초록 ▼

A high layer protocol organizes Unidirectional Streaming Services (USS) data into frames and said data is transmitted to the wireless user's terminal. The USS data is not delivered until a criteria is satisfied, e.g., the receive buffer is filled to an appropriate value. After the USS data is receiv

A high layer protocol organizes Unidirectional Streaming Services (USS) data into frames and said data is transmitted to the wireless user's terminal. The USS data is not delivered until a criteria is satisfied, e.g., the receive buffer is filled to an appropriate value. After the USS data is received, the receiver verifies the received frames. If an error is detected a message is sent from the wireless terminal to the server (providing the unidirectional streaming service) requesting retransmission of the corrupted frame. This is a form of ARQ protocol. If the retransmitted frame arrives prior to the time that frame needs to be delivered, the corrupted frame is replaced by the retransmitted frame. Otherwise, if the retransmitted frame is not received prior to the time that frame needs to be delivered, the corrupted frame is reconstructed. Any retransmitted frame which arrives too late is discarded. An additional benefit of the present invention is that since the frames are buffered prior to delivery, interpolation, as opposed to extrapolation, can be used to improve the reconstruction quality of the corrupted frame. This optional feature of the invention uses both the preceding and succeeding frames, which are available in the buffer, to provide a better estimate of the corrupted frame.

대표청구항 ▼

1. A method of delivering unidirectional streaming services (USS) data transmitted via a wireless network, said method comprising the steps of:a) storing received USS frames in a receive buffer; b) testing received USS frames for errors; c) replacing, USS frames received with detected errors prior t

1. A method of delivering unidirectional streaming services (USS) data transmitted via a wireless network, said method comprising the steps of:a) storing received USS frames in a receive buffer; b) testing received USS frames for errors; c) replacing, USS frames received with detected errors prior to delivery; and d) delivering said USS frames from said buffer at a constant rate responsive to a delay criteria being satisfied; wherein said replacing step comprises: i) requesting retransmission of said USS frames received with detected errors; ii) replacing the USS frames received with detected errors with retransmitted frames provided the retransmitted frames are received without errors in time to be delivered at said constant rate; and iii) if said retransmitted frames are not received without errors in time to be delivered at said constant rate, reconstructing the USS frames received with detected errors and discarding any subsequently received retransmission of said frames.