Patent ID: 7895343
Filing Date: 2011-02-22
Classification: H04L,H04W

Abstract:
1. A method in a data communication system wherein data is transmitted by use of at least two protocols that are capable of re-transmission of data, said protocols being implemented in nodes of said data communication system, the implementation of a protocol implemented in a transmitting node being a transmitting protocol entity and the implementation of a protocol in a receiving node being a receiving protocol entity, one of said at least two protocols capable of re-transmission of data being a higher layer protocol than another of said at least two protocols, said another protocol therefore being a lower layer protocol, the method comprising: transmitting, from a higher layer transmitting protocol entity, a protocol data unit to a lower layer transmitting protocol entity; receiving, in said higher layer transmitting protocol entity, a transmission result from said lower layer transmitting protocol entity, said transmission result reporting the result of the transmission of said protocol data unit by said lower layer transmitting protocol entity; and deciding, responsive to said transmission result, whether the higher layer transmitting protocol entity should re-provide said lower layer transmitting protocol entity with said protocol data unit, wherein the higher layer transmitting protocol entity does not re-provide the protocol data unit to the lower layer transmitting protocol entity until after it has received the transmission result.