreading code has good auto-correlation and cross correlation, for cylinder it is bright for the sake of, this spreading code is referred to as LA codes in the description of the invention below.
LA codes by normalization amplitude and width be 1, the basic pulse with polarity constituted, the number of basic pulse is according to required user's number, the number for the pulse compression code that can be utilized, the number for the orthogonal pulses compressed code that can be utilized, the number for the orthogonal frequency that can be utilized, system bandwidth, these practical factors determination of system maximum communication rate, interval of the basic pulse on time coordinate is not waited and different, is not waited and different pulse positions and pulse polarity arranging and encoding using this interval.Take the above to design, be that spread spectrum and digital multiple access technology provide a kind of concise, efficiently spectrum-spreading address code design method.The characteristics of LA codes is：First：The main peak of auto-correlation function is equal to the number of basic pulse, is also equal to the number of orthogonal code in code character, second：The submaximum of auto-correlation and cross-correlation function only has tri- probable values of+1, -1 and Q.The LA codes can be used to realize the identification to different districts.
It is related to the present invention, it is preferred that in same subframe, the described and length of each spread symbol and corresponding zero element strain can be obtained by LA codes.Each interval width that i.e. described and length is rushed using the basic ^ K of LA codes.In Application No. PCT/CN00/ 00028, inventor's Li Daoben, a PCT International Patent Application of entitled " a kind of spread spectrum multiple access coding method with zero correlation window ", disclose a kind of spread spectrum multiple address code with zero correlation window, referred to as LS codes, because LS codes are made up of C codes and S code two parts, therefore also known as CS codes, LS codes（CS codes）Generation method had a detailed description in PCT/CN00/ 00028, be omitted herein.The designed spread spectrum multiple address code with " zero correlation zone " has following two features：First：Each spread spectrum ground
The auto-correlation function of location code is zero everywhere in addition to origin, i.e., it has optimal characteristic.For the viewpoint of orthogonality, each spectrum-spreading address code with its own in addition at zero time delay, to any non-zero time delay all completely it is orthogonal.Second：There is one " zero correlation zone " near origin in the cross-correlation function between spectrum-spreading address code.Said from orthogonality viewpoint, it was completely orthogonal during " zero correlation zone " width to be less than between each spectrum-spreading address code in relative time delay.
In the case of using LS codes as spread spectrum multiple address code, if carrying out networking to wireless communication system using original technical scheme similar to IS- 95 and W-CDMA, the long pseudo noise code so introduced in each cell will destroy the zero correlation zone characteristic between LS codes and LS codes in cell, the performance of system will deteriorate, and thus lose this superiority with zero correlation zone code division address code.And the network-building method of the present invention, then it can avoid damage to the zero correlative window characteristic of LS codes.The superiority that LS codes have zero correlation window can thus be embodied.So as to simply realize more access code channels, and higher communication quality.Fig. 3 shows a kind of physical layer frame structure using network-building method of the present invention.Each frame is made up of+1 subframe, K=0,1,2 ... ... Ν, and what the SF* in figure was represented is a subframe.Wherein SF1, SF2 ... SFK each subframe again by m be expanded the symbol of code extension shown with CS and each symbol after zero element strain constitute.As shown in the subframe extension schematic diagram in figure, Reference character A, B, C, D, E, F, G, H, I, J, K, L, M, N, 0, P position represent the position of insertion neutral element, while each letter represents the length of insertion zero element strain respectively again.In description from now on, it is n to represent the zero element strain length at the A of position.CS in subframe represent one be expanded after symbol
Number, the symbol is extended by the CS codes that one is mentioned in " a kind of spread spectrum multi-address instruction code method with zero correlation window ", can be identical CS codes between the CS codes employed in a subframe or different CS codes.Moreover, the length between each CS can be with identical or difference.Based on the basis of frame structure described above, we further describe specific embodiments of the present invention.Fig. 4 shows the length that zero element strain is inserted in a preferred embodiment according to network-building method of the present invention, the different subframe structures of Intra-cell.In Fig. 4, two forms represent the length that zero element strain is inserted in the position of insertion neutral element, the different subframe structures of two Intra-cells are needed respectively.Cell A subframe insertion zero element strain length be respectively：0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,1;Cell B subframe insertion zero element strain length be respectively：2, 6, 10, 14, 18, 22, 26, 1, 0, 4, 8, 12, 16, 20, 24, 28;The length of cell C subframe insertion zero element strain is other arrangements different with B from cell A, and the length of zero element strain in subframes that is omitted at this both can be odd number or even number.In above-mentioned specific embodiments, in the zero element strain length of each cell subframe, only one of which is odd length, and other are all even lengths.But any combination Fig. 7 of the inventive method equally also comprising other odd lengths and even length shows a kind of 16 cell subframe structural scheme charts that arrangement is inserted with neutral element.In this structural scheme as embodiment, between 16 different districts, subframe lengths are all 2387 T C.
In view of LA codes, the present invention can be implemented as follows：
Choose a LA Ma Group.By taking 16 pulse LA code characters as an example, cycle and the minimum interval of the 16 pulse LA codes can have multiple choices.With reference to Fig. 8, Fig. 8 shows cycle and the minimum interval of 16 pulse LA codes.Using wherein minimum interval as 136, exemplified by the minimum period is 2387 orthogonal code sets.In the LA orthogonal code sets, each code word is made up of 16 basic pulses, and the interval between each basic pulse is respectively：136,138,140,142,144,146,148,150,152,154,156,160,162,164,137.In the present embodiment, by taking one of code word as an example, different districts are distinguished by changing putting in order for code word pulse spacing（Or sector）, i.e., for a code word with same polarity, by changing the different arrangement modes in its pulse spacing come to different districts（Or sector）Identification.
In order to improve the dutycycle of LA codes, dutycycle can be improved using CS codes.The change put in order to the pulse spacing with same polarity code word is realized by inserting Length discrepancy zero element strain between the symbol extended by CS codes.The CS codes are used to the symbol in expansion sub-frame.Can be identical CS codes between CS codes employed in one subframe or different CS codes.Moreover, length between each CS code can be with identical or differ.In the present embodiment, the length of the CS codes of selection is identical.Using length identical CS codes as extended code in the present embodiment, its length is 136.
It is preferred that frame structure can use with IS -95 identical frame structures, that is, take frame length be 20ms, with a width of 1.2288MHz.In the present embodiment, each frame is made up of 10 subframes, respectively SFO, SF1, SF2 ... ... SF9.Wherein, SF1, SF2 ... ... SF9 each subframe lengths keep constant.Extended in each subframe by above-mentioned LA codes, meanwhile, in each LA pulse spacing, by taking code 1 as an example, filled, accounted for improving with above-mentioned CS codes
Sky ratio.Length is used to be filled for 136 CS codes in the present embodiment.LA symbol intervals are identical with the symbol interval of CS codes, all with TcFor unit.
In order to be still able to the pulse spacing for keeping LA codes, it can be realized by inserting zero element strain behind the symbol extended by CS codes.For example, when the pulse spacing is 136,0 zero is inserted, when the pulse spacing is 138, the zero element strain of insertion 2 zero, when the pulse spacing is 140, the zero element strain of insertion 4 zero, the rest may be inferred.
, can be by inserting different zero element strains behind the symbol extended by CS codes, to realize the different arrangements in pulse spacing in order to realize that the difference in L A pulse spacings puts in order.For example, we can be using the spaced arrangement between spread symbol inside a kind of subframe, the zero element strain of length, 0 as being inserted respectively behind 16 symbols extended by CS codes, 2,4,6,8,10,12,14,16,18,20,22,24,26,28,1, a kind of spaced arrangement shown in NO. 1 in Fig. 7 is now just obtained, the arrangement mode is used as the identification of A cells；We can also insert the zero element strain of such length, 2,6 by Fen Do behind 16 symbols extended by CS codes, 10,14,18,22,26,1,0,4,8,12,16,20,28, a kind of spaced arrangement shown in NO. 2 in Fig. 7 is now just obtained, the arrangement mode is used as the identification of B cells.According to the method, other any one group of data in Fig. 7 can be may be used in the subframe building method of each other Intra-cell, to realize the difference between each cell between base station signal and mobile subscriber's signal.
The code length that basic CS codes are classified as in Fig. 7 is 136, can be respectively applied to 16 different districts（Or sector）Subframe arrangement in data.Per the basic CS codes of behavior from the length sum of different zero element strains, in the present embodiment, by taking the first row as an example, respectively 136,138,
140 ... 137, the number for illustrating the insertion zero element strain behind each symbol extended by CS codes is 0,2,4 ... ... 1.Often row can be used to a cell（Or sector）In.16 groups of data are listed in table altogether, this is the preferred embodiments of the present invention, it is characterized in that each row of data are different in table, i.e., in each cell（Or sector）Subframe same position at insertion zero element strain number be different.
