Title:
BASE STATION AND METHOD FOR ALLOCATING FREQUENCY TO PILOT SEQUENCE
Document Type and Number:
WIPO Patent Application WO/2007/141848
Kind Code:
A1
Abstract:
A base station for allocating a frequency to a pilot signal of the uplink in a radio communication
system stores correspondence relationships between a plurality of pilot sequences
having different peak-to-average power characteristics and a plurality of
frequencies used in frequency-multiplexing each of the pilot sequences. The
correspondence relationships are made to be different in the adjacent cells
or sectors. The base station then measures the reception quality of a signal
received from a user terminal, refers to the stored correspondence relationships,
determines a pilot sequence having peak-to-average power characteristics corresponding
to the reception quality, and instructs the user terminal to transmit the pilot
sequences by using frequency allocated to the pilot sequence.
Inventors:
KIMURA DAI (JP)
SHIMOMURA TSUYOSHI (JP)
SHIMOMURA TSUYOSHI (JP)
Application Number:
PCT/JP2006/311386
Publication Date:
December 13, 2007
Filing Date:
June 07, 2006
Export Citation:
Assignee:
FUJITSU LTD (JP)
KIMURA DAI (JP)
SHIMOMURA TSUYOSHI (JP)
KIMURA DAI (JP)
SHIMOMURA TSUYOSHI (JP)
International Classes:
H04J1/00; H04B1/707
Foreign References:
| JP2002111627A | 2002-04-12 | |||
| JP2001339758A | 2001-12-07 | |||
| JP2006302050W | 2006-02-07 |
Other References:
NEC GROUP: "Consideration on uplink pilot design using CAZAC", 3GPP TSG RAN WG1 MEETING #44BIS R1-060831, March 2006 (2006-03-01), XP003002423, Retrieved from the Internet
TEXAS INSTRUMENTS: "Uplink Pilot: Link and System Level Considerations & Text Proposal", 3GPP TSG RAN WG1 #45 R1-061623, May 2006 (2006-05-01), XP003002424, Retrieved from the Internet
LG ELECTRONICS: "Uplink pilot for channel quality measurement", 3GPP TSG RAN WG1#44 R1-060537, February 2006 (2006-02-01), XP003002425, Retrieved from the Internet
NTT DOCOMO ET AL.: "Frequency Domain Channel-Dependent Scheduling with Adaptive Transmission Bandwidth of Pilot Channel for CQI Measurement for E-UTRA Uplink", 3GPP TSG RAN WG1#45 R1-061203, May 2006 (2006-05-01), XP003002426, Retrieved from the Internet
NTT DOCOMO ET AL.: "Orthogonal Pilot Channel Structure for E-UTRA Uplink", 3GPP TSG RAN WG1#44-BIS R1-060784, March 2006 (2006-03-01), XP003002427, Retrieved from the Internet
D.C. CHU: "Polyphase Codes With Good Periodic Correlation Properties", IEEE TRANSACTIONS ON INFORMATION THEORY, July 1972 (1972-07-01), pages 531 - 532
K. FAZEL; S. KEISER: "Multi Carrier and Spread Spectrum Systems", 2003, JOHN WILLEY AND SONS
See also references of EP 2028776A4
TEXAS INSTRUMENTS: "Uplink Pilot: Link and System Level Considerations & Text Proposal", 3GPP TSG RAN WG1 #45 R1-061623, May 2006 (2006-05-01), XP003002424, Retrieved from the Internet
LG ELECTRONICS: "Uplink pilot for channel quality measurement", 3GPP TSG RAN WG1#44 R1-060537, February 2006 (2006-02-01), XP003002425, Retrieved from the Internet
NTT DOCOMO ET AL.: "Frequency Domain Channel-Dependent Scheduling with Adaptive Transmission Bandwidth of Pilot Channel for CQI Measurement for E-UTRA Uplink", 3GPP TSG RAN WG1#45 R1-061203, May 2006 (2006-05-01), XP003002426, Retrieved from the Internet
NTT DOCOMO ET AL.: "Orthogonal Pilot Channel Structure for E-UTRA Uplink", 3GPP TSG RAN WG1#44-BIS R1-060784, March 2006 (2006-03-01), XP003002427, Retrieved from the Internet
D.C. CHU: "Polyphase Codes With Good Periodic Correlation Properties", IEEE TRANSACTIONS ON INFORMATION THEORY, July 1972 (1972-07-01), pages 531 - 532
K. FAZEL; S. KEISER: "Multi Carrier and Spread Spectrum Systems", 2003, JOHN WILLEY AND SONS
See also references of EP 2028776A4
Attorney, Agent or Firm:
SAITO, Chimoto (Koei-Palace 202 14-10, Makuharihongo 1-chome, Hanamigawa-ku, Chiba-sh, Chiba 33, JP)
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