WO2011060705A1 - 一种根据目标编码速率传输信息的方法、基站及移动终端 - Google Patents

一种根据目标编码速率传输信息的方法、基站及移动终端 Download PDF

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Publication number
WO2011060705A1
WO2011060705A1 PCT/CN2010/078769 CN2010078769W WO2011060705A1 WO 2011060705 A1 WO2011060705 A1 WO 2011060705A1 CN 2010078769 W CN2010078769 W CN 2010078769W WO 2011060705 A1 WO2011060705 A1 WO 2011060705A1
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Prior art keywords
information bits
base station
information
incremental
coding rate
Prior art date
Application number
PCT/CN2010/078769
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English (en)
French (fr)
Inventor
周雷
孔雪丽
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华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to BR112012011945-1A priority Critical patent/BR112012011945B1/pt
Priority to EP10831120.0A priority patent/EP2442473B1/en
Publication of WO2011060705A1 publication Critical patent/WO2011060705A1/zh
Priority to US13/355,994 priority patent/US8526534B2/en

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Classifications

    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • 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
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0064—Concatenated codes
    • H04L1/0066—Parallel concatenated codes
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0067—Rate matching
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • 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]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • 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

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, a base station, and a mobile terminal for transmitting information according to a target coding rate.
  • the quality of the radio links of mobile terminals located at different locations is quite different, the channel conditions between some mobile terminals and base stations are relatively good, and others are very bad.
  • the base station can only design the coding rate according to the quality of service of the terminal with poor cell channel quality, and then, at the designed coding rate. All terminals in the community transmit information.
  • the first mobile terminal is closer to the base station, the channel condition is better, and the probability of correctly receiving the signal with a lower coding rate is greater, and the second mobile terminal is farther from the base station, and the channel condition is Poor, the probability of correctly decoding a signal with a higher encoding rate is smaller.
  • the base station transmits the broadcast multicast information, in order to balance both the first mobile terminal and the second mobile terminal, the received signal can be correctly decoded, and the information can only be transmitted at the coding rate that the second mobile terminal can receive.
  • the prior art has at least the following disadvantages: Since the base station transmits information at a lower coding rate, all mobile terminals that need to receive broadcast multicast information must maintain the radio frequency reception state until The broadcast multicast information to be received is transmitted, which not only increases the power consumption of the mobile terminal, but also brings the broadcast multicast information received by the mobile terminal with better channel conditions to a large amount of redundancy. And the reception efficiency is low. Summary of the invention
  • Embodiments of the present invention provide a method for transmitting information according to a target coding rate, a receiving method, a base station, and a mobile terminal, to save power of the mobile terminal and reduce redundancy.
  • a method for transmitting information according to a target encoding rate including:
  • the target coding rate is a coding rate used by the base station when the mobile terminal can correctly decode the information transmitted by the base station.
  • a method for a receiving base station to transmit information according to a standard encoding rate including:
  • the target coding rate is a coding rate used by the base station when the mobile terminal can correctly decode the information transmitted by the base station.
  • a base station is further provided for transmitting information according to a target coding rate, including:
  • a matching unit configured to obtain a basic information bit and at least one incremental information bit from the information encoded by the base station according to the target coding rate
  • a sending unit configured to sequentially transmit the basic information bits and at least one incremental information bit to the mobile terminal at a determined time interval
  • the target coding rate is a coding rate used by the base station when the mobile terminal can correctly decode the information transmitted by the base station.
  • a mobile terminal including:
  • a receiving unit configured to receive, by the base station, basic information bits obtained from information encoded by the base station according to a target coding rate
  • a decoding unit configured to determine, during a determined time interval, whether the basic information bits can be correctly decoded
  • the receiving unit is further configured to: when the decoding unit correctly decodes, stop receiving, by the base station, the incremental information bits obtained by the base station encoded information according to the target coding rate, which are sequentially transmitted at the determined time interval,
  • the target coding rate is the coding rate used by the base station when the mobile terminal can correctly decode the information transmitted by the base station.
  • basic information bits and at least one incremental information bit are obtained according to a target coding rate, and are transmitted to a mobile terminal, so that when the mobile terminal correctly decodes the basic information bits, it is not required to receive the increment.
  • the mobile terminal can save power and reduce the redundancy that is present.
  • FIG. 1 is a diagram showing a coding process of a turbo code according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for transmitting information according to a target coding rate according to an embodiment of the present invention
  • FIG. 3 is a first schematic diagram of obtaining basic information bits and incremental information bits according to an embodiment of the present invention
  • FIG. 4 is a second schematic diagram of obtaining basic information bits and incremental information bits in an embodiment of the present invention.
  • FIG. 5 is a first schematic diagram of transmitting basic information bits and incremental information bits in an embodiment of the present invention.
  • FIG. 6 is a first schematic diagram of transmitting basic information bits and incremental information bits in an embodiment of the present invention
  • FIG. 7 is a schematic diagram of transmitting broadcast information according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of transmitting multicast information in an embodiment of the present invention.
  • FIG. 9 is a first flowchart of a method for receiving information transmitted by a base station according to an embodiment of the present invention
  • FIG. 10 is a second flowchart of a method for receiving information transmitted by a base station according to an embodiment of the present invention. The first structural diagram
  • FIG. 12 is a second structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 13 is a first structural diagram of a mobile terminal according to an embodiment of the present invention.
  • FIG. 14 is a second structural diagram of a mobile terminal according to an embodiment of the present invention. detailed description
  • the mobile station in order to face the harsh wireless channel conditions, in order to ensure the information transmission that can be prioritized, the mobile station (BaseStat n , BS ) needs to encode the transmitted information, and then select and channel conditions.
  • the adaptive coding rate encodes the information that needs to be transmitted, and the coded information bits are then rate matched, or may be moved to puncturing.
  • the coding of the turbo code is performed as an example, as shown in FIG. 1.
  • Figure 1 is a diagram showing the encoding process of a turbo code of 1/3 encoding rate.
  • the encoded information includes three parts of information, the first part of information is the input original information bits, which may also be referred to as system bits; the second part of information is that the input original information bits are encoded by the component encoder 1
  • the output information may also be referred to as check bit 1 or the first check bit;
  • the third part of information is that the input original information bits are first interleaved, and then outputted by the component encoder 2, which may also be called It is a check bit 2 or a second check bit.
  • the three pieces of information have the same number of bits, which are equal to the input original information bits, and the three pieces of information are combined as the final output information encoded by the turbo code.
  • the final output information encoded by the turbo code needs to be rate matched before transmission to select the information bits to be transmitted.
  • the base station is in communication with a plurality of mobile terminals, and the plurality of mobile terminals are in different channel condition environments.
  • the base station is also in the same channel condition environment.
  • the mobile terminal can correctly receive information transmitted at the same or approximately the same coding rate, and the base station can transmit at the same or approximately the same coding rate that the mobile terminal can correctly receive in such an environment.
  • the information, in this case, the coding rate is shifted to the target coding rate of the mobile terminal.
  • the base station can transmit information to a mobile terminal in such a good channel condition with a higher coding rate, and the mobile terminal can correctly receive the transmission at the coding rate.
  • the probability of information is relatively large; for a mobile terminal in a bad or poor channel environment, the base station can transmit information to a mobile terminal in such a good environment with a lower coding rate, and the mobile terminal can be correct.
  • the probability of receiving a signal transmitted at this coding rate, I is relatively large.
  • the target coding rate is a coding rate used by the base station when the mobile terminal can correctly decode the information transmitted by the base station.
  • the base station obtains basic information bits and at least one incremental information bit from the information encoded by the base station according to the target coding rate of the mobile terminal (MS); it may also be understood that, according to the target coding Rate is used for rate matching to obtain basic information bits and at least one incremental information bits from the encoded information.
  • MS mobile terminal
  • the basic information bits are partial information bits selected in the rate matching process in order to satisfy the requirement of the highest target encoding rate, and the incremental information bits are selected in the speed matching process to satisfy other target encoding rates.
  • Information bits are included in the selection of the basic information bits and the selection of the incremental information bits.
  • the obtaining of the basic information bits and the incremental information bits may include the following steps:
  • AA interleaving the encoded three-part information of the turbo code; in this step, after the base station performs the encoding of the turbo code, three pieces of information, namely system bit, check bit 1 and check bit 2, are generated; In the process of interleaving, the system bits are interleaved, and the check bit 1 and the check bit 2 are interleaved;
  • CC obtain basic information bits according to the target coding rate; in this step, the target coding rates in multiple MSs may be sorted, and the highest target coding rate is encoded from The basic information bits are obtained in the information bits.
  • a base station and six MS communication connections are taken as an example.
  • the target coding rates of the two are the same or Approximately the same, it may be a VI;
  • the third MS and the fourth MS are in the same or approximately the same channel condition environment, and the target coding rates of the two in this environment are the same or approximately the same, and may be V2;
  • the fifth MS and the sixth When the MS processes the same or approximately the same channel condition, the target coding rates of the two environments are the same or approximately the same, which may be V3.
  • V1>V2>V3 that is, the VI is the highest target code.
  • the basic information bits are obtained at the highest target coding rate, i.e., the VI is used to obtain the basic information bits.
  • the start bit of the basic information bit in the interleaved information bits is first calculated; and the length of the basic information bit is obtained according to the constraint relationship between the original information bit and the basic information bit.
