CN101461204B - Use of overhead in a wireless communication system - Google Patents

Use of overhead in a wireless communication system Download PDF

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Publication number
CN101461204B
CN101461204B CN2007800134038A CN200780013403A CN101461204B CN 101461204 B CN101461204 B CN 101461204B CN 2007800134038 A CN2007800134038 A CN 2007800134038A CN 200780013403 A CN200780013403 A CN 200780013403A CN 101461204 B CN101461204 B CN 101461204B
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time
cycle
frequently
information
message
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CN101461204A (en
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李君易
P·A·安尼格斯廷
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Qualcomm Inc
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Qualcomm Inc
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Priority claimed from US11/486,653 external-priority patent/US8351405B2/en
Priority claimed from US11/486,602 external-priority patent/US7929619B2/en
Priority claimed from US11/611,831 external-priority patent/US8451914B2/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority claimed from PCT/US2007/066676 external-priority patent/WO2007121387A2/en
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Abstract

Methods and apparatus for allocating repeating time periods in a wireless communication system. A timing reference, such as a beacon is identified. An overhead set of repeating time periods is identified, the overhead set of repeating time periods having an overhead signal periodicity related to the beacon. A data payload set of repeating time periods having a data payload periodicity related to the beacon time period is identified. The overhead set of repeating time periods is divided into a fixed bit-use subset of repeating time periods and a flexible bit use subset of repeating time periods.

Description

The use of expense in wireless communication system
Related application
The application is the part continuation application; Its require on April 14th, 2006 submit to pass through to quote the U.S. Provisional Patent Application S.N.60/792 that clearly includes in this; 291, the U.S. Patent application S.N.11/486 that submits on July 14th, 2006; 602, the temporary patent application S.N.60/792 that submits on April 14th, 2006,366 and the patent application S.N.11/486 that submits on July 14th, 2006,563 priority.
Technical field
The present invention relates to communication system, relate in particular to and be used for distributing the method and apparatus that to transfer at the frequency that wireless communication system uses.
Background
In cellular wireless system, the coverage is divided into a plurality of covering regions that are commonly referred to as cellular cell.Each cellular cell can further be subdivided into a plurality of sectors.Wireless terminal in the cellular cell and the base station communication of serving this cellular cell.Wireless terminal can comprise the mobile device of broad range, for example comprises cell phone and such as other mobile transmitters such as personal digital assistant that radio modem is arranged.
The problem of known cellular communication system is that the transmission of the base station in the sector of cellular cell possibly conflict with the transmission of adjoining the base station in the sector or in the adjacent cells of same cellular cell mutually.For example, OFDM (OFDM) system adopts given bandwidth and it is divided into a plurality of even isolated frequency accent that can be used to transmit data.The transmission of the base station in crossover sector and/or cellular cell uses same frequency to transfer or same group of frequency timing, because the operation of adjoining the base station in sector and/or the adjacent cells possibly can be disturbed in a period of time.This problem is especially remarkable under the periodically or almost periodic situation in transmission.
Under periodicity or almost periodic situation, the mutual interference that is caused by the base station of adjoining in sector and/or the cellular cell possibly be a height correlation.For example; When the frequency that the base station A corresponding to first sector uses is transferred and the frequency phase modulation while of using corresponding to another base station B that adjoins the sector; Be to use in the situation that same function distributes and periodically reproduction at the frequency accent; In the next one transmission cycle, the frequency that base station A uses transfer will be once more with base station B use identical.The relevant interference of this type can cause the signal phase mutual interference repeatedly in long-time section by the transmission of identical two base stations.If in the crossover zone of wireless terminal location between two base stations, then the receiver of this wireless terminal possibly can not correctly detect signal from down link signal in long-time section.
In order to reduce the risk of the interference of being correlated with or prolonging, will be useful if the enough meetings of ability are transferred the base station assigns of mode in adjacent sectors and cellular cell of the risk minimization of relevant interference frequently.
In view of above discussion, obviously need make the minimizing possibility that adjoins the conflict between the transmission that takes place in cellular cell and the adjacent cells at wireless communication system.Hope control and/or make to minimize, expand cycle avoiding any particular device blocking communication signal from the probability of the transmission of adjoining any given base station in sector or the adjacent cells with repeated collisions.
General introduction
Method and apparatus described herein is used in various communication systems, transfers in many sectors, the many cellular cells communication system in multifrequency such as picture and distributes and use frequently that subset is used to communicate by letter.This system can be OFDM (OFDM) system for example.Ofdm communication system comprises that a group of being used to transmit data and control signal transfers frequently.Banded symbol data piece is used for the transmission information at transmitter and receiver two places.Sign beacon time reference.Sign has the overhead signal periodic expense repetition time periodic groups relevant with the beacon time reference.Sign has the periodic data payload repetition time periodic groups of the data payload relevant with the beacon time reference.Expense repetition time periodic groups is divided into fixed bit uses cycle repetition time son group and flexible bit to use cycle repetition time son group.Use cycle repetition time son group and flexible bit to use cycle repetition time son group to send data to processor or transmitter based on fixed bit.
The fixed bit that in addition, can generate the first kind is used message.The fixed bit that also can generate second type is used message.Can be the period 1 of the re-transmitted of the transmission of processor or the fixed bit use message that communication identifier is used for the first kind.Can be the second round that transmission identifies the re-transmitted of the fixed bit use message that is used for second type.The fixed bit of the first kind uses message to comprise one of software version, system time, access priority, information on load, carrier wave configuration, sector configuration and through-put power.Use the flexible bit of cycle repetition time son group to use message to comprise other carrier load message about flexible bit.Being used for flexible bit uses the flexible bit of cycle repetition time son group to use message to comprise other sector load message.
The function of various embodiment can use the combination of hardware, software or hardware and software to realize.In addition, the function of various embodiment also can be stored on the machine readable media.Frequently transfer and distribute chart can calculate once and be stored in base station and/or the mobile node, make the calculating again that on continuous foundation, need not carry out assignment information.In this type of embodiment, still be in harmonious proportion the distribution of frequently transferring sequence frequently, during assigning process even these functions are not executed in real time according to these function executing.
Though various embodiment have been discussed in above general introduction, should understand not all embodiment and all must comprise identical characteristic, and in each characteristic of above description some are dispensable, but be desirable in certain embodiments.Numerous other characteristic, benefit and details of the whole bag of tricks of various embodiment and device specify middle discussion ensuing.
The accompanying drawing summary
Fig. 1 illustrates the network diagram of the example communication system that realizes according to various embodiment.
Fig. 2 illustrates the exemplary base that realizes according to various embodiment.
Fig. 3 illustrates the example wireless terminal that realizes according to various embodiment.
Fig. 4 is illustrated in the exemplary frequency that uses in the ofdm system and assembles.
Fig. 5 has illustrated according to the demonstration of various embodiment the exemplary signal frame structure of strip and non-strip.
Fig. 6 illustrates the exemplary one group of subset frequently that will be used by base station transmitter according to various embodiment.
Fig. 7 illustrates two the exemplary frequency subset allocation sequence will being used by two transmitters respectively according to various embodiment.
Fig. 8 illustrate according to the brachymemma of various embodiment frequently subset allocation sequence to be fit to the operation of frame synchronization structure.
Fig. 9 is the figure according to the exemplary frequency subset allocation module of various embodiment realizations.
The Figure 10 that comprises the combination of Figure 10 A, 10B, 10C, 10D, 10E, 10F and 10G is the compound table of the exemplary frequency subset in the exemplary embodiment, and these frequency subset are allocated in banded symbol section to be used.
Figure 11 be according to various embodiment the exemplary reproduction about the use of the downlink tone block that is associated with the base station attachment point is shown the time based structures figure.
Figure 12 uses according to communication equipments such as the operational example of various embodiment such as base stations frequently to transfer piece to transmit the flow chart of the illustrative methods of information.
Figure 13 is the figure according to the exemplary base of various embodiment realizations.
The Figure 14 that comprises the combination of Figure 14 A and Figure 14 B is the flow chart according to the illustrative methods at the operate wireless terminal of various embodiment.
Figure 15 is the figure according to the example wireless terminal of various embodiment realizations.
Figure 16 is used for the block diagram that communication equipments such as operational example such as base station use the exemplary communication device of the module of transferring piece to transmit information frequently according to having of various embodiment.
The Figure 17 that comprises the combination of Figure 17 A and Figure 17 B is the block diagram of example wireless terminal that is used for the module at operate wireless terminal according to having of various embodiment.
Figure 18 is the figure that the overhead signal data are shown.
Figure 19 illustrates the flow chart that uses banded symbol data to transmit the method for information.
Describe in detail
The communication system of available wide region is used to describe and is used to distribute the method and system of subset frequently.For example, available support such as the notebook computer that is equipped with modulator-demodulator, PDA and support the system of the support mobile communication equipments such as various other equipment of wave point to use various characteristics for equipment mobility.
Fig. 1 illustrates the example communication system 100 that realizes according to various embodiment, and it comprises a plurality of cellular cells: cellular cell 1102, cellular cell M104.Notice that indicated like cellular cell borderline region 168, adjacent cells 102,104 is crossover slightly, produce the possibility that the signal between the signal that is transmitted by the base station in the adjacent cells disturbs by this.Each cellular cell 102,104 of example system 100 comprises 3 sectors.According to various embodiment, be not subdivided into a plurality of sectors cellular cell (N=1), the cellular cell (N=2) of two sectors to be arranged and the cellular cell (N>3) of 3 above sectors is arranged all be possible.Cellular cell 102 comprises first sector---sector 1110, second sector---sector 2112 and the 3rd sector---sector 3114.Each sector 110,112,114 has two sector boundary regions; Each borderline region adjoins between the sector at two to be shared.The possibility that all has signal to disturb between the signal that transmit the base station of sector boundary regions in adjacent sectors.Sector boundary regions between line 116 expression sectors 1110 and the sector 2112; Sector boundary regions between line 118 expression sectors 2112 and the sector 3114; Sector boundary regions between line 120 expression sectors 3114 and the sector 1110.Similarly, sub-district M104 comprises first sector---sector 1122, second sector---sector 2124 and the 3rd sector---sector 3126.Sector boundary regions between line 128 expression sectors 1122 and the sector 2124; Sector boundary regions between line 130 expression sectors 2124 and the sector 3126; Sector boundary regions between line 132 expression sectors 3126 and the sector 1122.Cellular cell 1102 comprises base station (BS)---base station 1106, and a plurality of end nodes (EN) in each sector 110,112,114.Sector 1110 comprises EN (1) 136 and the EN (X) 138 that is coupled to BS106 respectively via Radio Link 140,142; Sector 2112 comprises respectively EN (1 ') 144 and the EN (X ') 146 that is coupled to BS106 via Radio Link 148,150; Sector 3114 comprises respectively EN (1 ") 152 and the EN (X ") 154 that is coupled to BS106 via Radio Link 156,158.Similarly, cellular cell M104 comprises base station M108 and a plurality of end nodes (EN) in each sector 122,124,126.Sector 1122 comprises EN (1) 136 ' and the EN (X) 138 ' that is coupled to BS M108 respectively via Radio Link 140 ', 142 '; Sector 2124 comprises respectively EN (1 ') 144 ' and the EN (X ') 146 ' that is coupled to BS M108 via Radio Link 148 ', 150 '; Sector 3126 comprises respectively EN (1 ") 152 ' and the EN (X ") 154 ' that is coupled to BS M108 via Radio Link 156 ', 158 '.System 100 also comprises the network node 160 that is coupled to BS1106 and BS M108 respectively via network link 162,164.Network node 160 also is coupled to other network node via network link 166, for example other base station, aaa server node, intermediate node, router etc. and internet.Network link 162,164,166 can be a Connectorized fiber optic cabling for example.For example to wait each end node can be the wireless terminal that comprises transmitter and receiver to EN (1) 136.For example EN (1) 136 wireless terminal such as grade is removable also can communicate via the base station in the cellular cell at Radio Link and this current place of EN through system 100.For example EN (1) 136 wireless terminal such as grade (WT) can communicate with for example system 100 inside or system's 100 outside peer node such as other WT via base station and/or the network node 160 of for example BS106.For example EN (1) 136 WT such as grade can be such as cell phone, the mobile communication equipments such as personal digital assistant of radio modem are arranged.Each base station is that strip uses a kind of method to carry out subset allocation frequently, and this method is different from and is used for distributing the method for confirming frequently to transfer saltus step that is in harmonious proportion frequently at all the other code-element periods such as for example non-strip.Wireless terminal uses frequency subset allocation method to come together to confirm that together with the information that receives from the base station (for example, slope, base station ID, sector ID information) it is used in the frequency that receives data and information in the specific strip and transfers.According to various embodiment, make up the frequency subset allocation sequence and transfer the interference that makes between the sector and between cellular cell to disperse frequently to cross over each.
Fig. 2 illustrates the exemplary base 200 according to various embodiment.Exemplary base 200 realizes subset allocation sequence frequently, wherein is that each different sectors type of sub-district generate different frequency subset allocation sequence.Base station 200 can be used as any in the base station 106,108 of system 100 of Fig. 1.Base station 200 comprises processor 206, input/output interface 208 and the memory 210 of the receiver 202 that is coupled by bus 209, transmitter 204, for example CPU etc., various unit 202,204,206,208 and 210 can be on bus 209 swap data and information.
The branch fan antenna 203 that is coupled to receiver 202 is used to receive data that the wireless terminal from each sector in the cellular cell of this base station transmits and other signal such as channel reporting for example.The wireless terminal 300 (referring to Fig. 3) that the branch fan antenna 205 that is coupled to transmitter 204 is used in each sector of the cellular cell of this base station sends data and other signal, for example control signal, pilot signal, beacon signal etc.In various embodiments, a plurality of receivers 202 and a plurality of transmitters 204 can be adopted in base station 200, and for example each sector has individual reception machine 202 and each sector that individual transmitter 204 is arranged.Processor 206 can be a for example general CPU (CPU).Control the operation of base station 200 under the guiding of one or more routines 218 of processor 206 in being stored in memory 210 and realize these methods.I/O interface 208 is provided to the connection of other network node, and BS200 is coupled to other base station, couple in router, aaa server node etc., other network and internet.Memory 210 comprises routine 218 and data/information 220.
Data/information 220 comprises data 236, comprises the frequency subset allocation sequence 238 of downlink strip symbol time information 240 and downlink tone adjusting information 242; And wireless terminal (WT) data/information 244, it comprises many group WT information: WT1 information 246 and WT N information 260.For example every group of WT information such as WT1 information 246 comprises data 248, Termination ID 250, sector ID 252, uplink traffic channel information 254, downlink channel information 256 and pattern information 258.
Routine 218 comprises Communications routines 222 and base stations control routine 224.Base stations control routine 224 comprises Scheduler module 226 and signaling routine 228, and other downlink tone that signaling routine 228 comprises the frequency subset allocation routine 230 that is used for strip, be used for all the other code-element periods such as non-strip is for example distributed jump routine 232 and beacon routine 234.
Data 236 comprise the encoder that is sent to transmitter 204 214 are used for being transferred to the data to be sent that WT encodes before, and the data of after reception, having been handled by the decoder 212 of receiver 202 of receiving from WT.Downlink strip symbol time information 240 comprises the frame synchronization structure information such as overtime crack, beacon slot and especially big structure of time slot information; And specify whether given code-element period is whether strip (if also comprise the index of this strip) and this band shape code element are the information of the replacement point of the employed frequency subset allocation sequence in brachymemma base station.Downlink tone adjusting information 242 comprises following information: assign to give base station 200 carrier frequency, the number and the frequency of transferring frequently, to distribute to one group of strip subset and such as other cellular cell and sector occurrences such as slope, slope index and sectors type frequently.
Data 248 can comprise the data that WT1300 received from peer node, data and the downlink channel quality report feedback information that the WT1300 expectation sends to peer node.Termination ID 250 is ID of the sign WT1300 of base station 200 appointments.Sector ID 252 comprises the information of the sector that sign WT1300 operates just therein.Sector ID 252 can be used for for example confirming sectors type.Uplink traffic channel information 254 comprises that sign distributed to the information of the channel segment that WT1300 uses by scheduler 226; For example, be used for the uplink traffic channel segment of data, the dedicated uplink control channel that is used to ask, power control, the time base control etc.Assign and comprise one or above logic tones for each uplink channel of WT1300, each logic tones is followed the up link hopping sequences.Downlink channel information 256 comprises that sign assigns the information of channel segment that is used to carry data and/or information of giving WT1300 by scheduler 226, for example, is used for the downlink traffic channel segment of user data.Each downlink channel of distributing to WT1300 comprises one or above logic tones, its each all follow the down link hopping sequences.The information that pattern information 258 comprises the mode of operation that identifies WT1300---for example sleep, keep, move---.
Communications routines 222 control base stations 200 are carried out various traffic operations and are realized various communication protocols.
Base stations control routine 224 is used to control base station 200 and carries out basic base station functional tasks; For example signal generates and receives, scheduling; And each step that realizes the method for some embodiment, be included in and use during the strip frequently subset allocation sequence to send signal to wireless terminal.
The operation that signaling routine 228 control has the receiver 202 of self decoder 212 and has the transmitter 204 of self encoder 214.Signaling routine 228 is responsible for the generation that data 236 and control information are sent in control.Frequently subset allocation routine 230 uses the method for this embodiment and use to comprise that the data/information 220 of downlink strip symbol time information 240 and sector ID 252 makes up the frequency subset that will in strip, use.The downlink tone subset allocation sequence is for every kind in cellular cell sectors type difference, and also different for adjoining cellular cell.WT300 receives signal according to the downlink tone subset allocation sequence in strip; Base station 200 uses identical downlink tone subset allocation sequence to generate the transmission signal.Other downlink tone distributes jump routine 232 to use the information that comprises downlink tone adjusting information 242 and downlink channel information 256, for the code-element period outside the strip makes up the downlink tone hopping sequences.Down link data transfers each sector of a cellular cell of hopping sequences leap synchronous frequently.Beacon routine 234 control for example concentrates on one or a few and transfers the transmission of the beacon signals such as signal of relative high power signals frequently; Beacon signal can be used for synchronous purpose; The frame time base structure of simultaneous downlink signal for example, and therefore with respect to especially big boundary of time slot synchronizing band subset allocation sequence.
Fig. 3 illustrates in for example EN (1) 136 wireless terminal such as grade (end node) that can be used as system shown in Fig. 1 100 example wireless terminal (end node) 300 of any.Wireless terminal 300 is realized subset allocation sequence frequently.Wireless terminal 300 comprises by bus 310 and is coupled to the receiver that comprises decoder 312 302 together, the transmitter 304 that comprises encoder 314, processor 306 and memory 308, each unit 302,304,306,308 can be on bus 310 swap data and information.The antenna 303 that is used to receive from the signal of base station 200 is coupled to receiver 302.Be used for being coupled to transmitter 304 to the antenna 305 that signal is sent in for example base station 200.
For example processor 306 such as CPU is through executive routine 320 and use the data/information 322 in the memory 308 to control the operation of wireless terminal 300 and realize the whole bag of tricks.
Data/information 322 comprises user data 334, user profile 336 and frequency subset allocation sequence 350.User data 334 can comprise and be used for being sent to the data of encoding before in base station 200 that are intended to go to peer node by transmitter 304 with being routed to encoder 314, and the data of having been handled by the decoder the receiver 302 312 that receive from base station 200.User profile 336 comprises uplink traffic channel information 338, downlink channel information 340, Termination ID information 342, base station IDs information 344, sector ID information 346 and pattern information 348.Uplink traffic channel information 338 comprises that sign is by the information of base station 200 appointments to wireless terminal 300 uplink channel segments of use to base station 200 transmissions the time.Uplink channel can comprise uplink traffic, for example ask dedicated uplink control channel, power control channels such as channel with timely basic control channel.Each uplink channel comprises one or more logic tones, and each logic tones is followed the uplink tone hopping sequences.The up link hopping sequences is between each sectors type of a cellular cell and to adjoin between the cellular cell be different.Downlink channel information 340 comprises that sign assigns the information of giving the downlink channel segment that WT300 uses when BS200 forward WT300 sends data/information by base station 200.Downlink channel can comprise downlink traffic channels and assigned channels, and each downlink channel comprises one or more logic tones, and each logic tones is followed downlink tone hopping sequences synchronous between each sector of this cellular cell.
User profile 336 also comprises the base station IDs information 344 of the concrete base station 200 of having communicated by letter with its foundation as the Termination ID information 342 of base station 200 assigned identification, sign WT and the sector ID information 346 that identifies the present residing particular sector of WT300 in the cellular cell.Base station IDs 344 provides cell slope value and sector ID information 346 provides sector index type; This cell slope value and sector index type can be used for derivation and transfer hopping sequences frequently.The pattern information 348 sign WT300 that are also included within the user profile 336 are in sleep pattern, maintenance pattern or operational mode.
Frequently subset allocation sequence 350 comprises downlink strip symbol time information 352 and downlink tone adjusting information 354.Downlink strip symbol time information 352 comprises such as frame synchronization structure information such as overtime crack, beacon slot and especially big structure of time slot information; With specify whether given code-element period is whether strip (if then also comprise the index of strip) and this band shape code element are the information of the replacement point of the employed frequency subset allocation sequence in brachymemma base station.Downlink tone adjusting information 354 comprises following information: assign to give base station 200 carrier frequency, the number and the frequency of transferring frequently, to be assigned to one group of strip subset and such as other cellular cell and sector occurrences such as slope, slope index and sectors type frequently.
Routine 320 comprises Communications routines 324 and wireless terminal control routine 326.The various communication protocols that Communications routines 324 control WT300 use.Basic wireless terminal 300 functions of wireless terminal control routine 326 controls comprise the control of receiver 302 and transmitter 304.Wireless terminal control routine 326 comprises signaling routine 328.Signaling routine 328 comprises that the frequency subset allocation routine 330 that is used for strip and other downlink tone that are used for other code-element periods such as non-strip for example distribute jump routines 332.Frequently subset allocation routine 330 uses user data/information 322 such as base station IDs information 344 such as comprising downlink channel information 340, for example slope index and sectors type and downlink tone adjusting information 354 to generate the downlink tone subset allocation sequence according to some embodiment, and handle from the base station 200 send receive data.Information and downlink channel information 340 that other downlink tone is distributed jump routine 330 to use and comprised downlink tone tonal signal 354 make up the downlink tone hopping sequences as the code-element period outside the strip.Frequently subset allocation routine 330 is used for when being carried out by processor 306 confirming that wireless terminal 300 will receive when and on which is transferred frequently the one or more banded symbol signal from base station 200.Uplink tone distribute jump routine 330 use subset allocation functions frequently together with from the base station 200 information that receive confirm that its frequency that should send transfers above that.
Fig. 4 illustrates the OFDM spread spectrum air interface technologies that realize each sector for each cellular cell of Fig. 1 (102,104) of various embodiment.In Fig. 4, transverse axis 451 expression frequencies.The total amount that for example is used for the available bandwidth of special carrier frequency 453 such as downlink signaling is divided into the individual isolated frequency in ground that is equal to of a certain number (K) and transfers.In certain embodiments, there are 113 to be equal to the isolated frequency accent in ground.These transfer index frequently is 0 to K-1.Transfer at exemplary frequency shown in Fig. 4: transfer 0455 frequently, transfer 1457 frequently, transfer 2459 and transfer K-1461 frequently frequently.Use this bandwidth simultaneously in the sector that comprises two cellular cells 102,104 110,112,114,122,124,126 each.In each sector of each cellular cell, in each sector of each cellular cell, use respectively and frequently transfer 0 to send down link signal to K-1.Owing in each sector of two cellular cells 102,104, use identical bandwidth; The signal that on these are transferred frequently, is sent simultaneously by different cellular cells and sector maybe mutual interference mutually, for example in crossover overlay areas such as sector boundary regions 116,118,120,128,130,132 and cellular cell borderline region 168 for example.
The exemplary signal frame structure of Fig. 5 has illustrated the demonstration that realizes according to each sector for each cellular cell (102,104) among Fig. 1 of various embodiment strip and non-strip.In Fig. 5, transverse axis 501 express times.A code-element period is represented in a unit on the time shaft 501, for example the OFDM code-element period in the ofdm communication system.In each code-element period, K of a group shown in Fig. 4 is transferred frequently or its subclass is used for down link signal 200 is sent to wireless terminal 300 from the base station.The frequency that is used for sending down link signal is transferred and is distributed in different code-element periods and can follows different distribution methods or algorithm.In the exemplary embodiment, there are two kinds of different frequencies to transfer distribution method.Transfer in the distribution method at first kind of frequency, only the subclass of this K frequency accent is used for code element, and this subclass is to select from one group of frequency subset of fixing according to predetermined scheduling sequence.Transfer distribution method to be used to distribute the code element of transferring frequently to be called banded code element first kind of frequency, for example 502 shown in Fig. 5,506 and 510.Transfer in the distribution method at second kind of frequency, use and frequently transfer hopping sequences to confirm to transfer frequently, and transfer frequently to distribute and transfer frequently to accomplish through assignment logic corresponding to the physics of logic tones.Transfer distribution method to be used to distribute the code element of transferring frequently to be called non-banded code element second kind of frequency, for example 504 shown in Fig. 5,508 and 512.Generally speaking, it not is to be according to predetermined scheduling sequence from fixing one group of subset frequently that this group of in non-strip, using is frequently transferred.Note in various embodiments, other code-element periods except that banded code element and non-banded code element being arranged, for example send the code-element period of beacon signal.
Fig. 6 illustrates the exemplary one group of subset frequently that will be used by base station transmitter according to various embodiment.Be simplified illustration, frequently transfer total number to equal 7.In the exemplary embodiment, frequently transferring total number is 113.The index that the longitudinal axis 601 expressions are transferred frequently.Frequently transfer index to be increased to 6 from 0.Every tabulation is shown the frequency subset of in banded code element, using.In each row, the frame table of blacking shows that corresponding frequency is stealthily substituted and is contained in the given frequency subset.For example, the frequency subset in the row 602 comprises and frequently transfers 0,3,6; Frequency subset in the row 604 comprises frequently transfers 1,4,5; Frequency subset in the row 606 comprises frequently transfers 2,3,5; Frequency subset in the row 608 comprises frequently transfers 0,2,6; Frequency subset in the row 610 comprises frequently transfers 1,4,6.In this illustrates, always total N=5 frequency subset.In this illustrated, frequently the number transferred of the frequency in subset was identical and equal 3 to be included in each.
Generally speaking, the number of each frequency subset intermediate frequency accent can be identical or different.According to various embodiment, it is at most 20% of arbitrary frequency subset intermediate frequency accent number that any two frequency subset intermediate frequencies are transferred the difference of number.According to various embodiment, be included in a frequency in the frequency subset and transfer number to approach frequently to transfer the half the of total number.For example, be included in one frequently the frequency in the subset transfer number and the half the difference of transferring total number frequently be at most frequently transfer total number half the 20%.
Fig. 7 illustrates two the exemplary frequency subset allocation sequence will being used by two base station transmitters respectively according to various embodiment.Illustrating 700 is frequency subset allocation sequence of being used by first transmitter, and illustrating 720 is frequency subset allocation sequence of being used by second transmitter.
Illustrating in 700 transverse axis 703 express times, and the code-element period of each unit representation on the time shaft 701.With file the use that banded code element intermediate frequency is transferred is shown.Though the use that these not shown other code-element period intermediate frequencies are transferred should be understood that transferring frequently is to transfer distribution and/or jump method to use according to certain frequency.Illustrate 700 and be illustrated in the banded code element, the frequency that is included in the fixing frequency subset calls in sending down link signal.Illustrating this group frequency subset of using in 700 is exactly in the subclass shown in Fig. 6, and it is made up of N=5 unique frequency subset.These frequency subset are 0 (being used for 602), 1 (being used for 604), 2 (being used for 606), 3 (being used for 608) and 4 (being used for 610) by index.These frequency subset are selected subset from this group according to predetermined scheduling frequently, and it is the frequency subset allocation sequence.Particularly, in banded code element 702, use subset 0 frequently; In banded code element 704, use subset 1 frequently; In banded code element 706, use subset 2 frequently; In banded code element 708, use subset 3 frequently; In banded code element 710, use subset 4 frequently.After banded code element 710, this subset allocation sequence repetition frequently.Therefore, in banded code element 712, use subset 0 frequently; In banded code element 714, use subset 1 frequently; In banded code element 716, use subset 2 or the like frequently.
Illustrating in 720 transverse axis 723 express times, and the code-element period of each unit 721 expression on the time shaft.With file the use that banded code element intermediate frequency is transferred is shown.Though the use that these not shown other code-element period intermediate frequencies are transferred, should understanding frequently, accent is to transfer distribution and/or jump method to use according to certain frequency.Illustrate 720 and be illustrated in the banded code element, the frequency that is included in the fixing frequency subset calls in sending down link signal.Illustrating this group frequency subset of using in 720 is exactly to illustrate the same subclass of using in 700.These frequency subset are selected subset from this group according to predetermined scheduling frequently, and it is the frequency subset allocation sequence.That uses in the frequency subset allocation sequence of using in second base station and first base station is different.Particularly, in banded code element 722, use subset 0 frequently; In banded code element 724, use subset 2 frequently; In banded code element 726, use subset 4 frequently; In banded code element 728, use subset 1 frequently; In banded code element 730, use subset 3 frequently.After banded code element 730, this subset allocation sequence repetition frequently.Therefore, in banded code element 732, use subset 0 frequently; In banded code element 734, use subset 2 frequently; In banded code element 736, use subset 4 frequently, or the like.That uses in the cycle of the frequency subset allocation sequence of using in second base station and first base station is identical.This cycle equals the number of this group intermediate frequency subset.Preferably, the number of the frequency subset in this group is a prime number, for example N=97.
