CN1610445A - Expansion method for broadcasting / multibroadcasting service index signal compatible to traditional mode - Google Patents
Expansion method for broadcasting / multibroadcasting service index signal compatible to traditional mode Download PDFInfo
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Abstract
The present invention is method of containing information state number inside signal for expanding traditional tie-station in energized tie-station. Through tristate transformation, the excessively expanded information state may be used in carrying broadcast/multicast service index, and the tristate transformation includes double phase deviation process and zero amplitude. One signal, such as fast calling information, is selected. The subunit is then complementarily transformed. The present invention makes it possible for the energized tie-station to detect new information, such as broadcast/multicast service index, in the method compatible with traditional tie-station.
Description
Technical field
The invention relates to wireless telecommunication system, particularly about promoting the signal and the agreement of data efficiency of transmission in the wireless telecommunication system.
Background technology
The content that the present invention discussed normally is applied to wireless telecommunication system, yet, the present invention is applied to cellular (cellular) wireless telecommunication system, this kind cellular-based wireless communications system can provide at a high speed and link, and can be applicable to single-point between single-point with data and the voice transfer of single-point to multi-point.The first generation is analog to be to see through portable honeycomb phone to carry out speech communication with the main application digital cellular-based wireless communications system of the second generation, thereby this type systematic is absorbed in accessing property and the efficiency of transmission of keeping speech communication.Behind the Internet universalness, industrial quarters just proposes can be than the first generation and the second-generation system third generation wideband multimedia cellular-based wireless communications system of data transmission and voice simultaneously more at a high speed.
Third generation partner second by name of industrial quarters tissue plans (Third GenerationPartnership Project 2, mechanism 3GPP2) is so that be commonly called the standard that sign indicating number divides multiple access 2000 (CDMA2000) for third generation sign indicating number divides multiple access type wireless telecommunication system to define a cover, wherein, one version of this standard is called " sign indicating number divides multiple access 2000 first generation D versions ", and (sign indicating number divides multiple access 2000 1x Revision D, or be called as sign indicating number and divide multiple access 2000 Release D, IS-2000-D, IS-2000-Rel.D).Above-mentioned " sign indicating number divide multiple access 2000 first generation D versions " planning to obtain from third generation partner second can be in this reference as third generation wireless telecommunication system communications protocol of the present invention.
Recently, third generation partner second plans to receive many being applied to communications protocol motion of " sign indicating number divides multiple access 2000 first generation D versions ", above-mentioned communications protocol motion comprises simultaneously from a base station (BS, base station) is sent to a mobile station (MS, mobile station) forward direction (forward) links transmission, and links transmission from anti-reverse (reverse) that delivers to a base station of a mobile station.Wherein, one need involve from a base station in while multicast (multicasting) signal to a group mobile station than new feature.Desire to reach above-mentioned purpose, then must in time notify or wake (wake up) in dormant mobile station so that receive multicast signals.To be used in the one or more broadcast index (broadcast/multicast service indication) in the short calling channel (QPCH, quick paging channel) in the above-mentioned recent motion of receiving.Above-mentioned sign indicating number divide multiple access system than there being this kind short calling channel in the older version already.
Please refer to shown in Figure 1ly, it is that several that depict above-mentioned short calling channel are showing a schematic diagram of feature.For example in one yard branch multiple access system, a short calling channel can be defined by 64 certain orthogonal sign indicating number (orthogonal code) by a group length.One short calling channel framework (frame), 102 length are 40 microseconds (ms), and the common voice framework that is 20 microseconds with two length aligns.Above-mentioned short calling channel framework 102 is split into 192 different time slots (timeslot) usually, each time slot is all kept a kind of known relationship with system's clock pulse of above-mentioned 20 microsecond length, and the said system clock pulse is also kept a kind of known relation with employed base station steering signal (pilot signal).Suppose that above-mentioned short calling channel framework 102 has 192 time slots, and each mobile station in 192 mobile stations all has the connection relationship of a uniqueness with above-mentioned each time slot, then can make a short calling channel framework 102 serve 192 different users simultaneously.Yet, seeing through hash (hashing) agreement, specific time slot may be linked to a plurality of different mobile stations simultaneously, and in view of the above, this time slot can be considered the calling index.Above-mentioned hash agreement is for known, and it simplifies event edge, does not add detailed description at this.In sum, in this specification, each time slot of above-mentioned calling channel framework is uniquely to be linked to a specific mobile station, and above-mentioned connection relationship may be increased with the program of hash agreement and so on.
