Pilot structure with multiplexed unicast and SFN transmissions
AssigneeQUALCOMM Incorporated
InventorDurga Prasad Malladi
Life of this patent
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Abstract
Systems and methodologies are described that facilitate multiplexing unicast reference symbols and multicast transmissions in the same transmission time interval. In particular, mechanisms are provided that enable multiplexing unicast reference symbols to single frequency network transmissions that utilize a longer cyclic prefix duration. Unicast reference symbols are sent in a first symbol of a slot containing both unicast and single frequency network transmissions. The frequency utilized for the unicast reference symbols is staggered between the first symbol and a subsequent symbol in a sub-frame.
Claims14
A method for transmitting a set of pilot signals with multiplexed unicast and multicast transmissions, comprising:
- classifying one or more modes of transmission;
- selecting a longer cyclic prefix duration for at least one sub-frame in accordance with the classified one or more modes;
- and
- multiplexing unicast reference symbols, multicast reference symbols and multicast user data in the at least one sub-frame based at least in part on the longer cyclic prefix duration;
- wherein the multiplexing includes one of:
- employing unicast reference symbols in both slots of the at least one sub-frame when the sub-frame does not contain longer cyclic prefix single frequency network transmissions;
- and
- allocating unicast reference symbols only in the first slot of the at least one sub-frame when the sub-frame contains longer cyclic prefix single frequency network transmissions.
A wireless communication apparatus, comprising:
- a memory that retains instructions related to classifying one or more modes of transmission, selecting a longer cyclic prefix duration for at least one sub-frame in accordance with the classified one or more modes and multiplexing pilot information and multiplex user data in the at least one sub-frame based at least in part on the longer cyclic prefix duration;
- and
- a processor coupled to the memory, configured to execute the instructions retained in the memory;
- wherein the instructions related to the multiplexing includes one of:
- instructions related to employing unicast reference symbols in both slots of the at least one sub-frame when the sub-frame does not contain longer cyclic prefix single frequency network transmissions;
- and
- instructions related to allocating unicast reference symbols only in the first slot of the at least one sub-frame when the sub-frame contains longer cyclic prefix single frequency network transmissions.
A wireless communications apparatus that facilitates transmitting a pilot signal multiplexed with multicast transmissions, comprising:
- means for classifying one or more modes of transmission;
- means for selecting a longer cyclic prefix duration for at least one sub-frame in accordance with the classified one or more modes;
- and
- means for multiplexing pilot information and user data in the at least one sub-frame based at least in part on the longer cyclic prefix duration;
- wherein the means for multiplexing includes one of:
- means for employing unicast reference symbols in both slots of the at least one sub-frame when the sub-frame does not contain longer cyclic prefix single frequency network transmissions;
- and
- means for allocating unicast reference symbols only in the first slot of the at least one sub-frame when the sub-frame contains longer cyclic prefix single frequency network transmissions.
A non-transitory machine-readable medium having stored thereon machine-executable instructions for:
- classifying one or more modes of transmission;
- selecting a longer prefix duration for at least one sub-frame in accordance with the classified one or more modes;
- and
- multiplexing pilot information and user data in the at least one sub-frame based at least in part on the longer cyclic prefix duration;
- wherein the multiplexing includes one of:
- employing unicast reference symbols in both slots of the at least one sub-frame when the sub-frame does not contain longer cyclic prefix single frequency network transmissions;
- and
- allocating unicast reference symbols only in the first slot of the at least one sub-frame when the sub-frame contains longer cyclic prefix single frequency network transmissions.
In a wireless communication system, an apparatus comprising:
- an integrated circuit comprises a processor and a memory configured to:
- classify one or more modes of transmission;
- select a longer cyclic prefix duration for at least one sub-frame in accordance with the classified one or more modes;
- and
- multiplex pilot information and multicast user data in the at least one sub-frame based at least in part on the longer cyclic prefix duration, wherein the integrated circuit configured to multiplex is further configured to one of:
- employ unicast reference symbols in both slots of the at least one sub-frame when the sub-frame does not contain longer cyclic prefix single frequency network transmissions;
- and
- allocate unicast reference symbols only in the first slot of the at least one sub-frame when the sub-frame contains longer cyclic prefix single frequency network transmissions.
Dependencies are inferred from the claim text.