LEGACY-COMPLIANT BURST FORMATS FOR MULTIPLE USERS REUSING ONE SLOT (MUROS) OPERATION
First Claim
1. A base station, comprising:
- a processor configured to generate a first four-bit tail sequence to be decoded to a first length and a second four-bit tail sequence to be decoded to a second length; and
a transmitter configured to transmit a first burst including the first tail sequence to a first wireless transmit/receive unit (WTRU) on a first Orthogonal Sub-channels (OSC) sub-channel on a timeslot, and to transmit a second burst including the second tail sequence to a second WTRU on a second OSC sub-channel on the timeslot.
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Accused Products
Abstract
A burst may include a three-bit tail sequence derived from a four-bit Enhanced General Packet Radio Service (EGPRS)-2 tail sequence. A legacy wireless transmit/receive unit (WTRU) may be multiplexed onto an Orthogonal Sub-channel (OSC) resource, and may receive a burst including four-bit Quadrature Phase Shift Keying (QPSK)-type tail sequences that decode to legacy three-bit Gaussian Minimum Shift Keying (GMSK)-type or 8PSK-type tail sequences. The legacy WTRU processes the tail sequences, unaware that the burst was received on an OSC sub-channel or that the tail sequences were encoded as QPSK-type tail sequences. An OSC QPSK tail sequence may be chosen such that it corresponds to the legacy GMSK tail sequence format when decoded on an OSC sub-channel, but also so that a power-versus-time mask, power constraint, or other criteria on the other MUROS sub-channel may be optimized. Different tail sequences may be used in OSC bursts, depending upon whether the WTRUs multiplexed onto a timeslot are legacy WTRUs or include OSC-specific features.
16 Citations
20 Claims
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1. A base station, comprising:
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a processor configured to generate a first four-bit tail sequence to be decoded to a first length and a second four-bit tail sequence to be decoded to a second length; and a transmitter configured to transmit a first burst including the first tail sequence to a first wireless transmit/receive unit (WTRU) on a first Orthogonal Sub-channels (OSC) sub-channel on a timeslot, and to transmit a second burst including the second tail sequence to a second WTRU on a second OSC sub-channel on the timeslot. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A base station, comprising:
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a processor configured to; determine whether a first wireless transmit/receive unit (WTRU) multiplexed on a timeslot is Orthogonal Sub-channels (OSC)-capable and whether a second WTRU multiplexed on the timeslot is OSC-capable; and on a condition that the first and second WTRUs are OSC-capable, select a first four-bit tail sequence; and on a condition that the first WTRU is OSC-capable and that the second WTRU is not OSC-capable, select a second four-bit tail sequence that is decodable by the first WTRU as a four-bit tail sequence and by the second WTRU as a three-bit tail sequence; and a transmitter configured to transmit a burst to the first WTRU using the selected first or second tail sequence. - View Dependent Claims (12, 13, 14, 15)
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16. A wireless transmit/receive unit (WTRU), comprising:
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a receiver, configured to receive a burst on an Orthogonal Sub-channels (OSC) sub-channel encoded with Quadrature Phase Shift Keying (QPSK) and including a four-bit tail sequence; and a processor, configured to decode the burst, the decoded burst including a three-bit tail sequence. - View Dependent Claims (17, 18, 19, 20)
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Specification