CN1240243C - Frame header for data communication channel - Google Patents
Frame header for data communication channel Download PDFInfo
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- CN1240243C CN1240243C CN01810031.7A CN01810031A CN1240243C CN 1240243 C CN1240243 C CN 1240243C CN 01810031 A CN01810031 A CN 01810031A CN 1240243 C CN1240243 C CN 1240243C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1887—Scheduling and prioritising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0093—Point-to-multipoint
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A data channel for transmitting data from a base station to subscriber stations is provided. Each subscriber station has a different service-class which reflects the reception-quality of the data transmitted from the base station. The data channel is organized into a plurality of frames. Each frame contains service-class information that is packaged in the frame in such a manner that all subscriber stations can recover the service-class information. The frame also includes payload data destined for at least one of the subscriber stations. The payload data is packaged in the frame in such a manner that the subscriber station having payload data destined therefore can recover its payload data, regardless of its service class. Subscriber stations that have no payload data destined therefore, and/or which are in a poorer service-class than the destined subscriber-stations, can use the service-class information to determine that the remainder of the frame can be ignored. An apparatus, system and method relating to the data channel are also provided.
Description
Technical field
Generally speaking, the present invention relates to method and system from the base station transmits data to subscriber station.Particularly, the present invention relates to method and system, and this subscriber station has the ability of the different information that reception sent, and the information of this transmission is packed accordingly from the base station transmits data to subscriber station.
Background technology
Radio communication is just experiencing huge development and growth.Digital radio telephone network based on multiple access technology such as CDMA, FDMA or TDMA can provide high-quality voice communication at present.But when needs were served for a large number of users, these networks can not provide effective data communication, and the expection people have phenomenal growth to the demand that data communication is provided on wireless network.
Such as, be used for the difference of the IS-95 standard of cdma network, the 9.6k baud that can provide or the maximum data rate of 14.4k baud according to selected service.But for the known technology of industry, this speed can not significant adaptation modern data be used usually too slowly, browses and/or file transfer such as WEB.Once in IS-95, attempted to increase maximum data rate.For example, authorize the United States Patent (USP) 5,930,230 of Odenwalder and told about high data rate CDMA wireless communication system, it provides some improvement to IS-95.But the target of Odenwalder is the CDMA environment, and he mainly pays close attention to the transfer of data (being commonly referred to " up link " or " oppositely " channel) from the subscriber station to the base station and does not have to solve the demand (being commonly referred to " down link " or " forward direction " channel) that increases transmission quantity from the base station to the subscriber station.
Another difficulty that the network of IS-95 type exists is the private communication channel between their specific base and the subscriber station, therefore the bandwidth of this dedicated channel can not be used for other user of network, even when not having data to be transmitted between base station and the subscriber unit.Therefore, such as packet network, common this system does not provide the effective use to limited and/or bandwidth for connectionless service, and this is essential when serving a large number of users just.
Authorize the system that the United States Patent (USP) 5,949,814 (Odenwalder#2) of Odenwalder tells about equally and provide the high data rate Supplemental Channel for the CDMA telecommunication system really.In this scheme, transfer system comprises in-phase channel group and quadrature channel group mutually.The in-phase channel group provides the control and the Traffic Channel of one group of quadrature moderate rate, and quadrature phase channel group provides the two-forty Supplemental Channel and the expanded set of the moderate rate channel of quadrature each other.
Although Odenwalder#2 can increase downlink transmission speed, it is not suitable for transmitting data to a plurality of subscriber stations with different this transmittabilities of reception usually.And Odenwalder#2 need carry out some expense control communication between base station and mobile subscriber so that beginning high data rate communication therebetween.This system is not suitable for needing to transmit the system that data are in a small amount given the user as packet communication system, because relative this volume of transmitted data of necessary expense control has caused the relatively poor efficient of system.Similarly, this system is not suitable for the situation that multiple user need carry out transfer of data.
The invention summary
The purpose of this invention is to provide novel method, system and equipment, be used for sending data to one or more subscriber stations from the base station, the shortcoming of at least one prior art above-mentioned is eliminated or has been alleviated in this invention.
According to an aspect of the present invention, it provides the system that transmits data, comprising: base station, the output equipment that described base station has microprocessor, modulator-demodulator and is used for output signal; A plurality of subscriber stations, each subscriber station has microprocessor, modulator-demodulator and input equipment, and each all can be operated to be different from the quality of reception received signal of at least one other described subscriber station; Wherein, described signal comprises frame, described frame has the identifier that can be recovered by all described subscriber stations, described frame also has remainder, this remainder comprises at least one the pay(useful) load bag that is sent to and is recovered by at least one described subscriber station, described identifier indicates the minimum quality of reception, and the arbitrary subscriber station in the described subscriber station that is sent to by a pay(useful) load bag can be operated with this minimum quality of reception and recover described remainder.
According to a further aspect in the invention, it provides the system that is used to send data, comprising: the base station, and described base station has microprocessor, modulator-demodulator, wireless device and antenna; First subscriber station, described first subscriber station has microprocessor, modulator-demodulator, wireless device and antenna, and described first subscriber station can be operated with first quality of reception and receive the radio signal that sends from described base station; At least one additional user station, described additional user station has microprocessor, modulator-demodulator, wireless device and antenna, and the radio signal that receives described transmission with second quality of reception that is different from described first quality of reception can be operated in described at least one additional user station; Described base station, can operate the frame data on the channel are steadily and surely packed, so that received by all described subscriber stations, described frame has can be by the identifier of all described subscriber station recoveries, described frame also has remainder, and this remainder comprises at least one the pay(useful) load bag that is sent out and is recovered by at least one described subscriber station.
In addition, the present invention also provides a kind of subscriber station, comprising: antenna and wireless device combination, and described antenna and radio suite are share in receiving radio signals with certain quality of reception, and described radio signal is carried the frame that sends from the base station; Modulator-demodulator and microprocessor combination, described modulator-demodulator and microprocessor combination are connected to described antenna and wireless transmitting-receiving equipments combination, and can operate to recover identifier from described frame, described identifier indicates the minimum quality of reception, and described microprocessor should be attempted with the remainder of this minimum quality of reception recovery according to the described frame of the described minimum quality of reception or better quality of reception packing.