  • the constraint of the original information bits and the basic information bits is such that the ratio of the length of the original information bits to the length of the basic information bits is equal to the target coding rate VI. Therefore, basic information bits can be obtained from the interleaved information bits according to the starting position and length;
  • DD Obtain at least one incremental information bit according to the target coding rate; in this embodiment, corresponding incremental information bits are sequentially obtained from the encoded information bits according to the remaining target coding rate value. Since V1 > V2, it is necessary to receive the basic information bits and the increment information bits obtained in V2 for the third MS and the fourth MS.
  • the stop bit of the basic information bit can be used as the start bit of the incremental information bit, and the length of the incremental information bit can be obtained according to the constraint relationship between the original information bit and the basic information bit and the incremental information bit. .
  • the constraint relationship between the original information bits and the basic information bits and the incremental information bits is such that the length of the original information bits and the ratio of the lengths of the basic information bits and the incremental information are equal to the target coding rate V2. Since the length of the basic information bits has been obtained in the step CC, the length of the incremental information bits can be obtained according to the above constraint relationship. In this embodiment, since the third MS and the fourth MS are at the second highest target coding rate, the third MS and the fourth MS only need to receive one incremental information bit.
  • the fifth MS and the sixth MS Since V1>V2>V3, it is necessary for the fifth MS and the sixth MS to receive the basic information bits, the incremental information bits obtained at V2, and the incremental information bits obtained at V3.
  • the stop bit of the increment information bit obtained immediately after V2 is used as the increment letter obtained in V3.
  • the start bit of the bit, and then the length of the incremental information bit is obtained according to the constraint relationship between the original information bit and the basic information bit, the incremental information bit obtained by V2, and the incremental information bit obtained by V3.
  • the original information bits and the basic information bits and the basic information bits, the incremental information bits obtained by V2, and the incremental information bits obtained by V3 are the relationship between the length of the original information bits and the basic information bits, and the V2 is The obtained incremental information and the length of the incremental information obtained by V3 are proportional to the target encoding rate V3.
  • the fifth MS and the sixth MS since the fifth MS and the sixth MS are at the lowest encoding rate, the fifth MS and the sixth MS need to receive two incremental information bits.
  • the corresponding target information bits and the plurality of incremental information bits can be obtained according to the above description.
  • the process of obtaining the basic information bits and the incremental information bits may refer to the figure.
  • VI is 1/2, V2 is 1/4, and V3 is 1/6; in Figure 4, VI is 2/3, V2 is 1/3, and V3 is 2/9.
  • VI, V2, and V3 are just examples, and the corresponding target coding rate needs to be obtained according to the actual network condition.
  • Step S202 The basic information bits and the at least one incremental information bit are sequentially transmitted to the MS according to the determined time interval on the time-frequency domain resource.
  • the BS may select a suitable time-frequency resource according to the current channel condition to transmit the basic information bit and the at least one incremental information bit, and may sequentially transmit the basic information bit and the at least one at a determined time interval every 4 ms. Increase the information bits.
  • the determined time interval can also be determined based on the time required for the MS to decode the basic information bits and the incremental information bits.
  • 4ms is only an example, and those skilled in the art can adjust according to the actual channel network situation.
  • FIG. 5 and FIG. 6 are respectively one of the transmissions. the way.
  • the basic information bits and the incremental information bits occupy different time resources, respectively, and the positions of the occupied frequency resources are also staggered from each other.
  • the MS in the environment with good channel conditions only needs to receive the basic information bits to correctly decode, and after correct decoding, it does not need to receive the incremental information bits, so that the channel condition is good.
  • the MS does not always maintain the RF reception state, and there is no redundancy, which saves power.
  • MSs with poor information or low or harsh environments because of the acceptable target coding rates for MSs in this environment Low, after receiving the basic information bits, it is necessary to receive one or more incremental information bits before decoding.
  • the MS in the environment with good channel conditions will not maintain the radio receiving state all the time, and there will be no redundancy, so that power consumption can be saved.
  • the base station can transmit information in the form of broadcast or multicast when transmitting information. The following will be described separately.
  • the first type When transmitting information in the form of broadcast, the BS groups the MSs that receive the broadcast information according to the network planning situation in the broadcast system, and groups the MSs with the same channel quality into one group, for the MSs in the same group. Use the same target encoding rate. Take FIG. 7 as an example for explanation. In FIG. 5, the dotted line is used as the dividing line, and the MSs in the range covered by the broken line belong to the same group, that is, MS 1 and MS 2 are a group, MS3 and MS4 are a group, MS5 and MS6 are a group, and three groups are The target encoding rates are different, set to VI, V2, and V3, respectively, and are sequentially lowered, that is, V1>V2>V3.
  • the BS After performing the turbo code encoding on the broadcast information to be transmitted, the BS performs rate matching on the VI according to the VI to obtain basic information bits, and then performs rate matching according to V2 and V3 to generate incremental information bits 1 and Incremental information bit 2, this process can refer to step S200 and Figure 3, Figure 4.
  • the MSs in the multicast group when transmitting information in the form of multicast, first, the MSs in the multicast group first measure the quality of the base station to the respective downlink channels, and feed back the measurement result to the BS, and the BS determines according to the downlink channel quality.
  • the target coding rate, and each MS in the multicast group uses the same target coding rate for the MSs in the same group.
  • FIG. 8 Take FIG. 8 as an example for explanation.
  • the target coding rates of the three groups are different, set to VI, V2, V3, respectively, and decrease in turn, that is, V1>V2>V3.
  • the BS After performing the turbo code encoding on the multicast information to be transmitted, the BS performs rate matching on the VI according to the VI to obtain basic information bits, and then performs rate matching according to V2 and V3 to generate incremental information bits respectively.
  • increment information bit 2 this process can refer to step S200 and Figure 3, Figure 4.
  • the length of the basic information bit block and the length of the incremental information bit block may be equal or unequal, but the basic information bits and the incremental information bit block should be the minimum unit of the system resource scheduling. , and basic information bits and incremental letters
  • the length of the bit block is an integer multiple of the base unit length.
  • M S can provide feedback on whether the basic information bits and incremental information bits of the B S transmission can be correctly decoded.
  • the BS can adjust the target coding rate according to the feedback condition of the MS, and reacquire the basic information bit and the incremental information bit. If all the MSs receive the basic information bits after a period of time When the ACK is fed back, the BS only needs to send the basic information bits, and does not need to send the information incremental information bits. On the one hand, the occupied resources of the base station can also be saved to transmit the incremental information bits. If only a certain MS feeds back a NACK, the BS can transmit a retransmission basic information bit and an incremental information bit for the MS.
  • FIG. 9 is a first flowchart of a method for receiving information transmitted by a base station according to an embodiment of the present invention, that is, a flowchart when receiving broadcast information.
  • step S900 basic information bits are received. In this embodiment, whether it is in an environment with good channel conditions or in an environment with poor channel conditions, it is necessary to receive basic information bits.
  • Step S902 determining whether decoding is needed within the determined time interval.
  • the determined time interval here is the same as the determined time interval of the sequential transmission of the base station. It may be 4 ms. Of course, the determined time interval may also be determined according to the time required for the MS to decode the basic information bits and the incremental information bits. In the present embodiment, 4ms is only an example, and those skilled in the art can adjust according to the actual channel network situation.
  • the MS may set a corresponding decoding trigger threshold according to its own channel condition. If the current channel condition is greater than the set threshold, step S904 is performed, and if the current channel condition is not greater than the set threshold, step S910 is performed.
  • the MS may also set the decoding trigger threshold according to the coding rate, the size or length of the coded interleave block, the channel condition, the decoding algorithm, the number of decoding iterations, and the quality of service level of the MS.
  • turbo coding interleaver size 1640, using the max-log-map decoding algorithm, to ensure the MS decodes the error rate is not greater than 10.1, not several ⁇ ] encoding
  • the reference decoding trigger threshold corresponding to the rate. Rate 1/4 1/2 2/3 3/4 4/5 1
  • Step S904 decoding the received information bits.
  • the received basic information bits are decoded within a determined time interval.
  • the received basic information bits and incremental information bits can also be decoded within a determined time interval.
  • Step S606 Determine, in the determined time interval, whether the decoding is successful. In this embodiment, if the decoding is successful, step S908 is performed; if the decoding is unsuccessful, step S910 is performed.
  • Step S908 terminating the information sent by the receiving base station.
  • the incremental information bits obtained from the base station encoded information according to the target coding rate sequentially transmitted by the receiving base station at the determined time interval are stopped.
  • step S908 After performing step S908, the MS ends the entire receiving process.
  • Step S910 determining whether the incremental information bit is received.
  • the MS can still decode the basic information bits and the incremental information bits sent by the Bs, and the MS can only end the receiving process. If it is determined that the incremental information bits are not received, step S912 is performed, that is, the MS cannot successfully decode according to the currently received basic information bits, and needs to increment the information bits to decode, or according to the currently received basic information bits and parts. The amount information bits are not yet successfully decoded and require more incremental information bits to decode.
  • Step S912 Receive incremental information bits.
  • step S902 is continued.
  • the MS if the MS receives the basic information bits, it can decode correctly, and does not need to receive the incremental information bits again, so that the radio receiving state is not always maintained, and no redundancy is generated, thereby saving power consumption. If the MS receives the basic information bits and part of the incremental basic information, it can decode correctly. It does not need to receive more incremental information bits, and it will not maintain the RF reception status all the time, and there will be no redundancy. , which can save power consumption.
