Base-station-assisted terminal-to-terminal connection setup
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorJacobus Cornelis Haartsen
Life of this patent
Estimating the term…
Abstract
A system and method for establishing ad hoc communication sessions between remote communication terminals is disclosed. A base station transmits a beacon signal including information about the identity and system clock of the base station. Remote terminals within range lock to the base station, synchronizing their system clocks with the base station's clock and setting their hop sequence and hop sequence phase based on information in the beacon signal. To establish an ad hoc communication session, a master terminal first establishes a link to the base station, which establishes a link to a desired slave terminal. The base terminal exchanges information between remote terminals that enables the master terminal to establish a direct communication session with a slave terminal.
Claims22
In a FH communication system, a method for establishing an ad-hoc communication session between first and second remote communication terminals, comprising the steps of:
- locking the remote terminals to a base station;
- establishing a communication link between the first remote communication terminal and the base station;
- transmitting from the first remote communication terminal to the base station information identifying the specific timing and frequency hop sequence of a page scanning process of the first remote communication terminal;
- establishing a communication link between the second remote communication terminal and the base station;
- and
- transmitting the identifying information from the base station to the second remote communication terminal, the identifying information being sufficient for beginning and ending the communication session autonomously between the first remote communication terminal and the second remote communication terminal at a future point in time without any further communication from the base station required.
A system for establishing an ad-hoc communication session between remote communication terminals, comprising:
- a base station adapted to transmit a beacon signal over a broadcast channel, the beacon signal including information identifying the base station and information indicating the base station's clock value;
- and
- at least first and second remote communication terminals adapted to receive the beacon signal and to establish a communication link with the base station, wherein the first remote communication terminal is adapted to transmit to the base station information identifying the timing and frequency hop sequence of a page scanning process of the first remote communication terminal, the base station is adapted to provide said identifying information to the second remote communication terminal, the identifying information being sufficient for beginning and ending the communication session autonomously between the first remote communication terminal and the second remote communication terminal at a future point in time without any further communication from the base station required, and the second remote communication terminal is adapted to establish the communication session—directly with the first remote communication terminal using the identifying information.
Dependencies are inferred from the claim text.