WO2016000347A1 - 控制信息的传输方法及装置 - Google Patents

控制信息的传输方法及装置 Download PDF

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Publication number
WO2016000347A1
WO2016000347A1 PCT/CN2014/088427 CN2014088427W WO2016000347A1 WO 2016000347 A1 WO2016000347 A1 WO 2016000347A1 CN 2014088427 W CN2014088427 W CN 2014088427W WO 2016000347 A1 WO2016000347 A1 WO 2016000347A1
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Prior art keywords
control information
repetition
level
information
levels
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PCT/CN2014/088427
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English (en)
French (fr)
Inventor
石靖
戴博
夏树强
刘锟
陈宪明
方惠英
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中兴通讯股份有限公司
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Publication of WO2016000347A1 publication Critical patent/WO2016000347A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for transmitting control information.
  • Machine Type Communication (MTC) User Terminal (User Equipment or Terminal), also known as Machine to Machine (M2M) user communication equipment
  • MTC Machine Type Communication
  • M2M Machine to Machine
  • LTE Long-Term Evolution
  • LTE-Advance Long-Term Evolution Advance
  • MTC multi-class data services based on LTE/LTE-A will also be more attractive.
  • the existing LTE/LTE-A system is transmitted based on dynamic scheduling of each subframe, that is, each subframe can transmit different control channels.
  • a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) and an Enhanced Physical Downlink Control Channel (EPDCCH) are defined in LTE/LTE-A.
  • the information carried by the Physical Control Format Indicator Channel (PCFICH) is used to indicate the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols for transmitting the PDCCH in one subframe.
  • a Physical Hybrid-Review (ARQ) indicator channel (Physical Hybrid-ARQ Indicator Channel, abbreviated as PHICH) is used to carry acknowledgement/negative acknowledgement (ACK/NACK) feedback information of uplink transmission data.
  • the downlink control channel adopts blind detection, and the terminal attempts to demodulate the downlink control channel with different aggregation levels and candidate sets in a certain search space.
  • the existing UE-specific search space is as shown in Table 1 and Table 2.
  • the search space is composed of candidate sets corresponding to different aggregation levels.
  • the PDCCH/EPDCCH is used to carry downlink control information (Downlink Control Information, DCI for short), and includes: uplink and downlink scheduling information, and uplink power control information.
  • Downlink Control Information Downlink Control Information
  • uplink and downlink scheduling information includes: uplink and downlink scheduling information, and uplink power control information.
  • the MTC terminal can obtain the DCI by demodulating the PDCCH/EPDCCH channel in each subframe, so as to implement demodulation of the Physical Downlink Share Channel (PDSCH) and Physical Uplink Share Channel (Physical Uplink Share Channel). Scheduling indication information for PUSCH).
  • PDSCH Physical Downlink Share Channel
  • Physical Uplink Share Channel Physical Uplink Share Channel
  • MTC application terminal there is a type of terminal whose coverage performance is significantly degraded due to the limited location or its own characteristics.
  • smart meter reading MTC terminals are mostly installed in a low coverage performance environment such as a basement. They mainly send packet data, have low data rate requirements, and can tolerate large data transmission delays. Since such terminals have low data rate requirements, for the data channel, the correct transmission of the packet data can be ensured by a lower modulation and coding rate and multiple repeated transmissions in the time domain.
  • the maximum number of blind detections increases exponentially with the number of repeated subframes, so it is necessary to limit the blind detection path.
  • a common method of limiting blind detection paths uses the same aggregation level and the same candidate set for each subframe. Since the number of repeated transmissions is not necessarily a fixed value, for example, the coverage performance changes due to channel conditions or terminal location changes, and the number of times of using repeated transmissions also changes, so that the terminal not only detects different aggregation levels when receiving detection control information. There is also the problem of detecting the number of repetitions, which in turn requires determining the location of the business information indicated by the control information. Therefore, it is necessary to further design the reception detection during repeated transmission.
  • the MTC terminal with enhanced coverage in the case of different repetition times transmission in the related art cannot correctly receive the problem of detecting the control channel, and there is currently no effective solution.
  • the embodiment of the invention provides a method and a device for transmitting control information to solve at least the above problems.
  • a method for transmitting control information including: determining, by a base station, a resource for repeatedly transmitting control information according to predefined information, where the predefined information includes at least one of the following: an overlay level And repeating the level/number of times, the aggregation level; the base station repeatedly transmitting the control information on the determined resource.
  • the repetition level/number of times and the aggregation level satisfy at least one of the following relationships: a product of an aggregation level and a repetition level/number of times is a fixed value, and the fixed value corresponds to a coverage level;
  • the one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple aggregation levels, one aggregation level corresponds to one repetition level/number of times, wherein the repetition levels/numbers corresponding to different aggregation levels are not all the same
  • one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple repetition levels/numbers, one repetition level/number corresponds to one aggregation level, wherein different repetition levels/ The aggregation levels corresponding to the number of times are not all the same; in the case of multiple repetition levels/numbers, one repetition level/number of times corresponds to multiple aggregation levels.
  • the determining, by the base station, the resource for repeatedly transmitting the control information according to the predefined information the determining, by the base station, the resource that repeatedly sends the control information according to the first predefined information, in the access process of the user equipment, where The repetition level/number of times and the aggregation level in the first predefined information satisfy one of the relationships; after establishing an RRC connection with the user equipment, the base station determines, according to the second predefined information, the resource that repeatedly sends the control information, The repetition level/number of times and the aggregation level in the second predefined information satisfy one of the relationships.
  • the method further includes: the base station adding padding bits to the control information to be sent in different repetition times, where different The size of the control information transmitted by the number of repetitions is different.
  • the base station repeatedly transmits the control information on the determined resource, and at least according to the repetition level/time number scrambling Control information.
  • the scrambling code added by scrambling the control information/the other information on each subframe remains the same; and/or Base station repeat transmission except control
  • the scrambling code added by scrambling the other information on each subframe is different in each subframe in the group of one subframe, and the same is used among the multiple subframe groups Scrambling code configuration.
  • the base station further scrambles the control information according to at least a radio frame number.
  • the scrambling code c init of the base station to scramble the control information is determined according to the following formula: or
  • each sub-frame k of the repeated transmission is k 0 , k 0 +1, ..., k 0 + N-1
  • SFN is the radio frame number of the subframe in which k 0 is located, and h is in the radio frame.
  • the number of available downlink subframes, N is the number of repeated transmissions. Indicates the cell identification code.
  • the base station scrambles the control information according to the repetition level/time number at least: the base station calculates different scrambling code initial values c init according to at least the different repetition levels/number of times.
  • the initial value of the scrambling code c init of the base station to scramble the control information is determined according to the following formula: or among them, or C is a constant, and each sub-frame k of repeated transmission is k 0 , k 0 +1, ..., k 0 + N-1, SFN is the radio frame number of the subframe in which k 0 is located, and h is available in the radio frame.
  • the number of downlink subframes, N is the number of repeated transmissions, m and k are natural numbers, and N RL is the value of the repetition level/number of times. Indicates the cell identification code.
  • the base station scrambles the control information according to the repetition level/time number at least: the base station intercepts the scrambling code c(n) of the different location according to different repetition levels/times.
  • the control information is cyclically shifted.
  • the base station when the base station sends the control information on the resource, the first location of the starting subframe of the multiple subframes occupied by the service information indicated by the control information, and the control information
  • the distance of the second position of the starting subframe is a fixed value, or the distance between the first location and the second location is indicated by high layer signaling, wherein the fixed value is not less than the repetition number of the control information.
  • a method for transmitting control information including: determining, by a user equipment, a resource that repeatedly receives control information according to predefined information, where the predefined information includes at least one of the following: : coverage level, repetition level/number of times, aggregation level; the user equipment repeatedly receives the control information on the determined resource.
  • the repetition level/number of times and the aggregation level satisfy at least one of the following relationships: a product of an aggregation level and a repetition level/number of times is a fixed value, and the fixed value corresponds to a coverage level;
  • the one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple aggregation levels, one aggregation level corresponds to one repetition level/number of times, wherein the repetition levels/numbers corresponding to different aggregation levels are not all the same
  • one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple repetition levels/numbers, one repetition level/number corresponds to one aggregation level, wherein different repetition levels/ The aggregation levels corresponding to the number of times are not all the same; in the case of multiple repetition levels/numbers, one repetition level/number of times corresponds to multiple aggregation levels.
  • the method further includes: determining, by the user equipment, the bit field according to the received control information, determining the The repetition level/number of times used by the control information, wherein the size of the control information received by the different repetition times is different in size by being added with padding bits.
  • the user equipment descrambles at least according to the repetition level/time in case that the control information is repeatedly received on the determined resource.
  • the control information is repeatedly received on the determined resource.
  • the scrambling code used to descramble the control information/the other information in each subframe remains the same; and/or In the case where the user equipment repeatedly transmits other information than the control information, the scrambling code used to descramble the other information in each subframe is different in each subframe in the group in a group of subframes, and The same scrambling code configuration is used between multiple groups of subframe groups.
  • the user equipment further descrambles the control information according to at least a radio frame number.
  • the scrambling code c init of the user equipment to descramble the control information is determined according to the following formula:
  • each sub-frame k of the repeated transmission is k 0 , k 0 +1, ..., k 0 + N-1
  • SFN is the radio frame number of the subframe in which k 0 is located, and h is in the radio frame.
  • the number of available downlink subframes, N is the number of repeated transmissions. Indicates the cell identification code.
  • the user equipment descrambles the control information according to the repetition level/time number at least: the user equipment calculates different scrambling code initial values c init according to at least the different repetition levels/number of times.
  • the initial value of the scrambling code c init of the user equipment to descramble the control information is determined according to the following formula: or among them, or C is a constant, and each sub-frame k of repeated transmission is k 0 , k 0 +1, ..., k 0 + N-1, SFN is the radio frame number of the subframe in which k 0 is located, and h is available in the radio frame.
  • the number of downlink subframes, N is the number of repeated transmissions, m and k are natural numbers, and NRL is the value of the repetition level/number of times. Indicates the cell identification code.
  • the user equipment station descrambles the control information according to the repetition level/time number at least: the user equipment intercepts the scrambling code c(n) of the different location according to different repetition levels/times.
  • the control information is de-cyclically shifted.
  • the user equipment receives the control information on the resource, the first location of the starting subframe of the multiple subframes occupied by the service information indicated by the control information, and the control
  • the distance of the second position of the start subframe of the information is a fixed value, or the distance between the first location and the second location is indicated by high layer signaling, wherein the fixed value is not less than a repetition of the control information. frequency.
  • a device for transmitting control information where the determining unit is configured to: determine, according to the predefined information, a resource for repeatedly transmitting control information, where the pre-
  • the definition information includes at least one of the following: an coverage level, a repetition level/number of times, an aggregation level, and a sending module configured to repeatedly transmit the control information on the determined resource.
  • the repetition level/number of times and the aggregation level satisfy at least one of the following relationships: a product of an aggregation level and a repetition level/number of times is a fixed value, and the fixed value corresponds to a coverage level;
  • the one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple aggregation levels, one aggregation level corresponds to one repetition level/number of times, wherein the repetition levels/numbers corresponding to different aggregation levels are not all the same
  • one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple repetition levels/numbers, one repetition level/number corresponds to one aggregation level, wherein different repetition levels/ The aggregation levels corresponding to the number of times are not all the same; in the case of multiple repetition levels/numbers, one repetition level/number of times corresponds to multiple aggregation levels.
  • the determining module includes: a first determining unit, configured to determine, in the access process of the user equipment, the resource that repeatedly sends the control information according to the first predefined information, where the first predefined The repetition level/number of times and the aggregation level in the information satisfy one of the relationships; the second determining unit is configured to, after establishing an RRC connection with the user equipment, determine, according to the second predefined information, a resource that repeatedly sends the control information, where The repetition level/number of times and the aggregation level in the second predefined information satisfy one of the relationships.
  • the device further includes: a filling module, configured to add padding bits to the control information to be sent in different repetition times, wherein the size of the control information sent by different repetition times is different.
  • a filling module configured to add padding bits to the control information to be sent in different repetition times, wherein the size of the control information sent by different repetition times is different.
  • the sending module further includes a scrambling unit, configured to repeatedly transmit the control information on the determined resource, at least according to The repetition level/number of times scrambles the control information.
  • the scrambling unit is further configured to: when the control information/other information is repeatedly transmitted, the scrambling code added by scrambling the control information/the other information on each subframe remains the same And/or the scrambling unit is further configured to, in the case of repeatedly transmitting other information than the control information, the scrambling code added by scrambling the other information on each subframe is in a group of subframes Each subframe in the group is different, and the same scrambling code configuration is used among multiple groups of subframe groups.
  • the scrambling unit is further configured to scramble the control information according to at least a radio frame number.
  • the scrambling unit is further configured to calculate different scrambling code initial values c init according to at least the different repetition levels/number of times.
  • the scrambling unit is further configured to intercept the scrambling code c(n) of different positions according to different repetition levels/times.
  • the sending module further includes a cyclic shift unit configured to cyclically shift the control information according to at least the repetition level/number of times when the control information is sent on the resource.
  • a cyclic shift unit configured to cyclically shift the control information according to at least the repetition level/number of times when the control information is sent on the resource.
  • the sending module when the sending module sends the control information on the resource, the first location of the starting subframe of the multiple subframes occupied by the service information indicated by the control information, and the control
  • the distance of the second position of the start subframe of the information is a fixed value, or the distance between the first location and the second location is indicated by high layer signaling, wherein the fixed value is not less than a repetition of the control information. frequency.