  • FIG. 10 is a second flowchart of a method for receiving information transmitted by a base station according to an embodiment of the present invention, that is, a flowchart when receiving multicast information.
  • step S1000 receiving basic information bits.
  • step S1000 whether in an environment with good channel conditions or in an environment with poor channel conditions, Need to receive basic information bits.
  • Step S1002 Determine whether decoding is needed within the determined time interval.
  • Step S1004 Decode the received information bits.
  • the received basic information bits are decoded within a determined time interval.
  • the received basic information bits and incremental information bits can also be decoded.
  • Step S1006 Determine whether the decoding is successful within the determined time interval. In this embodiment, if the decoding is successful, step S1008 is performed; if the decoding is unsuccessful, step S1012 is performed.
  • Step S1008 feeding back an ACK signal to the BS.
  • the ACK signal is fed back to the BS to inform the MS that the multicast information sent by the BS can be successfully decoded, and the remaining multicast information is not sent.
  • step S 1 100 is executed to terminate receiving multiple information. And end the entire receiving process.
  • Step S 1 12 determining whether the incremental information bits are received.
  • step S 1014 is performed to feed back the NACK signal to the BS, that is, after the MS receives the basic information bits and the incremental information bits sent by the BS, the MS still cannot decode.
  • the MS can only end the receiving process, and the BS can transmit retransmission basic information bits and incremental information bits for the MS.
  • step S 1016 is performed, that is, the MS cannot successfully decode according to the currently received basic information bits, and needs to increment the information bits to decode, or according to the currently received basic information bits and parts.
  • the incremental information bits are not yet successfully decoded and require more incremental information bits to decode.
  • Step S1016 receiving incremental information bits.
  • step S1002 is performed.
  • the MS if the MS receives the basic information bits, it can decode correctly, and does not need to receive the incremental information bits again, so that the radio receiving state is not always maintained, and no redundancy is generated, thereby saving power consumption. If the MS receives the basic information bits and part of the incremental basic information, it can decode correctly. It does not need to receive more incremental information bits, and it will not maintain the RF reception status all the time, and there will be no redundancy. , which can save power consumption.
  • the BS can adjust the target coding rate according to the feedback condition of the MS, and re-acquire the basic information bits and the incremental information bits. If all the MSs receive the basic information bits after a period of time Both feedback ACK, then the BS only needs to send the basic message. The information bits do not need to be sent again to increment the information bits. On the one hand, the occupied resources of the base station can also be saved to transmit the incremental information bits. If only a certain MS feeds back a NACK, the BS may transmit a retransmission basic information bit and an incremental information bit for the MS.
  • FIG. 11 is a first structural diagram of a base station according to an embodiment of the present invention.
  • the base station 11 transmits broadcast information, and the base station can be connected to multiple MSs.
  • the multiple mobile terminals are in different channel condition environments. Of course, they are also in the same channel condition environment.
  • the mobile terminal can correctly receive information transmitted at the same coding rate, and the base station can transmit information at the same coding rate that the mobile terminal can correctly receive in such an environment.
  • the lower coding rate is shifted to the target coding rate of the mobile terminal.
  • the base station can transmit information to a mobile terminal in such a good channel condition with a higher coding rate, and the mobile terminal can correctly receive the transmission at the coding rate.
  • Information for mobile terminals in a bad or poor channel environment, the base station can transmit information to the mobile terminal in such a good environment with a lower coding rate, and the mobile terminal can receive correctly Information encoded at the rate of transmission.
  • the BS groups the MSs that receive the broadcast information according to the network planning situation in the broadcast system, and groups the MSs with the same channel quality into one group, and uses the same target coding rate for the MSs in the same group.
  • the base station 1 1 includes an encoding unit 110, a matching unit 1 12, and a transmitting unit 114.
  • the code list 110 is used for turbo coding of broadcast information.
  • the encoded information bits include systematic bits, first parity bits, and second parity bits.
  • the matching unit 1 12 is configured to obtain the basic information bits and the at least one incremental information bits from the encoded information bits according to the target coding rate.
  • the matching unit 112 may sort the target coding rates in the plurality of MSs, obtain the basic information bits from the encoded information bits with the highest target coding rate, and then, according to the remaining target codes.
  • the rate value magnitude in turn obtains corresponding incremental information bits from the encoded information bits.
  • the basic information bits may be obtained according to the constraint relationship between the original information bits and the basic information bits, and the constraint relationship between the original information bits and the basic information bits is the length of the original information bits.
  • the ratio of the length to the length of the basic information bits is equal to the target encoding rate at which the value is the highest.
  • the original information bit and the basic message may be
  • the constraint relationship between the information bits and the incremental information bits is used to obtain the incremental information bits
  • the constraint relationship between the original information bits and the basic information bits and the incremental information bits is the length of the original information bits and the length of the basic information bits and the incremental information.
  • the sum value of the sum is equal to the remaining target coding rate.
  • step S200 The procedure for obtaining the basic information bits and the at least one incremental information bits can be referred to step S200. The description will not be repeated here.
  • the transmitting unit 1 14 is configured to periodically transmit the basic information bits and the at least one incremental information bits to the MS on the time-frequency domain resources.
  • the BS may select a suitable time-frequency resource according to the current channel condition to transmit the basic information bit and the at least one incremental information bit, and may sequentially transmit the basic information bit and the at least one increase at a timing interval of every 4 ms. Information bits.
  • the timing interval can also be determined based on the time required for the MS to decode the basic information bits and the incremental information bits.
  • all MSs can receive basic information bits and incremental information bits.
  • FIG. 12 is a second structural diagram of a base station according to an embodiment of the present invention.
  • the base station 11 is configured to transmit multicast information.
  • the MSs in the multicast group first measure the quality of the base station to the respective downlink channels, and feed back the measurement result to the BS, and then according to the downlink.
  • the channel quality determines the target coding rate, and each MS in the multicast group is grouped, and the same target coding rate is used for the MSs in the same group.
  • the base station 12 includes an encoding unit 120, a matching unit 122, a transmitting unit 124, and a receiving unit 126.
  • the coding unit 120, the matching unit 122, and the transmitting unit 124 have the same functional structure as the coding unit 1 10, the matching unit 1 12, and the transmitting unit 114 in FIG. 11. The description is not repeated here.
  • the receiving unit 126 is configured to receive the decoding feedback flag sent by the MOS.
  • the adjusting unit 128 is configured to adjust a policy for transmitting information according to the decoding feedback result. In this embodiment, if, within a period of time, the adjusting unit 128 knows that all the MSs feed back the ACK after receiving the basic information bits, the notification sending unit 126 only needs to send the basic information bits, and does not need to send the information increment again. Information bits, on the one hand, can also save the occupied resources of the base station to send incremental information bits. If only a certain MS feeds back a NACK, the notification transmitting unit 126 can transmit a retransmission basic information bit and an incremental information bit for the MS.
  • the MS in the environment with good channel conditions only needs to receive the basic information bits to correctly decode, and when correctly decoded, it does not need to receive the incremental information bits. In this way, the MS in the environment with good channel conditions will not maintain the radio receiving state all the time, and there will be no redundancy, so that power consumption can be saved.
  • Handling MSs with poor information conditions or low or harsh environments because the MS can accept a lower target coding rate in this environment, and after receiving the basic information bits, it needs to receive one or more incremental information. Bit, then decode. When correctly decoded, there is no need to receive the incremental information bits, so that the MS in the environment with good channel conditions will not maintain the radio receiving state all the time, and there will be no redundancy, so that power consumption can be saved.
  • the BS can adjust the target coding rate according to the feedback condition of the MS, and re-acquire the basic information bit and the incremental information bit, if all the MSs receive the basic information bits after a period of time
  • the BS only needs to send the basic information bits, and does not need to send the information incremental information bits.
  • the occupied resources of the base station can also be saved to transmit the incremental information bits. For example, if only a certain MS feeds back a NACK, the BS may send a retransmission basic information bit and an incremental information bit for the MM.
  • FIG. 13 is a first structural diagram of a mobile terminal according to an embodiment of the present invention.
  • the mobile terminal 13 is applied to receive broadcast information transmitted by the base station.
  • the mobile terminal 13 includes a receiving unit 130 and a decoding unit 132.
  • the receiving unit 130 is configured to receive information bits sent by the base station.
  • the base station since the base station periodically transmits the basic information bits and the at least one incremental information bit on the time-frequency domain resource, the receiving unit 130 first receives the basic information bits at a time interval, and then, after a period of time, Receive incremental information bits.
  • the decoding unit 132 is configured to decode the received information bits within a determined time interval.
  • the determined time interval described herein is the same as the determined time interval of the sequential transmission of the base station. It may be 4 ms. Of course, the determined time interval may also be determined according to the time required for the MS to decode the basic information bits and the incremental information bits. In the present embodiment, 4ms is only an example, and those skilled in the art can adjust according to the actual channel network situation.
  • the decoding unit 132 is further configured to first determine whether decoding is needed, and if it is determined that decoding is required, decode the information bits received by the receiving unit 130. In this embodiment, the decoding unit 132 may set a corresponding decoding trigger threshold according to its own channel condition.
