WO2011020342A1 - 信道测量导频发送方法和系统 - Google Patents

信道测量导频发送方法和系统 Download PDF

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Publication number
WO2011020342A1
WO2011020342A1 PCT/CN2010/072586 CN2010072586W WO2011020342A1 WO 2011020342 A1 WO2011020342 A1 WO 2011020342A1 CN 2010072586 W CN2010072586 W CN 2010072586W WO 2011020342 A1 WO2011020342 A1 WO 2011020342A1
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WIPO (PCT)
Prior art keywords
channel measurement
channel
measurement pilot
mapped
subcarrier
Prior art date
Application number
PCT/CN2010/072586
Other languages
English (en)
French (fr)
Inventor
姜静
朱常青
张晨晨
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.)
Filing date
Publication date
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 US13/259,813 priority Critical patent/US9313677B2/en
Priority to MX2012002036A priority patent/MX2012002036A/es
Priority to EP10809475.6A priority patent/EP2469734B1/en
Priority to BR112012003568-1A priority patent/BR112012003568B1/pt
Priority to RU2012108558/07A priority patent/RU2518493C2/ru
Priority to JP2012525033A priority patent/JP2013502773A/ja
Publication of WO2011020342A1 publication Critical patent/WO2011020342A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26132—Structure of the reference signals using repetition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26134—Pilot insertion in the transmitter chain, e.g. pilot overlapping with data, insertion in time or frequency domain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • 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

Definitions

  • the present invention relates to a wireless communication system, and more particularly, to a channel measurement pilot transmission method and system for sharing resources on LTE and LTE-Advanced users in LTE-A.
  • a new generation wireless communication system such as Long-Term Evolution advance (LTE-Advance), advanced international wireless communication system (International) Mobile Telecommunication advance (referred to as IMT-Advance) introduces Coordinate Multipoint Transmission and Reception (hereinafter referred to as COMP).
  • LTE-Advance Long-Term Evolution advance
  • IMT-Advance International Mobile Telecommunication advance
  • COMP Coordinate Multipoint Transmission and Reception
  • CSI-RS channel measurement pilot
  • DMRS demodulation pilot
  • the channel measurement pilot works in the LTE-A system, and its mapping rules are not defined in detail.
  • Each channel measurement pilot is transmitted in one subframe or two adjacent subframes in one transmission period, and each channel is measured.
  • the pilots are repeatedly transmitted at equal intervals at full bandwidth in units of predetermined constituent units.
  • the newly designed ⁇ 1 , 2 , 4 , 8 ⁇ channel channel measurement pilots, the pattern of the 1 channel channel measurement pilot and the pattern of the previous port of the 2 channel channel measurement pilots, and the pattern of the 2 channel channel measurement pilots The same pattern as the first 2 ports of the 4-channel channel measurement pilot, and the frequency-domain interval of the channel measurement pilot predetermined components are equally repeated ⁇ 6, 8, 12, 16, 24, 30, 36, 42, 48 ⁇ .
  • the newly designed channel measurement pilots are repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component, and the channel measurement pilots of the eight channels are located on the 14th OFDM symbol of the transmission subframe, where 0 channel channel measurement pilots and The 1-channel channel measurement pilot is adjacently mapped on the 1st and 2nd subcarriers, the 2-channel channel measurement pilot and
  • the newly designed channel measurement pilot is repeatedly transmitted at equal intervals of the full bandwidth with two RBs as predetermined constituent units, and the channel measurement pilots of the eight channels are located on the 14th OFDM symbol of the transmission subframe, where the 0 channel
  • the measurement pilot is mapped on the first subcarrier, the ninth subcarrier, and the 17th subcarrier, and one channel measurement pilot is mapped on the second subcarrier, the tenth subcarrier, and the thirteenth subcarrier, and two channel measurement guides
  • the frequency is mapped to the 3rd subcarrier, the 11th subcarrier, and the 19th subcarrier, and the 3 channel measurement pilots are mapped on the 4th subcarrier, the 12th subcarrier, and the 20th subcarrier, and the 4 channel measurement pilots are mapped to On the 5th subcarrier, the 13th subcarrier, and the 21st subcarrier, the 5 channel measurement pilots are mapped on the 6th subcarrier, the 14th subcarrier, and the 22nd subcarrier,
  • the subcarriers, the 15th subcarrier and the 23rd subcarrier, and the 7 channel measurement pilots are mapped on the 8th subcarrier, the 16th subcarrier, and the 24th subcarrier.
  • the newly designed channel measurement pilot is repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component, and the channel measurement pilots of the eight channels are located on the eleventh and 14th OFDM symbols of the transmission subframe, where On the eleventh symbol, the zero channel channel measurement pilot and the one channel channel measurement pilot are adjacently mapped on the first and second subcarriers, and the two channel channel measurement pilots and the three channel channel measurement pilots are adjacently mapped to the first channel. 4.
  • the neighbor is mapped on the 4th and 5th subcarriers of the 14th symbol. Further, the newly designed channel measurement pilot is repeatedly transmitted at equal intervals of the full bandwidth with two RBs as predetermined constituent units, and the channel measurement pilots of the eight channels are located on the 14th OFDM symbol of the transmission subframe, where the 0 channel The measurement pilot is mapped on the third subcarrier, and the channel measurement pilot is mapped.
  • the two channel measurement pilots are mapped on the ninth subcarrier, the three channel measurement pilots are mapped on the twelfth subcarrier, and the four channel measurement pilots are mapped on the fifteenth subcarrier, 5
  • the channel channel measurement pilot is mapped on the 18th subcarrier, the 6 channel channel measurement pilots are mapped to the 21st subcarrier, and the 7 channel channel measurement pilots are mapped on the 24th subcarrier.
  • the newly designed channel measurement pilot is repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component, and the channel measurement pilot of 8 channels is located on the 11th OFDM symbol of the transmission subframe, where 0 channel measurement
  • the pilot and 4-channel channel measurement pilots are mapped on the 1st subcarrier, 1 channel measurement pilot and 5 channel measurement pilots are mapped on the 4th subcarrier, 2 channel measurement pilots and 6 channel measurement guides.
  • the frequency is mapped on the 7th subcarrier, and the 3 channel measurement pilots and the 7 channel measurement pilots are mapped on the 10th subcarrier.
  • the channel measurement pilot is repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component, and the channel measurement channel measurement pilot of the 8 channel is located on the sixth OFDM symbol of the transmission subframe, where 0 channel measurement
  • the pilot and one channel measurement pilot are adjacently mapped on the first and second subcarriers, and the two channel measurement pilots and the three channel measurement pilots are adjacently mapped on the seventh and eighth subcarriers, and 4, 5 6, 6 or 7 channel measurement pilot frequency i or position and the 0, 1, 2, 3 channel measurement pilot frequency i or position are the same, and each channel measurement pilot is the same in different antenna port configuration, At the same time, it supports the mapping of 1, 2, 4, and 8 channel measurement pilots.
  • the channel measurement pilot is repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component, wherein the channel measurement pilot channel measurement pilots of the 8 channels are located on the 6th and 11th OFDM symbols of the transmission subframe.
  • 0 CSI-RS is mapped on the 1st subcarrier of the 6th OFDM symbol
  • 1 CSI-RS is mapped on the 4th subcarrier of the 6th OFDM symbol
  • 2 CSI-RS is mapped to the 6th OFDM.
  • 3 CSI-RSs are mapped on the 10th subcarrier of the 6th OFDM symbol; 4 CSI-RSs are mapped on the 1st subcarrier of the 11th OFDM symbol, 5 CSI- RS is mapped on the 4th subcarrier of the 11th OFDM symbol, and 6 CSI-RSs are mapped on the 7th subcarrier of the 11th OFDM symbol, and 7 channels of 4 CSI-RS are mapped to the 11th OFDM symbol On the 10th subcarrier.
  • the channel measurement pilot is repeatedly transmitted at equal intervals of the entire bandwidth with one RB as a predetermined component, wherein the channel measurement pilots of the 8 channels are located on the 6th and 11th OFDM symbols of the transmission subframe, and the 0 channel CSI -RS and one CSI-RS are adjacently mapped on the first and second subcarriers of the sixth OFDM symbol, and two CSI-RSs and three CSI-RSs are adjacently mapped to the seventh of the sixth OFDM symbol.
  • On the 8 subcarriers 4, 5, 6, and 7 are mapped to the eleventh symbol, and their frequency domain positions are the same as 0, 1, 2, and 3, respectively.
  • the channel measurement pilot is repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component, wherein the eight channel measurement pilots are located on the sixth and eleventh OFDM symbols of the transmission subframe, and the zero channel CSI- RS and 1 CSI-RS are adjacently mapped on the 1st and 2nd subcarriers of the 6th OFDM symbol, and 2 CSI-RSs and 3 CSI-RSs are adjacently mapped to the 7th and 8th of the 6th OFDM symbol.
  • On the subcarriers 4, 5, 6, and 7 are mapped to the 14th symbol, and their frequency domain positions are the same as 0, 1, 2, and 3, respectively.
  • a channel measurement pilot transmission system including: a sending module, configured to: each channel measurement pilot in one subframe or two adjacent subframes in one transmission period The frame is transmitted, and each channel measurement pilot is repeatedly transmitted at equal intervals of the full bandwidth in units of predetermined constituent units.
  • the sending module may include: a first channel measurement pilot path setting unit, configured to newly design a ⁇ 1, 2, 4, 8 ⁇ channel channel measurement pilot, where one channel channel measurement pilot pattern and two channels The pattern of the previous port of the channel measurement pilot is the same, the pattern of the two channel measurement pilots is the same as the pattern of the first two ports of the four channel measurement pilots, and the pattern of the four channel measurement pilots and the eight channel measurement.
  • the first four ports of the pilot have the same pattern; and the second channel measurement pilot number setting unit is used to newly design the ⁇ 4, 8 ⁇ channel measurement pilot, when the actual number of antenna ports is equal to 4 or 8, the new The designed 4-channel or 8-channel channel measurement pilot implements the downlink channel measurement of the advanced long-term evolution system, and when the actual number of antenna ports is equal to 1 or 2, the channel measurement pilot reuses the common pilot of the LTE system as a channel measurement guide.
  • the frequency is used to implement the downlink channel measurement of the advanced long-term evolution system, wherein the pattern of the four channel measurement pilots and the pattern of the eight channel measurement pilots are the same in the first four ports.
  • the channel measurement pilot patterns of different transmission periods are the same, and the channel measurement pilots are transmitted on the sixth, ninth, and 14th symbols of the configured subframe, and are 0, 2, 5, 10, or 20
  • a digital subframe is a periodic transmission channel measurement pilot
  • the frequency measurement interval of the channel measurement pilot predetermined component unit is P6 repetition is ⁇ 6, 8, 12, 16, 24, 30, 36, 42, 48 ⁇ .
  • the channel measurement pilot transmission system according to the present invention further includes: a repetition transmitting unit configured to make the channel measurement pilot and the newly designed channel measurement pilot with one or two RBs as predetermined constituent units at full bandwidth, etc. The interval is repeatedly transmitted, and the channel measurement pilots of 8 channels are located on the 14th OFDM symbol of the transmission subframe.
  • the present invention may also transmit the predetermined component units by 2 RBs, or 1.5 RBs at intervals, or 2.5 RBs at intervals, or at intervals of 3 RBs. Therefore, with the present invention, the CRS transmission of the LTE system is maintained, the impact on the LTE user is small, and the pilot information required for the high-order MIMO and COMP is provided, which is beneficial for the LTE-Advanced user to improve the quality of the single link. In addition, due to the more sparse design, the performance degradation of LTE users is reduced, and the design overhead is low, which can ensure the performance of channel measurement and improve the throughput of LTE-A system.
  • FIG. 1 shows a common pilot and a downlink dedicated pilot pattern of a normal cyclic prefix frame structure in the LTE standard
  • FIG. 2 shows a channel measurement pilot pattern according to a first embodiment of the present invention
  • 3 shows a channel measurement pilot pattern according to a second embodiment of the present invention
  • FIG. 4 shows a channel measurement pilot pattern according to a third embodiment of the present invention
  • FIG. 5 shows the first embodiment of the present invention.
  • Channel measurement pilot pattern of the fourth embodiment shows a channel measurement pilot pattern according to a fifth embodiment of the present invention
  • FIG. 7 shows a channel measurement pilot pattern according to a sixth embodiment of the present invention
  • Figure 8 shows a channel measurement pilot pattern in a seventh embodiment of the present invention
  • Figure 9 shows a channel measurement pilot pattern in accordance with an eighth embodiment of the present invention
  • Figure 10 shows a first embodiment according to the present invention.
  • the channel measurement pilot pattern of the nine embodiment; and Figure 11 is a block diagram of the channel measurement pilot transmission system according to the present invention. DETAILED DESCRIPTION OF THE INVENTION The present invention will be further described below in conjunction with the drawings and specific embodiments.
  • the invention provides a channel measurement pilot transmission method for an LTE-A system.
  • the capacity is such that CSI-RSs of all antenna ports are transmitted on PDSCH corresponding resources of one subframe or two subframes. Since the CSI-RS needs to provide reference information for resource allocation to the LTE-A system, in order to provide comprehensive scheduling information on the shared resources of the LTE and LTE-Advanced users, the entire bandwidth of the shared resources of the cell is transmitted.
  • the CSI-RS can use any number of antenna ports in the ⁇ 0, 4, 8 ⁇ set.
  • a cell's CSI-RS may use 0 channels (ie, no CSI-RS is transmitted), or 4 channels of CSI-RS, or 8 channels of CSI-RS or four channels of CSI-RS.
  • the correspondence between the public pilot and the actual antenna port is shown in the following table:
  • Rel 8 may use virtual antenna technology, and the user of Rel 10 does not use virtual antenna technology, then CRS cannot be used for CSI-RS.
  • the CRS can be used as a CSI-RS.
  • the same CSI-RS pattern is used in one subframe, and one CSI-RS pattern defined in the standard cannot be switched in different frequency domains or different time slots.
  • the CSI-RS time domain takes N subframes as a period, and N ⁇ 0, 2, 5, 10, 20 ⁇ is transmitted at equal intervals in this period for a period of time.
  • the CSI-RS transmission periods of different cells may be different.
  • each channel measurement pilot is transmitted in one subframe or two adjacent subframes in one transmission period, and each channel measurement pilot is in a predetermined constituent unit. The unit full bandwidth is repeatedly transmitted at equal intervals.
  • the newly designed ⁇ 1 , 2, 4, 8 ⁇ channel channel measurement pilot, the pattern of the 1 channel channel measurement pilot is the same as the pattern of the previous port of the 2 channel channel measurement pilots, and the pattern of the 2 channel channel measurement pilots.
  • the newly designed channel measurement pilot is repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component.
  • the channel measurement pilot of 8 channels is located on the 14th OFDM symbol of the transmission subframe, where 0 channel measurement guide
  • the frequency and one channel measurement pilot are adjacently mapped on the first and second subcarriers, and the two channel measurement pilots and the three channel measurement pilots are adjacently mapped on the fourth and fifth subcarriers, and four channel measurement guides are used.
  • the frequency and 5-channel channel measurement pilots are adjacently mapped on the 7th and 8th subcarriers, and the 6 channel measurement pilots and the 7 channel measurement pilots are adjacently mapped on the 10th and 11th subcarriers. Further, new The designed channel measurement pilot is equally spaced at full bandwidth with two RBs as predetermined components.
  • the multi-transmission, 8-channel channel measurement pilot is located on the 14th OFDM symbol of the transmission subframe, where the 0-channel channel measurement pilot is mapped on the 1st subcarrier, the 9th subcarrier, and the 17th subcarrier, 1 way
  • the channel measurement pilot is mapped on the second subcarrier, the 10th subcarrier, and the 18th subcarrier, and the 2 channel measurement pilots are mapped to the 3rd subcarrier, the 11th subcarrier, and the 19th subcarrier, and the 3 channel measurement guides
  • the frequency is mapped on the 4th subcarrier, the 12th subcarrier and the 20th subcarrier, and the 4 channel measurement pilots are mapped on the 5th subcarrier, the 13th subcarrier and the 21st subcarrier, and the 5 channel measurement pilot mapping
  • 6th subcarrier, the 14th subcarrier, and the 22nd subcarrier 6 channel measurement pilots are mapped to the 7th subcarrier, the 15th subcarrier, and the 23rd
  • the newly designed channel measurement pilots are repeatedly transmitted at equal intervals of full bandwidth with one RB as a predetermined component, and 8 channel measurement pilot bits are used. Transmitting the 11th and 14th OFDM symbols of the subframe, where, on the 11th symbol, the 0 channel measurement pilot and the 1 channel measurement pilot are adjacently mapped on the 1st and 2nd subcarriers, 2
  • the channel channel measurement pilot and the three channel channel measurement pilots are adjacently mapped on the 4th and 5th subcarriers, and the 4 channel channel measurement pilots and the 5 channel channel measurement pilots are adjacently mapped on the 7th and 8th subcarriers, and
  • the 6 channel measurement pilots and the 7 channel measurement pilots are adjacently mapped on the 10th and 11th subcarriers;
  • the 0 channel measurement pilot and the 1 channel measurement pilot on the 14th OFDN symbol are adjacently mapped to the 14th
  • the 2 channel measurement pilots and the 3 channel measurement pilots are adjacently mapped on the 10th and
  • the channel measurement pilot is adjacently mapped on the first and second subcarriers of the 14th symbol, and the 6 channel measurement pilots and the 7 channel measurement pilots are adjacently mapped to the 14th channel. On the 4th and 5th subcarriers of the symbol. Further, the newly designed channel measurement pilot is repeatedly transmitted at equal intervals of the full bandwidth with two RBs as predetermined constituent units, and the channel measurement pilots of the eight channels are located on the 14th OFDM symbol of the transmission subframe, where the 0 channel
  • the measurement pilot is mapped on the third subcarrier, the one channel measurement pilot is mapped on the sixth subcarrier, the two channel measurement pilots are mapped on the ninth subcarrier, and the three channel measurement pilots are mapped on the twelfth subcarrier.
  • the four channel measurement pilots are mapped on the fifteenth subcarrier, the five channel measurement pilots are mapped on the 18th subcarrier, the six channel measurement pilots are mapped on the 21st subcarrier, and the seven channel measurement pilots are used. Mapped on the 24th subcarrier. Further, the newly designed channel measurement pilot is repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component, and the channel measurement pilot of 8 channels is located on the 11th OFDM symbol of the transmission subframe, where 0 channel measurement The pilot and 4-channel channel measurement pilots are mapped on the 1st subcarrier, 1 channel measurement pilot and 5 channel measurement pilots are mapped on the 4th subcarrier, 2 channel measurement pilots and 6 channel measurement guides.
  • the frequency is mapped on the 7th subcarrier, and the 3 channel measurement pilots and the 7 channel measurement pilots are mapped on the 10th subcarrier.
  • the channel measurement pilot is repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component, and the channel measurement pilot channel measurement pilot of the eight channels is located on the sixth OFDM symbol of the transmission subframe, where the channel measurement is zero.
  • the pilot and one channel measurement pilot are adjacently mapped on the first and second subcarriers, and the two channel measurement pilots and the three channel measurement pilots are adjacently mapped on the seventh and eighth subcarriers, and 4, 5 6, 6 or 7 channel measurement pilot frequency i or position and the 0, 1, 2, 3 channel measurement pilot frequency i or position are the same, and each channel measurement pilot is the same in different antenna port configuration, At the same time, it supports the mapping of 1, 2, 4, and 8 channel measurement pilots. Further, the channel measurement pilot is repeatedly transmitted at equal intervals in full bandwidth with one RB as a predetermined component, wherein the channel measurement pilot channel measurement pilots of the 8 channels are located on the 6th and 11th OFDM symbols of the transmission subframe.
  • 0 CSI-RS is mapped on the 1st subcarrier of the 6th OFDM symbol
  • 1 CSI-RS is mapped on the 4th subcarrier of the 6th OFDM symbol
  • 2 CSI-RS is mapped to the 6th OFDM.
  • 3 CSI-RSs are mapped on the 10th subcarrier of the 6th OFDM symbol; 4 CSI-RSs are mapped on the 1st subcarrier of the 11th OFDM symbol, 5 CSI- RS is mapped on the 4th subcarrier of the 11th OFDM symbol, and 6 CSI-RSs are mapped on the 7th subcarrier of the 11th OFDM symbol, and 7 channels of 4 CSI-RS are mapped to the 11th OFDM symbol On the 10th subcarrier.
  • the channel measurement pilot is repeatedly transmitted at equal intervals of the entire bandwidth with one RB as a predetermined component, wherein the channel measurement pilots of the 8 channels are located on the 6th and 11th OFDM symbols of the transmission subframe, and the 0 channel CSI -RS and one CSI-RS are adjacently mapped on the first and second subcarriers of the sixth OFDM symbol, and two CSI-RSs and three CSI-RSs are adjacently mapped to the seventh of the sixth OFDM symbol.
  • On the 8 subcarriers 4, 5, 6, and 7 are mapped to the eleventh symbol, and their frequency domain positions are the same as 0, 1, 2, and 3, respectively.
  • the channel measurement pilot is repeatedly transmitted at equal intervals of the entire bandwidth with one RB as a predetermined component, wherein the channel measurement pilots of the 8 channels are located on the 6th and 11th OFDM symbols of the transmission subframe, and the 0 channel CSI -RS and one CSI-RS are adjacently mapped on the first and second subcarriers of the sixth OFDM symbol, and two CSI-RSs and three CSI-RSs are adjacently mapped to the seventh of the sixth OFDM symbol.
  • 4 5, 6, and 7 channels are mapped to the 14th symbol, and their frequency domain positions are the same as 0, 1, 2, and 3 channels, respectively.
  • Embodiment 1 is a common pilot and downlink dedicated pilot pattern according to the LTE standard normal cyclic prefix frame structure, which should be avoided when channel measurement pilot mapping, and FIG. 2 to FIG. 10 are channels according to an embodiment of the present invention.
  • the pilot pattern is measured.
  • Embodiment 1 When the actual number of antenna ports is equal to 4, 8, a new designed 4-channel or 8-channel channel measurement pilot is used to implement downlink channel measurement of the LTE-A system. When the actual number of antenna ports is equal to 1, 2, the channel measurement pilot reuses LTE.
  • the common pilot of the system acts as a channel measurement pilot to implement downlink channel measurement of the LTE-A system.
  • the four-channel CSI-RS pattern is the same as the first four ports of the eight-way CSI-RS pattern.
  • the newly designed CSI-RS repeatedly transmits the pattern shown in Figure 2 in a certain period, and the newly designed CSI-RS occupies one subframe transmission in each cycle.
  • the pilot frequency domain interval of each antenna port of the newly designed CSI-RS is 12 subcarriers, and the pattern shown in FIG. 2 is repeated for each RB of the full bandwidth of the CSI-RS transmission subframe.
  • the newly designed CSI-RS mapping is sent on the 14th symbol of each subframe.
  • 0 CSI-RS and 1 CSI-RS are adjacently mapped on the 1st and 2nd subcarriers
  • 2 CSI-RS and 3 CSI-RS are adjacently mapped on the 4th, 5th subcarriers
  • 4 CSI- RS and 5 CSI-RS are adjacently mapped on the 7th and 8th subcarriers
  • 6 CSI-RSs and 7 CSI-RSs are adjacently mapped to the first 10, 11 subcarriers.
  • Embodiment 2 When the actual number of antenna ports is equal to 4, 8, a new designed 4-channel or 8-channel channel measurement pilot is used to implement downlink channel measurement of the LTE-A system. When the actual number of antenna ports is equal to 1, 2, the channel measurement pilot reuses LTE.
  • the common pilot of the system acts as a channel measurement pilot to implement downlink channel measurement of the LTE-A system.
  • the four-channel CSI-RS pattern is the same as the first four ports of the eight-way CSI-RS pattern.
  • the newly designed 4-channel or 8-channel CSI-RS repeatedly transmits the pattern shown in Figure 3 in a certain period, and the newly designed CSI-RS occupies one subframe transmission in each cycle.
  • the newly designed CSI-RS has a pilot frequency domain interval of 8 subcarriers per antenna port, and the pattern shown in Fig. 3 is repeated every two RBs of the full bandwidth of the CSI-RS transmission subframe.
  • the newly designed CSI-RS mapping is sent on the 14th symbol of each subframe.
  • the 0-channel CSI-RS is mapped on the 1st subcarrier, the 9th subcarrier and the 17th subcarrier, and one CSI-RS is mapped on the 2nd subcarrier, the 10th subcarrier and the 18th subcarrier, and 2 CSI-
  • the RS is mapped to the 3rd subcarrier, the 11th subcarrier and the 19th subcarrier, the 3 CSI-RSs are mapped to the 4th subcarrier, the 12th subcarrier and the 20th subcarrier, and the 4 CSI-RSs are mapped to the 5th.
  • the 5 CSI-RSs are mapped on the 6th subcarrier, the 14th subcarrier and the 22nd subcarrier, and the 6 CSI-RSs are mapped to the 7th subcarrier, 15 subcarriers and 23rd subcarrier, 7 CSI-RS CSI-RSs are mapped on the 8th subcarrier, the 16th subcarrier and the 24th subcarrier.
  • Embodiment 3 When the actual number of antenna ports is equal to 4, 8, the newly designed 4-channel or 8-channel channel measurement pilots implement downlink channel measurement of the LTE-A system. When the actual number of antenna ports is equal to 1, 2, the channel measurement pilot reuses LTE.
  • the common pilot of the system acts as a channel measurement pilot to implement downlink channel measurement of the LTE-A system.
  • the four-channel CSI-RS pattern is the same as the first four ports of the eight-way CSI-RS pattern.
  • the newly designed 4-channel or 8-channel CSI-RS repeatedly transmits the pattern shown in Figure 4 in a certain period, and the newly designed CSI-RS occupies one subframe transmission in each cycle.
  • the newly designed CSI-RS has a pilot frequency domain interval of 6 subcarriers per antenna port, and the pattern shown in FIG. 4 is repeated for each RB of the full bandwidth of the CSI-RS transmission subframe.
  • the newly designed CSI-RS mapping is sent on the 11th and 14th symbols of each subframe.
  • 0-channel CSI-RS and 1-channel CSI-RS are adjacently mapped on the 1st and 2nd subcarriers of the 11th symbol, and 2 CSI-RSs and 3 CSI-RSs are adjacently mapped to the 4th of the 11th symbol.
  • 4 CSI-RSs and 5 CSI-RSs are adjacently mapped to the 7th and 8th subcarriers of the 11th symbol, and 6 CSI-RSs and 7 CSI-RSs are adjacently mapped to the 10th, 11th subcarriers of 11 symbols; or 0 CSI-RS and 1 CSI-RS are adjacently mapped to the 7th, 8th subcarriers of the 14th symbol, 2 CSI-RS and 3 CSI -RS neighbors are mapped on the 10th, 11th subcarriers of the 14th symbol, 4 CSI-RSs and 5 CSI-RSs are adjacently mapped to the 1st and 2nd subcarriers of the 14th symbol, 6 CSIs
  • the -RS and 7-way CSI-RS are adjacently mapped on the 4th, 5th subcarriers of the 14th symbol.
  • Embodiment 4 When the actual number of antenna ports is equal to 4, 8, a new designed 4-channel or 8-channel channel measurement pilot is used to implement downlink channel measurement of the LTE-A system.
  • the channel measurement pilot reuses LTE.
  • the common pilot of the system acts as a channel measurement pilot to implement downlink channel measurement of the LTE-A system.
  • the four-way CSI-RS pattern is the same as the first four ports of the eight-way CSI-RS pattern.
  • the newly designed 4-channel or 8-channel CSI-RS repeatedly transmits the pattern shown in Figure 5 in a certain period, and the newly designed CSI-RS occupies one subframe transmission in each cycle.
  • the pilot frequency domain interval of each antenna port of the newly designed CSI-RS is 24 subcarriers, and the pattern shown in Fig. 5 is repeated every two RBs of the full bandwidth of the CSI-RS transmission subframe.
  • the newly designed CSI-RS mapping is sent on the 14th symbol of each subframe.
  • 0 CSI-RS is mapped on the 3rd subcarrier
  • 1 CSI-RS is mapped on the 6th subcarrier
  • 2 CSI-RS is mapped to the 9th subcarrier
  • 3 CSI-RS is mapped on the 12th subcarrier.
  • 4 CSI-RSs are mapped on the 15th subcarrier
  • 5 CSI-RSs are mapped on the 18th subcarrier
  • 6 CSI-RSs are mapped to the 21st subcarrier
  • 7 CSI-RSs are mapped to the 24th subcarrier. on.
  • Embodiment 5 When the actual number of antenna ports is equal to 4, 8, the newly designed 4-channel or 8-channel channel measurement pilot is implemented.
  • the downlink channel measurement of the LTE-A system when the actual number of antenna ports is equal to 1, 2, the channel measurement pilot reuses the common pilot of the LTE system as the channel measurement pilot to implement the downlink channel measurement of the LTE-A system.
  • the four-channel CSI-RS pattern is the same as the first four ports of the eight-way CSI-RS pattern.
  • the newly designed 4-channel or 8-channel CSI-RS repeatedly transmits the pattern shown in Figure 6 in a certain period, and the newly designed CSI-RS occupies one subframe transmission in each cycle.
  • the pilot frequency domain interval of each antenna port of the newly designed CSI-RS is 12 subcarriers, and the pattern shown in FIG. 6 is repeated for each RB of the full bandwidth of the CSI-RS transmission subframe.
  • the newly designed CSI-RS mapping is sent on the 11th symbol of each subframe.
  • 0 CSI-RS and 1 CSI-RS are adjacently mapped on the 1st and 2nd subcarriers
  • 2 CSI-RS and 3 CSI-RS are adjacently mapped on the 4th, 5th subcarriers
  • the RS and the 5 CSI-RSs are adjacently mapped on the 7th, 8th subcarriers
  • the 6 CSI-RSs and the 7 CSI-RSs are adjacently mapped on the 10th and 11th subcarriers.
  • Example 6 New design ⁇ 1, 2, 4, 8 ⁇ CSI-RS, 4-way CSI-RS pattern and 8-channel CSI-RS pattern
  • the first four ports have the same pattern.
  • the 1 CSI-RS pattern is the same as the 2 CSI-RS previous port, the 2 CSI-RS pattern and the 4 CSI-RS first 2 ports are the same, 4 CSI-RS patterns and 8 CSI- The patterns of the first 4 ports of the RS are the same.
  • the CSI-RS repeatedly transmits the pattern shown in Figure 7 in a certain period, and the newly designed CSI-RS occupies one subframe transmission in each cycle.
  • the pilot frequency domain interval of each antenna port of the newly designed CSI-RS is 12 subcarriers, and the pattern shown in Fig. 7 is repeated for each RB of the full bandwidth of the CSI-RS transmission subframe.
  • the newly designed CSI-RS mapping is sent on the sixth symbol of each subframe.
  • 0 CSI-RS and 1 CSI-RS are adjacently mapped on the 1st and 2nd subcarriers
  • 2 CSI-RS and 3 CSI-RS are adjacently mapped on the 4th, 5th subcarriers
  • the RS and the 5 CSI-RSs are adjacently mapped on the 7th, 8th subcarriers
  • the 6 CSI-RSs and the 7 CSI-RSs are adjacently mapped on the 10th and 11th subcarriers.
  • Embodiment 7 When the actual number of antenna ports is equal to 4, 8, the newly designed 4-channel or 8-channel channel measurement pilot is implemented.
  • the four-channel CSI-RS pattern is the same as the first four ports of the eight-way CSI-RS pattern.
  • the newly designed 4-channel or 8-channel CSI-RS repeatedly transmits the pattern shown in Figure 8 in a certain period, and the newly designed CSI-RS occupies one subframe transmission in each cycle.
  • the pilot frequency domain interval of each antenna port of the newly designed CSI-RS is 12 subcarriers, and the pattern shown in FIG. 6 is repeated for each RB of the full bandwidth of the CSI-RS transmission subframe.
  • the newly designed CSI-RS 0-3 way map is sent on the 6th symbol of each subframe; the 4-7 way map is sent on the 11th symbol of each subframe.
  • Embodiment 8 When the actual number of antenna ports is equal to 4, 8, a new designed 4-channel or 8-channel channel measurement pilot is used to implement downlink channel measurement of the LTE-A system. When the actual number of antenna ports is equal to 1, 2, the channel measurement pilot reuses LTE. The common pilot of the system acts as a channel measurement pilot to implement downlink channel measurement of the LTE-A system.
  • the four-way CSI-RS pattern is the same as the first four ports of the eight-way CSI-RS pattern.
  • the newly designed 4-channel or 8-channel CSI-RS repeatedly transmits the pattern shown in Figure 9 in a certain period, and the newly designed CSI-RS occupies one subframe transmission in each cycle.
  • the pilot frequency domain interval of each antenna port of the newly designed CSI-RS is 12 subcarriers, and the pattern shown in Fig. 6 is repeated for each RB of the full bandwidth of the CSI-RS transmission subframe.
  • the newly designed CSI-RS 0-3 way map is sent on the 6th symbol of each subframe; 4-7 lines are sent on the 11th symbol of each subframe.