Above illustrating in 700 and 720, same frequency subset is used in these two base stations in banded code element 702 and 722.When these two banded code elements were alignd, then in fact these two base stations used identical frequency to transfer to send its down link signal, and the strong correlation that has formed thus between the signal disturbs.Advantageously, according to various embodiment, because frequently subset allocation sequence is different, so these two base stations use different frequency subset in follow-up banded code element, thereby avoid continuing very strong interference.Notice that these two base stations needn't complete each other time synchronized.
Fig. 8 illustrate according to the brachymemma of various embodiment frequently subset allocation sequence to be fit to the operation of frame synchronization structure.In illustrating shown in Fig. 7, the subset allocation sequence one-period connects one-period ground and moves frequently.In certain embodiments, for down link signal in another frame synchronization structure align, frequently subset allocation sequence is by brachymemma and restart.Fig. 8 illustrates the example frame synchronization structure, comprises overtime crack, beacon slot and especially big time slot.Overtime crack comprises a fixed number code element, and for example 114 coherent OFDM code element transmission times are interval.Some downlink tone hopping sequences has the periodicity in overtime crack.Beacon slot comprises fixed number overtime crack, the for example overtime crack of 8 coherent indexes.In one embodiment, beacon signal is sent in beacon slot.Especially big time slot comprises a fixed number beacon slot, the for example beacon slot of 18 coherent indexes.
In Fig. 8, especially big time slot 800 comprises 18 beacon slots, promptly 822,824,826,828,830,832,834,836,838,840,842,844,846,848,850,852,854,856.These beacon slots are L=0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17 by index respectively.For example beacon slot 836 beacon slots such as grade comprise 8 overtime cracks, promptly 802,804,806,808,810,812,814,816.Begin to send distinct symbols in each overtime crack.For example, in overtime crack 802, preceding two code elements 860 are used to send beacon signal, and in overtime crack 804 and 806, preceding two code elements 864 and 866 are not sent.In overtime crack 808,810,812,814,816, preceding two code elements 868,870,872,874 and 876 are banded code elements, for example are used for sending broadcasting and/or control information.Overtime crack can comprise other code elements except that preceding two distinct symbols, for example is used for passing on 112 OFDM code elements of the data/information of the user data that comprises that downlink traffic channel segment comprises.The time based structures of beacon slot repeats.For example be similar to 860, two code elements 862 of preceding two code elements and be used to send beacon signal.
Banded code element in the beacon slot in the exemplary embodiment of Fig. 8 is m=0 by index, 1 ..., 9.For example, the banded code element 880 of first in the beacon slot is m=0 and second banded code element 882 in this beacon slot is m=1 by index by index.
In the exemplary embodiment, subset allocation sequence is given as follows frequently.
Make
F (bssSlopeIndex, bssSectorType, k)=(bssSlopeIndex+1)/((bssSectorType*k+k 2) index of the frequency subset that will in banded code element k, select of expression, wherein all arithmetic operators (+, 2, *, /) in field N, define, wherein N is a prime number.For example, N=97.
The index of bssSlopeIndex=cell slope value, and be identical for each sector of this cellular cell preferably; Adjoin cellular cell and should have different values for bssSlopeIndex.Parameter b ssSlopeIndex equals 0,1 ..., N 1-1, N wherein 1≤N.In one embodiment, N 1=96.
The bssSectorType=sector index.Suppose sectors type T the group 0,1 ..., 5}, 0,1} or 0,1, among the 2}; Adjoining the sector and should have different T values in the given base station.
Specific function in the f=base station section.
The index of k=strip, k=L*10+m
Express with slightly different form:
k＝L*10+m；
temp0＝bssSectorType*k+k*k；
temp1＝imod(temp0，N)；
F (bssSlopeIndex, bssSectorType, k)=mod (temp1* (bssSlopeIndex+1), N); Wherein for integer x and m, modular function mod (x, m) be defined as mod (x, m)=x-m*floor (x/m), wherein function f loor (x) is defined as the maximum integer that is less than or equal to x; For integer x and m, if (x*y m) equals 1 to mod, and then (x m) equals y to mould inverse function imod, wherein 1≤y≤m.If (x is 0 m) to mod, and then (x m) is made as 0 to imod.
If allow time index k from 0 to infinitely, then above subset allocation sequence frequently has the free period of N banded code element.
Yet in order to be fit to the frame time base structure of down link signal, in the exemplary embodiment, k is from 0 to P-1, wherein P=180.In other words, frequently subset allocation sequence for first free period from k=0 to k=96 (=N-1), and begin once more from k=97.Second free period before k=193 (2*N-1) finishes naturally, time index stops and resetting to k=0 at k=179.As a result, restarted from section start by brachymemma and frequency subset allocation sequence second round.
This is shown in the lower part of Fig. 8.The first especially big time slot 891 and the second especially big time slot 892 are located adjacent one another.890 is two borders between the especially big time slot constantly.The frequency subset allocation sequence is since the section start of the k=0 of the first especially big time slot 891, and first free period 893 of accomplishing this sequence at the moment 894 place that is positioned at first especially big time slot 891 k=96.This frequency subset allocation sequence continues to begin second round from k=97.To accomplish second round 895 in the moment after the first especially big time slot finishes.Yet when second round 895 during by brachymemma, k finishes and the second especially big time slot is reset when beginning at 890 places, the first especially big time slot constantly, and subset allocation sequence is restarted from k=0 but not continued completion second round 895 frequently.
The frame time base structure in above especially big time slot, beacon slot, overtime crack etc. repeats in each especially big time slot.
Fig. 9 is the figure according to the exemplary frequency subset allocation module 900 of various embodiment realizations.The base station is to supply wireless terminal to obtain the Network Access Point of network connectivty through air interface.The base station comprises one or more base station sections (BSS).BSS is the part of base station.The BSS of omnidirectional is to corresponding to the wireless terminal in the whole cellular cell of this base station service being provided.The antenna that directed BSS can use specific direction and the subclass of this cellular cell be the wireless terminal communications in the sector of this cellular cell for example partly.
Can comprise that module 900 is as the part of base station or wireless terminal and be used for confirming the frequency subset allocation pattern that should in the sector corresponding to the cellular cell of BSS, use.Exemplary frequency subset allocation module 900 comprises subset allocation determination module 902, cellular cell sign mapping block 904, sector mark mapping block 906 and time index mapping block 908 frequently.
BS can have the BS identifier that is associated with BSS_ slope 912.In certain embodiments, identical BSS_slope912 will be used in the different sectors of a cellular cell.Given BSS has corresponding BSS_slope912 and BSS_sector_ID914 in the communication system.Cellular cell ID mapping block 904 is mapped to bssSlopeIndex value 916 with BSS_slope912.A plurality of BSS corresponding to same cellular cell will have identical bssSlopeIndex value.The cellular cell that adjoins will have different bssSlopeIndex values.
Cellular cell ID mapping block 904 is for example carried out the conversion of value 916 from BSS_slope912 to bssSlopeIndex via look-up table.In certain embodiments, this to organize effective bssSlopeIndex be the integer value in the scope 0:95.
BSS also has the BSS_sector_identifier914 that is associated.Each sector of-this cellular cell has different BSS_sector_ID914.The different B SS of same BS can have identical bssSectorType918.Yet in a preferred embodiment, the BSS that adjoins of same BS does not have identical bssSectorType.Sector ID mapping block 906 is mapped to bssSectorType value 918 with BSS_sector_ID914.In certain embodiments, bssSectorType value=mod (BSS_sector_ID, 3).In some these type of embodiment, BSS_sector_ID is the integer value among the scope 0..5, and bssSectorType is the integer value among the scope 0..2.
In certain embodiments, for the given BSS in the communication system, the value of bssSlopeIndex916 and bssSectorType918 be fix and not in time passing and change.
In some these type of embodiment, expectation uses BSS to confirm bssSlopeIndex value and bssSectorType value corresponding to BSS as the wireless terminal of its attachment point, and uses these to be worth subsequently and calculate subset allocation sequence frequently.
Based structures information 910 when time index mapping block 908 comprises.The time based structures information 910 signs down link structure information that is associated with each BSS when OFDM code element (for example basic) and such as the various marshallings of OFDM code elements such as overtime crack, beacon slot, especially big time slot and the index information that is associated with these marshallings.The time based structures information 910 confirm also whether the OFDM code elements are banded code elements.Time index mapping block 908 receives the current banded symbol index 924 in current down link dlUltraslotBeaconIndex value 922 and the current beacon slot value, and variate k920 when definite.For example, k can be the integer value among the scope 0..179.Current beacon slot index in the current especially big time slot in based structures when current dlUltraslotBeaconIndex value 922 identifies corresponding to the down link of BSS.In certain embodiments, the value of dlUltraslotBeaconIndex is the integer value in the scope 0 to 17.Current banded code element in the current beacon slot in based structures when the current banded symbol index 924 in the current beacon slot value identifies down links.In certain embodiments, the scope of the value of index 924 is 0 to 9.
Frequently subset allocation sequence determination module 902 receives control input bssSlopeIndex value 916, bssSectorType value 918 and time index k value 920.Determination module 902 is confirmed the respective index of subset 928 frequently, and it will use in current banded code element.In certain embodiments, this index is the integer value in the scope 0 to 96.
In certain embodiments; Time index mapping block 908 uses equality k=L*10+m to confirm k; Wherein L is dlUltraslotBeaconslotIndex---the integer value in the scope 0 to 17, and m is the index of the current banded code element in the current beacon slot---the integer value in the scope 0 to 9.In some these type of embodiment, subset allocation sequence determination module 902 uses equality f (bssSlopeIndex, bssSectorType frequently; K)=mod (temp1* (bssSlopeIndex+1), 97), wherein temp1=imod (temp0; 97), temp0=bssSectorType*k+k*k.
The Figure 10 that comprises the combination of Figure 10 A, 10B, 10C, 10D, 10E, 10F and 10G is the table 1000 of one group of exemplary frequency subset in the exemplary embodiment, and these frequency subset are dispensed in the banded symbol section to be used.First row 1002 comprise the frequency subset index of scope 0 to 96.Secondary series 1004 comprises corresponding to each transfers the frequency of subject index value to transfer mask frequently.The frequency that will be used for the banded code element of given OFDM transfers the subject index value through for example subset allocation sequence determination module 902 is definite frequently.In this exemplary embodiment, use 113 OFDM to transfer frequently corresponding to the downlink tone block of base station section attachment point.Frequently transfer mask identifier which will use transfer frequently in the subset frequently.List 113 values corresponding to each clauses and subclauses of frequency subset index, each value is transferred corresponding to 113 indexes of transferring frequently of this group in the downlink tone block frequently.If value is 0, then do not use this to transfer frequently; If value is 1, then uses and to transfer frequently.For example, consider the frequency subset of index=0, use index value=2,5,9,10,12,13,16,17,18,20,24,29,30,34,35,36,38; 39,43,44,45,47,49,52,53,54,55,57,58,59,60,61,63,64,67,69; 70,73,74,76,77,78,80,85,88,89,90,92,94,100,101,102,103,108,109; 110 frequency is transferred, and does not have index value 0,1 and do not use, 3,4,6,7,8,11,14,15,19,21,22,23,25,26,27,28; 31,32,33,37,40,41,42,46,48,50,51,56,62,65,66,68,71,72,75; 79,81,82,83,84,86,87,91,93,95,96,97,98,99,104,105,106,107,111 and 112 frequency is transferred.In certain embodiments, do not use DC to transfer frequently---for example frequently transfer the piece intermediate frequency to transfer the center of index=56 to transfer frequently, it should use even if transfer the mask indication frequently.
Figure 11 be according to various embodiment the exemplary reproduction about the use of the downlink tone block that is associated with the base station attachment point is shown the time based structures Figure 110 0.Based structures comprised the 3rd time cycle 1102 of exemplary reproduction when this was exemplary.
Exemplary the 3rd time cycle 1102 in order order comprise the exemplary time cycle (1104,1106,1108,1110,1112,1114,1116,1118,1120,1122,1124,1126,1128,1130,1132,1134,1136,1138,1140,1142,1144).Exemplary the 4th time cycle 1104 is scheduled for the reception and registration beacon signal.Exemplary second time cycle 1106 is scheduled for the reception and registration user data.Exemplary the 4th time cycle 1108 is scheduled as does not use.Exemplary second time cycle 1110 is scheduled for the reception and registration user data.Exemplary the 4th time cycle 1112 is scheduled as does not use.Exemplary second time cycle 1114 is scheduled for the reception and registration user data.The exemplary cycle very first time 1116 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.The exemplary cycle very first time 1118 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.Exemplary second time cycle 1120 is scheduled for the reception and registration user data.The exemplary cycle very first time 1122 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.The exemplary cycle very first time 1124 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.Exemplary second time cycle 1126 is scheduled for the reception and registration user data.The exemplary cycle very first time 1128 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.The exemplary cycle very first time 1130 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.Exemplary second time cycle 1132 is scheduled for the reception and registration user data.The exemplary cycle very first time 1134 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.The exemplary cycle very first time 1136 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.Exemplary second time cycle 1138 is scheduled for the reception and registration user data.The exemplary cycle very first time 1140 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.The exemplary cycle very first time 1142 is scheduled for uses determined non-NULL to transfer secondary subclass to pass on broadcast control information frequently; And be scheduled on determined empty subset frequently and pass on empty frequency to transfer, its intermediate frequency subset is confirmed according to frequency subset hopping sequences.Exemplary second time cycle 1144 is scheduled for the reception and registration user data.
In the exemplary embodiment; The 3rd time cycle is corresponding to especially big time slot; The 4th time cycle is corresponding to the interval of two coherent OFDM code element transmission time periods; Wherein one of beacon signal transmission and non-transmission of transmitter downlink tone block of having a mind to are scheduled as and will take place, and first kind time interval is corresponding to the wide interval of single OFDM code element that is scheduled for the banded code element transmission of passing on non-beacon broadcast control signal.The cycle very first time in succession in the reproduction structure uses different frequency subset to pass on the broadcasting control signal according to the first frequency subset hopping sequences.
For example, in the exemplary embodiment of Fig. 8, especially big time slot comprises 16416 coherent OFDM symbol time cycles, comprises the beacon slot of 18 indexes, and each beacon slot is wide to be 912 OFDM symbol time cycles.The beacon slot of each index comprises three the 4th intervals, and each the 4th interval is wide to be two OFDM symbol time cycles, and a period 4 is passed on beacon signal, and the piece of frequently transferring intentionally of two period 4 is empty.The beacon slot of each index also comprises 10 period 1, and each period 1 is wide for being used to pass on the OFDM code element transmission time periods of banded code element, and 2 of each marshallings of these period 1 (referring to Fig. 8, m=(0,1) wherein; (2,3), (4,5); (6,7), (8,9)).The beacon slot of each index also comprises 8 second time cycles, and each second time cycle wide is 112 OFDM code elements and is scheduled for 112 OFDM code elements that reception and registration comprises user data.
