WO2014015741A1 - 物理混合重传请求校验指示信道的发送方法、装置及系统 - Google Patents

物理混合重传请求校验指示信道的发送方法、装置及系统 Download PDF

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Publication number
WO2014015741A1
WO2014015741A1 PCT/CN2013/078787 CN2013078787W WO2014015741A1 WO 2014015741 A1 WO2014015741 A1 WO 2014015741A1 CN 2013078787 W CN2013078787 W CN 2013078787W WO 2014015741 A1 WO2014015741 A1 WO 2014015741A1
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WO
WIPO (PCT)
Prior art keywords
phich
user
base station
resource
cell identifier
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PCT/CN2013/078787
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English (en)
French (fr)
Inventor
弓宇宏
戴博
孙云锋
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/417,773 priority Critical patent/US9871626B2/en
Publication of WO2014015741A1 publication Critical patent/WO2014015741A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/1896ARQ related signaling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0466Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1861Physical mapping arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems

Definitions

  • the present invention relates to the field of communications, and in particular to a Physical Hybrid ARQ Indicator Channel (PHICH). Transmission method, device and system. BACKGROUND OF THE INVENTION In the Evolved Universal Terrestrial Radio Access (E-UTRA) system of the 3th Generation Partner Project (3GPP), data transmission/reception support hybrid automatic Hybrid Automatic Repeat Request (HARQ) technology to reduce data transmission delay and obtain higher data transmission rate.
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • 3GPP 3th Generation Partner Project
  • HARQ hybrid automatic Hybrid Automatic Repeat Request
  • the data receiver needs to feed back Acknowledgement/Non-Acknowledgement (ACK/NACK) information to the data sender to help the data sender confirm the correct reception of the data receiver.
  • ACK/NACK Acknowledgement/Non-Acknowledgement
  • the base station In the downlink direction of the 3GPP E-UTRA system, the base station (for example, the eNodeB) uses a Physical Hybrid ARQ Indicator Channel (PHICH) to the User Equipment (User Equipment, UE for short).
  • PHICH Physical Hybrid ARQ Indicator Channel
  • UE User Equipment
  • the ACK/NACK information received by the uplink data is fed back, that is, the base station (e.g., eNodeB) transmits ACK/NACK information to the UE whether it correctly receives the data transmission block from the UE.
  • the transmission of the PHICH channel of the LTE physical layer is organized in the form of a PHICH group, and multiple PHICH channels in one PHICH group occupy the same time-frequency domain physical resources, and are multiplexed by orthogonal spreading sequences.
  • a normal Cyclic Prefix (Normal CP)
  • a multiplexing factor of 4 combined with I/Q two-way BPSK modulation is used, and one PHICH group includes 12 modulation symbols, occupying 3 Resource Element Group (REG), which multiplexes 8 PHICH channels.
  • REG Resource Element Group
  • the spreading factor is 2 sets of I/Q two-way BPSK modulation multiplexing mode, and one PHICH group includes 6 modulation multiplexing, multiplexing 4 PHICH channels, at this time, 2 PHICH groups jointly occupy 3 REG physical resources.
  • One PHICH channel is determined by the ID ( ) and the intra-group ID ( "TMCH ) of the PHICH group.
  • the index number U CH of the PHICH channel corresponds to the resource location of the uplink data transmission, and is specifically determined by the sequence number of the first PRB of the corresponding Physical Uplink Shared Channel (PUSCH) data.
  • the PHICH corresponding to the adjacent PRB will be mapped to different PHICH groups, and the mathematical relationship of the mapping is -
  • w P se H q ICH ⁇ Indicates the ⁇ row data demodulation pilot 3 ⁇ 4 ⁇ shield ring shift indication, / ⁇ indicates the minimum physical resource block index of the ⁇ row source allocation, and N ai indicates the spreading factor size, indicating the number of PHICH groups.
  • 1 is a schematic diagram of a baseband processing procedure of a PHICH channel according to the related art. As shown in FIG. 1, one bit of ACK/NACK (0/1) information is obtained by repeating coding to obtain 3 bits of encoded information, and then After BPSK modulation and a spreading operation with a coefficient of 4 (" eH "), 12 symbols are obtained, which are mapped to the resource positions of the three REGs corresponding to the PHICH group ( ).
  • FIG. 2 is a schematic diagram of a time-frequency domain mapping of a PHICH channel according to the related art. As shown in FIG. 2, in the frequency domain, three REGs corresponding to one PHICH group adopt a distributed mapping manner to obtain a diversity gain; In terms of time, PHICH has both regular and extended resource mapping methods.
  • FIG. 3 is a schematic diagram of a frequency domain initial offset position relationship of different cells of a PHICH channel according to the related art. As shown in FIG. 3, frequency domain locations of PHICH resources of adjacent cells (different cell IDs) are mutually offset.
  • a method for transmitting a PHICH including: determining, by a base station, a PHICH resource according to a user-specific manner and/or scrambling a PHICH using a current PHICH scrambling code; The scrambled PHICH is sent on the resource.
  • the determining, by the base station, the PHICH resource according to the manner specified by the user includes: determining, by the base station, the frequency domain resource of the PHICH according to the cell identifier specified by the user.
  • the base station scrambles the PHICH using the current PHICH scrambling code according to a user-specific manner, including: the base station scrambles the PHICH using the current PHICH scrambling code according to the user-specific cell identifier.
  • the method further includes: the base station controls the RRC signaling to the user-specific cell by using the user-specific radio resource.
  • the identification is notified to the user terminal.
  • the user-specific cell identifier is a user-specific cell identifier used to determine a physical downlink demodulation reference signal.
  • the base station determines the frequency domain resources of the PHICH in the subframes 1 and 6 of the multicast single frequency network subframe or the time division duplex system according to the following manner:
  • N indicates the user-specific cell identifier, and the physical control format indication channel in the 'th symbol
  • the base station determines the frequency domain resources of the PHICH other than the subframes 1 and 6 in the multicast single frequency network subframe and the time division duplex system according to the following manner: 0
  • N represents the user-specific cell identity
  • 3 ⁇ 4 is the physical control format indicator channel in the 'th symbol
  • the method further includes: the user terminal descrambles the received scrambled PHICH according to the user-specific cell identifier to which the user belongs.
  • the base station does not send a physical downlink control channel to the user on the PHICH resource to which the user belongs, and after the base station sends the scrambled PHICH on the determined PHICH resource, the method further includes: receiving the user terminal of the scrambled PHICH The physical downlink control channel is not monitored or received on the PHICH resource to which it belongs.
  • the base station does not send the physical downlink control channel on the PHICH resource, and after the base station sends the scrambled PHICH on the determined PHICH resource, the method further includes: the user terminal receiving the scrambled PHICH is not listening on the PHICH resource. Or receive a physical downlink control channel.
  • a PHICH transmitting apparatus located at a base station side, the transmitting apparatus comprising: a pre-processing module configured to determine PHICH resources and/or use a current PHICH according to a user-specific manner The scrambling code scrambles the PHICH; the sending module is configured to send the scrambled PHICH on the determined PHICH resource.
  • the pre-processing module is further configured to determine a frequency domain resource of the PHICH according to the user-specific cell identifier.
  • the pre-processing module is further arranged to scramble the PHICH using the current PHICH scrambling code according to the user-specific cell identity.
  • the apparatus further comprises: a notification module, configured to notify the user terminal of the user-specific cell identifier by the user-specific radio resource control RRC signaling.
  • the user-specific cell identifier is a user-specific cell identifier used to determine a physical downlink demodulation reference signal.
  • the pre-processing module is further configured to determine the frequency domain resources of the PHICH in the multicast single frequency network subframe or the time division duplex system subframes 1 and 6 in the case that the PHICH is in an extended form:
  • the pre-processing module is further configured to determine the frequency domain resources of the PHICHs other than the subframes 1 and 6 in the multicast single frequency network subframe and the time division duplex system in the case that the PHICH is in the non-extended form. :
  • the pre-processing module is further configured to determine the scrambling code of the PHICH as follows:
  • a user terminal including: a receiving module, configured to receive a scrambled PHICH from a base station, where the scrambled PHICH is a user-specific The PHICH transmitted on the mode determined PHICH resource, and/or the scrambled PHICH is obtained by the base station scrambling the PHICH using the current PHICH scrambling code in a user-specific manner.
  • the user terminal further includes: a descrambling code module, configured to perform descrambling on the received scrambled PHICH according to the user-specific cell identifier to which the user belongs.
  • the receiving module is further configured to: when the base station does not send the physical downlink control channel to the user on the PHICH resource to which the user belongs, and send the scrambled PHICH on the determined PHICH resource, the PHICH resource that is not in the user terminal Monitor or receive the physical downlink control channel.
  • the receiving module is further configured to not listen to or receive the physical downlink control channel on the PHICH resource if the base station does not send the physical downlink control channel on the PHICH resource and transmit the scrambled PHICH on the determined PHICH resource.
  • a PHICH transmission system including: the PHICH transmission apparatus and the user terminal.
  • the method for determining the PHICH resource and/or the scrambling of the PHICH in a user-specific manner is adopted, which solves the problem that the single-cell accommodates users in the related art is far larger than the traditional cell, resulting in insufficient PHICH capacity and PHICH collision.
