WO2002049337A1 - Procede de transmission d'une combinaison de plusieurs services - Google Patents

Procede de transmission d'une combinaison de plusieurs services Download PDF

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Publication number
WO2002049337A1
WO2002049337A1 PCT/CN2001/001185 CN0101185W WO0249337A1 WO 2002049337 A1 WO2002049337 A1 WO 2002049337A1 CN 0101185 W CN0101185 W CN 0101185W WO 0249337 A1 WO0249337 A1 WO 0249337A1
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WIPO (PCT)
Prior art keywords
tfc
sub
service
tfci
tfcs
Prior art date
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PCT/CN2001/001185
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English (en)
French (fr)
Inventor
Zhaohui Cai
Zexian Li
Original Assignee
Huawei Technologies Co., Ltd.
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Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to AU2002212071A priority Critical patent/AU2002212071A1/en
Priority to ES01980145T priority patent/ES2387669T3/es
Priority to EP01980145A priority patent/EP1343302B1/en
Publication of WO2002049337A1 publication Critical patent/WO2002049337A1/zh
Priority to US10/459,580 priority patent/US7418010B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • 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
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
    • 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
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
    • 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
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0039—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver other detection of signalling, e.g. detection of TFCI explicit signalling
    • 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
    • H04L69/14—Multichannel or multilink protocols
    • 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
    • H04L69/24—Negotiation of communication capabilities
    • 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
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a method for performing multi-service combined transmission in a communication system for multi-service concurrent transmission.
  • Modern communication systems widely use the method of transmitting in units of time slots or frames and multi-frames.
  • the communication system In order to transmit multiple services at the same time, the communication system must combine (multiplex) various service data together in a certain format at the sender, and decompose (demultiplex) each service type in the same combination format at the receiver. data.
  • the information in the service composition format is sent out in some way.
  • the receiving end decomposes the received data signal according to the received combined format information.
  • a method for multi-service combination transmission for example, when two communication parties of a base station and a mobile station initialize services, first establish a same table on both parties including all transmission format combinations, which is called a transmission format combination set ( Transport Format Combination Set (abbreviated as TFCS).
  • Transport Format Combination Set abbreviated as TFC
  • TFC Transport Format Combination Set
  • TFC Transport Format Combination Indicator
  • the receiving end finds the TFC of the received data in the TFCS table according to the received TFCI, and performs corresponding processing according to the TFC.
  • the TFCI In order to meet the needs of multiple services, the TFCI must have a certain update rate, usually at least once every 10ms. Therefore, the transmission of TFCI needs to occupy a larger proportion of channel resources. For example, in the TD-SCDMA scheme of CWTS (China Wireless Telecommunications Standards Organization), 64 chi p (chips) must be arranged in each time slot for transmission. TFCI. Summary of the invention
  • An object of the present invention is to provide a method for multi-service combined transmission, which can reduce the occupation of channel resources due to TFCI transmission, and is beneficial to increase the TFCI update rate.
  • a method for multi-service combination transmission in which the two communicating parties first establish an identical form TFCS including all TFCs during the initialization of the services, and when the service is transmitted according to a specific TFC, the TFCI corresponding to the TFC is also transmitted.
  • the receiving end finds the TFC of the received data in the TFCS table according to the received TFCI; It is characterized in that: the TFCS is divided into no less than one sub-table according to the specific channel characteristics of the service, and the TFCI is only used to indicate the sub-table The TFC does not indicate the sub-table.
  • the receiving end determines the sub-table in which the TFC is located according to the specific channel characteristics of the service transmitted by the TFC, and combines the received TFC TFCI finds the TFC of the received data in this sub-table.
  • each sub-table has a TFCI transmission mode corresponding to the sub-table, which may be a TFCI bit number, and / or a TFCI encoding mode, and / or a TFCI physical time slot mapping mode, and said The TFC I transmission method corresponding to each sub-table may be the same or different.
  • the receiving end determines the sub-table in which the TFC is located and determines the corresponding TFCI transmission mode according to the specific channel characteristics of the service transmitted by the TFC.
