WO2008023330A2 - Methods for transmitting data in a mobile system and radio stations therefor - Google Patents

Methods for transmitting data in a mobile system and radio stations therefor Download PDF

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Publication number
WO2008023330A2
WO2008023330A2 PCT/IB2007/053330 IB2007053330W WO2008023330A2 WO 2008023330 A2 WO2008023330 A2 WO 2008023330A2 IB 2007053330 W IB2007053330 W IB 2007053330W WO 2008023330 A2 WO2008023330 A2 WO 2008023330A2
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WO
WIPO (PCT)
Prior art keywords
data streams
indicator
rate
transmission
station
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IB2007/053330
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English (en)
French (fr)
Other versions
WO2008023330A3 (en
Inventor
Matthew P. J. Baker
Timothy J. Moulsley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to CN2007800312887A priority Critical patent/CN101507142B/zh
Priority to EP07826072.6A priority patent/EP2067278B1/en
Priority to JP2009525159A priority patent/JP5253398B2/ja
Priority to US12/438,030 priority patent/US8675508B2/en
Priority to ES07826072.6T priority patent/ES2590357T3/es
Publication of WO2008023330A2 publication Critical patent/WO2008023330A2/en
Publication of WO2008023330A3 publication Critical patent/WO2008023330A3/en
Anticipated expiration legal-status Critical
Priority to US14/166,900 priority patent/US10205579B2/en
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0645—Variable feedback
    • H04B7/0647—Variable feedback rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing

Definitions

  • the present invention relates to a method for transmitting data in a mobile telecommunication system, to a primary station and to a secondary station associated.
  • This invention is, for example, relevant for the mobile networks like the UMTS, and especially for radio systems with terminals having a plurality of antennas.
  • 3GPP (3rd Generation Partnership Project) documents are incorporated by reference. In particular, they contain details about the terminology used in the present patent application. The documents are publicly available for download from www.3gpp.org. a) 3GPP Technical Report 25.876 Vl .8.0 (2005-10) "Multiple Input Multiple Output (MIMO) antennas in UTRA"., particularly for Double Transmit Antenna Array (D-TxAA). b) 3GPP Technical Specification 25.212 "Multiplexing and channel coding
  • FDD Physical Layer Procedures
  • FBI Feedback Information
  • D-TxAA Double Transmit Antenna Array
  • TxAA mode 1 an existing closed loop transmit diversity scheme
  • TxAA mode 2 two different data streams are transmitted using orthogonal weight vectors, one weight vector being based on those transmitted from the mobile terminal, and the other vector being derived deterministically from the first.
  • Feedback information (FBI) for the first beam is derived by the UE and transmitted to Node B, indicating the desired beamforming vector.
  • the first beam is transmitted using a restricted code book of weight vectors (for example the codebook currently used for TxAA mode 1).
  • the identity of the antenna weight vector for the first beam is signalled to the UE on the High-Speed Shared Control Channel (HS-SCCH).
  • HS-SCCH High-Speed Shared Control Channel
  • the second beam is transmitted using a deterministic phase vector which is typically orthonormal to the vector for the first beam.
  • CQI Channel quality information
  • the CQI indicates the rate (or packet size) which can be transmitted successfully
  • the transmissions on the two beams are comprised of separate codewords with potentially different rates.
  • the Node B In order for the Node B to determine how many codewords can be simultaneously transmitted, it needs information about how many and which beams can support the transmission of a codeword. Typically this is done by CQI reporting, which also includes information about the supportable rate for each codeword. However, frequent CQI reporting results in a high signalling load. A reduced CQI reporting rate may be used, but the Node B will then be slower to react to changes in the rank of the channel, resulting in failed transmissions of codewords on beams, which cannot support transmission, or wasted capacity when beams are not used which could support a transmission.
  • a method for transmitting data from a primary station to a secondary station, on a plurality of data streams comprising: at the secondary station measuring the quality of the data streams, and signalling at a first rate to the primary station in a first indicator a CQI report representative of the quality of the data streams, and signalling at a second rate, greater than the first rate, in a second indicator a quantity of data that can be transmitted on the data streams; at the primary station transmitting the data streams on the basis of the first and second indicators.
  • a fast rank indicator is signalled from the secondary station or User Equipment (UE) to the primary station or Node B to enable rapid adjustment of the number of simultaneously-transmitted codewords without requiring CQI to be transmitted every sub-frame.
  • the indicator may only indicate the number of available data streams that can support a codeword. Thus, the size of this indicator is reduced and, even if this indicator is sent very frequently (in each frame or subframe), it does not lead to too much overhead.
  • the present invention also relates to a method for transmitting a plurality of data streams from a primary station to a secondary station on a plurality of transmission beams, said method comprising: at the secondary station measuring the channel quality corresponding to each transmission beam, and signalling to the primary station a plurality of antenna weights; at the primary station computing at least a first transmission beam on the basis of the plurality of antenna weights, and transmitting the data streams on the transmission beams including the first transmission beam.
  • Fig.l is a block diagram of a system comprising a primary station and a secondary station in accordance with the invention
  • Fig.2 is a time chart representing the channel format in accordance with an embodiment of the invention.
  • the present invention relates to a system of communication 300 as depicted in
  • Fig.l comprising a primary station 100, like a base station, and at least one secondary station 200 like a mobile station. More specifically, this invention can be applied in multi- antenna communication systems, and in particular, potential application is foreseen in the MIMO feature currently being standardised for UMTS Release 7.
  • the radio system 300 may comprise a plurality of the primary stations 100 and/or a plurality of secondary stations 200.
  • the primary station 100 comprises a transmitter means 110 and a receiving means 120.
  • An output of the transmitter means 110 and an input of the receiving means 120 are coupled to an antenna array 130, including at least two antennas, by a coupling means 140, which may be for example a circulator or a changeover switch.
  • Coupled to the transmitter means 110 and receiving means 120 is a control means 150, which may be for example a processor.
  • the secondary station 200 comprises a transmitter means 210 and a receiving means 220.
  • An output of the transmitter means 210 and an input of the receiving means 220 are coupled to an antenna 230, or to an antenna array, by a coupling means 240, which may be for example a circulator or a changeover switch.
  • Coupled to the transmitter means 210 and receiving means 220 is a control means 250, which may be for example a processor. Transmission from the primary radio station 100 to the secondary station 200 takes place on a first channel 160 and transmission from the secondary radio station 200 to the first radio station 100 takes place on a second channel 260.
  • the first channel 160 takes place on a plurality of transmission beams. These transmission beams may be steered to be directed along at least one direction preferred by the secondary station 200.
  • CQI reports are transmitted periodically. Typically, such CQI reports may indicate the quality of the beams, or a rate (or packet size) which can be transmitted successfully for each data streams.
  • a fast rank indicator is signalled from the secondary station 200 to primary station 100 to enable rapid adjustment of the number of simultaneously-transmitted codewords or data streams without requiring CQI to be transmitted every sub-frame.
  • This fast rank indicator is coded with a low number of bits, so that the frequent transmission of this indicator does not lead to too much overhead. As illustrated on Fig.2, this indicator may be transmitted every subframe.
  • the CQI reports may not be transmitted so often, and could be transmitted for instance every four subframes, or even less often, so that it reduces the overhead.
  • the fast rank indicator is time-multiplexed with antenna weight feedback, by observing that the relationship between the size of the codebook (and therefore the number of bits required for antenna weight feedback) and the length of the subframe (and therefore the number of physical channel bits available for transmitting antenna weight feedback) may result in one or more spare bit-positions which can be used for transmitting the fast rank indicator.
  • the MIMO scheme for ReI- 7 would be a dual-codeword MIMO scheme based on D-TxAA, with the antenna weights being signalled on the HS-SCCH.
  • the term "primary beam” will be used to designate the beam that is formed on the basis of the secondary station 200 feedback.
  • the beam that is formed using an orthogonal weight vector to that of the first beam is referred to as the "secondary beam”.
  • this secondary beam is formed with help on a second feedback from the secondary station or for instance on a spatial measurement of the noise.
  • the primary beam is configured according to the feedback from the UE in a similar way to the beamforming for closed- loop mode 1.
  • a criterion for D-TxAA feedback may be chosen, so that the criterion for calculating the FBI feedback bits would allow the possibility of maximising the received SIR.
  • this bit is available for uplink signalling.
  • it could be used as a fast "rank indicator", to indicate to the Node B whether the second beam is able to support a second codeword or not.
  • the secondary station may signal to the primary station the complex weights for building the primary beam, with help of a plurality of antenna weights.
  • the primary station constructs the primary beam by deducing it from the plurality of weights, for instance by averaging the complex weights.
  • the primary station is able to compute the primary by deriving an average from 3 antenna weights, doubling thus the size of the primary station codebook, and adding one bit available for the signaling.
  • the codebook of weights used for beamforming could be the same as the current codebook for closed loop mode 1, or be extended by additional entries, or be a different codebook. This may be incompatible with some Node B architectures.
  • the criterion for calculating the FBI feedback bits should allow the possibility of maximising the received SIR, not the "received power" as currently specified in TS25.214 for closed loop mode 1.
  • the antenna weights in the downlink are fixed for the duration of an HS-DSCH subframe.
  • the basic definition of the FBI bits, averaging at the Node B, and the codebook may be kept as in closed loop mode 1, and the redundant third FBI field is used as a fast rank indicator.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
PCT/IB2007/053330 2006-08-22 2007-08-21 Methods for transmitting data in a mobile system and radio stations therefor Ceased WO2008023330A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN2007800312887A CN101507142B (zh) 2006-08-22 2007-08-21 用于在移动系统及其无线电站中发送数据的方法
EP07826072.6A EP2067278B1 (en) 2006-08-22 2007-08-21 Method for transmitting data in a mobile system and radio stations therefor
JP2009525159A JP5253398B2 (ja) 2006-08-22 2007-08-21 移動通信システムにおいてデータを送信する方法、及びその方法のための無線局
US12/438,030 US8675508B2 (en) 2006-08-22 2007-08-21 Methods for transmitting data in a mobile system and radio stations therefor
ES07826072.6T ES2590357T3 (es) 2006-08-22 2007-08-21 Procedimiento para la transmisión de datos en un sistema móvil y las estaciones de radio para ello
US14/166,900 US10205579B2 (en) 2006-08-22 2014-01-29 Methods for transmitting data in a mobile system and radio stations therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06119342.1 2006-08-22
EP06119342 2006-08-22

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US12/438,030 A-371-Of-International US8675508B2 (en) 2006-08-22 2007-08-21 Methods for transmitting data in a mobile system and radio stations therefor
US14/166,900 Continuation US10205579B2 (en) 2006-08-22 2014-01-29 Methods for transmitting data in a mobile system and radio stations therefor

Publications (2)

Publication Number Publication Date
WO2008023330A2 true WO2008023330A2 (en) 2008-02-28
WO2008023330A3 WO2008023330A3 (en) 2008-07-10

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PCT/IB2007/053330 Ceased WO2008023330A2 (en) 2006-08-22 2007-08-21 Methods for transmitting data in a mobile system and radio stations therefor

Country Status (7)

Country Link
US (2) US8675508B2 (enExample)
EP (1) EP2067278B1 (enExample)
JP (1) JP5253398B2 (enExample)
CN (1) CN101507142B (enExample)
ES (1) ES2590357T3 (enExample)
PL (1) PL2067278T3 (enExample)
WO (1) WO2008023330A2 (enExample)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
US8811513B2 (en) 2010-02-05 2014-08-19 Qualcomm Incorporated Antenna switching in a closed loop transmit diversity system

Also Published As

Publication number Publication date
JP5253398B2 (ja) 2013-07-31
US10205579B2 (en) 2019-02-12
ES2590357T3 (es) 2016-11-21
US8675508B2 (en) 2014-03-18
US20140146774A1 (en) 2014-05-29
JP2010502083A (ja) 2010-01-21
CN101507142A (zh) 2009-08-12
EP2067278B1 (en) 2016-06-15
CN101507142B (zh) 2013-02-06
EP2067278A2 (en) 2009-06-10
WO2008023330A3 (en) 2008-07-10
US20100234011A1 (en) 2010-09-16
PL2067278T3 (pl) 2017-07-31

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