Methods and systems for transmission of orthogonal frequency division multiplexed symbols
First Claim
1. A method comprising:
- arranging in a frame a plurality of OFDM symbols to support OFDM symbol transmission from a single transmitter in a unicast mode portion of the frame and a broadcast mode portion of the frame;
transmitting the frame in a sequence of frames in which each frame has a same frame duration.
3 Assignments
0 Petitions
Accused Products
Abstract
In some embodiments of the present invention there is provided a frame structure for transmitting an integer number of OFDM symbols in which some of the OFDM symbols are to be transmitted in a unicast format and some of the OFDM symbols are to be transmitted in a broadcast format. The frame structure includes partitioning of a frame into at least two portions to accommodate both unicast and broadcast modes in the frame. The frame structure is used for transmitting multiple frames in a serial manner from at least one transmitter. The unicast mode supports transmission of OFDM symbols from a single transmitter to a single receiver. The broadcast mode supports transmission of OFDM symbols from multiple transmitters to all receivers within range of the multiple transmitters. The multicast mode supports transmission of OFDM symbols from multiple transmitters to multiple receivers within range of the multiple transmitters.
105 Citations
20 Claims
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1. A method comprising:
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arranging in a frame a plurality of OFDM symbols to support OFDM symbol transmission from a single transmitter in a unicast mode portion of the frame and a broadcast mode portion of the frame; transmitting the frame in a sequence of frames in which each frame has a same frame duration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for receiving a frame comprising a plurality of OFDM symbols, the method comprising:
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accessing a communication network sending the frame; receiving information from which a frame structure can be determined; receiving a plurality of OFDM symbols according to the frame structure, wherein the frame structure comprises a unicast mode portion and a broadcast mode portion. - View Dependent Claims (14)
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15. A communication network comprising:
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a plurality of telecommunication cells each comprising at least one transmitter and divided into at least two portions; at least one sub-network comprised of portions of at least two adjacent telecommunication cells of the plurality of telecommunication cells, the at least one sub-network being supported by one of;
a transmitter of one of the at least two adjacent telecommunication cells for unicast mode transmissions, a transmitter of one of the at least two adjacent telecommunication cells for single-cell broadcast mode transmissions and transmitters of all of the at least two adjacent telecommunication cells for broadcast transmissions,wherein the transmitters of the at least one sub-network are adapted to transmit OFDM symbols in both unicast mode and broadcast mode in a same transmission frame structure. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification