Method for controlling an intersystem handover
AssigneeSiemens Aktiengesellschaft
InventorsMichael Faerber, Kenneth Isaacs, David Wynne Thomas, Jean-Michel Traynard
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Abstract
According to the invention, a reduced set of transport format combinations is signalled to a subscriber station which has established a link to a second radio communication system in a second signalling channel of said second radio communication system. The transport format indicator is then selected from the reduced set of transport format combinations and used to initiate a link transfer to the first signalling channel of a first radio communication system. A full set of transport format combinations is subsequently signalled to the subscriber station in the first signalling channel.
Claims7
A method of controlling an intersystem handover between first and second radio communication systems having first and second signaling channels, respectively, comprising:
- signaling to a subscriber station a reduced set of transport format combinations related to setting up a connection to the second radio communication system, in one of a dedicated second signaling channel and a radio channel of the second radio communication system;
- selecting a transport format indicator from the reduced set of transport format combinations for initiation of a handover to at least one of a first signaling channel and a data channel of the first second radio communication system;
- and
- signaling a complete set of transport format combinations to the subscriber station in the first signaling channel.
A communication system subscriber station for use in an intersystem handover between first and second radio communication systems having first and second signaling channels, respectively, comprising:
- a memory to store data of a reduced set of transport format combinations related to setting up a connection to the second radio communication system, in one of a dedicated second signaling channel and a radio channel of the second radio communication system;
- and
- a processor, coupled to said memory, to select a transport format indicator from the reduced set of transport format combinations for initiation of a handover to at least one of a first signaling channel and a data channel of the first second radio communication system;
- and to receive a complete set of transport format combinations transmitted to the subscriber station via the first signaling channel.
A communication system network station for use in an intersystem handover between first and second radio communication systems having first and second signaling channels, respectively, comprising:
- a memory to store data of a reduced set of transport format combinations related to setting up a connection to the second radio communication system, in one of a dedicated second signaling channel and a radio channel of the second radio communication system;
- and
- a processor, coupled to said memory, to select a transport format indicator from the reduced set of transport format combinations for initiation of a handover to at least one of a first signaling channel and a data channel of the first second radio communication system;
- and to receive transmit a complete set of transport format combinations to the subscriber station via the first signaling channel.
Dependencies are inferred from the claim text.