  • the receiving unit 130 Since the receiving unit 130 first receives the basic information bits, the basic information bits are first decoded, and if the decoding is successful within the determined time interval, the receiving unit 130 is notified to stop receiving. Information bits transmitted by the base station. In this embodiment, the incremental information bits obtained from the base station encoded information according to the target coding rate sequentially transmitted by the base station at the determined time interval are stopped. If the decoding cannot be successful, the receiving unit 130 is notified to continue receiving the incremental information bits transmitted by the base station, or the receiving unit 130 itself automatically continues to receive the information bits without notifying the receiving unit 130.
  • the receiving unit 130 After the receiving unit 130 receives the incremental bit information, if the decoding receiving 132 decodes the basic information bits and the received incremental information bits, if the decoding is successful, the receiving unit 130 is notified to stop receiving the information bits; if the decoding is unsuccessful, Then, the receiving unit 130 continues to receive the incremental information bits. At this time, the receiving unit 130 is further configured to determine whether the incremental information bits are received. In this embodiment, if it is determined that the incremental information bit is received for a long period of time, if not, the receiving unit 130 determines that the incremental information bit has been received. At this time, the MS receives the basic information sent by the BS. After the bit and increment information bits, the MS still cannot decode, and the MS can only end the receiving process. If it is determined that the incremental information bits are also receivable, the decoding unit 132 continues the decoding.
  • the MS if the MS receives the basic information bits, it can decode correctly, and does not need to receive the incremental information bits again, so that the radio receiving state is not always maintained, and no redundancy is generated, thereby saving power consumption. If the MS receives the basic information bits and part of the incremental basic information, it can decode correctly. It does not need to receive more incremental information bits, and it will not maintain the RF reception status all the time, and there will be no redundancy. , which can save power consumption.
  • FIG. 14 is a second structural diagram of a mobile terminal according to an embodiment of the present invention. In this embodiment, the figure
  • the receiving unit 140 and the decoding unit 142 in FIG. 14 have the same functional structure as the receiving unit 130 and the decoding unit 142 in FIG. 13, and the description thereof will not be repeated here.
  • the mobile terminal 14 is applied to receive multicast information transmitted by the base station.
  • a transmitting unit 144 is added in FIG. 14, and the transmitting unit 144 is configured to feed back an ACK signal to the base station after the decoding unit 142 successfully decodes.
  • the ACK signal is fed back to the BS to inform the MS that the multicast information sent by the BS can be successfully decoded without transmitting the remaining multicast information.
  • the sending unit 144 is further configured to: after the decoding unit 142 decodes the basic information bits and all the incremental information bits received by the receiving unit 140, the NACK signal is sent to the base station. That is, after the MS receives the basic information bits and the incremental information bits sent by the BS, the MS still cannot solve the solution. The code, the MS can only end the receiving process, and the BS can transmit the retransmission basic information bits and the incremental information bits for the MS.
  • the MS if the MS receives the basic information bits, it can decode correctly, and does not need to receive the incremental information bits again, so that the radio receiving state is not always maintained, and no redundancy is generated, thereby saving power consumption. If the MS receives the basic information bits and part of the incremental basic information, it can decode correctly. It does not need to receive more incremental information bits, and it will not maintain the RF reception status all the time, and there will be no redundancy. , which can save power consumption.