The present invention further provides a kind of frame of packing so that on the multiple access link, transfer data to the method for at least one subscriber station in a plurality of subscriber stations, each described subscriber station has and the relevant quality of reception of ability that receives transfer of data on described link, and described method comprises step:
Reception and the enough data of buffer memory are filled up described frame;
Described data set is fed at least one the pay(useful) load bag that sends to described at least one subscriber station, and described at least one pay(useful) load bag is steadily and surely packed according to the quality of reception of described at least one subscriber station;
The group of addresses of at least one subscriber station is fed into the head bag, and described head bag is steadily and surely packed according to the quality of reception of described at least one subscriber station at least;
The assembling identifier, it indicates the poor reception quality with these subscriber stations that at least one pay(useful) load bag sends to, no matter described identifier can be recovered by all described quality of reception subscriber stations how;
Described pay(useful) load bag, described head bag and described group identifier are installed in the frame; And,
On described link, transmit described frame.
The present invention also provides a kind of restoration methods that sends to the frame of a plurality of subscriber stations on the multiple access link from the base station, and each described subscriber station has and the relevant quality of reception of described multiple access link, and described method comprises step:
Receive the frame of described transmission;
Use the recovery operation of the minimum quality of reception of corresponding described subscriber station to recover the identifier of frame;
When described identifier indicates the head that the described subscriber station that is receiving recovers frame within the quality of reception scope time, the recovery of described head is to use the recovery operation of the corresponding minimum quality of reception that is indicated by described identifier; And,
Recover the pay(useful) load bag when described head indicates when the pay(useful) load bag is sent to the described subscriber station that is receiving, the recovery of described pay(useful) load bag is to use the recovery operation of the quality of reception of the corresponding described subscriber station that is receiving.
Brief Description Of Drawings
Narration the preferred embodiments of the present invention are by way of example now, with reference to accompanying drawing, wherein:
Fig. 1 is the schematic diagram that includes the network of data channel according to an embodiment of the invention;
Fig. 2 is the schematic diagram of base station shown in Figure 1;
Fig. 3 is the schematic diagram of one of subscriber station shown in Figure 1;
Fig. 4 is the schematic diagram that is used at the frame of transmission over networks shown in Figure 1;
Fig. 5 is the flow chart of the method for assembling according to another embodiment of the invention and the frame that sends Fig. 4; And
Fig. 6 is the flow chart of the method for reception according to another embodiment of the invention and the transmission frame that recovers Fig. 4.
Detailed Description Of The Invention
Referring to Fig. 1, the wireless network that combines the system that transmits data is indicated with 20.Network 20 comprises wireless base station 24 and a plurality of subscriber station 28a, 28b...28n.In a present preferred examples, wireless base station 24 is connected to the data telecommunications network (not shown), such as the switched data network based on the land cable, this connection is by suitable gateway and one or more back haul link (not shown in figure 1), such as T1, T3, E1, E3, OC3 or other suitable land cable link, or satellite or other wireless or microwave channel link, or any other links that are suitable for as back haul link that can expect of other those skilled in the art.
Communicate by letter with subscriber station 28 in base station 24, in the present embodiment, subscriber station 28 be fix and be installed in the user base, as common wireless local loop (WLL) system.Subscriber station quantity " n " can change according to the configuration and the demand of obtainable wireless bandwidth amount and/or subscriber station 28.
The correct abilities that receive the signal that sends to it in base station 24 hereinafter referred to as " quality of reception " of signal, are determined according to different modes according to the multiple access technology of the transmission signal that is adopted.For example, in TDMA or FDMA system, the determined value of normal use is the intensity of the signal that received.In cdma system, the ratio of the bit power of reception and the interference power of reception (is used E usually
s/ N.Express, wherein E
sBe the energy of each symbol, N.Be the interfering energy that receives) ratio be proportional determined value.Under any circumstance, channel 32 can change according to various factors in the quality of reception of each subscriber station 28, comprise that multipath disturbs the distance between (from the existence of nearby buildings etc.), radio noise source (the transmission signal and the radio noise source that comprise other user), geographical feature, subscriber station 28 and the base station 24, the quality of the receiver in the subscriber station 28 etc., such just as understood by those skilled in the art.Different according to distance, signal attenuation is expressed as 1/r usually
N, wherein r is the distance between subscriber station 28 and the base station 24, and N＞1.In the IS-95 cdma system, the representative value of N is 3＜N＜5.
In Fig. 1, according to the quality of reception subscriber station is divided into groups, and express with ring 36 respectively, promptly encircle 36a, 36b...36n respective user station 28a, the quality of reception of 28b...28n.In the drawings, ring 36a, 36b...36n base station 24 is expanded with the concentric circles form and is indicated the distance that is increased from the base station relatively, but encircle 36 and be actually that the quality of reception according to subscriber station 28 defines, therefore subscriber station 28b may be physically than subscriber station 28a more near base station 24, but it is positioned at ring 36b (have than ring 36a the lower quality of reception), and reason is that above-mentioned other influences the factor of the quality of reception, such as near noise source etc.Therefore; Fig. 1 is the logical expression of quality of reception ring 36, and this is conspicuous to those skilled in the art.
In addition, Fig. 1 explanation has a subscriber station 28a on each ring 36,28b...28n, but should be appreciated that in most of actual enforcement of the present invention, each ring 36 may comprise a plurality of subscriber stations 28, the quality of reception in the certain limit of each all promising each ring 36 definition.For example, ring 36a can comprise the subscriber station 28 of the quality of reception greater than 20db, and ring 36b can comprise the subscriber station 28 of the quality of reception between 20db and 10db, and ring 36n can comprise the subscriber station 28 of the quality of reception between-20db and 0db.Like this, the ring 36 between ring 36b and the ring 36n has the quality of reception between 0db and the 10db.Under any circumstance, as shown in Figure 1, subscriber station 28n comes receive channel 32 with the quality of reception lower than subscriber station 28b, and successively, subscriber station 28b comes receive channel 32 with the quality of reception lower than subscriber station 28a, but than subscriber station 28n the better quality of reception is arranged.As below will be in greater detail, be sent to the ring 36 at data based this present place, station of base station 28 and packaged transmission.
Consider in most of actual enforcement, according to as weather and/or by the factors such as local noise of other electronic equipment generation that closes on subscriber station 28, each subscriber station 28 may be changed between different rings 36 at different time.Therefore, reasonable time at interval in or with the form of predetermined incident, each subscriber station 28 will be reported its present qualities of reception to base station 24.The database of the quality of reception of nearest report is safeguarded in base station 24 operations, and according to each being encircled the 36 defined quality of reception scopes subscriber station 28 is divided into groups by ring 36.