  • FIG. 1 is a schematic diagram of a baseband processing procedure of a PHICH channel according to the related art
  • FIG. 2 is a schematic diagram of a time-frequency domain mapping of a PHICH channel according to the related art
  • FIG. 3 is a different cell of a PHICH channel according to the related art.
  • FIG. 4 is a flowchart of a method for transmitting a physical hybrid retransmission request check indication channel according to an embodiment of the present invention.
  • FIG. 5 is a physical hybrid retransmission request school according to an embodiment of the present invention;
  • a structural block diagram of a transmitting device for indicating an indication channel; 6 is a structural block diagram of a transmitting apparatus of a physical hybrid retransmission request check indication channel according to a preferred embodiment of the present invention;
  • FIG. 7 is a structural block diagram of a user terminal according to an embodiment of the present invention;
  • FIG. 8 is a block diagram of a preferred embodiment according to the present invention.
  • FIG. 9 is a structural block diagram of a transmission system of a physical hybrid retransmission request check indication channel according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of PHICH interference in a Soft Cell scenario according to Embodiment 13 of the present invention
  • BEST MODE FOR CARRYING OUT THE INVENTION the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. According to an embodiment of the present invention, a method for transmitting a PHICH is provided.
  • FIG. 4 is a flowchart of a method for transmitting a physical hybrid retransmission request check indication channel according to an embodiment of the present invention.
  • the method includes the following steps: Step S402: A base station determines a PHICH resource according to a user-specific manner. / or scrambling the PHICH using the current PHICH scrambling code; step S404, the base station transmits the scrambled PHICH on the determined PHICH resource.
  • the base station determines the PHICH resource and/or the method of scrambling the PHICH according to the user-specific manner, and solves the problem that the single-cell accommodates users in the related art is far larger than the traditional cell, resulting in insufficient PHICH capacity, PHICH collision and interference.
  • the step S402 may be as follows: Mode 1: The base station determines the PHICH resource according to the manner specified by the user.
  • the second method is: the base station uses the current PHICH scrambling code to scramble the PHICH according to the user-specific manner; 3.
  • the base station determines the PHICH resource according to the user-specific manner, and scrambles the PHICH using the current PHICH scrambling code according to the user-specific manner.
  • the base station when the base station adopts modes 2 and 3 to obtain the scrambled PHICH, the user side needs to perform descrambling in a user-specific manner.
  • the user-specific manner adopted by the base station to determine the PHICH resource and the user-specific manner used in scrambling/descrambling may be the same user-specific manner, or two different user-specific manners may be used. the way.
  • the base station may also notify the user terminal of the user-specific cell identifier by using a user-specific radio resource control (Radio Resource Control, RRC for short) signaling.
  • RRC Radio Resource Control
  • the determining, by the base station, the PHICH resource according to the manner specified by the user may include: determining, by the base station, the frequency domain resource of the PHICH according to the cell identifier specified by the user.
  • the base station scrambling the PHICH using the current PHICH scrambling code according to the user-specific manner may include: The base station scrambles the PHICH using the current PHICH scrambling code according to the user-specific cell identifier.
  • the user terminal may perform descrambling on the received scrambled PHICH according to the user-specific cell identifier to which it belongs.
  • the user-specific cell identifier may be a user-specific cell identifier used to determine a physical downlink demodulation reference signal.
  • the base station can determine the PHICH resources and perform scrambling according to the user-specific cell identifier, thereby improving the processing capability of the system.
  • MBSFN multicast/multicast single frequency network
  • the base station may check the frequency domain resources of the indication channel according to the physical hybrid retransmission request determined in the following manner:
  • N v represents a user-specific cell identifier
  • 3 ⁇ 4 is a physical control format indication channel in the 'th symbol
  • the base station may determine the non-extended physical hybrid retransmission request check indication channel according to the following manner.
  • the base station may determine the scrambling code of the physical hybrid retransmission request check indication channel according to the following manner:
  • an embodiment of the present invention further provides a PHICH sending apparatus.
  • 5 is a structural block diagram of a device for transmitting a physical hybrid retransmission request check indication channel according to an embodiment of the present invention.
  • the device 50 is located at a base station side, and includes: a pre-processing module 52, configured to be user-specific.
  • the PHICH resource is determined and/or the PHICH is scrambled using the current PHICH scrambling code;
  • the transmitting module 54 coupled to the pre-processing module 52, is configured to transmit the scrambled PHICH on the determined PHICH resource.
  • the pre-processing module 52 determines the PHICH resource and/or scrambles the PHICH according to the user-specific manner, and the sending module 54 sends the scrambled PHICH on the determined PHICH resource, thereby solving the single-cell method in the related art.
  • the problem that the user is accommodated is far larger than the traditional cell, resulting in insufficient PHICH capacity, PHICH collision and interference, improves the capacity of the physical hybrid retransmission request check indication channel in the downlink resource, and reduces the interference caused by the PHICH collision.
  • the pre-processing module 52 is further configured to determine the PHICH resource of the PHICH according to the user-specific cell identity and/or to scramble the PHICH using the current PHICH scrambling code.
  • FIG. 6 is a structural block diagram of a device for transmitting a physical hybrid retransmission request check indication channel according to a preferred embodiment of the present invention. As shown in FIG. 6, the device 50 further includes: a notification module 62 coupled to the pre-processing module 52, The user-specific cell identifier is notified to the user terminal by the user-specific radio resource control RRC signaling. Preferably, the user-specific cell identifier is a user-specific cell identifier used to determine a physical downlink demodulation reference signal.
  • the pre-processing module 52 is further configured to determine the frequency domain resources of the PHICH in the multicast single frequency network subframe or the time division duplex system subframes 1 and 6 in the case that the PHICH is in the extended form:
  • the pre-processing module 52 is further configured to determine the frequency domain of the PHICH other than the subframes 1 and 6 in the multicast single frequency network subframe and the time division duplex system in the case where the PHICH is in the non-extended form. Resources: 0
  • N represents a user-specific cell identity
  • 3 ⁇ 4 of the first 'REG resource element groups Number of symbols in addition to a physical control format indicator channel (PCFICH) remaining
  • m' is the number of a PHICH group
  • n 0 0 is // ⁇
  • the pre-processing module 52 is further configured to determine the scrambling code of the PHICH as follows: + + 1 ⁇ 2N1 + 1 - 2 + N: Where c mit is the initialization value of the scrambling sequence generator, N is the user-specific cell identifier, and n s is the slot index.
  • the embodiment of the invention further provides a user terminal.
  • FIG. 7 is a structural block diagram of a user terminal according to an embodiment of the present invention.
  • the user terminal 70 includes: a receiving module 72 coupled to the sending module 54 and configured to receive the scrambled PHICH from the base station, where The scrambled PHICH is sent by the base station on the PHICH resource determined according to the user-specific manner, and/or the scrambled PHICH is used by the base station to scramble the PHICH using the current PHICH scrambling code according to the user-specific manner. acquired.
  • FIG. 8 is a structural block diagram of a user terminal according to a preferred embodiment of the present invention. As shown in FIG. 8, the user terminal 70 further includes: a descrambling code module 82 coupled to the receiving module 72, and configured to be specific to the user to which it belongs.
  • the cell identity descrambles the PHICH that has been scrambled.
  • the receiving module 72 is further configured to: when the base station does not send the physical downlink control channel to the user on the PHICH resource to which the user belongs, and if the scrambled PHICH is sent on the determined PHICH resource, the PHICH that is not in the user terminal belongs to The physical downlink control channel is monitored or received on the resource.
  • the receiving module 72 is further configured to not listen to or receive the physical downlink control channel on the PHICH resource if the base station does not send the physical downlink control channel on the PHICH resource and transmit the scrambled PHICH on the determined PHICH resource. .
  • FIG. 9 is a structural block diagram of a transmission system of a physical hybrid retransmission request check indication channel according to an embodiment of the present invention. As shown in FIG. 9, the system includes: the PHICH transmission device 50 and the user terminal 70. The implementation process of the above embodiment will be described in detail below in conjunction with the preferred embodiments and the accompanying drawings.
  • Embodiment 1 This embodiment provides a PHICH transmission method. The flow of the method is as follows: The base station notifies a user of a user-specific cell identifier for PHICH resource determination by user-specific radio resource control (RRC) signaling. The base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user.
  • RRC radio resource control
  • the base station transmits the PHICH on the PHICH frequency domain resource determined above.
  • the user receives the PHICH according to the cell identifier specific to the user.
  • Embodiment 2 This embodiment provides a PHICH sending method. The method is as follows: The base station notifies a user of a user-specific cell identifier for PHICH resource determination by user-specific radio resource control (RRC) signaling.
  • the base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user.
  • the base station transmits the PHICH on the PHICH frequency domain resource determined above.
  • the user receives the PHICH according to the cell identifier specific to the user.
  • Embodiment 3 This embodiment provides a PHICH transmission method. The flow of the method is as follows: The base station notifies a user of a user-specific cell identifier for PHICH resource determination by user-specific radio resource control (RRC) signaling. The base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user. The base station transmits the PHICH on the PHICH frequency domain resource determined above.
  • RRC radio resource control
  • the user receives the PHICH according to the cell identifier specific to the user.
  • the base station does not send the physical downlink control channel on the physical hybrid retransmission request check indication channel; the user does not listen or receive the physical downlink control channel on the physical hybrid retransmission request check indication channel resource.