  • the BS can adjust the target coding rate according to the feedback condition of the MS, and re-acquire the basic information bit and the incremental information bit, if all the MSs receive the basic information bits after a period of time
  • the BS only needs to send the basic information bits, and does not need to send the information incremental information bits.
  • the occupied resources of the base station can also be saved to transmit the incremental information bits. If only a certain MS feeds back a NACK, the BS may send a retransmission basic information bit and an incremental information bit for the MM.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Description

一种根据目标编码速率传输信息的方法、 基站及移动终端 本申请要求于 2009年 11月 18日 提交中 国 专利局， 申请号为 200910109671.0, 发明名称为"一种根据目标编码速率传输信息的方法、 基站 及移动终端"的中国专利申请的优先权，其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信术领域， 尤其涉及一种根据目标编码速率传输信息 的方法、 基站及移动终端。 背景技木
在无线广播多播***中， 位于不同地点的移动终端的无线链路质量 是大不相同的， 一些移动终端与基站之间的信道条件相对较好， 而另一 些则十分恶劣。 基站为了兼顾本小区内大部分需要接收广播多播信息的 终端的接收能力， 通常只能根据小区信道质量较差的终端所能接受服务 质量设计编码速率， 然后， 再以设计后的编码速率向本小区所有的终端 传输信息。
在现有广播多播信息技术中， 第一移动终端距离基站较近， 信道条 件较好， 可以正确接收编码速率较髙的信号的概率较大， 而第二移动终 端距离基站较远， 信道条件较差， 正确解码编码速率较高的信号的概率 较小。 基站在发送的广播多播信息时， 为了兼顾第一移动终端和第二移 动终端都可以正确解码所接收的信号， 只能以第二移动终端可以接收的 编码速率进行传输信息。
发明人在实现本发明的过程中， 发现现有技术至少存在以下缺点： 由于基站以较低的编码速率传输信息， 会使所有需要接收广播多播信息 的移动终端必须一直保持射频接收状态， 直到要接收的广播多播信息传 输完毕为止， 这样不仅会增加移动终端的耗电量， 而且还会使距离基站 较近， 信道条件较好的移动终端接收到的广播多播信息存在大量冗余， 并接收效率低。 发明内容
本发明实施例提供一种根据目标编码速率传输信息的方法、 接收方 法、 基站及移动终端， 以节省移动终端的电量和减少冗余。
根据本发明的一方面， 提供一种根据目标编码速率传输信息的方法， 包括：
根据 ϋ标编码速率从基站编码后的信息中获得基本信息比特和至少 一个增量信息比特；
以确定的时间间隔依次传输所述基本信息比特和至少一个增量信息 比特至移动终端；
其中， 所迷目标編码速率是所述移动终端能够正确解码基站所传输 的信息时， 基站所釆用的编码速率。
根据本发明的另一方面， 还提供一种接收基站根据 标编码速率传 输信息的方法， 包括：
接收基站传输的根据目标编码速率从基站编码后的信息中获得的基 本信息比特；
在确定的时间间隔内， 若确定正确解码所述基本信息比特时， 停止 接收基站以所述确定的时间间隔依次传输的根据目标编码速率从基站编 码后的信息中获得的增量信息比特；
其中， 所述目标编码速率是所述移动终端能够正确解码基站所传输 的信息时， 基站所采用的编码速率。
根据本发明的另一方面， 还提供一种基站， 应用于根据目标编码速 率传输信息， 包括：
匹配单元， 用于根据目标编码速率从基站编码后的信息中获得基本 信息比特和至少一个增量信息比特；
发送单元， 用于以确定的时间间隔依次传输所述基本信息比特和至 少一个增量信息比特至移动终端；
其中， 所述目标编码速率是所述移动终端能够正确解码基站所传输 的信息时， 基站所采用的编码速率。 根据本发明的另一方面， 还提供一种移动终端， 包括：
接收单元， 用于接收基站传输的根据目标编码速率从基站编码后的 信息中获得的基本信息比特；
解码单元， 用于在确定的时间间隔内， 确定是否能正确解码所述基 本信息比特；
其中， 所述接收单元还用于当所述解码单元正确解码时， 停止接收 基站以所述确定的时间间隔依次传输的根据目标编码速率从基站编码后 的信息中获得的增量信息比特， 所述目标编码速率是所述移动终端能够 正确解码基站所传输的信息时， 基站所采用的编码速率。
本发明实施例提供的技术方案， 根据目标编码速率获得基本信息比 特和至少一个增量信息比特， 并传输至移动终端， 从而可以使移动终端 正确解码基本信息比特时， 就不需要再接收增量信息比特， 或正确解码 基本信息比特和至少一个增量信息比特时， 就不需要再接收剩余的增量 信息比特， 从而可以移动终端节省电量， 并减少存在的冗余。 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所 需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本发明 的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提 下， 还可以根据这些附图获得其他的附图。
图 1为本发明实施例的 turbo码的编码过程图；
图 2为本发明实施例的根据目标编码速率传输信息的方法的流程图； 图 3为本发明实施例中获得基本信息比特和增量信息比特的第一种 示意图；
图 4为本发明实施例中获得基本信息比特和增量信息比特的第二种 示意图；
图 5为本发明实施例中传输基本信息比特和增量信息比特的第一种 示意图；
图 6为本发明实施例中传输基本信息比特和增量信息比特的第一种 示意图； 图 7为本发明实施例中传输广播信息的示意图；
图 8为本发明实施例中传输多播信息的示意图；
图 9为本发明实施例的接收基站传输信息的方法的第一种流程图； 图 10本发明实施例的接收基站传输信息的方法的第二种流程； 图 1 1为本发明实施例的基站的第一种结构图；
图 12为本发明实施例的基站的第二种结构图；
图 13为本发明实施例的移动终端的第一种结构图；
图 14为本发明实施例的移动终端的第二种结构图。 具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清 楚、 完整地描迷， 显然， 所描迷的实施例仅仅是本发明一部分实施例， 而不是 全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
在本实施例中， 在无线通信中， 面对恶劣的无线信道条件， 为了保证 可先靠的信息传输， 移站 （BaseStat n , BS ) 需要对发送的信息进行编 码， 然后， 选择与信道条件相适应的编码速率对需要发送的信息进行编 码， 对编码后的信息比特再进行速率匹配， 也可以移之为打孔。
在本实施例中， 以对发送的信息进行 turbo码的编码为例进行说明， 如图 1所示。 图 1为 1/3编码速率的 turbo码的编码过程图。 在本实施例中， 编码后的信息包括三部分信息， 第一部分信息为输入的原始信息比特， 也可以称之为***比特； 第二部分信息为输入的原始信息比特经过分量 编码器 1编码后的输出信息， 也可以称之为校验比特 1或第一校验比特； 第三部分信息为输入的原始信息比特先进行交织后， 再经过分量编码器 2 编码后的输出信息， 也可以称之为校验比特 2或第二校验比特。 在本实施 例中， 该三个部分信息的比特数相等， 都等于输入的原始信息比特， 该 三个部分信息合起来作为 turbo码编码后的最终输出信息。
在本实施例中， 对 turbo码编码后的最终输出信息在传输前还需要进 行速率匹配， 来选择传输的信息比特。
图 2为本发明实施例的根据目标编码速率传输信息的方法的流程图。 在本实施例中，基站与多个移动终端通信连接， 多个移动终端处于不 同的信道条件环境中， 当然， 也存在处于同一信道条件环境中。 处于同 一信道条件环境下的移动终端， 移动终端可以正确的接收以相同或近似 相同的编码速率传输的信息， 基站可以采用此种环境下移动终端可以正 确接收的相同或近似相同的编码速率来传输信息， 在这种情况下的编码 速率移之为移动终端的目标编码速率。 对于处于信道条件很好环境下的 移动终端， 基站可以采用较高的编码速率传输信息至在这种信道条件很 好环境下的移动终端， 并且移动终端可以正确的接收以这种编码速率传 输的信息的概率比较大； 对于处于信道条件不好或很差环境下的移动终 端， 基站可以采用较低的编码速率传输信息至在这种信道很好环境下的 移动终端， 并且移动终端可以正确的接收以这种编码速率传输的信 , I,的 概率比较大。 所述目标编码速率是所述移动终端能够正确解码基站所传 输的信息时， 基站所釆用的编码速率。
在本实施例中， 步骤 S200， 基站根据移动终端 （ Mobile Station , MS ) 的目标编码速率从基站编码后的信息中获得基本信息比特和至少一个增 量信息比特； 也可以理解为， 根据目标编码速率来进行速率匹配， 从编 码后的信息获得基本信息比特和至少一个增量信息比特。
在本实施例中，基本信息比特是为了满足最高目标编码速率的要求而 在速率匹配过程中选择的部分信息比特， 增量信息比特是为满足其它目 标编码速率而在速度匹配过程中选择的部分信息比特。 在本实施例中， 选择基本信息比特和选择增量信息比特采用的是不同的目标编码速率。
在本实施例中，基本信息比特和增量信息比特的获得可以包括以下步 骤：
AA: 将 turbo码的编码后的三部分信息进行交织； 在本步骤中， 当基 站进行完 turbo码的编码后， 会产生三部分信息， 即***比特、 校验比特 1 及校验比特 2; 在交织的过程中， 将***比特进行交织， 再将校验比特 1 和校验比特 2进行交织；
BB: 将交织后的信息比特进行复制；
CC: 根据目标编码速率来获得基本信息比特； 在本步骤中， 可以将 多个 MS中的目标编码速率进行排序， 以值最高的目标编码速率从编码后 的信息比特中获得基本信息比特。
