WO2012019412A1 - Procédé et système de configuration d'un signal de référence de sondage - Google Patents

Procédé et système de configuration d'un signal de référence de sondage Download PDF

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Publication number
WO2012019412A1
WO2012019412A1 PCT/CN2010/080333 CN2010080333W WO2012019412A1 WO 2012019412 A1 WO2012019412 A1 WO 2012019412A1 CN 2010080333 W CN2010080333 W CN 2010080333W WO 2012019412 A1 WO2012019412 A1 WO 2012019412A1
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Prior art keywords
bits
indication information
bit
resource
information
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PCT/CN2010/080333
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English (en)
Chinese (zh)
Inventor
戴博
王瑜新
喻斌
梁春丽
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中兴通讯股份有限公司
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Publication of WO2012019412A1 publication Critical patent/WO2012019412A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for configuring a Sounding Reference Signal (SRS). Background technique
  • the uplink physical channel of the Long Term Evolution (LTE) system includes a Physical Random Access Channel (PRACH), a Physical Uplink Shared Channel (PUSCH), and a physical uplink. Control channel (Physical uplink control channel, abbreviated as PUCCH).
  • the PUSCH has two different cyclic prefixes (Cyclic Prefix, CP for short), which are Normal Cyclic Prefix (Normal CP) and Extended Cyclic Prefix (Extended Cyclic Prefix).
  • Each sub-frame of a PUSCH consists of two slots (Slots). For different cyclic prefix lengths, the position of the Demodulation Reference Signal (DMRS) in the subframe will not be located.
  • FIG. 1 is a schematic diagram of the time domain position of a prior art demodulation reference signal.
  • each subframe contains two DMRS symbols
  • FIG. 1a is a schematic diagram of DMRS time domain positions when a normal cyclic prefix is used
  • each subframe contains 14 orthogonal frequency division multiplexing (Orthogonal Frequency Division). Multiplexing (abbreviated as OFDM) symbols, including DMRS symbols, OFDM symbols represent the time domain position of one subframe
  • Figure lb is a schematic diagram of the DMRS time domain position when the extended cyclic prefix is used.
  • Each subframe contains 12 time domain data. OFDM symbol.
  • the physical downlink control channel PDCCH is used to carry uplink and downlink scheduling information, and uplink power control information.
  • the base station e-Node-B, referred to as eNB for short
  • eNB User Equipment
  • UE User Equipment
  • the Downlink Control Information (DCI) format is divided into DCI formats 0, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, and so on. among them,
  • DCI format 0 is used to indicate a physical uplink shared channel (Physical uplink shared channel, Scheduling for short)
  • DCI format 1 , 1A, IB, 1C, ID is used for different transmission modes of the Physical Downlink Shared Channel (PDSCH) of a single transport block;
  • PDSCH Physical Downlink Shared Channel
  • DCI format 2, 2A is used for different transmission modes of downlink PDSCH space division multiplexing
  • DCI format 3A is used for transmission of power control commands of physical uplink control channel (PUCCH) and PUSCH.
  • PUCCH physical uplink control channel
  • the above DCI format 0, 1A, 3, 3A has the same transport block size, and DCI format 0, 1A is formatted by 1 bit.
  • the DCI format for indicating the physical uplink shared channel scheduling includes a 5-bit modulation coding mode and redundancy version indication information, and the state of the 5-bit representation is as shown in Table 1.
  • the DCI format for indicating the physical downlink shared channel scheduling includes 5-bit modulation and coding mode indication information, and the state of the 5-bit representation is as shown in Table 2.
  • the broadcast information of the LTE system is divided into a MIB (Main Information Block) and a SIB (Scheduled Information Block), where the MIB is transmitted on the PBCH (Physical Broadcast Channel). Also known as SI, that is, Scheduled Information) is transmitted on the PDSCH.
  • MIB Main Information Block
  • SIB Serviced Information Block
  • SRS is a signal used between a user terminal and a base station to measure Channel State Information (CSI).
  • CSI Channel State Information
  • the UE sends an uplink SRS on the last data symbol of the transmission subframe according to the bandwidth indicated by the eNB, the frequency domain location, the sequence cyclic shift, the period, and the subframe offset.
  • the eNB determines the uplink CSI of the UE according to the received SRS, and performs operations such as frequency domain selection scheduling and closed loop power control according to the obtained CSI.
  • the SRS sequence sent by the UE is obtained by cyclically shifting a root sequence » in the time domain.
  • different SRS sequences can be obtained, and
  • the obtained SRS sequences are mutually orthogonal to each other, and therefore, these SRS sequences can be allocated to different UEs to implement code division multiple access between UEs.
  • n RS is indicated by 3 bit signaling, which are 0, 1, 2, 3, 4, 5, 6, and 7, respectively. That is to say, in the same time-frequency resource, the UE in the cell has 8 available code resources, and the eNB can configure up to 8 UEs to simultaneously send the SRS on the same time-frequency resource. Equation (1) can be regarded as dividing the SRS sequence into 8 parts at equal intervals in the time domain, but since the length of the SRS sequence is a multiple of 12, The minimum length of the SRS sequence is 24.
  • the frequency domain bandwidth of the SRS is configured in a tree structure.
  • Each SRS bandwidth configuration corresponds to a tree structure.
  • the SRS bandwidth of the highest layer (or the first layer) (SRS-Bandwidth) corresponds to the maximum SRS bandwidth of the SRS bandwidth configuration, or SRS bandwidth. range.