The specific time slot of this short calling channel framework 102 links many mobile stations.Each mobile station must be analyzed the signal of a suitably relevant time slot that is positioned at this short calling channel framework 102 at least to resolve the message of this short calling channel framework 102.For traditional (legacy) mobile station, above-mentioned signal is only for opening (on) or closing (off) two states.Signal in the suitably relevant time slot of this short calling channel framework 102 provides one to call out index (PI, page indication), after receiving above-mentioned calling index, a tradition (legacy) receiver will be then decoded so that understand correlative detail about this calling to message after a while.If in above-mentioned suitably relevant time slot, can not find above-mentioned signal, then represent this signal for closing, in view of the above, before calling out next time, this traditional receiver will be kept motionless.As shown in Figure 1, in each framework, have 15 different time slots and be positioned at opening, that is in above-mentioned time slot, transmit signal on one's own initiative.Above-mentioned time slot is represented with 15 little vertical squares 104 (in short calling channel framework 102) and 108 (in short calling channel frameworks 106).
For increasing reliability, above-mentioned whole short calling channel framework 102 will be repeated to transmit and form short calling channel repetition framework 106 second time.The relative position of 15 time slots 108 that this short calling channel repetition framework 106 initiatively transmits is same as 15 time slots 104 of above-mentioned first framework 102.Its convenient and custom of edge is so keep identical relative position.
In above-mentioned motion, generally include in each framework about the mode that in the short calling channel, adds broadcast (BCMCS, broad-cast/multi-cast service) index and to keep the minority time slot and think that some mobile station provides the multicast index.Each index can be shared by the mobile station that is positioned at same multicast group (group), and the mobile station that can will be dispensed to this short calling channel framework of binding for the time slot of utilization is to provide above-mentioned mobile station all broadcast indexs.For example, one multicast time slot of another ad-hoc location 112 representatives that one specific action platform may be linked to a short calling message of an ad-hoc location 110 representatives simultaneously, share with other mobile stations, and be linked to a broadcasting time slot of another ad-hoc location 114 representatives that all mobile stations of short calling channel framework share with all.
Above-mentioned motion is easier to be implemented on traditional mobile station of falling behind, and system controller or base station only need be avoided that traditional mobile station is linked to those and keep the time slot of giving the broadcast index.Yet above-mentioned motion will cause harmful effect to the stand-by time of idle device.Shown already that shared broadcast index very likely showed the stand-by time of minimizing one receiver that lands.For example, please refer to creator Qian Feng of the present invention people such as (Feng Qian) and submit to the motion " broadcast index " that third generation partner second plans, motion is numbered C30-20031208-xxxx, and its whole content will can be used as reference of the present invention.At first, most of mobile stations only need 2.5 microseconds can wake up (wakeup), check signal, then enter resting state again.Yet, if will in same short calling channel framework, check two different time slots, for example above-mentioned time slot 110 and 112, the number of times that mobile station must be waken up will increase to twice.When mobile station was initiatively monitored frequently time slot of the short calling that is assigned with, because of the circuit of radio part consumes 50% to 75% electric power approximately, in view of the above, it was to help to promote stand-by time that the time that mobile station is initiatively monitored reduces to minimum.
Moreover, because of system only can provide a few multicast time slot position, in view of the above, adhere to the mobile station of different multicast group separately and must share above-mentioned several multicast time slots position, and then cause many mobile stations to receive its not broadcast index of receiving of desire, cause above-mentioned mobile station to be waken up and carry out extra message decoding action.The mobile station that is waken up only can be after decoding to extra message, and the beginning can learn that These parameters is that this action platform is delivered in non-tendency to develop, and above-mentioned unnecessary clear-headed and time of reception all will reduce the standby energy of mobile station.
On be set forth in and keep the motion that time slot is made for the broadcast index in the short calling channel, reflect that the signal of a kind of capacity that increases of needs uses for new-type mobile station, and can keep the compatibility of conventional table (no matter being mobile station or base station) simultaneously.The above has illustrated the reason of needing this method badly.
Summary of the invention
The object of the present invention is to provide a kind of traditional approach that is compatible to be used for broadcast index signal amplification method.
For achieving the above object, the present invention is exposed in the wireless telecommunication system, connects the method for interstation amplified signal capacity in newer biography, and the method can be kept the tradition that lacks above-mentioned signal volume ability simultaneously and pass the compatibility that connects platform.For being provided in the broadcast index of specific action platform in one yard branch multiple access system, message in a short calling channel must be expanded to behind double phase shift method modulation "+"/three kinds of information states of " closing "/"-" from traditional binary " unlatching "/" closing " information state.The various improvement of said method can be applicable to substantially the signal volume that the new-type biography of (substantially) amplification connects interstation, also keep simultaneously with tradition and pass the compatibility that connects the many unlike signals of interstation.
Select to be connect the classical signal unit that platform is considered as one of two or three information state by the tradition biography above-mentioned being comprised by method provided by the present invention, and it is divided into sub-cell, then a pair of each sub-cell with above-mentioned two anti-phase phase modulation value "+"/"-" carries out modulation, with the combination at above-mentioned sub-cell definition multiple phase modulation.Then, said method continues to find out the combination of a plurality of different modulations, and tradition passes the difference that the conventional process method that connects platform can't be differentiated these a plurality of modulations combinations, connects the distinguishable difference that goes out these a plurality of modulations combinations of platform yet energized to pass.At last, the method utilizes these a plurality of modulation combinations to transmit message, connects platform different information states is sent to energize to pass.A kind of version of said method will be specially adapted to receiving platform, and another kind of version then is specially adapted to transfer station.