在本实施例中， 以基站与 6个 MS通信连接为例进行说明， 笫一 MS和 第二 MS处于相同或近似相同的信道奈件环境下， 此环境下的两者的目标 编码速率相同或近似相同， 可以为 V I； 第三 MS和第四 MS处于相同或近 似相同的信道条件环境下， 此环境下的两者的目标编码速率相同或近似 相同， 可以为 V2; 第五 MS和第六 MS处理相同或近似相同的信道条件环 境下， 此环境下的两者的目标编码速率相同或近似相同， 可以为 V3 ; 在 本实施例中， 假设 V1>V2>V3， 即 VI为最高目标编码速率；
在本实施例中， 以最高目标编码速率来获得基本信息比特， 即以 VI 来获得基本信息比特。 先计算出基本信息比特在交织后的信息比特中的 起始位； 再根据原始信息比特与基本信息比特的约束关系来获得基本信 息比特的长度。 在本实施例中， 原始信息比特与基本信息比特的约束关 系为原始信息比特的长度与基本信息比特的长度的比例值等于目标编码 速率 VI。 因此， 可以根据起始位置和长度从交织后的信息比特中获得基 本信息比特；
DD: 根据目标编码速率来获得至少一个增量信息比特； 在本实施例 中， 根据剩余的目标编码速率值大小依次从编码后的信息比特中获得相 应的增量信息比特。 由于 V1>V2， 因此， 针对第三 MS和第四 MS需要接收 基本信息比特和以 V2获得的增量信息比特。 在本实施例中， 可以紧接着 基本信息比特的中止位作为增量信息比特的起始位， 再根据原始信息比 特与基本信息比特及增量信息比特的约束关系来获得增量信息比特的长 度。 在本实施例中， 原始信息比特与基本信息比特及增量信息比特的约 束关系为原始信息比特的长度与基本信息比特和增量信息的长度和的比 例值等于目标编码速率 V2。 由于步骤 CC中已获得基本信息比特的长度， 因此， 可以根据上述的约束关系来获得增量信息比特的长度。 在本实施 例中， 由于第三 MS和第四 MS处于第二高的目标编码速率， 因此， 第三 MS和第四 MS只需要接收一个增量信息比特。
由于 V1>V2>V3， 因此， 针对第五 MS和第六 MS需要接收基本信息比 特、 以 V2获得的增量信息比特和以 V3获得的增量信息比特。 在本实施例 中， 可以紧接着 V2获得的增量信息比特的中止位作为以 V3获得的增量信 息比特的起始位， 再根据原始信息比特与基本信息比特、 V2获得的增量 信息比特及以 V3获得的增量信息比特的约束关系来获得增量信息比特的 长度。 在本实施例中， 原始信息比特与基本信息比特与基本信息比特、 V2获得的增量信息比特及以 V3获得的增量信息比特的约束关系为原始 信息比特的长度与基本信息比特、 以 V2获得的增量信息及以 V3获得的增 量信息的长度和的比例值等于目标编码速率 V3。 在本实施例中， 由于第 五 MS和第六 MS处于最低的^ I标编码速率， 因此， 笫五 MS和第六 MS需要 接收二个增量信息比特。
当还存在目标编码速率更多的情况时，可以根据上述的描述获得相应 的目标信息比特和多个增量信息比特。
在本实施例中，基本信息比特和增量信息比特的获得过程可以参考图
3和图 4。 在图 3中的 VI为 1/2， V2为 1/4， V3为 1/6; 图 4中的 VI为 2/3， V2 为 1/3， V3为 2/9。 当然， VI、 V2及 V3只是举例说明， 需要根据实际的网 络情况来获取相应的目标编码速率。
步骤 S202， 在时频域资源上按照确定的时间间隔依次传输基本信息 比特和至少一个增量信息比特至 MS。 在本实施例中， BS可以根据当前的 信道条件选择合适的时频资源来传输基本信息比特和至少一个增量信息 比特，并可以以每 4ms的确定的时间间隔依次传输基本信息比特和至少一 个增加信息比特。 当然， 该确定的时间间隔还可以根据 MS解码基本信息 比特和增量信息比特所需要的时间来确定。 在本实施例中， 4ms只是一个 例子， 本领域的技术人员可以根据实际的信道网络情况进行调整。 在本 实施例中， 在时频域资源上将基本信息比特和至少一个增量信息比特的 方式可以有多种， 可以参考图 5和图 6 , 图 5和图 6分別为其中的一种传输 方式。在图 6中，基本信息比特及增量信息比特分別占用不同的时间资源， 而且占用的频率资源的位置也是相互错开。
在本实施例中， 处于信道条件很好环境下的 MS只需要接收该基本信 息比特就可以正确解码， 当正确解码后， 就不用再接收增量信息比特， 这样处于信道条件很好环境下的 M S就不会一直保持射频接收状态， 并且 也不会有冗余产生， 从而可以节约耗电量。 处于信息条件不好或很低或 恶劣环境下的 MS， 由于此种环境下的 MS可以接受的目标编码速率比较 低， 当接收完基本信息比特后， 还需要再接收一个或多个增量信息比特， 然后再进行解码。 当正确解码后， 就不用再接收增量信息比特， 这样处 于信道条件很好环境下的 M S就不会一直保持射频接收状态， 并且也不会 有冗余产生， 从而可以节约耗电量。
在本实施例中，基站在传输信息时， 可以以广播或多播的形式来传输 信息。 下述将分别进行描述。
第一种： 当以广播的形式来传输信息时， BS根据广播***中的网络 规划情况， 把接收广播信息的 MS进行分組， 把信道质量相当的 MS分为一 组， 对同一组中的 MS采用相同的目标编码速率。 以图 7为例进行说明。 在图 5中， 以虚线为分割线， 虚线所包括范围内的 MS属于同一組， 即 MS 1 和 MS2为一组， MS3和 MS4为一组， MS5和 MS6为一组， 并三个组的目标 编码速率各不相同， 分别设为 VI、 V2、 V3 , 且依次降低， 即 V1>V2>V3。
BS对需要传输的广播信息进行 turbo码的编码后， 将编码后的信息比 特按 VI进行速率匹配， 以获得基本信息比特， 再按 V2和 V3进行速率匹配 后，分别产生增量信息比特 1和增量信息比特 2，此过程可以参考步骤 S200 及图 3、 图 4。
第二种， 当以多播的形式传输信息时， 首先， 先由多播組中的 MS各 自测量基站至各自的下行信道的质量， 并将测量结果反馈给 BS , BS再根 据下行信道质量确定目标编码速率， 及将多播组中的各个 MS分组， 对同 一组中的 MS采用相同的目标编码速率。 以图 8为例进行说明。 在图 8中， 存在 6个需要接收多播信息的 MS， BS根据下行信道的质量将 6个 MS进行 分组， MS 1和 MS4属于組 1， MS2和 MS6属于組 2， MS3和 MS5属于組 3， 并三个组的目标编码速率各不相同， 分别设为 VI、 V2、 V3 , 且依次降低， 即 V1>V2>V3。
BS对需要传输的多播信息进行 turbo码的编码后， 将编码后的信息比 特按 VI进行速率匹配， 以获得基本信息比特， 再按 V2和 V3进行速率匹配 后，分别产生增量信息比特 1和增量信息比特 2，此过程可以参考步骤 S200 及图 3、 图 4。 在多播***中， 基本信息比特块的长度和增量信息比特块 的长度可以相等， 也可以不相等， 但基本信息比特和增量信息比特块都 应该以***资源调度的基本单位为最小单位， 并基本信息比特和增量信 息比特块的长度为基本单位长度的整数倍。
B S在传输多播信息时， M S可以对 B S传输的基本信息比特和增量信息 比特能否正确解码作出反馈。 当 MS将解码结杲反馈给 BS后， BS可以根据 MS的反馈情况调整目标编码速率， 重新获取基本信息比特和增量信息比 特，如果在一段时间内，所有的 MS在都接收基本信息比特后都反馈 ACK, 则 BS只需要发送基本信息比特， 不需要再发送信息增量信息比特， 这样 一方面， 也可以节省基站的占用资源去发送增量信息比特。 如果只有某 个 MS反馈 NACK,则 BS可以针对该 MS发送重传基本信息比特和增量信息 比特。
在本实施例中， 由于基站可以传输广播或多播信息， 因此 MS也用不 同的接收过程， 区别点在于， 当基站传输广播信息时， MS没有不需要反 馈 ACK或 NACK; 当基站传输多播信息时， MS需要反馈 ACK或 NACK。 图 9为本发明实施例的接收基站传输信息的方法的第一种流程图， 即接收 广播信息时的流程图。
在本实施例中， 步骤 S900， 接收基本信息比特。 在本实施例中， 无 论是处于信道条件很好环境下， 还是处于信道条件不好环境下的 MS , 都 需要接收基本信息比特。
步骤 S902， 在确定的时间间隔内， 确定是否需要解码。 在本实施例 中， 此处所迷的确定的时间间隔与基站的依次传输的确定的时间间隔相 同。 可以为 4ms , 当然， 该确定的时间间隔还可以根据 MS解码基本信息 比特和增量信息比特所需要的时间来确定。 在本实施例中， 4ms只是一个 例子， 本领域的技术人员可以根据实际的信道网络情况进行调整。 在本 实施例中， MS可以根据自身的信道条件设定相应的解码触发阈值。 若当 前的信道条件大于设定的阈值时， 则执行步骤 S904 , 若当前的信道条件 不大于设定的阈值时， 则执行步骤 S910。 在本实施例中， MS还可以根据 编码速率， 编码交织块的大小或长度， 信道条件， 解码算法， 解码迭代 次数和 MS的服务质量等级等因素来设定解码触发阈值。 表 1所示为瑞利 衰落信道下， turbo编码交织器大小为 640， 采用 max-log-map算法解码情 况下， 保证 MS解码的误码率不大于 10·1时， 几种不^]编码速率对应的参 考解码触发阈值。 码率 1/4 1/2 2/3 3/4 4/5 1
门限 （dB) 0.58 2.39 5.36 8.52 9.04 9.69 12.31 表 1为 MS解码触发阔值
步骤 S904， 对接收的信息比特进行解码。 在本实施例中， 在确定的 时间间隔内， 对接收的基本信息比特进行解码。 当然， 也可以在确定的 时间间隔内， 对接收的基本信息比特和增量信息比特进行解码。
步骤 S606 , 在确定的时间间隔内， 确定解码是否成功。 在本实施例 中， 若解码成功后， 执行步骤 S908; 若解码不成功后， 执行步骤 S910。
步骤 S908， 终止接收基站发送的信息。 在本实施例中， 停止接收基 站以所述确定的时间间隔依次传输的根据目标编码速率从基站编码后的 信息中获得的增量信息比特。
执行步骤 S908后， MS结束整个接收流程。
步骤 S910 , 确定增量信息比特是否接收完。 在本实施例中， 若确定 增量信息比特接收完， 则说明 M S接收了 B S发送的基本信息比特和增量信 息比特后， MS还是不能解码， MS只能结束接收流程。 若确定增量信息比 特没有接收完， 则执行步骤 S912， 即说明 MS根据目前接收的基本信息比 特还不能成功解码， 需要增量信息比特来解码， 或根据目前接收的基本 信息比特和部分的增量信息比特还不能成功解码， 需要更多的增量信息 比特来来解码。