  • the UE determines the initial frequency domain position of the SRS according to the upper layer signaling frequency domain position “RRC” sent by the eNB.
  • FIG. 2 is a prior art allocation different WRRC. Schematic diagram of the frequency domain initial position of the SRS transmitted by the UE. As shown in FIG.
  • the sequence used by the SRS is selected from the demodulation pilot sequence group.
  • the SRS bandwidth of the UE is 4 Resource Blocks (RBs)
  • RBs Resource Blocks
  • a sequence of CG Computer Generated, referred to as A sequence of CG
  • ZC Zadoff-Chu
  • the sub-carriers of the SRS are placed at intervals, that is, the SRS is transmitted using a comb structure, and the number of frequency combs in the LTE system is used. 2, which also corresponds to the time domain repeat coefficient value (Repetition Factor, RPF for short) is 2.
  • RPF Reference Factor
  • multiple UEs may use different cyclic shifts on the same frequency comb, and then send SRS through code division multiplexing, or two UEs may be combed on different frequencies and transmitted by frequency division multiplexing.
  • SRS For example, in an LTE system, a UE that transmits an SRS within a certain SRS bandwidth (4 RBs) can use 8 cyclic shifts and 2 frequency combs that can be used, so the UE has a total of 16 A resource that can be used to send SRS, that is, up to 16 SRSs can be sent simultaneously within this SRS bandwidth. Since the uplink single user is not supported in the LTE system Single User Multiple Input Multiple Output (SU-MI MO for short),
  • the UE can only transmit one SRS at each time, so one UE only needs one SRS resource. Therefore, within the above SRS bandwidth, the system can multiplex up to 16 UEs at the same time.
  • the LTE-Advanced (LTE-A) system is the next-generation advanced system of the LTE system. It supports SU-MIM0 in the uplink and can use up to four antennas as uplink transmitting antennas. That is to say, the UE can simultaneously transmit SRS on multiple antennas at the same time, and the eNB needs to estimate the state on each channel according to the SRS received on each antenna.
  • non-pre-coded (ie, antenna-specific) SRS should be used, and PUSCH DMRS should be pre-coded.
  • the base station can estimate the original CSI of the uplink by receiving the non-precoded SRS, and the pre-coded DMRS cannot make the base station estimate the original CSI of the uplink.
  • the UE transmits the non-precoded SRS by using multiple antennas the SRS resources required by each UE are increased, which causes the number of UEs that can be simultaneously multiplexed in the system to decrease. How to properly design the SRS resource to implement SRS more efficiently and dynamically, and save signaling overhead is a problem to be solved. Summary of the invention
  • An object of the present invention is to provide a method and a system for configuring a reference signal to implement a configuration of aperiodic SRS, so as to solve the problem that the UE cannot dynamically transmit aperiodic SRS dynamically.
  • the present invention provides a method for configuring a measurement reference signal, including:
  • the base station sends downlink control information to the user terminal, and the downlink control information triggers the user terminal to send the aperiodic SRS, and instructs the user terminal to use the resource used in the aperiodic SRS.
  • the method further includes: after receiving the downlink control information, the user terminal enters a process of sending aperiodic SRS according to the trigger of the downlink control information and the resource indicated by the downlink control information.
  • the method further includes: the user terminal, according to the resource indicated by the downlink control information, combined with the aperiodic SRS resource type information pre-configured by the high layer signaling, to learn to send the non-
  • the resource used in the periodic SRS the resource type information may include any one of the following information: cyclic shift information, frequency domain location information, user-specific SRS bandwidth information, and location information of the frequency comb.
  • the downlink control information is downlink control information used for downlink scheduling; and the step of triggering, by the downlink control information, the user terminal to send an aperiodic SRS, and instructing the user terminal to use a resource used in aperiodic SRS
  • the method includes: the downlink control information used for downlink scheduling triggers the user terminal to send an aperiodic SRS, and indicates the resource used by the user terminal to send an aperiodic SRS; or, by using the downlink control information used for downlink scheduling The user terminal is triggered to send an aperiodic SRS when the downlink data is retransmitted, and the resource used by the user terminal to send the aperiodic SRS is instructed.
  • the step of triggering the user terminal to send the aperiodic SRS by using the downlink control information, and indicating the resource used by the user terminal to send the aperiodic SRS includes: carrying the trigger bit and the resource indication information in the downlink control information,
  • the trigger bit is used to trigger the user terminal to send an aperiodic SRS
  • the resource indication information is used to indicate a resource used by the user terminal to send an aperiodic SRS.
  • the trigger bit occupies one or more bits; the resource indication information occupies n bits, n is an integer and l n ⁇ 15.
  • the downlink control information is downlink control information used for uplink scheduling, where the trigger bit is a newly added bit or any one or more of the following bits, and the resource indication information is the following bit Any one or more of the bits, and the bit used by the resource indication information does not conflict with the bit used by the trigger bit:
  • a 1-bit frequency hopping flag bit a modulation coding mode and a usable bit of the redundancy version indication information, including: the modulation coding mode and the redundancy version indication information are higher or higher 2 bits or higher 3 bits or higher 4 bits or All bits; the available bits of the cyclic shift indication information of the uplink demodulation reference signal, including: 1 bit or 2 bits in the cyclic shift indication information of the uplink demodulation reference signal; resource block allocation and frequency hopping resource allocation information
  • the available bits include: the source block allocation and the upper 2 bits or the upper 3 bits of the frequency hopping resource allocation information.