  • Embodiment 4 This embodiment provides a PHICH transmission method. The flow of the method is as follows: The base station determines a PHICH resource according to a user-specific cell identifier used for downlink demodulation reference signals. The base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user. The base station transmits the PHICH on the PHICH frequency domain resource determined above.
  • Embodiment 5 This embodiment provides a PHICH sending method. The method is as follows: The base station determines a PHICH resource according to a user-specific cell identifier used for a downlink demodulation reference signal. The base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user. The base station transmits the PHICH on the PHICH frequency domain resource determined above. The user receives the PHICH according to the cell identifier specific to the user.
  • Embodiment 6 This embodiment provides a PHICH sending method. The method is as follows: The base station determines a PHICH resource according to a user-specific cell identifier used for downlink demodulation reference signals. The base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user. The base station transmits the PHICH on the PHICH frequency domain resource determined above. The user receives the PHICH according to the cell identifier specific to the user.
  • Embodiment 7 This embodiment provides a PHICH sending method, and the method is as follows: The base station notifies a user of user-specific PHICH resource determination and PHICH scrambling code through user-specific radio resource control (RRC) signaling. Cell identification. The base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user. The base station determines the PHICH channel scrambling code of the user by using the user-specific cell identifier.
  • RRC radio resource control
  • the base station transmits the PHICH channel scrambled in the above manner on the PHICH frequency domain resource determined above.
  • the user receives the PHICH according to the user-specific cell identifier and descrambles the PHICH.
  • Embodiment 8 This embodiment provides a method for transmitting a PHICH. The method is as follows: The base station notifies a user of user-specific for PHICH resource determination and PHICH scrambling by user-specific radio resource control (RRC) signaling. Cell identification.
  • the base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user.
  • the base station determines the PHICH channel scrambling code of the user by using the user-specific cell identifier.
  • the base station transmits the PHICH channel scrambled in the above manner on the PHICH frequency domain resource determined above.
  • the user receives the PHICH according to the user-specific cell identifier and descrambles the PHICH.
  • the base station does not send a physical downlink control channel to the user on the physical hybrid retransmission request check indication channel resource to which the user belongs; the user does not listen to or receive the physical downlink control channel on the physical hybrid retransmission request check indication channel resource.
  • Embodiment 9 This embodiment provides a PHICH sending method. The method is as follows: The base station notifies a user of user-specific PHICH resource determination and PHICH scrambling code through user-specific radio resource control (RRC) signaling. Cell identification.
  • RRC radio resource control
  • the base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user.
  • the base station determines the PHICH channel scrambling code of the user by using the user-specific cell identifier.
  • the base station transmits the PHICH channel scrambled in the above manner on the PHICH frequency domain resource determined above.
  • the user receives the PHICH according to the user-specific cell identifier and descrambles the PHICH.
  • the base station does not send the physical downlink control channel on the physical hybrid retransmission request check indication channel; the user does not listen or receive the physical downlink control channel on the physical hybrid retransmission request check indication channel resource.
  • Embodiment 10 This embodiment provides a PHICH sending method.
  • the method is as follows: The base station determines a PHICH resource and a scrambling code according to a user-specific cell identifier used for downlink demodulation reference signals.
  • the base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user.
  • the base station determines the PHICH channel scrambling code of the user by using the user-specific cell identifier.
  • the base station transmits the PHICH channel scrambled in the above manner on the PHICH frequency domain resource determined above.
  • the user receives the PHICH according to the user-specific cell identifier and descrambles the PHICH.
  • Embodiment 11 This embodiment provides a PHICH sending method.
  • the method is as follows: The base station determines a PHICH resource and a scrambling code according to a user-specific cell identifier used for downlink demodulation reference signals.
  • the base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user.
  • the base station determines the PHICH channel scrambling code of the user by using the user-specific cell identifier.
  • the base station transmits the PHICH channel scrambled in the above manner on the PHICH frequency domain resource determined above.
  • the user receives the PHICH according to the user-specific cell identifier and descrambles the PHICH.
  • Embodiment 12 This embodiment provides a PHICH sending method. The method is as follows: The base station determines a PHICH resource and a scrambling code according to a user-specific cell identifier used for downlink demodulation reference signals. The base station determines the PHICH frequency domain resource of the user by using the specific cell identifier of the user. The base station determines the PHICH channel scrambling code of the user by using the user-specific cell identifier.
  • FIG. 10 is a schematic diagram of PHICH interference in a Soft Cell scenario according to Embodiment 13 of the present invention. As shown in FIG. 10, it is assumed that a user-specific cell identifier assigned by the base station to User 1 is W ⁇ M, and is allocated to User 2. The user-specific cell identifier is first. The base station determines the PHICH frequency domain resource of the user 1 according to the cell identifier of the user 1 as follows:
  • the base station determines the PHICH frequency domain of the user 2 according to the cell identifier of the user 2 as follows. 0 i
  • the base station determines the PHICH frequency domain resource of user 2 in the following manner -
  • the cell identifier of user 1 is represented, indicating the cell identity of user 2
  • n is the total number of resource element groups (REGs) remaining outside the physical control format indication channel (PCFICH) in the second symbol
  • m ' is the sequence number of the PHICH group.
  • the base station sends the PHICH to the user 1 on the physical hybrid retransmission request check indication channel resource determined by the user 1 above; the base station does not send the PDCCH of the user 1 to the user 1 on the resource; the user 1 is not on the resource. Listen or receive PDCCH.
  • the base station sends the PHICH to the user 2 on the physical hybrid retransmission request check indication channel resource determined by the user 2; the base station does not send the PDCCH of the user 2 to the user 2 on the resource; the user 2 does not listen or receive the PDCCH on the resource.
  • Embodiment 14 As shown in FIG. 10, it is assumed that the user-specific cell identifier assigned by the base station to the user 1 is ⁇ , and the user-specific cell identifier assigned to the user 2 is first, and the base station determines according to the cell identifier of the user 1 as follows.
  • PHICH frequency domain Specifically, in a Multicast Broadcast Single Frequency Network (MBSFN) subframe or in subframes 1 and 6 of a Time Division Duplex (TDD) system and a physical hybrid retransmission request check indication channel (PHICH) is an extended form, the base station determines the PHICH frequency domain resource of user 1 in the following manner - 0
  • the base station determines the PHICH frequency domain of the user 2 according to the cell identifier of the user 2 as follows.
  • the base station determines the PHICH frequency domain resource of user 2 in the following manner - 0
  • the cell identifier of the user 1 indicates the cell identifier of the user 2, and ⁇ ' is the total number of resource element groups (REGs) remaining outside the physical control format indication channel (PCFICH) in the first symbol, and is the sequence number of the PHICH group.
  • the base station sends the PHICH to the user 1 on the physical hybrid retransmission request check indication channel resource determined by the user 1 above; the base station does not send any PDCCH on the resource.
  • the base station transmits the PHICH to the user 2 on the physical hybrid retransmission request check indication channel resource determined for the user 2 above; the base station does not transmit any PDCCH on the resource.
  • Embodiment 15 As shown in FIG. 10, it is assumed that the user-specific cell identifier assigned by the base station to the user 1 is that the user-specific cell identifier assigned to the user 2 is first, and the base station determines the user 1 according to the cell identifier of the user 1 as follows. PHICH frequency domain
  • the base station determines the PHICH frequency domain of User 1 in the following manner.
  • the base station determines the PHICH frequency domain of the user 2 according to the cell identifier of the user 2 as follows.
  • the base station determines the PHICH frequency domain resource of the user 2 in the following manner - 0
  • ⁇ 2 is the cell identity of User 2
  • ⁇ ' is the total number of Resource Element Groups (REGs) remaining outside the Physical Control Format Indicator Channel (PCFICH) in the first symbol, which is the PHICH group. Serial number.
  • REGs Resource Element Groups
  • the base station sends the PHICH to the user 1 according to the PHICH scrambling code of the user 1 on the physical hybrid retransmission request check indication channel resource determined by the user 1 above; the base station does not send the PDCCH of the user 1 to the user 1 on the resource.
  • User 1 descrambles PHICH of User 1 according to the cell identity of User 1; User 1 does not listen or receive PDCCH on the resource.
  • the base station sends the PHICH to the user 2 according to the PHICH scrambling code of the user 2 on the physical hybrid retransmission request check indication channel resource determined by the user 2; the base station does not send the PDCCH of the user 2 to the user 2 on the resource; the user 2 follows the user.
  • the cell identity of 2 descrambles the PHICH of user 2; user 2 does not listen or receive the PDCCH on the resource.
  • Embodiment 16 As shown in FIG. 10, it is assumed that the user-specific cell identifier assigned by the base station to the user 1 is that the user-specific cell identifier assigned to the user 2 is the second, and the base station determines the user 1 according to the cell identifier of the user 1 as follows. PHICH frequency domain
  • the base station determines the PHICH frequency domain resource of user 1 in the following manner -
  • the base station determines the PHICH frequency domain of the user 2 according to the cell identifier of the user 2 as follows. Specifically, in a Multicast Broadcast Single Frequency Network (MBSFN) subframe or in subframes 1 and 6 of a Time Division Duplex (TDD) system and a physical hybrid retransmission request check indication channel (PHICH) is an extended form, the base station determines the PHICH frequency domain resource of user 2 in the following manner -
  • MMSFN Multicast Broadcast Single Frequency Network
  • TDD Time Division Duplex
  • PHICH physical hybrid retransmission request check indication channel
  • the cell identifier of user 1 is represented, indicating the cell identity of user 2
  • ⁇ ' is the total number of resource element groups (REGs) remaining outside the physical control format indication channel (PCFICH) in the first symbol
  • m ' is the sequence number of the PHICH group.