The term of Shi Yonging " bag " " packing " " packing " refers to send the whole arrangement of the data of packing to its purpose reception ground herein.Packing is drawn together but is not limited to data: forward error correction (FEC) sign indicating number (never being encoded to high-level coding and/or different coding methods) of using different stage, adopt different transfer rates, adopt different modulation system (QPSK, QAM4, QAM16, QAM64 etc.) and other any technology and method come to transmit according to the arranging datas such as probability of quantity, data rate and the transmission error of required wireless (or other physical layer) resource of selecting.For example, packet can be modulated to pack and send to first purpose recipient with 1/4 coding and OAM64, and another packet can be modulated to pack and send to second better purpose recipient of the quality of reception with 1/2 coding and QAM256.
Fig. 2 shows base station 24 in more detail.Base station 24 comprises antenna 40, or a plurality of antenna, is used for receiving on communication channel 32 and sending wireless communication signals.Successively, antenna 4O is connected to wireless device 44 and modulator-demodulator 48.Modulator-demodulator 48 is connected to microprocessor-router combination 52.A kind of suitable microprocessor is the SPARC processor system that SUNMicrosystems company makes.Should be appreciated that combination 52 can comprise a plurality of microprocessors as required.Router in microprocessor-router combination 52 is connected to back haul link 56 with any suitable mode, and and then base station 24 is connected to the packet-switched data network (not shown).
Referring to Fig. 3, subscriber station 28 is illustrated in more detail.Subscriber station 28 comprises antenna 60, or a plurality of antenna, is used for receiving on communication channel 32 and sending wireless communication signals.Successively, antenna 60 is connected to wireless device 64 and modulator-demodulator 68, and modulator-demodulator 68 is connected to microprocessor combination 72.
Microprocessor makes up 72 and can comprise, for example, the StrongARM processor that Intel makes, it carries out various functions, comprises carrying out the A/D-D/A conversion filter, encoder, decoder, data compressor, data decompressor and/or bag decomposer.As shown in Figure 3, microprocessor combination 72 connects modulator-demodulator 68 and FPDP 76, the latter is used for subscriber station 28 is connected to certain smart machine, and such as personal computer, personal digital assistant etc., described smart machine can be operated and handle the data that receive from communication channel 32.Therefore, microprocessor combination 72 can be operated the data that are used between deal with data port 76 and the modulator-demodulator 68.
Referring to Fig. 4, the frame that sends on channel 32 is represented with 100.In this preferred embodiment, frame 100 is selected to require 10 milliseconds delivery time, although to frame 100 and Yan Gengchang or shorter delivery time also can be selected, if necessary.Such as understood by a person skilled in the art, frame 100 can be measured by the duration.Supply to send and in this duration, can carry the symbol of giving determined number.But and these symbol representative datas, the actual amount of data of symbology depends on that data are packaged into the mode of symbol, usually packs with the modulation and the combination of encoding.Therefore, although preferably the character rate of the duration of frame and frame remains unchanged, the effective data rate that sends in frame is according to the difference of packing data and difference.These notions will be discussed below in more detail in application of the present invention.
Different with pay(useful) load bag 112, target ring field 116 and frame length field 120 always are packaged in the ring bag 104 in sane mode, guaranteeing when frame 100 is sent on channel 32, can be by all subscriber station 28a, and the 28b...28n recovery.Each subscriber station 28 that this sane packing allows base station 24 to be served can both recover field 116 and 120.In this example, the robustness of ring bag 104 reaches with following mode: field 116 and 120 process forward error correction (FEC) operation 124 and modulation operations 128, and then be inserted into ring bag 104.The type of forward error correction (FEC) operation 124 and modulation operations 128 is selected according to the needs of the subscriber station 28n that the is positioned at ring 36n subscriber station 28 of poor reception quality (promptly have).
For example, if channel 32 adopts CDMA multiple access technology, in this preferred embodiment, subscriber station 28n has the E of 3db level
s/ I
o, so suitable forward error correction operation 124 is ratio 1/2 codings, and modulation operations 128 is 4-QAM (QPSK).Suitable combination forward error correction operation 124 and modulation operations 128 will help not only and/or guarantee that ring bag 104 is recovered by subscriber station 28n, and other subscriber station also can recover ring bag 104.Suitable forward error correction operation 124 and modulation operations 128 to the given subscriber station 28n with given quality of reception can be expected by those skilled in the art.
Table I in appendix I is for example understood in cdma system according to the situation of the SNR that changes to frame 100 packings.Hurdle 1, label are Ec/No, are the SNR measured values, indicate the energy of each given noise level other every (chip) of given subscriber station 28 experience.Hurdle 2, label are spreading factors, indicate position (chip) quantity of each symbol.Hurdle 3, label are modulation symbols, and indication is used for the modulation operations of packing data.Hurdle 4, label are the bit/symbol of coding, the amount of bits of indication each symbol after through the modulation operations on hurdle 3.Hurdle 5, label are encoding rates, the encoding operation that indication is used in packing data.Hurdle 6, label is-symbol repetition factor, the factor that designated symbol is repeated, being used for further packs to data realizes sane recovery.Hurdle 7, label are bit/symbol, indicate the significant bit number of each symbol.Hurdle 8, label are bit/frame, indicate the significant bit quantity of every frame, and prerequisite is that all bits in the frame are all according to the packing of modulation rate, encoding rate and use with delegation's symbols displayed repetition factor.Hurdle 9, label are Es/No, are the SNR measured values, indicate the energy of each given other each symbol of noise level of given subscriber station 28 experience.Hurdle 10, label are Eb/No, are the SNR measured values, indicate the energy of each given other each bit of noise level.It should be appreciated by those skilled in the art that hurdle 1, hurdle 9 and hurdle 10 have fixing relation each other.
Therefore, at present preferred encoding operation 124 (referring to hurdle 5 and hurdle 6) and modulation operations 128 (referring to hurdle 3) are illustrated in Table I.But, pack target ring field 116 and frame length field 120 to ring bag 104 with other suitable sane method, and/or the combination of these methods, will be conspicuous for those skilled in the art at present.
The length of each address data field 136 is 12 bits in present preferred embodiment, the length of each formatted data field 140 is 4 bits, the length of each length data field 144 is 12 bits, and the length of crc field 148 is 8 bits, and the length that empties bit 152 is 8 bits.But, can adopt other length to adapt to specific demand, this can be expected by those skilled in the art.