  • 0-channel CSI-RS and 1-channel CSI-RS are adjacently mapped on the 1st and 2nd subcarriers, and 2 CSI-RSs and 3 CSI-RSs are adjacently mapped on the 7th, 8th subcarriers 4, 5, 6
  • the frequency domain positions of the 7-channel are the same as the 0, 1, 2, and 3 channels, respectively.
  • Embodiment 9 When the actual number of antenna ports is equal to 4, 8, the newly designed 4-channel or 8-channel channel measurement pilots implement downlink channel measurement of the LTE-A system, and when the actual number of antenna ports is equal to 1, 2, the channel measurement pilot is used.
  • the common pilot of the LTE system is reused as a channel measurement pilot to implement downlink channel measurement of the LTE-A system.
  • the four-channel CSI-RS pattern is the same as the first four ports of the eight-way CSI-RS pattern.
  • the newly designed 4-channel or 8-channel CSI-RS repeatedly transmits the pattern shown in Figure 10 in a certain period, and the newly designed CSI-RS occupies one subframe transmission in each cycle.
  • the pilot frequency domain interval of each antenna port of the newly designed CSI-RS is 12 subcarriers.
  • the pattern shown in Fig. 6 is repeated for each RB of the full bandwidth of the CSI-RS transmission subframe.
  • the newly designed CSI-RS 0-3 way map is sent on the 6th symbol of each subframe; the 4-7 way map is sent on the 14th symbol of each subframe.
  • FIG. 11 is a block diagram of a channel measurement pilot transmission system 1100 in accordance with the present invention. As shown in FIG. 11, the system includes: a sending module 1102, configured to send each channel measurement pilot in one subframe or two adjacent subframes in one transmission period, and complete in units of predetermined constituent units. Each channel measurement pilot is repeatedly transmitted at equal intervals of bandwidth.
  • the sending module 1102 may include: a first channel measurement pilot path setting unit 1102a, configured to newly design a ⁇ 1, 2, 4, 8 ⁇ channel channel measurement pilot, where a channel measurement pilot pattern and The pattern of the previous port of the 2-channel channel measurement pilot is the same, the pattern of the 2-channel channel measurement pilot is the same as the pattern of the first 2 ports of the 4-channel channel measurement pilot, and the pattern of the 4-channel channel measurement pilot and the 8 channel.
  • a first channel measurement pilot path setting unit 1102a configured to newly design a ⁇ 1, 2, 4, 8 ⁇ channel channel measurement pilot, where a channel measurement pilot pattern and The pattern of the previous port of the 2-channel channel measurement pilot is the same, the pattern of the 2-channel channel measurement pilot is the same as the pattern of the first 2 ports of the 4-channel channel measurement pilot, and the pattern of the 4-channel channel measurement pilot and the 8 channel.
  • the first four ports of the channel measurement pilot have the same pattern; and the second channel measurement pilot number setting unit 1102b is used to newly design the ⁇ 4, 8 ⁇ channel measurement pilot, when the actual number of antenna ports is equal to 4 or 8
  • the channel measurement pilot reuses the common pilot of the LTE system as The channel measures the pilot to implement the downlink channel measurement of the advanced long-term evolution system, wherein the pattern of the 4-channel channel measurement pilot and the pattern of the 8-channel channel measurement pilot are the same in the first four ports.
  • the channel measurement pilot patterns of different transmission periods are the same, and the channel measurement pilots are transmitted on the sixth, ninth, and 14th symbols of the configured subframe, to 0, 2, 5, 10, or 20
  • the subframe of any one of the numbers periodically transmits the channel measurement pilot, and the channel measurement pilot is predetermined to be a unit of P ⁇ repeated frequency domain P ⁇ is ⁇ 6, 8, 12, 16, 24, 30, 36, 42, 48 ⁇
  • the channel measurement pilot transmission system according to the present invention may further include: a repetition transmitting unit 1104, configured to make the channel measurement pilot and the newly designed channel measurement pilot with one or two RBs as predetermined constituent units.
  • the transmission is repeated at equal intervals of full bandwidth, and the channel measurement pilots of 8 channels are located on the 14th OFDM symbol of the transmission subframe.
  • the above invention transmits the predetermined constituent unit to each RB, it should be understood that the present invention can also be applied to spacing a predetermined constituent unit by 2 RBs, or by 1.5 RBs, or by 2.5 RBs, or by 3 RBs.
  • Full bandwidth is sent at equal intervals.
  • the above-described transmission method 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, optionally 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, or they may be fabricated into individual integrated circuit modules, or multiple modules thereof or The steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the present invention maintains CRS transmission in the LTE system, has a small impact on LTE users, and provides pilot information required for high-order MIMO and COMP, which is beneficial for LTE-Advanced users to improve single-link quality.

Description

