User terminal apparatus and base station apparatus

• US 8,614,993 B2
• Filed: 10/30/2007
• Issued: 12/24/2013
• Est. Priority Date: 11/01/2006
• Status: Expired due to Fees

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Higuchi, Kenichi, Sawahashi, Mamoru
• Primary Examiner(s): Phan, Man
• Assistant Examiner(s): Kaur, Pamit
• Application Number:
  US12/447,609
• Publication Number:
  US 20090310549A1
• Time in Patent Office: 2,247 Days
• Field of Search: 370/335, 370/208, 370/336
• US Class Current: 370/335
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling

Abstract

A user terminal apparatus that transmits to a base station apparatus a pilot channel at least in uplink by a single carrier method is provided with a mapping portion that maps transmission data to a long block of a sub-frame composed of plural short blocks and plural of the long blocks, and maps a pilot channel for demodulating a data channel and a pilot channel for measuring a CQI to the short blocks in accordance with a transmission band and a transmission method provided by notification from the base station.

Claims

1. A user terminal apparatus that transmits to a base station apparatus a pilot channel at least in uplink by a single carrier method, the user terminal apparatus comprising:

a mapping portion that maps a transmission data to a long block of a sub-frame composed of plural short blocks and plural of the long blocks, and maps a pilot channel for demodulating a data channel and a pilot channel for measuring a CQI to the short blocks in accordance with a transmission band and a transmission method notified from the base station,

wherein the mapping portion maps the pilot channel for demodulating the data channel to the long block when a notified transmission bandwidth is less than a predetermined threshold value.

2. The user terminal apparatus as claimed in claim 1, wherein the mapping portion multiplexes the pilot channel for demodulating the data channel and the pilot channel for measuring the CQI to the same short block.

3. The user terminal apparatus as claimed in claim 2, wherein the long block has a transmission time longer than the short block, and

wherein the mapping portion maps the pilot channel for demodulating the data channel and the pilot channel for measuring the CQI to continuous short blocks.

4. The user terminal apparatus as claimed in claim 1, wherein the mapping portion maps the pilot channel for demodulating the data channel and the pilot channel for measuring the CQI to different short blocks.

5. The user terminal apparatus as claimed in claim 1, wherein the mapping portion maps the pilot channel for demodulating the data channel to a bandwidth larger than a bandwidth through which the data channel is transmitted.

6. The user terminal apparatus as claimed in claim 1, wherein the pilot channel for measuring the CQI is time division multiplexed in predetermined transmission intervals.

7. The user terminal apparatus as claimed in claim 1, wherein the pilot channel for measuring the CQI is code division multiplexed in predetermined transmission intervals.

8. The user terminal apparatus as claimed in claim 1, wherein the pilot channel for measuring the CQI is frequency division multiplexed in predetermined transmission intervals.

9. A user terminal apparatus that transmits to a base station a pilot channel at least in uplink by a single carrier method, the user terminal apparatus comprising:

a mapping portion that maps transmission data and a pilot channel for measuring a CQI to a long block of a sub-frame composed of plural short blocks and plural of the long blocks, and maps a pilot channel for demodulating a data channel to the short blocks in accordance with a transmission band and a transmission method notified from the base station,

wherein the mapping portion maps the pilot channel for demodulating the data channel to the long block when a notified transmission bandwidth is less than a predetermined threshold value.

10. The user terminal apparatus as claimed in claim 9, wherein the mapping portion multiplexes the transmission data and the pilot channel for measuring the CQI to the same long block.

11. The user terminal apparatus as claimed in claim 9, wherein the mapping portion multiplexes the transmission data and the pilot channel for measuring the CQI to different long blocks.

12. The user terminal apparatus as claimed in claim 9, wherein a TTI is composed of plural of the sub-frames, and

wherein the mapping portion maps the pilot channel for measuring the CQI so that a frequency band for transmitting the pilot channel for measuring the CQI within the TTI is changed.

13. The user terminal apparatus as claimed in claim 9, wherein a TTI is composed of plural of the sub-frames, and

wherein the mapping portion multiplexes the pilot channels every plural TTIs.

14. A base station apparatus that receives pilot channels from plural users at least in uplink by a single carrier method, wherein radio resources are assigned to corresponding user terminal apparatuses in accordance with corresponding pieces of information on channel qualities in the corresponding terminal apparatuses, the base station apparatus comprising:

a parameter determination portion that determines a parameter so that the pilot channels are orthogonal with each other among the user terminal apparatuses existing in a cell covered by the base station; and

a notifying portion that notifies each of the user terminal apparatuses of the parameter, such that each of the user terminal apparatuses maps, based on the parameter, transmission data and a pilot channel for measuring a CQI to a long block and maps a pilot channel for demodulating a data channel to a short block.

15. The base station apparatus as claimed in claim 14, wherein the parameter includes an identifier of a CAZAC code, a cyclic shift amount, and transmission band information.