US 8,985,451 B2 · Communication apparatus, communication method, and program

Abstract

A communication apparatus performing communication in a noncontact manner is provided. The communication apparatus includes a transmission control unit configured to transmit a command; a timeout period checking unit configured to check whether a timeout period during which a response to the command is waited for has elapsed; a retransmission control unit configured to retransmit the command only after the timeout period has elapsed; an error checking unit configured to check whether data received within the timeout period has an error; and a processing unit configured to regard the data received within the timeout period as a correct response to the command if the data does not have an error and perform a process in accordance with the response. If the data received within the timeout period has an error, the retransmission control unit does not retransmit the command and the timeout period checking unit continues to check whether the timeout period has elapsed.

Claims6

Dependent claims

A communication apparatus for performing communication in a noncontact manner, the communication apparatus comprising:

a processor;
and
a memory device storing instructions which when executed by the processor, cause the processor to:
(a) wirelessly transmit a command packet to an IC card, the command packet:
(i) including a first data indicative of a timeout period;
and
(ii) being associated with a designated response packet which includes a second data which is determined based on the first data;
(b) start the timeout period during which a receiver in the communication apparatus is enabled to receive data;
(c) determine whether the timeout period has elapsed;
(d) retransmit the command packet only after the timeout period has elapsed;
(e) determine whether data received within the timeout period includes:
(i) an error;
and
(ii) the second data;
(f) in response to a first determination that the data received within the timeout period:
(i) does not include the error;
and (ii) includes the second data,
using the designated response packet, perform a process;
and
(g) in response to a second determination that the data received within the timeout period:
(i) includes the error;
and (ii) the timeout period has not elapsed:
(A) cause the command packet to not be retransmitted;
and
(B) continue to determine whether the timeout period has elapsed without restarting the timeout period.

22 more elements

Dependencies are inferred from the claim text.

Communication apparatus, communication method, and program

Life of this patent

Communication apparatus, communication method, and program

Life of this patent

Abstract

Claims6