WIRELESS COMMUNICATION BASE STATION DEVICE, WIRELESS COMMUNICATION TERMINAL DEVICE, AND CHANNEL ALLOCATION METHOD

• US 20110134874A1
• Filed: 08/07/2009
• Published: 06/09/2011
• Est. Priority Date: 08/08/2008
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Imamura, Daichi, Nishio, Akihiko, Nakao, Seigo
• Granted Patent: US 8,446,870 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Disclosed is a base station in which the frequency usage efficiency can be improved when the communication bandwidths are asymmetric in the uplink line and the downlink line. A base station (200) can communicate by using a plurality of downlink unit bands and a smaller number of uplink unit bands. A control unit (201) allocates uplink resource allocation information and downlink resource allocation information to a PDCCH which is arranged in each of the plurality of downlink unit bands, and allocates a response signal to the uplink line data to a PHICH which is arranged in the same number of downlink unit bands from the plurality of downlink unit bands as there are uplink unit bands. A transmit RF unit (212) transmits the resource allocation information or the response signal.

Claims

1-13. -13. (canceled)

14. A radio communication base station apparatus that can perform communication using a plurality of downlink component bands and a plurality of uplink component bands, in which the number of uplink component bands is smaller than the number of the downlink component bands, the apparatus comprising:

a control section that assigns resource allocation information to a first channel placed in each of the plurality of downlink component bands and assigns a response signal for uplink data to a second channel placed in a same number of partial downlink component bands as the uplink component bands; and

a transmitting section that transmits the resource allocation information or the response signal.

15. The radio communication base station apparatus according to claim 14, wherein the control section assigns the resource allocation information of uplink data and the resource allocation information of downlink data to the first channel placed in the partial downlink component bands, and assigns the resource allocation information of downlink data to the first channel placed in downlink component bands other than the partial downlink component bands.

16. The radio communication base station apparatus according to claim 15, further comprising an inserting section that equalizes the number of bits of the resource allocation information of uplink data and the number of bits of the resource allocation information of downlink data by inserting a redundant bit to the resource allocation information assigned to the first channel placed in the partial downlink component bands.

17. The radio communication base station apparatus according to claim 14, wherein the control section assigns the resource allocation information of uplink data and the resource allocation information of downlink data to the first channel placed in each of the plurality of downlink component bands.

18. The radio communication base station apparatus according to claim 14, wherein the partial downlink component bands are downlink component bands allocating a synchronization channel and broadcast channel.

19. The radio communication base station apparatus according to claim 14, wherein the partial downlink component bands are downlink component bands in which a terminal supporting a long term evolution system and a terminal supporting a long-term-evolution-advanced system both can perform communication.

20. The radio base station apparatus according to claim 14, wherein an amount of resources of a second channel placed in the partial downlink component band is larger than an amount of resources of a second channel placed in downlink component bands other than the partial downlink component bands.

21. A radio communication terminal apparatus that can perform communication using a plurality of downlink component bands and a plurality of uplink component bands, in which the number of uplink component bands is smaller than the number of the downlink component bands, the apparatus comprising:

an obtaining section that obtains resource allocation information for the radio communication terminal apparatus assigned to a first channel placed in each of the plurality of downlink component bands;

a mapping section that maps uplink data on the uplink component bands according to the resource allocation information of uplink data; and

an extracting section that extracts a response signal for the uplink data from a second channel placed in a same number of partial downlink component bands as the uplink component bands.

22. The radio communication terminal apparatus according to claim 21, wherein the obtaining section:

obtains the resource allocation information of downlink data from each of the plurality of downlink component bands and obtains the resource allocation information of uplink data from the partial downlink component bands;

in the partial downlink component bands among the plurality of downlink component bands, as a size of the resource allocation information, determines a larger size between a size of the resource allocation information of downlink data determined from a bandwidth of the partial downlink component bands and a size of the resource allocation information of uplink data determined from a bandwidth of the uplink component bands; and

in downlink component bands other than the partial downlink component bands among the plurality of downlink component bands, as a size of the resource allocation information, determines a size of the resource allocation information of downlink data determined from a bandwidth of the downlink component bands other than the partial downlink component bands.

23. The radio communication terminal apparatus according to claim 21, wherein the mapping section performs the mapping according to the resource allocation information of uplink data assigned to the first channel placed in the partial downlink component band.

24. The radio communication terminal apparatus according to claim 21, wherein the mapping section performs the mapping according to the resource allocation information of uplink data assigned to the first channel placed in each of the plurality of downlink component bands.

25. The radio communication terminal apparatus according to claim 21, wherein the partial downlink component bands are downlink component bands in which a broadcast channel to broadcast information related to the uplink component bands on which the uplink data is mapped, is placed.

26. A channel assignment method of assigning a second channel to a response signal for uplink data in a radio communication base station apparatus that can perform communication using a plurality of downlink component bands and a plurality of uplink component bands, in which the number of uplink component bands is smaller than the number of the downlink component bands, the method comprising:

assigning resource allocation information to a first channel placed in each of the plurality of downlink component bands; and

assigning a response signal for the uplink data to a second channel placed in a same number of partial downlink component bands as the uplink component bands, among the plurality of downlink component bands.

27. A response signal extraction method of extracting a response signal for uplink data from a second channel in a radio communication terminal apparatus that can perform communication using a plurality of downlink component bands and a plurality of uplink component bands, in which the number of uplink component bands is smaller than the number of the downlink component bands, the method comprising:

obtaining resource allocation information for the radio communication terminal apparatus assigned to a first channel placed in each of the plurality of downlink component bands;

mapping uplink data on the uplink component bands according to the resource allocation information of uplink data; and

extracting a response signal for the uplink data from a second channel placed in a same number of partial downlink component bands as the uplink component bands among the plurality of downlink component bands.