Identifier bag 132, CRC bag 148 and empty bit 152 and all wrap 108 to the end with suitable sane method packing is to guarantee being positioned at base station 24 and all subscriber stations between the ring of target ring field 116 (comprising) indication 28 recover.In other words, if target ring field 116 indicating ring 36b, the packaged contents of head bag 108 can be by at ring 36a so, the recovery that all subscriber stations of 36b 28 are sane, but the station 28n on ring 36n can not receive head bag 108.
In the present embodiment, the sane packing of correct bag 108 realizes with following mode: bag 132, CRC bag 148 and empty and form head after bit 152 experience encoding operations 158 and the modulation operations 162 and wrap 108.The selection of forward coding operation 158 and modulation operations 162 is based on by the subscriber station on the ring that is positioned at target ring field 116 signs and recovers the head bag 108 needed qualities of reception.At present preferred encoding operation 158 is ratio 1/3 convolutional encodings, and modulation operations 162 is QAM of M level, and wherein M can be 4,16,64 or 256.
Suitably select the combination of encoding operation 158 and modulation operations 162 will help not only and/or guarantee that head bag 108 is recovered by the subscriber station on the ring of target ring field 116 signs 28, and the subscriber station 28 between this ring and base station 24 also can recover head bag 108.In addition, present optimized encoding operation 124 (referring to hurdle 5 and hurdles 6) and modulation operations 128 (referring to hurdle 3) are illustrated in Table I.But, other suitable encoding operation 158, modulation operations 162, and/or other bag 132, CRC bag 148 and empty bit 152 packings and wrap 108 sane mode to the end, and/or the combination of these modes can be expected by those skilled in the art.
Each pay(useful) load bag 112 is by one or more packets 166 and empty bit 170 and form.The destination of each pay(useful) load bag 112 is the one or more subscriber stations 28 that are positioned between the specified ring (comprising) of base station 24 and target ring bag 116.Packet 166 can be the data of any kind of base station 24 receptions.For example, packet 166 can be the TCP/IP bag, and it is required to send IP and wraps subscriber station 28.Packet 166 can specifically be indicated sends to specific subscriber station 28a, and 28b...28n, each subscriber station have absolute address and/or the one or more broadcast address that is defined of oneself.
Each packet 166 and corresponding group thereof empty bit 170, are packaged into corresponding pay(useful) load bag 1121,1122...112x.Packing is according to carrying out in sane mode at the format fields 140 specified forms of corresponding pay(useful) load bag 112.This packing helps and/or guarantees to be recovered by purpose subscriber station 28.(accidental, other subscriber station 28 between base station 24 and purpose subscriber station 28 places ring also can recover pay(useful) load bag 112, but generally, these recoveries can not be performed, and can also adopt suitable safety measure to prevent eavesdropping).For example, be defined as the target ring field 166 that sends to ring 36n if frame 100 comprises, and comprise the pay(useful) load bag 112 that the destination is subscriber station 28b, pay(useful) load bag 112 will be packaged into and can be recovered by subscriber station 28a and 28b so.Operation 174 of the forward coding of appointment and modulation operations 178 are selected based on the quality of reception that is positioned at corresponding to the subscriber station 28b on the specified ring 36b of the address data field 136 of this pay(useful) load bag 112.At present preferred encoding operation 174 is ratio-N convolutional encoding (N is the real number greater than 0), modulation operations 178 be the M level (wherein M can be 4 with M, 16,64 or 256), wherein select suitable N and M according to the quality of reception on the indicated ring 36 of format fields 140.
From in general, should consider that encoding operation 174 and/or modulation operations 178 and/or other sane packing manner can select together or respectively for each the pay(useful) load bag 112 in the single frame 100.For example, when the subscriber station 28 in specific ring 36 has the quality of reception of wide region, then can use identical modulation operations 178, but be to use different encoding operation 174 to adapt to the scope of the quality of reception on the ring 36 each subscriber station 28 that is positioned on that specific ring 36.
For each pay(useful) load bag in the frame 100 112 is selected encoding operation 174 and/or modulation operations 178 and/or other sane packing manner can be dependent on practical application and/or the type of data carried by data on channel 32.(because application and/or data type have different demands in order to reach required bag error probability.) for example, voice (VOIP) connection that file transfer protocol (FTP) (ftp) is compared on IP has lower tolerance.Therefore the pay(useful) load bag 112 that sends to first subscriber station 28 on the ring 36b can be according to 1/4 convolutional encoding, and sends to the pay(useful) load bag 112 of another subscriber station 28 on the ring 36b, connects but be used for VOIP, then can be according to 1/2 convolutional encoding.
When encoding operation 174 and 178 pairs of target rings 116 of modulation operations, for example encircle 36b, when being general, the destination is that the pay(useful) load bag 112 of the subscriber station 32 in the more high-rise ring (promptly encircling 36a) also can be included in (if necessary) in the frame 100, although these destinations are that the pay(useful) load bag 112 of more high-rise ring 36 will be packaged in unnecessary sane other mode of level according to relative its destination, this is conspicuous to those skilled in the art.
At present preferred encoding operation 124 (referring to hurdle 5 and hurdle 6) and modulation operations 128 (referring to hurdle 3) are illustrated in Table I.But, other suitable encoding operation 174, modulation operations 178, and/or other packet 166 and empty the sane mode that bit 170 is bundled to each pay(useful) load bag 112, and/or the combination of these modes can be expected by those skilled in the art.
With reference to figure 5, it shows a kind of method that sends data according to an embodiment of the invention.In order to help to explain this method, please refer to network 20 and frame 100.In step 200, packet 166 is received by base station 24, so that send to one or more subscriber stations 28, and buffer memory is received so that fill up frame 100 up to the data that sufficient amount is arranged.In this example, packet 166 24 is received in the base station, can send to the subscriber station 28 of the packet of base station 24 from back haul link 56 or from other, and microprocessor-router makes up 52 buffered data packet 166 so that be assembled into subsequently in the frame 100.The data volume size of enough filling up frame 100 depends on selected encoding operation 158 and 174 and selected modulation operations 162 and 178, and this is conspicuous to those skilled in the art.Therefore, suppose that best (being maximum valid data ratio) encodes and modulation operations is maybe worked as from receiving packet 166 the earliest, in advance under the overdue situation of the time limit of Xuan Zeing, determine to receive the data of sufficient amount, adopted the parameter of back to guarantee frame 100 assembled and transmission before the selected maximum delay period is exceeded.Any because the coding and/or the lower data rate factor of modulation operations and can not be placed to that data that received in the frame 100 that assembles are cushioned and be assembled into the frame 100 that the next one will be assembled in the process of expection.