  • different sub-tables of the TFCS may have an overlapped portion or no overlapped portion.
  • the specific channel characteristics of the service used to divide the TFCS into not less than one sub-table, and the specific channel characteristics of the service used by the receiving end to determine the sub-table where the TFC is located may be the same or Different, but it essentially points to the same subtable.
  • the specific channel characteristics of the service used to divide the TFCS into not less than one sub-list may be the number of time slots, and / or the spreading factor, and / or the number of code channels, and / Or the data transfer rate.
  • the specific channel characteristics of the service used by the receiving end to determine the service of the sub-list where the TFC is located may be the number of time slots, and / or the spreading factor, and / or the number of code channels, and / Or data transfer rate.
  • the present invention divides the TFCS table into sub-tables. Since the number of TFCs in the sub-table is small, the number of bits corresponding to the TFCI of the sub-table is reduced.
  • the receiver uses, for example, the number of time slots, the spreading factor, and the number of code channels. Specific one or more channel characteristics such as number, data transmission rate, etc., to determine the sub-table, and then determine the number of TFCI bits corresponding to the sub-table, so as to correctly receive the TFCI.
  • the present invention can significantly reduce the number of TFCI bits, thereby saving channel resources required for transmitting TFCI. Under the same conditions as the channel resources occupied by the prior art, since the number of TFCI bits is significantly reduced, it can also be used to increase the TFCI update rate.
  • the two communication parties when the two communication parties initialize the service, they first set up the same form TFCS including all TFCs in the Chinese side.
  • the service is transmitted according to a specific TFC at the originator, the corresponding transmission is corresponding to the TFC.
  • TFCI the receiving end finds the TFC of the received data in the TFCS table according to the received TFCI.
  • TFCS table There may be several formats for a single service, and there may be more transmission combinations for multi-service combinations, so the TFCS table will be larger.
  • TFCI requires more bit information (for example, 10 ⁇ 12 bits). Not only that, in order to meet the needs of different services, TFCI must also be updated and meet a certain update rate, so the TFCI's occupation of channel resources is more prominent.
  • the sub-frame can only transmit a small number of chips, and still cannot meet the satisfactory TFCI update rate requirements. For example, when the service occupies one slot in each subframe, the number of chips in each sub-frame of TFCI is only 64 chips. If the number of bits in TFCI is about 12, there are 32 after being encoded by the Reed-Muller coding method.
  • the present invention reduces the consumption of channel resources by transmitting TTCI by reducing the number of TFCI bits.
  • the core idea of the present invention is to use the specific channel characteristics of the service (such as the number of time slots, the spreading factor, the number of code channels, the data transmission rate, etc.) to divide the TFCS table into several or No less than one sub-table, each sub-table has a corresponding number of TFCI bits, the number of TFCI bits corresponding to different sub-tables may be the same or different, and these several bits are only used to accurately indicate the sub-table
  • the TFC in the table does not indicate the sub-table, thus reducing the amount of TFCI information.
  • the method for determining the sub-list at the receiving end of the service is to determine the specific channel characteristics of the service (such as the number of time slots, spreading factors, the number of code channels, and the data transmission rate).
  • the specific channel characteristics may be
  • the channel characteristics used when the TFCS table is divided into sub-tables may also be other channel characteristics, as long as the channel characteristics essentially point to the same sub-table. Because the data transmission rate of various transmission combination formats often varies within a large range, for example, in IMT2000, the supported services are specified from several Kbit / s to 2Mbit / s. And in fact, the communication system unifies the transmission rate to various discrete values that are easier to handle for the physical layer transmission structure for various TFCs through techniques such as rate matching.
  • the TFCS table can be conveniently divided into sub-tables by using the data transmission rate.
  • the data transmission rate of each TFC in the TFCS can be sorted from large to small, and then divided into a number of uninterrupted sub-tables in a suitable manner.
  • the number of TFCs included in all subtables can be made the same, so that the number of TFCI bits corresponding to each subtable is also the same, so the receiver knows the number of TFCI bits during initialization and can Knowing the specific location of the TFCI saves the receiver from judging the number and location of TFC I bits in the service process and simplifies the system design to a certain extent.