信道测量导频发送方法和系统 技术领域 本发明涉及无线通信系统， 具体地说， 尤其适用于 LTE-A中对 LTE和 LTE-Advanced用户共用资源上的信道测量导频发送方法和系统。 背景技术 为了提高小区的吞吐量，进行小区间的千^ L协调，新一代无线通信系统， 如高级长期演进系统 ( Long-Term Evolution advance , 简称为 LTE- Advance ) , 高级国际无线通信系统 ( International Mobile Telecommunication advance , 简 称为 IMT-Advance )等都引入网络级间的协作传输技术（ Coordinate Multipoint Transmission and Reception, 以下简称为 COMP )。 在 3GPP LTE56次会议中已定义了 LTE-Advanced的两种导频： 信道测 量导频 （以下简称为 CSI-RS ) 和解调导频 （以下简称为 DMRS ), 其中明确 解调导频是小区专用（cell-specific ), 相对于解调导频在时频资源上分布更加 稀疏。 然而， 信道测量导频在 LTE-A 系统中如何工作， 它的映射规则未详细 定义。 发明内容 本发明的主要目的在于提出一种具体的信道测量导频设计方案，以解决 上述问题至少之一。 才艮据本发明的一个方面， 提供了一种信道测量导频发送方法， 在一个发 送周期内， 每路信道测量导频以一个子帧或相邻的两个子帧发送， 并且每路 信道测量导频按预定组成单元为单位全带宽等间隔重复发送。 其中， 新设计 { 1 , 2 , 4 , 8}路信道测量导频， 1路信道测量导频的图样 和 2路信道测量导频的前一个端口的图样相同， 2路信道测量导频的图样和 4路信道测量导频的前 2个端口的图样相同， 以及信道测量导频预定组成单 元等间隔重复的频域间隔为 {6, 8, 12, 16, 24,30,36,42,48}„ 新设计的信道测量导频以一个 RB为预定组成单元在全带宽等间隔重复 发送， 8路的信道测量导频位于发送子帧的第 14个 OFDM符号上， 其中， 0 路信道测量导频和 1路信道测量导频相邻映射于第 1、 2个子载波上， 2路信 道测量导频和 3路信道测量导频相邻映射于第 4、 5个子载波上， 4路信道测 量导频和 5路信道测量导频相邻映射于第 7、 8个子载波上， 以及 6路信道 测量导频和 7路信道测量导频相邻映射于第 10、 11个子载波上。 进一步地，新设计的信道测量导频以两个 RB为预定组成单元在全带宽 等间隔重复发送， 8路的信道测量导频位于发送子帧的第 14个 OFDM符号 上， 其中， 0路信道测量导频映射于第 1个子载波、 第 9个子载波和第 17个 子载波上， 1路信道测量导频映射于第 2个子载波、 第 10个子载波和第 18 个子载波上， 2路信道测量导频映射于第 3个子载波、第 11个子载波和第 19 个子载波， 3路信道测量导频映射于第 4个子载波、 第 12个子载波和第 20 个子载波上， 4路信道测量导频映射于第 5个子载波、 第 13 个子载波和第 21个子载波上， 5路信道测量导频映射于第 6个子载波、 第 14个子载波和 第 22个子载波上， 6路信道测量导频映射于第 7个子载波、 第 15个子载波 和第 23个子载波， 以及 7路信道测量导频映射于第 8个子载波、 第 16个子 载波和第 24个子载波上。 进一步地，新设计的信道测量导频以一个 RB为预定组成单元在全带宽 等间隔重复发送， 8路的信道测量导频位于发送子帧的第 11 个和第 14 个 OFDM符号上， 其中， 在第 11个符号上， 0路信道测量导频和 1路信道测量 导频相邻映射于第 1、 2个子载波上， 2路信道测量导频和 3路信道测量导频 相邻映射于第 4、 5个子载波上， 4路信道测量导频和 5路信道测量导频相邻 映射于第 7、 8个子载波上， 以及 6路信道测量导频和 7路信道测量导频相 邻映射于第 10、 11个子载波上； 第 14个 OFDN符号上 0路信道测量导频和 1路信道测量导频相邻映射于第 14个符号的第 7、 8个子载波上， 2路信道 测量导频和 3路信道测量导频相邻映射于第 14个符号的第 10、 11个子载波 上， 4路信道测量导频和 5路信道测量导频相邻映射于第 14个符号的第 1、 2个子载波上， 以及 6路信道测量导频和 7路信道测量导频相邻映射于第 14 个符号的第 4、 5个子载波上。 进一步地，新设计的信道测量导频以两个 RB为预定组成单元在全带宽 等间隔重复发送， 8路的信道测量导频位于发送子帧的第 14个 OFDM符号 上， 其中， 0路信道测量导频映射于第 3个子载波上， 1路信道测量导频映 射于第 6个子载波上， 2路信道测量导频映射于第 9个子载波， 3路信道测 量导频 映射于第 12个子载波上， 4路信道测量导频映射于第 15个子载波上， 5路信道测量导频映射于第 18 个子载波上， 6路信道测量导频映射于第 21 个子载波， 以及 7路信道测量导频映射于第 24个子载波上。 进一步地，新设计的信道测量导频以一个 RB为预定组成单元在全带宽 等间隔重复发送， 8路的信道测量导频位于发送子帧的第 11个 OFDM符号 上， 其中， 0路信道测量导频和 4路信道测量导频映射于第 1个子载波上， 1 路信道测量导频和 5路信道测量导频映射于第 4个子载波上， 2路信道测量 导频和 6路信道测量导频映射于第 7个子载波上， 以及 3路信道测量导频和 7路信道测量导频映射于第 10个子载波上。 此外，信道测量导频以一个 RB为预定组成单元在全带宽等间隔重复发 送， 8路信的信道测量导频道测量导频位于发送子帧的第 6个 OFDM符号上， 其中 , 0路信道测量导频和 1路信道测量导频相邻映射于第 1 , 2个子载波上， 2路信道测量导频和 3路信道测量导频相邻映射于第 7、 8个子载波上， 以及 4、 5、 6、 7路信道测量导频的频 i或位置分别和 0、 1、 2、 3路信道测量导频 的频 i或位置相同， 并且每路信道测量导频在不同天线端口配置时 相同， 并 且同时支持 1、 2、 4、 8路信道测量导频的映射。 进一步地，信道测量导频以一个 RB为预定组成单元在全带宽等间隔重 复发送， 其中， 8路的信道测量导频信道测量导频位于发送子帧的第 6个和 第 11个 OFDM符号上， 0路 CSI-RS映射于第 6个 OFDM符号的第 1个子 载波上， 1路 CSI-RS 映射于第 6个 OFDM符号的第 4个子载波上， 2路 CSI-RS 映射于第 6个 OFDM符号的第 7个子载波上， 3路 CSI-RS映射于第 6个 OFDM 符号的第 10个子载波上； 4路 CSI-RS 映射于第 11个 OFDM符号的第 1个 子载波上， 5路 CSI-RS 映射于第 11个 OFDM符号的第 4个子载波上， 和 6路 CSI-RS 映射于第 11个 OFDM符号的第 7个子载波上，和 7路 4路 CSI-RS 映射于第 11个 OFDM符号的第 10个子载波上。 进一步地，信道测量导频以一个 RB为预定组成单元在全带宽等间隔重 复发送， 其中， 8路的信道测量导频位于发送子帧的第 6个和第 11个 OFDM 符号上， 0路 CSI-RS和 1路 CSI-RS相邻映射于第 6个 OFDM符号的第 1、 2个子载波上， 2路 CSI-RS和 3路 CSI-RS相邻映射于第 6个 OFDM符号的 第 7、 8个子载波上， 4、 5、 6、 7路映射于第 11个符号， 其频域位置分别和 0、 1、 2、 3路相同。 进一步地，信道测量导频以一个 RB为预定组成单元在全带宽等间隔重 复发送， 其中， 8路信道测量导频位于发送子帧的第 6个和第 11 个 OFDM 符号上， 0路 CSI-RS和 1路 CSI-RS相邻映射于第 6个 OFDM符号的第 1、 2个子载波上， 2路 CSI-RS和 3路 CSI-RS相邻映射于第 6个 OFDM符号的 第 7、 8个子载波上， 4、 5、 6、 7路映射于第 14个符号， 其频域位置分别和 0、 1、 2、 3路相同。 根据本发明的另一方面， 还提供了一种信道测量导频发送系统， 包括： 发送模块， 用于在一个发送周期内， 使每路信道测量导频在一个子帧或相邻 的两个子帧发送， 并且按预定组成单元为单位全带宽等间隔重复发送每路信 道测量导频。 其中， 发送模块可以包括： 第一信道测量导频路数设置单元， 用于新设 计 { 1 , 2, 4, 8}路信道测量导频， 其中， 1路信道测量导频的图样和 2路信 道测量导频的前一个端口的图样相同， 2路信道测量导频的图样和 4路信道 测量导频的前 2个端口的图样相同， 以及 4路信道测量导频的图样和 8路信 道测量导频的前 4个端口的图样相同；以及第二信道测量导频路数设置单元， 用于新设计 {4, 8}路信道测量导频， 当实际天线端口数等于 4或 8时， 新设 计的 4路或 8路信道测量导频实现了高级长期演进系统的下行信道测量， 以 及当实际天线端口数等于 1或 2时，信道测量导频重用 LTE系统的公共导频， 作为信道测量导频， 以实现高级长期演进系统的下行信道测量， 其中， 4 路 信道测量导频的图样和 8路信道测量导频的图样在前 4个端口的图样相同。 在本发明中， 不同发送周期的信道测量导频图样相同， 信道测量导频在 所配置的子帧的第 6、 9、 14个符号上发送， 以 0、 2、 5、 10或 20中任一个 数字的子帧为周期发送信道测量导频， 并且信道测量导频预定组成单元等间 P鬲重复的频域间隔为 {6, 8, 12, 16, 24,30,36,42,48}。 另外， 才艮据本发明的信道测量导频发送系统还包括： 重复发送单元， 用 于使信道测量导频和新设计的信道测量导频以一个或两个 RB为预定组成单 元在全带宽等间隔重复发送， 8 路的信道测量导频位于发送子帧的第 14 个 OFDM符号上。 应了解， 本发明也可以将预定组成单元间隔 2个 RB, 或者间隔 1.5个 RB , 或者间隔 2.5个 RB , 或者间隔 3个 RB全货款等间隔发送。 因此，通过本发明，保持了 LTE系统 CRS发送，对 LTE用户影响艮小， 并且提供了高阶 MIMO和 COMP所需的导频信息，有利于 LTE- Advanced用 户提高单链路质量。 另外， 由于釆用了更为稀疏的设计， 降低了对 LTE用户 的性能降级， 而且设计开销低， 可以保证信道测量的性能， 能提高 LTE-A系 统吞吐量。 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 示出了 LTE标准中的正常循环前缀帧结构的公共导频和下行专用 导频图样； 图 2示出了根据本发明的第一实施例的信道测量导频图样； 图 3示出了 居本发明的第二实施例的信道测量导频图样； 图 4示出了根据本发明的第三实施例的信道测量导频图样； 图 5示出了 居本发明的第四实施例的信道测量导频图样； 图 6示出了根据本发明的第五实施例的信道测量导频图样； 图 7示出了根据本发明的第六实施例的信道测量导频图样； 图 8示出了 居本发明的第七实施例的信道测量导频图样； 图 9示出了根据本发明的第八实施例的信道测量导频图样； 图 10示出了根据本发明的第九实施例的信道测量导频图样； 以及 图 11是才艮据本发明的信道测量导频发送系统的框图。 具体实施方式 下面结合附图和具体实施方式对本发明作进一步的说明。 本发明提出一种 LTE-A 系统信道测量导频发送方法。 本发明的具体内 容是使所有天线端口的 CSI-RS在一个子帧或者两个子帧的 PDSCH对应资源 上发送。 因为 CSI-RS需要给 LTE-A系统提供资源分配的参考信息，所以为了在 LTE和 LTE-Advanced用户共用资源上提供全面的调度信息， 在该小区的共 用资源上全带宽上发送。 另外， CSI-RS可以釆用 {0, 4, 8}集合中任意数目的天线端口个数。 例如，一个小区的 CSI-RS可以釆用 0路（即不发送 CSI-RS ),或者 4路 CSI-RS , 或者 8路 CSI-RS或者四路 CSI-RS。 和公共导频以及实际天线端口的对应关 系如下表所示：
Figure imgf000008_0001
