Communication apparatus and method for reconfiguring communication apparatus
Digital signal processing section 103 has reconfigurable device 131 , and reconfigurable device 131 configures decoding section 133 and coding section 134 by programming data. Decoding section 133 acquires synchronization from a signal output from reception section 121 , and demodulates and decodes the signal. CPU 105 downloads programming data of another radio communication system to store in storage section 106 via general bus 104 . Further, CPU 105 reads out the stored programming data, and reconfigures reconfigurable device 131 . Storage section 106 stores the programming data.
1. A communication apparatus comprising:
a radio section that receives a radio signal to convert into a baseband signal;
a baseband signal processor that executes processing that is common among a plurality of radio communication systems and processing that is different among the plurality of radio communication systems on the baseband signal; and
a reconfiguring section that reconfigures only a portion in the baseband signal processor that executes the processing that is different among the plurality of radio communication systems, based on programming data of a new radio communication system upon switching of radio communication systems, and halts at least one of a clock and a power supply in an unused portion in the baseband signal processor.
2. The communication apparatus according to claim 1 , wherein the portion in the baseband signal processor that executes the processing that is different among the plurality of radio communication systems comprises:
a synchronization section that establishes synchronization of communications, and
a compensator that corrects amplitude or a phase of the baseband signal.
3. The communication apparatus according to claim 2 , wherein:
the portion in the baseband signal processor that executes the processing that is different among the plurality of radio communication systems comprises an FFT section that executes orthogonal transform on the baseband signal, and
the reconfiguring section reconfigures a processing portion of the FFT section, the processing portion varying with the number of items of data subjected to the orthogonal transform.
4. The communication apparatus according to claim 3 , wherein the synchronization section determines synchronization timing using a baseband signal obtained by demodulating a signal mapped on a subcarrier by the orthogonal transform in the FFT section.
5. The communication apparatus according to claim 2 , wherein:
the portion in the baseband signal processor that executes the processing that is different among the plurality of radio communication systems comprises a correlation section that executes correlation processing of the baseband signal, and
the reconfiguring section reconfigures a combination of operations in the correlation section.
6. The communication apparatus according to claim 5 , wherein the synchronization section determines synchronization timing using a result of the correlation processing of the baseband signal in the correlation section.
7. The communication apparatus according to claim 1 , wherein:
the portion in the baseband signal processor that executes the processing that is different among the plurality of radio communication systems comprises an error controller which performs error correction of the baseband signal or a retransmission request when the baseband signal has an error, and
the reconfiguring section reconfigures a processing portion of the error controller, the processing portion different among a plurality of error correction systems or error detection systems.
8. The communication apparatus according to claim 7 , further comprising:
a storage section that stores a result of processing of the error controller, wherein
the reconfiguring section reconfigures connection with an output destination of content stored in the storage section.
9. The communication apparatus according to claim 1 , wherein the reconfiguring section acquires information required for reconfiguration from the radio signal received in the radio section to reconfigure the portion in baseband signal processor that executes the processing that is different among the plurality of radio communication systems.
10. The communication apparatus according to claim 1 , further comprising:
an interface section that reads out data stored in the storage section, wherein
the reconfiguring section acquires information required for reconfiguration from the storage section via the interface section to reconfigure the portion in the baseband signal processor that executes the processing that is different among the plurality of radio communication systems.
11. The communication apparatus according to claim 1 , further comprising:
an interface section that receives information required for reconfiguration, in wired connection, wherein
the reconfiguring section acquires the information required for reconfiguration from the storage section via the interface section to reconfigure the portion in the baseband signal processor that executes the processing that is different among the plurality of radio communication systems.
12. The communication apparatus according to claim 1 , further comprising:
an interface section that receives information required for reconfiguration, in specific power-saving radio communications, wherein
the reconfiguring section acquires the information required for reconfiguration from the storage section via the interface section to reconfigure the portion in the baseband signal processor that executes the processing that is different among the plurality of radio communication systems.
13. The communication apparatus according to claim 1 , further comprising:
a radio-section communication section that relays communications between the radio section and the baseband signal processor; and
a CPU communication section that relays communications between the baseband signal processor and the reconfiguring section, wherein
the baseband signal processor is detachable.
14. The communication apparatus according to claim 13 , further comprising:
an attaching/detaching detector that detects attaching/detaching of the baseband signal processor; and
a first power source supplier which supplies power to the radio section, and when detaching of the baseband signal processor is detected, halts supply of the power to the radio section.
15. The communication apparatus according to claim 13 , further comprising:
a radio communication section that performs radio communications;
an application section that performs display, replay and edition of data of image, music and mail; and
a connector that relays communications between the radio communication section and the application section, wherein:
the radio communication section and the application section are separable,
the radio communication section comprises:
a radio-section communication section that relays communications between the radio section and the baseband signal processor,
a CPU communication section that relays communications between the detachable baseband signal processor and the reconfiguring section,
a first CPU, and
an application communication section that relays communications with the application section, and
the application section comprises:
a call control communication section that relays communications with the radio communication section,
a separation detector that detects separation of the radio communication section, and
a second CPU that halts communications to the radio communication section when separation of the radio communication section is detected.
16. The communication apparatus according to claim 13 , further comprising:
a radio communication section that performs radio communications;
an application section that performs display, replay and edition of data of image, music and mail; and
a connector that relays communications between the radio communication section and the application section, wherein:
the radio communication section and the application section are separable, the radio communication section comprises:
a radio-section communication section that relays communications between the radio section and the baseband signal processor,
a CPU communication section that relays communications between the detachable baseband signal processor and the reconfiguring section,
a first CPU,
an attaching/detaching detector that detects attaching/detaching of the second baseband signal processor,
a first power source supplier which supplies power to the radio section, and when detaching of the baseband signal processor is detected, halts supply of the power to the radio section, and
an application communication section that relays communications with the application section, and
the application section comprises:
a call control communication section that relays communications with the radio communication section,
a separation detector that detects separation of the radio communication section,
a second power source supplier which supplies power to the radio communication section, and when separation of the radio communication section is detected, halts supply of the power to the radio section, and
a second CPU that halts communications to the radio communication section when separation of the radio communication section is detected.
17. A reconfiguration method of a communication apparatus comprising:
a radio section that receives a radio signal to convert into a baseband signal;
a baseband signal processor that executes processing that is common among a plurality of radio communication systems and processing that is different among the plurality of radio communication systems on the baseband signal; and
the reconfiguration method comprising:
downloading programming data of a second radio communication system in order to perform handover for switching to the second radio communication system during communication in a first radio communication system;
reconfiguring a portion in the baseband signal processor that executes processing that is different among the plurality of radio communication systems, based on the programming data; and
halting at least one of a clock and a power supply in an unused portion in the baseband signal processor.