When the data that receive sufficient amount are come infilled frame 100, determine to comprise the ring with minimum quality of reception 36 of subscriber station 28 in step 204, the packet of at least one reception be sent to this station, family 28.Step 204 is made up 52 performed by microprocessor-router, it checks the destination address of the packet 166 of each reception to determine to have ring 36 to the base station 24 minimum qualities of reception, and the subscriber station 28 on this ring is destinations of at least one packet 166.
At step 208 pay(useful) load bag 112 assembled and insertion frames 100.Suitable encoding operation 174 and modulation operations 178 are applied to the packet 166 that received, and the suitable bit 170 that empties is added, and its result is inserted into one or more pay(useful) load bags 112.Plan to be grouped, be used to insert one or more general pay(useful) loads 112 for the packet 166 that same subscriber station 28 uses.
According to the ring of determining in step 204 36 (promptly, if ring 36a is determined ring, 256QAM just is used for all bags, if perhaps ring 36b is determined ring, 64QAM just is used for all bags), modulation operations 178 can be selected for all bags of handling 166, perhaps, as discussed earlier, also can consider to change and be used for the modulation operations that pack processing adopted, each bag can have different modulation operations if necessary.In a similar fashion, according to the ring of determining in step 204 36 (promptly, if ring 36a is determined ring, ratio 1/2 coding just is used for all bags, if perhaps ring 36b is determined ring, ratio 1/4 coding just is used for all bags), can select encoding operation 174 for the bag 166 of all processing, perhaps, as discussed earlier, also can consider to change and be used for the encoding operation that pack processing adopted, each bag can have different encoding operation if necessary.What consider at present is to select single modulation operations 178 for all bags 166 in the frame 100, but encoding operation 174 will change according to the different quality of reception of the subscriber station 28 on the ring 36 and/or bag error probability ratio as requested.
In case pay(useful) load 112 is assembled, in step 212, head bag 108 just is assembled into frame 100.Head bag 108 is with assembling as discussed earlier, and the corresponding targeted customer of each pay(useful) load bag 112 stands and 28 is inserted into each address field 136 thus; The corresponding form of each pay(useful) load bag 112 (promptly modulate and/or encode) is inserted into format fields 140; The corresponding length of each pay(useful) load bag 112 is inserted into each length field 144.At last, produce the CRC coding according to identifier bag 132, it is inserted into crc field 148.Add then and decide bit 152 clearly, at this moment, field 132 and 148 and empty bit 152 and be encoded according to encoding operation 158, modulated according to modulation operations 162.Select encoding operation 158 and modulation operations 162, to guarantee that the sane packing of head bag 108 is to satisfy the quality of reception of all subscriber stations 28 on the ring 36 that step 204 is determined.
Then, at step 216 assembling ring bag 104.The outermost target ring of determining in step 204 36 is inserted into target ring field 116, and frame length according to the quantity of pay(useful) load bag ' X ', is inserted into frame length field 120. Field 116 and 120 is finished forward error correction with operation 124 then, finishes modulation with modulation operations 128, is inserted into ring bag 104 then.Selection operation 124 and 128 is to guarantee the high level probability of acceptance of the sane packing of ring bag 104 with all subscriber stations 28 of satisfying base station 24 and being served.
Then, in step 220, now till the frame 100 of assembling be sent to subscriber station 28a, 28b...28n by channel 32.This transmission can use known technology to exist in common mode.
To those skilled in the art, should be appreciated that and not depart under the situation of the present invention the said method correct.For example, if for the ring of determining in step 204 36 that sets the goal of giving is selected modulation operations 178 and encoding operation 174 in advance, the data volume of determining to fill up frame 100 required receptions so is exactly a simple question, and can be determined when receiving each packet 166.In this case, execution in step 204 when each bag 166 is received, thereby the definite minimum quality of reception ring 36 of all bags for receiving till that time.Calibrate the packet 166 that is received according to defined modulation and encoding operation, the size of data of its consequent calibration is compared with the selected largest amount of frame 100.
If the size of determined largest frames, if during the perhaps defined maximum latency, there is not to surpass the bag that the next one received 166 that is verified, so minimum quality of reception ring 36 just is updated, if necessary, just need carry out scale operation again and also check its size (and/or time of delay) once more.
With reference to Fig. 6, show the method that a kind of frame 100 that is used for being sent according to an embodiment of the invention is recovered by subscriber station 28.In step 300, frame 100 is received by subscriber station 28.Wireless device 64 received frames 100, and be transferred to modulator-demodulator 68.
In step 304, recover target ring bag 104.In the present embodiment, this is finished by modulator-demodulator 68 and microprocessor combination 72, and modulator-demodulator 68 uses the demodulation operation opposite with modulation operations 128, and microprocessor combination 72 uses are operated 124 opposite decode operations with forward error correction.In the present embodiment, demodulation operation and decode operation all define for all subscriber stations 28 in advance, even and be defined as allowing also recovering to encircle bag 104 in the network 20 under the minimum quality of reception.After ring bag 104 is resumed, target ring field 116 and frame length field 120 just can by microprocessor make up 72 obtain to help further processed frame 100, as described in following.
In step 308, determine subscriber station 28 whether within by the target ring 36 of target ring field 116 indications or on (being the quality of reception that the quality of reception of subscriber station 28 equals the ring of target ring field 116 appointments at least).If be lower than global section 116 indicated ring of target in the definite quality of reception that is just receiving the subscriber station 28 of information of step 308, this method will be abandoned this frame and return step 300 and receive and handle next frame 100 in step 312 so.
But, if equal global section 116 indicated ring 36 of target at least in the definite quality of reception that is just receiving the subscriber station 28 of information of step 308, one or more pay(useful) load bags 112 in frame 100 just are sent to this subscriber station 28 so, and our rule advances to step 316.
In step 316, recover target head bag 108.In the present embodiment, this is finished by modulator-demodulator 68 and microprocessor combination 72, and modulator-demodulator 68 uses the demodulation operation opposite with modulation operations 162, the decode operation that microprocessor combination 72 uses and encoding operation 158 are opposite.In the present embodiment, suitable demodulation operation and/or decode operation can be determined based on the information that the target ring 116 that recovers in step 304 comprise, or are selected in advance and fix at network 20.These operating provisions are for allowing on the ring 36 by 116 indications of target ring field, even the subscriber station of the minimum quality of reception 28 also has very high success rate to recover head bag 108.