  • the downlink control information is downlink control information for indicating uplink multi-antenna transmission, where the trigger bit is a newly added bit or any one or more of the following bits, and the resource indication information is Any one or more of the following bits, and the resource indicates the bit used by the information Does not conflict with the bits used by the trigger bit:
  • the resource indication information is implemented in one or more of the following manners: when the frequency hopping of the uplink PUSCH is not enabled and/or the uplink PUSCH does not use high-order modulation, the frequency hopping flag bit is used. / or modulation coding mode and redundancy version indication information any one or more bits of the available bits as resource indication information;
  • the modulation coding mode and the redundancy version indication information are used as the resource indication information, and the modulation and coding mode index i MCS is indicated as 0 to 28 by the modulation and coding mode and the redundancy version indication information.
  • the modulation and coding mode index i MCS is indicated as 0 to 28 by the modulation and coding mode and the redundancy version indication information.
  • the 2 bits in the 5-bit modulation coding mode and the redundancy version indication information indicate the redundancy version, and the remaining 3 bits serve as resources. Indication information;
  • the cyclic shift indication of the uplink demodulation reference signal is used to indicate any of the available bits. Or multiple bits as resource indication information;
  • the number of cyclic shifts of the uplink demodulation reference signal is 2 or 4, or 2 or 4 cyclic shifts are used, and the frequency hopping flag is used.
  • the cyclic shift indication information of the uplink demodulation reference signal is any one or more bits of the available bits as resource indication information;
  • any one or more of the available bits of the resource block allocation and the frequency hopping resource allocation information are used as resource indication letters. Interest.
  • the trigger bit is implemented in one or more of the following ways:
  • any one of the available bits of the frequency hopping flag or the modulation coding mode and the redundancy version indication information is used as a trigger.
  • the modulation coding mode and the redundancy version indication information are used as trigger bits, and the modulation coding mode index/ MCS is indicated as 0 to 28 by the modulation coding mode and the redundancy version indication information.
  • Any one of the k states triggers the aperiodic SRS, K k ⁇ 29; when the uplink transmitted data is retransmitted data, or the new data indicator bit (NDI) is 0, the 5-bit modulation coding mode is used
  • 2 bits in the redundancy version indication information indicate a redundancy version, and any one or more of the remaining 3 bits serve as a trigger bit;
  • the cyclic shift indication of the uplink demodulation reference signal is used to indicate any of the available bits.
  • a trigger bit As a trigger bit
  • any one of the available bits of the resource block allocation and the frequency hopping resource allocation information is used as the trigger bit.
  • the downlink control information is downlink control information used for downlink scheduling, where the trigger bit is a newly added bit or any one or more of the following bits, and the resource indication information is the following bits. Any one or more of the bits, and the bit used by the resource indication information does not conflict with the bit used by the trigger bit:
  • the available bits of the modulation coding mode indication information include: the modulation coding mode indicates the upper 1 bit or the upper 2 bits or the upper 3 bits or the upper 4 bits or all bits of the information; the 2-bit redundancy version bit; the 1-bit centralized type / distributed VRB allocation flag; available bits of resource block allocation information, including: the upper 2 bits or the upper 3 bits of the resource block allocation information.
  • the resource indication information is implemented in one or more of the following manners: when the restricted retransmission combining mode is tracking merge, or when the number of available redundancy versions is 1 or 2, the redundancy version is used. Any one or more of the bits as resource indication information;
  • VRB allocation When the virtual resource block (VRB) allocation is fixed, centralized or distributed, or PDSCH does not fail.
  • VRB allocation flag and/or modulation coding mode When using high-order modulation, using the centralized/distributed VRB allocation flag and/or modulation coding mode to indicate any one or more bits of the information available information as resource indication information;
  • the modulation and coding mode indication information is used as the resource indication information, and the modulation and coding mode indication information is used to indicate the modulation coding mode index/ MCS to any of the k states in the range of 0 to 28.
  • the 2 bits in the 5-bit modulation coding mode indication information indicate the redundancy version, and the remaining 3 bits are used as the resource indication information;
  • any one or more bits of the resource block allocation information available bits are used as the resource indication information.
  • the trigger bit is implemented in one or more of the following ways:
  • any one of the redundancy version bits is used as the trigger bit;
  • the centralized/distributed VRB allocation flag or modulation coding mode is used to indicate any one of the available bits of the information as a trigger bit;
  • the modulation and coding mode indication information is used as a trigger bit, and the modulation and coding mode indication information is used to indicate the modulation coding mode index/ MCS as any one of the k states of 0 to 28.
  • the modulation and coding mode indication information is used to indicate the modulation coding mode index/ MCS as any one of the k states of 0 to 28.
  • the 2 bits in the 5-bit modulation coding mode indication information indicate the redundancy version, and any of the remaining 3 bits or Multiple bits as trigger bits;
  • the step of triggering the user terminal to send the aperiodic SRS by using the downlink control information, and indicating the resource used by the user terminal to send the aperiodic SRS includes: triggering the aperiodic SRS and indicating the resource in the downlink control information
  • the joint indication information is used to trigger the user terminal to send the aperiodic SRS, and simultaneously instruct the user terminal to use the resource used in the aperiodic SRS.
  • the joint indication information occupies m bits, where m is an integer and 2 ⁇ m ⁇ 15.