In the example of Fig. 8, the first frequency subset hopping sequences has 97 different predetermined frequency subset and is used to pass on the control signal in the cycle very first time.Figure 10 provides the example with 97 that in hopping sequences, use different predetermined frequency subset.Yet the exemplary especially big time slot of Fig. 8 comprises 180 cycles very first time.Thus; This especially big time slot comprise first frequently the subset hopping sequences corresponding to the iteration of k=0 to 96---in the frequency subset of wherein these 97 indexes each is all used once, and first frequently the subset hopping sequences corresponding to a part of second iteration of k=97 to 179.The order of the predetermined frequency subset that the first frequency subset hopping sequences is different is the function of cellular cell and/or sector marker.Fig. 7 illustrates the notion of two first different frequency subset hopping sequences that are used for two different base stations transmitters, for example, and as the function of cellular cell and/or sector identifier information.
Figure 12 is the flow chart 1200 that communication equipments such as operational example such as base station for example use the illustrative methods that 113 downlink tone block of transferring frequently convey a message.Operate in step 1202 beginning, wherein this communication equipment is switched on and is initialised.Operation advances to step 1204 from beginning step 1202.
In step 1204, communication equipment is transferred at the empty frequency of confirming during the 3rd time cycle to transmit, non-NULL is in harmonious proportion signal frequently and for example on the reproduction basis, send signal.For example, the 3rd time cycle can be this communication equipment just using reproduction the time especially big time slot in the based structures.Step 1204 comprises substep 1206,1208,1210,1212,1214,1216,1218,1220 and 1222.
In substep 1206, communication equipment confirms that the current symbol time in the 3rd time cycle still was the 4th time cycle corresponding to first, second.If the current symbol time cycle then operated from substep 1206 and advances to substep 1208 corresponding to the 4th time cycle.If the current symbol time cycle then operated from substep 1206 and advances to substep 1214 corresponding to the cycle very first time.If the current symbol time cycle then operated from substep 1206 and advances to substep 1216 corresponding to second time cycle.
In substep 1208, communication equipment determines whether to have dispatched beacon transmissions and transfers in the piece frequently at this and send.If dispatched beacon, then operate from substep 1208 and advance to substep 1210 corresponding to current symbol time; If do not dispatch beacon, then operate from substep 1208 and advance to substep 1212 corresponding to current symbol time.In substep 1210; During the 4th reproduction time cycle; For example during the time cycle that is beacon signal and two coherent OFDM code element transmission times intervals of transferring the reservation of one of piece sky frequently, the arrowband beacon of every frequency tonal signal energy level that any frequency accent that the communication equipment transmission has than sends during the second reproduction time cycle is higher is transferred frequently.In substep 1212, communication equipment resistance system during the 4th reproduction time cycle is sent the said frequency of entering and is transferred piece.Operation advances to substep 1222 from substep 1210 or substep 1212.
In certain embodiments, the different base stations attachment point uses the 4th different in the 3rd time cycle time cycles for example to pass on the beacon signal as the function of cellular cell and/or sector marker in the communication system.For example, in the embodiment of exemplary three sectors, the 3rd time cycle comprised the 4th time cycle of 24 indexes.For example, sectors type 0 attachment point makes index of reference=0,3, and 6,9,12,15,18,21 the 4th time cycle is passed on beacon signal; And with respect to frequently transferring piece in index=1,2,4,5,7,8,10,11; Resistance system transmission during 13,14,16,17,19,20,22,23 the 4th time cycle; Sectors type 1 attachment point makes index of reference=1,4, and 7,10,13,16,19,22 the 4th time cycle is passed on beacon signal; And with respect to frequently transferring piece in index=0,2,3,5,6,8,9,11; Resistance system transmission during 12,14,15,17,18,20,21,23 the 4th time cycle; Sectors type 2 attachment points make index of reference=2,5, and 8,11,14,17,20,23 the 4th time cycle is passed on beacon signal; And with respect to frequently transferring piece in index=0,1,3,4,6,7,9,10; Resistance system transmission during 12,13,15,16,18,19,21,22 the 4th time cycle.
In substep 1214; For the first reproduction time cycle; Banded symbol time cycle of interval duration of OFDM symbol time for example; Communication equipment frequently transfers hopping sequences to confirm above that not the frequency subset of transmitted power and the frequency subset that will send the non-zero modulated symbol above that according to first; The said definite general above that not frequency subset of transmitted power comprises at least 30% of said frequency accent piece intermediate frequency accent, and the said definite frequency subset that will send modulated symbol above that is one of a plurality of predetermined frequency subset that will use.
In certain embodiments; For the cycle very first time given in the 3rd time cycle; Determined empty subset frequently and uniting of non-NULL frequency subset are to be used for a group of base station attachment point to transfer piece to transfer frequently frequently, and the one group of downlink tone block that for example is used for this base station attachment point is transferred frequently.Figure 10 comprises the exemplary frequency subset information corresponding to 97 different empty frequently non-NULLs frequency subset that subset is different with 97.Through utilizing empty mixing of transferring frequently with non-NULL, for example the signal of receiver cycle very first time transmission capable of using such as wireless terminal receiver is carried out channel estimating.In addition, broadcast control information is transmitted by the value of the non-NULL modulated symbol that during the cycle very first time, transmits.
In certain embodiments; Frequency subset corresponding to the cycle very first time given in the 3rd time cycle is as cellular cell, sector marker; And/or transfer piece corresponding to the frequency of the attachment point of communication equipment, confirm with the function of the OFDM symbol time in the timely based structures.For example, there is the different frequency of identical frequency subset to transfer hopping sequences use corresponding to the attachment point that adjoins cellular cell and/or sector.Fig. 9 has described exemplary frequency and has transferred saltus step to confirm.
Operation advances to substep 1218 from substep 1214.In substep 1218, communication equipment is according to generating the OFDM code element from substep 1214 determined frequency subset.Operation advances to step 1220 from step 1218.In step 1220, communication equipment sends from the OFDM code element that step 1218 generated.Operation advances to substep 1222 from substep 1220.
In substep 1216; Communication equipment is in the second reproduction time cycle; For example be used to pass on during 112 coherent OFDM symbol time intervals of user data; Communication equipment uses said frequency to transfer piece to come transmission information, transmits the non-zero modulated symbol during at least 70% of the said frequency accent of wherein said frequency accent piece is used in said second time cycle.For example, during said second time cycle, except that number control signal, also transmit downlink traffic channel segment signals.In substep 1216, in certain embodiments, the different frequency of frequency subset saltus step that logic channel transfers basis and the cycle very first time to be suitable for is frequently transferred the saltus step scheme to jump to physics and is transferred frequently.In some these type of embodiment; Frequency accent saltus step that is suitable for during second time cycle and the frequency subset saltus step both who is suitable for during the cycle very first time utilize cellular cell and/or sector identifier information to confirm saltus step as input, for example frequently transfer saltus step, subset saltus step frequently.For example, same base station section attachment point is used different equalities to saltus step during first and second time cycles.Operation advances to substep 1222 from substep 1216.
In substep 1222, communication equipment upgrades the symbol time index in the 3rd time cycle.For example, in one embodiment, if operation advances to substep 1222 by substep 1210 or 1222, then index is upgraded by 2 OFDM code element transmission time periods; If operation advances to substep 1222 by substep 1214, then index is upgraded by 1 OFDM code element transmission time periods; If operation advances to substep 1222 by substep 1216, then index is upgraded by 112 OFDM code element transmission time periods.In various embodiments, renewal is used mould to calculate and is made and begins for follow-up the 3rd time cycles of the next one such as for example especially big time slots when index was accomplished in the 3rd time cycle.Operation advances to substep 1206 from substep 1222.
In various embodiments, the duration of the second reproduction time cycle is at least 10 times of duration in the cycle very first time.In certain embodiments, the duration of second time cycle is greater than 50 times of duration in the cycle very first time.In certain embodiments, the duration of second time cycle is greater than 100 times of duration in the cycle very first time.In certain embodiments; Because second time cycle is corresponding to the user data transmission cycle; Balance between first and second time cycles and in time the location in the based structures of time cycle; The first and the 4th time cycle of transmitting such as user data of no use wherein is to realize not having the significant consideration of the subscriber data traffic of interrupting from user's viewpoint, is especially for example needing in the application of weak point stand-by period such as voice application etc.In certain embodiments, exemplary the 3rd time cycle is with the 4th time cycle, carrying out the beacon signal that frame synchronization for example etc. is used synchronously the time because the 4th time cycle was used to carry wireless terminal.
In various embodiments, for the cycle very first time, transfer hopping sequences to confirm to use in a plurality of predetermined frequency subset which frequently for first group.For example, as far as given base station attachment point, be used in the based structures during reproduction the given cycle very first time first frequently the subset hopping sequences confirm to use the frequency subset information of one of 97 row corresponding to the table 1000 of Figure 10.In various embodiments, the different base station attachment points that adjoins uses different cycle very first time frequency subset hopping sequences in the wireless communication system.
In various embodiments; First and second time cycles betided in the 3rd time cycle that on predetermined basis, repeats; OFDM code element transmission time periods in the cycle very first time uses the mould increments index to come index, and the first frequency subset hopping sequences is the function of mould increments index.For example, exemplary especially big time slot can comprise the cycle very first time of 180 indexes, but first frequently transfers hopping sequences in this especially big time slot, to begin repetition on the 98th the cycle very first time.
In various embodiments, the number corresponding at least one predetermined frequency subset in sky frequency subset and the non-NULL frequency subset is a prime number.In the example of Figure 10, this prime number is 97.
In one exemplary embodiment, it is as follows given also to be called as the frequency subset allocation sequence of subset hopping sequences frequently sometimes.
Make f (bssSlopeIndex, bssSectorType, k)=(bssSlopeIndex+1)/((bssSectorType*k+k 2) be illustrated among the banded code element k index with selecteed frequency subset, wherein arithmetic operator (+, 2, *, /) in each all defines in field N, wherein N is a prime number.N=97 for example;
The index of bssSlopeIndex=cell slope value, and be identical for each sector of this cellular cell preferably; Adjoin cellular cell and should have different values for bssSlopeIndex; Parameter b ssSlopeIndex equals 0,1 ..., N 1-1, N wherein 1≤N; For example in one embodiment, N 1=96;
The bssSectorType=sector index; For example suppose sectors type T the group 0,1 ..., 5}, 0,1} or 0,1, among the 2}; Adjoining the sector and should have different T values in the given base station;
Function in the f=base station section.
The index of k=strip, k=L*10+m, wherein
Banded symbol index in the m=beacon slot, for example, m be the group 0,1 ..., the value among the 9},
Beacon slot index in the especially big time slot of L=, for example, the L= group 0,1 ..., the value among the 17}.
Express with slightly different form:
k＝L*10+m；
temp0＝bssSectorType*k+k*k；
temp1＝imod(temp0，N)；
F (bssSlopeIndex, bssSectorType, k)=mod (temp1* (bssSlopeIndex+1), N); Wherein for integer x and m, modular function mod (x, m) be defined as mod (x, m)=x-m*floor (x/m), wherein function f loor (x) is defined as the maximum integer that is less than or equal to x; For integer x and m, if (x*y m) equals 1 to mod, and then (x m) equals y to mould inverse function imod, wherein 1≤y≤m.If (x is 0 m) to mod, and then (x m) is made as 0 to imod.
In various embodiments, first frequently the subset hopping sequences be the function of cellular cell identifier such as ramp value for example.In various embodiments, first frequently to transfer hopping sequences also be the function of sector marker value.
Figure 13 is the figure according to the exemplary base 1300 of various embodiment realizations.Exemplary base 1300 comprises receiver module 1302, transmitter module 1304, processor 1306, I/O interface 1307 and the memory 1308 that is coupled via bus 1310, various unit can be on bus 1310 swap data and information.Memory 1308 comprises routine 1312 and data/information 1314.Processor 1306 executive routines 1312 such as CPU and use the data/information 1314 in the memory 1308 to control the operation of base station 1300 and realize these methods for example.
For example receiver module 1302 such as OFDM receiver is coupled to reception antenna 1303, and base station 1300 receives the uplink signal from wireless terminal via it.For example transmitter module 1304 such as OFDM transmitter is coupled to transmitting antenna 1305, and the base station is sent down link signal via it to wireless terminal.Down link signal comprises banded symbol signal during the cycle very first time, it comprises with corresponding to empty frequently the assembling with non-NULL of cycle very first time frequency subset hopping sequences assembles frequently, and non-NULL is transferred frequently during the cycle very first time and passed on broadcast control information.Down link signal also is included in the signals such as OFDM code element of for example passing on user data that transmit during second time cycle, and the for example beacon that during the 4th time cycle, transmits frequently tonal signal with have a mind to frequently to transfer signal such as piece spacing wave.In various embodiments, base station 1300 comprises a plurality of sectors, for example 3 sectors.In certain embodiments, a plurality of receiver/transmitter modules are to corresponding in these sectors each.
I/O interface 1307 is coupled to internet and/or other network node with the base station, for example other base station, router, AAA node, home agent node etc.Through backhaul network is coupled in base station 1300, I/O interface 1307 allows to use the wireless terminal of base station 1300 attachment points to participate in the communication session that uses different base stations as another wireless terminal of its point of network attachment.
Routine 1312 comprises Communications routines 1316 and base stations control routine 1318.Communications routines 1316 is carried out the various communication protocols that realized by base station 1300.Base stations control routine 1318 comprise receiver control module 1320, transmitter control module 1322, time cycle type determination module 1333, I/O interface control module 1324, period 1 frequently subset determination module 1326, period 1 code element generation module 1328, period 4 code element generation module 1330, second round code element generation module 1332 and transfer the saltus step module second round frequently.
The operation of receiver control module 1320 receiver control 1320, for example with receiver be tuned to whole and power level adjustment and control up link OFDM symbol recovery and decode operation of keynote when the uplink carrier frequency that just using of attachment point, control.The transmission packets and the recovery that transmit via backhaul are for example controlled in 1307 operations of I/O interface control module 1324 control I/O interfaces.