  • the transmission rate may be divided into several segments from low speed to high speed, and TFCs falling into the same rate segment are classified into the same sub-table.
  • the number of TFCs in the sub-table is related to its transmission rate.
  • a sub-table with a small transmission rate generally contains a small number of TFCs
  • a sub-table with a high transmission rate generally contains a large number of TFCs. Therefore, for relatively small transmission rates, Table, the number of TFCI bits is relatively small.
  • the number of TFCI bits is more than the former.
  • the receiver may need to know the number of TFCI bits or other information such as the TFCI coding method in the service process. This can be judged directly by the specific channel characteristics at the receiving end, or by the specific channel first at the receiving end. Characteristics to determine the sub-table, and then determine the corresponding TFCI bit number or TFCI coding mode and other information according to the sub-table.
  • the corresponding TFCI is obtained.
  • an appropriate coding method and a mapping method of the physical time slot are selected and sent.
  • the encoding methods can be divided into a few types. For sub-table TFCs with relatively small transmission rates, repeated encoding can be used. Try to keep the ratio of the number of chips in the time slot to the total number of chips in the TFCI as much as possible, determine the appropriate slot structure, and implement the system in a simplified manner.
  • the TFCI spread spectrum mode can be consistent with the service data spread spectrum mode, or the spreading factor can be fixed.
  • the service receiving end determines the sub-table in which the TFC is located based on the specific channel characteristics of the service.
  • This specific channel characteristic may be the number of time slots S, and / or the spreading factor, and / or the number of code channels, and / or
  • the data transmission rate, that is, the subtable in which the TFC is located may be determined by using one or more channel characteristics such as the number of time slots, a spreading factor, the number of code channels, and the data transmission rate.
  • the examples that can be used to judge the listing can actually be other channel characteristics such as the slot number or a combination thereof, as long as it is substantially the same as the channel characteristics used to divide the subtable. More specifically, we can look at the case where the present invention is applied to a fixed spreading factor. Due to the number of time slots per frame, the data transmission rate can be determined.
  • various TFCS For a TFCS, various aspects of time slots S, and / or the spreading factor, and / or the number of code channels, and / or
  • the number of time slots required by the TFC should be inconsistent. So you can follow the time slot occupied by TFC Numbers are divided into different subtables. Then build TFCI --- TFC indexes according to different sub-tables. TFC corresponding to fewer timeslots are represented by fewer bits, and the number of timeslots is larger. The situation is represented by multiple bits. After better TFCS settings and TFCI--TFC configuration, each time The slot can use a fixed number of bits (or number of chips) to represent the TFCI.
  • TFCS is established for a certain connection. Assume that the total number of TFCS is N, where TFC is divided according to the number of timeslots required per frame: T1 for 1 timeslot, 2 for 2 timeslots, and 3 for 3 timeslots. , ..., Assuming that M chips are used to encode TFCI for each time slot, the indication range of TFCI for a time slot is nl, that is, M (chip)--> nl. The situation corresponds to 2 x M (chip)-> n2, ..., instead of M (chip)-> N.
  • nl «N (even blind detection can be used.) If the data transmission is the smallest, the user is allocated only one slot per subframe, When the spreading factor is 16, the data transmission rate is 8.8K. In this case, the total number of possible TFCs will be very small. Therefore, the above resource allocation is reasonable, and it is easy to ensure accuracy and can be updated quickly.
  • the TFCI coding mode can be repetitively coded.
  • the change in the spreading factor is regarded as the change in the number of time slots, the above method can be generalized to the situation where the spreading factor changes.
  • the data transmission amount of each time slot varies. If the chci number of TFCI is fixed and the TFCI spreading method is the same as the data spreading method, the relative value of the data rate and the number of TFCI bits There is no change. So the same approach can be used.
  • the TFCI spreading method can be taken in exactly the same way as the data to simplify the system; it can also have a fixed number of ch ips occupied by TFC I in each slot structure; it can also be based on the slot's
  • the number and the spreading factor determine the correspondence between TFCI and TFC, which is equivalent to dividing TFCS into sub-tables according to the number of time slots and the spreading factor.