  • the downlink control information is downlink control information used for uplink scheduling
  • the joint indication information is any one or more of the following bits: a 1-bit frequency hopping identifier; a modulation and coding mode and redundancy
  • the available bits of the version indication information including: the high-order bit or the high-order 2 bits or the high-order 3 bits or the high-order 4 bits or all bits of the modulation coding mode and the redundancy version indication information; a cyclic shift indication of the uplink demodulation reference signal
  • the available bits of the information include: 1 bit or 2 bits in the cyclic shift indication information of the uplink demodulation reference signal; available bits of the resource block allocation and the frequency hopping resource allocation information, including: the resource block allocation and the frequency hopping resource The upper 2 or higher 3 bits of the allocation information.
  • the downlink control information is downlink control information for indicating uplink multi-antenna transmission
  • the joint indication information is any one or more of the following bits: a 1-bit frequency hopping identifier; enabling transmission
  • the available coding bits of the block corresponding to the modulation coding mode and the redundancy version indication information including: the modulation coding mode and the redundancy version indication information are higher 1 bit or higher 2 bits or higher 3 bits or higher 4 bits or all bits;
  • the available bits of the cyclic shift indication information of the demodulation reference signal include: 1 bit or 2 bits in the cyclic shift indication information of the uplink demodulation reference signal; available bits of the resource block allocation and the frequency hopping resource allocation information, including : The upper 2 bits or the upper 3 bits of the resource block allocation and the frequency hopping resource allocation information.
  • the joint indication information is implemented in one or more of the following manners: when the frequency hopping of the uplink PUSCH is not enabled and/or the uplink PUSCH does not use high-order modulation, the frequency hopping flag is used.
  • One or more bits of the modulation coding mode and the redundancy version indication information available bits are used as joint indication information, or only one or more bits of the modulation coding mode and the redundancy version indication information available bits are used as joint indication information;
  • the modulation coding mode and the redundancy version indication information are used as joint indication information, and the modulation and coding mode and the redundancy version indication information are modulated and coded.
  • the mode index / MCS indication is any one of the k states of 0 to 28 to indicate the aperiodic SRS resource, K k ⁇ 29;
  • the 2 bits in the 5-bit modulation coding mode and the redundancy version indication information indicate the redundancy version, and the remaining 3 bits are combined. Indication information;
  • the cyclic shift indication of the uplink demodulation reference signal is used to either or any of the available bits. Multiple bits as joint indication information;
  • the frequency hopping flag and the uplink solution are used. Adjusting, by the cyclic shift indication information of the reference signal, any one or more bits of the available bits of the information as joint indication information;
  • any one or more of the available bits of the resource block allocation and the frequency hopping resource allocation information are used as the joint indication information.
  • the downlink control information is downlink control information used for downlink scheduling
  • the joint indication information is any one or more of the following bits:
  • the available bits of the modulation coding mode indication information include: the modulation coding mode indicates the upper 1 bit or the upper 2 bits or the upper 3 bits or the upper 3 bits or all bits of the information; the 2-bit redundancy version bit; the 1-bit centralized type / distributed VRB allocation flag; available bits of resource block allocation information, including: the upper 2 bits or the upper 3 bits of the resource block allocation information.
  • the joint indication information is implemented in one or more of the following manners: when the restricted retransmission merge mode is tracking merge, or when the number of available redundancy versions is 1 or 2, the redundancy version is used. Any one or more of the bits as joint indication information;
  • the centralized/distributed VRB allocation flag and the modulation coding mode indicate any of the available bits of information. Or multiple bits are used as joint indication information, or only one or more bits of the information available bits are indicated by the modulation coding mode as joint indication information;
  • the modulation coding mode indication information is used as a joint finger. And indicating, by the modulation and coding mode indication information, the modulation coding mode index/ MCS indication as any one of 0 to 28 to indicate the aperiodic SRS resource;
  • the 2 bits in the 5-bit modulation coding mode indication information indicate the redundancy version, and the remaining 3 bits are used as the joint indication information;
  • the 2-bit redundancy version bit is used as the joint indication information; when the unit of the PDSCH resource allocation of the user terminal is 2 resource blocks, the resource block allocation information is used in any of the available bits. One or more of them as joint instructions.
  • the format of the downlink control information used for uplink scheduling is format 0.
  • the format of the downlink control information used for downlink scheduling is format 1A.
  • the present invention also provides a configuration system for measuring a reference signal, including a base station and a user terminal, where:
  • the base station is configured to send downlink control information to the user terminal, and the downlink control information is used to trigger the user terminal to send an aperiodic SRS, and instruct the user terminal to use a resource used in aperiodic SRS;
  • the user terminal is configured to send an aperiodic SRS at a resource indicated by the downlink control information after receiving the downlink control information.
  • the aperiodic SRS configuration method of the present invention can implement the terminal to send aperiodic SRS, improve the utilization of SRS resources, and improve the flexibility of resource scheduling.
  • Figure la and Figure 1b are schematic diagrams of time domain positions of a prior art demodulation reference signal
  • FIG. 2 is a schematic diagram of a frequency domain initial position of a prior art SRS for transmitting SRSs according to the prior art
  • FIG. 3 is a schematic diagram of a comb structure of a prior art SRS
  • FIG. 4 is a schematic structural diagram of a configuration system of a non-periodic SRS of the present invention. Preferred embodiment of the invention
  • the UE may also configure the UE to transmit the SRS aperiodicly through the downlink control information.
  • the inventive concept is:
  • the base station sends downlink control information to the user terminal, and the downlink control information triggers the user terminal to send an aperiodic SRS, and instructs the user terminal to use the resource used in the non-periodic SRS.
