DM RD based LTE downlink physical layer
First Claim
1. An apparatus comprising:
- at least one processor;
memory storing a program of instructions;
wherein the memory storing the program of instructions is configured to, with the at least one processor, cause the apparatus to at least;
in a user equipment operating in a cellular communication system;
control the user equipment to synchronize with a cell of a cellular communication system based on a synchronization signal and to obtain a cell identification of the cell;
control the user equipment to receive in the course of a cell search procedure at least one symbol of a physical broadcast channel;
control the user equipment to obtain a common demodulation reference signal based on the cell; and
control the user equipment to demodulate a signal received on the physical broadcast channel based on the common demodulation reference signal, wherein the user equipment is configured so as to recognize that each subcarrier or subframe in which the common demodulation reference signal appears will carry, in addition to the common demodulation reference signal, the at least one symbol of the physical broadcast channel, so that the presence of the common demodulation reference signal in the transmission is interpreted as an indication of the presence of the at least one symbol of the physical broadcast channel.
2 Assignments
0 Petitions
Accused Products
Abstract
It is provided an apparatus, including synchronizing means adapted to synchronize with a cell of a cellular communication system based on a synchronization signal and to obtain a cell identification of the cell; receiving means adapted to receive a symbol only on one or more subcarriers and subframes which carry at least one symbol of a physical broadcast channel; first obtaining means adapted to obtain a common demodulation reference symbol based on the cell identification and the received symbol; demodulating means adapted to demodulate a signal received on the physical broadcast channel based on the common demodulation reference symbol; user equipment means adapted to provide a user equipment functionality of the communication system.
20 Citations
18 Claims
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1. An apparatus comprising:
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at least one processor; memory storing a program of instructions; wherein the memory storing the program of instructions is configured to, with the at least one processor, cause the apparatus to at least; in a user equipment operating in a cellular communication system; control the user equipment to synchronize with a cell of a cellular communication system based on a synchronization signal and to obtain a cell identification of the cell; control the user equipment to receive in the course of a cell search procedure at least one symbol of a physical broadcast channel; control the user equipment to obtain a common demodulation reference signal based on the cell; and control the user equipment to demodulate a signal received on the physical broadcast channel based on the common demodulation reference signal, wherein the user equipment is configured so as to recognize that each subcarrier or subframe in which the common demodulation reference signal appears will carry, in addition to the common demodulation reference signal, the at least one symbol of the physical broadcast channel, so that the presence of the common demodulation reference signal in the transmission is interpreted as an indication of the presence of the at least one symbol of the physical broadcast channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus comprising:
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at least one processor; memory storing a program of instructions; wherein the memory storing the program of instructions is configured to, with the at least one processor, cause the apparatus to at least; in a base station operating in a cell of a cellular communication system, control the base station to broadcast a common demodulation reference signal in a transmission, wherein the common demodulation reference signal is based on a cell identification of the cell, and wherein the base station is further controlled to manage transmission of the common demodulation reference signal such that each subcarrier and subframe in which the common demodulation reference signal appears also carries at least one symbol of a physical broadcast channel, so that the presence of the common demodulation reference signal provides an indication of the presence of the at least one symbol of the physical broadcast channel in the transmission; and wherein the physical broadcast channel comprises basic system information for a cell search procedure. - View Dependent Claims (10, 11, 12)
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13. A method comprising:
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synchronizing with a cell of a cellular communication system based on a synchronization signal to obtain a cell identification of the cell; receiving in the course of a cell search procedure at least one symbol of a physical broadcast channel; obtaining a common demodulation reference signal based on the cell identification; demodulating a signal received on the physical broadcast channel based on the common demodulation reference signal; and providing a user equipment functionality of the cellular communication system; wherein providing the user equipment functionality comprises configuring the user equipment so as to recognize that each subcarrier or subframe in which the common demodulation reference signal appears will carry, in addition to the common demodulation reference signal, the at least one symbol of the physical broadcast channel, so that the presence of the common demodulation reference signal in the transmission is interpreted as an indication of the presence of the at least one symbol of the physical broadcast channel. - View Dependent Claims (14, 15, 16, 18)
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17. A method comprising:
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providing a base station functionality in a cell of a cellular communication system; broadcasting a common demodulation reference signal to all user equipments in a transmission, wherein the common demodulation reference signal is based on a cell identification of the cell, and wherein transmission of the common demodulation reference signal is managed such that each subcarrier and subframe in which the common demodulation reference signal appears also carries at least one symbol of a physical broadcast channel, so that the presence of the common demodulation reference signal provides an indication of the presence of the at least one symbol of the physical broadcast channel in the transmission; and wherein the physical broadcast channel comprises basic system information for a cell search procedure.
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Specification