  • the base station determines according to the cell identity of the user 2 User 2's PHICH scrambling code:
  • the base station sends the user the PHICH scrambling code to the user on the physical hybrid retransmission request check indication channel resource determined by the user 1 above.
  • the embodiment of the present invention relates to a method for transmitting a physical hybrid retransmission request check indication channel in a Long Term Evolution Advanced System (LTE-Advanced), which uses a base station according to a user-specific manner.
  • LTE-Advanced Long Term Evolution Advanced System
  • Determining the PHICH resource and/or scrambling the PHICH solves the problem that the single cell accommodates a user in the related art is far larger than the traditional cell, resulting in insufficient PHICH capacity, PHICH collision and interference, and improves the physical mixing weight in the downlink resource.
  • the request verification verifies the capacity of the channel, which reduces the interference caused by the PHICH collision.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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Abstract

本发明公开了一种物理混合重传请求校验指示信道(PHICH)的发送方法、装置及系统,其中,该方法包括:基站按照用户特定的方式确定PHICH资源和/或使用当前的PHICH的扰码对PHICH进行加扰;基站在确定的PHICH资源上发送加扰后的PHICH。通过本发明,解决了相关技术中单小区所容纳的用户远大于传统小区而导致PHICH容量不足、PHICH碰撞和干扰的问题,提高了下行资源中物理混合重传请求校验指示信道的容量,降低了PHICH碰撞所造成的干扰。

Description

物理混合重传请求校验指示信道的发送方法、 装置及系统 技术领域 本发明涉及通信领域, 具体而言, 涉及一种物理混合重传请求校验指示信道 (Physical Hybrid ARQ Indicator Channel, 简称为 PHICH) 的发送方法、 装置及系统。 背景技术 在第三代合作伙伴计划 (3th Generation Partner Project, 简称为 3GPP) 的演进全 球地面无线接入(Evolved Universal Terrestrial Radio Access, 简称为 E-UTRA)系统中, 数据的发送 /接收支持混合自动重传请求 (Hybrid Automatic Repeat Request, 简称为 HARQ) 技术, 以降低数据传输时延和获取更高的数据传输速率。 在 HARQ技术中, 数据接收方需要 向 数据发送方反馈确认 /否认 ( Acknowledgement /Non-Acknowledgement, 简称为 ACK/NACK)信息, 以帮助数据发送方确认数据接收 方正确接收。 在 3GPP E-UTRA系统的下行链路方向, 基站 (例如, eNodeB) 通过下行物理混 合重传请求校验指示信道(Physical HybridARQ Indicator Channel, 简称为 PHICH) 向 用户设备 (User Equipment, 简称为 UE) 反馈上行数据接收的 ACK/NACK信息, 即 基站(例如, eNodeB)对其是否正确接收来自 UE的数据传输块向 UE发送 ACK/NACK 信息。
LTE物理层 PHICH信道的传输以 PHICH组的形式来组织, 1个 PHICH组内的多 个 PHICH信道占用相同的时频域物理资源,采用正交扩频序列的复用方式。在普通循 环前缀(Normal Cyclic Prefix, 简称为 Normal CP) 的情况下, 采用扩频因子为 4结合 I/Q两路 BPSK调制的复用方式, 1个 PHICH组包括 12个调制符号, 占用 3个资源单 元组(Resource Element Group, 简称为 REG), 复用 8个 PHICH信道。 在扩展循环前 缀 (Extended Cyclic Prefix, 简称为 Extended CP) 时, 针对频率选择性较强的无线信 道, 采用扩频因子为 2集合 I/Q两路 BPSK调制的复用方式, 1个 PHICH组包括 6个 调制复用, 复用 4个 PHICH信道, 此时, 2个 PHICH组共同占用 3个 REG的物理资 源。
1个 PHICH信道由 PHICH组的 ID ( ) 和组内 ID ( "™CH ) 共同确定。 PHICH信道的索引号 U CH 与上行数据传输的资源位置相对应, 具体来 说, 由相应的物理上行共享信道(Physical Uplink Shared Channel, 简称为 PUSCH)数 据的第 1个 PRB的序号所确定。 相邻 PRB对应的 PHICH将映射到不同的 PHICH组 中, 映射的数学关系是-
" yjPgHroIuCpH _ ~ (1 JP loRwBes_tR—A index . DMRS ) \ γ IπLIίUλΛU 1 A Vf PgHr0IUCpH - - 1 Τ PHICH I ] [ P^H0I1CίΡH ^
w PseHqICH―
Figure imgf000004_0001
表示 ±行数据解调导频 ¾ί盾环移位指示 引, /^^^Γ^表示 ±行 源 分配的最小物理资源块索引, N ai表示扩频因子大小, 表示 PHICH组数量。 图 1是根据相关技术的 PHICH信道的基带处理过程的示意图, 如图 1所示, 1个 比特的 ACK/NACK ( 0/1 ) 信息使用重复编码的方式得到 3个比特的编码后信息, 然 后经过 BPSK调制以及系数为 4的扩频操作(《 eH ),得到 12个符号,映射在 PHICH 组对应的 3个 REG的资源位置上 ( )。 图 2是根据相关技术的 PHICH信道的时频域映射的示意图, 如图 2所示,在频域 上, 1个 PHICH组对应的 3个 REG采用分布式的映射方式, 以获得分集增益; 而在 时间上, PHICH有常规和扩展两种资源映射方式。在常规方式时, PHICH映射在子帧 的第一个正交频分复用 (Orthogonal Frequency Division Multiplexing, OFDM) 符号上; 而当物理下行控制信道 (Physical Downlink Control Channel, 简称为 PDCCH) 的长度 为 3时(在混合载波的 MBSFN子帧或者时分双工(Time Division Duplex, TDD)特殊 子帧中, PDCCH长度为 2时), PHICH可以配置为扩展的方式, 此时 PHICH将分布 在 PDCCH所占用的多个 OFDM符号上。 图 3是根据相关技术的 PHICH信道的不同小区频域初始偏移位置关系的示意图, 如图 3所示, 相邻小区 (不同 Cell ID) 的 PHICH资源频域位置相互错开。 在 LTE-A 研究阶段中, 引入了很多新技术, 例如, 多点协作 (Coordinated Multi-Point,简称为 CoMP)、载波聚合(Carrier Aggregation,简称为 CA)、软小区(Soft Cell) 等。 在相关技术中, 针对这些新技术提出了很多新的通信场景, 其中, CoMP 场景 4和 Soft Cell等场景中单小区所容纳的用户都远远大于传统小区, 这样, 容易导 致 PHICH出现容量不足的问题, 并且, 还会造成 PHICH碰撞和干扰的问题。 针对相关技术中单小区所容纳的用户远大于传统小区而导致 PHICH 容量不足、 PHICH碰撞和干扰的问题, 目前尚未提出有效的解决方案。 发明内容 本发明实施例提供了一种物理混合重传请求校验指示信道的发送方案, 以至少解 决上述相关技术中单小区所容纳的用户远大于传统小区而导致 PHICH 容量不足、 PHICH碰撞和干扰的问题。 根据本发明实施例的一个方面, 提供了一种 PHICH的发送方法, 包括: 基站按照 用户特定的方式确定 PHICH资源和 /或使用当前的 PHICH的扰码对 PHICH进行加扰; 基站在确定的 PHICH资源上发送加扰后的 PHICH。 优选地,基站按照用户特定的方式确定 PHICH资源包括: 基站按照用户特定的小 区标识确定 PHICH的频域资源。 优选地, 基站按照用户特定的方式使用当前的 PHICH的扰码对 PHICH进行加扰 包括: 基站按照用户特定的小区标识使用当前的 PHICH的扰码对 PHICH进行加扰。 优选地, 基站按照用户特定的方式确定 PHICH资源和 /或使用当前的 PHICH的扰 码对 PHICH进行加扰之前, 该方法还包括: 基站通过用户特定的无线资源控制 RRC 信令将用户特定的小区标识通知给用户终端。 优选地, 上述用户特定的小区标识为用于确定物理下行解调参考信号的用户特定 的小区标识。 优选地,在 PHICH为扩展形式情况下,基站按照下述方式确定多播单频网子帧或 时分双工系统子帧 1和 6中的 PHICH的频域资源:
([KC"D ' ni; +
Figure imgf000005_0001
N "表示用户特定的小区标识, ¾为第 '个符号中物理控制格式指示信道
PCFICH之外剩余的资源单元组 REG总数, m'为 PHICH组的序号, 为 // =1时的? ¾。 优选地, 在 PHICH为非扩展形式情况下, 基站按照下述方式确定除多播单频网子帧和时分双工系统中子帧 1 和 6 之外的 PHICH的频域资源: 0
1
Figure imgf000006_0001
2 其中, N 表示用户特定的小区标识, ¾为第 '个符号中物理控制格式指示信道
PCFICH之外剩余的资源单元组 REG总数, m'为 PHICH组的序号, 为 // =0时的^,。 优选地, 基站按照下述方式确定 PHICH的扰码: cimt = (L"s/2」 + l) - (2N + l) - 29 + N 其中, cmit为该扰码序列生成器的初始化值, Nv 表示用户特定的小区标识, ns为 时隙索引。 优选地,基站在确定的 PHICH资源上发送加扰后的 PHICH之后, 该方法还包括: 用户终端根据自身所属的用户特定的小区标识对接收到得加扰后的 PHICH 进行解扰 码。 优选地,基站没有在用户所属 PHICH资源上向该用户发送物理下行控制信道,基 站在确定的 PHICH资源上发送加扰后的 PHICH之后, 该方法还包括: 接收到加扰后 的 PHICH的用户终端不在自身所属的 PHICH资源上监听或接收物理下行控制信道。 优选地,基站没有在 PHICH资源上发送物理下行控制信道,基站在确定的 PHICH 资源上发送加扰后的 PHICH之后, 该方法还包括: 接收到加扰后的 PHICH的用户终 端不在 PHICH资源上监听或接收物理下行控制信道。 根据本发明实施例的另一方面, 提供了一种 PHICH的发送装置, 位于基站侧, 该 发送装置包括: 预处理模块, 设置为按照用户特定的方式确定 PHICH资源和 /或使用 当前的 PHICH的扰码对 PHICH进行加扰; 发送模块, 设置为在确定的 PHICH资源上 发送加扰后的 PHICH。 优选地, 预处理模块还设置为按照用户特定的小区标识确定 PHICH的频域资源。 优选地,预处理模块还设置为按照用户特定的小区标识使用当前的 PHICH的扰码 对 PHICH进行加扰。 优选地, 该装置还包括: 通知模块, 设置为通过用户特定的无线资源控制 RRC信 令将用户特定的小区标识通知给用户终端。 优选地, 上述用户特定的小区标识为用于确定物理下行解调参考信号的用户特定 的小区标识。 优选地,预处理模块还设置为在 PHICH为扩展形式情况下, 按照下述方式确定多 播单频网子帧或时分双工系统子帧 1和 6中的 PHICH的频域资源:
Figure imgf000007_0001
其中, N 表示用户特定的小区标识, ¾为第 '个符号中物理控制格式指示信道 PCFICH之外剩余的资源单元组 REG总数, m'为 PHICH组的序号, 为 // =1时的^,。 优选地,预处理模块还设置为在 PHICH为非扩展形式情况下, 按照下述方式确定 除多播单频网子帧和时分双工系统中子帧 1和 6之外的 PHICH的频域资源:
Figure imgf000007_0002
其中, N 表示用户特定的小区标识, ¾为第 '个符号中物理控制格式指示信道 PCFICH之外剩余的资源单元组 REG总数, m'为 PHICH组的序号, n0为 // =0时的^,。 优选地, 预处理模块还设置为按照下述方式确定 PHICH的扰码:
+ 1 ' 2N + 1 ' 2y + Nc: 其中, cmit为该扰码序列生成器的初始化值, N 表示用户特定的小区标识, 为 时隙索引。 根据本发明实施例的又一方面, 提供了一种用户终端, 包括: 接收模块, 设置为 接收来自基站的加扰后的 PHICH, 其中, 加扰后的 PHICH是基站在按照用户特定的 方式确定的 PHICH资源上发送的, 和 /或加扰后的 PHICH为基站按照用户特定的方式 使用当前的 PHICH的扰码对 PHICH进行加扰后获得的。 优选地, 该用户终端还包括: 解扰码模块, 设置为根据自身所属的用户特定的小 区标识对接收到得加扰后的 PHICH进行解扰码。 优选地,接收模块还设置为在基站没有在用户所属 PHICH资源上向该用户发送物 理下行控制信道, 而在确定的 PHICH资源上发送加扰后的 PHICH的情况下, 不在用 户终端所属的 PHICH资源上监听或接收物理下行控制信道。 优选地, 接收模块还设置为在基站没有在 PHICH资源上发送物理下行控制信道, 而在确定的 PHICH资源上发送加扰后的 PHICH的情况下,不在 PHICH资源上监听或 接收物理下行控制信道。 根据本发明实施例的再一方面, 提供了一种 PHICH 的发送系统, 包括: 上述的 PHICH的发送装置和上述的用户终端。 通过本发明实施例, 采用基站按照用户特定的方式确定 PHICH 资源和 /或对 PHICH进行加扰的方式, 解决了相关技术中单小区所容纳的用户远大于传统小区而导 致 PHICH容量不足、 PHICH碰撞和干扰的问题, 提高了下行资源中物理混合重传请 求校验指示信道的容量, 降低了 PHICH碰撞所造成的干扰。 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是根据相关技术的 PHICH信道的基带处理过程的示意图; 图 2是根据相关技术的 PHICH信道的时频域映射的示意图; 图 3是根据相关技术的 PHICH信道的不同小区频域初始偏移位置关系的示意图; 图 4 是根据本发明实施例的物理混合重传请求校验指示信道的发送方法的流程 图; 图 5是根据本发明实施例的物理混合重传请求校验指示信道的发送装置的结构框 图; 图 6是根据本发明优选实施例的物理混合重传请求校验指示信道的发送装置的结 构框图; 图 7是根据本发明实施例的用户终端的结构框图; 图 8是根据本发明优选实施例的用户终端的结构框图; 图 9是根据本发明实施例的物理混合重传请求校验指示信道的发送系统的结构框 图; 图 10是根据本发明实施例 13的 Soft Cell场景中 PHICH干扰的示意图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 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。 根据本发明实施例,提供了一种 PHICH的发送方法。 图 4是根据本发明实施例的 物理混合重传请求校验指示信道的发送方法的流程图, 如图 4所示, 该方法包括如下 步骤: 步骤 S402, 基站按照用户特定的方式确定 PHICH资源和 /或使用当前的 PHICH 的扰码对 PHICH进行加扰; 步骤 S404, 基站在确定的 PHICH资源上发送加扰后的 PHICH。 通过上述步骤, 采用基站按照用户特定的方式确定 PHICH资源和 /或对 PHICH进 行加扰的方式, 解决了相关技术中单小区所容纳的用户远大于传统小区而导致 PHICH 容量不足、 PHICH碰撞和干扰的问题, 提高了下行资源中物理混合重传请求校验指示 信道的容量, 降低了 PHICH碰撞所造成的干扰。 在实施过程中, 步骤 S402可以有如下几种方式: 方式一、 基站按照用户特定的方式确定 PHICH资源; 方式二、基站按照用户特定的方式使用当前的 PHICH的扰码对 PHICH进行加扰; 方式三、基站按照用户特定的方式确定 PHICH资源, 并按照用户特定的方式使用 当前的 PHICH的扰码对 PHICH进行加扰。 这里当基站采用方式二和三得到加扰后的 PHICH时,用户侧需要采用用户特定方 式进行解扰码。 需要说明的是,在实施过程中,基站确定 PHICH资源所采用的用户特定方式与加 扰 /解扰时所采用的用户特定方式可以为相同的用户特定方式, 也可以采用两种不同的 用户特定方式。 在步骤 S402 之前, 基站还可以通过用户特定的无线资源控制 (Radio Resource Control, 简称为 RRC )信令将用户特定的小区标识通知给用户终端。 这里, 可以将每 个用户终端看作一个用户, 这样可以提高用户侧接收来自基站消息的准确性。 在步骤 S402中, 基站按照用户特定的方式确定 PHICH资源可以包括: 基站按照 用户特定的小区标识确定 PHICH 的频域资源。 基站按照用户特定的方式使用当前的 PHICH的扰码对 PHICH进行加扰可以包括: 基站按照用户特定的小区标识使用当前 的 PHICH的扰码对 PHICH进行加扰。在步骤 S404之后,用户终端可以根据自身所属 的用户特定的小区标识对接收到得加扰后的 PHICH进行解扰码。其中,用户特定的小 区标识可以为用于确定物理下行解调参考信号的用户特定的小区标识。 这样, 基站可 以按照用户特定的小区标识来确定 PHICH资源和进行加扰, 提高了系统的处理能力。 优选地, 在多播 /组播单频网 (MBSFN) 子帧中、 或时分双工系统子帧 1和 6中, 且物理混合重传请求校验指示信道为扩展形式的情况下,步骤 S402中,基站可以按照 下述方式确定的物理混合重传请求校验指示信道的频域资源:
Figure imgf000010_0001
其中, Nv 表示用户特定的小区标识, ¾为第 '个符号中物理控制格式指示信道
(PCFICH) 之外剩余的资源单元组 (REG) 总数, 为 PHICH组的序号, 为// =1 时的? ¾。 优选地,在除上述 MBSFN子帧和时分双工系统中子帧 1和 6之外的其他情况下, 步骤 S402中,基站可以按照下述方式确定非扩展物理混合重传请求校验指示信道的频 域资源:
Figure imgf000011_0001
其中, N 表示用户特定的小区标识, ¾为第 '个符号中物理控制格式指示信道 (PCFICH) 之外剩余的资源单元组 (REG) 总数, 为 PHICH组的序号, "。为 // =0 时的? ¾。 优选地,步骤 S402中,基站可以按照下述方式确定物理混合重传请求校验指示信 道的扰码:
Cinit一 + 1 · 2N1 +1 - 2 + N? 其中, Cmlt为扰码序列生成器的初始化值, NV 表示用户特定的小区标识, 《s为时 隙索引。 在实施过程中,如果基站没有在用户所属 PHICH资源上向该用户发送物理下行控 制信道, 则在步骤 S404之后, 接收到加扰后的 PHICH的用户终端将不在自身所属的 PHICH资源上监听或接收物理下行控制信道。 如果基站没有在 PHICH资源上发送物 理下行控制信道, 则在步骤 S404 之后, 接收到加扰后的 PHICH 的用户终端将不在 PHICH资源上监听或接收物理下行控制信道。 对应于上述方法,本发明实施例还提供了一种 PHICH的发送装置。 图 5是根据本 发明实施例的物理混合重传请求校验指示信道的发送装置的结构框图, 如图 5所示, 该装置 50位于基站侧,包括:预处理模块 52,设置为按照用户特定的方式确定 PHICH 资源和 /或使用当前的 PHICH的扰码对 PHICH进行加扰; 发送模块 54,耦合至预处理 模块 52, 设置为在确定的 PHICH资源上发送加扰后的 PHICH。 通过上述装置 50, 预处理模块 52按照用户特定的方式确定 PHICH资源和 /或对 PHICH进行加扰,发送模块 54在确定的 PHICH资源上发送加扰后的 PHICH,解决了 相关技术中单小区所容纳的用户远大于传统小区而导致 PHICH容量不足、 PHICH碰 撞和干扰的问题, 提高了下行资源中物理混合重传请求校验指示信道的容量, 降低了 PHICH碰撞所造成的干扰。 优选地, 预处理模块 52还设置为按照用户特定的小区标识确定 PHICH的频域资 源和 /或使用当前的 PHICH的扰码对 PHICH进行加扰。 图 6是根据本发明优选实施例的物理混合重传请求校验指示信道的发送装置的结 构框图, 如图 6所示, 该装置 50还包括: 通知模块 62, 耦合至预处理模块 52, 设置 为通过用户特定的无线资源控制 RRC信令将用户特定的小区标识通知给用户终端。 优选地, 上述用户特定的小区标识为用于确定物理下行解调参考信号的用户特定 的小区标识。 优选地, 预处理模块 52还设置为在 PHICH为扩展形式情况下, 按照下述方式确 定多播单频网子帧或时分双工系统子帧 1和 6中的 PHICH的频域资源:
Figure imgf000012_0001
其中, N 表示用户特定的小区标识, ¾为第 '个符号中物理控制格式指示信道 PCFICH之外剩余的资源单元组 REG总数, m'为 PHICH组的序号, 为 // =1时的^,。 优选地, 预处理模块 52还设置为在 PHICH为非扩展形式情况下, 按照下述方式 确定除多播单频网子帧和时分双工系统中子帧 1和 6之外的 PHICH的频域资源: 0
1
Figure imgf000012_0002
2 其中, N 表示用户特定的小区标识, ¾为第 '个符号中物理控制格式指示信道 PCFICH之外剩余的资源单元组 REG总数, m'为 PHICH组的序号, n0为 // =0时的^,。 优选地, 预处理模块 52还设置为按照下述方式确定 PHICH的扰码: 一 + 1 · 2N1 + 1 - 2 + N: 其中, cmit为该扰码序列生成器的初始化值, N 表示用户特定的小区标识, ns为 时隙索引。 本发明实施例还提供了一种用户终端。 图 7是根据本发明实施例的用户终端的结 构框图, 如图 7所示, 该用户终端 70包括: 接收模块 72, 耦合至发送模块 54, 设置 为接收来自基站的加扰后的 PHICH, 其中, 加扰后的 PHICH是基站在按照用户特定 的方式确定的 PHICH资源上发送的, 和 /或加扰后的 PHICH为基站按照用户特定的方 式使用当前的 PHICH的扰码对 PHICH进行加扰后获得的。 图 8是根据本发明优选实施例的用户终端的结构框图, 如图 8所示, 该用户终端 70还包括: 解扰码模块 82, 耦合至接收模块 72, 设置为根据自身所属的用户特定的 小区标识对接收到得加扰后的 PHICH进行解扰码。 优选地, 接收模块 72还设置为在基站没有在用户所属 PHICH资源上向该用户发 送物理下行控制信道, 而在确定的 PHICH资源上发送加扰后的 PHICH的情况下, 不 在用户终端所属的 PHICH资源上监听或接收物理下行控制信道。 优选地, 接收模块 72还设置为在基站没有在 PHICH资源上发送物理下行控制信 道, 而在确定的 PHICH资源上发送加扰后的 PHICH的情况下, 不在 PHICH资源上监 听或接收物理下行控制信道。 本发明实施例还提供了一种 PHICH的发送系统。图 9是根据本发明实施例的物理 混合重传请求校验指示信道的发送系统的结构框图, 如图 9所示, 该系统包括: 上述 PHICH的发送装置 50和上述用户终端 70。 下面结合优选实施例和附图对上述实施例的实现过程进行详细说明。 实施例 1 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站通过用户特定的无线资源控制(RRC)信令向用户通知用于 PHICH资源确定 的用户特定的小区标识。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站在上述确定的 PHICH频域资源上发送 PHICH。 用户按照该用户特定的小区标识接收 PHICH。 实施例 2 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站通过用户特定的无线资源控制(RRC)信令向用户通知用于 PHICH资源确定 的用户特定的小区标识。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站在上述确定的 PHICH频域资源上发送 PHICH。 用户按照该用户特定的小区标识接收 PHICH。 其中, 基站不在用户所属物理混合重传请求校验指示信道资源上向该用户发送物 理下行控制信道; 用户不在所属物理混合重传请求校验指示信道资源上监听或接收物 理下行控制信道。 实施例 3 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站通过用户特定的无线资源控制(RRC)信令向用户通知用于 PHICH资源确定 的用户特定的小区标识。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站在上述确定的 PHICH频域资源上发送 PHICH。 用户按照该用户特定的小区标识接收 PHICH。 其中, 基站不在所述物理混合重传请求校验指示信道上发送物理下行控制信道; 用户不在所述物理混合重传请求校验指示信道资源上监听或接收物理下行控制信道。 实施例 4 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站按照用于下行解调参考信号的用户特定的小区标识确定 PHICH资源。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站在上述确定的 PHICH频域资源上发送 PHICH。 用户按照该用户特定的小区标识接收 PHICH。 实施例 5 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站按照用于下行解调参考信号的用户特定的小区标识确定 PHICH资源。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站在上述确定的 PHICH频域资源上发送 PHICH。 用户按照该用户特定的小区标识接收 PHICH。 其中, 基站不在用户所属物理混合重传请求校验指示信道资源上向该用户发送物 理下行控制信道; 用户不在所属物理混合重传请求校验指示信道资源上监听或接收物 理下行控制信道。 实施例 6 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站按照用于下行解调参考信号的用户特定的小区标识确定 PHICH资源。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站在上述确定的 PHICH频域资源上发送 PHICH。 用户按照该用户特定的小区标识接收 PHICH。 其中, 基站不在所述物理混合重传请求校验指示信道上发送物理下行控制信道; 用户不在所述物理混合重传请求校验指示信道资源上监听或接收物理下行控制信道。 实施例 7 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站通过用户特定的无线资源控制(RRC)信令向用户通知用于 PHICH资源确定 和 PHICH扰码的用户特定的小区标识。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站通过该用户特定的小区标识确定该用户的 PHICH信道扰码。 基站在上述确定的 PHICH频域资源上发送按照上述方式加扰后的 PHICH信道。 用户按照该用户特定的小区标识接收 PHICH和对 PHICH进行解扰码。 实施例 8 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站通过用户特定的无线资源控制(RRC)信令向用户通知用于 PHICH资源确定 和 PHICH扰码的用户特定的小区标识。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站通过该用户特定的小区标识确定该用户的 PHICH信道扰码。 基站在上述确定的 PHICH频域资源上发送按照上述方式加扰后的 PHICH信道。 用户按照该用户特定的小区标识接收 PHICH和对 PHICH进行解扰码。 其中, 基站不在用户所属物理混合重传请求校验指示信道资源上向该用户发送物 理下行控制信道; 用户不在所属物理混合重传请求校验指示信道资源上监听或接收物 理下行控制信道。 实施例 9 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站通过用户特定的无线资源控制(RRC)信令向用户通知用于 PHICH资源确定 和 PHICH扰码的用户特定的小区标识。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站通过该用户特定的小区标识确定该用户的 PHICH信道扰码。 基站在上述确定的 PHICH频域资源上发送按照上述方式加扰后的 PHICH信道。 用户按照该用户特定的小区标识接收 PHICH和对 PHICH进行解扰码。 其中, 基站不在所述物理混合重传请求校验指示信道上发送物理下行控制信道; 用户不在所述物理混合重传请求校验指示信道资源上监听或接收物理下行控制信道。 实施例 10 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站按照用于下行解调参考信号的用户特定的小区标识确定 PHICH资源和扰码。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站通过该用户特定的小区标识确定该用户的 PHICH信道扰码。 基站在上述确定的 PHICH频域资源上发送按照上述方式加扰后的 PHICH信道。 用户按照该用户特定的小区标识接收 PHICH和对 PHICH进行解扰码。 实施例 11 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站按照用于下行解调参考信号的用户特定的小区标识确定 PHICH资源和扰码。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站通过该用户特定的小区标识确定该用户的 PHICH信道扰码。 基站在上述确定的 PHICH频域资源上发送按照上述方式加扰后的 PHICH信道。 用户按照该用户特定的小区标识接收 PHICH和对 PHICH进行解扰码。 其中, 基站不在用户所属物理混合重传请求校验指示信道资源上向该用户发送物 理下行控制信道; 用户不在所属物理混合重传请求校验指示信道资源上监听或接收物 理下行控制信道。 实施例 12 本实施例提供了一种 PHICH的发送方法, 该方法的流程如下: 基站按照用于下行解调参考信号的用户特定的小区标识确定 PHICH资源和扰码。 基站通过该用户特定的小区标识确定该用户的 PHICH频域资源。 基站通过该用户特定的小区标识确定该用户的 PHICH信道扰码。 基站在上述确定的 PHICH频域资源上发送按照上述方式加扰后的 PHICH信道。 用户按照该用户特定的小区标识接收 PHICH和对 PHICH进行解扰码。 其中, 基站不在所述物理混合重传请求校验指示信道上发送物理下行控制信道; 用户不在所述物理混合重传请求校验指示信道资源上监听或接收物理下行控制信道。 实施例 13 图 10是根据本发明实施例 13的 Soft Cell场景中 PHICH干扰的示意图, 如图 10 所示, 假设基站分配给用户 1的用户特定的小区标识为 W^M, 分配给用户 2的用户特 定的小区标识为 首先,基站根据上述用户 1的小区标识按照如下方式确定用户 1的 PHICH频域资 源:
Figure imgf000018_0001
特殊地, 在多播 /组播单频网 (Multicast Broadcast Single Frequency Network, MBSFN)子帧中或在时分双工(TDD )系统的子帧 1和 6中且物理混合重传请求校验 指示信道(PHICH)为扩展形式情况下, 基站按照下述方式确定用户 1的 PHICH频域 资源- . ?¾ /?¾ + mod η,, i = 0
Figure imgf000018_0002
其次,基站根据上述用户 2的小区标识按照如下方式确定用户 2的 PHICH频域资 0 i
2
Figure imgf000019_0001
特殊地, 在多播 /组播单频网 (Multicast Broadcast Single Frequency Network, MBSFN)子帧中或在时分双工(TDD)系统的子帧 1和 6中且物理混合重传请求校验 指示信道(PHICH)为扩展形式情况下, 基站按照下述方式确定用户 2的 PHICH频域 资源-
Figure imgf000019_0002
其中, 表示用户 1的小区标识, 表示用户 2的小区标识, n 为第 ^个符 号中物理控制格式指示信道 (PCFICH) 之外剩余的资源单元组 (REG) 总数, m '为 PHICH组的序号。 在实施过程中, 基站在上述为用户 1确定的物理混合重传请求校验指示信道资源 上向用户 1发送 PHICH; 基站不在该资源上向用户 1发送用户 1的 PDCCH; 用户 1 不在该资源上监听或接收 PDCCH。 基站在上述为用户 2确定的物理混合重传请求校验指示信道资源上向用户 2发送 PHICH;基站不在该资源上向用户 2发送用户 2的 PDCCH;用户 2不在该资源上监听 或接收 PDCCH。 实施例 14 如图 10所示, 假设基站分配给用户 1的用户特定的小区标识为 ^ ^, 分配给用 户 2的用户特定的小区标识为 首先,基站根据上述用户 1的小区标识按照如下方式确定用户 1的 PHICH频域资
Figure imgf000020_0001
特殊地, 在多播 /组播单频网 (Multicast Broadcast Single Frequency Network, MBSFN)子帧中或在时分双工(TDD)系统的子帧 1和 6中且物理混合重传请求校验 指示信道(PHICH)为扩展形式情况下, 基站按照下述方式确定用户 1的 PHICH频域 资源- 0
1
2
Figure imgf000020_0002
其次,基站根据上述用户 2的小区标识按照如下方式确定用户 2的 PHICH频域资
2
Figure imgf000020_0003
特殊地, 在多播 /组播单频网 (Multicast Broadcast Single Frequency Network, MBSFN)子帧中或在时分双工(TDD)系统的子帧 1和 6中且物理混合重传请求校验 指示信道(PHICH)为扩展形式情况下, 基站按照下述方式确定用户 2的 PHICH频域 资源- 0
1
Figure imgf000020_0004
2 其中, 表示用户 1的小区标识, 表示用户 2的小区标识, ^'为第 个符 号中物理控制格式指示信道 (PCFICH) 之外剩余的资源单元组 (REG) 总数, 为 PHICH组的序号。 在实施过程中, 基站在上述为用户 1确定的物理混合重传请求校验指示信道资源 上向用户 1发送 PHICH; 基站不在该资源上发送任何 PDCCH。 基站在上述为用户 2确定的物理混合重传请求校验指示信道资源上向用户 2发送 PHICH; 基站不在该资源上发送任何 PDCCH。 用户 1 和用户 2 都不在上述物理混合重传请求校验指示信道资源上监听或接收 PDCCH。 实施例 15 如图 10所示, 假设基站分配给用户 1的用户特定的小区标识为 , 分配给用 户 2的用户特定的小区标识为 首先,基站根据上述用户 1的小区标识按照如下方式确定用户 1的 PHICH频域资
0
1
2
Figure imgf000021_0001
特殊地, 在多播 /组播单频网 (Multicast Broadcast Single Frequency Network, MBSFN)子帧中或在时分双工(TDD)系统的子帧 1和 6中且物理混合重传请求校验 指示信道(PHICH)为扩展形式情况下, 基站按照下述方式确定用户 1的 PHICH频域
Figure imgf000021_0002
其次,基站根据上述用户 2的小区标识按照如下方式确定用户 2的 PHICH频域资
KCIDI . ",; +∞ ') m。d η,, i = 0
(Ld ;/"。」 + '+L¾/3」)mod?¾ 1
"D2. /"o」 +∞ '+〔2 ni; /3」) mod ni; i = 2 特殊地, 在多播 /组播单频网 (Multicast Broadcast Single Frequency Network, MBSFN)子帧中或在时分双工(TDD)系统的子帧 1和 6中且物理混合重传请求校验 指示信道(PHICH)为扩展形式情况下, 基站按照下述方式确定用户 2的 PHICH频域 资源- 0
1
Figure imgf000022_0001
2 其中, 表示用户 1的小区标识, ^2表示用户 2的小区标识, ^'为第 个符 号中物理控制格式指示信道 (PCFICH) 之外剩余的资源单元组 (REG) 总数, 为 PHICH组的序号。 步地, 基站根据用户 1的小区标识确定用户 1的 PHICH扰码: c t'= L"s/2」 + 1 ' 2d+l '2Y+N: 基站根据用户 2的小区标识确定用户 2的 PHICH扰码: cimt 2 = L"s/2」 + 1 ' 2+1 '29+N 其中, c 为用户 1的 PHICH扰码序列生成器的初始化值, c»« 为用户 2的 PHICH 扰码序列生成器的初始化值, N: 表示用户 1的小区标识, N: :表示用户 2的小区标 识, 为时隙索引 在实施过程中, 基站在上述为用户 1确定的物理混合重传请求校验指示信道资源 上按照用户 1的 PHICH扰码向用户 1发送 PHICH; 基站不在该资源上向用户 1发送 用户 1的 PDCCH; 用户 1按照用户 1的小区标识对用户 1的 PHICH进行解扰; 用户 1不在该资源上监听或接收 PDCCH。 基站在上述为用户 2确定的物理混合重传请求校验指示信道资源上按照用户 2的 PHICH扰码向用户 2发送 PHICH;基站不在该资源上向用户 2发送用户 2的 PDCCH; 用户 2按照用户 2的小区标识对用户 2的 PHICH进行解扰;用户 2不在该资源上监听 或接收 PDCCH。 实施例 16 如图 10所示, 假设基站分配给用户 1的用户特定的小区标识为 , 分配给用 户 2的用户特定的小区标识为 其次,基站根据上述用户 1的小区标识按照如下方式确定用户 1的 PHICH频域资
0
1
2
Figure imgf000023_0001