  • the foregoing configuration method enables the UE to dynamically and flexibly transmit the SRS periodically, thereby improving the utilization of the SRS resource.
  • the user terminal After receiving the downlink control information, the user terminal enters a process of sending an aperiodic SRS according to the trigger of the downlink control information and the resource indicated by the downlink control information.
  • the user terminal can learn the specific resource for sending the aperiodic SRS according to the resource indicated by the downlink control information and the aperiodic SRS resource type information pre-configured by the high layer signaling.
  • the resource type information includes any one of the following information: cyclic shift information, frequency domain location information, user-specific SRS bandwidth information, and frequency comb location information.
  • the downlink control information is downlink control information for downlink scheduling
  • the downlink control information for downlink scheduling triggers the user terminal to send an aperiodic SRS, and instructs the user terminal to use when sending an aperiodic SRS.
  • the downlink control information used for downlink scheduling triggers the user terminal to send an aperiodic SRS when the downlink data is retransmitted, and instructs the user terminal to use the resource used in the aperiodic SRS.
  • the downlink control information is used to trigger the user terminal to send an aperiodic SRS, and the resource used by the user terminal to send the aperiodic SRS is implemented in the following two preferred implementation manners:
  • the downlink control information carries a trigger bit and resource indication information, where the trigger bit is used to trigger the user terminal to send an aperiodic SRS, and the resource indication information is used to instruct the user terminal to send an aperiodic SRS.
  • the resources used at the time are used at the time.
  • the trigger bit occupies 1 or more bits; the resource indication information occupies n bits, n is an integer and l n ⁇ 15.
  • any one or more of the following bits may be selected or the newly added bit may be used as the trigger bit, and any one or more of the following bits may be selected as the resource indication information, and the selection is required. Ensure that the trigger bit does not conflict with the bits used by the resource indication information:
  • a 1-bit hopping flag a modulation and coding scheme and a redundancy version (Modulation and coding scheme and redundancy version) indicating information available bits, including: the modulation coding mode and the upper 1 bit of the redundancy version indication information Or a high 2 bit or a high 3 bit or a high 4 bit or all bits; an available bit of the cyclic shift indication information of the uplink demodulation reference signal, including: 1 bit in the cyclic shift indication information of the uplink demodulation reference signal Or 2 bits; resource block allocation and available bits of the resource block assignment and hopping resource allocation information, including: the resource block allocation and the frequency of the frequency hopping resource allocation information are 2 or 3 Bit.
  • any of the available bits of the frequency hopping flag and/or the modulation coding mode and the redundancy version indication information may be used or Multiple bits are used as resource indication information to indicate the resources for transmitting the aperiodic SRS.
  • any one of the frequency-hopping flag or the modulation coding mode and the redundancy version indication information available bits may be used.
  • the trigger bit is used to trigger the transmission of the aperiodic SRS. However, it is necessary to ensure that the bits used by the resource indication information do not conflict with the bits used by the trigger bit.
  • the modulation and coding mode and the redundancy version indication information are used as the resource indication information, and the modulation and coding mode index/ MCS is indicated as 0 to 28 by using the modulation and coding mode and the redundancy version indication information. Any of the k states in the middle indicates a non-periodic SRS resource, lk 29.
  • the modulation and coding mode and the redundancy version indication information are used as the trigger bits, and the modulation and coding mode index/ MCS is indicated as 0 by the modulation and coding mode and the redundancy version indication information.
  • any of the k states in 28 triggers the aperiodic SRS. However, it is necessary to ensure that the bits used by the resource indication information do not conflict with the bits used by the trigger bit.
  • the uplink transmission data is retransmitted data, or the new data indication bit (NDI) is 0,
  • the 2-bit modulation coding mode and the 2 bits in the redundancy version indication information indicate the redundancy version, and the remaining 3 bits serve as resource indication information.
  • the uplink transmission data is retransmitted data, or the new data indication bit (NDI) is 0, the 2 bits in the 5-bit modulation coding mode and the redundancy version indication information indicate the redundancy version, and the remaining 3 Any one or more of the bits are used as trigger bits.
  • any of the available bits of the cyclic shift indication information of the uplink demodulation reference signal may be used.
  • One or more bits are used as resource indication information to indicate the resource for transmitting the aperiodic SRS.
  • the cyclic shift indication information of the uplink demodulation reference signal can be used in the available bits. Any bit of the bit acts as a trigger bit to trigger the transmission of the aperiodic SRS. However, it is necessary to ensure that the bits used by the resource indication information do not conflict with the bits used by the trigger bit.
  • the number of cyclic shifts of the uplink demodulation reference signal is 2 or 4, or 2 or 4 cyclic shifts are fixed, and the frequency hopping flag is used.
  • the cyclic shift indication information of the uplink demodulation reference signal is any one or more bits of the available bits as resource indication information.
  • any one or more of the available bits of the resource block allocation and the frequency hopping resource allocation information may be used as the resource indication information to indicate the transmission.
  • Acyclic SRS resources when the unit of PUSCH resource allocation of the user terminal is 2 RBs, any one of the available bits of the resource block allocation and the frequency hopping resource allocation information may be used as a trigger bit to trigger the transmission of the aperiodic SRS.
  • the transport block may be never enabled. Selecting bits in the corresponding modulation coding mode and indication information of the redundancy version (for example, 5 bits) As a trigger bit and / or as a resource indication information.
