Method, system, network entity, and end-user terminal for controlling a handover of a cellular terminal
First Claim
1. A method for controlling a handover of a terminal between a digital generally bi-directional communications service and a digital generally unidirectional communications service, comprising the steps of:
- listening to available downlink radio signals, selecting according to a predetermined criteria between the available downlink radio signals, and changing to another available downlink radio signal for at least in part performing said handover.
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Accused Products
Abstract
A method, a system and an end-user terminal for providing a handover between a digital unidirectional data communication domain and a digital bi-directional data communication domain is disclosed. Exemplary domains can be a broadcast network such as IP over DVB (Digital Video Broadcasting) network, or a broadcast mode, in further examples IP over DVB-T (Terrestrial DVB) or alternatively referred to as IPDC (IP Datacast), the 3G (The Third Generation for Mobile Communication) network, in further examples UTRAN (UMTS Terrestrial Radio Access Node). The embodiments apply measurement signalling structure of the Inter-system handover of ULMTS (Universal Mobile Telephone System) to control the handover. The measurements of the cell is extended to contain digital unidirectiona communications domain cells such as IP over DVB cells, as well as apply these cells to perform the handover. The fact that one of the network is principally delivering one (unidirectional) leads to a partial handover where the downlink data of the bi-directional network is applied in the handover. The unidirectional communications domain is already in a downlink transmission which knits the handover with the downlink of the bi-directional domain.
18 Citations
24 Claims
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1. A method for controlling a handover of a terminal between a digital generally bi-directional communications service and a digital generally unidirectional communications service, comprising the steps of:
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listening to available downlink radio signals, selecting according to a predetermined criteria between the available downlink radio signals, and changing to another available downlink radio signal for at least in part performing said handover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for performing a handover of a service from a cellular mobile data communication domain to a digital broadband data communication domain, the method comprising the steps of:
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measuring received radio signals of said domains at a terminal, sending a measurement report of said received radio signals to said cellular mobile data communication domain, reserving resources of the digital broadband data communication domain by communicating between the cellular data communication domain and the digital broadband data communication domain, sending a handover command to said terminal from the cellular mobile data communication domain, and sending a confirmation from said terminal to the digital broadband data communication domain for moving the service delivered via the cellular mobile data communication domain to the digital broadband data communication domain. - View Dependent Claims (19)
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20. A method for performing a handover of a service from a digital broadband data communication domain to a cellular mobile data communication domain, the method comprising the step of:
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measuring received radio signals of said domains at a terminal, sending a measurement report of said received radio signals to said digital broadband data communication domain, reserving resources of the cellular mobile data communication domain by communicating between the digital broadband data communication domain and the cellular mobile data communication domain, sending a handover command to said terminal from the digital broadband data communication domain, and sending a confirmation from said terminal to the cellular mobile data communication domain for moving the service delivered via the digital broadband data communication domain to the cellular mobile data communication domain. - View Dependent Claims (21)
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22. A system for controlling a handover of a terminal between a digital generally bi-directional communications service and a digital generally unidirectional communications service, comprising:
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means for listening available downlink radio signals, means for selecting according to a predetermined criteria between the available downlink radio signals, and means for changing to another available downlink radio signal for at least in part performing said handover.
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23. A user terminal for adapting a handover of the terminal between a digital generally bi-directional communications service and a digital generally unidirectional communications service, comprising:
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a receiver for measuring available downlink radio signals, a transceiver for transmitting the measurements, said receiver further for receiving a handover command for changing to another available downlink radio signal, and said transceiver further for transmitting a confirmation for at least in part performing said handover.
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24. A network entity for controlling a handover of a service between a digital generally bi-directional communications domain and a digital generally unidirectional communications domain, comprising:
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means for receiving a measurement about available downlink radio signals, means for selecting according to a predetermined criteria between the available radio signals, and means for changing to another available downlink radio signal for at least in part performing said handover.
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Specification