This method advances to step 320, and whether the head bag 108 that definite therein 148 pairs of CRC bags that from the beginning wrap recovery in 108 are recovered is effective.If the head bag that CRC bag 148 is recovered 108 invalid (promptly having taken place to receive wrong), the subscriber station 28 that is so receiving just determines that it does not have correct recovery head bag 108, and this method advances to step 324 and carries out abnormality processing.Can use any abnormality processing agreement, this can be expected by those skilled in the art, comprises sending NACK or not taking clear and definite abnormality processing action.
If the CRC that recovers in step 320 is effectively, the subscriber station 28 that is so receiving has just been determined its correct recovery head bag 108, this method advances to step 328.In step 328, the pay(useful) load bag 112 that sends to the subscriber station 28 that is receiving is resumed.Microprocessor combination 72 is with reference to each identifier bag 132
1... 132
xSo that determine which pay(useful) load bag 112
1, 112
2... 112
xBe sent to the subscriber station 28 that is receiving.Utilize the demodulation operation opposite with modulation operations 178, and in that bag 132 format fields 140 is instructed to or the decode operation that can be in network 20 predefined and encoding operation 174 be opposite, these pay(useful) load bags 112 that are sent to the subscriber station 28 that is receiving are by recovery from frame 100.
This method is returned step 300 and is handled the next frame 100 that receives then.
Should consider that the present invention is particularly suitable for carrying conferencing data, no matter be voice or video, because the one or more pay(useful) load bags 112 in frame 100 can be by one group of subscriber station 28 addressing of conference participation and recovery (sharp as, by comprising the address information that indicates all subscriber stations 28 that should recover pay(useful) load 112 in calling).This pay(useful) load bag 112 can comprise conferencing data.Now obviously, data can be by sane packing, to guarantee that allowing has some acceptable pay(useful) load 112 to lose to the subscriber station with lower level quality of reception by the subscriber station recovery at certain medium quality of reception layer, guarantee that still the subscriber station with high-rise quality of reception can recover.In addition, a meeting of one group of subscriber station 28 can be only calling out for conference participation of channel 32 is set up.
Although embodiment discussed herein has described the example of determining of enforcement of the present invention, should be appreciated that the combination of this example, subclass and variation are all within the scope of the present invention.For example, the packet 166 that receives or receive by other subscriber station 28 by back haul link 56 can be cached to base station 24 with any required form component frame, such as according to ring 36a, and the 36b...36n grouping.
24 data cached bags 166 can also allow to select the size (i.e. symbol quantity in the given frame that pre-determines time span) of frame in the base station, because actual needs is assembled the modulation of each bag in the frame and/or the quantity of coding and/or forward error correction can be selected as required.
Being to be further noted that in network 20 to provide additional channel, if necessary.For example, a channel can be exclusively used in one group of ring 36a...36c, and second channel can be exclusively used in ring 36d...36n.In addition, or selectable, and additional channel can also be encrypted and improve safety of transmission on network 20.
Can increase additional channel be contained in have in the network 20 upgrade than other subscriber station and/or the subscriber station of wireless device faster.Upgrade in this embodiment ,/subscriber station 28 can be a backward compatibility faster, with ability that comprises the older channel of reception and the ability that receives additional channel.
The delay that provides additional channel just to be used for improving network 20 is provided, increases the total throughout of the data from the base station to the subscriber station thus.In addition, can carry out that 24 buffer memorys come administrative delay with the service quality relevant with it according to data type (QoS) demand in the base station.For example, can come buffer memory and transmission when the possibility with unlimited relatively delay, then on the basis of priority, be sent out with the data of VOIP join dependency, so that delay is reduced to the low-level of this connection requirement with the movable relevant data of web browser.
Should be understood that this network can be divided into many service class (or ring) and the one or more sub-services ranks (or subring) in each service class.In this case, can be used for each service class for the modulation of deciding grade and level, can be used for each service class for the error correction of deciding grade and level.
Although embodiment discussed herein uses the combination of coding and modulation to come to realize the part of frame and/or frame is steadily and surely packed according to the quality of reception of the different needs at different user station, expect and to adopt any sane packaging method as required.
Should consider that can make ins all sorts of ways and be identified for sane packing form that the bag in the frame 100 is packed (promptly modulate and/or encode).For example, each subscriber station 28 can report that its quality of reception to base station 24 is (perhaps as definite measured value, perhaps by indicating subscriber station 28 present resident rings (36).Successively, pay(useful) load bag 112 can be packaged according to predetermined form (promptly encode and/or modulate), and according to the quality of reception of being reported, this form all is known to base station 24 and subscriber station 28.By this way, base station 28 does not need to provide format fields 140 for each subscriber station 28, and reason is that subscriber station 28 can be according to the predetermined form relevant pay(useful) load bag 112 of only decoding.In the situation in front, therefore obviously can eliminate format fields 140.
In addition, format fields 140 can be included in the frame 110, the latter is also contained control bit, and to indicate the pay(useful) load 112 that is sent to given subscriber station 28 packaged according to the predetermined form based on the quality of reception of subscriber station 28, and perhaps this control bit can indicate pay(useful) load 112 according to some other form packing that is indicated by the subsequent bits in format fields 140.
It should further be appreciated that format fields 140 can be eliminated, reason is that the subscriber station 28 that the form of sane packing can received uses " blind detection " to determine, the subscriber station 28 that is promptly receiving can only be attempted coming pay(useful) load bag 112 is decoded with various levels of demodulation sign indicating number, up to packet 116 by significant recovery.Other combination of selection and detection robust packetization types and variation are conspicuous to those skilled in the art.
Although embodiment discussed herein pays close attention to the multiple access (rdma) scheme of implementing on wireless network, but should be appreciated that the present invention can be applied to various multiple access (rdma) schemes, such as on twisted-pair feeder or coaxial link, and can make and in all sorts of ways, such as TDMA, FDMA or CDMA.
The invention provides data channel novel in the network, this network has a base station and a plurality of subscriber station at least.This data channel can be made up of a plurality of frames, and described frame has at least one bag to be read by all subscriber stations, and this bag indicates whether the subscriber station that is receiving is the destination address of all or part of information of frame.This frame and/or its part be steadily and surely packing in any suitable manner, guarantee and/or help the destination address subscriber station can recover to send to any data of this subscriber station, and the subscriber station outside the destination address can determine that they there is no need to recover to be included in all or part of data in the frame.Just the part of frame or frame is steadily and surely packed by different quality of reception demands according to the different user station, the sane packing of lower complexity can be used to have the station of low quality of reception demand, thereby more data is advanced in packing in each frame, by more sane mode frame is packed and guarantees that this network can reach the scope of the subscriber station with higher quality of reception demand.
The purpose of above-mentioned embodiments of the invention is as example of the present invention, and those skilled in the art can make change to it and revise not departing from the invention scope that defines in the claims.
Appendix I
Table I
| Ec/No (dB) | Spreading factor (position (chip)/symbol) | Modulation symbol | The bit/symbol of coding | Encoding rate | The symbol repetition factor | Bit/symbol | Bit/frame | The Es/No (dB) that is used for 10^-3 FER | Eb/No (dB) |
| -9.06 -8.61 -8.31 -7.68 -7.26 -7.01 -6.51 -5.76 -5.01 -4.51 -4.26 -4.01 -3.51 -2.76 -2.01 -1.51 -0.51 1.49 4.49 4.99 5.74 6.99 8.74 12.99 15.24 16.99 17.99 20.49 | 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 | 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 16 16 16 16 16 64 64 256 256 256 | 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 4 4 4 4 4 6 6 8 8 8 | 0.328 0.367 0.392 0.435 0.328 0.357 0.392 0.435 0.468 0.556 0.328 0.357 0.392 0.435 0.468 0.556 0.646 0.770 0.435 0.488 0.556 0.648 0.770 0.646 0.770 0.556 0.646 0.770 | 3 3 3 3 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 | 0.22 0.24 0.26 0.29 0.33 0.36 0.39 0.44 0.49 0.56 0.66 0.71 0.78 0.87 0.98 1.11 1.28 1.54 1.74 1.95 2.22 2.58 3.08 3.88 4.62 4.45 5.17 6.16 | 4196.4 4589.6 5017.6 5568 6297.6 6854.4 7526.4 8352 9369.6 10675.2 12595.2 13708.8 15052.8 16704 18739.2 21350.4 24806.4 29568 33408 37476.4 42700.8 49612.8 69135 74419.2 88704 85401.6 99225.6 118272 | -6.05 -5.8 -5.3 -4.65 -4.25 -4 -3.5 -2.75 -2 -1.5 -1.25 -1 -0.5 0.25 1 1.5 2.5 4.5 7.5 8 5.75 10 11.75 16 16.25 20 21 23.5 | 0.55 0.43 0.53 0.83 0.59 0.47 0.57 0.67 1.12 1.05 0.58 0.46 0.56 0.65 1.11 1.04 1.39 2.62 5.09 5.10 5.25 5.86 6.86 10.12 11.60 13.52 13.67 15.60 |
Claims (23)
1. be used to transmit the system of data, comprise:
The base station, the output equipment that described base station has microprocessor, modulator-demodulator and is used for output signal;
A plurality of subscriber stations, each subscriber station has microprocessor, modulator-demodulator and input equipment, and each all can be operated to be different from the quality of reception received signal of at least one other described subscriber station;
Wherein, described signal comprises frame, described frame has the identifier that can be recovered by all described subscriber stations, described frame also has remainder, this remainder comprises at least one the pay(useful) load bag that is sent to and is recovered by at least one described subscriber station, described identifier indicates the minimum quality of reception, and the arbitrary subscriber station in the described subscriber station that is sent to by a pay(useful) load bag can be operated with this minimum quality of reception and recover described remainder.
2. system according to claim 1, wherein said output equipment is a wireless device, and described input equipment is a wireless device, and described signal is to adopt wireless data transmission.
3. system according to claim 1, wherein said signal transmits on CDMA Channel.
4. system according to claim 1, wherein said remainder comprises the head with address information, described head can be recovered by described subscriber station, but the described remainder of described subscriber station operation recovery, described remainder further comprises at least one pay(useful) load bag, and described pay(useful) load bag is recovered by the subscriber station of the described address information of correspondence.
5. system according to claim 4, wherein said pay(useful) load bag is packaged according to the quality of reception of destination address subscriber station.
6. system according to claim 1, the wherein said quality of reception are the measurements of signal to noise ratio.
7. system according to claim 1, wherein said identifier uses modulation operations to be packaged into described frame.
8. system according to claim 1, wherein said identifier uses encoding operation to be packaged into described frame.
9. system according to claim 1, wherein said remainder uses modulation operations to be packaged into described frame.
10. system according to claim 1, wherein said remainder uses the combination of encoding operation and modulation operations to be packaged into described frame.
11. system according to claim 10, wherein said encoding operation is a ratio 1/N convolutional encoding.
12. system according to claim 10, wherein said modulation operations are M level QAM.
13. according to the described system of claim 1, wherein said remainder uses encoding operation to be packaged into described frame.
14. be used to send the system of data, comprise:
The base station, described base station has microprocessor, modulator-demodulator, wireless device and antenna;
First subscriber station, described first subscriber station has microprocessor, modulator-demodulator, wireless device and antenna, and described first subscriber station can be operated with first quality of reception and receive the radio signal that sends from described base station;
At least one additional user station, described additional user station has microprocessor, modulator-demodulator, wireless device and antenna, and the radio signal that receives described transmission with second quality of reception that is different from described first quality of reception can be operated in described at least one additional user station;
Described base station, can operate the frame data on the channel are steadily and surely packed, so that received by all described subscriber stations, described frame has can be by the identifier of all described subscriber station recoveries, described frame also has remainder, and this remainder comprises at least one the pay(useful) load bag that is sent out and is recovered by at least one described subscriber station.
15. subscriber station comprises:
Antenna and wireless device combination, described antenna and radio suite are share in receiving radio signals with certain quality of reception, and described radio signal is carried the frame that sends from the base station;
Modulator-demodulator and microprocessor combination, described modulator-demodulator and microprocessor combination are connected to described antenna and wireless transmitting-receiving equipments combination, and can operate to recover identifier from described frame, described identifier indicates the minimum quality of reception, and described microprocessor should be attempted with the remainder of this minimum quality of reception recovery according to the described frame of the described minimum quality of reception or better quality of reception packing.