Above-mentionedly also be contained in a tradition by method provided by the present invention and pass the identification one information state in the platform that connects, this information state is not for receiving the information state of classical signal unit representative on the time point of a decision in advance.Said method can also comprise the modulation combination and zero amplitude combination that utilizes different sub-cells, energized in one and to have identified the different information state of three kinds of conditionitys (conditionally) in the receiving platform, and these three kinds different information states only are regarded as a kind of information state in a traditional receiving platform.Above-mentioned signal element may be the short calling message in the short calling channel.In this system, carry out timesharing (time dividing) with the one first traditional short calling message that is sent to a specific action platform become two sub-cells above-mentioned can also being comprised by method provided by the present invention, and preceding half a message sub-cell of this short calling message is carried out the essence phase modulation, make its phase place that the phase place of a later half message sub-cell of short calling message is opposite therewith, form the different modulation combination of conditionity in view of the above.Then, the method can also comprise carries out otherness (differentially) modulation to one second traditional short calling message in next short calling framework of this short calling channel, and be sent to above-mentioned specific mobile station, can pick out this extra information state to set up the feasible receiver of having energized of at least one extra conditionity information state, yet traditional receiver will be despite this extra information state.In any case, have at least an extra conditionity information state can provide a broadcast index to be sent to the receiver of having energized, and above-mentioned extra conditionity information state will not provide index when being sent to a traditional receiver.
Description of drawings
Fig. 1 is in a pair of short calling channel framework, represents a clock pulse schematic diagram of traditional short calling message;
Fig. 2 is in two short calling channel frameworks, and a signal square block schematic diagram of the short calling message of a certain certain conventional mobile station is delivered in tendency to develop;
Modification place of the short calling message shown in Fig. 3 depiction 2 to be compatible to the mode of traditional mobile station, is carried new message to the mobile station of energizing;
Fig. 4 one illustrates different changing modes in the relation table of traditional receiver with the detecting probability of the receiver of having energized;
Fig. 5 is the relation table of a subclass shown in Figure 4, and it illustrates ternary changing mode;
Fig. 6 is the relation table of a subclass shown in Figure 4, and it illustrates four attitude changing modes;
Fig. 7 is the relation table of a subclass shown in Figure 4, and it illustrates five attitude changing modes; And
Fig. 8 is the relation table of a subclass shown in Figure 4, and it illustrates certain part of five attitude changing modes and certain the changing mode mutual exclusion shown in Fig. 7, and the symbol sequence in " repetition " framework in the mutual exclusion changing mode is opposite.
Embodiment
Outline
Some communication system as optical fiber or microwave relay etc., when need improvement upgrading, must place under the control of single individuality (entity).In view of the above, all elements of said system may change simultaneously, and this kind upgrading mode provides huge improvement elasticity so that improve its performance.In many other systems, as cellular communication system, the owner of system element may be dispersed to some individualities, has perhaps installed inconvenience all elements of upgrading simultaneously because of system.
Therefore, once be upgraded to the system element of all existence simultaneously or be improved usually not too convenient; In addition, people wish can promote its performance when new element adds system.If when adding new feature in the above described manner in new system element, it is very helpfully that this new system element can be kept oppositely compatible (backwardcompatible).Consider that the biography in cellular communication system connects platform (as mobile station and base station), need can carry out communication to the base station of same this new feature of support in (enabled) mobile station of energizing that adds new feature.One has energized passes that to connect platform be to connect platform for a biography that is set in order to use new signal.The above-mentioned transfer station of having energized comprises the module that can suitably produce and transmit new signal, and this has energized to pass and connect platform and can detect, differentiate new signal, and corresponding new signal is to carry out the module of suitable action.When connecing the platform communication, then hope the performance of the above-mentioned mobile station of having energized identical, similarly, also hope the performance of the base station of having energized to be same as traditional base station with traditional mobile station with the tradition biography.
Enabling new feature in a communication system involves usually and passes the new signal message connect between the platform.Yet, can be to belong to limitedly for the frequency range of communication or frequency range, more be not in harmony and work as to consume extra frequency range if only add new signal.The another way that obtains new signal message ability is to revise existing message.It seems that by not showing the viewpoint that increases the frequency range consumption aforesaid way has suitable attraction, become more complicated but keep reverse compatible ability.
Be used for the amplification of the short calling channel of broadcast index
Traditional sign indicating number branch multiple access biography connects platform and all supports the short calling channel.The short calling message that is sent to a plurality of different mobile stations (about 190) may be distributed in two paired short calling channel frameworks that last 40 microseconds.Above-mentioned short calling message must not consume system's frequency range (that is frequency spectrum utilization rate) in a large number and can improve to carry more a kind of classical signal of multiple message.A kind of general feasible method is to make energizing to pass connecing platform and the revision of above-mentioned classical signal is used for two has energized to pass and connect between the platform so that the signal capabilities of amplification to be provided, and still can keep original function and pass to connect between the platform in tradition.The amplification that passes the short calling channel signals ability between the platform that connects in energizing can utilize above-mentioned common practice or utilize a kind of three-state (tri-state) amplification method, also or both and use.
Because of the circuit of radio part consumes 50% to 75% electric power approximately, in view of the above, it is quite important that the time that mobile station is initiatively monitored the calling time slot that is assigned with reduces to minimum.The operation of general mobile station monitoring short calling channel comprises the following step: the relative position that (i) calculates the calling index conventional letter in the long framework of above-mentioned 20 microseconds that distributes in advance; (ii) the suitable moment before the calling index location that aforementioned calculation gets wakes up, so that setting wireless electricity phase-lock loop (PLL, Phase LockLoop) and automatic gain control circuit (AGC, Automatic Gain Control); (iii) revise time-pulse error etc.Carry out above-mentioned steps (i) to step (iii) must the time one to two microsecond.Then, above-mentioned mobile station will carry out (iv) above-mentioned calling indicator message or symbol being carried out Xie Zhanpin (de-spread) and decoding, its microsecond that is no more than consuming time; (v) close all radio and receiving circuit, carry out relevant the decision-making, and carry out other internal affairs that need arrangement actions (housekeeping), wake up next time in moment etc. then such as calculating in background.In view of the above, in the short calling channel framework that lasts 40 microseconds, be four microseconds the average time that mobile station is initiatively monitored the short calling channel.
With reference to shown in Figure 2, it is the thin portion enlarged diagram of the paired short calling message 116 shown in Fig. 1 and 118.Above-mentioned two messages all tendency to develop are delivered to a specific action platform (for convenience of description, this specific action platform is one first mobile station).Time point 202 as reference usefulness is initial moment of the above-mentioned first short calling channel framework 102, represents with t0, and similarly, another is initial moment of the above-mentioned second short calling channel framework 106 with the reference time point 204 that t0 represents.Bits (chip) when all having 2N in above-mentioned each short calling message 116 and 118 the time slot, for example N may be 64.In view of the above, this short calling channel can a group length be defined by 64 orthogonal code, and each short calling message then can comprise the length of two orthogonal codes.Above-mentioned short calling message 116 and 118 is successively to be distributed in this two short callings channel framework 102 and 106 with the time difference, is detected by mobile station effectively guaranteeing, and forms a short calling message to (pair).Above-mentioned short calling message 116 starts from the tA behind this t0202, and above-mentioned short calling message 118 starts from the tB behind this t0204.As previously mentioned, for simplicity, all suppose tA=tB usually, only must safeguard a time reference value, yet the mobile station of reception message only be must know rough position, must not keep so high precision between tA and the tB so desire receives the mobile station of this short calling message.In any case in legacy system, above-mentioned two paired short calling messages are for repeating redundant, provide identical information to same mobile station strengthening laser propagation effect, but not provide new information.
Specific short calling message can be sent to more than one mobile station, and when the mobile station quantity that needs call service surpassed the quantity of available short calling channel processing, above-mentioned mobile station can be dispensed to specific short calling message time slot according to hashing.Existing many known technologies provide the addressing of more mobile stations, compare its existing definite opinion in good and bad place with above-mentioned absolute addressing method.Yet, for making things convenient for mobile station and short calling channel are discussed in herein, the two relation will be regarded as one to one.In fact, a message is received by one or a few mobile station that there is practically no difference, because this message still can be transferred into " a specific action platform ".Other mobile stations that receive same message may learn that just the message that receives not is to be assigned to this action platform after decoding.
To being less than in some traditional mobile station, come across a signal of short calling channel, it starts from apart from the tA206 place of t0202 and bits when extending 2N (for example 128 time bits) length, this signal will be read as a short calling message that gives certain specific action platform, and above-mentioned short calling message also is positioned at the tA206 place of t0202.If in accurate moment of above-mentioned short calling channel received signal not, above-mentioned same mobile station will be considered as the signal of one " closing " state.In view of the above,, two kinds of signal conditions are arranged to above-mentioned same mobile station, that is " receiving " and " not receiving " two states " unlatching " and " closing " to represent this short calling message.
Please refer to shown in Figure 3ly, it is depicted above-mentioned short calling message 116 and is divided into a sub-cell A302 and another sub-cell B304, and above-mentioned short calling message 118 is divided into the thin portion schematic diagram of a sub-cell C306 and another sub-cell D308.When being all N, the length of each above-mentioned sub-cell considers to be worth doing.For guaranteeing the detecting of signal, tradition pass connect platform will be in addition average for the signal that is detected in the above-mentioned sub-cell A302 time and the signal that is detected in the above-mentioned sub-cell B304 time, and then obtain preferable short calling message 116 estimated values.Similarly, above-mentioned sub-cell 306 and 308 is also by on average to obtain the preferable estimated value about above-mentioned short calling message 118.In like manner, some traditional mobile station so that with above-mentioned whole short calling message 116 estimated values with in addition average about the estimated value of short calling message 118.
In the mobile station of newly energizing, above-mentioned each sub-cell A, B, C, with D individually modulation (modulated) as use double phase shift method (BPSK, binary phase shifting key) that above-mentioned each sub-cell is carried out modulation for amplified signal capacity usefulness.After a mobile station of having energized is separated modulation (demodulated) to the sub-cell of each reception, can obtain one "+" phase place or one "-" phase place.Fig. 4 further illustrates one and adopts double phase shift method in each sub-cell A, B, C, form with D information state, this form illustrates the result of a tradition (1egacy) mobile station detection signal in 402 fields (column), and a result who has energized the mobile station detection signal is shown in 404 fields.Fig. 4 is an abstract of relevant possibility, comprising array because some cause and the changing mode of mutual exclusion.Above-mentioned each sub-cell A, B, C, system is shown in field 406,408,410 respectively with the modulation state of D, in 412.Fig. 4 and not shown all combinations of states of totally 17 kinds but illustrate several most correlated combination, comprise those traditional mobile stations and utilize the combination that traditional approach may identification information state.
In Fig. 4, row 414 and 416 illustrate the employed pattern of traditional mobile station.So shown in the row 414, if all four sub-cells all carry out modulation with "+" phase place (zero degree (zero degrees) phase deviation) of double phase shift method, then traditional mobile station will pick out the state of " unlatching ".After traditional mobile station detects " unlatching " state, it is considered as one calls out index, then take appropriate action to obtain the details of this calling.One mobile station of having energized then can be considered as this kind combination one first possible information state " a ".Therefore planting signal may be sent by a traditional base station, for simplicity, having energized mobile station will be consistent with traditional mobile station to the coping style of this information state " a ", also be about to this state and will be considered as a calling index, and take appropriate action to obtain the details of this calling.On be set forth in the double phase shift method pattern shown in the row 414 and be same as the call forwarding message without modulating signal that a traditional base station transmits basically.In the modulation shown in the row 416 0,0,0, with 0 energized and traditional receiving platform is considered as " closing ".
In Fig. 4, four sub-cell A to D of all shown in the row 418 all carry out modulation with "-" phase place of double phase shift method, and it is a kind of mode of the short calling channel signals capacity that increases.Please refer to shown in Figure 5ly, the state that is allowed to accept may only limit to all four sub-cell A to D all when carrying out modulation with a kind of phase place, as "+" of row 414, " 0 " of row 416, with "-" of row 418.Limit above-mentioned changing mode that is allowed to and information state and as shown in Figure 5 can be effectively tradition be passed and connect the signal agreement that platform is suitable for, from two kinds " unlatching " become with " closing " state exchange the biography of energizing connect platform with three kinds of states (tri-state) of double phase shift method modulation generation+/ 0/-.The agreement of " unlatching " and " closing " signal is expanded to the ternary signal agreement only allows energize and pass that to connect platform be cost with the very little signal detection probability of loss, exchange a kind of newly-increased signal condition for.Above-mentioned amplification of signal mode is to be compatible to the traditional mobile station of the people having the same aspiration and interest (coherent), thinks because of traditional mobile station that invalid signal mode will be left in the basket and disregards.Yet in the traditional mobile station of the non-people having the same aspiration and interest (non-coherent), above-mentionedly be considered to invalid signal mode and may be considered to signal on the contrary and exist, that is " unlatching ".In the mobile station of energizing, the changing mode of above-mentioned row 418 will be regarded as an information state [b ", it also can be used as a kind of of broadcast index.In view of the above, one energized mobile station respond the mode of row 414 and 416 changing modes will be consistent with a traditional mobile station, and these mobile station response row 418 changing modes of having energized are considered as the unacquainted newly-increased information state of a kind of traditional mobile station with it.
Yet real work of some new feature need add more kinds of signal information sometimes.As the signal volume of the class of short calling message, can a kind ofly be compatible to simultaneously tradition pass connect platform and from tradition pass connect platform think zero or other harmless information states in create the information state that makes new advances mode increase.The changing mode of looking row 418 when traditional mobile station is invalid and when being ignored, because the cause of the phase resolution deficiency of some mobile station, must consider that promptly the risk that above-mentioned signal may be mistaken as the information state of one " unlatching " will exist.The traditional mobile station of the non-people having the same aspiration and interest (non-coherent) system most possibly thinks above-mentioned signal with "-" phase modulation by mistake the signal of one representative " unlatching ".
Before the content of judging the short calling message, because the phase place of half in the signal sub-cell is opposite, as row 420,422,424, with the changing mode shown in 426 will in traditional mobile station to this message the first time unit be regarded as one " closing " state after for the second time the unit averages.In view of the above, the changing mode of above-mentioned cited opposite phase is to lead because of have no way of differentiating the difference place of above-mentioned four kinds of changing modes and another kind of (0,0,0,0) changing mode in the classical signal processing mode.The tradition mobile station had both been had no way of differentiating and had also been had no way of detecting above-mentioned changing mode, then will regard it as a harmless information state (as " closing " state).In other words, do not do any reaction in (0,0,0,0) of short calling message centering changing mode military order tradition mobile station.In view of the above, above-mentioned changing mode has a special advantage compatible with traditional mobile station.For the receiver of having energized, the information state of above-mentioned changing mode representative system has been shown in the row 404, is respectively c, d, c ', with d '.In some preferred embodiment, c and d mutual exclusion be in c ' and d ', and present disclosure will describe in detail in the explanation of Fig. 7 and Fig. 8 after a while and explain this argument.
Tradition all can above-mentionedly be positioned at short calling message that adjacent short calling channel framework transmits to (as 416 and 418) and increase signal detection probability by merging with the receiving platform of having energized.During two short calling messages that special system one in front and one in back transmits, can clearly receive this in being received in the channel that a signal decays gradually, but can't knowing another message of reception first of message.Moreover, divide the tradition than defined in the earlier version of multiple access standard to reach an agreement on according to sign indicating number, require the short calling message (as message 118) in second framework should be same as the relevant short calling message (as message 116) that is positioned at first framework fully.Please refer to Fig. 6 and shown in Figure 7, it depicts the two seeds set of possible changing mode, and this two subclass is compatible to the requirement of traditional standard, that is first and second message is all identical.For the mobile station of energizing, Fig. 7 illustrates one group of changing mode with five kinds of different information states.Compared to one group of changing mode with three-state, the mobile station of energizing that can discern changing mode shown in Figure 7 can not only merely merge above-mentioned message sub-cell A, B, C, with D before decoding information state.Therefore, must abandon the information state that some effectively detecting appearance nargin can be used to exchange greater amount for.
The difference of Fig. 6 and Fig. 7 is the changing mode of row 418.If it is that the risk of " unlatchings " information state or signal is too high that traditional mobile station invalid information state that these row 418 changing modes are produced is thought by mistake, then should in the changing mode set that is applicable to the mobile station of energizing shown in Fig. 7, this column modulation pattern be removed to avoid the generation of this kind misunderstanding.Be that non-people having the same aspiration and interest receiver is read as row 418 changing modes one " unlatching " information state probably especially, but not ignore.If do not use the changing mode of these row 418, but the changing mode that utilizes all the other sub-cells amplified signal scope still.Newly-increased two kinds of changing modes (row 420 and 422) will be cost with every bit energy value that detracts (energy per bit), that is detract and energized the signal detection probability of mobile station to exchange the possible information state that quantity doubles for.Before decoding, because of the signal of two sub-cells (symbol) of each call forwarding message can disappear mutually after merging so, it is " closing " information state that traditional mobile station will be looked above-mentioned new changing mode.In the form shown in Fig. 4 to Fig. 8, with the quotation marks frame live " closing " represent this changing mode in technical for invalid, but owing to the applied processing mode of traditional receiver is regarded as " closing " information state.After removing above-mentioned row 418 changing modes, the situation of the newly-increased information state of traditional mobile station erroneous judgement should significantly reduce.Though with regard to short calling channel and other channels were compared, the infringement that the erroneous judgement of message is caused than the error detect signal of other channels was for light, removing this, one may to cause the information state of equivocal situation will be more feasible.
Shown in Figure 8 is to be not compatible with the demand that conventional code is divided the short calling channel of multiple access standard.In view of the above, first message (as message 116) that adopts changing mode system shown in Figure 8 can't merge a short calling message certainly obtains interests with second message (as message 118).Moreover, showing the time difference advantage that time (for example 40 microseconds) appearance is provided if desire to keep above-mentioned two messages to separate one, the combination of changing mode shown in Fig. 8 should with the combination mutual exclusion shown in Fig. 7, that is system only can use the combination shown in Fig. 7 or Fig. 8, and can not simultaneously and use.
In sum, the combination of the changing mode shown in Fig. 8 is not the preferred manner of amplification short calling channel signals.Yet when using its kind signal with in other kind channel, the condition of utilization changing mode may differ widely.Both deposited custom (convention) according to some, another kind of channel and the signal together transferring receiver and received comprise the first message M1 and the second message M2, and each message has first and second part, and these four parts are represented with D respectively with A, B, C.The event of its people having the same aspiration and interest of edge, above-mentioned receiver may be set to and directly merge M1 and M2 before decoding, and avoid merging the sub-cell that is arranged in this two message, that is avoid merging sub-cell A and B, and sub-cell C and D; In view of the above, above-mentioned receiver is distinguishable following two kinds of combinations "+-" and "+".Under above-mentioned condition, cover is used for the modulation value of above-mentioned part A and the double phase shift method of B should be opposite with the modulation value of above-mentioned portion C and D, feasible " AB "=" DC ", but not " AB "=" CD ".When this way can make above-mentioned imaginary receiver merge M1 and M2, its signal effectively mutually can disappear.In view of the above, in an above-mentioned traditional receiver, the state of row 424 and 426 new changing mode gained will be tantamount to " closing " information state.With regard to this changing mode, no matter tradition passes connects platform or elder generation's first and second sub-cell of merging or merges first and second message earlier, perhaps merges above-mentioned sub-cell and message simultaneously, all can detect " closing " information state.
Combination shown in Fig. 8 is removed can draw a modulation combination with four information states behind the row 418.As the similar reason of showing explanation in earlier figures 6, it will be comparatively suitable removing this kind changing mode under some situation restriction.
Other about one of points for attention of amplified signal are: for traditional mobile station, short calling message (0,0,0,0) is to be considered as a harmless information state; Yet when the method was applied to other signals, traditional receiving platform possibly can't be detected the message of simple no amplitude modulation (amplitude).Under above-mentioned situation, with regard to the tradition biography connects platform, this type of new changing mode will be tantamount to not have signal.The message of one no amplitude modulation will can not be equal to one " closing " index forever.For example,, really exist, can't derive any useful information in view of the above otherwise also can't detect above-mentioned signal reliably unless there are enough messages can definitely learn the desired location of signal in advance.Yet, in the expection clock pulse that in most cases can learn above-mentioned signal, will help the to decode merging of front signal of this information.
In sum, be sent to the signal capabilities of each short calling message of a certain specific receiver, can under the prerequisite of a little signal detection ability of sacrifice, be expanded to three kinds of states from two states.If sacrifice several decibels signal detection ability, then signal volume can be expanded to four or five states.Further amplification also belongs to possibility again.The amplification mode that is expanded to four kinds of states from two states reduces the possibility of incompatible traditional standard.Particularly may be by a calling index or short calling message are carried out modulation to transmit a broadcast index to the specific action platform.The one real work with four kinds of information states can provide signal for calling out index, broadcast index, utilizes with (call out index and add the broadcast index).
For the mobile station of energizing, the institute in the above-mentioned explanation might real make (three kinds, four kinds, or five kinds of information states) more traditional at least transfer station a kind of state is provided more.New information state can be used as a broadcast index that is assigned to a certain specific action platform.Compare with other motions that utilize the short calling channel to transmit the broadcast index, the stand-by time of the mobile station of having energized will prolong because of the certainty of above-mentioned signal.Place the practice of or a few broadcast index in the short calling channel,, receive and can reduce to minimum the mobile station number that uncorrelated message is decoded based on the certainty of above-mentioned signal.Moreover neither must the waking up in each short calling channel framework of any mobile station surpasses once to check the state of present message.Except three kinds of states all the other are real to be done, and all can support and call out index, broadcast index, with the signal condition that makes up calling index and broadcast index simultaneously.Certainly some still has more signal capabilities in fact.In view of the above, this type of significantly " interruption " that can make indivedual mobile stations touch more kinds of forms of the real work of amplified signal ability call out.
Comparing with transmit sharing signal, distinctive signal can be sent to indivedual or a few mobile station has suitable advantage.Yet if must notify all mobile stations simultaneously, in the time of for example must carrying out full broadcasting, the selectivity of above-mentioned signal will be consumed a fraction of frequency range utilization rate.Yet in real system, above-mentioned consume is very limited, and because of the broadcast index transmits once per approximately ten seconds, this type of transmission send the resource that is consumed still only to account for fraction.
Conclusion
Aforesaid explanation tells about that various examples are real to be done, and a kind of in the new characteristic of the method for amplified signal information state between called station of energizing, and the method is still possessed the compatibility of conventional table.The present invention has advised several real modes of doing, but can't be exhaustive all be applicable to real work the of the present invention, so the scope of application of the present invention is only answered the claim of application reference, but not is defined in the feature of above stated specification, unless this feature is limited in the claim of application.
Above stated specification points out that new feature of the present invention will be applicable to different embodiment, and the known technology personnel can understand and carry out ignoring, replacing on the various forms and on the System and method for, with change, and the neither disengaging scope of application of the present invention.Now lift an example, above-mentioned communication system needn't be that the sign indicating number among the embodiment divides multiple access system as described above.Though above stated specification has limited the functional of mobile station and base station, this functional canonical system that is only applicable to.