其中， 当 CRS天线端口数小于实际天线端口， Rel 8可能使用了虚拟天 线技术， 而 Rel 10的用户不釆用虚拟天线技术， 则 CRS不能用于 CSI-RS。 当 CRS天线端口数等于实际天线端口， 则 CRS可以作为 CSI-RS。 在一个子帧内釆用同一种 CSI-RS 图样， 对于标准中定义的某一种 CSI-RS图样不能在不同频域或者不同时隙的切换。 CSI-RS时域以 N个子帧 为周期，， N {0, 2, 5 , 10, 20} , 在一段时间内按照此周期等间隔发送。 不同小区的 CSI-RS发送周期可以不同。 应注意， 当 N=0时， CSI-RS每个子帧都发送。 每个用户接收本小区的 CSI-RS , 为了支持 COMP所需要的信道测量， COMP用户也可以接收其他小区的 CSI-RS。 才艮据本发明的信道测量导频发送方法， 在一个发送周期内， 每路信道测 量导频以一个子帧或相邻的两个子帧发送， 并且每路信道测量导频按预定组 成单元为单位全带宽等间隔重复发送。 其中， 新设计 { 1 , 2, 4, 8}路信道测量导频， 1路信道测量导频的图样 和 2路信道测量导频的前一个端口的图样相同， 2路信道测量导频的图样和 4路信道测量导频的前 2个端口的图样相同， 以及信道测量导频预定组成单 元等间隔重复的频域间隔为 {6, 8, 12, 16, 24,30,36,42,48}„ 新设计的信道测量导频以一个 RB为预定组成单元在全带宽等间隔重复 发送， 8路的信道测量导频位于发送子帧的第 14个 OFDM符号上， 其中， 0 路信道测量导频和 1路信道测量导频相邻映射于第 1、 2个子载波上， 2路信 道测量导频和 3路信道测量导频相邻映射于第 4、 5个子载波上， 4路信道测 量导频和 5路信道测量导频相邻映射于第 7、 8个子载波上， 以及 6路信道 测量导频和 7路信道测量导频相邻映射于第 10、 11个子载波上。 进一步地，新设计的信道测量导频以两个 RB为预定组成单元在全带宽 等间隔重复发送， 8路的信道测量导频位于发送子帧的第 14个 OFDM符号 上， 其中， 0路信道测量导频映射于第 1个子载波、 第 9个子载波和第 17个 子载波上， 1路信道测量导频映射于第 2个子载波、 第 10个子载波和第 18 个子载波上， 2路信道测量导频映射于第 3个子载波、第 11个子载波和第 19 个子载波， 3路信道测量导频映射于第 4个子载波、 第 12个子载波和第 20 个子载波上， 4路信道测量导频映射于第 5个子载波、 第 13 个子载波和第 21个子载波上， 5路信道测量导频映射于第 6个子载波、 第 14个子载波和 第 22个子载波上， 6路信道测量导频映射于第 7个子载波、 第 15个子载波 和第 23个子载波， 以及 7路信道测量导频映射于第 8个子载波、 第 16个子 载波和第 24个子载波上。 进一步地，新设计的信道测量导频以一个 RB为预定组成单元在全带宽 等间隔重复发送， 8路的信道测量导频位于发送子帧的第 11 个和第 14 个 OFDM符号上， 其中， 在第 11个符号上， 0路信道测量导频和 1路信道测量 导频相邻映射于第 1、 2个子载波上， 2路信道测量导频和 3路信道测量导频 相邻映射于第 4、 5个子载波上， 4路信道测量导频和 5路信道测量导频相邻 映射于第 7、 8个子载波上， 以及 6路信道测量导频和 7路信道测量导频相 邻映射于第 10、 11个子载波上； 第 14个 OFDN符号上 0路信道测量导频和 1路信道测量导频相邻映射于第 14个符号的第 7、 8个子载波上， 2路信道 测量导频和 3路信道测量导频相邻映射于第 14个符号的第 10、 11个子载波 上， 4路信道测量导频和 5路信道测量导频相邻映射于第 14个符号的第 1、 2个子载波上， 以及 6路信道测量导频和 7路信道测量导频相邻映射于第 14 个符号的第 4、 5个子载波上。 进一步地，新设计的信道测量导频以两个 RB为预定组成单元在全带宽 等间隔重复发送， 8路的信道测量导频位于发送子帧的第 14个 OFDM符号 上， 其中， 0路信道测量导频映射于第 3个子载波上， 1路信道测量导频映 射于第 6个子载波上， 2路信道测量导频映射于第 9个子载波， 3路信道测 量导频 映射于第 12个子载波上， 4路信道测量导频映射于第 15个子载波上， 5路信道测量导频映射于第 18 个子载波上， 6路信道测量导频映射于第 21 个子载波， 以及 7路信道测量导频映射于第 24个子载波上。 进一步地，新设计的信道测量导频以一个 RB为预定组成单元在全带宽 等间隔重复发送， 8路的信道测量导频位于发送子帧的第 11个 OFDM符号 上， 其中， 0路信道测量导频和 4路信道测量导频映射于第 1个子载波上， 1 路信道测量导频和 5路信道测量导频映射于第 4个子载波上， 2路信道测量 导频和 6路信道测量导频映射于第 7个子载波上， 以及 3路信道测量导频和 7路信道测量导频映射于第 10个子载波上。 此外，信道测量导频以一个 RB为预定组成单元在全带宽等间隔重复发 送， 8路的信道测量导频信道测量导频位于发送子帧的第 6个 OFDM符号上， 其中 , 0路信道测量导频和 1路信道测量导频相邻映射于第 1 , 2个子载波上， 2路信道测量导频和 3路信道测量导频相邻映射于第 7、 8个子载波上， 以及 4、 5、 6、 7路信道测量导频的频 i或位置分别和 0、 1、 2、 3路信道测量导频 的频 i或位置相同， 并且每路信道测量导频在不同天线端口配置时 相同， 并 且同时支持 1、 2、 4、 8路信道测量导频的映射。 进一步地，信道测量导频以一个 RB为预定组成单元在全带宽等间隔重 复发送， 其中， 8路的信道测量导频信道测量导频位于发送子帧的第 6个和 第 11个 OFDM符号上， 0路 CSI-RS映射于第 6个 OFDM符号的第 1个子 载波上，1路 CSI-RS 映射于第 6个 OFDM符号的第 4个子载波上， 2路 CSI-RS 映射于第 6个 OFDM符号的第 7个子载波上， 3路 CSI-RS映射于第 6个 OFDM 符号的第 10个子载波上； 4路 CSI-RS 映射于第 11个 OFDM符号的第 1个 子载波上， 5路 CSI-RS 映射于第 11个 OFDM符号的第 4个子载波上， 和 6路 CSI-RS 映射于第 11个 OFDM符号的第 7个子载波上，和 7路 4路 CSI-RS 映射于第 11个 OFDM符号的第 10个子载波上。 进一步地，信道测量导频以一个 RB为预定组成单元在全带宽等间隔重 复发送， 其中， 8路的信道测量导频位于发送子帧的第 6个和第 11个 OFDM 符号上， 0路 CSI-RS和 1路 CSI-RS相邻映射于第 6个 OFDM符号的第 1、 2个子载波上， 2路 CSI-RS和 3路 CSI-RS相邻映射于第 6个 OFDM符号的 第 7、 8个子载波上， 4、 5、 6、 7路映射于第 11个符号， 其频域位置分别和 0、 1、 2、 3路相同。 进一步地，信道测量导频以一个 RB为预定组成单元在全带宽等间隔重 复发送， 其中， 8路的信道测量导频位于发送子帧的第 6个和第 11个 OFDM 符号上， 0路 CSI-RS和 1路 CSI-RS相邻映射于第 6个 OFDM符号的第 1、 2个子载波上， 2路 CSI-RS和 3路 CSI-RS相邻映射于第 6个 OFDM符号的 第 7、 8个子载波上， 4、 5、 6、 7路映射于第 14个符号， 其频域位置分别和 0、 1、 2、 3路相同。 图 1是才艮据 LTE标准正常循环前缀帧结构的公共导频和下行专用导频 图样， 信道测量导频映射时应该避开这些位置， 以及图 2至图 10是根据本 发明实施例的信道测量导频图样。 以下将结合附图， 以具体实施例的方式对 本发明的技术方案加以说明。 实施例一 当实际天线端口数等于 4, 8 时新设计 4路或 8路信道测量导频实现 LTE-A 系统的下行信道测量， 当实际天线端口数等于 1 , 2 时信道测量导频 重用 LTE 系统的公共导频作为信道测量导频实现 LTE-A 系统的下行信道测 量。 4路 CSI-RS图样和 8路 CSI-RS图样前 4个端口的图样相同。 新设计的 CSI-RS以一定的周期重复发送图 2所示的图样， 每一个周期 内新设计的 CSI-RS 占用一个子帧发送。 新设计的 CSI-RS每一路天线端口的导频频域间隔为 12个子载波， 在 CSI-RS发送子帧全带宽的每个 RB重复图 2所示的图样。 新设计的 CSI-RS映射在每个子帧的第 14个符号上发送。
0路 CSI-RS和 1路 CSI-RS相邻映射于第 1 , 2个子载波上， 2路 CSI-RS 和 3路 CSI-RS相邻映射于第 4, 5个子载波上， 4路 CSI-RS和 5路 CSI-RS 相邻映射于第 7, 8个子载波上， 6路 CSI-RS和 7路 CSI-RS相邻映射于第 10, 11个子载波上。 实施例二 当实际天线端口数等于 4, 8 时新设计 4路或 8路信道测量导频实现 LTE-A 系统的下行信道测量， 当实际天线端口数等于 1 , 2 时信道测量导频 重用 LTE 系统的公共导频作为信道测量导频实现 LTE-A 系统的下行信道测 量。 4路 CSI-RS图样和 8路 CSI-RS图样前 4个端口的图样相同。 新设计的 4路或 8路 CSI-RS以一定的周期重复发送图 3所示的图样， 每一个周期内新设计的 CSI-RS 占用一个子帧发送。 新设计的 CSI-RS 每一路天线端口的导频频域间隔为 8 个子载波， 在 CSI-RS发送子帧全带宽的每两个 RB重复图 3所示的图样。 新设计的 CSI-RS映射在每个子帧的第 14个符号上发送。
0路 CSI-RS映射于第 1个子载波， 第 9个子载波和第 17个子载波上， 1路 CSI-RS映射于第 2个子载波， 第 10个子载波和第 18个子载波上， 2路 CSI-RS映射于第 3个子载波， 第 11个子载波和第 19个子载波， 3路 CSI-RS 映射于第 4个子载波， 第 12个子载波和第 20个子载波上， 4路 CSI-RS映射 于第 5个子载波， 第 13个子载波和第 21个子载波上， 5路 CSI-RS映射于第 6个子载波， 第 14个子载波和第 22个子载波上， 6路 CSI-RS映射于第 7个 子载波， 第 15个子载波和第 23个子载波， 7路 CSI-RS CSI-RS映射于第 8 个子载波， 第 16个子载波和第 24个子载波上。 实施例三 当实际天线端口数等于 4, 8 时新设计 4路或 8路信道测量导频实现 LTE-A 系统的下行信道测量， 当实际天线端口数等于 1 , 2 时信道测量导频 重用 LTE 系统的公共导频作为信道测量导频实现 LTE-A 系统的下行信道测 量。 4路 CSI-RS图样和 8路 CSI-RS图样前 4个端口的图样相同。 新设计的 4路或 8路 CSI-RS以一定的周期重复发送图 4所示的图样， 每一个周期内新设计的 CSI-RS 占用一个子帧发送。 新设计的 CSI-RS 每一路天线端口的导频频域间隔为 6 个子载波， 在 CSI-RS发送子帧全带宽的每个 RB重复图 4所示的图样。 新设计的 CSI-RS映射在每个子帧的第 11和第 14个符号上发送。
0路 CSI-RS和 1路 CSI-RS相邻映射于第 11个符号的第 1 , 2个子载波 上， 2路 CSI-RS和 3路 CSI-RS相邻映射于第 11个符号的第 4, 5个子载波 上， 4路 CSI-RS和 5路 CSI-RS相邻映射于第 11个符号的第 7, 8个子载波 上， 6路 CSI-RS和 7路 CSI-RS相邻映射于第 11个符号的第 10, 11个子载 波上； 或者 0路 CSI-RS和 1路 CSI-RS相邻映射于第 14个符号的第 7, 8个 子载波上， 2路 CSI-RS和 3路 CSI-RS相邻映射于第 14个符号的第 10, 11 个子载波上， 4路 CSI-RS和 5路 CSI-RS相邻映射于第 14个符号的第 1 , 2 个子载波上， 6路 CSI-RS和 7路 CSI-RS相邻映射于第 14个符号的第 4, 5 个子载波上。 实施例四 当实际天线端口数等于 4, 8 时新设计 4路或 8路信道测量导频实现 LTE-A 系统的下行信道测量， 当实际天线端口数等于 1 , 2 时信道测量导频 重用 LTE 系统的公共导频作为信道测量导频实现 LTE-A 系统的下行信道测 量。 4路 CSI-RS图样和 8路 CSI-RS图样前 4个端口的图样相同。 新设计的 4路或 8路 CSI-RS以一定的周期重复发送图 5所示的图样， 每一个周期内新设计的 CSI-RS 占用一个子帧发送。 新设计的 CSI-RS每一路天线端口的导频频域间隔为 24个子载波， 在 CSI-RS发送子帧全带宽的每两个 RB重复图 5所示的图样。 新设计的 CSI-RS映射在每个子帧的第 14个符号上发送。
0路 CSI-RS映射于第 3个子载波上， 1路 CSI-RS映射于第 6个子载波 上， 2路 CSI-RS映射于第 9个子载波， 3路 CSI-RS映射于第 12个子载波上， 4路 CSI-RS映射于第 15个子载波上， 5路 CSI-RS映射于第 18个子载波上， 6路 CSI-RS映射于第 21个子载波， 7路 CSI-RS映射于第 24个子载波上。 实施例五 当实际天线端口数等于 4, 8 时新设计 4路或 8路信道测量导频实现
LTE-A 系统的下行信道测量， 当实际天线端口数等于 1 , 2 时信道测量导频 重用 LTE 系统的公共导频作为信道测量导频实现 LTE-A 系统的下行信道测 量。 4路 CSI-RS图样和 8路 CSI-RS图样前 4个端口的图样相同。 新设计的 4路或 8路 CSI-RS以一定的周期重复发送图 6所示的图样, 每一个周期内新设计的 CSI-RS 占用一个子帧发送。 新设计的 CSI-RS每一路天线端口的导频频域间隔为 12个子载波， 在 CSI-RS发送子帧全带宽的每个 RB重复图 6所示的图样。 新设计的 CSI-RS映射在每个子帧的第 11个符号上发送。