16. the frame of packing is so that transfer data to the method for at least one subscriber station in a plurality of subscriber stations on the multiple access link, each described subscriber station has and the relevant quality of reception of ability that receives transfer of data on described link, and described method comprises step:
Reception and the enough data of buffer memory are filled up described frame;
Described data set is fed at least one the pay(useful) load bag that sends to described at least one subscriber station, and described at least one pay(useful) load bag is steadily and surely packed according to the quality of reception of described at least one subscriber station;
The group of addresses of at least one subscriber station is fed into the head bag, and described head bag is steadily and surely packed according to the quality of reception of described at least one subscriber station at least;
The assembling identifier, it indicates the poor reception quality with these subscriber stations that at least one pay(useful) load bag sends to, no matter described identifier can be recovered by all described quality of reception subscriber stations how;
Described pay(useful) load bag, described head bag and described group identifier are installed in the frame; And,
On described link, transmit described frame.
17. method according to claim 16 further comprises the steps, before described transfer step, format information is assembled into described head bag, described format information indicates described at least one pay(useful) load bag and how steadily and surely to be packed.
18. a restoration methods that sends to the frame of a plurality of subscriber stations on the multiple access link from the base station, each described subscriber station have and the relevant quality of reception of described multiple access link, described method comprises step:
Receive the frame of described transmission;
Use the recovery operation of the minimum quality of reception of corresponding described subscriber station to recover the identifier of frame;
When described identifier indicates the head that the described subscriber station that is receiving recovers frame within the quality of reception scope time, the recovery of described head is to use the recovery operation of the corresponding minimum quality of reception that is indicated by described identifier; And,
Recover the pay(useful) load bag when described head indicates when the pay(useful) load bag is sent to the described subscriber station that is receiving, the recovery of described pay(useful) load bag is to use the recovery operation of the quality of reception of the corresponding described subscriber station that is receiving.
19. method according to claim 18, described frame comprises:
Identifier, described identifier is packaged so that recovered by all described subscriber stations, and described identifier comprises the whether indication in quality of reception scope of the subscriber station that receiving;
Head, described is packaged so that the subscriber station in described scope can recover, and described head comprises address information; And,
At least one pay(useful) load bag, described at least one pay(useful) load bag is packaged so that at least one the described subscriber station that is indicated by described address information recovers.
20. method according to claim 19, wherein said head further comprise the format information that indicates described at least one pay(useful) load bag packing form.
21. it is one of following that method according to claim 19, wherein said head comprise that further format information, described format information comprise:
A) the packing form of described at least one pay(useful) load bag; And
B) described at least one pay(useful) load bag carries out formative identifier according to predetermined to the known packing form of described subscriber station.
22. method according to claim 21, wherein said packing form comprise at least one modulation operations and the demodulation operation that is used for to described at least one pay(useful) load bag packing.
23. method according to claim 19, wherein said identifier is packaged, is used for recovering according to the error rate that hangs down an order of magnitude than the target error rate of described frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002309472A CA2309472A1 (en) | 2000-05-25 | 2000-05-25 | Data communication channel |
| CA2,309,472 | 2000-05-25 |
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| CN1430859A CN1430859A (en) | 2003-07-16 |
| CN1240243C true CN1240243C (en) | 2006-02-01 |
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| CN01810031.7A Expired - Fee Related CN1240243C (en) | 2000-05-25 | 2001-05-17 | Frame header for data communication channel |
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| JP (1) | JP2003534745A (en) |
| CN (1) | CN1240243C (en) |
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| US6804211B1 (en) | 1999-08-03 | 2004-10-12 | Wi-Lan Inc. | Frame structure for an adaptive modulation wireless communication system |
| CA2853156C (en) | 2000-11-15 | 2015-03-24 | Wi-Lan, Inc. | Improved frame structure for a communication system using adaptive modulation |
| US6928283B2 (en) | 2002-09-20 | 2005-08-09 | Interdigitial Technology Corporation | Method and system for improved beacon acquisition performance with time slot and antenna sector reuse |
| KR100918748B1 (en) * | 2005-01-07 | 2009-09-24 | 삼성전자주식회사 | Apparatus and method for transmitting/receiving packet of multi user in a mobile communication system |
| WO2006073284A1 (en) | 2005-01-07 | 2006-07-13 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting/receiving multiuser packet in a mobile communication system |
| US7596743B2 (en) * | 2005-09-28 | 2009-09-29 | Ati Technologies Inc. | Method and apparatus for error management |
| JP4929280B2 (en) * | 2006-06-19 | 2012-05-09 | 株式会社エヌ・ティ・ティ・ドコモ | Base station, user equipment and method |
| CN101119152B (en) * | 2006-07-31 | 2012-04-25 | 上海中兴通讯技术有限责任公司 | Multi-service transmission method and device for microwave communication |
| US8923880B2 (en) * | 2012-09-28 | 2014-12-30 | Intel Corporation | Selective joinder of user equipment with wireless cell |
| GB2515539A (en) | 2013-06-27 | 2014-12-31 | Samsung Electronics Co Ltd | Data structure for physical layer encapsulation |
| CN114301572B (en) * | 2021-11-15 | 2024-01-26 | 北京智芯微电子科技有限公司 | Transmitting terminal, receiving terminal, data frame transmission method thereof and storage medium |
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| CN1099203C (en) * | 1996-03-12 | 2003-01-15 | Ntt移动通信网株式会社 | Method for intermittent receiving paging signal in mobile communication system |
| GB9709285D0 (en) * | 1997-05-08 | 1997-06-25 | Philips Electronics Nv | Flexible two-way telecommunications system |
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- 2000-05-25 CA CA002309472A patent/CA2309472A1/en not_active Abandoned
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- 2001-05-17 CN CN01810031.7A patent/CN1240243C/en not_active Expired - Fee Related
- 2001-05-17 JP JP2001586952A patent/JP2003534745A/en active Pending
- 2001-05-17 AU AU5999401A patent/AU5999401A/en active Pending
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- 2001-05-17 WO PCT/CA2001/000706 patent/WO2001091497A1/en not_active Application Discontinuation
- 2001-05-17 AU AU2001259994A patent/AU2001259994B2/en not_active Ceased
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| CA2309472A1 (en) | 2001-11-25 |
| JP2003534745A (en) | 2003-11-18 |
| AU5999401A (en) | 2001-12-03 |
| AU2001259994B2 (en) | 2007-01-18 |
| CN1430859A (en) | 2003-07-16 |
| WO2001091497A1 (en) | 2001-11-29 |
| EP1295501A1 (en) | 2003-03-26 |
| MXPA02011444A (en) | 2004-02-26 |
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