Method and apparatus for managing polling requests in data communications

The invention claims a analyzing group or more data unit in block, which is not in the independent data unit for improving data communication the reliability. For example, wherein the transmitter hopes or lower sending a searching request a receiver, possibly more data unit can be used as a group and are. The are set searching for receiving data unit are arranged to interface for searching one request. When the receiver receives the group of data unit, at least one of the data unit and group receiving indication with one request searching, a receiver on state information of sending a request to the. The region; and group of data units' searching receiving indication with one request searching, and a receiver only by the state information for time request.