Transmitter control module 1322 controls transmitter the operation of module 1304.Transmitter control module 1322 comprises very first time periodic Control module 1334, the 4th time cycle control module 1336 and the second time cycle control module 1338.Very first time periodic Control module 1334 is in the cycle very first time, controls transmitter operation during the predetermined period of time of passing on the banded code element of control information during it, to transmit in the reproduction down link structure that is for example just using the base station.The 4th time cycle control module 1336 is in the 4th time cycle, for example controls transmitter operation during beacon signal and the scheduled time interval of frequently transferring one of piece spacing wave during it, to transmit in the reproduction down link structure that just using of base station.1,338 second time cycles of the second time cycle control module, control transmitter operation during the predetermined period of time that user data transmits in the based structures during reproduction down link during it.In certain embodiments, based structures is subdivided into the reproduction sequence of the 3rd time cycle of index during the reproduction down link, and each the 3rd time cycle is divided into a plurality of cycles very first time, a plurality of second time cycle and a plurality of the 4th time cycle.
Time cycle type determination module 1333 confirm current time interval equal time interval for example whether be the base station just using the reproduction down link time one of the cycle very first time, second time cycle or the 4th time cycle in the based structures.The transmission that is used between the various replacement modules that signal generates and transmission is used of confirming of module 1333 is controlled.For example, if the times that module 1333 is confirmed to be considered corresponding to the first kind time cycle, then utilize module 1326,1328 and 1334, and if the times that module 1333 is confirmed to be considered corresponding to the 4th type time cycle, then utilize module 1330 and 1336.
Period 1 frequently subset determination module 1326 according to first frequently the subset hopping sequences be to confirm on it not frequency subset of delivering power the first reproduction time cycle, determined on it not the frequency subset of delivering power comprise that downlink tone block intermediate frequency that the base station attachment point is just using transfers at least 30%; Period 1 frequency subset determination module 1326 is a frequency subset of the first reproduction time cycle confirming to want on it delivering power according to the first frequency subset hopping sequences also.In various embodiments, for the given cycle very first time in the reproduction down link structure, the downlink tone block of base station attachment point be divided on it the frequency subset of delivering power not with its on want the frequency subset of delivering power.For example, in the exemplary embodiment of using Figure 10 information, 97 different divisions are shown, each is associated with index number, and interval for any given very first time, chooses one of these 97 different divisions.The function of the very first time periodic key when in certain embodiments, the period 1, subset determination module 1326 was as cellular cell identifier, sectors type identifier and reproduction down link frequently in the based structures is carried out definite.Fig. 9 has described the exemplary frequency subset allocation module 900 of the part that can be embodied as base station 1300, for example as the module in the base station 1,300 1326.
Period 1 code element generation module 1328 generates the OFDM code element that will during the cycle very first time, transmit.Period 1 code element generation module 1328 uses to be gone up the frequency subset of wanting delivering power from determined its of module 1326 and confirms which calls in the reception and registration modulated symbol frequently; For example carry the modulated symbol of control broadcast data, and generate the OFDM code element that will during the cycle very first time, transmit.
Second round, 1332 generations of code element generation module were used for the sequence OFDM code element of second time cycle, and at least some pass on the modulated symbol of carrying user data, the for example part of downlink traffic channel segment in these OFDM code elements.Frequently transfer the second round that second round, the code element generation module used saltus step module 1335 logical channels to be transferred to the frequency that physics transfers frequently frequently and transfer saltus step, and the different function of use and period 1 frequency subset determination module 1326.
Period 4 code element generation module 1330 during for reproduction in the based structures the 4th given time cycle generate one of the wide beacon signal of two code elements and downlink tone block spacing wave.Period 4 code element generation module 1330 comprises beacon module 1331.Beacon module 1331 generates beacon signal; The beacon signal that is generated transmits during according to when reproduction based structures some in said the 4th time cycle; The beacon signal that is generated is a narrow band signal, and it comprises that any frequency that has than during said second time cycle, sends transfers the beacon of higher every frequency tonal signal energy to transfer frequently.
Data/information 1314 comprises downlink tone block information 1340; The transmitter control information 1342 of storage; Base station cell cell identifier information 1344; Base station sectors identifiers information 1346; Period 1 is subset saltus step equality information 1348 frequently; The time based structures information 1350; Frequency adjusting power level information 1352; Period 1 is subset index map information 1354 frequently; Current time information 1355 during reproduction in the based structures; Beacon slot index 1356 in the especially big time slot; Banded symbol index 1358 of the cycle very first time in the beacon slot; Cycle very first time symbol index 1360; Be the interval frequency subset index of confirming 1362 of the current very first time; The control data 1364 that is used for the period 1 code element; And user data 1366.
Downlink tone block information 1340 comprises one group of downlink tone that the base station attachment point uses, and for example one group 113 adjoin accent frequently, and the carrier frequency that is associated with downlink tone block.The transmitter control information 1342 of being stored comprises the information that module 1332 is used.Base station cell cell identifier information 1344 comprises the local unique cellular cell identifier that is associated with base station 1300; For example such as scope 0; ... base station ramp value such as the integer value in 95, and slope, base station index value, wherein each slope index value is associated with ramp value.Base station sectors identifiers information 1346 comprises base station sectors identifiers and base station section types value, for example with the sector associated base station sectors type identifier of transmitter module 1304, for example group 0,1, the value among the 2}.
Period 1 frequency subset saltus step equality information 1348 comprises the information that is used to generate frequency subset hopping sequences by period 1 frequency subset determination module 1326, the information of the period 1 index during for example about base station cell cell identifier, base station section type identifier and reproduction in the based structures.
The time based structures information 1350 comprise OFDM code element transmission time block information and about the information of interval marshalling of a plurality of OFDM code element transmission times in the reproduction down link structure that uses by base station transmitter 1304, for example gap information, overtime crack information, beacon slot information, especially big gap information or the like.The time based structures information 1350 also comprise information, the information of second time cycle of sign, the information of the 4th time cycle of sign, the information of the 3rd time cycle of sign and the information that comprises the index that is associated with various types of time cycles that identifies the cycle very first time, for example occur the first time of the time cycle of the first kind in especially big time slot, the time cycle of the first kind occurs or the like the second time in especially big time slot.
Frequently adjusting power level information 1352 comprises the power level information that is associated with various types of down link signals, and for example transfer very first time periodic modulation symbol power level frequently, be used at least some at least some pilot channel power level information of traffic channel power level information, the modulated symbol that is used for during second time cycle, passing on of the modulated symbol of passing on during second time cycle frequently by tonal signal modulated symbol power level information, non-NULL for beacon.
Period 1 frequently subset index map information 1354 comprise that with each emptyly frequently is in harmonious proportion the related information of non-NULL frequency phase modulation that a group id goes out with a group id goes out in a plurality of frequency subset index the non-NULL that this group id goes out is transferred frequently and is confirmed as at this frequency subset index is will during the given cycle very first time, use under the situation of the frequency subset that will use of determination module 1326.
Current location during reproduction down link that the current time information 1355 sign base transmitter module 1304 during reproduction in the based structures 1355 are just being used in the based structures.Beacon slot index 1356 in the especially big time slot, for example the integer index value L among the scope 0..17 identifies the current time corresponding to which beacon slot in the especially big time slot.Banded symbol index 1358 of cycle very first time in the beacon slot, for example, scope 0 ... the integer value m in 9, the current time identify during corresponding to the cycle very first time this time corresponding to beacon slot in the banded code element of which index.Banded symbol index 1360 of the cycle very first time, integer value k for example is identified at the index value that is used for banded code element during cycle very first time of especially big time slot, and for example, k is the integer value among the scope 0..179.In certain embodiments, k is by 1326 generations of the first frequency subset determination module as the function of value L and m.For the interval frequency subset index of confirming 1362 of the current very first time is results of determination module 1326, it is the function of banded symbol index 1360 of base station cell cell identifier 1344, base station sectors identifiers 1346 and the cycle very first time.
The control data 1364 that is used for the period 1 code element comprises and will pass on the modulated symbol to transfer control data/information of broadcasting frequently at non-NULL during the cycle very first time.User data 1366 comprises data/information, for example data/information of will be during second time cycle passing on via the modulated symbol of traffic channel segment such as voice, video, audio frequency, text, image, file.
In various embodiments; During the second reproduction time cycle; For example have 113 downlink tone block such as downlink tone block of frequently transferring to be used for transmission information, what said downlink tone block was transferred frequently at least 70% transmits the non-zero modulated symbol during being used in for second time cycle.In certain embodiments, the duration of second time cycle is at least 10 times of duration in the cycle very first time.In one exemplary embodiment, the duration in the cycle very first time is that 1 OFDM code element transmission time is interval, and the duration of second time cycle is that 112 OFDM code element transmission times are interval.In certain embodiments, based structures for example makes a plurality of cycles very first time such as 2 or 3 be grouped in together the time.In certain embodiments, the time based structures make the predetermined group in the cycle very first time have and the 4th time cycle, for example during it, can transmit the identical duration of the 4th time cycle of beacon signal.
In various embodiments; Period 1 frequently subset determination module 1326 just using for base transmitter module 1304 the reproduction down link time in the based structures the given cycle very first time definitely to use in a plurality of predetermined frequency subset which; For example, use which subset index frequently from the table 1000 of Figure 10.In certain embodiments, the predetermined numeral of subset index value frequently is a prime number, for example 97.
In various embodiments, first and second time cycles betided in the 3rd time cycle that on predetermined basis, repeats.For example, the 3rd time cycle can be exemplary especially big time slot, and each cycle very first time can be the banded symbol time cycle and second time cycle can be one group of OFDM code element transmission time periods that is used to pass on user data that links up.
In certain embodiments; Period 1 frequency subset determination module 1326 uses period 1 frequency subset saltus step equality information 1348 to realize equality: f (bssSlopeIndex; BssSectorType, k)=(bssSlopeIndex+1)/((bssSectorType*k+k 2), wherein: (k) expression will be the index with frequency subset of the base station section selection of bssSlopeIndex value and bssSectorType value in banded code element k to f for bssSlopeIndex, bssSectorType; Arithmetic operator (+, 2, *, /) in each all defines in field N, wherein N is a prime number; BssSlopeIndex=one class value 0,1 ..., N 1Local unique cellular cell identifier value, wherein N among the-1} 1≤N and N 1It is the non-zero positive integer; BssSectorType=from the group 0,1 ..., 5}, 0, and 1} with 0,1, the sector marker value index of the sector of one of 2}; Function in the f=sector of base station; And k is a nonnegative integer.In some these type of embodiment, N=97, N 1=96.In certain embodiments, k=L*n+m, wherein banded symbol index in the m=first kind time slot and m are nonnegative integers; First kind time slot index in the L=second type time slot; And the number of the banded code element of index in the n=first kind time slot.In certain embodiments, said first kind time slot is a beacon slot, and the said second type time slot is especially big time slot, wherein m=group 0,1 ... the value among the 9}; Wherein L=group 0,1 ..., the value among the 17}; And n=10.
In certain embodiments, the 4th belongs to the time that keeps for broadcast channel with the cycle very first time, and the 4th time cycle is corresponding to the time interval that keeps for the beacon subchannel, and the cycle very first time is corresponding to the time that is non-beacon broadcast subchannel reservation.In certain embodiments; First and the 4 two time cycle during the transmitted symbol time interval to be called as banded symbol time interval, and banded symbol time interval further is categorized as the banded symbol time of the interval and non-beacon of the banded symbol time of beacon interval.
Figure 18 illustrates the for example figure of overhead signal data such as banded symbol data.Banded symbol data can be divided into code block.About the period type determination module 1333 shown in Figure 13, or confirm all that about the period type determination module 1530 shown in Figure 15 time cycle or code element are beacon symbols (the 4th time cycle), banded code element (the cycle very first time) or user data (second time cycle).Control transmitter the banded code element of transmission during also being called as second time cycle of overhead data time cycle about the transmitter control module 1322 shown in Figure 13.Perhaps in the situation of wireless terminal, send information to processor 1506 as the result of method and apparatus described herein about the very first time period treatment module 1534 shown in Figure 15.Banded code element can be shown in Fig. 8, and base is with reference to having period-luminosity relation with such as beacon etc. the time.Refer again to Figure 18, the banded code element of several OFDM can be included in the code block.Several banded code element code blocks 1810,1813,1816,1819 and 1822 shown in the figure, wherein each comprises the N bit, it can comprise for example 6 banded code elements.
Each banded code element code block can be divided into fixed bit and use data 1825 and flexible bit to use data 1830.Fixed bit uses data 1825 to be shown to have N1 bit.Bit uses data 1830 to be shown to have N2 bit flexibly.In example, N1+N2=N.Fixed bit use data 1825 mean these bits and have predetermined use.That is, the use of these bits is by the determining positions of these bits in code block, but needn't definition clearly in a certain message header.For example, some possibly be pre the software version that is used to identify the base station by bit.As another example, other bits can be used for the indication mechanism time.Also some other bit can be used for indicating access priority.For example, if base station load is very heavy, then possibly have only the high-priority users can access base station, or the service that is for example allowed change based on load.Fixed bit uses bit also to can be used for indication carrier wave or sector configuration.For example, these bits can be used for indicating any carrier wave or have what carrier waves just to be used, or have what sectors just to be used.Fixed bit uses bit also to can be used for the transmitting power of indicating transmitter to use, and for example is unit with dBm.
Bit uses data 1830 to can be used for providing some flexible overhead data flexibly.Typically, bit uses data 1830 will have at least 3 fields flexibly: type field, length field and data field.The data that the type field indication is included in the flexible bit use data 1830 are any types.How long these data of length field indication have.Data field comprises the data that just are being sent out.For example, bit use data can be other carrier waves or other sector information on loads flexibly.For example, the base station can be to the load condition at wireless terminal broadcasting another place, sector in the base station.This can for example help the wireless terminal decision whether to switch to this another sector.In this example, type field can use data 1830 to be designated other sector information on loads flexible bit.Bit uses the length field of data 1830 will indicate these data (other sector information on loads) how long to have flexibly.So data field will comprise the data about the load of these other sectors.Flexibly to use a kind of possibility of data 1830 to be that these data can continue longer than N2 bit for bit.That is, can last till 1813 from piece 1810 such as reports such as other sector report datas.In this situation, wireless terminal is known the data of using data 1830 from banded block of symbols 1810 with from banded block of symbols 1813 combinations from flexible bit.
It is periodic that fixed bit is used the data in the data 1825, and wherein certain one-period is with respect to the regular time benchmark, such as beacon for example.The periodicity of data of different types can be different.For example, the information on load in the sector can be broadcasted in each banded block of symbols, and other data, possibly only broadcast once in other banded block of symbols at each such as software version information for example.Data block 1844 and 1846 is to use data corresponding to the fixed bit of banded block of symbols 1813.Data block 1848 and 1850 is to use data corresponding to the fixed bit of banded block of symbols 1816, or the like.Piece 1840,1844,1848,1852,1856 and 1860 all is the data of same type with the N1A mark to indicate it all, for example the sector information on load.But piece 1842 and 1846 is data of different types.For example, the piece 1842 that is labeled as N1B can be a systems soft ware information, and it no longer repeats to be labeled as up to the next one piece of N1B, and promptly piece 1850.Thus, the cycle of software version information is the twice in the cycle of sector information on load.The piece 1846 that is labeled as N1C can be an access priority information, and in this example, it repeats in piece 1854 once more.Exemplary cycle comprises some values about 10 milliseconds, 100 milliseconds, 1 second and 1 minute.