0路 CSI-RS和 1路 CSI-RS相邻映射于第 1 , 2个子载波上， 2路 CSI-RS 和 3路 CSI-RS相邻映射于第 4, 5个子载波上， 4路 CSI-RS和 5路 CSI-RS 相邻映射于第 7, 8个子载波上， 6路 CSI-RS和 7路 CSI-RS相邻映射于第 10, 11个子载波上。 实施例六 新设计 { 1 , 2, 4, 8}路 CSI-RS , 4路 CSI-RS图样和 8路 CSI-RS图样 前 4个端口的图样相同。 1路 CSI-RS图样和 2路 CSI-RS前一个端口的图样 相同， 2路 CSI-RS图样和 4路 CSI-RS前 2个端口的图样相同， 4路 CSI-RS 图样和 8路 CSI-RS前 4个端口的图样相同。 CSI-RS以一定的周期重复发送图 7所示的图样， 每一个周期内新设计 的 CSI-RS 占用一个子帧发送。 新设计的 CSI-RS每一路天线端口的导频频域间隔为 12个子载波， 在 CSI-RS发送子帧全带宽的每个 RB重复图 7所示的图样。 新设计的 CSI-RS映射在每个子帧的第 6个符号上发送。 0路 CSI-RS和 1路 CSI-RS相邻映射于第 1 , 2个子载波上， 2路 CSI-RS 和 3路 CSI-RS相邻映射于第 4, 5个子载波上， 4路 CSI-RS和 5路 CSI-RS 相邻映射于第 7, 8个子载波上， 6路 CSI-RS和 7路 CSI-RS相邻映射于第 10, 11个子载波上。 实施例七 当实际天线端口数等于 4, 8 时新设计 4路或 8路信道测量导频实现
LTE-A 系统的下行信道测量， 当实际天线端口数等于 1 , 2 时信道测量导频 重用 LTE 系统的公共导频作为信道测量导频实现 LTE-A 系统的下行信道测 量。 4路 CSI-RS图样和 8路 CSI-RS图样前 4个端口的图样相同。 新设计的 4路或 8路 CSI-RS以一定的周期重复发送图 8所示的图样， 每一个周期内新设计的 CSI-RS 占用一个子帧发送。 新设计的 CSI-RS每一路天线端口的导频频域间隔为 12个子载波， 在 CSI-RS发送子帧全带宽的每个 RB重复图 6所示的图样。 新设计的 CSI-RS 0-3路映射在每个子帧的第 6个符号上发送； 4-7路映 射在每个子帧的第 11个符号上发送。
0路 CSI-RS和 4路 CSI-RS 映射于第 1个子载波上， 1路 CSI-RS和 5 路 CSI-RS 映射于第 4个子载波上， 2路 CSI-RS和 6路 CSI-RS 映射于第 7 个子载波上， 3路 CSI-RS和 7路 4路 CSI-RS 映射于第 10个子载波上。 实施例八 当实际天线端口数等于 4, 8 时新设计 4路或 8路信道测量导频实现 LTE-A 系统的下行信道测量， 当实际天线端口数等于 1 , 2 时信道测量导频 重用 LTE 系统的公共导频作为信道测量导频实现 LTE-A 系统的下行信道测 量。 4路 CSI-RS图样和 8路 CSI-RS图样前 4个端口的图样相同。 新设计的 4路或 8路 CSI-RS以一定的周期重复发送图 9所示的图样， 每一个周期内新设计的 CSI-RS 占用一个子帧发送。 新设计的 CSI-RS每一路天线端口的导频频域间隔为 12个子载波， 在 CSI-RS发送子帧全带宽的每个 RB重复图 6所示的图样。 新设计的 CSI-RS 0-3路映射在每个子帧的第 6个符号上发送； 4-7路在 每个子帧的第 11个符号上发送。
0路 CSI-RS和 1路 CSI-RS相邻映射于第 1 , 2个子载波上， 2路 CSI-RS 和 3路 CSI-RS相邻映射于第 7, 8个子载波上 4, 5 , 6, 7路的频域位置分 别和 0, 1 , 2, 3路相同。 实施例九 当实际天线端口数等于 4, 8 时新设计 4路或 8路信道测量导频实现 LTE-A 系统的下行信道测量， 当实际天线端口数等于 1 , 2 时信道测量导频 重用 LTE 系统的公共导频作为信道测量导频实现 LTE-A 系统的下行信道测 量。 4路 CSI-RS图样和 8路 CSI-RS图样前 4个端口的图样相同。 新设计的 4路或 8路 CSI-RS以一定的周期重复发送图 10所示的图样， 每一个周期内新设计的 CSI-RS 占用一个子帧发送。 新设计的 CSI-RS每一路天线端口的导频频域间隔为 12个子载波， 在
CSI-RS发送子帧全带宽的每个 RB重复图 6所示的图样。 新设计的 CSI-RS 0-3路映射在每个子帧的第 6个符号上发送； 4-7路映 射在每个子帧的第 14个符号上发送。
0路 CSI-RS和 1路 CSI-RS相邻映射于第 1 , 2个子载波上， 2路 CSI-RS 和 3路 CSI-RS相邻映射于第 7, 8个子载波上 4, 5 , 6, 7路的频域位置分 别和 0, 1 , 2, 3路相同。 图 11是才艮据本发明的信道测量导频发送系统 1100的框图。 如图 11所 示， 该系统包括： 发送模块 1102 , 用于在一个发送周期内， 使每路信道测量 导频在一个子帧或相邻的两个子帧发送， 并且按预定组成单元为单位全带宽 等间隔重复发送每路信道测量导频。 其中，发送模块 1102可以包括：第一信道测量导频路数设置单元 1102a , 用于新设计 { 1 , 2, 4, 8}路信道测量导频， 其中， 1 路信道测量导频的图样 和 2路信道测量导频的前一个端口的图样相同， 2路信道测量导频的图样和 4路信道测量导频的前 2个端口的图样相同， 以及 4路信道测量导频的图样 和 8路信道测量导频的前 4个端口的图样相同； 以及第二信道测量导频路数 设置单元 1102b , 用于新设计 {4, 8}路信道测量导频， 当实际天线端口数等 于 4或 8时， 新设计的 4路或 8路信道测量导频实现了高级长期演进系统的 下行信道测量，以及当实际天线端口数等于 1或 2时，信道测量导频重用 LTE 系统的公共导频， 作为信道测量导频， 以实现高级长期演进系统的下行信道 测量， 其中， 4路信道测量导频的图样和 8路信道测量导频的图样在前 4个 端口的图样相同。 在本发明中， 不同发送周期的信道测量导频图样相同， 所述信道测量导 频在所配置的子帧的第 6、 9、 14个符号上发送， 以 0、 2、 5、 10或 20中任 一个数字的子帧为周期发送所述信道测量导频， 并且所述信道测量导频预定 组成单元等间 P鬲重复的频域间 P鬲为 {6, 8, 12, 16, 24,30,36,42,48}„ 另外， 才艮据本发明的信道测量导频发送系统还可以包括： 重复发送单元 1104, 用于使所述信道测量导频和新设计的信道测量导频以一个或两个 RB 为预定组成单元在全带宽等间隔重复发送， 8 路的信道测量导频位于发送子 帧的第 14个 OFDM符号上。 虽然以上本发明将预定组成单元每个 RB发送， 但是应了解， 本发明还 可以被应用于将预定组成单元间隔 2个 RB, 或者间隔 1.5个 RB, 或者间隔 2.5个 RB, 或者间隔 3个 RB全带宽等间隔发送。 本领域的技术人员应理解，上述的本发明的发送方法可以用通用的计算 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。 综上所述， 通过本发明， 保持了 LTE系统 CRS发送， 对 LTE用户影响 4艮小， 并且提供了 高阶 MIMO 和 COMP 所需的导频信息， 有利于 LTE- Advanced用户提高单链路质量。 另外， 由于釆用了更为稀疏的设计， 降 低了对 LTE用户的性能降级， 而且设计开销低， 可以保证信道测量的性能， 能提高 LTE-A系统吞吐量。 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^"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. 一种信道测量导频发送方法， 其特征在于， 包括以下步骤：
在一个发送周期内，每路信道测量导频在一个子帧或相邻的两个子 帧发送， 并且所述每路信道测量导频按预定组成单元为单位全带宽等间 隔重复发送。
2. 根据权利要求 1所述的信道测量导频发送方法， 其特征在于， 新设计 { 1 , 2, 4, 8}路信道测量导频， 其中，
1路信道测量导频的图样和 2路信道测量导频的前一个端口的图样 相同， 2路信道测量导频的图样和 4路信道测量导频的前 2个端口的图 样相同， 以及 4路信道测量导频的图样和 8路信道测量导频的前 4个端 口的图样相同。
3. 根据权利要求 1所述的信道测量导频发送方法， 其特征在于， 新设计 {4, 8}路信道测量导频，
当实际天线端口数等于 4或 8时，新设计的 4路或 8路信道测量导 频实现了高级长期演进系统的下行信道测量； 以及
当实际天线端口数等于 1或 2时， 所述信道测量导频重用 LTE系 统的公共导频， 作为信道测量导频， 以实现所述高级长期演进系统的下 行信道测量；
其中， 4路信道测量导频的图样和 8路信道测量导频的图样在前 4 个端口的图样相同。
4. 才艮据权利要求 1所述的信道测量导频发送方法， 其特征在于， 不同发送 周期的信道测量导频图样相同。
5. 根据权利要求 1所述的信道测量导频发送方法， 所述信道测量导频在所 配置的子帧的第 6、 9、 14个符号上发送。
6. 居权利要求 1所述的信道测量导频发送方法， 其特征在于， 以 0、 2、 5、 10或 20中任一个数字的子帧为周期发送所述信道测量导频。
7. 根据权利要求 1所述的信道测量导频发送方法， 其特征在于， 所述信道 测量导频预定组成单元等间隔重复的频域间隔为 {6, 8, 12, 16, 24,30,36,42,48}。
8. 根据权利要求 3所述的信道测量导频发送方法， 其特征在于， 新设计的 信道测量导频以一个 RB 为预定组成单元在全带宽等间隔重复发送， 8 路的信道测量导频位于发送子帧的第 14个 OFDM符号上， 其中，
0路信道测量导频和 1路信道测量导频相邻映射于第 1、 2个子载 波上， 2路信道测量导频和 3路信道测量导频相邻映射于第 4、 5个子载 波上， 4路信道测量导频和 5路信道测量导频相邻映射于第 7、 8个子载 波上， 以及 6路信道测量导频和 7路信道测量导频相邻映射于第 10、 11 个子载波上。
9. 根据权利要求 3所述的信道测量导频发送方法， 其特征在于， 新设计的 信道测量导频以两个 RB 为预定组成单元在全带宽等间隔重复发送， 8 路的信道测量导频位于发送子帧的第 14个 OFDM符号上， 其中，
0路信道测量导频映射于第 1个子载波、 第 9个子载波和第 17个 子载波上， 1路信道测量导频映射于第 2个子载波、 第 10个子载波和第 18个子载波上， 2路信道测量导频映射于第 3个子载波、 第 11个子载波 和第 19个子载波， 3路信道测量导频映射于第 4个子载波、 第 12个子 载波和第 20个子载波上， 4路信道测量导频映射于第 5个子载波、 第 13 个子载波和第 21个子载波上， 5路信道测量导频映射于第 6个子载波、 第 14个子载波和第 22个子载波上， 6路信道测量导频映射于第 7个子 载波、 第 15个子载波和第 23个子载波， 以及 7路信道测量导频映射于 第 8个子载波、 第 16个子载波和第 24个子载波上。
10. 根据权利要求 3所述的信道测量导频发送方法， 其特征在于， 新设计的 信道测量导频以一个 RB 为预定组成单元在全带宽等间隔重复发送， 8 路的信道测量导频位于发送子帧的第 11个和第 14个 OFDM符号上， 其 中，
在第 11 个符号上， 0路信道测量导频和 1路信道测量导频相邻映 射于第 1、 2个子载波上， 2路信道测量导频和 3路信道测量导频相邻映 射于第 4、 5个子载波上， 4路信道测量导频和 5路信道测量导频相邻映 射于第 7、 8个子载波上， 以及 6路信道测量导频和 7路信道测量导频相 邻映射于第 10、 11个子载波上； 第 14个 OFDN符号上 0路信道测量导 频和 1路信道测量导频相邻映射于第 14个符号的第 7、 8个子载波上， 2 路信道测量导频和 3路信道测量导频相邻映射于第 14个符号的第 10、 11个子载波上， 4路信道测量导频和 5路信道测量导频相邻映射于第 14 个符号的第 1、 2个子载波上， 以及 6路信道测量导频和 7路信道测量导 频相邻映射于第 14个符号的第 4、 5个子载波上。
11. 根据权利要求 3所述的信道测量导频发送方法， 其特征在于， 新设计的 信道测量导频以两个 RB 为预定组成单元在全带宽等间隔重复发送， 8 路的信道测量导频位于发送子帧的第 14个 OFDM符号上， 其中，
0路信道测量导频映射于第 3个子载波上， 1路信道测量导频映射 于第 6个子载波上， 2路信道测量导频映射于第 9个子载波， 3路信道测 量导频 映射于第 12个子载波上， 4路信道测量导频映射于第 15个子载 波上， 5路信道测量导频映射于第 18个子载波上， 6路信道测量导频映 射于第 21个子载波， 以及 7路信道测量导频映射于第 24个子载波上。
12. 根据权利要求 3所述的信道测量导频发送方法， 其特征在于， 新设计的 信道测量导频以一个 RB 为预定组成单元在全带宽等间隔重复发送， 8 路的信道测量导频位于发送子帧的第 11个 OFDM符号上， 其中，
0路信道测量导频和 4路信道测量导频映射于第 1个子载波上， 1 路信道测量导频和 5路信道测量导频映射于第 4个子载波上， 2路信道 测量导频和 6路信道测量导频映射于第 7个子载波上， 以及 3路信道测 量导频和 7路信道测量导频映射于第 10个子载波上。
13. 根据权利要求 3所述的信道测量导频发送方法， 其特征在于， 所述信道 测量导频以一个 RB为预定组成单元在全带宽等间隔重复发送， 8路的信 道测量导频位于发送子帧的第 6个 OFDM符号上， 其中，
0路信道测量导频和 1路信道测量导频相邻映射于第 1 , 2个子载 波上， 2路信道测量导频和 3路信道测量导频相邻映射于第 7、 8个子载 波上， 以及 4、 5、 6、 7路信道测量导频的频域位置分别和 0、 1、 2、 3 路信道测量导频的频域位置相同， 并且每路信道测量导频在不同天线端 口配置时都相同， 同时支持 1、 2、 4、 8路信道测量导频的映射。
14. 根据权利要求 3所述的信道测量导频发送方法， 其特征在于， 所述信道 测量导频以一个 RB为预定组成单元在全带宽等间隔重复发送， 其中， 8路信道测量导频位于发送子帧的第 6个和第 11个 OFDM符号上， 0路 CSI-RS映射于第 6个 OFDM符号的第 1个子载波上， 1路 CSI-RS 映 射于第 6个 OFDM符号的第 4个子载波上， 2路 CSI-RS映射于第 6个 OFDM符号的第 7个子载波上， 3路 CSI-RS映射于第 6个 OFDM符号 的第 10个子载波上； 4路 CSI-RS 映射于第 11个 OFDM符号的第 1个 子载波上， 5路 CSI-RS 映射于第 11个 OFDM符号的第 4个子载波上， 以及 6路 CSI-RS 映射于第 11个 OFDM符号的第 7个子载波上， 和 7 路 4路 CSI-RS 映射于第 11个 OFDM符号的第 10个子载波上。
15. 根据权利要求 3所述的信道测量导频发送方法， 其特征在于， 所述信道 测量导频以一个 RB为预定组成单元在全带宽等间隔重复发送， 其中，
8路信道测量导频位于发送子帧的第 6个和第 11个 OFDM符号上， 0路 CSI-RS和 1路 CSI-RS相邻映射于第 6个 OFDM符号的第 1、 2个 子载波上， 2路 CSI-RS和 3路 CSI-RS相邻映射于第 6个 OFDM符号的 第 7、 8个子载波上， 4、 5、 6、 7路映射于第 11个符号， 其频域位置分 另' J矛口 0、 1、 2、 3 if各 目同。
16. 根据权利要求 1所述的信道测量导频发送方法， 其特征在于， 所述信道 测量导频以一个 RB为预定组成单元在全带宽等间隔重复发送， 其中，
8路信道测量导频位于发送子帧的第 6个和第 11个 OFDM符号上， 0路 CSI-RS和 1路 CSI-RS相邻映射于第 6个 OFDM符号的第 1、 2个 子载波上， 2路 CSI-RS和 3路 CSI-RS相邻映射于第 6个 OFDM符号的 第 7、 8个子载波上， 4、 5、 6、 7路映射于第 14个符号， 其频域位置分 另' J矛口 0、 1、 2、 3 if各 目同。
17. —种信道测量导频发送系统， 其特征在于， 包括： 发送模块， 用于在一个发送周期内， 使每路信道测量导频在一个子 帧或相邻的两个子帧发送， 并且按预定组成单元为单位全带宽等间隔重 复发送所述每路信道测量导频。
18. 居权利要求 17所述的信道测量导频发送系统， 其特征在于， 所述发送 模块包括：
第一信道测量导频路数设置单元， 用于新设计 { 1 , 2 , 4 , 8}路信道 测量导频， 其中， 1路信道测量导频的图样和 2路信道测量导频的前一 个端口的图样相同， 2路信道测量导频的图样和 4路信道测量导频的前 2 个端口的图样相同， 以及 4路信道测量导频的图样和 8路信道测量导频 的前 4个端口的图样相同； 以及
第二信道测量导频路数设置单元， 用于新设计 {4, 8}路信道测量导 频， 当实际天线端口数等于 4或 8时， 新设计的 4路或 8路信道测量导 频实现了高级长期演进系统的下行信道测量， 以及当实际天线端口数等 于 1或 2时， 所述信道测量导频重用 LTE系统的公共导频， 作为信道测 量导频， 以实现所述高级长期演进系统的下行信道测量， 其中， 4 路信 道测量导频的图样和 8路信道测量导频的图样在前 4个端口的图样相同。
19. 才艮据权利要求 17所述的信道测量导频发送系统， 其特征在于， 不同发送 周期的信道测量导频图样相同， 所述信道测量导频在所配置的子帧的第 6、 9、 14个符号上发送， 以 0、 2、 5、 10或 20中任一个数字的子帧为 周期发送所述信道测量导频， 并且所述信道测量导频预定组成单元等间 P鬲重复的频域间隔为 {6, 8, 12, 16, 24,30,36,42,48}。
20. 居权利要求 17所述的信道测量导频发送系统， 其特征在于， 还包括： 重复发送单元， 用于以一个或两个 RB为预定组成单元在全带宽等 间隔重复发送所述信道测量导频和新设计的信道测量导频， 其中， 8 路 的信道测量导频位于发送子帧的第 14个 OFDM符号上。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104770028A (zh) * 2012-09-29 2015-07-08 华为技术有限公司 参考信号发送和接收的方法和装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102158292B (zh) * 2010-02-12 2016-01-20 中兴通讯股份有限公司 信道测量导频发送方法及基站
US8743980B2 (en) * 2010-08-12 2014-06-03 Acer Incorporated Method of designing reference signal pattern and related communication device
CN103138869B (zh) * 2011-11-22 2015-08-19 中国移动通信集团公司 信道状态信息参考信号的发送方法、基站及中继
CN109743148B (zh) * 2012-12-31 2021-11-19 上海华为技术有限公司 参考信号配置方法和参考信号发送方法及相关设备
WO2016126119A1 (ko) * 2015-02-04 2016-08-11 엘지전자 주식회사 무선 통신 시스템에서 신호를 송수신하는 방법 및 이를 위한 장치
CN108024215A (zh) * 2016-11-04 2018-05-11 中兴通讯股份有限公司 一种多播业务的传输方法及装置
US10921367B2 (en) 2019-03-06 2021-02-16 Analog Devices, Inc. Stable measurement of sensors methods and systems
FR3103345B1 (fr) 2019-11-18 2022-07-29 Pascal Roussel Système d’adaptateur de communication pour filtre acoustique de protecteur individuel avec mixage des sons extérieurs
US20220029870A1 (en) * 2020-10-13 2022-01-27 Peng Lu Phase tracking reference signal for 6g wireless communication

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101162987A (zh) * 2007-11-10 2008-04-16 中兴通讯股份有限公司 一种时分双工系统上行特殊时隙中导频信号的发送方法
WO2008054128A1 (en) * 2006-11-01 2008-05-08 Lg Electronics Inc. Method for allocating pilots
CN101184073A (zh) * 2006-11-14 2008-05-21 中兴通讯股份有限公司 基于正交频分复用的多发射天线系统的导频信号发送方法
CN101286762A (zh) * 2007-04-10 2008-10-15 华为技术有限公司 一种发送sounding导频的方法及发送装置
US20090034484A1 (en) * 2007-08-01 2009-02-05 Broadcom Corporation Synchronization channel noise power estimation

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100617835B1 (ko) * 2005-01-05 2006-08-28 삼성전자주식회사 통신 시스템에서 채널 품질 정보 송수신 장치 및 방법
CN101090558A (zh) * 2006-06-15 2007-12-19 华为技术有限公司 上行导频信号的发送方法及其系统
US8300658B2 (en) * 2007-03-21 2012-10-30 Motorola Mobility Llc Apparatuses and methods for multi-antenna channel quality data acquisition in a broadcast/multicast service network using a multicast symbol
US8369450B2 (en) 2007-08-07 2013-02-05 Samsung Electronics Co., Ltd. Pilot boosting and traffic to pilot ratio estimation in a wireless communication system
CN101106395A (zh) * 2007-08-15 2008-01-16 中兴通讯股份有限公司 控制信令和测量导频的发射方法
KR101376233B1 (ko) * 2007-10-02 2014-03-21 삼성전자주식회사 주파수 분할 다중 접속 방식의 시스템에서 제어 채널의자원 할당 장치 및 방법
US9647810B2 (en) * 2009-03-17 2017-05-09 Samsung Electronics Co., Ltd. Method and system for mapping pilot signals in multi-stream transmissions
WO2010107129A1 (en) 2009-03-19 2010-09-23 Nec Corporation Improved channel quality indicator method
KR101367570B1 (ko) * 2009-09-27 2014-02-26 엘지전자 주식회사 무선 통신 시스템에서 참조 신호 전송 방법 및 장치
KR101819502B1 (ko) * 2010-02-23 2018-01-17 엘지전자 주식회사 간섭 측정 방법 및 단말과, 간섭 정보 수신 방법 및 기지국

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008054128A1 (en) * 2006-11-01 2008-05-08 Lg Electronics Inc. Method for allocating pilots
CN101184073A (zh) * 2006-11-14 2008-05-21 中兴通讯股份有限公司 基于正交频分复用的多发射天线系统的导频信号发送方法
CN101286762A (zh) * 2007-04-10 2008-10-15 华为技术有限公司 一种发送sounding导频的方法及发送装置
US20090034484A1 (en) * 2007-08-01 2009-02-05 Broadcom Corporation Synchronization channel noise power estimation
CN101162987A (zh) * 2007-11-10 2008-04-16 中兴通讯股份有限公司 一种时分双工系统上行特殊时隙中导频信号的发送方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2469734A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104770028A (zh) * 2012-09-29 2015-07-08 华为技术有限公司 参考信号发送和接收的方法和装置
CN104770028B (zh) * 2012-09-29 2018-10-30 华为技术有限公司 参考信号发送和接收的方法和装置

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