  • a device for transmitting control information which is located in a user equipment, and includes: a first determining module, configured to determine, according to predefined information, a resource that repeatedly receives control information, where
  • the predefined information includes at least one of the following: an coverage level, a repetition level/number of times, an aggregation level, and a receiving module configured to repeatedly receive the control information on the determined resource.
  • the repetition level/number of times and the aggregation level satisfy at least one of the following relationships: a product of an aggregation level and a repetition level/number of times is a fixed value, and the fixed value corresponds to a coverage level;
  • the one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple aggregation levels, one aggregation level corresponds to one repetition level/number of times, wherein the repetition levels/numbers corresponding to different aggregation levels are not all the same
  • one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple repetition levels/numbers, one repetition level/number corresponds to one aggregation level, wherein different repetition levels/ The aggregation levels corresponding to the number of times are not all the same; in the case of multiple repetition levels/numbers, one repetition level/number of times corresponds to multiple aggregation levels.
  • the second determining module is configured to determine, according to the bit field in the received control information, a repetition level/number of times used by the control information, where the control information is received by different repetition times
  • the size is different in size by being added padding bits.
  • the first determining module further includes a descrambling unit, configured to repeatedly receive the control information on the determined resource, The control information is descrambled based at least on the repetition level/number of times.
  • the descrambling unit is further configured to: when repeatedly transmitting the control information/other information, the scrambling code used to descramble the control information/the other information in each subframe remains the same And/or the descrambling unit is further configured to, in the case of repeatedly transmitting other information than the control information, the scrambling code used to descramble the other information in each subframe is in a group of subframes Each subframe in the group is different, and the same scrambling code configuration is used among multiple groups of subframe groups.
  • the descrambling unit is further configured to descramble the control information according to at least a radio frame number.
  • the descrambling unit is further configured to calculate different scrambling code initial values c init according to at least the different repetition levels/number of times.
  • the descrambling unit is further configured to intercept the scrambling code c(n) of different locations according to different repetition levels/times.
  • the first determining module further includes: a de-rotation shifting unit, configured to solve the control information according to at least the repetition level/number of times, if the control information is received on the resource Cyclic shift.
  • a de-rotation shifting unit configured to solve the control information according to at least the repetition level/number of times, if the control information is received on the resource Cyclic shift.
  • the receiving module when the receiving module receives the control information on the resource, the first location of the starting subframe of the multiple subframes occupied by the service information indicated by the control information, and the control
  • the distance of the second position of the start subframe of the information is a fixed value, or the distance between the first location and the second location is indicated by high layer signaling, wherein the fixed value is not less than a repetition of the control information. frequency.
  • the base station determines, according to the predefined information, the resource for repeatedly transmitting the control information, where the predefined information includes at least one of the following: an coverage level, a repetition level/number of times, an aggregation level; and the base station repeats on the determined resource.
  • the method of transmitting the control information solves the problem that the MTC terminal with enhanced coverage cannot correctly receive the detection control channel in the case of different repeated transmissions, thereby ensuring the normal communication requirement of the terminal device.
  • FIG. 1 is a schematic flow chart of a method for transmitting control information according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of another method for transmitting control information according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a transmission apparatus for controlling information according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of another apparatus for transmitting control information according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of control information repetition level/number of times and service information starting position according to a preferred embodiment of the present invention
  • FIG. 6 is a schematic diagram of repeated transmission of control information and repeated transmission of service information in accordance with a preferred embodiment of the present invention.
  • the present invention proposes a control information transmission method suitable for coverage enhanced MTC terminals to address end user reception with coverage enhancement requirements.
  • the control channel problem with different repetition times transmission is detected to ensure the normal communication requirements of the terminal device.
  • FIG. 1 is a schematic flowchart of a method for transmitting control information according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 The base station determines, according to the predefined information, a resource that repeatedly sends the control information, where the predefined information includes at least one of the following: an coverage level, a repetition level/number of times, and an aggregation level;
  • Step S104 The base station repeatedly sends the control information on the determined resource.
  • the base station determines, according to the predefined information, the resource that repeatedly sends the control information, and sends the control information on the resource, where the predefined information includes at least one of the following: the coverage level, the repetition level/the number of times, and the aggregation level.
  • the user equipment uses the same policy to determine the resource for the base station to send the control information according to the predefined information, so that the user equipment can determine the repetition level/number of times according to the predefined information, and the user equipment is prevented from attempting less than the base station.
  • the number of repetitions actually used demodulates the control information, and the service information scheduled to receive the control information according to the interval k subframe relationship causes the service information to be received and detected incorrectly, and solves the problem.
  • the coverage enhanced MTC terminal cannot correctly receive the problem of detecting the control channel, thereby ensuring the normal communication requirements of the terminal device.
  • the repetition level/number of times and the aggregation level satisfy at least one of the following relationships:
  • the product of the aggregation level and the repetition level/time is a fixed value, and the fixed value corresponds to the coverage level;
  • One aggregation level There is only one aggregation level, and one aggregation level corresponds to multiple repetition levels/number of times;
  • one aggregation level corresponds to one repetition level/number of times, and the repetition levels/numbers corresponding to different aggregation levels are not all the same;
  • one repetition level/number corresponds to one aggregation level, and the aggregation levels corresponding to different repetition levels/numbers are not all the same;
  • the base station determines, according to the first predefined information, a resource for repeatedly transmitting control information, where the repetition level/number of times and the aggregation level in the first predefined information are satisfied.
  • a resource for repeatedly transmitting control information where the repetition level/number of times and the aggregation level in the second predefined information satisfy the foregoing One of the relationships.
  • the correspondence between the repetition level/number of times and the aggregation level may be the same or different in the access process and after the RRC is established.
  • a padding bit (for example, 0 bit) is added to the control information, and the padding bit may not carry any data information, and the function is to reduce the size of the downlink control information (DCI) at different repetition times. (size) is different.
  • control information when the control information is sent on the resource, the control information is scrambled according to at least the repetition level/number of times.
  • the repetition level/number of times can be determined according to one of the above relationships.
  • the added scrambling code needs to ensure that the same subframe remains the same for repeated transmission.
  • the scrambling code used when repeatedly transmitting and transmitting other information, the scrambling code used also needs to ensure that the repeated subframes remain the same in each subframe; or in four consecutive subframes, each of the four subframe groups repeatedly transmitted uses the same scrambling code.
  • the scrambling code is determined according to at least the radio frame number.
  • each subframe k that is repeatedly transmitted is k 0 , k 0 +1, . . . , k 0 +N-1
  • SFN takes the radio frame number of the subframe in which k 0 is located
  • h is the downlink subtitle available in the radio frame.
  • the number of frames, N is the number of repeated transmissions.
  • different scrambling sequence initial values c init are calculated according to different repetition levels/number of times (RL) such that different repetition levels/times scrambling sequences are different.
  • n is preferably 3 or 4 or 5 or 6, and k is preferably 2 or 3 or 4.
  • the scrambling sequence c(n) of different positions is intercepted according to different repetition levels/number of times RL, so that different repetition levels/times scrambling sequences are different.
  • control information when the control information is sent on the resource, the control information is cyclically shifted according to at least the repetition level/number of times.
  • M quad represents the length of the w (p) (i) sequence.
  • control information is sent on the resource, where the starting subframe position of the multiple subframes occupied by the service information indicated by the control information is a fixed value of the starting subframe of the control information or is indicated by a high layer signaling, where The value is not less than the number of times the control information is repeated.
  • FIG. 2 is a schematic flowchart of another method for transmitting control information according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 The user equipment determines, according to the predefined information, a resource that repeatedly receives the control information, where the predefined information includes at least one of the following: an coverage level, a repetition level/number of times, and an aggregation level;
  • Step S204 The user equipment repeatedly receives the control information on the determined resource.
  • the terminal determines, according to the predefined information, the resource that repeatedly receives the control information, and receives the control information on the resource, where the predefined information includes at least one of the following: the coverage level, the repetition level/the number of times, and the aggregation level.
  • the user equipment determines, according to the predefined information, the resource that the base station sends the control information, so that the user equipment can determine the repetition level/number of times according to the predefined information, and the user equipment is prevented from attempting less than the number of repetitions actually used by the base station.
  • Demodulating the control information, and receiving the service information scheduled by the control information according to the interval k subframe relationship leads to the problem that the service information is received and detected incorrectly, and solves the problem that the coverage enhanced MTC terminal cannot correctly receive the detection control channel in the case of different repeated transmissions. The problem, thus ensuring the normal communication needs of the terminal device.
  • the repetition level/number of times and the aggregation level satisfy at least one of the following relationships:
  • One-to-one correspondence and the product of the aggregation level and the repetition level/number of times is a fixed value
  • One aggregation level There is only one aggregation level, and one aggregation level corresponds to multiple repetition levels/number of times;
  • one aggregation level corresponds to one repetition level/number of times, and the repetition levels/numbers corresponding to different aggregation levels are not all the same;
  • one repetition level/number corresponds to one aggregation level, and the aggregation levels corresponding to different repetition levels/numbers are not all the same;
  • the repetition level/number of times used by the current control information is obtained according to the bit field in the received control information of different size sizes.
  • the control information of different size sizes is differentiated by adding padding bits (for example, 0 bits), so that the sizes of the downlink control information at different repetition times are different.
  • control information when the control information is received on the resource, the control information is descrambled according to at least the repetition level/number of times.
  • the scrambling code used for demodulation needs to ensure that the same subframe remains the same for repeated transmission.
  • the scrambling code used for demodulation also needs to ensure that the repeated subframes remain the same in each subframe; or in four consecutive subframes, each of the four subframe groups repeatedly transmitted uses the same interference. code.
  • the scrambling code is determined according to at least the radio frame number.
  • each subframe k that is repeatedly transmitted is k 0 , k 0 +1, . . . , k 0 +N-1
  • SFN takes the radio frame number of the subframe in which k 0 is located
  • h is the downlink subtitle available in the radio frame.
  • the number of frames, N is the number of repeated transmissions.
  • different descrambling sequence initial values c init are calculated according to different repetition levels/number of times (RL) such that different repetition levels/times descrambling sequences are different.
  • n is preferably 3 or 4 or 5 or 6, and k is preferably 2 or 3 or 4.
  • the descrambling sequences c(n) of different locations are intercepted according to different repetition levels (RL) such that different repetition levels/times descrambling sequences are different.
  • the demodulation control information is de-cyclically shifted according to at least the repetition level/number of times.
  • control information is received on the resource, where the starting subframe position of the multiple subframes occupied by the service information indicated by the control information is a fixed value of the starting subframe of the control information or is indicated by a high layer signaling, where a fixed value is used. Not less than the number of times the control information is repeated.
  • the control information transmission method proposed by the foregoing embodiment of the present invention determining the frequency domain location by using the predefined information, the blocking rate of the control information of the coverage enhanced MTC terminal during repeated transmission can be reduced, thereby ensuring normal transmission and reception of data information. Reduce system overhead and latency.
  • the embodiment of the present invention further provides a transmission apparatus for controlling information, which is used to implement the foregoing method for transmitting control information applied to a network side, where the apparatus is located on a network side, such as a base station.
  • 3 is a schematic structural diagram of a transmission apparatus for controlling information according to an embodiment of the present invention.
  • the apparatus includes: a determining module 32 and a transmitting module 34, wherein the determining module 32 is configured to determine a repetition according to predefined information.
  • a resource for transmitting control information wherein the predefined information comprises at least one of: coverage level, repetition level/number of times, aggregation level; the transmitting module 34 is coupled to the determining module 32, configured to repeatedly transmit the control information on the determined resource.
  • the modules and units involved in the embodiments of the present invention may be implemented by software or by hardware.
  • the described modules and units in this embodiment may also be disposed in a processor.
  • it may be described as a processor including a determining module 32 and a transmitting module 34.
  • the names of these modules do not constitute a limitation on the module itself in some cases.
  • the determining module 32 may also be described as "a module that is set to determine resources for repeatedly transmitting control information according to predefined information.”
  • the repetition level/number of times and the aggregation level satisfy at least one of the following relationships: the product of the aggregation level and the repetition level/number of times is a fixed value, and the fixed value corresponds to the coverage level; in the case of only one aggregation level, this One aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple aggregation levels, one aggregation level corresponds to one repetition level/number of times, wherein the repetition levels/numbers corresponding to different aggregation levels are not all the same; In the case of a level, one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple repetition levels/numbers, one repetition level/number corresponds to one aggregation level, wherein the aggregation level corresponding to different repetition levels/numbers is incomplete The same; in the case of multiple repetition levels/numbers, one repetition level/number corresponds to multiple aggregation levels.
  • the determining module 32 includes: a first determining unit 322, configured to: in the access process of the user equipment, determine, according to the first predefined information, a resource that repeatedly sends control information, where the first predefined information is repeated The level/number of times and the aggregation level satisfy one of the relationships; the second determining unit 324 is configured to, after establishing an RRC connection with the user equipment, determine, according to the second predefined information, the resource for repeatedly transmitting the control information, where the second predefined information is The repetition level/number of times and the aggregation level satisfy one of the relationships.
  • the “first” and “second” in the “first determining unit” and the “second determining unit” are only used to functionally identify the two units, and It is not used to indicate the limitation on the working and connection order of these units. Moreover, in some cases, these units and modules may be provided in combination or separately, and are not limited in the embodiment of the present invention unless otherwise specified.
  • the apparatus further comprises: a filling module 36 coupled to the transmitting module 34, configured to add padding bits to the control information to be sent in different repetition times, wherein the size of the control information transmitted by different repetition times is different.