Figure 19 illustrates the flow chart that uses banded symbol data to transmit the method for information.In step 1920, the sign beacon time cycle.The beacon time cycle is the reference time, for example the beginning of beacon slot.In step 1920, sign has the overhead signal periodic expense repetition time periodic groups relevant with the beacon time cycle.For example, expense repetition time periodic groups can be non-beacon strip.In step 1930, sign has the periodic data payload repetition time periodic groups of the data payload relevant with the beacon time cycle.Data payload repetition time periodic groups can be the user data time cycle, also is called as for second time cycle.In step 1940, expense repetition time periodic groups is divided into fixed bit uses cycle repetition time son group and bit flexibly to use cycle repetition time son group, for example as about shown in Figure 18.
Step 1950 is optional to 1980.In step 1950, the fixed bit that generates the first kind is used message.In step 1960, the fixed bit that generates second type is used message.In step 1960, identify the period 1 of the re-transmitted of the fixed bit use message that is used for the first kind for transmission.For example, the fixed bit of first kind use message can be message 1840,1844,1848,1852,1856,1860 or the like.In step 1970, identify the second round of the re-transmitted of the fixed bit use message that is used for second type for transmission.It can be message 1842,1850 and 1858 or the like that the fixed bit of second type is used message.It can be one of software version, system time, access priority, information on load, carrier wave configuration, sector configuration and through-put power that the fixed bit of the first kind is used message.Use the flexible bit of cycle repetition time son group to use message can comprise other carrier load message about flexible bit.Using the flexible bit of cycle repetition time son group to use message about flexible bit can be other sector load message.
The Figure 14 that comprises the combination of Figure 14 A and Figure 14 B is the flow chart according to the illustrative methods at the operate wireless terminal of various embodiment.Operate in beginning in the step 1402, wherein wireless terminal is energized and initialization.Operation advances to step 1404 from beginning step 1402.
In step 1404, the attachment point transmitter receives beacon signal to wireless terminal from the base station during the 4th time cycle.Operation advances to step 1406 from step 1404.In step 1406, the cellular cell and/or the sector identifier information (1408,1410) of the beacon signal that wireless terminal is confirmed to receive corresponding to the attachment point transmitter from the base station.Operation advances to step 1412 from step 1406.In step 1412, wireless terminal uses this to receive base synchronizing information when beacon signal is confirmed.For example, wireless terminal is confirmed synchronizing information beginning of for example especially big three time cycles of time slot grade in an imperial examination in the based structures when confirming the reproduction down link.Subsequently in step 1414, wireless terminal uses from the determined synchronizing information of step 1414 down link of wireless terminal to be received and is synchronized to base station attachment point transmitter.Operation advances to step 1416 from step 1414.
In step 1416, wireless terminal receives the down link signal from base station attachment point transmitter on the basis of carrying out.Operation advances to step 1418 from step 1416.In step 1418, wireless terminal confirms that the current symbol time in the 3rd time cycle still was the 3rd time cycle corresponding to first, second.If the current symbol time in the 3rd time cycle was then operated from step 1418 and is advanced to step 1420 corresponding to the 4th time cycle; If the current symbol time in the 3rd time cycle was then operated from step 1418 and is advanced to step 1422 corresponding to second time cycle; If the current symbol time in the 3rd time cycle was then operated from step 1418 and is advanced to step 1426 via connected node A1424 corresponding to the cycle very first time.
In step 1420, wireless terminal monitors, recovery are also handled beacon signal (if receiving).In certain embodiments, some the 4th time cycles pass on beacon signals and some the 4th time cycles corresponding to by base station attachment point transmitter invalid have a mind to downlink tone block.Operation advances to step 1442 from step 1420.
In step 1422, the wireless terminal recovery is also handled the OFDM code element that comprises user data.Step 1422 comprises substep 1423.In substep 1423, wireless terminal uses to be transferred the saltus step equality to be used for logic channel transferred frequently frequently to be mapped to physical channel and to transfer frequently, and said frequency transfers the frequency subset hopping sequences equality that uses during saltus step equality and the said cycle very first time different.In various embodiments, the saltus step function of substep 1423 uses in cellular cell id information 1408 and the sector ID information 1410 at least one as input.Operation advances to step 1442 from step 1422.
In step 1426, the wireless terminal recovery is also handled banded code element.Step 1426 comprises substep 1428,1430,1432,1434,1436 and 1438.In substep 1428, wireless terminal confirms for example to be worth in the 3rd time cycle one time of k grade in an imperial examination periodic key (substep 1429).Operation advances to substep 1430 from substep 1428.
In substep 1430, wireless terminal is confirmed cycle very first time frequency subset index 1431 as the function of the very first time periodic key 1429 in the 3rd time cycle, determined cellular cell identifier information 1408 and determined sector identifier information 1410.For example, in substep 1430, can use and the identical frequency subset saltus step function of describing about flow chart 1200 and base station 1300 in the past that is used for the cycle very first time.Operation advances to substep 1432 from substep 1430.In substep 1432, wireless terminal use the determined cycle very first time frequently subset index value 1431 and the cycle very first time of being stored frequently subset index frequently subset map information 1433 and confirm the subclass that empty subclass of transferring frequently and non-NULL are transferred frequently.In one exemplary embodiment, map information 1433 can comprise the information of the table 1000 of Figure 10.Operation advances to substep 1434 from substep 1432.
In substep 1434, wireless terminal recovers the modulation symbol values by the non-NULL subset reception and registration frequently of the banded code element that identifies.Operation advances to substep 1436 from substep 1434.In substep 1436, wireless terminal recovers the broadcast control data by the modulation symbol values reception and registration that is recovered.Operation advances to substep 1438 from substep 1436.In substep 1438, wireless terminal uses base station attachment point transmitter to transfer the knowledge of sending to carry out channel estimating in resistance during the cycle very first time built in the frequency of determined empty subset frequently according to the frequency subset saltus step assigned sequence of this attachment point.In various embodiments, substep 1434,1436 carry out with different order with 1438 operation and/or substep 1434,1436 and 1438 in one or morely jointly carry out.For example, channel estimating can be recovered prior to broadcast control data.Operation advances to step 1442 from step 1426 via connected node B1440.
In step 1442, wireless terminal upgrades the symbol time index in the 3rd time cycle.The path of depending on step 1442, in certain embodiments, the amount that index is upgraded is different.For example; In one exemplary embodiment; The 4th time cycle took 2 coherent OFDM code element transmission time periods, and second time cycle took 112 coherent OFDM code element transmission time periods, and the cycle very first time takies single OFDM code element transmission time periods.The renewal of step 1442 considers that also the period 3 index for example uses mould to operate in for the 3rd time cycle and restart when accomplishing.In certain embodiments, the cycle very first time, frequency subset index value k was reset when for example new the 3rd new time cycles such as especially big time slot begin, and for example was 0.
Operation advances to step 1418 from step 1442, and wherein wireless terminal confirms that the current symbol time index in the 3rd time cycle still was the 4th time cycle corresponding to first, second.
Figure 15 is the figure according to the example wireless terminal 1500 of various embodiment realizations.Example wireless terminal 1500 can realize the method for the flow chart 1400 of Figure 14.Example wireless terminal 1500 comprises receiver code block 1502, transmitter code block 1504, processor 1506, I/O equipment 1507 and the memory 1508 that is coupled via bus 1510, wherein each unit can be on bus 1510 swap data and information.Memory 1508 comprises routine 1512 and data/information 1514.Processor 1506 executive routines 1512 such as CPU and use the data/information 1514 in the memory 1508 to control the operation of wireless terminal and realize these methods for example.
For example receiver module 1502 such as OFDM receiver is coupled to reception antenna 1503; Wireless terminal 1500 receives the down link signal from base station attachment point transmitter via it, and said down link signal comprises beacon signal, banded symbol signal and user data signal.For example transmitter module 1504 such as OFDM transmitter is coupled to transmitting antenna 1505, and wireless terminal 1500 sends uplink signal via it to the base station section attachment point.In certain embodiments, the same antenna is used for receiver module 1502 and transmitter module 1504, for example combines duplex module.
I/O equipment 1507 comprises, for example microphone, keyboard, key plate, mouse, switch, camera, loud speaker, display etc.I/O equipment 1507 allows user input data/information, visit dateout/information, control application and the initialization of wireless terminal 1500 and/or controls at least some functions, for example initialize communications session.
Routine 1512 comprises Communications routines 1516 and wireless terminal control routine 1518.Communications routines realizes the various communication protocols that wireless terminal uses.Wireless terminal control routine 1518 comprise receiver control module 1520, transmitter control module 1522, I/O device control module 1524, the time base determination module 1526, time synchronized adjusting module 1528, time cycle type determination module 1530, very first time period treatment module 1534, the 4th time cycle processing module 1548, the second time cycle processing module 1552, attachment point identification module 1556 and time base module 1558 synchronously.
The various functions of receiver control module 1520 receiver control modules 1502, for example control the searching carrier search routine and with receiver be tuned to downlink carrier frequency.Transmitter control module 1522 controls transmitter the operation of module 1504, for example module 1522 control uplink carrier settings, uplink frequency and the time keynote whole, up link OFDM code element constitutes and transmission and transmitter power level.The operation of I/O device control module 1524 control I/O equipment 1507.
Time base determination module 1526 is synchronously confirmed the time base synchronizing information about the 3rd time cycles of reproduction such as for example especially big time slot of base station attachment point transmitter.Base synchronizing information when the synchronous determination module 1526 of base uses one or more beacon signals of receiving to confirm in the time of for example.Time base adjusting module 1528 synchronously uses from module 1526 when determined the base synchronizing information to come simultaneous downlink to receive.For example, time base adjusting module 1528 simultaneous downlinks synchronously receives and makes banded symbol signal to be resumed, and these banded symbol signals are from receiving corresponding to the same base station attachment point of receiving beacon signal of deriving synchronizing information from it.
The various dissimilar time cycles in based structures during reproduction down link that time cycle type determination module 1530 sign base station attachment points are just using; For example; During it, transmit the time cycle of the first kind of the banded code element of passing on broadcast control data; The time cycle of the 4th type that one of beacon signal and downlink tone block are empty transmits during it, and the time cycle that comprises second type that a plurality of OFDM code elements of user data transmit during it.Time cycle type determination module 1530 comprises cycle very first time identification module 1532, the cycle very first time in its bigger the 3rd time cycle of reproduction of sign, the for example banded symbol time cycle in the especially big time slot of module 1532 signs.
Very first time period treatment module 1534 is recovered and is handled the banded code element of receiving that transmits during the cycle very first time.The base station section attachment point that sends banded code element uses corresponding subset hopping sequences frequently during the cycle very first time and banded symbol time cycle; But during the other times cycle in the 3rd time cycle; For example during beacon signaling time cycle and user data signaling time cycle, do not use this frequency subset hopping sequences.Different base stations sector attachment point transmitter uses different frequency subset hopping sequences in the wireless communication system local zone.Very first time period treatment module 1534 comprises that subset index determination module 1538, vacuous subset/nonvoid subset determination module 1540, modulated symbol recovered module 1542 frequently, control data recovers module 1544 and channel estimation module 1546 very first time periodic key determination module 1536, the cycle very first time.
Very first time period determination module 1536 is just confirmed the index with the cycle very first time of the 3rd time cycle processing.For example, in certain embodiments, for example each the 3rd time cycle such as especially big time slot comprises the cycle very first time of 180 indexes, banded symbol time cycle, and wherein k is the index value among the scope 0..179.
The cycle very first time, frequency subset index determination module 1538 was as the cycle very first time that identifies in the 3rd time cycle; For example from the index value of module 1536, the function of cellular cell identifier information and sector identifier information is confirmed cycle very first time frequency subset index.For example, in certain embodiments, be that attachment point recovers via the information that beacon signal transmits from same base station corresponding to cellular cell that has sent the base station attachment point of receiving banded code element that just is being processed and sector identifier information.In certain embodiments, cycle very first time subset index determination module 1538 uses as above frequently for example about Figure 12,13 or 14 described frequency subset saltus step functions.In one exemplary embodiment, cycle very first time frequency subset index determination module 1538 is confirmed one of 97 index of table 1000 among Figure 10.
The cycle very first time frequency subset index that vacuous subset/nonvoid subset determination module 1540 uses are confirmed by module 1538 indexes frequency subset map information with the cycle very first time frequency subset of being stored and confirms empty frequency subset and non-NULL subset frequently.Modulated symbol recovers module 1542 and recovers to be transferred frequently by the non-NULL of banded code element the modulation symbol values of reception and registration.Control data recovers the broadcast control data that module 1544 recoveries are passed on from the modulation symbol values that is recovered of module 1542.Channel estimation module 1546 use base station attachment point transmitters transfer the knowledge of sending to carry out channel estimating in resistance during the cycle very first time built in the frequency of determined empty subset frequently according to the frequency subset saltus step assigned sequence of this attachment point.
The 4th time cycle processing module 1548 is handled the signal that during the 4th time cycle, receives, and for example beacon signal is empty with the downlink tone block of having a mind to.The 4th time cycle processing module 1548 comprises handles the beacon module 1550 receive beacon signal, for example identifies beacon and transfers, identifies the sequence that beacon transfers frequently frequently and/or confirm corresponding to the cellular cell of receiving beacon signal and/or sector identifier information.Attachment point identification information module 1556 obtains and/or confirms the identification information corresponding to interested attachment point, and for example wireless terminal is sought to connect or the current attachment point that just is being connected to.In certain embodiments, wireless terminal can receive cellular cell and/or the sector identifier information that transmits via beacon signal, for example ramp value and sector index value.In certain embodiments, attachment point information module 1556 is further handled this type of information, for example obtains slope index value and the sectors type value used by cycle very first time frequency subset index determination module 1538.
The second time cycle processing module 1552 receives and handles the OFDM code element that comprises user data during second time cycle; Said second time cycle, the duration of said second time cycle was several times at least of duration in the said cycle very first time in said the 3rd time cycle.The second time cycle processing module 1552 comprises transfers saltus step module 1554 frequently.Frequently transferring saltus step module 1552 to use logic channel to be transferred to physics frequently transfers saltus step function and cellular cell and/or sector identifier information to confirm frequently to transfer saltus step frequently.Module 1554 transfers the saltus step function to use and the different equality of frequency subset saltus step function that during the cycle very first time, uses at the frequency that uses during second time cycle.
Time base module 1558 is safeguarded and base when upgrading the code element of wireless terminal 1500, is for example upgraded the symbol time index in the 3rd time cycle.In one exemplary embodiment; The duration in the cycle very first time is 1 OFDM code element transmission time periods; The duration of the 4th time cycle is 2 OFDM code element transmission time periods, and the duration of second time cycle is 112 OFDM code element transmission time periods.