  • the format of the downlink control information at this time is called: a downlink control information format for indicating uplink multi-antenna transmission.
  • any bit or multiple bits of the following bits may be used or the newly added bit may be used as the trigger bit, and Any one or more of the following bits are used as the resource indication information, and it is necessary to ensure that the trigger bit does not conflict with the bit used by the resource indication information:
  • the modulation and coding scheme indicates the available bits of the information, including: the modulation coding mode indicates the upper 1 bit or the upper 2 bits or the upper 3 bits or the upper 4 bits or all bits of the information; the 2-bit redundancy version bit 1 bit of centralized/distributed VRB assignment flag; available bits of resource, block, and resource block assignment information, including: the upper 2 bits of the resource block allocation information or High 3 digits.
  • any one or more of the redundancy version bits may be used as the resource indication information.
  • the resource indication information To indicate the resources that send aperiodic SRS.
  • the retransmission combining mode is CC merge, or when the number of available redundancy versions is 1 or 2
  • any one of the redundancy version bits can be used as a trigger bit to trigger the transmission of the aperiodic SRS.
  • the centralized/distributed VRB can be used.
  • / or Modulation and coding scheme indicates any one or more bits of the information available information as resource indication information to indicate the resource for transmitting the aperiodic SRS.
  • the centralized/distributed VRB allocation flag or modulation coding mode may be used to indicate any bit of the information available bits. The trigger bit triggers the transmission of the aperiodic SRS.
  • the downlink transport block is a retransmitted transport block
  • the modulation and coding mode indication information is used as a trigger bit, and the modulation and coding mode indication information is used to indicate the modulation coding mode index/ MCS to be in the k state of 0 to 28 Any of them to trigger an aperiodic SRS.
  • the modulation and coding mode indication information does not conflict with the bits used by the trigger bit.
  • the 2 bits in the 5-bit modulation coding mode indication information indicate the redundancy version, and the remaining 3 bits serve as the resource indication information.
  • the 2 bits in the 5-bit modulation coding mode indication information indicate the redundancy version, and any of the remaining 3 bits
  • One or more bits are used as trigger bits. However, it is necessary to ensure that the bits used by the resource indication information do not conflict with the bit bits used by the trigger bit.
  • any one or more of the available bits of the resource block allocation information may be used as resource indication information to indicate the resource for transmitting the aperiodic SRS.
  • any one of the available bits of the resource block allocation information can be used as a trigger bit to trigger the transmission of the aperiodic SRS.
  • the format of the downlink control information used for uplink scheduling is format 0; and the format of downlink control information used for downlink scheduling is format 1A.
  • the downlink control information carries a triggering aperiodic SRS and indicating a resource association.
  • the joint indication information is used to trigger the user terminal to send an aperiodic SRS, and simultaneously instruct the user terminal to use a resource used in aperiodic SRS. That is, the joint indication information has the function of triggering and indicating resources at the same time.
  • the joint indication information occupies m bits, m is an integer and 2 m ⁇ 15.
  • any of the following bits may be used as the joint indication information:
  • a 1-bit hopping flag a modulation and coding scheme and a redundancy version (Modulation and coding scheme and redundancy version) indicating information available bits, including: the modulation coding mode and the upper 1 bit of the redundancy version indication information Or a high 2 bit or a high 3 bit or a high 4 bit or all bits; an available bit of the cyclic shift indication information of the uplink demodulation reference signal, including: 1 bit in the cyclic shift indication information of the uplink demodulation reference signal Or 2 bits; resource block allocation and available bits of the resource block assignment and hopping resource allocation information, including: the resource block allocation and the frequency of the frequency hopping resource allocation information are 2 or 3 Bit.
  • the frequency hopping flag and the modulation coding mode and the redundancy version indication information may be used as a joint of any number of bits.
  • the indication information indicates the resource for transmitting the aperiodic SRS, or only the modulation coding mode and the redundancy version indication information any number of bits are used as the joint indication information to indicate the resource for transmitting the aperiodic SRS.
  • the modulation coding mode and the redundancy version indication information are used as the joint indication information, and the modulation and coding mode index/ MCS is indicated as 0 to 28 by the modulation and coding mode and the redundancy version indication information.
  • the modulation and coding mode index/ MCS is indicated as 0 to 28 by the modulation and coding mode and the redundancy version indication information.
  • Any of the k states in the middle indicates aperiodic SRS resources, lk 29.
  • the 2 bits in the 5-bit modulation coding mode and the redundancy version indication information indicate the redundancy version, and the remaining 3 bits are combined. Instructions.
  • the cyclic shift indication information of the uplink demodulation reference signal may be used as any joint indication information to indicate the resource for transmitting the aperiodic SRS.
  • the number of cyclic shifts of the uplink demodulation reference signal is 2 or 4, or 2 or 4 cyclic shifts are fixed, and the frequency hopping flag is used.
  • the cyclic shift indication information of the uplink demodulation reference signal uses any one of the bits as the joint indication information.
  • any resource of the resource block allocation and the frequency hopping resource allocation information available bits may be used as the joint indication information to indicate the resource for transmitting the aperiodic SRS.
  • the downlink control information used for uplink scheduling when used to indicate uplink multi-antenna transmission, in addition to the above-mentioned optional bits, when only one transport block is enabled, the transmission may be never enabled.
  • the bit corresponding to the modulation coding mode and the redundancy version (5 bits) of the block is selected as the joint indication information.