  • the system may take the above process into consideration when setting up TFCS according to the type of service, in order to simplify the division of TFCS sub-tables and the correspondence between TFC and TFCI.

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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)
  • Time-Division Multiplex Systems (AREA)
  • Communication Control (AREA)

Description

多业务组合传输的 -方法 技术领域
本发明涉及通信技术领域， 特别是涉及一种在多业务并发传输的通信*** 中进行多业务组合传输的方法。 发明背景
现代的通信***广泛采用以时隙或帧， 复帧为单位传送的方法。 为了同时 传输多种业务，通信***必须在发送端按照一定的格式把各种业务数据组合（复 接）在一起， 在接收端再按照相同的组合格式分解出 （解复接）各业务类型的 数据。发送端在发送数据的同时^ 业务组合格式的信息通过某种方式发送出去。 接收端根据接收的组合格式的信息来分解接收数据信号。
具体来讲， 现有技术中多业务组合传输的方法， 例如基站和移动台的通信 双方在业务初始化时， 先在双方建立一个相同的包括所有传输格式组合的表， 称为传输格式组合集（Transport Format Combinat ion Set , 简写为 TFCS)， 当 业务在发端按照某种传输格式组合（Transport Format Combinat ion 简写为 TFC, TFC可能包含了复接的方式， 各业务的特征, 如编码方式等等） 传输时， 同时传送传输格式组合指示（Transport Format Combinat ion Indicator , 简称 TFCI ) , 接收端根据接收到的 TFCI在 TFCS表中查到接收数据的 TFC, 根据 TFC作 相应的处理。
为了满足多业务的需求， TFCI必须有一定的更新速率，通常要满 至少 10ms 更新一次。 因此， TFCI的传输就需要占用较大比重的信道资源，例如在 CWTS (中 国无线通信标准组织）的 TD - SCDMA方案中，每个时隙中要安排 64个 chi p (码片） 专用于传输 TFCI。 发明内容
本发明的目的在于提供一种多业务组合传输的方法， 其可减少因 TFCI的传 输而对信道资源的占用， 和有利于增加 TFCI的更新速率。
一种多业务组合传输的方法， 其中通信双方在业务初始化时， 先在双方建 立一个相同的包括所有 TFC的表格 TFCS, 当业务在发端按照特定 TFC传输时， 也 传送与该 TFC相对应的 TFCI ,接收端根据接收到的 TFCI在 TFCS表中查到接收数据 的 TFC; 其特征在于： 所述的 TFCS按照业务的特定信道特征划分成不少于一个子 表， TFCI仅用于指示子表中的 TFC而不指示该子表， 当业务在发端按照特定子表 中的 TFC传输时， 接收端根据本次 TFC传输的业务的特定信道特征来确定该 TFC 所在的子表， 并结合接收到的 TFCI在该子表中查到接收数据的 TFC。
较佳地， 每一子表均有与该子表相对应的 TFCI传输方式， 可以是 TFCI的比 特数、 和 /或 TFCI的编码方式、 和 /或 TFCI的物理时隙映射方式， 且所述对应于 各子表的 TFC I传输方式可以相同或不同。
较佳地， 当业务在发端按照特定子表中的 TFC传输时， 接收端根据本次 TFC 传输的业务的特定信道特征来确定该 TFC所在的子表并确定相应的 TFCI传输方 式。
