Preamble sequence for a random access channel
AssigneeEquo IP LLC
InventorsYeong Hyeon Kwon, Seung Hee Han, Hyun Hwa Park, Dong Cheol Kim, Hyun Woo Lee, Min Seok Noh
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Abstract
Disclosed is a data transmission method in a mobile communication system. The data transmission method through a code sequence in a mobile communication system includes grouping input data streams into a plurality of blocks consisting of at least one bit so as to map each block to a corresponding signature sequence, multiplying a signature sequence stream, to which the plurality of blocks are mapped, by a specific code sequence, and transmitting the signature sequence stream multiplied by the specific code sequence to a receiver.
Claims20
A base station to receive a preamble sequence from a user equipment (UE) to at least improve detection performance comprising:
- a transmitter within the base station that is configured to transmit, to the UE over a broadcast channel, position information of an allocated random access channel resource, the position information including frequency information and timing information, wherein the timing information indicates a subframe;
- and
- a receiver within the base station that is configured to receive from the UE, based on the transmitted position information, on a random access channel, a preamble sequence transmitted using at least one 1 ms duration subframe from the UE to access a cellular network, wherein the preamble sequence has the form of a single cyclic prefix (CP) concatenated to a front-end of an N-time repetition, where N is an integer greater than 1, of the product of a Zadoff-Chu Constant Amplitude Zero Auto Correlation (CAZAC) based sequence with an exponential sequence, wherein the base station is configured to use frames for communication and each of the frames is divided into 1 ms duration subframes.
A method for a base station to receive a preamble sequence from a user equipment (UE) to at least improve detection performance comprising:
- transmitting, to the UE over a broadcast channel, position information of an allocated random access channel resource, the position information including frequency information and timing information;
- and
- receiving, based on the position information and on a random access channel, a preamble sequence using at least one 1 ms duration subframe from the UE to access a cellular network, wherein the preamble sequence has the form of a single cyclic prefix (CP) concatenated to a front-end of an N-time repetition, where N is an integer greater than 1, of the product of a Zadoff-Chu Constant Amplitude Zero Auto Correlation (CAZAC) based sequence with an exponential sequence, wherein the base station uses frames for communication and each of the frames is divided into 1 ms duration subframes.
A base station to receive a preamble sequence from a user equipment (UE) to at least improve detection performance comprising:
- a transmitter within the base station that is configured to transmit, to the UE over a broadcast channel, position information of an allocated random access channel resource, the position information including frequency information and timing information, and reference signal information for use by the base station to determine channel quality information of the UE;
- and
- a receiver within the base station that is configured to receive a reference signal based on the reference signal information and to receive, using the position information, on a random access channel, a preamble sequence from the UE to access a cellular network, wherein the preamble sequence has the form of a single cyclic prefix (CP) concatenated to a front-end of an N-time repetition, where N is an integer greater than 1, of the product of a Zadoff-Chu Constant Amplitude Zero Auto Correlation (CAZAC) based sequence with an exponential sequence.
Dependencies are inferred from the claim text.