特殊地, 在多播 /组播单频网 (Multicast Broadcast Single Frequency Network, MBSFN)子帧中或在时分双工(TDD)系统的子帧 1和 6中且物理混合重传请求校验 指示信道(PHICH)为扩展形式情况下, 基站按照下述方式确定用户 1的 PHICH频域 资源-
Figure imgf000023_0002
其次,基站根据上述用户 2的小区标识按照如下方式确定用户 2的 PHICH频域资
Figure imgf000024_0001
特殊地, 在多播 /组播单频网 (Multicast Broadcast Single Frequency Network, MBSFN)子帧中或在时分双工(TDD)系统的子帧 1和 6中且物理混合重传请求校验 指示信道(PHICH)为扩展形式情况下, 基站按照下述方式确定用户 2的 PHICH频域 资源-
Figure imgf000024_0002
其中, 表示用户 1的小区标识, 表示用户 2的小区标识, ^'为第 个符 号中物理控制格式指示信道 (PCFICH) 之外剩余的资源单元组 (REG) 总数, m '为 PHICH组的序号。 进一步地, 基站根据用户 1的小区标识确定用户 1的 PHICH扰码: = (L"s /2」 + 1) ' (2N: + 1) · 29 + N: 基站根据用户 2的小区标识确定用户 2的 PHICH扰码:
( IN: + 1 . 2 + τ N ^ vcID2 其中, c 为用户 1的 PHICH扰码序列生成器的初始化值, c»« 为用户 2的 PHICH 扰码序列生成器的初始化值, '表示用户 1的小区标识, ^表示用户 2的小区标 识, 为时隙索引。 在实施过程中, 基站在上述为用户 1确定的物理混合重传请求校验指示信道资源 上按照用户 1 的 PHICH 扰码向用户 1 发送 PHICH; 基站不在该资源上发送任何 PDCCH 基站在上述为用户 2确定的物理混合重传请求校验指示信道资源上按照用户 2的 PHICH扰码向用户 2发送 PHICH; 基站不在该资源上发送任何 PDCCH。 用户 1 和用户 2 都不在上述物理混合重传请求校验指示信道资源上监听或接收 PDCCH。 综上所述, 本发明实施例涉及长期演进高级系统 (Long term evolution advanced system, 简称为 LTE-Advanced) 中一种物理混合重传请求校验指示信道的发送方法, 采用基站按照用户特定的方式确定 PHICH资源和 /或对 PHICH进行加扰的方式, 解决 了相关技术中单小区所容纳的用户远大于传统小区而导致 PHICH 容量不足、 PHICH 碰撞和干扰的问题, 提高了下行资源中物理混合重传请求校验指示信道的容量, 降低 了 PHICH碰撞所造成的干扰。 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

权 利 要 求 书
1. 一种物理混合重传请求校验指示信道 PHICH的发送方法, 包括:
基站按照用户特定的方式确定 PHICH资源和 /或使用当前的 PHICH的扰码 对 PHICH进行加扰;
所述基站在确定的所述 PHICH资源上发送加扰后的 PHICH。
2. 根据权利要求 1所述的方法, 其中, 所述基站按照用户特定的方式确定 PHICH 资源包括:
所述基站按照用户特定的小区标识确定 PHICH的频域资源。
3. 根据权利要求 1所述的方法, 其中, 所述基站按照用户特定的方式使用当前的 PHICH的扰码对 PHICH进行加扰包括:
所述基站按照用户特定的小区标识使用当前的 PHICH的扰码对 PHICH进 行加扰。
4. 根据权利要求 2 或 3 所述的方法, 其中, 所述基站按照用户特定的方式确定 PHICH资源和 /或使用当前的 PHICH的扰码对 PHICH进行加扰之前, 还包括: 所述基站通过用户特定的无线资源控制 RRC 信令将所述用户特定的小区 标识通知给用户终端。
5. 根据权利要求 2或 3所述的方法, 其中, 所述用户特定的小区标识为用于确定 物理下行解调参考信号的用户特定的小区标识。
6. 根据权利要求 2所述的方法, 其中, 在 PHICH为扩展形式情况下,
所述基站按照下述方式确定多播单频网子帧或时分双工系统子帧 1和 6中 的 PHICH的频域资源:
Figure imgf000026_0001
其中, N 表示所述用户特定的小区标识, 为第 //个符号中物理控制格 式指示信道 PCFICH之外剩余的资源单元组 REG总数, 为 PHICH组的序号, "!为/; =1时的 。
7. 根据权利要求 2所述的方法, 其中, 在 PHICH为非扩展形式情况下,
所述基站按照下述方式确定除多播单频网子帧和时分双工系统中子帧 1和 6之外的 PHICH的频域资源: 0
1
2
Figure imgf000027_0001
其中, N 表示所述用户特定的小区标识, 为第 //个符号中物理控制格 式指示信道 PCFICH之外剩余的资源单元组 REG总数, '为 PHICH组的序号, "。为 /; =0时的? ¾。 根据权利要求 3所述的方法, 其中,
所述基站按照下述方式确定所述 PHICH的扰码: 一 + l) - (2N:e'' + l) - 29 + N :" 其中, Clmt为该扰码序列生成器的初始化值, N 表示所述用户特定的小区 标识, 《s为时隙索引。 根据权利要求 3所述的方法,其中,所述基站在确定的所述 PHICH资源上发送 加扰后的 PHICH之后, 还包括: 用户终端根据自身所属的用户特定的小区标识对接收到得所述加扰后的 PHICH进行解扰码。
10. 根据权利要求 6 至 9 中任一项所述的方法, 其中, 所述基站没有在用户所属 PHICH资源上向该用户发送物理下行控制信道,所述基站在确定的所述 PHICH 资源上发送加扰后的 PHICH之后, 还包括:
接收到所述加扰后的 PHICH的用户终端不在自身所属的 PHICH资源上监 听或接收所述物理下行控制信道。
11. 根据权利要求 6至 9中任一项所述的方法, 其中, 所述基站没有在所述 PHICH 资源上发送物理下行控制信道,所述基站在确定的所述 PHICH资源上发送加扰 后的 PHICH之后, 还包括:
接收到所述加扰后的 PHICH的用户终端不在所述 PHICH资源上监听或接 收所述物理下行控制信道。
12. 一种物理混合重传请求校验指示信道 PHICH的发送装置, 位于基站侧, 包括: 预处理模块, 设置为按照用户特定的方式确定 PHICH资源和 /或使用当前 的 PHICH的扰码对 PHICH进行加扰;
发送模块, 设置为在确定的所述 PHICH资源上发送加扰后的 PHICH。
13. 根据权利要求 12所述的装置,其中,所述预处理模块还设置为按照用户特定的 小区标识确定 PHICH的频域资源。
14. 根据权利要求 12所述的装置,其中,所述预处理模块还设置为按照用户特定的 小区标识使用当前的 PHICH的扰码对 PHICH进行加扰。
15. 根据权利要求 13或 14所述的装置, 其中, 还包括:
通知模块,设置为通过用户特定的无线资源控制 RRC信令将所述用户特定 的小区标识通知给用户终端。
16. 根据权利要求 13或 14所述的装置, 其中, 所述用户特定的小区标识为用于确 定物理下行解调参考信号的用户特定的小区标识。
17. 根据权利要求 13所述的装置, 其中, 所述预处理模块还设置为在 PHICH为扩 展形式情况下, 按照下述方式确定多播单频网子帧或时分双工系统子帧 1和 6 中的 PHICH的频域资源:
(Ld ; /"i」+ ')励 d "¾ 。
[Km - ni[ /nx \ + m '+ η,, /3 Jjmod η,, i = l
[ ω' - ni[ 2
Figure imgf000028_0001
其中, N 表示所述用户特定的小区标识, 为第 //个符号中物理控制格 式指示信道 PCFICH之外剩余的资源单元组 REG总数, '为 PHICH组的序号, "!为/; =1时的",,。
18. 根据权利要求 13所述的装置, 其中, 所述预处理模块还设置为在 PHICH为非 扩展形式情况下, 按照下述方式确定除多播单频网子帧和时分双工系统中子帧 1和 6之外的 PHICH的频域资源:
Figure imgf000029_0001
其中, N 表示所述用户特定的小区标识, 为第 //个符号中物理控制格 式指示信道 PCFICH之外剩余的资源单元组 REG总数, '为 PHICH组的序号, "。为 /; =0时的? ¾。
19. 根据权利要求 14所述的装置,其中,所述预处理模块还设置为按照下述方式确 定所述 PHICH的扰码:
其中, 为该扰码序列生成器的初始化值, 表示所述用户特定的小区 标识, 为时隙索引。
20. 一种用户终端, 包括:
接收模块, 设置为接收来自基站的加扰后的物理混合重传请求校验指示信 道 PHICH, 其中, 所述加扰后的 PHICH是所述基站在按照用户特定的方式确 定的 PHICH资源上发送的,和 /或所述加扰后的 PHICH为所述基站按照所述用 户特定的方式使用当前的 PHICH的扰码对 PHICH进行加扰后获得的。
21. 根据权利要求 20所述的用户终端, 其中, 还包括:
解扰码模块, 设置为根据自身所属的用户特定的小区标识对接收到得所述 加扰后的 PHICH进行解扰码。
22. 根据权利要求 20所述的用户终端,其中,所述接收模块还设置为在所述基站没 有在用户所属 PHICH资源上向该用户发送物理下行控制信道,而在确定的所述 PHICH资源上发送加扰后的 PHICH的情况下,不在所述用户终端所属的 PHICH 资源上监听或接收所述物理下行控制信道。
23. 根据权利要求 20所述的用户终端,其中,所述接收模块还设置为在所述基站没 有在所述 PHICH资源上发送物理下行控制信道, 而在确定的所述 PHICH资源 上发送加扰后的 PHICH的情况下, 不在所述 PHICH资源上监听或接收所述物 理下行控制信道。
24. 一种物理混合重传请求校验指示信道 PHICH的发送系统, 所述发送系统包括: 权利要求 12至 19中任一项所述的装置和权利要求 20至 23中任一项所述的用 户终端。
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