  • the sending module 34 further includes a scrambling unit 346 configured to scramble at least according to the repetition level/number of times in the case of repeatedly transmitting the control information on the determined resource. Control information.
  • the scrambling unit 346 is further configured to: in the case of repeatedly transmitting the control information/other information, the scrambling code added by scrambling the control information/other information on each subframe remains the same; and/or the scrambling unit 346, further configured to: in the case of repeatedly transmitting other information than the control information, the scrambling code added by scrambling other information on each subframe is different in each subframe in the group in a group of subframes, and The same scrambling code configuration is used between multiple groups of subframe groups.
  • the scrambling unit 346 is further configured to scramble the control information according to at least a radio frame number.
  • the scrambling unit 346 is further configured to calculate different scrambling code initial values c init according to at least different repetition levels/number of times.
  • the scrambling unit 346 is further configured to intercept the scrambling code c(n) of different positions according to different repetition levels/times.
  • the transmitting module 34 further includes a cyclic shifting unit 348 configured to cyclically shift the control information according to at least the repetition level/number of times in the case where the control information is transmitted on the resource.
  • a cyclic shifting unit 348 configured to cyclically shift the control information according to at least the repetition level/number of times in the case where the control information is transmitted on the resource.
  • the sending module 34 when the sending module 34 sends the control information on the resource, the first location of the starting subframe of the multiple subframes occupied by the service information indicated by the control information, and the second location of the starting subframe of the control information
  • the distance of the location is a fixed value, or the distance between the first location and the second location is indicated by higher layer signaling, wherein the fixed value is not less than the number of repetitions of the control information.
  • the embodiment of the present invention further provides another transmission method for controlling information, which is used to implement the foregoing method for transmitting control information applied to the terminal side, and the device is located at the terminal (user equipment) side, such as a user equipment.
  • 4 is a schematic structural diagram of a transmission apparatus for control information according to an embodiment of the present invention. As shown in FIG.
  • the apparatus includes: a first determining module 42 and a receiving module 44, wherein the first determining module 42 is configured to be based on a pre- Defining information, determining resources for repeatedly receiving control information, wherein the predefined information comprises at least one of: coverage level, repetition level/number of times, aggregation level; the receiving module 44 is coupled to the first determining module 42 and configured to determine the resource Repeated reception of control information.
  • the repetition level/number of times and the aggregation level satisfy at least one of the following relationships: the product of the aggregation level and the repetition level/number of times is a fixed value, and the fixed value corresponds to the coverage level; in the case of only one aggregation level, this One aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple aggregation levels, one aggregation level corresponds to one repetition level/number of times, wherein the repetition levels/numbers corresponding to different aggregation levels are not all the same; In the case of a level, one aggregation level corresponds to multiple repetition levels/numbers; in the case of multiple repetition levels/numbers, one repetition level/number corresponds to one aggregation level, wherein the aggregation level corresponding to different repetition levels/numbers is incomplete The same; in the case of multiple repetition levels/numbers, one repetition level/number corresponds to multiple aggregation levels.
  • the apparatus further includes: a second determining module 46, configured to determine, according to the bit field in the received control information, a repetition level/number of times used by the control information, where the control information received by the different repetition times is The size is different in size by being added padding bits.
  • a second determining module 46 configured to determine, according to the bit field in the received control information, a repetition level/number of times used by the control information, where the control information received by the different repetition times is The size is different in size by being added padding bits.
  • the first determining module 42 further includes a descrambling unit 422 configured to, at least according to the repetition level/number of times, in the case of repeatedly receiving the control information on the determined resource. De-scrambling control information.
  • the descrambling unit 422 is further configured to: in the case of repeatedly transmitting the control information/other information, the scrambling code used to descramble the control information/other information on each subframe remains the same; and/or the descrambling unit 422, further configured to: in the case of repeatedly transmitting other information than the control information, the scrambling code used to descramble other information on each subframe is different in each subframe in the group in a group of subframes, and The same scrambling code configuration is used between multiple groups of subframe groups.
  • the descrambling unit 422 is further configured to descramble the control information according to at least a radio frame number.
  • the descrambling unit 422 is further configured to calculate different scrambling code initial values c init according to at least different repetition levels/number of times.
  • the descrambling unit 422 is further configured to intercept the scrambling code c(n) of the different locations according to different repetition levels/times.
  • the first determining module 42 further includes: a de-rotation shifting unit 424 configured to de-rotate the control information according to at least the repetition level/number of times in the case of receiving the control information on the resource.
  • a de-rotation shifting unit 424 configured to de-rotate the control information according to at least the repetition level/number of times in the case of receiving the control information on the resource.
  • the receiving module 44 when the receiving module 44 receives the control information on the resource, the first location of the starting subframe of the multiple subframes occupied by the service information indicated by the control information, and the second location of the starting subframe of the control information
  • the distance of the location is a fixed value, or the distance between the first location and the second location is indicated by higher layer signaling, wherein the fixed value is not less than the number of repetitions of the control information.
  • the number of repeated transmissions is not necessarily a fixed value, for example, the coverage performance changes due to channel conditions or terminal location changes, and the number of times of using repeated transmissions also changes, so that the terminal not only detects different aggregation levels when receiving detection control information.
  • There is also the problem of detecting the number of repetitions which in turn requires determining the location of the business information indicated by the control information. If the base station side transmits the control information using a larger number of repetitions, and the terminal demodulates the control information after attempting less than the number of repetitions actually used by the base station, and receives the service information scheduled by the control information according to the interval k subframe relationship, As a result, the service information reception detection error causes the communication process of the base station to transmit data to the terminal to fail. Therefore, it is necessary to further design the reception detection during repeated transmission.
  • the base station determines the resource for repeatedly transmitting the control information according to the predefined information, and may also be the total aggregation resource, and send the control information on the resource, where the predefined information includes at least one of the following: coverage level, repetition level/number of times, and aggregation level.
  • the coverage level (CL) is defined as the maximum coverage level corresponding to the maximum coverage requirement according to different coverage scenarios, and the maximum coverage target is 15 dB (or 20 dB) for coverage improvement, and the coverage level is assumed to be three.
  • the maximum coverage level CL3 corresponds to the performance requirement corresponding to the maximum coverage requirement, and the coverage is increased by 15 dB
  • CL2 corresponds to 10 dB
  • CL1 corresponds to 5 dB.
  • the repetition level/number of times corresponds to the coverage level.
  • the repetition level (RL) 3 corresponds to the coverage level CL3
  • the repetition level (RL) 2 corresponds to the coverage level CL2
  • the repetition level (RL) 1 corresponds to the coverage level CL1.
  • the repetition level is changed to the number of repetitions (RT), for example, the number of repetitions RT3 corresponds to the coverage level CL3, the number of repetitions RT2 corresponds to the coverage level CL2, and the number of repetitions RT1 corresponds to the coverage level CL1.
  • the aggregation level is the respective aggregation level (AL) of the control channel, such as AL1, 2, 4, and 8 are 1 CCE, 2 CCE, 4 CCE, and 8 CCE, respectively.
  • the total aggregate resource is a single value or multiple values.
  • the repetition level/number of times and the aggregation level are in a one-to-one correspondence.
  • the Total Aggregation Resource (TAR) is a single value, that is, the sum of the resource of the repetition level (RL) and the aggregation level (AL) corresponding to the TAR is a single value, for example,
  • the repetition level (RL) 3 (for example, 8 repetitions) corresponds to AL2, RL2 (for example, 4 repetitions) corresponds to AL4, and RL1 (for example, 2 repetitions) corresponds to AL8, and the TAR is 16 CCE.
  • the number of blind checks at this time depends on the number of repetition levels (or aggregation levels). It is suitable for covering scenarios where the channel state of the enhanced scene is basically unchanged. Has a certain scheduling flexibility.
  • the timing relationship is fixed or variable, and there is no possibility that the timing relationship is judged to be incorrect due to a blind check repetition level judgment error (because the smaller repetition level is different from the aggregation level used by the larger repetition level).
  • the repetition level/number of times and the aggregation level are predefined, at least one of the following six types:
  • the total aggregation resource (TAR) is a plurality of values, that is, the sum of the resources of the repetition level (RL) and the aggregation level (AL) at this time is a plurality of values.
  • the TAR has multiple values and only one AL, and one AL corresponds to multiple RLs.
  • the number of blind checks at this time depends on the number of repetition levels. Suitable for covering scenes that enhance channel state changes in the scene. No scheduling flexibility. When the timing relationship is fixed or variable, there may be a case where the timing relationship is judged to be incorrect due to the error in the blind check repetition level.
  • the TAR has multiple values and only one RL, and one RL corresponds to multiple ALs.
  • the number of blind checks at this time depends on the number of aggregation levels. Suitable for covering scenes that enhance channel state changes in the scene. Has a certain scheduling flexibility. The timing relationship is fixed, and there is no possibility that the timing relationship is judged to be incorrect due to the error of the blind check repetition level. This situation is in line with the existing agreement blind inspection.
  • the TAR has multiple values and multiple ALs, one AL corresponds to one TAR, and corresponds to one RL, and the RLs corresponding to different ALs are not all the same.
  • the number of blind checks at this time depends on the number of aggregation levels. Suitable for covering scenes that enhance channel state changes in the scene. Has a certain scheduling flexibility. The timing relationship is fixed or variable, and there is no possibility that the timing relationship is judged to be incorrect due to the error in the blind check repetition level.
  • the TAR has multiple values and multiple RLs, one RL corresponds to one TAR, and corresponds to one AL, and the ALs corresponding to different RLs are not all the same.
  • the number of blind checks at this time depends on the number of repetition levels. Suitable for covering scenes that enhance channel state changes in the scene. Has a certain scheduling flexibility. When the timing relationship is fixed or variable, there may be a case where the timing relationship is judged to be incorrect due to the error in the blind check repetition level.
  • the TAR has multiple values and has multiple ALs.
  • One AL corresponds to multiple TARs, and one AL corresponds to multiple RLs.
  • the number of blind checks at this time depends on the number of repetition levels and aggregation level correspondences. Suitable for covering scenes that enhance channel state changes in the scene. Has a certain scheduling flexibility. When the timing relationship is fixed or variable, there may be a case where the timing relationship is judged to be incorrect due to the error in the blind check repetition level.
  • the TAR has multiple values and has multiple RLs, one RL corresponds to multiple TARs, and one RL corresponds to multiple ALs.
  • the number of blind checks at this time depends on the number of repetition levels and aggregation level correspondences. Suitable for covering scenes that enhance channel state changes in the scene. Has a certain scheduling flexibility. When the timing relationship is fixed or variable, there may be a case where the timing relationship is judged to be incorrect due to the error in the blind check repetition level.
  • 0 bits are added to the control information, so that the size of the downlink control information (DCI size) is different when the number of repetitions is different.
  • the length of 0 bit is corresponding to the repetition level/number of times used.
  • 0 bits are added to the control information, and the number of all 0 bits added according to different repetition levels/numbers is different.
  • RL1 adds 1 0 bit
  • RL2 adds 2 0 bits
  • RL3 adds 3 0 bits, so that each repetition The level of DCI is different when using the same DCI format.
  • control information when the control information is transmitted on the resource, the control information is scrambled according to at least the repetition level/number of times.
  • the added scrambling code needs to ensure that the respective subframes of the repeated transmission remain the same.
  • the scrambling code used also needs to ensure that the repeated transmissions remain the same on each subframe; or in four consecutive subframes, the four sub-frame groups of the repeated transmission use the same Scrambling code. This allows the repeatedly transmitted information to be combined and decoded more easily at the receiving end.
  • the scrambling code is determined according to at least the radio frame number.
  • each subframe k that is repeatedly transmitted is k 0 , k 0 +1, . . . , k 0 +N-1
  • SFN takes the radio frame number of the subframe in which k 0 is located
  • h is the downlink subtitle available in the radio frame.
  • the number of frames, N is the number of repeated transmissions.
  • different scrambling sequence initial values c init are calculated according to different repetition levels/times (RL), so that different repetition levels/times scrambling sequences are different. This makes it easier for the receiving end to distinguish information transmitted using different repetition levels.
  • n is preferably 3 or 4 or 5 or 6, and k is preferably 2 or 3 or 4.
  • the scrambling sequence c(n) of different positions is intercepted according to different repetition levels/number of times (RL) such that different repetition levels/times scrambling sequences are different. This makes it easier for the receiving end to distinguish information transmitted using different repetition levels.
  • control information when the control information is sent on the resource, the control information is cyclically shifted according to at least the repetition level/number of times. This makes it easier for the receiving end to distinguish information transmitted using different repetition levels.
  • control information is sent on the resource, where the starting subframe position of the multiple subframes occupied by the service information indicated by the control information is a fixed value, and the fixed value is not less than the number of times the control information is repeated.
  • the receiving end does not judge the error when determining the timing relationship between the traffic channel and the control channel. As shown in Figure 5.
  • control information is sent on the resource, and the starting subframe position of the multiple subframes occupied by the service information indicated by the subframe control information is indicated by the high layer signaling.
  • the receiving end does not judge the error when determining the timing relationship between the traffic channel and the control channel. As shown in Figure 6.
  • the message in the CSS is sent by using the maximum repetition level, and in the USS, the blind detection repetition level requirement is more obvious due to the service of each UE, and then an RRC letter is passed after the RRC connection is established.
  • k denote the distance between the PDSCH start subframe and the (E)PDCCH end subframe
  • the repetition level of the traffic channel As shown in Table 12.
  • This embodiment describes the control information transmission in detail by using the method provided by the present invention.
  • the base station determines the total aggregation resource for repeatedly transmitting the control information according to the coverage level, the repetition level, and the aggregation level, and transmits the control information on the resource.
  • the total aggregate resource (TAR) uses multiple values and only one AL, there are three RL1-3 repetition levels, and one of the multiple aggregate resources is used, and the AL4 and RL4 in the table are used. Transfer.
  • the repetition level (RL) is taken as one of the initial values c init of the scrambling sequence, so that the different repetition level/number of scrambling sequences are different. And the added scrambling code needs to ensure that the same subframe remains the same for repeated transmission.
  • the initial value of the scrambling sequence is or C is a constant.
  • each subframe k that is repeatedly transmitted is k 0 , k 0 +1, . . . , k 0 +N-1
  • SFN takes the radio frame number of the subframe in which k 0 is located, and h is the downlink subtitle available in the radio frame.
  • the number of frames, N is the number of repeated transmissions.
  • the scrambled control information is transmitted to the terminal after modulation, cyclic shift, and resource mapping.
  • the terminal blindly receives the control information and uses the total aggregated resources of multiple values. It is necessary to blindly check the three repetition levels (RL). At this time, the number of blind detections is proportional to the number of repetition levels.
  • the terminal blindly checks the control information according to different repetition levels. When different blind levels are used for blind detection, the respective descrambling sequences are used to obtain corresponding control information.
  • the repeatedly transmitted control information can be adapted to cover the change scene by using different repetition levels, and the terminal obtains the control information by the blind check repetition level.
  • different scrambling codes are used for different repetition levels, and the pre-demodulation correctly does not cause the timing relationship judgment of the scheduled service information to be incorrect when receiving the detection, and the information transmission is ensured under the condition of blind detection repetition level.
  • This embodiment describes the control information transmission in detail by using the method provided by the present invention.
  • the base station determines the total aggregation resource for repeatedly transmitting the control information according to the coverage level, the repetition level, and the aggregation level, and transmits the control information on the resource.
  • the coverage level (CL) is CL1 at this time, and a single aggregation level is used, and the transmission is performed using AL8 and RL2 in the table.
  • the terminal blindly receives the control information, uses a single aggregated aggregate resource, and needs to blindly check three repetition levels (RL), and the aggregation level corresponds to the repetition level one by one.
  • RL repetition levels
  • the terminal obtains control information by blind detection of the repetition level.
  • different repetition levels correspond to aggregation levels one by one.
  • receiving detection there is no pre-demodulation correctness, which causes the timing information of the scheduled service information to be judged incorrectly, and the information transmission is guaranteed under the condition of blind detection repetition level.
  • This embodiment describes the control information transmission in detail by using the method provided by the present invention.
  • the base station determines the total aggregation resource for repeatedly transmitting the control information according to the coverage level, the repetition level, and the aggregation level, and transmits the control information on the resource.
  • the total aggregate resource uses multiple values and has multiple RLs.
  • One RL corresponds to one TAR and corresponds to one AL.
  • the ALs corresponding to different RLs are not all the same.
  • the repetition level (RL) is used as one of the calculation scrambling sequences, so that the different repetition level/number of scrambling sequences are different.
  • the added scrambling code needs to ensure that the same subframe remains the same for repeated transmission.
  • the initial value of the scrambling sequence is or C is a constant.
  • each subframe k that is repeatedly transmitted is k 0 , k 0 +1, . . . , k 0 +N-1
  • SFN takes the radio frame number of the subframe in which k 0 is located, and h is the downlink subtitle available in the radio frame.
  • the number of frames, N is the number of repeated transmissions.
  • the scrambled control information is transmitted to the terminal after modulation, cyclic shift, and resource mapping.
  • the terminal blindly receives the control information and uses the total aggregated resources of multiple values. It is necessary to blindly check the three repetition levels (RL). At this time, the number of blind detections is proportional to the number of repetition levels.
  • the terminal blindly checks the control information according to different repetition levels. When different blind levels are used for blind detection, the respective descrambling sequences are used to obtain corresponding control information.
  • the repeatedly transmitted control information can be adapted to cover the change scene by using different repetition levels, and the terminal obtains the control information by the blind check repetition level.
  • different scrambling codes are used for different repetition levels, and the pre-demodulation correctly does not cause the timing relationship judgment of the scheduled service information to be incorrect when receiving the detection, and the information transmission is ensured under the condition of blind detection repetition level.
  • This embodiment describes the control information transmission in detail by using the method provided by the present invention.
  • the base station determines a total aggregation resource for repeatedly transmitting control information according to the coverage level, the repetition level, and the aggregation level, and transmits the control information on the resource.
  • the total aggregate resource uses a plurality of values and has multiple ALs, one AL corresponds to multiple TARs, one AL corresponds to multiple RLs, and different ALs correspond to TARs.
  • each subframe k that is repeatedly transmitted is k 0 , k 0 +1, . . . , k 0 +N-1
  • SFN takes the radio frame number of the subframe in which k 0 is located
  • h is the downlink subtitle available in the radio frame.
  • the number of frames, N is the number of repeated transmissions.
  • the scrambled control information is modulated and cyclically shifted, wherein the control information is cyclically shifted according to the repetition level/number of times. After the resource mapping is performed, it is sent to the terminal.
  • the terminal blindly receives the control information and uses the total aggregation resources of multiple values. It is necessary to blindly check the three repetition levels (RL). At this time, the number of blind detections is proportional to the number of correspondences between the repetition level and the aggregation level.
  • the terminal blindly checks the control information according to different repetition levels, and uses different cyclic shift demodulation for blind detection of different repetition levels to obtain corresponding control information.
  • the repeatedly transmitted control information can be adapted to cover the change scene by using different repetition levels, and the terminal obtains the control information by the blind check repetition level.