较佳地， 所述的 TFCS的不同子表， 允许有交叠部分也可以没有交叠部分。 较佳地，所述的用以将 TFCS划分成不少于一个子表的业务的特定信道特征， 和所述的由接收端用以确定 TFC所在子表的业务的特定信道特征，可以相同或不 同， 但其本质上指向同一子表。
较佳地，所述的用以将 TFCS划分成不少于一个子表的业务的特定信道特征， 可以是时隙的数目、和 /或扩频因子、和 /或码道的个数、和 /或数据的传输速率。
较佳地， 所述的由接收端用以确定 TFC所在子表的业务的特定信道特征， 可 以是时隙的^目、 和 /或扩频因子、 和 /或码道的个数、 和 /或数据的传输速率。
. 本发明将 TFCS表划分为子表， 由于子表中 TFC的个数较少， 因而降低了相应 于该子表的 TFCI的比特数。 接收方通过例如时隙的数目、 扩频因子、 码道的个 数、 数据的传输速率等特定的一个或多个信道特征， 来确定子表， 进而确定相 应于该子表的 TFCI比特数， 从而正确接收 TFCI。 - 本发明可以明显降低 TFCI的比特数， 从而节省传输 TFCI所需的信道资源。 在与现有技术占用的信道资源相同的条件下， 由于 TFCI的比特数明显降低， 还 可用于提高 TFCI更新的速率。 实施本发明的方式
为使本发明的目的、 技术方案和优点更加清楚明白， 以下举实施例， 对本 发明进一步详细说明。 所应理解的是，其仅用于对本发明的阐述说明而非限制。
现有技术中多业务组合传输的方法， 通信双方在业务初始化时， 先在汉方 建立一个相同的包括所有 TFC的表格 TFCS , 当业务在发端按照特定 TFC传输时， 同时传送与该 TFC相对应的 TFCI，接收端根据接收到的 TFCI在 TFCS表中查到接收 数据的 TFC。
单个业务的格式可能存在数种， 而多业务组合起来的传输组合的方式可能 更多， 因此 TFCS表就会比较大， 为了准确地指示出位于 TFCS中的 TFC, TFCI需要 较多比特信息（例如 10 ~ 12个比特）来描述。 不仅如此， 为了满足不同业务的 需求， TFCI还必须进行更新且满足一定的更新速率， 由此 TFCI对信道资源的占 用情况就比较突出。
例如在 CWTS提出的 TD - SCDMA方案中.，每个时隙中要安排 64个 chip专用于传 输 TFCL 但即使如此， 对于在每个子帧中只占用较少时隙的业务， 由于其在每 一子帧只能传输较少的 chip数， 仍然无法达到满意的 TFCI更新速率要求。 例如 当业务在每一子帧中占用一个时隙的情况下， 则 TFCI每子帧的 chip数仅仅为 64chip, 若按照 TFCI比特数为 12个左右， 经 Reed— Mul ler编码方式编码后有 32 个比特， 当扩频因子为 16时， 由于每子帧只能传输 64chip, 因此需要传 8个子帧 才能对 TFCI更新一次， 这样就不能满足对 TFCI要每 10ms更新的一次的要求。 如 果通过提高 TFCI在每个时隙中占用的 chip数来解决此问题， 则对于时隙的数目 较多， 或者扩频因子较低的情况， 其 TFCI所占用的资源又显得太多， 导致信道 资源的更大耗费。
本发明通过减少 TFCI的比特数， 来减低传输 TTCI而对信道资源的耗费。 为 了减少 TFCI的比特数， 本发明的核心思想是利用业务的特定信道特征（例如时 隙的数目、 扩频因子、 码道的个数、 数据的传输速率等）将 TFCS表划分出若干 个或不少于一个子表， 每一子表具有与之相对应的一个 TFCI比特个数， 不同子 表相对应的 TFCI比特个数可以相同或者不同， 这若干个比特仅用于准确指示出 该子表内的 TFC, 而并不指示出该子表， 因此降低了 TFCI的信息量。 在业务的接 收端确定子表的方法是才 M居业务的特定信道特征（例如时隙的数目、扩频因子、 码道的个数、 数据的传输速率等） , 该特定信道特征可以是将 TFCS表划分成子 表时所用的信道特征， 也可以是其他信道特征， 只要该信道特征本质上指向同 一子表即可。 