步骤 S912 , 接收增量信息比特。
执行步骤 S912后， 继续执行步骤 S902。
在本实施例中， 若 MS接收基本信息比特后， 就可以正确解码， 不需 要再接收增量信息比特， 这样就不会一直保持射频接收状态， 并且也不 会有冗余产生， 从而可以节约耗电量。 如果 MS接收基本信息比特和部分 的增量基本信息后， 就可以正 确解码， 就不需要再接收更多的增量信 息比特， 就不会一直保持射频接收状态， 并且也不会有冗余产生， 从而 可以节约耗电量。
图 10为本发明实施例的接收基站传输信息的方法的第二种流程图，即 接收多播信息时的流程图。
在本实施例中， 步骤 S 1000 , 接收基本信息比特。 在本实施例中， 无 论是处于信道条件很好环境下， 还是处于信道条件不好环境下的 MS， 都 需要接收基本信息比特。
步骤 S 1002 , 在确定的时间间隔内， 确定是否需要解码。
步骤 S 1004 , 对接收的信息比特进行解码。 在本实施例中， 在确定的 时间间隔内， 对接收的基本信息比特进行解码。 当然， 也可以对接收的 基本信息比特和增量信息比特进行解码。
步骤 S 1006 , 在确定的时间间隔内， 确定解码是否成功。 在本实施例 中， 若解码成功后， 执行步骤 S 1008; 若解码不成功后， 执行步骤 S1012。
步骤 S 1008 , 反馈 ACK信号至 BS。 在本实施例中， 反馈 ACK信号至 BS， 以告知 MS可以成功解码 BS发送的多播信息， 不用再发送剩余的多播 信息。
并执行步骤 S 1 100， 终止接收多 信息。 并结束整个接收流程。
步骤 S 1 12 , 确定增量信息比特是否接收完。 在本实施例中， 若确定 增量信息比特接收完， 则执行步骤 S 1014 , 反馈 NACK信号给 BS， 即说明 MS接收了 B S发送的基本信息比特和增量信息比特后， M S还是不能解码， MS只能结束接收流程， 并 BS可以针对该 MS发送重传基本信息比特和增 量信息比特。 若确定增量信息比特没有接收完， 则执行步骤 S 1016 , 即说 明 MS根据目前接收的基本信息比特还不能成功解码， 需要增量信息比特 来解码， 或根据目前接收的基本信息比特和部分的增量信息比特还不能 成功解码， 需要更多的增量信息比特来来解码。
步骤 S 1016 , 接收增量信息比特。
执行步骤 S 1016后， 执行步骤 S1002。
在本实施例中， 若 MS接收基本信息比特后， 就可以正确解码， 不需 要再接收增量信息比特， 这样就不会一直保持射频接收状态， 并且也不 会有冗余产生， 从而可以节约耗电量。 如果 MS接收基本信息比特和部分 的增量基本信息后， 就可以正 确解码， 就不需要再接收更多的增量信 息比特， 就不会一直保持射频接收状态， 并且也不会有冗余产生， 从而 可以节约耗电量。
当 MS将解码结杲反馈给 BS后， BS可以根据 MS的反馈情况调整目标 编码速率， 重新获取基本信息比特和增量信息比特， 如果在一段时间内， 所有的 MS在都接收基本信息比特后都反馈 ACK，则 BS只需要发送基本信 息比特， 不需要再发送信息增量信息比特， 这样一方面， 也可以节省基 站的占用资源去发送增量信息比特。 如果只有某个 MS反馈 NACK, 则 BS 可以针对该 M S发送重传基本信息比特和增量信息比特。
图 1 1为本发明实施例的基站的第一种结构图。在本实施例中， 该基站 1 1为传输广播信息， 该基站可以与多个 MS通信连接， 多个移动终端处于 不同的信道条件环境中， 当然， 也存在处于同一信道条件环境中。 处于 同一信道条件环境下的移动终端， 移动终端可以正确的接收以相同的编 码速率传输的信息， 基站可以采用此种环境下移动终端可以正确接收的 相同的编码速率来传输信息， 在这种情况下的编码速率移之为移动终端 的目标编码速率。 对于处于信道条件很好环境下的移动终端， 基站可以 采用较高的编码速率传输信息至在这种信道条件很好环境下的移动终 端， 并且移动终端可以正确的接收以这种编码速率传输的信息； 对于处 于信道条件不好或很差环境下的移动终端， 基站可以采用较低的编码速 率传输信息至在这种信道很好环境下的移动终端， 并且移动终端可以正 确的接收以这种编码速率传输的信息。
在本实施例中， BS根据广播***中的网络规划情况， 把接收广播信 息的 MS进行分组， 把信道质量相当的 MS分为一组， 对同一組中的 MS采 用相同的目标编码速率。
基站 1 1包括编码单元 110、 匹配单元 1 12及发送单元 1 14。 在本实施例 中， 编码单无 110用于对广播信息进行 turbo编码。 在本实施例中， 编码后 的信息比特包括***比特、 第一校验比特和第二校验比特。
匹配单元 1 12用于根据目标编码速率从编码后的信息比特中获得基本 信息比特和至少一个增量信息比特。 在本实施例中， 匹配单元 1 12可以将 多个 MS中的目标编码速率进行排序， 以值最高的目标编码速率从编码后 的信息比特中获得基本信息比特， 其次， 再根据剩余的目标编码速率值 大小依次从编码后的信息比特中获得相应的增量信息比特。 在本实施例 中， 可以根据所述原始信息比特与所述基本信息比特的约束关系来获得 所迷基本信息比特， 所迷原始信息比特与基本信息比特的约束关系为所 述原始信息比特的长度与基本信息比特的长度的比例值等于所述值最高 的目标编码速率。 在本实施例中， 可以根据所述原始信息比特与基本信 息比特及增量信息比特的约束关系来获得增量信息比特， 所述原始信息 比特与基本信息比特及增量信息比特的约束关系为原始信息比特的长度 与基本信息比特和增量信息的长度之和的比例值等于所迷剩余的目标编 码速率。
有关具体的获得基本信息比特和至少一个增量信息比特的过程可以 参考步骤 S200。 此处不再重复描述。
发送单元 1 14用于在时频域资源上定时依次传输基本信息比特和至少 一个增量信息比特至 MS。 在本实施例中， BS可以根据当前的信道条件选 择合适的时频资源来传输基本信息比特和至少一个增量信息比特， 并可 以以每 4ms的定时时间间隔依次传输基本信息比特和至少一个增加信息 比特。 当然， 该定时时间间隔还可以根据 MS解码基本信息比特和增量信 息比特所需要的时间来确定。 在本实施例中， 所有 MS都可以接收到基本 信息比特和增量信息比特。
图 12为本发明实施例的基站的第二种结构图。在本实施例中， 该基站 1 1为传输多播信息， 此时， 先由多播组中的 MS各自测量基站至各自的下 行信道的质量， 并将测量结果反馈给 BS , BS再根据下行信道质量确定目 标编码速率，及将多播组中的各个 MS分組，对同一组中的 MS采用相同的 目标编码速率。
基站 12包括编码单元 120、匹配单元 122、发送单元 124及接收单元 126。 在本实施例中， 编码单元 120、 匹配单无 122、 发送单元 124与图 1 1中的编 码单元 1 10、 匹配单元 1 12及发送单元 114的功能结构相同， 此处不再重复 描述。 接收单元 126用于接收 M S发送的解码反馈结杲。
调整单元 128用于根据解码反馈结果调整传输信息的策略。 在本实施 例中， 如果在一段时间内， 调整单元 128得知所有的 MS在都接收基本信 息比特后都反馈 ACK， 则通知发送单元 126只需要发送基本信息比特， 不 需要再发送信息增量信息比特， 这样一方面， 也可以节省基站的占用资 源去发送增量信息比特。 如果只有某个 MS反馈 NACK， 则通知发送单元 126可以针对该 MS发送重传基本信息比特和增量信息比特。
在本实施例中， 处于信道条件很好环境下的 MS只需要接收该基本信 息比特就可以正确解码， 当正确解码后， 就不用再接收增量信息比特， 这样处于信道条件很好环境下的 MS就不会一直保持射频接收状态， 并且 也不会有冗余产生， 从而可以节约耗电量。 处理信息条件不好或很低或 恶劣环境下的 MS， 由于此种环境下的 MS可以接受的目标编码速率比较 低， 当接收完基本信息比特后， 还需要再接收一个或多个增量信息比特， 然后再进行解码。 当正确解码后， 就不用再接收增量信息比特， 这样处 于信道条件很好环境下的 M S就不会一直保持射频接收状态， 并且也不会 有冗余产生， 从而可以节约耗电量。
当 MS将解码结果反馈给 BS后， BS可以根据 MS的反馈情况调整目标 编码速率， 重新获取基本信息比特和增量信息比特， 如果在一段时间内， 所有的 MS在都接收基本信息比特后都反馈 ACK,则 BS只需要发送基本信 息比特， 不需要再发送信息增量信息比特， 这样一方面， 也可以节省基 站的占用资源去发送增量信息比特。 如杲只有某个 MS反馈 NACK， 则 BS 可以针对该 M S发送重传基本信息比特和增量信息比特。
图 13为本发明实施例的移动终端的第一种结构图。在本实施例中，移 动终端 13应用于接收基站传输的广播信息。
在本实施例中， 移动终端 13包括接收单元 130和解码单元 132。 在本实 施例中， 接收单元 130用于接收基站发送的信息比特。 在本实施例中， 由 于基站在时频域资源上定时依次传输基本信息比特和至少一个增量信息 比特， 因此， 接收单元 130在开始的时候， 先接收基本信息比特， 隔一个 时间段， 再接收增量信息比特。
解码单元 132用于在确定的时间间隔内， 对所接收的信息比特进行解 码。 在本实施例中， 此处所述的确定的时间间隔与基站的依次传输的确 定的时间间隔相同。 可以为 4ms， 当然， 该确定的时间间隔还可以根据 M S解码基本信息比特和增量信息比特所需要的时间来确定。 在本实施例 中， 4ms只是一个例子， 本领域的技术人员可以根据实际的信道网络情况 进行调整。 在本实施例中， 解码单元 132还用于先确定是否需要解码， 若 确定需要解码时， 对接收单元 130接收的信息比特进行解码。 在本实施例 中， 解码单元 132可以根据自身的信道条件设定相应的解码触发阈值。 由 于接收单元 130先接收基本信息比特， 因此， 先对该基本信息比特进行解 码， 在确定的时间间隔内， 若能解码成功， 则通知接收单元 130停止接收 基站传输的信息比特。 在本实施例中， 停止接收基站以所述确定的时间 间隔依次传输的根据目标编码速率从基站编码后的信息中获得的增量信 息比特。 若不能解码成功， 则通知接收单元 130继续接收基站传输的增量 信息比特， 或是不用通知接收单元 130， 接收单元 130本身会自动的继续 接收信息比特。 当接收单元 130接收了增量比特信息后， 若解码接收 132 将基本信息比特和接收的增量信息比特进行解码， 若能解码成功， 则通 知接收单元 130停止接收信息比特； 若解码不成功， 则通知接收单元 130 继续接收增量信息比特， 此时， 接收单元 130还用于确定增量信息比特是 否接收完。 在本实施例中， 若很长一段时间内， 确定有没有接收到增量 信息比特， 若没有， 则接收单元 130确定增量信息比特已接收完， 此时， MS接收了 B S发送的基本信息比特和增量信息比特后， M S还是不能解码， MS只能结束接收流程。若确定还可以接收增量信息比特， 则解码单元 132 继续进行解码。
