Patent ID: 8958441
Filing Date: 2015-02-17
Classification: H04L

Abstract:
1. A method of controlling source terminal transmissions, the method comprising: detecting a request signal at a source terminal in an in-band communication system; transmitting a synchronization signal from the source terminal upon detection of the request signal; repeatedly receiving alternating negative acknowledgment (NACK) signals and synchronization signals at the source terminal, wherein the alternating NACK signals and synchronization signals indicate successful reception of the transmitted synchronization signal from a destination terminal; repeatedly transmitting a user data segment from the source terminal using a first modulation scheme, wherein each transmission uses a different redundancy version; discontinuing transmission of the user data segment upon detection of a first received signal, wherein the first received signal indicates a successful reception of the user data segment from the destination terminal; and switching to a second modulation scheme if the source terminal receives a predetermined number of the NACK signals, wherein the NACK signals further indicate an unsuccessful reception of the user data segment from the destination terminal, and wherein the predetermined number is greater than one.