  • different repetitive levels use different cyclic shifts, and the pre-demodulation correctly does not cause the timing information of the scheduled service information to be judged incorrectly during the reception detection, and the information transmission is ensured under the condition of blind detection repetition level.
  • the base station determines, according to the predefined information, the resource for repeatedly transmitting the control information, where the predefined information includes at least one of the following: an coverage level, a repetition level/number of times, an aggregation level; and the base station repeats on the determined resource.
  • the method of transmitting the control information solves the problem that the MTC terminal with enhanced coverage cannot correctly receive the detection control channel in the case of different repeated transmissions, thereby ensuring the normal communication requirement of the terminal device.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in a storage device by a computing device, or they may be fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

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Abstract

本发明公开了一种控制信息的传输方法及装置。其中，该方法包括：基站根据预定义信息，确定重复发送控制信息的资源，其中，预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；基站在确定的资源上重复发送控制信息。通过本发明，解决了不同重复次数传输的情况下覆盖增强的MTC终端无法正确接收检测控制信道的问题，从而保证终端设备的正常通信需求。

Description

控制信息的传输方法及装置 技术领域
本发明涉及通信领域，具体而言，涉及一种控制信息的传输方法及装置。
背景技术
机器类型通信(Machine Type Communication，简称为MTC)用户终端(User Equipment，简称用户设备或终端)，又称，机器到机器(Machine to Machine，简称M2M)用户通信设备，是目前物联网的主要应用形式。近年来，由于长期演进(Long-Term Evolution，简称为LTE)/高级长期演进系统(Long-Term Evolution Advance，简称为LTE-Advance或LTE-A)的频谱效率高，越来越多的移动运营商选择LTE/LTE-A作为宽带无线通信系统的演进方向。基于LTE/LTE-A的MTC多种类数据业务也将更具吸引力。
现有的LTE/LTE-A系统是基于每个子帧动态调度进行传输的，即每个子帧均可以传输不同的控制信道。
LTE/LTE-A中定义了物理下行控制信道(Physical Downlink Control Channel，简称为PDCCH)和增强物理下行控制信道(Enhanced Physical Downlink Control Channel，简称为EPDCCH)。物理控制格式指示信道(Physical Control Format Indicator Channel，简称为PCFICH)承载的信息用于指示在一个子帧里传输PDCCH的正交频分复用(Orthogonal Frequency Division Multiplexing，简称为OFDM)符号的数目。物理混合自动重传请求(Automatic Repeat-reQuest，简称为ARQ)指示信道(Physical Hybrid-ARQ Indicator Channel，简称为PHICH)用于承载上行传输数据的肯定应答/否定应答(ACK/NACK)反馈信息。下行控制信道采用盲检测，终端在一定的搜索空间中尝试以不同的聚合等级和候选集解调下行控制信道。
表1PDCCH搜索空间
Figure PCTCN2014088427-appb-000001
Figure PCTCN2014088427-appb-000002
现有UE专有搜索空间如表1和表2所示，搜索空间由不同聚合等级所对应的候选集组成，终端解调控制信道时需要尝试解调各个候选集直至解调正确，否则认为没有接收到属于自己的控制信道。
表2EPDCCH搜索空间(One Distributed EPDCCH-PRB-set–Case 3)
Figure PCTCN2014088427-appb-000003
PDCCH/EPDCCH用于承载下行控制信息(Downlink Control Information，简称为DCI)，包括：上、下行调度信息，以及上行功率控制信息。
通常MTC终端可以通过在每个子帧解调PDCCH/EPDCCH信道获得DCI，以便实现对物理下行共享信道(Physical Downlink Share Channel，简称为PDSCH)的解调和物理上行共享信道(Physical Uplink Share Channel，简称为PUSCH)的调度指示信息。
在MTC应用终端中，有一类终端由于所处位置或自身特性受限从而导致覆盖性能显著下降。例如智能抄表类MTC终端大多固定安装在地下室等低覆盖性能环境下，其主要发送小包数据，对数据速率的要求低，能够容忍较大的数据传输时延。由于此类终端对数据速率要求低，对于数据信道而言，可以通过更低的调制编码速率以及时域上的多次重复发送等方式来保证小包数据的正确传输。在接收重复传输的控制信息时，最大盲检次数会随着重复子帧数量呈指数性增加，因此有必要对盲检路径进行限制。常见的限制盲检路径方法为各子帧使用相同的聚合等级以及相同的候选集。由于重复传输次数并不一定是固定值，例如根据信道状况或者终端位置变化导致覆盖性能变化，进而使用重复传输的次数也随之变化，这样终端在接收检测控制信息时，除了检测不同聚合等级，还面临着检测重复次数的问题，进而需要确定控制信息所指示的业务信息的位置。因此需要进一步对重复传输时接收检测进行设计。
针对相关技术中在不同重复次数传输的情况下的覆盖增强的MTC终端无法正确接收检测控制信道的问题，目前尚无有效地解决方案。
发明内容
本发明实施例提供了一种控制信息的传输方法及装置，以至少解决上述问题。
根据本发明实施例的一个方面，提供了一种控制信息的传输方法，包括：基站根据预定义信息，确定重复发送控制信息的资源，其中，所述预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；所述基站在确定的所述资源上重复发送所述控制信息。
可选地，所述重复等级/次数和所述聚合等级至少满足以下关系之一：聚合等级与重复等级/次数的乘积为定值，且所述定值对应于覆盖等级；在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；在有多个聚合等级的情况下，一个聚合等级对应多个重复等级/次数；在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
可选地，基站根据预定义信息，确定重复发送控制信息的资源包括：所述基站在用户设备的接入过程中，根据第一预定义信息确定重复发送所述控制信息的资源，其中，所述第一预定义信息中的重复等级/次数和聚合等级满足所述关系之一；所述基站在与用户设备建立RRC连接后，根据第二预定义信息确定重复发送所述控制信息的资源，其中，所述第二预定义信息中的重复等级/次数和聚合等级满足所述关系之一。
可选地，所述基站在确定的所述资源上重复发送所述控制信息之前，所述方法还包括：所述基站在不同重复次数将要发送的所述控制信息中添加填充比特，其中，不同重复次数发送的所述控制信息的大小相异。
可选地，在所述预定义信息包括重复等级/次数的情况下，所述基站在确定的所述资源上重复发送所述控制信息的情况下，至少根据所述重复等级/次数加扰所述控制信息。
可选地，所述基站在重复传输所述控制信息/其他信息的情况下，在各子帧上加扰所述控制信息/所述其他信息所添加的扰码保持相同；和/或所述基站在重复传输除控制 信息之外的其他信息的情况下，在各子帧上加扰所述其他信息所添加的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
可选地，所述基站至少还根据无线帧号加扰所述控制信息。
可选地，所述基站加扰所述控制信息的扰码cinit根据下列公式确定：
Figure PCTCN2014088427-appb-000004
或
Figure PCTCN2014088427-appb-000005
其中，C为常数，重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN为k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数，
Figure PCTCN2014088427-appb-000006
表示小区识别码。
可选地，所述基站至少根据所述重复等级/次数加扰所述控制信息包括：所述基站至少根据不同的所述重复等级/次数计算得到不同的扰码初始值cinit。
可选地，所述基站加扰所述控制信息的扰码初始值cinit根据下列公式确定：
Figure PCTCN2014088427-appb-000007
或者其中，
Figure PCTCN2014088427-appb-000009
或
Figure PCTCN2014088427-appb-000010
C为常数，重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN为k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数，m、k为自然数，NRL表示重复等级/次数的数值，
Figure PCTCN2014088427-appb-000011
表示小区识别码。
可选地，所述基站至少根据所述重复等级/次数加扰所述控制信息包括：所述基站根据不同的所述重复等级/次数截取不同位置的扰码c(n)。
可选地，所述基站加扰所述控制信息的扰码c(n)根据下列公式确定：c(n)RL1＝c(n)n＝NRL1,NRL1+1,...,NRL1+MPN-1；其中，RL表示重复等级/次数，NRL表示重复等级/次数的数值，MPN表示c(n)序列的长度。
可选地，所述基站在确定的所述资源上重复发送所述控制信息包括：所述基站在所述资源上发送所述控制信息的情况下，至少根据所述重复等级/次数对所述控制信息进行循环移位。
可选地，所述基站对所述控制信息进行循环移位根据下列公式确定：
Figure PCTCN2014088427-appb-000012
或者，
Figure PCTCN2014088427-appb-000013
其中，i＝0,1,…Mquad-1，Mquad表示w(p)(i)序列的长度。
可选地，所述基站在所述资源上发送所述控制信息的情况下，所述控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与所述控制信息的起始子帧的第二位置的距离为固定值，或者所述第一位置与所述第二位置的距离通过高层信令指示，其中，所述固定值不小于所述控制信息的重复次数。
根据本发明实施例的另一个方面，还提供了一种控制信息的传输方法，包括：用户设备根据预定义信息，确定重复接收控制信息的资源，其中，所述预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；所述用户设备在确定的所述资源上重复接收所述控制信息。
可选地，所述重复等级/次数和所述聚合等级至少满足以下关系之一：聚合等级与重复等级/次数的乘积为定值，且所述定值对应于覆盖等级；在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；在有多个聚合等级的情况下，一个聚合等级对应多个重复等级/次数；在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
可选地，在所述用户设备在确定的所述资源上重复接收所述控制信息之后，所述方法还包括：所述用户设备根据接收到的所述控制信息中的比特域，确定所述控制信息所使用的重复等级/次数，其中，不同重复次数接收到的所述控制信息的大小通过被添加填充比特而大小相异。
可选地，在所述预定义信息包括重复等级/次数的情况下，所述用户设备在确定的所述资源上重复接收所述控制信息的情况下，至少根据所述重复等级/次数解扰所述控制信息。
可选地，所述用户设备在重复传输所述控制信息/其他信息的情况下，在各子帧上解扰所述控制信息/所述其他信息所使用的扰码保持相同；和/或所述用户设备在重复传输除控制信息之外的其他信息的情况下，在各子帧上解扰所述其他信息所使用的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
可选地，所述用户设备至少还根据无线帧号解扰所述控制信息。
可选地，所述用户设备解扰所述控制信息的扰码cinit根据下列公式确定：
Figure PCTCN2014088427-appb-000014
或
Figure PCTCN2014088427-appb-000015
其中，C为常数，重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN为k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数，
Figure PCTCN2014088427-appb-000016
表示小区识别码。
可选地，所述用户设备至少根据所述重复等级/次数解扰所述控制信息包括：所述用户设备至少根据不同的所述重复等级/次数计算得到不同的扰码初始值cinit。
可选地，所述用户设备解扰所述控制信息的扰码初始值cinit根据下列公式确定：
Figure PCTCN2014088427-appb-000017
或者
Figure PCTCN2014088427-appb-000018
其中，
Figure PCTCN2014088427-appb-000019
或
Figure PCTCN2014088427-appb-000020
C为常数，重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN为k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数，m、k为自然数，NRL表示重复等级/次数的数值，
Figure PCTCN2014088427-appb-000021
表示小区识别码。
可选地，所述用户设备站至少根据所述重复等级/次数解扰所述控制信息包括：所述用户设备根据不同的所述重复等级/次数截取不同位置的扰码c(n)。
可选地，所述用户设备解扰所述控制信息的扰码c(n)根据下列公式确定：c(n)RL1＝c(n)n＝NRL1,NRL1+1,...,NRL1+MPN-1；其中，RL表示重复等级/次数，NRL表示重复等级/次数的数值，MPN表示c(n)序列的长度。
可选地，所述用户设备在确定的所述资源上重复接收所述控制信息包括：所述用户设备在所述资源上接收所述控制信息的情况下，至少根据所述重复等级/次数对所述控制信息进行解循环移位。
可选地，所述用户设备对所述控制信息进行解循环移位根据下列公式确定：
Figure PCTCN2014088427-appb-000022
或者，
Figure PCTCN2014088427-appb-000023
其中，i＝0,1,…Mquad-1，Mquad表示w(p)(i)序列的长度。
可选地，所述用户设备在所述资源上接收所述控制信息的情况下，所述控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与所述控制信息的起始子帧的第二位置的距离为固定值，或者所述第一位置与所述第二位置的距离通过高层信令指示，其中，所述固定值不小于所述控制信息的重复次数。
根据本发明实施例的另一个方面，还提供了一种控制信息的传输装置，位于基站中，包括：确定模块，设置为根据预定义信息，确定重复发送控制信息的资源，其中，所述预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；发送模块，设置为在确定的所述资源上重复发送所述控制信息。
可选地，所述重复等级/次数和所述聚合等级至少满足以下关系之一：聚合等级与重复等级/次数的乘积为定值，且所述定值对应于覆盖等级；在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；在有多个聚合等级的情况下，一个聚合等级对应多个重复等级/次数；在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
可选地，所述确定模块包括：第一确定单元，设置为在用户设备的接入过程中，根据第一预定义信息确定重复发送所述控制信息的资源，其中，所述第一预定义信息中的重复等级/次数和聚合等级满足所述关系之一；第二确定单元，设置为在与用户设备建立RRC连接后，根据第二预定义信息确定重复发送所述控制信息的资源，其中，所述第二预定义信息中的重复等级/次数和聚合等级满足所述关系之一。
可选地，所述装置还包括：填充模块，设置为在不同重复次数将要发送的所述控制信息中添加填充比特，其中，不同重复次数发送的所述控制信息的大小相异。
可选地，在所述预定义信息包括重复等级/次数的情况下，所述发送模块还包括加扰单元，设置为在确定的所述资源上重复发送所述控制信息的情况下，至少根据所述重复等级/次数加扰所述控制信息。
