Mobile communication system, mobile station, base station, and control channel allocation method

• US 8,014,803 B2
• Filed: 11/10/2006
• Issued: 09/06/2011
• Est. Priority Date: 11/11/2005
• 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: Nakamura, Takehiro, Abeta, Sadayuki, Harada, Atsushi
• Primary Examiner(s): Pan; Yuwen
• Assistant Examiner(s): Nguyen; Hai
• Application Number:
  US12/092,927
• Publication Number:
  US 20090262655A1
• Time in Patent Office: 1,761 Days
• Field of Search: 455/509, 370/252
• US Class Current: 455/509
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A disclosed mobile station includes a storage unit configured to establish a correspondence between an identifier for a downlink Layer-1 control channel associated with a downlink data channel and a physical channel parameter for an uplink Layer-1 control channel and to store the identifier and the physical channel parameter; and a unit configured to determine the physical channel parameter based on the identifier and generate the uplink Layer-1 control channel. A disclosed base station includes a storage unit; a unit configured to measure reception quality based on a signal transmitted from the mobile station, select the physical channel parameter and generate the downlink Layer-1 control channel corresponding to the physical channel parameter; and a transmitting unit configured to transmit control information on the generated downlink Layer-1 control channel.

Claims

1. A mobile communication system including a mobile station and a base station, wherein:

the mobile station comprises

a storage unit configured to establish a correspondence between an identifier for a downlink Layer-1 control channel associated with a downlink data channel and a frequency block number for an uplink Layer-1 control channel and to store the identifier and the frequency block number;

a physical layer parameter determining unit configured to determine a physical channel parameter including the frequency block number for the uplink Layer-1 control channel based on the identifier;

an uplink Layer-1 control channel generating unit configured to generate the uplink Layer-1 control channel used for transmitting a result of decoding data on the data channel based on the determined physical channel parameter; and

a transmitting unit configured to transmit control information on the generated uplink Layer-1 control channel; and

the base station comprises

a storage unit configured to establish a correspondence between the identifier for the downlink Layer-1 control channel associated with the downlink data channel and the frequency block number for the uplink Layer-1 control channel and to store the identifier and the frequency block number;

a reception quality measuring unit configured to measure reception quality on an uplink propagation path based on a signal transmitted from the mobile station;

a downlink Layer-1 control channel generating unit configured to select the physical channel parameter including the frequency block number for the uplink Layer-1 control channel based on the reception quality on the uplink propagation path and generate the downlink Layer-1 control channel associated with the downlink data channel corresponding to the frequency block number; and

a transmitting unit configured to transmit control information on the generated downlink Layer-1 control channel.

2. The mobile communication system as claimed in claim 1, wherein:

the physical layer parameter determining unit determines the physical channel parameter for the uplink Layer-1 control channel to which a retransmission request feedback signal is mapped corresponding to the downlink Layer-1 control channel associated with the downlink data channel.

3. The mobile communication system as claimed in claim 1, wherein:

the storage unit establishes a correspondence between a channel number for the downlink Layer-1 control channel associated with the downlink data channel and the frequency block number for the uplink Layer-1 control channel and stores the channel number and the frequency block number,

the physical layer parameter determining unit determines the frequency block number for the uplink Layer-1 control channel to which a retransmission request feedback signal is mapped corresponding to the downlink Layer-1 control channel associated with the downlink data channel, and

the downlink Layer-1 control channel generating unit selects the frequency block number for the uplink Layer-1 control channel based on the reception quality on the uplink propagation path and generates the downlink Layer-1 control channel associated with the downlink data channel corresponding to the frequency block number.

4. The mobile communication system as claimed in claim 1, wherein:

the physical layer parameter determining unit determines the physical channel parameter corresponding to the identifier by means of a predetermined function.

5. A mobile station, comprising:

a storage unit configured to establish a correspondence between an identifier for a downlink Layer-1 control channel associated with a downlink data channel and a frequency block number for an uplink Layer-1 control channel and to store the identifier and the frequency block number;

a physical layer parameter determining unit configured to determine a physical channel parameter including the frequency block number for the uplink Layer-1 control channel based on the identifier;

an uplink Layer-1 control channel generating unit configured to generate the uplink Layer-1 control channel used for transmitting a result of decoding data on the data channel based on the determined physical channel parameter; and

a transmitting unit configured to transmit control information on the generated uplink Layer-1 control channel.

6. A base station, comprising:

a storage unit configured to establish a correspondence between an identifier for a downlink Layer-1 control channel associated with a downlink data channel and a frequency block number for an uplink Layer-1 control channel and to store the identifier and the frequency block number;

a reception quality measuring unit configured to measure reception quality on an uplink propagation path based on a signal transmitted from a mobile station;

a downlink Layer-1 control channel generating unit configured to select a physical channel parameter including the frequency block number for the uplink Layer-1 control channel based on the reception quality on the uplink propagation path and generate the downlink Layer-1 control channel associated with the downlink data channel corresponding to the frequency block number; and

a transmitting unit configured to transmit control information on the generated downlink Layer-1 control channel.

7. A control channel allocating method, comprising the steps of:

a) measuring, by a base station, reception quality on an uplink propagation path based on a signal transmitted from a mobile station;

b) selecting, by the base station, a physical channel parameter including a frequency block number for an uplink Layer-1 control channel based on the reception quality on the uplink propagation path and generating a downlink Layer-1 control channel associated with a downlink data channel corresponding to the frequency block number;

c) transmitting by the base station, control information on the generated downlink Layer-1 control channel;

d) receiving, by the mobile station, the control information on the downlink Layer-1 control channel associated with the downlink data channel;

e) determining, by the mobile station, the physical channel parameter including the frequency block number for the uplink Layer-1 control channel corresponding to an identifier for the downlink Layer-1 control channel associated with the downlink data channel based on a predetermined correspondence between the identifier and the frequency block number;

f) generating, by the mobile station, the uplink Layer-1 control channel used for transmitting a result of decoding data on the data channel based on the determined physical channel parameter; and

g) transmitting, by the mobile station, control information on the generated uplink Layer-1 control channel.

8. The control channel allocating method as claimed in claim 7, wherein:

the step of e) comprises determining the physical channel parameter for the uplink Layer-1 control channel to which a retransmission request feedback signal is mapped corresponding to the downlink Layer-1 control channel associated with the downlink data channel.

9. The control channel allocating method as claimed in claim 7, wherein:

the step of e) comprises determining the frequency block number for the uplink Layer-1 control channel to which a retransmission request feedback signal is mapped corresponding to the downlink Layer-1 control channel associated with the downlink data channel, and

the step of b) comprises selecting the frequency block number for the uplink Layer-1 control channel based on the reception quality on the uplink propagation path and generating the downlink Layer-1 control channel associated with the downlink data channel corresponding to the frequency block number.

10. The control channel allocating method as claimed in claim 7, wherein:

the step of e) comprises determining the physical channel parameter corresponding to the identifier by means of a predetermined function.