Transmission of mbms in an ofdm communication system
AssigneeNEC Corporation
InventorThanh BUI
Life of this patent
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Abstract
The invention provides for a method of identifying a cyclic prefix to UEs in an OFDM communication system. The cyclic prefix has a dynamically variable length. The method includes, within an OFDM cell, transmitting MCCH scheduling information in a system information block in an OFDM broadcast channel, and using the MCCH scheduling information to receive the MCCH, wherein the MCCH contains MTCH scheduling information to indicate to the UE which sub-frame carries MTCH.
Claims31
A method of orthogonal frequency division multiplexing (OFDM) data transmission in a sub-frame of m OFDM symbols in which the cyclic prefix length of each symbol can vary dynamically, the method including:
- including a normal-length cyclic prefix in a first n OFDM symbols in a sub-frame, n being an integer having a value less m, and including an extended-length cyclic prefix in the remaining m-n OFDM symbols, wherein MBMS signals are transmitted in the remaining m-n OFDM symbols.
A method implemented in a base station of orthogonal frequency division multiplexing (OFDM) data transmission in a sub-frame of m OFDM symbols, comprising:
- transmitting a default cyclic prefix for each of first one or more OFDM symbols in the sub-frame, the number of said first one or more OFDM symbols being integer n having a value less than m;
- and
- transmitting an extended-length cyclic prefix for remaining m-n OFDM symbols,
- wherein a multimedia broadcast multicast service (MBMS) signal is transmitted in the remaining m-n OFDM symbols.
A method implemented in a user equipment of orthogonal frequency division multiplexing (OFDM) data reception in a sub-frame of m OFDM symbols, comprising:
- receiving a default cyclic prefix for each of first one or more OFDM symbols in the sub-frame, the number of said first one or more OFDM symbols being integer n having a value less than m,
- wherein the sub-frame includes an extended-length cyclic prefix for remaining m-n OFDM symbols, and
- wherein a multimedia broadcast multicast service (MBMS) signal is transmitted in the remaining m-n OFDM symbols.
A base station for orthogonal frequency division multiplexing (OFDM) data transmission in a sub-frame of m OFDM symbols, comprising:
- a transmitter to transmit a non-multimedia broadcast multicast service (non-MBMS) signal in first one or more OFDM symbols in the sub-frame, the number of said first one or more OFDM symbols being integer n having a value less than m, and an MBMS signal in remaining m-n OFDM symbols,
- wherein a default cyclic prefix is transmitted for the non-MBMS signal and an extended-length cyclic prefix is transmitted for the MBMS signal.
A user equipment orthogonal frequency division multiplexing (OFDM) data reception in a sub-frame of m OFDM symbols, comprising:
- a receiver to receive a non-multimedia broadcast multicast service (non-MBMS) signal in first one or more OFDM symbols in the sub-frame, the number of said first one or more OFDM symbols being integer n having a value less than m,
- wherein an MBMS signal is transmitted in remaining m-n OFDM symbols,
- wherein a default cyclic prefix is transmitted for the non-MBMS signal and an extended-length cyclic prefix is transmitted for the MBMS signal.
Dependencies are inferred from the claim text.