可选地，所述加扰单元，还设置为在重复传输所述控制信息/其他信息的情况下，在各子帧上加扰所述控制信息/所述其他信息所添加的扰码保持相同；和/或所述加扰单元，还设置为在重复传输除控制信息之外的其他信息的情况下，在各子帧上加扰所述其他信息所添加的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
可选地，所述加扰单元，还设置为至少还根据无线帧号加扰所述控制信息。
可选地，所述加扰单元，还设置为至少根据不同的所述重复等级/次数计算得到不同的扰码初始值cinit。
可选地，所述加扰单元，还设置为根据不同的所述重复等级/次数截取不同位置的扰码c(n)。
可选地，所述发送模块还包括循环移位单元，设置为在所述资源上发送所述控制信息的情况下，至少根据所述重复等级/次数对所述控制信息进行循环移位。
可选地，所述发送模块在所述资源上发送所述控制信息的情况下，所述控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与所述控制信息的起始子帧的第二位置的距离为固定值，或者所述第一位置与所述第二位置的距离通过高层信令指示，其中，所述固定值不小于所述控制信息的重复次数。
根据本发明的另一个方面，还提供了一种控制信息的传输装置，位于用户设备中，包括：第一确定模块，设置为根据预定义信息，确定重复接收控制信息的资源，其中，所述预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；接收模块，设置为在确定的所述资源上重复接收所述控制信息。
可选地，所述重复等级/次数和所述聚合等级至少满足以下关系之一：聚合等级与重复等级/次数的乘积为定值，且所述定值对应于覆盖等级；在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；在有多个聚合等级的情况下，一个聚合等级对应多个重复等级/次数；在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
可选地，第二确定模块，设置为根据接收到的所述控制信息中的比特域，确定所述控制信息所使用的重复等级/次数，其中，不同重复次数接收到的所述控制信息的大小通过被添加填充比特而大小相异。
可选地，在所述预定义信息包括重复等级/次数的情况下，所述第一确定模块还包括解扰单元，设置为在确定的所述资源上重复接收所述控制信息的情况下，至少根据所述重复等级/次数解扰所述控制信息。
可选地，所述解扰单元，还设置为在重复传输所述控制信息/其他信息的情况下，在各子帧上解扰所述控制信息/所述其他信息所使用的扰码保持相同；和/或所述解扰单元，还设置为在重复传输除控制信息之外的其他信息的情况下，在各子帧上解扰所述其他信息所使用的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
可选地，所述解扰单元，还设置为至少还根据无线帧号解扰所述控制信息。
可选地，所述解扰单元，还设置为至少根据不同的所述重复等级/次数计算得到不同的扰码初始值cinit。
可选地，所述解扰单元，还设置为根据不同的所述重复等级/次数截取不同位置的扰码c(n)。
可选地，所述第一确定模块还包括：解循环移位单元，设置为在所述资源上接收所述控制信息的情况下，至少根据所述重复等级/次数对所述控制信息进行解循环移位。
可选地，所述接收模块在所述资源上接收所述控制信息的情况下，所述控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与所述控制信息的起始子帧的第二位置的距离为固定值，或者所述第一位置与所述第二位置的距离通过高层信令指示，其中，所述固定值不小于所述控制信息的重复次数。
通过本发明实施例，采用基站根据预定义信息，确定重复发送控制信息的资源，其中，预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；基站在确定的资源上重复发送控制信息的方式，解决了不同重复次数传输的情况下覆盖增强的MTC终端无法正确接收检测控制信道的问题，从而保证终端设备的正常通信需求。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的控制信息的传输方法的流程示意图；
图2是根据本发明实施例的另一控制信息的传输方法的流程示意图；
图3是根据本发明实施例的控制信息的传输装置的结构示意图；
图4是根据本发明实施例的另一控制信息的传输装置的结构示意图；
图5是根据本发明优选实施例的控制信息重复等级/次数与业务信息起始位置示意图；
图6是根据本发明优选实施例的控制信息重复传输与业务信息重复传输示意图。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。
为了在不同重复次数传输的情况下使得覆盖增强的MTC终端可以正确接收检测控制信道，本发明提出了一种适用于覆盖增强MTC终端的控制信息传输方法，以解决有覆盖增强需求的终端用户接收检测具有不同重复次数传输的控制信道问题，保证终端设备的正常通信需求。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行，并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
本实施例提供了一种控制信息的传输方法，用于网络侧。图1是根据本发明实施例的控制信息的传输方法的流程示意图，如图1所示，该流程包括如下步骤：
步骤S102，基站根据预定义信息，确定重复发送控制信息的资源，其中，预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；
步骤S104，基站在确定的资源上重复发送控制信息。
通过上述步骤，基站根据预定义信息确定重复发送控制信息的资源，在该资源上发送控制信息，其中，预定义信息至少包括以下之一：覆盖等级、重复等级/次数、聚合等级。相较于现有技术，用户设备根据预定义信息采用相同的策略确定基站发送控制信息的资源，从而使得用户设备可以根据预定义信息确定重复等级/次数，避免了用户设备在尝试了少于基站实际使用的重复次数就解调出控制信息，并且根据间隔k子帧关系接收控制信息所调度的业务信息导致业务信息接收检测错误的问题，解决了不 同重复次数传输的情况下覆盖增强的MTC终端无法正确接收检测控制信道的问题，从而保证终端设备的正常通信需求。
可选地，重复等级/次数与聚合等级至少满足以下关系之一：
聚合等级与重复等级/次数乘积为定值，且该定值对应于覆盖等级；
只有一个聚合等级，一个聚合等级对应多个重复等级/次数；
有多个聚合等级，一个聚合等级对应一个重复等级/次数，不同聚合等级对应的重复等级/次数不全相同；
有多个重复等级/次数，一个重复等级/次数对应一个聚合等级，不同重复等级/次数对应的聚合等级不全相同；
有多个聚合等级，一个聚合等级对应多个重复等级/次数；
有多个重复等级/次数，一个重复等级/次数对应多个聚合等级；
可选地，在步骤S102中，基站在用户设备的接入过程中，根据第一预定义信息确定重复发送控制信息的资源，其中，第一预定义信息中的重复等级/次数和聚合等级满足上述的关系之一；以及基站在与用户设备建立RRC连接后，根据第二预定义信息确定重复发送控制信息的资源，其中，第二预定义信息中的重复等级/次数和聚合等级满足上述的关系之一。其中，重复等级/次数与聚合等级对应关系在接入过程中和RRC建立后可以相同，也可以不同。
可选地，在资源上发送控制信息时，对控制信息添加填充比特(例如0bit)，该填充比特可以不携带任何数据信息，其作用是使得不同重复次数时的下行控制信息(DCI)的大小(size)不同。
可选地，在资源上发送控制信息时，控制信息至少根据重复等级/次数进行加扰。其中，重复等级/次数可以根据上述的关系之一确定。
可选地，重复传输发送控制信息时，所添加的扰码需要保证重复传输的各个子帧上保持相同。
可选地，重复传输发送其他信息时，所使用的扰码也需要保证重复传输的各个子帧上保持相同；或者连续四个子帧内不同，重复传输的各个四个子帧组使用相同扰码。
其中，扰码至少还根据无线帧号确定。
例如：
Figure PCTCN2014088427-appb-000024
Figure PCTCN2014088427-appb-000025
或
Figure PCTCN2014088427-appb-000026
C为常数。此时重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN取k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数。
可选地，根据不同重复等级/次数(RL)计算得到不同加扰序列初始值cinit，从而使得不同重复等级/次数加扰序列不同。
例如：
Figure PCTCN2014088427-appb-000027
或
Figure PCTCN2014088427-appb-000028
其中m优选3或4或5或6，k优选2或3或4。
可选地，根据不同重复等级/次数RL截取不同位置的加扰序列c(n)，从而使得不同重复等级/次数加扰序列不同。
例如：c(n)RL1＝c(n)n＝NRL1,NRL1+1,...,NRL1+MPN-1。
可选地，在资源上发送控制信息时，控制信息至少根据重复等级/次数进行循环移位。
例如：
Figure PCTCN2014088427-appb-000029
或者，
Figure PCTCN2014088427-appb-000030
其中，i＝0,1,…Mquad-1，Mquad表示w(p)(i)序列的长度。
可选地，在资源上发送控制信息，控制信息所指示的业务信息所占用多个子帧的起始子帧位置距离控制信息的起始子帧为固定值或通过高层信令指示，其中，固定值不小于控制信息重复次数。
本实施例还提供了一种控制信息的传输方法，用于终端(即用户设备)侧。图2是根据本发明实施例的另一控制信息的传输方法的流程示意图，如图2所示，该流程包括如下步骤：
步骤S202，用户设备根据预定义信息，确定重复接收控制信息的资源，其中，该预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；
步骤S204，用户设备在确定的资源上重复接收控制信息。
通过上述步骤，终端根据预定义信息确定重复接收控制信息的资源，在资源上接收控制信息，其中，预定义信息至少包括以下之一：覆盖等级、重复等级/次数、聚合等级的方式，相较于现有技术，用户设备根据预定义信息确定基站发送控制信息的资源，从而使得用户设备可以根据预定义信息确定重复等级/次数，避免了用户设备在尝试了少于基站实际使用的重复次数就解调出控制信息，并且根据间隔k子帧关系接收控制信息所调度的业务信息导致业务信息接收检测错误的问题，解决了不同重复次数传输的情况下覆盖增强的MTC终端无法正确接收检测控制信道的问题，从而保证终端设备的正常通信需求。
可选地，重复等级/次数与聚合等级至少满足以下关系之一：
一一对应关系且聚合等级与重复等级/次数乘积为定值；
只有一个聚合等级，一个聚合等级对应多个重复等级/次数；
只有一个重复等级/次数，一个重复等级/次数对应多个聚合等级；
有多个聚合等级，一个聚合等级对应一个重复等级/次数，不同聚合等级对应的重复等级/次数不全相同；
有多个重复等级/次数，一个重复等级/次数对应一个聚合等级，不同重复等级/次数对应的聚合等级不全相同；
有多个聚合等级，一个聚合等级对应多个重复等级/次数；
有多个重复等级/次数，一个重复等级/次数对应多个聚合等级；
可选地，在资源上接收控制信息时，根据接收的不同size大小的控制信息中的比特域，得到本次控制信息所使用的重复等级/次数。其中不同size大小的控制信息通过添加填充比特(例如0bit)区分，使得不同重复次数时的下行控制信息的大小不同。
可选地，在资源上接收控制信息时，控制信息至少根据重复等级/次数进行解扰。
可选地，重复传输接收控制信息时，解调使用的扰码需要保证重复传输的各个子帧上保持相同。
可选地，重复传输接收其他信息时，解调所使用的扰码也需要保证重复传输的各个子帧上保持相同；或者连续四个子帧内不同，重复传输的各个四个子帧组使用相同扰码。
其中，扰码至少还根据无线帧号确定。
例如：
Figure PCTCN2014088427-appb-000031
Figure PCTCN2014088427-appb-000032
或
Figure PCTCN2014088427-appb-000033
C为常数。此时重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN取k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数。
可选地，根据不同重复等级/次数(RL)计算得到不同解扰序列初始值cinit，使得不同重复等级/次数解扰序列不同。
例如：
Figure PCTCN2014088427-appb-000034
或
Figure PCTCN2014088427-appb-000035
其中m优选3或4或5或6，k优选2或3或4。
可选地，根据不同重复等级(RL)截取不同位置的解扰序列c(n)，使得不同重复等级/次数解扰序列不同。
例如：c(n)RL1＝c(n)n＝NRL1,NRL1+1,...,NRL1+MPN-1。
可选地，在资源上接收控制信息时，解调控制信息至少根据重复等级/次数进行解循环移位。
例如：
Figure PCTCN2014088427-appb-000036
或者，
Figure PCTCN2014088427-appb-000037
可选地，在资源上接收控制信息，控制信息所指示的业务信息所占用多个子帧的起始子帧位置距离控制信息的起始子帧为固定值或通过高层信令指示，其中固定值不小于控制信息重复次数。
通过使用本发明上述实施例所提出的控制信息传输方法，通过预定义信息确定频域位置，可以降低覆盖增强MTC终端在重复传输时控制信息的阻塞率，进而保证数据信息的正常发送和接收，减少系统开销以及时延。
本发明实施例还提供了一种控制信息的传输装置用于实现上述应用于网络侧的控制信息的传输方法，该装置位于网络侧，例如基站中。图3是根据本发明实施例的控制信息的传输装置的结构示意图，如图3所示，该装置包括：确定模块32和发送模块34，其中，确定模块32设置为根据预定义信息，确定重复发送控制信息的资源，其中，预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；发送模块34耦合至确定模块32，设置为在确定的资源上重复发送控制信息。
本发明的实施例中所涉及到的模块、单元可以通过软件的方式实现，也可以通过硬件的方式来实现。本实施例中的所描述的模块、单元也可以设置在处理器中，例如，可以描述为：一种处理器包括确定模块32和发送模块34。其中，这些模块的名称在某种情况下并不构成对该模块本身的限定，例如，确定模块32还可以被描述为“设置为根据预定义信息确定重复发送控制信息的资源的模块”。
可选地，重复等级/次数和聚合等级至少满足以下关系之一：聚合等级与重复等级/次数的乘积为定值，且定值对应于覆盖等级；在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；在有多个聚合等级的情况下，一个聚合等级对应多个重复等级/次数；在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
可选地，确定模块32包括：第一确定单元322，设置为在用户设备的接入过程中，根据第一预定义信息确定重复发送控制信息的资源，其中，第一预定义信息中的重复等级/次数和聚合等级满足关系之一；第二确定单元324，设置为在与用户设备建立RRC连接后，根据第二预定义信息确定重复发送控制信息的资源，其中，第二预定义信息中的重复等级/次数和聚合等级满足关系之一。
需要说明的是，本发明实施例中形如：“第一确定单元”和“第二确定单元”中的“第一”和“第二”仅用于从功能上标识这两个单元，而并不用于表示对这些单元在工作、连接顺序上的限定。并且，在某些情况下，这些单元、模块可以合设或者分开设置，在本发明实施例中没有特别说明的情况下，并不加以限制。
可选地，该装置还包括：填充模块36耦合至发送模块34，设置为在不同重复次数将要发送的控制信息中添加填充比特，其中，不同重复次数发送的控制信息的大小相异。
可选地，在预定义信息包括重复等级/次数的情况下，发送模块34还包括加扰单元346，设置为在确定的资源上重复发送控制信息的情况下，至少根据重复等级/次数加扰控制信息。
可选地，加扰单元346，还设置为在重复传输控制信息/其他信息的情况下，在各子帧上加扰控制信息/其他信息所添加的扰码保持相同；和/或加扰单元346，还设置为在重复传输除控制信息之外的其他信息的情况下，在各子帧上加扰其他信息所添加的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
可选地，加扰单元346，还设置为至少还根据无线帧号加扰控制信息。
可选地，加扰单元346，还设置为至少根据不同的重复等级/次数计算得到不同的扰码初始值cinit。
可选地，加扰单元346，还设置为根据不同的重复等级/次数截取不同位置的扰码c(n)。
可选地，发送模块34还包括循环移位单元348，设置为在资源上发送控制信息的情况下，至少根据重复等级/次数对控制信息进行循环移位。
可选地，发送模块34在资源上发送控制信息的情况下，控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与控制信息的起始子帧的第二位置的距离为固定值，或者第一位置与第二位置的距离通过高层信令指示，其中，固定值不小于控制信息的重复次数。
本发明实施例还提供了另一种控制信息的传输装置用于实现上述应用于终端侧的控制信息的传输方法，该装置位于终端(用户设备)侧，例如用户设备中。图4是根据本发明实施例的控制信息的传输装置的结构示意图，如图4所示，该装置包括：第一确定模块42和接收模块44，其中，第一确定模块42，设置为根据预定义信息，确定重复接收控制信息的资源，其中，预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；接收模块44耦合至第一确定模块42，设置为在确定的资源上重复接收控制信息。
可选地，重复等级/次数和聚合等级至少满足以下关系之一：聚合等级与重复等级/次数的乘积为定值，且定值对应于覆盖等级；在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；在有多个聚合 等级的情况下，一个聚合等级对应多个重复等级/次数；在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