Apparently, according to the description among the top embodiment, the present invention has many corrections and difference.Therefore need be understood in the scope of its claim, except foregoing detailed description, the present invention can also implement in other embodiment widely.Above-mentioned is preferred embodiment of the present invention only, is not in order to limit claim of the present invention; All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the claim of application.
Claims (15)
1. in one yard branch multiple access communication system, must not increase channel newly and also can keep energized multicast index and the non-multicast index (tradition) of having energized and pass and to connect the method that one of platform compatibility provides the multicast index, this provides the method for multicast index to comprise:
Slot device when (a) seeing through the time division multiplexing that distributes in advance connects the employed channel of platform to select tradition to pass, to transmit the signal signal to indivedual receiving platforms;
(b) be decided by a time division multiplexing time slot in this selected channel, to send messages to the specific action platform that desire receives a multicast index; And
(c) can't differentiate a kind of of difference with a traditional receiving platform and can not cause inconsistent mode, being carried out phase modulation by a message that transmits in this time division multiplexing time slot that determines.
2. the method that the multicast index is provided as claimed in claim 1 is characterized in that, above-mentioned steps (a) comprises selects a short calling channel.
3. the method that the multicast index is provided as claimed in claim 1 is characterized in that, above-mentioned steps (c) comprises carries out double phase shift method to this message.
4. the method that the multicast index is provided as claimed in claim 1 is characterized in that, also comprises this time division multiplexing time slot is divided into a plurality of sub-cells, and each this a plurality of sub-cells are carried out different indivedual modulations.
5. connect in the communication system of platform in more existing mounted non-(tradition) biographies of energizing, one strengthens having energized passes the method that connects the interstation signal, and this method comprises at least:
(a) select to pass a signal element that connects the interstation communication, before a symbol content of this signal element of estimation, the sub-cell merging of this signal element is handled at traditional receiving platform in tradition;
(b) set one and energized receiving platform before merging, to differentiate the information content of sub-cell earlier;
(c) energized in one and receive one first example of selecteed this signal element in the receiving platform, the sub-cell of this first example is modulation all in the same manner, and one second example that receives selecteed this signal element, and the sub-cell of this second example is modulation all by different way; And
(d) this first example of detecting this signal element in this receiving platform of having energized is with as one first information state, and this second example of detecting this signal element is with as one second information state;
Wherein above-mentioned traditional receiving platform is equivalent to second example of this signal element to a Signal Processing, makes result be tantamount to first example of this signal element.
6. method as claimed in claim 5 is characterized in that, above-mentioned steps (d) also comprises the reverse phase changing mode that detecting one is applied to this sub-cell.
7. method as claimed in claim 5 is characterized in that, above-mentioned first example with this signal element of receiving is to be arranged in time and the channel of decision in advance, and its actual amplitude is zero.
8. method as claimed in claim 7 is characterized in that, above-mentioned steps (d) also is contained in the receiving platform of having energized and detects, and is applied to receive the double phase shift method changing mode of the sub-cell in the difference of two in the relevant difference framework signal element.
9. method as claimed in claim 8 is characterized in that, the selected signal element that above-mentioned traditional receiving platform is set in advance aspire to the time reference time slot of the prior decision in a plurality of relevant framework should repeat.
10. whether method as claimed in claim 9 is characterized in that, also comprise this second example of judging this signal element and repeat in an abutment frame.
11. method as claimed in claim 9 is characterized in that, whether a reverse pattern that also comprises this second example of judging this signal element repeats in an abutment frame.
12. in one yard branch multiple access communication system, one indicates the method that a mobile station can utilize broadcast, this indicates a mobile station and can utilize the method for broadcast to comprise:
(a) identification is dispensed to a time slot of a specific action platform in advance, and this time slot system is positioned at a framework of a short calling channel;
(b) preparation is positioned at a message of this time slot, and this message system carries out modulation with double phase shift method; And
(c) be transmitted in prior this message of distributing in the time slot of being somebody's turn to do of this channel.
13. sign one mobile station as claimed in claim 12 can utilize the method for broadcast, it is characterized in that, also is contained in the corresponding time slot of short calling channel framework of two adjacency, carries out this step (a), step (b), with step (c).
14. sign one mobile station as claimed in claim 13 can utilize the method for broadcast, it is characterized in that, this step (b) comprises the essence identical message of preparing to be arranged in each short calling channel framework.
15. sign one mobile station as claimed in claim 14 can utilize the method for broadcast, it is characterized in that, also comprises with different double phase shift method values the sub-cell of this message is carried out modulation.
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| CN109783303A (en) * | 2017-11-14 | 2019-05-21 | 中国移动通信集团黑龙江有限公司 | A kind of compatibility determination method, device and computer readable storage medium |
| CN109783303B (en) * | 2017-11-14 | 2022-05-03 | 中国移动通信集团黑龙江有限公司 | Compatibility determination method, device and computer readable storage medium |
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