Data/information 1514 comprises downlink tone block information 1560; The time based structures information 1562; Frequency adjusting power level information 1564; Period 1 is subset saltus step equality information 1566 frequently; Frequently transfer saltus step information 1568 second round; Period 1 is subset index map information 1570 frequently; Time base synchronizing information 1572; Base station cell cell identifier information 1574; Base station sectors identifiers information 1576; Current time information 1578 during reproduction in the based structures; The beacon slot index 1580 in the especially big time slot such as L value for example; Banded symbol index 1582 of the cycle very first time in the beacon slot such as m value for example; One time of k value grade in an imperial examination half period zones shape symbol index 1584 for example; Be the interval frequency subset index of confirming 1586 of the current very first time; The banded code element modulated symbol information 1588 that recovers; Control data 1590 from the period 1 code element; Determined channel estimating 1592; And user data 1594.Downlink tone block information 1560 comprises the information of corresponding to one or more downlink tone block of using in the communication system---downlink tone block that for example has 113 OFDM to transfer frequently---, comprises carrier frequency, this transfers the number that the piece intermediate frequency transfers, frequency that these are transferred frequently or the like frequently.The time based structures information 1562 based structures when comprising the reproduction down link information; Comprise OFDM code element transmission time periods information with the relevant information of marshalling of OFDM code element transmission time periods, for example such as especially big three time cycles of time slot grade in an imperial examination, such as one cycle time of banded symbol time cycle grade in an imperial examination, such as second time cycle such as user data signaling time cycle and such as four time cycles of cycle grade in an imperial examination that keep for beacon signal and the downlink tone block of having a mind to are one of empty.Frequently adjusting power level information 1564 comprises and various types of signals, for example beacon message, banded code element broadcasting control signal, pilot channel, traffic channel user data signal or the like associated base station attachment point transmission power level information.
Period 1 frequency subset saltus step equality information 1566 comprises the information that cycle very first time frequency subset index determination module 1538 for example uses when realizing the saltus step equality for the cycle very first time.Frequently transfer second round saltus step information 1568 to be transferred saltus step module 1554 to be used for during second time cycle, carrying out the downlink tone saltus step frequently.Period 1 frequently subset index map information 1570 comprise the information of table 1000 among Figure 10 for example.
Time base synchronizing information 1572 comprises the information that confirm and that used by module 1528 from module 1526, the synchronous offset information of the beginning of especially big time slot in the based structures when for example allowing wireless terminal about down link.Base station cell cell identifier information 1574 comprise such as with information such as ramp value that just is being associated for its base station attachment point of handling banded code element and/or slope index value.In certain embodiments, the cellular cell identifier information obtains and/or derives from module 1550 and/or module 1556.Base station sectors identifiers information 1576 comprise such as with information such as sector value that just is being associated for its base station attachment point of handling banded code element and/or sectors type value.In certain embodiments, sector identifier information 1576 obtains and/or derives from module 1550 and/or module 1556.Base station cell cell identifier information 1574 is transferred saltus step module 1554 to use by cycle very first time frequency subset index determination module 1538 with frequency with base station sectors identifiers information 1576, for example as controlling input.
Current location during reproduction down link that the current time information 1578 sign base station attachment point transmitters during reproduction in the based structures are just using in the based structures, wherein this wireless terminal synchronously during its down link based structures to recover down link signal.Beacon slot index 1580 in the especially big time slot, for example the integer index value L among the scope 0..17 identifies the current time corresponding to which beacon slot in the especially big time slot.Banded symbol index 1582 of cycle very first time in the beacon slot, for example scope 0 ... the integer value m in 9, the current time identify during corresponding to the cycle very first time this time corresponding to especially big time slot in the banded code element of which index.Banded symbol index 1584 of the cycle very first time; Integer value k for example; Be identified at the index value that is used for banded code element during cycle very first time of especially big time slot, for example k is the integer value among the scope 0..179, the relative position of sign very first time interval in especially big time slot.In certain embodiments, k is generated by very first time periodic key determination module 1536 as the function of value L and m.For the interval frequency subset index of confirming 1586 of the current very first time is drawn by determination module 1538, it is the function of banded symbol index 1584 of base station cell cell identifier 1574, base station sectors identifiers 1576 and the cycle very first time.
The banded code element modulated symbol information 1588 that recovers comprises by modulated symbol recovers the information that module 1542 recovers.For example, for the given banded code element that recovers, the banded code element modulated symbol information 1588 that recovers comprises the information of the modulated symbol that recovers corresponding to one group of 55 or 56 QPSK that is passed on by this band shape code element.The control data 1590 that is used for the period 1 code element is included in during the cycle very first time from the control data/information of transferring the modulated symbol of broadcasting to recover frequently from the non-NULL of the banded code element of base station attachment point.Information 1590 is the output that control data recovers module 1544.Determined channel estimating 1592 is from the output of channel estimation module 1546 and at least in part based on the banded signal that is processed from the cycle very first time.In certain embodiments, channel estimating 1592 is fully based on banded signal message.User data 1366 comprises data/information, for example data/information of during second time cycle, receiving via the modulated symbol of downlink traffic channel segment such as voice, video, audio frequency, text, image, file.
Figure 16 is used for the block diagram that communication equipments such as operational example such as base station use the exemplary communication device of the module of transferring piece to transmit information frequently according to having of various embodiment.The signal that module 1604 is confirmed empty accent frequently, non-NULL is transferred frequently and will during the 3rd time cycle, transmit, and for example on the reproduction basis, send signal.For example, the 3rd time cycle can be this communication equipment just using reproduction the time especially big time slot in the based structures.Module 1604 comprises module 1606,1608,1610,1612,1614,1616,1618,1620 and 1622.
In module 1606, communication equipment confirm in the 3rd time cycle current symbol time corresponding to first, second, still the 4th time cycle.If the current symbol time cycle then operated from module 1606 and advances to module 1608 corresponding to the 4th time cycle.If the current symbol time cycle then operated from module 1606 and advances to module 1614 corresponding to the cycle very first time.If the current symbol time cycle then operated from module 1606 and advances to module 1616 corresponding to second time cycle.
In module 1608, communication equipment determines whether to have dispatched beacon transmissions and transfers in the piece frequently at this and send.If dispatched beacon, then operate from module 1608 and advance to module 1610 corresponding to current symbol time; If do not dispatch beacon, then operate from module 1608 and advance to module 1612 corresponding to current symbol time.In module 1610; During the 4th reproduction time cycle; For example during the time cycle that is beacon signal and two coherent OFDM code element transmission times intervals of transferring the reservation of one of piece sky frequently, the arrowband beacon of every frequency tonal signal energy level that any frequency accent that the communication equipment transmission has than during the second reproduction time cycle, sends is higher is transferred frequently.In module 1612, communication equipment resistance system during the 4th reproduction time cycle is sent the said frequency of entering and is transferred piece.Operation advances to module 1622 from module 1610 or module 1612.
In certain embodiments, the different base stations attachment point uses the 4th different in the 3rd time cycle time cycles for example to pass on the beacon signal as the function of cellular cell and/or sector marker in the communication system.For example, in the embodiment of exemplary three sectors, the 3rd time cycle comprised the 4th time cycle of 24 indexes.For example, sectors type 0 attachment point makes index of reference=0,3, and 6,9,12,15,18,21 the 4th time cycle is passed on beacon signal; And in index=1,2,4,5,7,8,10,11; The resistance system is transferred the transmission of piece frequently about this during 13,14,16,17,19,20,22,23 the 4th time cycle; Sectors type 1 attachment point makes index of reference=1,4, and 7,10,13,16,19,22 the 4th time cycle is passed on beacon signal; And in index=0,2,3,5,6,8,9,11; The resistance system is transferred the transmission of piece frequently about this during 12,14,15,17,18,20,21,23 the 4th time cycle; Sectors type 2 attachment points make index of reference=2,5, and 8,11,14,17,20,23 the 4th time cycle is passed on beacon signal; And in index=0,1,3,4,6,7,9,10; The resistance system is transferred the transmission of piece frequently about this during 12,13,15,16,18,19,21,22 the 4th time cycle.
In module 1614; For the first reproduction time cycle; Banded symbol time cycle of interval duration of OFDM symbol time for example; Communication equipment frequently transfers hopping sequences to confirm above that not the frequency subset of transmitted power and the frequency subset that will send the non-zero modulated symbol above that according to first; The said definite general above that not frequency subset of transmitted power comprises at least 30% of said frequency accent piece intermediate frequency accent, and the said definite frequency subset that will send modulated symbol above that is one of a plurality of predetermined frequency subset that will use.
In certain embodiments; For the cycle very first time given in the 3rd time cycle; Determined empty subset frequently and uniting of non-NULL frequency subset are to be used for a group of base station attachment point to transfer piece to transfer frequently frequently, and the one group of downlink tone block that for example is used for this base station attachment point is transferred frequently.Figure 10 comprises the exemplary frequency subset information corresponding to 97 different empty frequently non-NULLs frequency subset that subset is different with 97.Through utilizing empty mixing of transferring frequently with non-NULL, for example the signal of receiver cycle very first time transmission capable of using such as wireless terminal receiver is carried out channel estimating.In addition, broadcast control information is transmitted by the value of the non-NULL modulated symbol that during the cycle very first time, transmits.
In certain embodiments; Frequency subset corresponding to the cycle very first time given in the 3rd time cycle is as cellular cell, sector marker; And/or transfer piece corresponding to the frequency of the attachment point of communication equipment, confirm with the function of the OFDM symbol time in the timely based structures.For example, there is the different frequency of identical frequency subset to transfer hopping sequences use corresponding to the attachment point that adjoins cellular cell and/or sector.Fig. 9 has described exemplary frequency and has transferred saltus step to confirm.
Operation advances to module 1618 from module 1614.In module 1618, communication equipment is according to generating the OFDM code element from module 1614 determined frequency subset.Operation advances to module 1620 from module 1618.In module 1620, communication equipment sends the OFDM code element that generates from module 1618.Operation advances to module 1222 from module 1220.
In module 1616; Communication equipment is in the second reproduction time cycle; For example be used to pass on during 112 coherent OFDM symbol time intervals of user data; Communication equipment uses said frequency to transfer piece to come transmission information, transmits the non-zero modulated symbol during at least 70% of the said frequency accent of wherein said frequency accent piece is used in said second time cycle.For example, during said second time cycle, except that number control signal, also transmit downlink traffic channel segment signals.In module 1616, in certain embodiments, the different frequency of frequency subset saltus step that logic channel transfers basis and the cycle very first time to be suitable for is frequently transferred the saltus step scheme to jump to physics and is transferred frequently.In some these type of embodiment; Frequency accent saltus step that is suitable for during second time cycle and the frequency subset saltus step both who is suitable for during the cycle very first time utilize cellular cell and/or sector identifier information to confirm saltus step as input, for example frequently transfer saltus step, subset saltus step frequently.For example, same base station section attachment point is used different equalities to saltus step during first and second time cycles.Operation advances to module 1622 from module 1616.
In module 1622, communication equipment upgrades the symbol time index in the 3rd time cycle.For example, in one embodiment, if operation advances to module 1622 by module 1610 or 1622, then index is upgraded by 2 OFDM code element transmission time periods; If operation advances to module 1622 by module 1614, then index is upgraded by 1 OFDM code element transmission time periods; If operation advances to module 1622 by module 1616, then index is upgraded by 112 OFDM code element transmission time periods.In various embodiments, upgrade the calculating of use mould and make that the 3rd time cycle began in succession for next ones such as for example especially big time slots when index was accomplished in the 3rd time cycle.Operation advances to module 1606 from module 1622.
In various embodiments, the duration of the second reproduction time cycle is at least 10 times of duration in the cycle very first time.In certain embodiments, the duration of second time cycle is greater than 50 times of duration in the cycle very first time.In certain embodiments, the duration of second time cycle is greater than 100 times of duration in the cycle very first time.In certain embodiments; Because second time cycle is corresponding to the user data transmission cycle; Therefore the balance between first and second time cycles and in time the location in the based structures of time cycle; The first and the 4th time cycle of transmitting such as user data of no use wherein is to realize not having the significant consideration of interrupting subscriber data traffic from user's viewpoint, is especially for example needing in the application of weak point stand-by period such as voice application etc.In certain embodiments, exemplary the 3rd time cycle is with the 4th time cycle, carrying out the beacon signal that frame synchronization for example etc. is used synchronously the time because the 4th time cycle was used to carry wireless terminal.
In various embodiments, for the cycle very first time, transfer hopping sequences to confirm to use in a plurality of predetermined frequency subset which frequently for first group.The cycle very first time that based structures is given when for example, being used for the reproduction of given base station attachment point first frequently the subset hopping sequences confirm to use the frequency subset information of one of 97 row corresponding to table 1000 among Figure 10.In various embodiments, the different base station attachment points that adjoins uses different cycle very first time frequency subset hopping sequences in the wireless communication system.
In various embodiments; First and second time cycles betided in the 3rd time cycle that on predetermined basis, repeats; OFDM code element transmission time periods in the cycle very first time uses the mould increments index to come index, and the first frequency subset hopping sequences is the function of mould increments index.For example, exemplary especially big time slot can comprise the cycle very first time of 180 indexes, but first frequently transfers hopping sequences in this especially big time slot, to begin repetition on the 98th the cycle very first time.
In various embodiments, the number corresponding at least one predetermined frequency subset in sky frequency subset and the non-NULL frequency subset is a prime number.In the example of Figure 10, this prime number is 97.
In one exemplary embodiment, it is as follows given also to be called as the frequency subset allocation sequence of subset hopping sequences frequently sometimes.
Make f (bssSlopeIndex, bssSectorType, k)=(bssSlopeIndex+1)/((bssSectorType*k+k 2) be illustrated among the banded code element k index with selecteed frequency subset, wherein arithmetic operator (+, 2, *, /) in each all defines in field N, wherein N is a prime number, for example N=97;
The index of bssSlopeIndex=cell slope value, and be identical for each sector of this cellular cell preferably; Adjoin cellular cell and should have different values for bssSlopeIndex; Parameter b ssSlopeIndex equals 0,1 ..., N 1-1, N wherein 1≤N; For example in one embodiment, N 1=96;
The bssSectorType=sector index; For example suppose sectors type T the group 0,1 ..., 5}, 0,1} or 0,1, among the 2}; Adjoining the sector and should have different T values in the given base station;
Function in the f=base station section.
The index of k=strip, k=L*10+m, wherein
Banded symbol index in the m=beacon slot, for example, m be the group 0,1 ..., the value among the 9}.
Beacon slot index in the especially big time slot of L=, for example, the L= group 0,1 ..., the value among the 17}.