由于各种传输组合格式的数据传输速率往往在一个很大的范围内变动， 譬 如在 IMT2000中， 规定支持的业务从几 Kbi t/s到 2Mbi t/s。 并且实际上， 通信系 统对于各种 TFC,通过速率匹配等技术，把传输速率统一到物理层传输结构比较 容易处理的一些离散的值。 因此可以方便的利用数据的传输速率将 TFCS表划分 成子表。 具体来讲， 可以将 TFCS中的各个 TFC的数据传输速率从大到小排序， 然 后以合适的方式将之分成不间断的若干个子表。 例如举例来讲， 可以令所有子 表所包含的 TFC数目都相同，这样各个子表相对应的 TFCI的比特数也就相同， 由 此接收端在初始化时就已知 TFCI的比特个数并可已知该 TFCI的具***置， 省却 了接收端在业务过程中对 TFC I比特个数及位置的判断， 从一定程度上简化*** 设计。
再例如举例来讲， 也可以将传输速率从低速到高速均勾划分为若干段， 落 入同一速率段中的 TFC被归于同一子表。 这样由于一般情况下子表内的 TFC的数 目与其传输速率有关， 传输速率比较小的子表， 一般含有 TFC的数目比较少， 传 输速率比较高的子表， 一般包含的 TFC数目较多。 由此对于传输速率比较小的子 表， 其 TFCI的比特数就比较少， 对于传输速率比较高的子表， 其 TFCI的比特数 相较于前者就比较多。 这一点正适应了以下规律 Γ 即每一帧 （子帧） 中分配给 传输速率小的 TFC的用以传输 TFCI的资源（例如时隙）较少， 分配给传输速率大 的 TFC的用以传输 TFC1的资源（例如时隙）较多。 由此更加明显降低了每一时隙 中 TFCI所占用的比特数。
在以上情况下， 接收方可能需要在业务过程中得知 TFCI的比特数或例如 TFCI编码方式等其他信息， 这可以在接收端直接通过特定信道特征来判断， 也 可以在接收端先通过特定信道特征来判断子表， 再根据该子表判断出与之相对 应的 TFCI的比特数或 TFCI的编码方式等信息。
根据子表的划分和子表里 TFC, TFCI对应关系， 得到相应的 TFCI , 根据子表 的类型， 选择适当的编码方式和物理时隙的映射方式发送出去。 编码方式可以 分成少数几种， 对于传输速率比较小的子表内 TFC, 可以采用重复编码。 尽量使 TFCI在时隙的码片数占整个码片数的比例不变， 确定合适的时隙结构， 以筒化 ***的实现。 在扩频***中， 为简化***的设计， 可以使 TFCI的扩频方式与业 务数据的扩频方式保持一致， 或者固定扩频因子。
业务接收端通过业务的特定信道特征来确定该 TFC所在的子表，这种特定信 道特征可以是时隙的数 S、 和 /或扩频因子、 和 /或码道的个数、和 /或数据的传 输速率， 也即可以是通过时隙的数目、 扩频因子、 码道的个数、 和数据的传输 速率等等一个或者多个信道特征， 来判断该 TFC所在的子表。 当然， 可用来判断 罗列的例子， 实际上还可以是例如时隙的编号等其他的信道特征或其组合， 只 要其实质上与划分子表所用的信道特征指向同一子表即可。 更加具体来讲，我们可以再举例看一下本发明应用于固定扩频因子的情况。 由于每帧时隙的数目， 可以决定数据的传输速率， 对一个 TFCS, 其中各种
TFC的所需要的时隙的数目应当是不一致的。 所以可以按照 TFC所需占用的时隙 数划分 '成不同的子表。 然后按照不同的子表建立 TFCI -― TFC的索引。 对应于时 隙较少的 TFC使用较少比特数来表示， 时隙数多^情况， 用多的比特数来表示， 经过较好的 TFCS的设置和 TFCI- - TFC的配置， 使得每个时隙使用固定的比特数 (或 chip数）来表示 TFCI即可。