可选地，该装置还包括：第二确定模块46，设置为根据接收到的控制信息中的比特域，确定控制信息所使用的重复等级/次数，其中，不同重复次数接收到的控制信息的大小通过被添加填充比特而大小相异。
可选地，在预定义信息包括重复等级/次数的情况下，第一确定模块42还包括解扰单元422，设置为在确定的资源上重复接收控制信息的情况下，至少根据重复等级/次数解扰控制信息。
可选地，解扰单元422，还设置为在重复传输控制信息/其他信息的情况下，在各子帧上解扰控制信息/其他信息所使用的扰码保持相同；和/或解扰单元422，还设置为在重复传输除控制信息之外的其他信息的情况下，在各子帧上解扰其他信息所使用的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
可选地，解扰单元422，还设置为至少还根据无线帧号解扰控制信息。
可选地，解扰单元422，还设置为至少根据不同的重复等级/次数计算得到不同的扰码初始值cinit。
可选地，解扰单元422，还设置为根据不同的重复等级/次数截取不同位置的扰码c(n)。
可选地，第一确定模块42还包括：解循环移位单元424，设置为在资源上接收控制信息的情况下，至少根据重复等级/次数对控制信息进行解循环移位。
可选地，接收模块44在资源上接收控制信息的情况下，控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与控制信息的起始子帧的第二位置的距离为固定值，或者第一位置与第二位置的距离通过高层信令指示，其中，固定值不小于控制信息的重复次数。
为使本发明的技术方案更加清楚明白，下面结合附图和具体实施例对本发明进一步详细阐述。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的各种方式可以相互组合。
由于重复传输次数并不一定是固定值，例如根据信道状况或者终端位置变化导致覆盖性能变化，进而使用重复传输的次数也随之变化，这样终端在接收检测控制信息时，除了检测不同聚合等级，还面临着检测重复次数的问题，进而需要确定控制信息所指示的业务信息的位置。如果基站侧使用较大的重复次数传输控制信息，而终端在尝试了少于基站实际使用的重复次数就解调出控制信息，并且根据间隔k子帧关系接收控制信息所调度的业务信息，这样就导致业务信息接收检测错误，导致基站传输数据给终端的通信过程失败。因此需要进一步对重复传输时接收检测进行设计。
基站根据预定义信息确定重复发送控制信息的资源，这里也可以成为总聚合资源，在资源上发送控制信息，其中，预定义信息至少包括以下之一：覆盖等级、重复等级/次数、聚合等级。
可选地，覆盖等级(CL)为根据覆盖场景需求不同将最大覆盖需求所对应的性能要求定义为最大覆盖等级，假设最大覆盖目标为覆盖提升15dB(或20dB)，假设覆盖等级有3个，则最大覆盖等级CL3对应于最大覆盖需求所对应的性能要求覆盖提升15dB，CL2对应于10dB，CL1对应于5dB。重复等级/次数与覆盖等级对应，例如，重复等级(RL)3对应于覆盖等级CL3，重复等级(RL)2对应于覆盖等级CL2，重复等级(RL)1对应于覆盖等级CL1，这里也可以把重复等级换为重复次数(RT)，如重复次数RT3对应于覆盖等级CL3，重复次数RT2对应于覆盖等级CL2，重复次数RT1对应于覆盖等级CL1。聚合等级为控制信道的各个聚合等级(AL)，如AL1、2、4、8分别为1CCE、2CCE、4CCE和8CCE。
总聚合资源为单一值或多个值。
优选地，总聚合资源为单一值时，重复等级/次数与聚合等级为一一对应关系。
可选地，如表3所示，总聚合资源(Total Aggregation Resource，简称为TAR)为单一值，即该TAR对应的重复等级(RL)与聚合等级(AL)的资源总和为单一值，例如重复等级(RL)3(例如重复8次)对应AL2，RL2(例如重复4次)对应AL4，RL1(例如重复2次)对应AL8，此时TAR为16CCE。此时盲检次数取决于重复等级(或聚合等级)的数量。适合覆盖增强场景信道状态基本不变的场景。具有一定的调度灵活性。定时关系固定或可变，且不会出现由于盲检重复等级判断错误导致定时关系判断错误的情况(原因是较小的重复等级与较大的重复等级使用的聚合等级不同)。
表3
TAR(CCE) AL(CCE) RL(times)
16 8 2
16 4 4
16 2 8
优选地，总聚合资源为多个值时，重复等级/次数与聚合等级为预定义关系，至少为以下六种之一：
总聚合资源(TAR)为多个值，即此时重复等级(RL)与聚合等级(AL)的资源总和为多个值。
一、如表4所示，TAR有多个值且只有1个AL，一个AL对应多个RL。此时盲检次数取决于重复等级的数量。适合覆盖增强场景信道状态变化的场景。无调度灵活性。定时关系固定或可变，会出现由于盲检重复等级判断错误导致定时关系判断错误的情况。
表4
TAR(CCE) AL(CCE) RL(times)
16 8 2
32 8 4
64 8 8
二、如表5所示，TAR有多个值且只有1个RL，一个RL对应多个AL。此时盲检次数取决于聚合等级的数量。适合覆盖增强场景信道状态变化的场景。具有一定的调度灵活性。定时关系固定，且不会出现由于盲检重复等级判断错误导致定时关系判断错误的情况。此种情况符合现有协议盲检。
表5
TAR(CCE) AL(CCE) RL(times)
64 8 8
32 4 8
16 2 8
三、如表6所示，TAR有多个值且有多个AL，一个AL对应一个TAR，且对应一个RL，不同AL对应的RL不全相同。此时盲检次数取决于聚合等级的数量。适合覆盖增强场景信道状态变化的场景。具有一定的调度灵活性。定时关系固定或可变，不会出现由于盲检重复等级判断错误导致定时关系判断错误的情况。
表6
TAR(CCE) AL(CCE) RL(times)
64 8 8
16 4 4
8 2 4
四、如表7所示，TAR有多个值且有多个RL，一个RL对应一个TAR，且对应一个AL，不同RL对应的AL不全相同。此时盲检次数取决于重复等级的数量。适合覆盖增强场景信道状态变化的场景。具有一定的调度灵活性。定时关系固定或可变，会出现由于盲检重复等级判断错误导致定时关系判断错误的情况。
表7
TAR(CCE) AL(CCE) RL(times)
64 8 8
16 4 4
8 4 2
五、TAR有多个值且有多个AL，一个AL对应多个TAR，一个AL对应多个RL。此时盲检次数取决于重复等级和聚合等级对应关系的数量。适合覆盖增强场景信道状态变化的场景。具有一定的调度灵活性。定时关系固定或可变，会出现由于盲检重复等级判断错误导致定时关系判断错误的情况。
例如：如表8所示，表示了不同AL对应TAR相同的情况。
表8
TAR(CCE) AL(CCE) RL(times)
16 8 2
32 8 4
16 4 4
32 4 8
例如，如表9所示，表示了不同AL对应TAR不同的情况。
表9
TAR(CCE) AL(CCE) RL(times)
64 8 8
32 8 4
32 4 8
8 4 2
六、TAR有多个值且有多个RL，一个RL对应多个TAR，一个RL对应多个AL。此时盲检次数取决于重复等级和聚合等级对应关系的数量。适合覆盖增强场景信道状态变化的场景。具有一定的调度灵活性。定时关系固定或可变，会出现由于盲检重复等级判断错误导致定时关系判断错误的情况。
例如，如表10所示，表示了不同RL对应TAR相同的情况。
表10
TAR(CCE) AL(CCE) RL(times)
16 8 2
8 4 2
16 4 4
8 2 4
例如，如表11所示，表示了不同RL对应TAR不同的情况。
表11
TAR(CCE) AL(CCE) RL(times)
16 8 2
8 4 2
32 8 4
8 2 4
可选地，在资源上发送控制信息时，对控制信息添加0bit，使得不同重复次数时的下行控制信息的大小(DCI size)不同。其中，0bit的长度与所使用的重复等级/次数为对应关系。
可选地，对控制信息添加0bit，根据不同重复等级/次数添加的全0比特数量不同，例如RL1添加1个0比特，RL2添加2个0比特，RL3添加3个0比特，以使得各个重复等级在使用相同DCI格式时的DCI size不同。
优选地，在资源上发送控制信息时，控制信息至少根据重复等级/次数进行加扰。
优选地，重复传输发送控制信息时，所添加的扰码需要保证重复传输的各个子帧上保持相同。同理重复传输发送其他信息时，所使用的扰码也需要保证重复传输的各个子帧上保持相同；或者连续四个子帧内不同，重复传输的各个四个子帧组使用相同 扰码。这样使得重复传输的信息在接收端可以较容易地合并解码。其中扰码至少还根据无线帧号确定。
例如：
Figure PCTCN2014088427-appb-000038
Figure PCTCN2014088427-appb-000039
或
Figure PCTCN2014088427-appb-000040
C为常数。此时重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN取k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数。
更进一步，根据不同重复等级/次数(RL)计算得到不同加扰序列初始值cinit，使得不同重复等级/次数加扰序列不同。这样使得接收端可以较为容易地区分使用不同重复等级传输的信息。
例如：
Figure PCTCN2014088427-appb-000041
或
Figure PCTCN2014088427-appb-000042
其中m优选3或4或5或6，k优选2或3或4。
可选地，根据不同重复等级/次数(RL)截取不同位置的加扰序列c(n)，使得不同重复等级/次数加扰序列不同。这样使得接收端可以较为容易地区分使用不同重复等级传输的信息。
例如：c(n)RL1＝c(n)n＝NRL1,NRL1+1,...,NRL1+MPN-1
可选地，在资源上发送控制信息时，控制信息至少根据重复等级/次数进行循环移位。这样使得接收端可以较为容易地区分使用不同重复等级传输的信息。
例如：
Figure PCTCN2014088427-appb-000043
可选地，在资源上发送控制信息，控制信息所指示的业务信息所占用多个子帧的起始子帧位置距离控制信息的起始为固定值，且该固定值不小于控制信息重复次数。这样使得接收端确定业务信道与控制信道定时关系时不会判断错误。如图5所示。
可选地，在资源上发送控制信息，子帧控制信息所指示的业务信息所占用多个子帧的起始子帧位置距离控制信息的起始子帧通过高层信令指示。这样使得接收端确定业务信道与控制信道定时关系时不会判断错误。如图6所示。
可选地，假设CSS中消息通过使用最大的重复等级发送，而USS中由于各个UE的业务不同盲检重复等级需求更明显一些，此时在RRC连接建立后通过一个RRC信 令指示定时关系(k表示PDSCH起始子帧与(E)PDCCH结束子帧的间距)和业务信道的重复等级。如表12所示。
表12单一聚合等级盲检重复等级时的定时关系
RRC信令索引 PDSCH重复等级 PDSCH-(E)PDCCH定时关系
1 RL1 k＝1
2 RL2 k＝9
3 RL3 k＝13
实施例1
本实施例对控制信息传输采用本发明所提供的方法进行详细描述说明。
基站根据覆盖等级、重复等级、聚合等级确定重复发送控制信息的总聚合资源，在资源上发送控制信息。如表13所示，此时总聚合资源(TAR)使用多个值且只有1个AL，存在3种RL1-3重复等级，使用多个总聚合资源中的一种，使用表中AL4与RL4进行传输。
表13
TAR(CCE) AL(CCE) RL(times)
8 4 2
16 4 4
32 4 8
控制信息处理中添加扰码时，将重复等级(RL)作为计算加扰序列初始值cinit中的一项，使得不同重复等级/次数加扰序列不同。并且所添加的扰码需要保证重复传输的各个子帧上保持相同。扰码序列的初始值为
Figure PCTCN2014088427-appb-000044
Figure PCTCN2014088427-appb-000045
或
Figure PCTCN2014088427-appb-000046
C为常数。此时重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN取k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数。
加扰后的控制信息经过调制、循环移位、资源映射后发送至终端。
终端盲检接收控制信息，使用多个值的总聚合资源，需要盲检3个重复等级(RL)，此时盲检次数与重复等级的数量成正比。终端按照不同重复等级分别盲检控制信息，不同重复等级盲检时使用各自的解扰序列，得到相应的控制信息。
通过本实施例，重复传输的控制信息可以通过使用不同的重复等级以适应覆盖变化场景，终端通过盲检重复等级获得控制信息。同时不同重复等级使用不同的扰码，接收检测时不会出现提前解调正确造成所调度的业务信息定时关系判断错误的情况，保证盲检重复等级情况下信息传输正确。
实施例2
本实施例对控制信息传输采用本发明所提供的方法进行详细描述说明。
基站根据覆盖等级、重复等级、聚合等级确定重复发送控制信息的总聚合资源，在资源上发送控制信息。如表14所示，此时覆盖等级(CL)为CL1，使用单一聚合等级，使用表中AL8与RL2进行传输。
表14
TAR(CCE) AL(CCE) RL(times)
16 8 2
16 4 4
16 2 8
终端盲检接收控制信息，使用单一值的总聚合资源，需要盲检3个重复等级(RL)，聚合等级与重复等级一一对应。
通过本实施例，终端通过盲检重复等级获得控制信息。同时不同重复等级与聚合等级一一对应，接收检测时不会出现提前解调正确造成所调度的业务信息定时关系判断错误的情况，保证盲检重复等级情况下信息传输正确。
实施例3
本实施例对控制信息传输采用本发明所提供的方法进行详细描述说明。
基站根据覆盖等级、重复等级、聚合等级确定重复发送控制信息的总聚合资源，在资源上发送控制信息。如表15所示，此时总聚合资源(TAR)使用多个值且有多个RL，一个RL对应一个TAR，且对应一个AL，不同RL对应的AL不全相同。存在3种RL1-3重复等级，使用多个总聚合资源中的一种，使用表中AL8与RL4进行传输。
表15
TAR(CCE) AL(CCE) RL(times)
64 4 16
32 8 4
16 8 2
控制信息处理中添加扰码时，将重复等级(RL)作为计算加扰序列中的一项，使得不同重复等级/次数加扰序列不同。加扰序列为c(n)RL1＝c(n)n＝NRL1,NRL1+1,...,NRL1+MPN-1。并且所添加的扰码需要保证重复传输的各个子帧上保持相同。扰码序列的初始值为
Figure PCTCN2014088427-appb-000047
Figure PCTCN2014088427-appb-000048
或
Figure PCTCN2014088427-appb-000049
C为常数。此时重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN取k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数。
加扰后的控制信息经过调制、循环移位、资源映射后发送至终端。
终端盲检接收控制信息，使用多个值的总聚合资源，需要盲检3个重复等级(RL)，此时盲检次数与重复等级的数量成正比。终端按照不同重复等级分别盲检控制信息，不同重复等级盲检时使用各自的解扰序列，得到相应的控制信息。
通过本实施例，重复传输的控制信息可以通过使用不同的重复等级以适应覆盖变化场景，终端通过盲检重复等级获得控制信息。同时不同重复等级使用不同的扰码，接收检测时不会出现提前解调正确造成所调度的业务信息定时关系判断错误的情况，保证盲检重复等级情况下信息传输正确。
实施例4
本实施例对控制信息传输采用本发明所提供的方法进行详细描述说明。
基站根据覆盖等级、重复等级、聚合等级确定重复发送控制信息的总聚合资源，在所述资源上发送所述控制信息。如表16所示，此时总聚合资源(TAR)使用多个值且有多个AL，一个AL对应多个TAR，一个AL对应多个RL，不同AL对应TAR相同。存在3种RL1-3重复等级，使用多个总聚合资源中的一种，使用表中AL8与RL4进行传输。
表16
TAR(CCE) AL(CCE) RL(times)
64 8 8
32 8 4
64 4 16
32 4 8
控制信息处理中添加扰码时，所添加的扰码需要保证重复传输的各个子帧上保持相同。扰码序列的初始值为
Figure PCTCN2014088427-appb-000050
Figure PCTCN2014088427-appb-000051
或
Figure PCTCN2014088427-appb-000052
C为常数。此时重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN取k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数。
加扰后的控制信息经过调制、循环移位，其中控制信息进行循环移位时根据重复等级/次数进行修订
Figure PCTCN2014088427-appb-000053
之后再进行资源映射后发送至终端。
终端盲检接收控制信息，使用多个值的总聚合资源，需要盲检3个重复等级(RL)，此时盲检次数与重复等级和聚合等级的对应关系数量成正比。终端按照不同重复等级分别盲检控制信息，不同重复等级盲检时使用各自的循环移位解调，得到相应的控制信息。
通过本实施例，重复传输的控制信息可以通过使用不同的重复等级以适应覆盖变化场景，终端通过盲检重复等级获得控制信息。同时不同重复等级使用不同的循环移位，接收检测时不会出现提前解调正确造成所调度的业务信息定时关系判断错误的情况，保证盲检重复等级情况下信息传输正确。
工业实用性
通过本发明实施例，采用基站根据预定义信息，确定重复发送控制信息的资源，其中，预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；基站在确定的资源上重复发送控制信息的方式，解决了不同重复次数传输的情况下覆盖增强的MTC终端无法正确接收检测控制信道的问题，从而保证终端设备的正常通信需求。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (50)

  1. 一种控制信息的传输方法，包括：
    基站根据预定义信息，确定重复发送控制信息的资源，其中，所述预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；