在本实施例中， 若 MS接收基本信息比特后， 就可以正确解码， 不需 要再接收增量信息比特， 这样就不会一直保持射频接收状态， 并且也不 会有冗余产生， 从而可以节约耗电量。 如果 MS接收基本信息比特和部分 的增量基本信息后， 就可以正 确解码， 就不需要再接收更多的增量信 息比特， 就不会一直保持射频接收状态， 并且也不会有冗余产生， 从而 可以节约耗电量。
图 14为本发明实施例的移动终端的第二种结构图。在本实施例中， 图
14中的接收单元 140、解码单元 142与图 13中的接收单元 130、解码单元 142 的功能结构相同， 此处不再重复描述。 在本实施例中， 移动终端 14应用 于接收基站传输的多播信息。
不同的是， 图 14中增加一个发送单元 144， 该发送单元 144用于当解码 单元 142解码成功后， 反馈 ACK信号至基站。 在本实施例中， 反馈 ACK信 号至 BS , 以告知 MS可以成功解码 BS发送的多播信息， 不用再发送剩余的 多播信息。
发送单元 144还用于 解码单元 142将接收单元 140所接收基本信息比 特和所有增量信息比特进行解码不成功后， 发送 NACK信号至基站。 即说 明 MS接收了 BS发送的基本信息比特和增量信息比特后， MS还是不能解 码， MS只能结束接收流程， 并 BS可以针对该 MS发送重传基本信息比特 和增量信息比特。
在本实施例中， 若 MS接收基本信息比特后， 就可以正确解码， 不需 要再接收增量信息比特， 这样就不会一直保持射频接收状态， 并且也不 会有冗余产生， 从而可以节约耗电量。 如果 MS接收基本信息比特和部分 的增量基本信息后， 就可以正 确解码， 就不需要再接收更多的增量信 息比特， 就不会一直保持射频接收状态， 并且也不会有冗余产生， 从而 可以节约耗电量。
当 MS将解码结果反馈给 BS后， BS可以根据 MS的反馈情况调整目标 编码速率， 重新获取基本信息比特和增量信息比特， 如果在一段时间内， 所有的 MS在都接收基本信息比特后都反馈 ACK,则 BS只需要发送基本信 息比特， 不需要再发送信息增量信息比特， 这样一方面， 也可以节省基 站的占用资源去发送增量信息比特。 如果只有某个 MS反馈 NACK, 则 BS 可以针对该 M S发送重传基本信息比特和增量信息比特。
本领域普通技术人员可以理解实现上迷实施例方法中的全部或部分 流程， 是可以通过计算机程序来指令相关的硬件来完成， 所述的程序可 存储于一计算机可读取存储介质中， 该程序在执行时， 可包括如上述各 方法的实施例的流程。 其中， 所述的存储介质可为磁碟、 光盘、 只读存 储记忆体（ Read-Only Memory, ROM )或随机存储记忆体（ Random Access Memory, RAM ) 等。
最后应说明的是：以上实施例仅用以说明本发明的技术方案而非对其 进行限制， 尽管参照较佳实施例对本发明进行了详细的说明， 本领域的 普通技术人员应当理解： 其依然可以对本发明的技术方案进行修改或者 等同替换， 而这些修改或者等同替换亦不能使修改后的技术方案脱离本 发明技术方案的精神和范围。

Claims

权 利 要 求
1、 一种根据目标编码速率传输信息的方法， 其特征在于， 包括： 根据目标编码速率从基站编码后的信息中获得基本信息比特和至少 一个增量信息比特；
以确定的时间间隔依次传输所述基本信息比特和至少一个增量信息 比特至移动终端；
其中，所述目标编码速率是所述移动终端能够正确解码基站所传输的 信息时， 基站所采用的编码速率。
2、 根据权利要求 1所述的方法， 其特征在于， 还包括：
所述基本信息比特是为了满足最高目标编码速率的要求选择的信息 比特。
3、 根据权利要求 1所述的方法， 其特征在于， 还包括： 所述增量信息 比特是为满足其它目标编码速率选择的信息比特。
4、 根据权利要求 1所述的方法， 其特征在于， 所迷根据目标编码速率 从基站编码后的信息中获得基本信息比特和至少一个增量信息比特的步 骤包括：
获取多个移动终端的目标编码速率；
根据所迷多个移动终端的目标编码速中，值最高的 ϋ标编码速率获得 所述基本信息比特；
根据所述多个移动终端的目标编码速中，剩余的目标编码速率获得至 少一个增量信息比特。
5、 根据权利要求 4所述的方法， 其特征在于， 所述根据值最高的目标 编码速率获得所迷基本信息比特的步骤包括：
将需要传输的原始信息比特进行 turbo码的编码；
将编码后的信息进行交织；
从交织后的信息中，根据所述原始信息比特与所述基本信息比特的约 束关系来获得所述基本信息比特， 所迷原始信息比特与基本信息比特的 约束关系为所述原始信息比特的长度与基本信息比特的长度的比例值等 于所述值最高的目标编码速率。
6、 根据权利要求 4所述的方法， 其特征在于， 所述根据剩余的目标编 码速率获得至少一个增量信息比特的步骤包括：
将需要传输的原始信息比特进行 turbo码的编码；
将编码后的信息进行交织；
从交织后的信息中，根据所述原始信息比特与基本信息比特及增量信 息比特的约束关系来获得增量信息比特， 所述原始信息比特与基本信息 比特及增量信息比特的约束关系为原始信息比特的长度与基本信息比特 和增量信息的长度之和的比例值等于所述剩余的目标编码速率。
7、 根据权利要求 1所述的方法， 其特征在于， 还包括：
若接收所述移动终端发送的 ACK信号时， 停止传输增量信息比特。
8、 根据权利要求 1所述的方法， 其特征在于， 还包括：
若没有接收到所迷移动终端发送的 ACK信号时， 传输完所有的增量 信息比特。
9、 一种接收基站根据目标编码速率传输信息的方法， 其特征在于， 包括：
接收基站传输的根据目标编码速率从基站编码后的信息中获得的基 本信息比特；
在确定的时间间隔内， 若确定正确解码所述基本信息比特时，停止接 收基站以所迷确定的时间间隔依次传输的根据目标编码速率从基站编码 后的信息中获得的增量信息比特；
其中，所述目标编码速率是所述移动终端能够正确解码基站所传输的 信息时， 基站所采用的编码速率。
10、 根据权利要求 9所述的方法， 其特征在于， 还包括：
在确定的时间间隔内， 若确定正确解码所迷基本信息比特时， 发送 ACK信号至基站， 以通知基站停止传输增量信息比特。
1 1、 根据权利要求 9所述的方法， 其特征在于， 还包括：
在确定的时间间隔内， 当不能正确解码所述基本信息比特时，接收基 站以所述确定的时间间隔依次传输的根据目标编码速率从基站编码后的 信息中获得的至少一个增量信息比特。
12、 根据权利要求 11所述的方法， 其特征在于， 还包括： 在确定的时间间隔内，确定能正确解码所述基本信息比特和至少一个 增量信息比特时， 停止接收基站发送的剩余的增量信息比特。
13、 根据权利要求 12所迷的方法， 其特征在于， 还包括： 在确定的时间间隔内，确定正确解码所述基本信息比特和至少一个增 量信息比特时， 发送 ACK信号至基站， 以通知基站停止传输剩余的增量 信息比特。
14、 一种基站， 其特征在于， 应用于根据目标编码速率传输信息， 包 括：
匹配单元，用于根据目标编码速率从基站编码后的信息中获得基本信 息比特和至少一个增量信息比特；
发送单元，用于以确定的时间间隔依次传输所述基本信息比特和至少 一个增量信息比特至移动终端；
其中，所述目标编码速率是所迷移动终端能够正确解码基站所传输的 信息时， 基站所釆用的编码速率。
15、 根据权利要求 14所述的基站， 其特征在于， 所述匹配单元进一步 用于获取多个移动终端的目标编码速率， 根据所述多个移动终端的目标 编码速中， 值最高的目标编码速率获得所述基本信息比特， 根据剩余的 目标编码速率获得至少一个增量信息比特。
16、 根据权利要求 15所迷的基站， 其特征在于， 所迷匹配单元包括： 编码单无， 用于将需要传输的原始信息比特进行 turbo码的编码， 并 将编码后的信息进行交织；
所迷匹配单元，还用于从交织后的信息中，根据所述原始信息比特与 所述基本信息比特的约束关系来获得所述基本信息比特， 所述原始信息 比特与基本信息比特的约束关系为所迷原始信息比特的长度与基本信息 比特的长度的比例值等于所述值最高的目标编码速率。
17、 根据权利要求 15所述的基站， 其特征在于， 所述匹配单元还用于 从交织后的信息中， 根据剩余的目标编码速率选择与所述剩余的目标编 码速率对应的移动终端能够正确解码的信息比特， 根据所述原始信息比 特与基本信息比特及增量信息比特的约束关系来获得增量信息比特， 所 述原始信息比特与基本信息比特及增量信息比特的约束关系为原始信息 比特的长度与基本信息比特和增量信息的长度之和的比例值等于所述剩 余的目标编码速率。
18、 根据权利要求 14所迷的基站， 其特征在于， 还包括：
接收单元， 用于接收所述移动终端发送的 ACK信号；
所述发送单元， 还用于当所述接收单元接收所述移动终端发送的
ACK信号时， 停止传输增量信息比特。
19、 一种移动终端， 其特征在于， 包括：
接收单元，用于接收基站传输的根据目标编码速率从基站编码后的信 息中获得的基本信息比特；
解码单元， 用于在确定的时间间隔内，确定是否能正确解码所述基本 信息比特；
其中， 所迷接收单元还用于当所迷解码单元正确解码时，停止接收基 站以所述确定的时间间隔依次传输的根据目标编码速率从基站编码后的 信息中获得的增量信息比特， 所述目标编码速率是所述移动终端能够正 确解码基站所传输的信息时， 基站所采用的编码速率。
20、 根据权利要求 19所述的移动终端， 其特征在于， 所述接收单元还 用于当所述解码单元在确定的时间间隔内， 不能正确解码时， 接收基站 以所述确定的时间间隔依次传输的根据目标编码速率从基站编码后的信 息中获得的至少一个增量信息比特。
21、 根据权利要求 20所述的移动终端， 其特征在于，
所述解码单元，还用于在确定的时间间隔内， 确定是否能正确解码所 述基本信息比特和至少一个增量信息比特。
所述接收单元， 还用于在确定的时间间隔内， 确定正确解码时， 停止 接收基站以所迷确定的时间间隔依次发送的剩余的增量信息比特。
22、 根据权利要求 19或 21所述的移动终端， 其特征在于， 还包括： 发送单元， 用于在确定的时间间隔内， 当确定正确解码时 , 发送 ACK 信号至基站， 以通知基站停止传输剩余的增量信息比特。
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