As described above, in most common radiocommunication cellular network, by taking 7 cell patterns as an example, with reference to Fig. 5, any 7 groups of different data can be chosen in subordinate list, and by the subframe building method of these data applications to each Intra-cell, to realize cells of the difference between each cell between base station signal and mobile subscriber's signal using the present invention（Or sector）Networking plan, is effectively reduced adjacent area interference (ACI).Because the change at LA code basic pulses interval is had no substantial effect in same cell（Or sector）The correlation properties of interior CS codes, different districts（Or sector）CS codes related submaximum it is also smaller so that be effectively reduced adjacent area interference CI).Using the cell（Or sector）Network-building method, can make network-building method cylinder single, and it is easy to realize, from simulation curve, with reference to Fig. 6, and Fig. 6 is that the symbol characteristic of LA methods between NO. 1 and the cells of N0. 2 is assessed（Subframe zero offset）.Understand the beneficial effect of the little Qu Group net schemes of the present invention.The figure is described, and data are arranged using two groups of LA in NO. in Fig. 71 and NO. 2, is respectively used to A cells and B cells, and the user that investigated of A cells uses CS codes 1, and the interference subscriber signal of B cells uses CS codes 8.Wherein CS codes 1 and CS codes 8 are a pair of isometric orthogonal code sets according to " spectrum-spreading address code method with zero correlation zone " generation.Abscissa represents 16 of a sub- frame in by expansion symbol in 16 output times of correlation receiver in figure, indulges and sits
Mark represents the output valve in correlation receiver output time, and the value embodies the interference of being investigated user of the B area interferences user to A cells.As illustrated, the adjacent area interference of two cell is very small.This illustrates the beneficial effect of the network-building method of the present invention simultaneously.One of ordinary skill in the art is obviously clear and understands, embodiment provided above is not intended to limit the invention only to illustrate the present invention.The present invention, which can there is many ways in which, to be modified and improves, and in addition to the preferred embodiment specifically given of upper fan, the present invention can also have other many embodiments.Therefore, all category can obtain method or improvement according to present inventive concept, within the interest field that should be included in the present invention.
Claims (10)
- Claims1st, a kind of network-building method of code vision multiple address cellular mobile communication system, it is characterized in that, on a timeline, between spread symbol inside subframe with zero element strain separately, each spread symbol and corresponding zero element strain and length is each unequal and difference, and inside the subframe of different adjacent cells/sectors, distribute different each unequal and different and length the arrangements.2nd, the network-building method of code vision multiple address cellular mobile communication system as claimed in claim 1, it is characterised in that described each unequal and different meets with length：Only one of which and length are any odd number more than minimum and length, and remaining and length are even number, and any one and length are not equal to other two or more and length sums.3rd, the network-building method of code vision multiple address cellular mobile communication system as claimed in claim 1, it is characterised in that the spread symbol described in subframe is extended by LS codes.4th, the network-building method of code vision multiple address cellular mobile communication system as claimed in claim 1, it is characterised in that the subframe of different districts/sector, with identical and fixed subframe lengths.5th, the network-building method of code vision multiple address cellular mobile communication system as claimed in claim 1, it is characterised in that the length of the spread symbol inside subframe is identical and fixed.6th, the network-building method of code vision multiple address cellular mobile communication system as claimed in claim 1, it is characterised in that base station transceiver adds the framing information of this cell/section in CCCH, so that mobile transceiver is accessed or is switched.7th, the network-building method of code vision multiple address cellular mobile communication system as claimed in claim 1, it is characterised in that in network activation or more new stage, mobile services switching centre divides subframe The framing information that the dynamic spread spectrum code generator that formula case is sent in base station controller, base station transceiver is sent according to base station controller is converted accordingly；Accessed in mobile transceiver or during handover, framing information of the mobile transceiver in base station transceiver, complete access or handover.8th, a kind of radio receiving-transmitting unit being used in code vision multiple address cellular mobile communication system, including at least having, modulates spread spectrum module, spread spectrum is modulated for the data to transmission；Despread and demodulator, despread-and-demodulation is carried out for the data to reception；It is characterized in that further include,Dynamic spread spectrum code generator, the modulation spread spectrum module and the Despread and demodulator are supplied to for generating spreading code, with the framing information according to residing cell/section, the zero element strain specified between the spread symbol inside subframe with the framing information is separately.9th, radio receiving-transmitting unit as claimed in claim 8, it is characterised in that further include, CCCH receiving module, for the framing information in receiving common control channels, the framing information is supplied to described dynamic spread spectrum code generator.10th, radio receiving-transmitting unit as claimed in claim 8, it is characterised in that described spreading code is LS codes.
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| PCT/CN2000/000288 WO2002025965A1 (en) | 2000-09-25 | 2000-09-25 | A method of networking of cellular mobile communication system and its wireless transceiver |
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| CN100372248C (en) * | 2003-11-14 | 2008-02-27 | 华为技术有限公司 | Frequency hopping sequence generating method for realizing blue tooth cellural organized net |
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| GB2281477A (en) * | 1993-08-20 | 1995-03-01 | American Telephone & Telegraph | Operation of a CDMA net |
| JPH09327059A (en) * | 1996-06-07 | 1997-12-16 | N T T Ido Tsushinmo Kk | Cell selection method in cdma mobile communication system, its base station equipment and mobile station equipment |
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2000
- 2000-09-25 WO PCT/CN2000/000288 patent/WO2002025965A1/en active Application Filing
- 2000-09-25 CN CN00819808.XA patent/CN1243448C/en not_active Expired - Fee Related
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338961C (en) * | 2001-06-21 | 2007-09-19 | 中兴通讯股份有限公司 | Device and method for realizing network with mixed topology in mobile communication system |
Also Published As
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|---|---|
| AU2000275037A1 (en) | 2002-04-02 |
| WO2002025965A1 (en) | 2002-03-28 |
| CN1243448C (en) | 2006-02-22 |
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