  • the downlink control information format at this time is called: a downlink control information format for indicating uplink multi-antenna transmission.
  • any of the following bits may be used as the joint indication information:
  • the modulation and coding scheme indicates the available bits of the information, including: the modulation coding mode indicates the upper 1 bit or the upper 2 bits or the upper 3 bits or the upper 4 bits or all bits of the information; the 2-bit redundancy version bit 1 bit of centralized/distributed VRB assignment flag; available bits of resource, block, and resource block assignment information, including: 2 or higher of resource block allocation information 3 digits.
  • any multiple bits in the redundancy version bits may be used as joint indication information to indicate Send resources for aperiodic SRS.
  • the centralized/distributed VRB allocation flag and Modulation and coding scheme may be used to indicate any number of bits in the information available as a joint.
  • the indication information indicates the resource for transmitting the aperiodic SRS, or the modulation coding mode is used to indicate any of the information available bits as the joint indication information to indicate the resource for transmitting the aperiodic SRS.
  • the modulation and coding mode indication information is used as the joint indication information, and the modulation and coding mode indication information is indicated by the modulation and coding mode index i MCS as any one of 0 to 28 to indicate the non- Periodic SRS resources.
  • the 2 bits in the 5-bit modulation coding mode indication information indicate the redundancy version, and the remaining 3 bits are used as the joint indication information.
  • the 2-bit redundancy version bit is used as the joint indication information.
  • any of the resource block allocation information available bits may be used as the joint indication information to indicate the resource for transmitting the aperiodic SRS.
  • the format of the downlink control information used for uplink scheduling is format 0; and the format of downlink control information used for downlink scheduling is format 1A.
  • a configuration system for implementing the above method includes a base station and a user terminal (one or more), wherein:
  • the base station is configured to send downlink control information to the user terminal, and the downlink control information is used to trigger the user terminal to send an aperiodic SRS, and instruct the user terminal to use a resource used in aperiodic SRS;
  • the user terminal is configured to send an aperiodic SRS at a resource indicated by the downlink control information after receiving the downlink control information.
  • Embodiment 1
  • the base station triggers the user terminal to send the aperiodic SRS by using the downlink control information, and instructs the user terminal to select the aperiodic SRS by using the downlink control information.
  • the downlink control information is downlink control information used for uplink single antenna transmission, and the format is format 0.
  • the base station can agree with the user terminal:
  • any of the following methods may be used to trigger the transmission of the aperiodic SRS and the resources indicating the aperiodic SRS:
  • 2 bits are used as triggering aperiodic SRS and joint indication information indicating resources
  • the trigger bit is a new 1 bit, and the frequency hopping flag and/or modulation coding mode and the upper 1 or higher 2 bits of the redundancy version are used as resource indication information;
  • Acyclic SRS resources When the number of cyclic shifts of the uplink demodulation reference signal is 2 or 4, or 2 or 4 cyclic shifts are fixed, any of the following methods may be used to trigger the transmission of the aperiodic SRS and the indication.
  • Acyclic SRS resources :
  • Uplink demodulation reference signal The number of cyclic shifts available is 2 or 4, or 2 or 4 cyclic shifts are fixed, and 1 or 2 bits of the frequency hopping flag and the uplink demodulation reference signal cyclic shift indication information can be used as resources. Instructions.
  • the base station triggers the user terminal to send the aperiodic SRS by using the downlink control information, and instructs the user terminal to select the aperiodic SRS by using the downlink control information.
  • the downlink control information is downlink control information for uplink multi-antenna transmission.
  • the base station can agree with the user terminal:
  • the transmission of the aperiodic SRS and the resource indicating the aperiodic SRS may be triggered by any of the following methods. :
  • the following methods can be used to trigger the transmission of the aperiodic SRS and the resources indicating the aperiodic SRS: the new 1 bit is used as the trigger bit, and the modulation coding mode and redundancy are used.
  • the upper 1 bit of the version indication information is used as the resource indication information;
  • any of the following methods can be used to trigger the transmission of the aperiodic SRS and the resources indicating the aperiodic SRS:
  • a plurality of bits in the modulation coding mode and the redundancy version of the indication information corresponding to the transport block are not used as the trigger aperiodic SRS and the joint indication information indicating the resource.
  • the above conventions can exist at the same time as long as no conflicts occur.
  • the base station triggers the user terminal to send the aperiodic SRS by using the downlink control information, and instructs the user terminal to select the aperiodic SRS by using the downlink control information.
  • the downlink control information is downlink control information used for downlink scheduling
  • the format is format 1A.
  • the base station can agree with the user terminal:
  • any of the following methods may be used to trigger the non- The transmission of the periodic SRS and the resources indicating the aperiodic SRS:
  • any of the following methods may be used to trigger the transmission of the aperiodic SRS and the resources indicating the aperiodic SRS. :
  • the 1-bit centralized/distributed VRB allocation flag is used as the trigger bit, and the upper 1 bit of the modulation coding mode is used as the resource indication information; the upper 1 bit of the information is composed of 2 bits as the trigger aperiodic SRS and the indication resource. Joint instructions.
  • Embodiment 4 The base station triggers the user terminal to send the aperiodic SRS by using the downlink control information, and instructs the user terminal to select the aperiodic SRS by using the downlink control information.
  • the downlink control information is downlink control information used for downlink scheduling, and the format is format 1A.