可以举例说明如下：对于某次连接建立 TFCS。假设 TFCS的总数为 N,其中 TFC 按照其每帧所需的时隙数分为： 1个时隙的 TFC有 nl个， 2 个时隙的 TFC有 n2个， 3 个时隙的 TFC有 n3个， ...， 假设固定每个时隙使用 M个 chip来对 TFCI来编码， 则对一个时隙时 TFCI的指示范围为 nl， 即 M (chip) - -〉 nl , 两个时隙的情形对 应为 2 x M (chip) -- >n2 , ... , 而不是 M (chip)—>Ν。
由于在一般情况下， 少的时隙可以实现的 TFC的个数相对较少， nl«N, (甚 至可以使用盲格式检测。 ）如数据传输最小时， 分配用户每子帧仅一个时隙， 且 扩频因子为 16时， 数据传送速率为 8. 8Κ, 这种情况下， 可能的 TFC的总数将会非 常之少。 所以上面的资源配置较为合理， 并且易于保证精度， 能快速更新。
时隙较少的子表， 可以对 TFCI的编码方式釆取重复编码。 只要把扩频因子的变化看成时隙数目的变化， 上述方法即可推广到扩频因 子变化的情形。
由于扩频因子的变化每个时隙的数据传输量有所变化， 若固定 TFCI的 ch i p 数， 并且 TFCI的扩频方式与数据扩频方式相同的， 数据速率与 TFCI的比特数的 相对值是没有变化的。 故同样可以使用上面的做法。
综上所述， 可以对 TFCI的扩频方式可以采取与数据完全相同的做法， 以简 化***； 也可以每个时隙结构内 TFC I所占的 ch i p数一定； 还可以根据时隙的数 目和扩频因子确定 TFCI与 TFC的对应关系，相当于把 TFCS根据时隙的数目与扩频 因子分成子表。 ***在根据业务类型设置 TFCS可考虑到上述过程， 以简化 TFCS 子表的划分， 和 TFC和 TFCI的对应。

Claims

权利要求书
1、 一种多业务组合传输的方法， 其中通信双方在业务初始化时， 先在双方 建立一个相同的包括所有 TFC的表格 TFCS， 当业务在发端按照特定 TFC传输时， 也传送与该 TFC相对应的 TFCI ,接收端根据接收到的 TFCI在 TFCS表中查到接收数 据的 TFC; 其特征在于：
所述的 TFCS按照业务的特定信道特征划分成不少于一个子表， TFCI仅用于 指示子表中的 TFC而不指示该子表，当业务在发端按照特定子表中的 TFC传输时， 接收端根据本次 TFC传输的业务的特定信道特征来确定该 TFC所在的子表， 并结 合接收到的 TFC I在该子表中查到接收数据的 TFC。
1、 如权利要求 1所 的多业务组合传输的方法， 其特征在于： 每一子表均 有与该子表相对应的 TFCI传输方式， 可以是 TFCI的比特数、 和 /或 TFCI的编码方 式、 和 /或 TFCI的物理时隙映射方式， 且所述对应于各子表的 TFCI传输方式可以 相同或不同。 .
3、 如权利要求 2所述的多业务组合传输的方法， 其特征在于： 当业务在发 端按照特定子表中的 TFC传输时， 接收端根据本次 TFC传输的业务的特定信道特 征来确定该 TFC所在的子表并确定相应的 TFCI传输方式。
4、 如权利要求 1所述的多业务组合传输的方法， 其特征在于： 所述的 TFCS 的不同子表， 允许有交叠部分也可以没有交叠部分。
5、 如权利要求 1所述的多业务组合传输的方法， 其特征在于： 所述的用以 将 TFCS划分成不少于一个子表的业务的特定信道特征， 和所述的由接收端用以 确定 TFC所在子表的业务的特定信道特征，可以相同或不同，但其本质上指向同 一子表。
6、 如权利要求 1所述的多业务组合传输的方法， 其特征在于： 所述的用以 将 TFCS划分成不少于一个子表的业务的特定信道特征， 可以是时隙的数目、和 / 或扩频因子、 和 /或码道的个数、 和 /或数据的传输速率。
7、 如权利要求 1所述的多业务组合传输的方法， 其特征在于： 所述的由接 收端用以确定 TFC所在子表的业务的特定信道特征， 可以是时隙的数目、 和 /或 扩频因子、 和 /或码道的个数、 和 /或数据的传输 i率。
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