    所述基站在确定的所述资源上重复发送所述控制信息。
  2. 根据权利要求1所述的方法，其中，所述重复等级/次数和所述聚合等级至少满足以下关系之一：
    聚合等级与重复等级/次数的乘积为定值，且所述定值对应于覆盖等级；
    在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；
    在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；
    在有多个聚合等级的情况下，一个聚合等级对应多个重复等级/次数；
    在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；
    在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
  3. 根据权利要求2所述的方法，其中，基站根据预定义信息，确定重复发送控制信息的资源包括：
    所述基站在用户设备的接入过程中，根据第一预定义信息确定重复发送所述控制信息的资源，其中，所述第一预定义信息中的重复等级/次数和聚合等级满足所述关系之一；
    所述基站在与用户设备建立RRC连接后，根据第二预定义信息确定重复发送所述控制信息的资源，其中，所述第二预定义信息中的重复等级/次数和聚合等级满足所述关系之一。
  4. 根据权利要求1所述的方法，其中，所述基站在确定的所述资源上重复发送所述控制信息之前，所述方法还包括：
    所述基站在不同重复次数将要发送的所述控制信息中添加填充比特，其中，不同重复次数发送的所述控制信息的大小相异。
  5. 根据权利要求1所述的方法，其中，在所述预定义信息包括重复等级/次数的情况下，所述基站在确定的所述资源上重复发送所述控制信息的情况下，至少根据所述重复等级/次数加扰所述控制信息。
  6. 根据权利要求5所述的方法，其中，
    所述基站在重复传输所述控制信息/其他信息的情况下，在各子帧上加扰所述控制信息/所述其他信息所添加的扰码保持相同；和/或
    所述基站在重复传输除控制信息之外的其他信息的情况下，在各子帧上加扰所述其他信息所添加的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
  7. 根据权利要求6所述的方法，其中，所述基站至少还根据无线帧号加扰所述控制信息。
  8. 根据权利要求7所述的方法，其中，所述基站加扰所述控制信息的扰码cinit根据下列公式确定：
    Figure PCTCN2014088427-appb-100001
    或
    Figure PCTCN2014088427-appb-100002
    其中，C为常数，重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN为k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数，
    Figure PCTCN2014088427-appb-100003
    表示小区识别码。
  9. 根据权利要求5所述的方法，其中，所述基站至少根据所述重复等级/次数加扰所述控制信息包括：
    所述基站至少根据不同的所述重复等级/次数计算得到不同的扰码初始值cinit。
  10. 根据权利要求9所述的方法，其中，所述基站加扰所述控制信息的扰码初始值cinit根据下列公式确定：
    Figure PCTCN2014088427-appb-100004
    或者
    Figure PCTCN2014088427-appb-100005
    其中，
    Figure PCTCN2014088427-appb-100006
    或
    Figure PCTCN2014088427-appb-100007
    C为常数，重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN为k0所在子帧的无线帧号，h为无线帧中可 用的下行子帧数量，N为重复传输次数，m、k为自然数，NRL表示重复等级/次数的数值，
    Figure PCTCN2014088427-appb-100008
    表示小区识别码。
  11. 根据权利要求5所述的方法，其中，所述基站至少根据所述重复等级/次数加扰所述控制信息包括：
    所述基站根据不同的所述重复等级/次数截取不同位置的扰码c(n)。
  12. 根据权利要求11所述的方法，其中，所述基站加扰所述控制信息的扰码c(n)根据下列公式确定：
    c(n)RL1＝c(n)n＝NRL1,NRL1+1,...,NRL1+MPN-1；
    其中，RL表示重复等级/次数，NRL表示重复等级/次数的数值，MPN表示c(n)序列的长度。
  13. 根据权利要求1所述的方法，其中，所述基站在确定的所述资源上重复发送所述控制信息包括：
    所述基站在所述资源上发送所述控制信息的情况下，至少根据所述重复等级/次数对所述控制信息进行循环移位。
  14. 根据权利要求13所述的方法，其中，所述基站对所述控制信息进行循环移位根据下列公式确定：
    Figure PCTCN2014088427-appb-100009
    或者，
    Figure PCTCN2014088427-appb-100010
    其中，i＝0,1,…Mquad-1，Mquad表示w(p)(i)序列的长度。
  15. 根据权利要求1至14中任一项所述的方法，其中，所述基站在所述资源上发送所述控制信息的情况下，所述控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与所述控制信息的起始子帧的第二位置的距离为固定值，或者所述第一位置与所述第二位置的距离通过高层信令指示，其中，所述固定值不小于所述控制信息的重复次数。
  16. 一种控制信息的传输方法，包括：
    用户设备根据预定义信息，确定重复接收控制信息的资源，其中，所述预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；
    所述用户设备在确定的所述资源上重复接收所述控制信息。
  17. 根据权利要求16所述的方法，其中，所述重复等级/次数和所述聚合等级至少满足以下关系之一：
    聚合等级与重复等级/次数的乘积为定值，且所述定值对应于覆盖等级；
    在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；
    在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；
    在有多个聚合等级的情况下，一个聚合等级对应多个重复等级/次数；
    在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；
    在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
  18. 根据权利要求16所述的方法，其中，在所述用户设备在确定的所述资源上重复接收所述控制信息之后，所述方法还包括：
    所述用户设备根据接收到的所述控制信息中的比特域，确定所述控制信息所使用的重复等级/次数，其中，不同重复次数接收到的所述控制信息的大小通过被添加填充比特而大小相异。
  19. 根据权利要求16所述的方法，其中，在所述预定义信息包括重复等级/次数的情况下，所述用户设备在确定的所述资源上重复接收所述控制信息的情况下，至少根据所述重复等级/次数解扰所述控制信息。
  20. 根据权利要求19所述的方法，其中，
    所述用户设备在重复传输所述控制信息/其他信息的情况下，在各子帧上解扰所述控制信息/所述其他信息所使用的扰码保持相同；和/或
    所述用户设备在重复传输除控制信息之外的其他信息的情况下，在各子帧上解扰所述其他信息所使用的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
  21. 根据权利要求20所述的方法，其中，所述用户设备至少还根据无线帧号解扰所述控制信息。
  22. 根据权利要求21所述的方法，其中，所述用户设备解扰所述控制信息的扰码cinit根据下列公式确定：
    Figure PCTCN2014088427-appb-100011
    或
    Figure PCTCN2014088427-appb-100012
    其中，C为常数，重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN为k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数，
    Figure PCTCN2014088427-appb-100013
    表示小区识别码。
  23. 根据权利要求19所述的方法，其中，所述用户设备至少根据所述重复等级/次数解扰所述控制信息包括：
    所述用户设备至少根据不同的所述重复等级/次数计算得到不同的扰码初始值cinit。
  24. 根据权利要求23所述的方法，其中，所述用户设备解扰所述控制信息的扰码初始值cinit根据下列公式确定：
    Figure PCTCN2014088427-appb-100014
    或者
    Figure PCTCN2014088427-appb-100015
    其中，
    Figure PCTCN2014088427-appb-100016
    或
    Figure PCTCN2014088427-appb-100017
    C为常数，重复传输的各子帧k为k0,k0+1,...,k0+N-1，SFN为k0所在子帧的无线帧号，h为无线帧中可用的下行子帧数量，N为重复传输次数，m、k为自然数，NRL表示重复等级/次数的数值，
    Figure PCTCN2014088427-appb-100018
    表示小区识别码。
  25. 根据权利要求19所述的方法，其中，所述用户设备站至少根据所述重复等级/次数解扰所述控制信息包括：
    所述用户设备根据不同的所述重复等级/次数截取不同位置的扰码c(n)。
  26. 根据权利要求25所述的方法，其中，所述用户设备解扰所述控制信息的扰码c(n)根据下列公式确定：
    c(n)RL1＝c(n)n＝NRL1,NRL1+1,...,NRL1+MPN-1；
    其中，RL表示重复等级/次数，NRL表示重复等级/次数的数值，MPN表示c(n)序列的长度。
  27. 根据权利要求16所述的方法，其中，所述用户设备在确定的所述资源上重复接收所述控制信息包括：
    所述用户设备在所述资源上接收所述控制信息的情况下，至少根据所述重复等级/次数对所述控制信息进行解循环移位。
  28. 根据权利要求27所述的方法，其中，所述用户设备对所述控制信息进行解循环移位根据下列公式确定：
    Figure PCTCN2014088427-appb-100019
    或者，
    Figure PCTCN2014088427-appb-100020
    其中，i＝0,1,…Mquad-1，Mquad表示w(p)(i)序列的长度。
  29. 根据权利要求16至28中任一项所述的方法，其中，所述用户设备在所述资源上接收所述控制信息的情况下，所述控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与所述控制信息的起始子帧的第二位置的距离为固定值，或者所述第一位置与所述第二位置的距离通过高层信令指示，其中，所述固定值不小于所述控制信息的重复次数。
  30. 一种控制信息的传输装置，位于基站中，包括：
    确定模块，设置为根据预定义信息，确定重复发送控制信息的资源，其中，所述预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；
    发送模块，设置为在确定的所述资源上重复发送所述控制信息。
  31. 根据权利要求30所述的装置，其中，所述重复等级/次数和所述聚合等级至少满足以下关系之一：
    聚合等级与重复等级/次数的乘积为定值，且所述定值对应于覆盖等级；
    在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；
    在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；
    在有多个聚合等级的情况下，一个聚合等级对应多个重复等级/次数；
    在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；
    在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
  32. 根据权利要求31所述的装置，其中，所述确定模块包括：
    第一确定单元，设置为在用户设备的接入过程中，根据第一预定义信息确定重复发送所述控制信息的资源，其中，所述第一预定义信息中的重复等级/次数和聚合等级满足所述关系之一；
    第二确定单元，设置为在与用户设备建立RRC连接后，根据第二预定义信息确定重复发送所述控制信息的资源，其中，所述第二预定义信息中的重复等级/次数和聚合等级满足所述关系之一。
  33. 根据权利要求30所述的装置，其中，所述装置还包括：
    填充模块，设置为在不同重复次数将要发送的所述控制信息中添加填充比特，其中，不同重复次数发送的所述控制信息的大小相异。
  34. 根据权利要求30所述的装置，其中，在所述预定义信息包括重复等级/次数的情况下，所述发送模块还包括加扰单元，设置为在确定的所述资源上重复发送所述控制信息的情况下，至少根据所述重复等级/次数加扰所述控制信息。
  35. 根据权利要求34所述的装置，其中，
    所述加扰单元，还设置为在重复传输所述控制信息/其他信息的情况下，在各子帧上加扰所述控制信息/所述其他信息所添加的扰码保持相同；和/或
    所述加扰单元，还设置为在重复传输除控制信息之外的其他信息的情况下，在各子帧上加扰所述其他信息所添加的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
  36. 根据权利要求35所述的装置，其中，所述加扰单元，还设置为至少还根据无线帧号加扰所述控制信息。
  37. 根据权利要求34所述的装置，其中，所述加扰单元，还设置为至少根据不同的所述重复等级/次数计算得到不同的扰码初始值cinit。
  38. 根据权利要求34所述的装置，其中，所述加扰单元，还设置为根据不同的所述重复等级/次数截取不同位置的扰码c(n)。
  39. 根据权利要求30所述的装置，其中，所述发送模块还包括循环移位单元，设置为在所述资源上发送所述控制信息的情况下，至少根据所述重复等级/次数对所述控制信息进行循环移位。
  40. 根据权利要求30至39中任一项所述的装置，其中，所述发送模块在所述资源上发送所述控制信息的情况下，所述控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与所述控制信息的起始子帧的第二位置的距离为固定值，或者所述第一位置与所述第二位置的距离通过高层信令指示，其中，所述固定值不小于所述控制信息的重复次数。
  41. 一种控制信息的传输装置，位于用户设备中，包括：
    第一确定模块，设置为根据预定义信息，确定重复接收控制信息的资源，其中，所述预定义信息包括以下至少之一：覆盖等级、重复等级/次数、聚合等级；
    接收模块，设置为在确定的所述资源上重复接收所述控制信息。
  42. 根据权利要求41所述的装置，其中，所述重复等级/次数和所述聚合等级至少满足以下关系之一：
    聚合等级与重复等级/次数的乘积为定值，且所述定值对应于覆盖等级；
    在仅有一个聚合等级的情况下，这一个聚合等级对应多个重复等级/次数；
    在有多个聚合等级的情况下，一个聚合等级对应一个重复等级/次数，其中，不同聚合等级对应的重复等级/次数不全相同；
    在有多个聚合等级的情况下，一个聚合等级对应多个重复等级/次数；
    在有多个重复等级/次数的情况下，一个重复等级/次数对应一个聚合等级，其中，不同重复等级/次数对应的聚合等级不全相同；
    在有多个重复等级/次数的情况下，一个重复等级/次数对应多个聚合等级。
  43. 根据权利要求41所述的装置，其中，所述装置还包括：
    第二确定模块，设置为根据接收到的所述控制信息中的比特域，确定所述控制信息所使用的重复等级/次数，其中，不同重复次数接收到的所述控制信息的大小通过被添加填充比特而大小相异。
  44. 根据权利要求41所述的装置，其中，在所述预定义信息包括重复等级/次数的情况下，所述第一确定模块还包括解扰单元，设置为在确定的所述资源上重复接收所述控制信息的情况下，至少根据所述重复等级/次数解扰所述控制信息。
  45. 根据权利要求44所述的装置，其中，
    所述解扰单元，还设置为在重复传输所述控制信息/其他信息的情况下，在各子帧上解扰所述控制信息/所述其他信息所使用的扰码保持相同；和/或
    所述解扰单元，还设置为在重复传输除控制信息之外的其他信息的情况下，在各子帧上解扰所述其他信息所使用的扰码在一组子帧中组内的各子帧不同，而在多组子帧组间采用相同的扰码配置。
  46. 根据权利要求45所述的装置，其中，所述解扰单元，还设置为至少还根据无线帧号解扰所述控制信息。
  47. 根据权利要求44所述的装置，其中，所述解扰单元，还设置为至少根据不同的所述重复等级/次数计算得到不同的扰码初始值cinit。
  48. 根据权利要求44所述的装置，其中，所述解扰单元，还设置为根据不同的所述重复等级/次数截取不同位置的扰码c(n)。
  49. 根据权利要求41所述的装置，其中，所述第一确定模块还包括：
    解循环移位单元，设置为在所述资源上接收所述控制信息的情况下，至少根据所述重复等级/次数对所述控制信息进行解循环移位。
  50. 根据权利要求41至49中任一项所述的装置，其中，所述接收模块在所述资源上接收所述控制信息的情况下，所述控制信息指示的业务信息所占用的多个子帧的起始子帧的第一位置、与所述控制信息的起始子帧的第二位置的距离为固定值，或者所述第一位置与所述第二位置的距离通过高层信令指示，其中，所述固定值不小于所述控制信息的重复次数。
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