  • the base station can agree with the user terminal:
  • any of the following methods may be used to trigger the sending of the aperiodic SRS and the resources indicating the aperiodic SRS:
  • any of the following methods may be used to trigger the transmission of the aperiodic SRS and indicate non- Periodic SRS resources:
  • the 1-bit centralized/distributed VRB allocation flag is used as the trigger bit, and the upper 1 bit of the modulation coding mode is used as the resource indication information; the upper 1 bit of the information is composed of 2 bits as the trigger aperiodic SRS and the indication resource. Joint instructions.
  • the trigger bit is a new one bit, and the high-order 1 bit of the modulation coding mode indication information and the centralized/distributed VRB allocation flag bit of 1 bit are used as the resource indication information.
  • the trigger bit is a new 1 bit, and the 3 bits in the modulation coding mode indication information are used as the resource indication information.
  • the base station triggers the user terminal to send the aperiodic SRS by using the downlink control information, and instructs the user terminal to select the aperiodic SRS by using the downlink control information.
  • the downlink control information is downlink control information used for uplink scheduling.
  • the base station can agree with the user terminal:
  • any one of the following methods may be used to trigger the transmission of the aperiodic SRS and the resource indicating the aperiodic SRS: 1) The bit is used as a trigger bit, and the high 2 bits or the upper 3 bits in the resource block allocation and the frequency hopping resource allocation information are used as the resource indication information;
  • the high 2 bits or the high 3 bits in the resource block allocation and the frequency hopping resource allocation information are used as the joint indication information for triggering the non-periodic SRS and indicating the resource.
  • the base station triggers the user terminal to send the aperiodic SRS by using the downlink control information, and instructs the user terminal to select the aperiodic SRS by using the downlink control information.
  • the downlink control information is downlink control information used for downlink scheduling.
  • the base station can agree with the user terminal:
  • any of the following methods may be used to trigger the transmission of the aperiodic SRS and the resources indicating the aperiodic SRS:
  • the base station triggers the user terminal to send the aperiodic SRS by using the downlink control information, and instructs the user terminal to select the aperiodic SRS by using the downlink control information.
  • the downlink control information is downlink control information used for uplink scheduling.
  • the base station can agree with the user terminal:
  • Modulation coding mode index / MCS is 0 to 28:
  • modulation coding mode indication information as joint indication information, indicating that the modulation coding mode index/ MCS is indicated as any one of k states in 0 to 28 by the modulation coding mode and the redundancy version indication information Periodic SRS resources, lk 29.
  • the terminal sends the aperiodic SRS and the aperiodic SRS resource used by the user terminal, or only the user terminal to send the aperiodic SRS, or only the aperiodic SRS resource used by the user terminal.
  • the base station triggers the user terminal to send the aperiodic SRS by using the downlink control information, and instructs the user terminal to select the aperiodic SRS by using the downlink control information.
  • the downlink control information is downlink control information used for downlink scheduling.
  • the base station can agree with the user terminal:
  • the downlink transmission block is a modulation coding mode indication information indicating that the retransmission transmission block indicates that the modulation coding mode index / MCS is 0 to 28:
  • modulation coding mode indication information as resource indication information, and indicating the modulation coding mode index J MCS as k in 0 to 28 by the modulation coding mode and the redundancy version indication information.
  • modulation coding mode indication information as joint indication information, indicating that the modulation coding mode index/ MCS is indicated as any one of k states in 0 to 28 by the modulation coding mode and the redundancy version indication information
  • Periodic SRS resources, lk 29 When the redundancy version is fixed to one or two, the 1 or 2 bits in the redundancy version are used to trigger the user terminal to send the aperiodic SRS and the aperiodic SRS resource used by the user terminal, or only the user terminal is sent to send the non-period.
  • Periodic SRS, or only aperiodic SRS resources used by the user terminal are used by the redundancy version.
  • the 2-bit modulation coding mode indicates that the 2-bit indicates the modulation mode, and the remaining 3 bits are used to trigger the user terminal to send the aperiodic SRS. And indicating the aperiodic SRS resource used by the user terminal, or only triggering the user terminal to send the aperiodic SRS, or only indicating the aperiodic SRS resource used by the user terminal.
  • the resource type is only related to the resource information (resource indication information or the joint indication information that triggers the aperiodic SRS and indicates the resource).
  • the resource type information indicates that the resource type is a frequency domain location, and the information carried in the resource information indicates a specific frequency domain location.
  • the resource information in the downlink control information may be further configured to be sent by using the resource information in the downlink control information.
  • the cyclic shift used by the periodic SRS is which of the four cyclic shifts.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any particular combination of hardware and software.
  • the present invention can implement the terminal to send aperiodic SRS, improve the utilization of SRS resources, and improve the flexibility of resource scheduling.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un système de configuration d'un signal de référence de sondage (SRS), le procédé et le système permettant de configurer un SRS apériodique et de résoudre le problème rencontré dans l'état de la technique, à savoir que le SRS apériodique ne peut pas être envoyé par un équipement utilisateur (UE) de manière dynamique et souple. Le procédé de configuration comprend les étapes suivantes : transmettre des informations de commande de liaison descendante à un terminal utilisateur par une station de base (BS), amener le terminal utilisateur à envoyer le SRS apériodique par l'intermédiaire des informations de commande de liaison descendante, et indiquer les ressources utilisées par le terminal utilisateur pour l'envoi du SRS apériodique.
PCT/CN2010/080333 2010-08-13 2010-12-27 Procédé et système de configuration d'un signal de référence de sondage WO2012019412A1 (fr)

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