Transfer of voice messages
First Claim
1. A method of bi-directional transferring voice messages in a communication network having a public telephone network and a batch type packet-switched narrow-band radio data network for transferring voice messages in both directions between the public telephone network and terminals of the packet-switched narrow-band radio data network and for transferring voice messages in both directions between terminals of the packet-switched narrow-band radio data network, the method comprising the steps of:
- converting an entire voice message from analog form to digital form to create a digitized voice message;
compressing the digitized voice message to create a compressed message;
placing the compressed message in at least one data packet;
supplementing a data packet with an address of an intended receiver of the voice message and an identification that indicates that the data packet contains a compressed voice message;
placing the data packet in a queue for transfer by the packet-switched narrow band radio data network in a batch;
transferring the data packet via the packet-switched narrow-band radio data network in a batch;
combining data packets after transfer to the receiver so that the compressed message is reassembled;
expanding and storing the reassembled message; and
converting the expanded and reassembled message from digital form to analog form, whereby the voice message is reproduced.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and a communication network including a public telephone network and a narrow band radio network for packet-switching of data between stationary and mobile terminals. Voice messages may be bi-directionally transferred between the public telephone network and the terminals by a gateway arranged to connect the public telephone network and the packet-switched narrow band radio data network. The voice messages are converted in the gateway or terminals into digital form and compressed, and then transferred to the packet-switched narrow band radio data network. The terminals and the gateway are provided with a device in which the compressed voice messages, transferred through the packet-switched network, are expanded and, after conversion to analog form, reproduced.
111 Citations
14 Claims
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1. A method of bi-directional transferring voice messages in a communication network having a public telephone network and a batch type packet-switched narrow-band radio data network for transferring voice messages in both directions between the public telephone network and terminals of the packet-switched narrow-band radio data network and for transferring voice messages in both directions between terminals of the packet-switched narrow-band radio data network, the method comprising the steps of:
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converting an entire voice message from analog form to digital form to create a digitized voice message; compressing the digitized voice message to create a compressed message; placing the compressed message in at least one data packet; supplementing a data packet with an address of an intended receiver of the voice message and an identification that indicates that the data packet contains a compressed voice message; placing the data packet in a queue for transfer by the packet-switched narrow band radio data network in a batch; transferring the data packet via the packet-switched narrow-band radio data network in a batch; combining data packets after transfer to the receiver so that the compressed message is reassembled; expanding and storing the reassembled message; and converting the expanded and reassembled message from digital form to analog form, whereby the voice message is reproduced. - View Dependent Claims (2, 3, 4)
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5. A communication network, for a public telephone network and a batch type packet-switched narrow-band radio data network for packet-switching of data between stationary and mobile terminals, for bi-directionally transferring voice messages between terminals of the packet-switched narrow-band radio data network and between the public telephone network and terminals of the packet-switched narrow-band radio data network, comprising:
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interfacing means for connecting the public telephone network and the packet-switched narrow-band radio data network, wherein the interfacing means comprises; means for converting an entire first voice message received from the public telephone network into a digitized first voice message; means for subsequently compressing the digitized first voice message to create a compressed first voice message; means for placing the compressed first voice message in at least one first data packet; means for transferring first data packets to the packet-switched narrow-band radio data network in a first batch; means for combining a second batch of data packets received in a batch from the packet-switched narrow-band radio data network to reassemble a compressed second voice message; means for subsequently expanding the compressed second voice message to create a digitized second voice message; means for convening the digitized second voice message into an analog second voice message; and means for transferring the analog second voice message to the public telephone network; and a plurality of terminals, each terminal comprising; means for combining the first or second batch of data packets received in a batch from the packet-switched narrow-band radio data network to restore a compressed first or second voice message; means for subsequently expanding the compressed first or second voice message to create a digitized first or second voice message; means for converting the digitized first or second voice message into an analog first or second voice message; means for converting a second voice message received from an input device;
into a digitized second voice message;means for subsequently compressing the digitized second voice message to create a compressed second voice message; means for placing the compressed second voice message in at least one second data packet; and means for transferring second data packets to the packet-switched narrow-band radio data network in a second batch. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification