Multicasting apparatus
First Claim
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1. Multicasting apparatus comprising:
- an encapsulator for encapsulating multicast data received from a remote source through a bidirectional network, the bidirectional network comprising a plurality of potential remote sources of multicast session data, to be sent, through a unidirectional network to user equipment, andan encapsulator controller operable to control the encapsulator so as to send a join message through the network for multicasting the data to the encapsulator from the source through the bidirectional network, wherein the join message includes an address corresponding to a single remote source selected from the plurality of potential remote sources, thereby creating a source specific multicast tree, the single remote source being the source of the multicast data, and wherein the encapsulator is operable to receive data from servers in different versions and to send the join message in a format dependent on the data version.
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Abstract
IP data is multicast from one or more servers (4) in sessions through a network (N) comprising a plurality of routers (R) in a multicast tree to transmission sites (S) of a DVB-T network, where the data is encapsulated by IPEs 28 and transmitted uni-directionally to mobile user equipment (UE). A controller (38) builds up a schedule of session data concerning sessions transmitted by the servers (4) and instructs the IPEs to send join messages to receive data for selected sessions. The join messages may include the address of the source and may be transmitted in good time before the start of the session.
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Citations
25 Claims
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1. Multicasting apparatus comprising:
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an encapsulator for encapsulating multicast data received from a remote source through a bidirectional network, the bidirectional network comprising a plurality of potential remote sources of multicast session data, to be sent, through a unidirectional network to user equipment, and an encapsulator controller operable to control the encapsulator so as to send a join message through the network for multicasting the data to the encapsulator from the source through the bidirectional network, wherein the join message includes an address corresponding to a single remote source selected from the plurality of potential remote sources, thereby creating a source specific multicast tree, the single remote source being the source of the multicast data, and wherein the encapsulator is operable to receive data from servers in different versions and to send the join message in a format dependent on the data version. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of multicasting comprising:
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operating an encapsulator to encapsulate multicast data received from a remote source through a bidirectional network, the bidirectional network comprising a plurality of potential remote sources of multicast session data, to be sent through a unidirectional network to user equipment, and controlling the encapsulator so as to send a join message through the network for multicasting the data to the encapsulator from the source through the network, wherein the join message includes an address corresponding to a single remote source selected from the plurality of potential remote sources, thereby creating a source specific multicast tree, the remote source being the source of the multicast data, wherein the encapsulator is operable to receive data from servers in different versions and to send the join message in a format dependent on the data version. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. Multicasting apparatus comprising:
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an encapsulator for encapsulating multicast data received in a stream from a single remote source through a bidirectional network comprising a plurality of potential remote sources of multicast session data, to be sent to user equipment, the single remote source being the source of the multicast data, and an encapsulator controller operable to send a join message through the network that includes an address corresponding to the address of the single remote source selected from the plurality of potential remote sources, thereby creating a source specific multicast tree so that the data can be multicast to the encapsulator from the source through the network, wherein the encapsulator is operable to receive data from servers in different versions and to send the join message in a format dependent on the data version.
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25. An apparatus, comprising:
- a mobile handset in communication with a multicasting apparatus, wherein the multicasting apparatus comprises;
an encapsulator for encapsulating multicast data received from a remote source through a bidirectional network, the bidirectional network comprising a plurality of potential remote sources of multicast session data, to be sent, through a unidirectional network to user equipment, andan encapsulator controller operable to control the encapsulator so as to send a join message through the network for multicasting the data to the encapsulator from the source through the bidirectional network, wherein the join message includes an address corresponding to a single remote source selected from the plurality of potential remote sources, thereby creating a source specific multicast tree, the single remote source being the source of the multicast data, and wherein the encapsulator is operable to receive data from servers in different versions and to send the join message in a format dependent on the data version.
- a mobile handset in communication with a multicasting apparatus, wherein the multicasting apparatus comprises;
Specification