Express with slightly different form:
k＝L*10+m；
temp0＝bssSectorType*k+k*k；
temp1＝imod(temp0，N)；
F (bssSlopeIndex, bssSectorType, k)=mod (temp1* (bssSlopeIndex+1), N); Wherein for integer x and m, modular function mod (x, m) be defined as mod (x, m)=x-m*floor (x/m), wherein function f loor (x) is defined as the maximum integer that is less than or equal to x; For integer x and m, if (x*y m) equals 1 to mod, and then (x m) equals y to mould inverse function imod, wherein 1≤y≤m.If (x is 0 m) to mod, and then (x m) is made as 0 to imod.
In various embodiments, first frequently the subset hopping sequences be the function of cellular cell identifier such as ramp value for example.In various embodiments, first frequently to transfer hopping sequences also be the function of sector marker value.
The Figure 17 that comprises the combination of Figure 17 A and Figure 17 B is the block diagram of example wireless terminal that is used for the module at operate wireless terminal according to having of various embodiment.Wireless terminal 1700 comprises module 1704, and wherein wireless terminal receives the beacon signal from base station attachment point transmitter during the 4th time cycle.Operation advances to module 1706 from module 1704.In module 1706, the cellular cell and/or the sector identifier information (1708,1710) of the beacon signal that wireless terminal is confirmed to receive corresponding to the attachment point transmitter from the base station.Operation advances to module 1712 from module 1706.In module 1712, base synchronizing information when wireless terminal uses this beacon signal of receiving to confirm.For example, wireless terminal is confirmed synchronizing information beginning of for example especially big three time cycles of time slot grade in an imperial examination in the based structures when confirming the reproduction down link.Subsequently in the module 1714, wireless terminal uses from module 1714 determined synchronizing informations the down link of wireless terminal to be received and is synchronized to base station attachment point transmitter.Operation advances to module 1716 from module 1714.
In module 1716, wireless terminal receives the down link signal from base station attachment point transmitter on the basis of carrying out.Operation advances to module 1718 from module 1716.In module 1718, wireless terminal confirm in the 3rd time cycle current symbol time corresponding to first, second, still the 3rd time cycle.If the current symbol time in the 3rd time cycle was then operated from module 1718 and is advanced to module 1720 corresponding to the 4th time cycle; If the current symbol time in the 3rd time cycle was then operated from module 1718 and is advanced to module 1722 corresponding to second time cycle; If the current symbol time in the 3rd time cycle was then operated from module 1718 and is advanced to module 1726 via connected node A1724 corresponding to the cycle very first time.
In module 1720, wireless terminal monitors, recovery are also handled beacon signal (if receiving).In certain embodiments, some the 4th time cycles pass on beacon signals and some the 4th time cycles corresponding to by base station attachment point transmitter invalid have a mind to downlink tone block.Operation advances to module 1742 from module 1720.
In module 1722, the wireless terminal recovery is also handled the OFDM code element that comprises user data.Module 1722 comprises module 1723.In module 1723, wireless terminal uses to be transferred the saltus step equality to be used for logic channel transferred frequently frequently to be mapped to physical channel and to transfer frequently, and said frequency transfers the frequency subset hopping sequences equality that uses during saltus step equality and the said cycle very first time different.In various embodiments, the saltus step function of module 1723 uses in cellular cell id information 1408 and the sector ID information 1410 at least one as input.Operation advances to module 1742 from module 1722.
In module 1726, the wireless terminal recovery is also handled banded code element.Module 1726 comprises module 1728,1730,1732,1734,1736 and 1738.In module 1728, wireless terminal is confirmed the very first time periodic key in the 3rd time cycle, for example is worth k1429.Operation advances to module 1730 from module 1728.
In module 1730, wireless terminal is confirmed cycle very first time frequency subset index 1731 as the function of very first time periodic key 1729, determined cellular cell identifier information 1408 and determined sector identifier information 1410 in the 3rd time cycle.For example, in module 1730, can use and the same frequency subset saltus step function of describing about flow chart 1200 and base station 1300 in the past that is used for the cycle very first time.Operation advances to module 1732 from module 1730.In module 1732, wireless terminal uses determined cycle very first time frequency subset index value 1731 and the cycle very first time frequency subset of being stored to index frequency subset map information 1733 definite skies subset and non-NULL frequency subset frequently.In one exemplary embodiment, map information 1733 can comprise the information of table 1000 among Figure 10.Operation advances to module 1734 from module 1732.
In module 1734, wireless terminal recovers the modulation symbol values by the non-NULL subset reception and registration frequently of the banded code element that identifies.Operation advances to module 1736 from module 1734.In module 1736, wireless terminal recovers the broadcast control data by the modulation symbol values reception and registration that is recovered.Operation advances to module 1738 from module 1736.In module 1738, wireless terminal uses base station attachment point transmitter to transfer the knowledge of sending to carry out channel estimating in resistance during the cycle very first time built in the frequency of determined empty subset frequently according to the frequency subset saltus step assigned sequence of this attachment point.In various embodiments, module 1734,1736 carry out with different order with 1738 operation and/or module 1734,1736 and 1738 in one or morely jointly carry out.For example, channel estimating can be recovered prior to broadcast control data.Operation advances to module 1742 from module 1726 via connected node B1740.
In module 1742, wireless terminal upgrades the symbol time index in the 3rd time cycle.The path of depending on step 1742, in certain embodiments, the amount of index upgrade is different.For example; In one exemplary embodiment; The 4th time cycle took 2 coherent OFDM code element transmission time periods, and second time cycle took 112 coherent OFDM code element transmission time periods, and the cycle very first time takies single OFDM code element transmission time periods.The renewal of module 1742 considers that also the period 3 index for example uses mould to operate in for the 3rd time cycle and restart when accomplishing.In certain embodiments, the cycle very first time, frequency subset index value k was reset when for example new the 3rd new time cycles such as especially big time slot begin, and for example was 0.
Operation advances to module 1718 from module 1742, and wherein wireless terminal confirms that the current symbol time index in the 3rd time cycle still was the 4th time cycle corresponding to first, second.
The various modules of describing about Figure 16 and 17 can be combined into module still less.For example, module 1610 and 1612 can be included in the individual module.Further, the various modules of describing about Figure 16 and 17 can be illustrated in the one or more modules among Fig. 2,3,9,13 and 15.
In various embodiments; The banded code element that receives is the OFDM code element corresponding to the transmission OFDM code element of being used the subset transmission frequently of empty frequency subset and non-NULL by base station attachment point transmitter, and said empty subset frequently is at least 30% of a downlink tone block intermediate frequency accent.In some these type of embodiment, non-NULL subset frequently is used to transmit the broadcast control information that points to a plurality of wireless terminals.
In various embodiments; During the second reproduction time cycle; For example have 113 downlink tone block such as downlink tone block of frequently transferring to be used for transmission information, what said downlink tone block was transferred frequently at least 70% transmits the non-zero modulated symbol during being used in for second time cycle.In certain embodiments, the duration of second time cycle is at least 10 times of duration in the cycle very first time.In one exemplary embodiment, the duration in the cycle very first time is that 1 OFDM code element transmission time is interval, and the duration of second time cycle is that 112 OFDM code element transmission times are interval.In certain embodiments, based structures for example makes a plurality of cycles very first time such as 2 or 3 be grouped in together the time.In certain embodiments, based structures makes the predetermined group in the cycle very first time have and the 4th time cycle the time---for example during it, can transmit the 4th time cycle of beacon signal---the identical duration.
The technology of some embodiment can use the combination of software, hardware and/or software and hardware to realize.Some embodiment are to the device of realizing some embodiment, and for example such mobile node, base station, the communication system in terminal moved in image drift.It also to according to the method for some embodiment, for example controls and/or operates mobile node, base station and/or communication system, for example the method for main frame etc.Some embodiment also are used to control the machine readable media of machine realization according to the machine readable instructions of one or more steps of some embodiment, for example ROM, RAM, CD, hard disk etc. to comprising.
One or more modules that the various embodiment nodes of describing in this article are to use the corresponding step of carrying out with some embodiment of one or more methods---for example signal processing, message generate and/or transmitting step---realize.Thus, in certain embodiments, the various characteristics of some embodiment are to use module to realize.These modules can use the combination of software, hardware or software and hardware to realize.Many in said method or the method step are used and are included in such as as being used for controlling and for example having or do not realize all or part of the realizing such as machine-executable instructions such as softwares of the method for above description with the machine of the all-purpose computer of additional hardware etc. at for example one or more nodes in the machine readable media of memory devices such as RAM, floppy disk etc.Correspondingly, some embodiment are to comprising that the machines such as hardware that are used for making processor for example and are associated carry out the machine readable media of one or more machine-executable instructions of each step of above (all) methods of describing.
Although be in the context of ofdm system, to describe, have at least some to be applicable to the communication system of the broad range that comprises many non-OFDM and/or non-cellular system in the method and apparatus of some embodiment.
Numerous distortion that add on the method and apparatus of more above-described embodiment will become obvious after those skilled in the art read the above explanation of some embodiment carefully.This type of distortion is considered to drop within some scope of embodiments.The method and apparatus of some embodiment can and in various embodiments really with CDMA, OFDM (OFDM) and/or various other types can be used for provide the communication technology of the wireless communication link between access node and the mobile node to use.In certain embodiments, access node is implemented as the base station of using OFDM and/or CDMA and mobile node to set up communication link.In various embodiments, mobile node is implemented as notebook, personal digital assistant (PDA) or is used to realize other portable sets that comprise receiver/transmitter circuitry and logic and/or routine of the method for some embodiment.

Claims (15)

1. one kind is used the method for transferring block movement information frequently, and said method comprises:
The sign beacon time cycle;
Sign has the overhead signal periodic expense repetition time periodic groups relevant with the said beacon time cycle;
Sign has the periodic data payload repetition time periodic groups of the data payload relevant with the said beacon time cycle;
Said expense repetition time periodic groups is divided into fixed bit at least uses cycle repetition time son group and flexible bit to use cycle repetition time son group; And
Use cycle repetition time son group and said flexible bit to use cycle repetition time son group to send data to processor or transmitter based on said fixed bit.
2. the method for claim 1 is characterized in that, also comprises:
The fixed bit that generates the first kind is used message;
The fixed bit that generates second type is used message; And
Identify the period 1 of the re-transmitted of the fixed bit use message that is used for the said first kind for transmission; And
Identify the second round of the re-transmitted of the fixed bit use message that is used for said second type for transmission;
Wherein, said fixed bit uses message to have predetermined use.
3. method as claimed in claim 2 is characterized in that, the fixed bit of the said first kind uses message to comprise one of software version, system time, access priority, information on load, carrier wave configuration, sector configuration and through-put power.
4. the method for claim 1 is characterized in that, uses the flexible bit of cycle repetition time son group to use message to comprise other carrier load message about said flexible bit.
5. the method for claim 1 is characterized in that, uses the flexible bit of cycle repetition time son group to use message to comprise other sector load message about said flexible bit.
6. communication equipment comprises:
The memory of stored transmit machine control information;
Be used to use the communication module of transferring block movement information frequently;
Determination module, it is configured to:
The sign beacon time cycle;
Sign has the overhead signal periodic expense repetition time periodic groups relevant with the said beacon time cycle;
Sign has the periodic data payload repetition time periodic groups of the data payload relevant with the said beacon time cycle; And
Said expense repetition time periodic groups is divided into fixed bit uses cycle repetition time son group and flexible bit to use cycle repetition time son group; And
Transmitter is used for during said fixed bit uses cycle repetition time son group and said flexible bit to use cycle repetition time son group, transmitting.
7. communication equipment as claimed in claim 6 is characterized in that, said determination module further is configured to:
The fixed bit that generates the first kind is used message;
The fixed bit that generates second type is used message; And
Identify the period 1 of the re-transmitted of the fixed bit use message that is used for the said first kind for transmission; And
Identify the second round of the re-transmitted of the fixed bit use message that is used for said second type for transmission;
Wherein, said fixed bit uses message to have predetermined use.
8. communication equipment as claimed in claim 7 is characterized in that, the fixed bit of the said first kind uses message to comprise one of software version, system time, access priority, information on load, carrier wave configuration, sector configuration and through-put power.
9. communication equipment as claimed in claim 6 is characterized in that, the flexible bit that uses cycle repetition time to give group about said flexible bit uses message to comprise other carrier load message.
10. communication equipment as claimed in claim 6 is characterized in that, uses the flexible bit of cycle repetition time son group to use message to comprise other sector load message about said flexible bit.
Frequently transfer the communication equipment of block movement information 11. an operation is used to use, said communication equipment comprises:
Be used to identify the device of beacon time cycle;
Be used to identify device with overhead signal periodic expense repetition time periodic groups relevant with the said beacon time cycle;
Be used to identify device with the periodic data payload repetition time periodic groups of data payload relevant with the said beacon time cycle;
Being used for that said expense repetition time periodic groups is divided into fixed bit uses cycle repetition time son group and flexible bit to use the device of cycle repetition time son group; And
Be used for using cycle repetition time son group and said flexible bit to use the device of cycle repetition time son group to processor or transmitter conveys data based on said fixed bit.
12. communication equipment as claimed in claim 11 is characterized in that, also comprises:
The fixed bit that is used to generate the first kind is used the device of message;
The fixed bit that is used to generate second type is used the device of message; And
Be used to the device of the period 1 of transmitting the re-transmitted that identifies the fixed bit use message that is used for the said first kind; And
Be used to the device of the second round of transmitting the re-transmitted that identifies the fixed bit use message that is used for said second type;
Wherein, said fixed bit uses message to have predetermined use.
13. communication equipment as claimed in claim 12 is characterized in that, the fixed bit of the said first kind uses message to comprise one of software version, system time, access priority, information on load, carrier wave configuration, sector configuration and through-put power.
14. communication equipment as claimed in claim 11 is characterized in that, uses the flexible bit of cycle repetition time son group to use message to comprise other carrier load message about said flexible bit.
15. communication equipment as claimed in claim 11 is characterized in that, uses the flexible bit of cycle repetition time son group to use message to comprise other sector load message about said flexible bit.
CN2007800134038A 2006-04-14 2007-04-14 Use of overhead in a wireless communication system Expired - Fee Related CN101461204B (en)

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US79236606P 2006-04-14 2006-04-14
US79229106P 2006-04-14 2006-04-14
US60/792,366 2006-04-14
US60/792,291 2006-04-14
US11/486,653 US8351405B2 (en) 2006-07-14 2006-07-14 Method and apparatus for signaling beacons in a communication system
US11/486,653 2006-07-14
US11/486,602 US7929619B2 (en) 2006-04-14 2006-07-14 Methods and apparatus for using tones in a wireless communication system
US11/486,602 2006-07-14
US11/611,831 US8451914B2 (en) 2006-04-14 2006-12-15 Methods and apparatus for using tones in a wireless communication system
US11/611,831 2006-12-15
PCT/US2007/066676 WO2007121387A2 (en) 2006-04-14 2007-04-14 Use of overhead in a wireless communication system

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