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US 11,889,563 B2Granted
Random access method and apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsChenlei Xu, Jianwei Zhou, Hejia Luo, Jun Wang
Life of this patent
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Abstract
This application provides a random access method and an apparatus. The method includes: receiving, by a terminal device, a broadcast signal; and sending, by the terminal device, a random access signal, where a preamble sequence in the random access signal includes K first symbols and Q second symbols, the first symbol and the second symbol are different from each other, K and Q are integers greater than or equal to 1, K+Q=NSEQ, and NSEQ is a quantity of symbols included in the preamble sequence.
Claims23
A method, comprising:
- receiving, by a terminal device, a broadcast signal comprising random access configuration information;
- and
- sending, by the terminal device according to the random access configuration information, a random access signal, wherein a preamble sequence comprised in the random access signal comprises K first symbols and Q second symbols, at least one first symbol of the K first symbols is different than at least one second symbol of the Q second symbols, K and Q are integers greater than or equal to 1, K+Q=NSEQ, and NSEQ is a quantity of symbols comprised in the preamble sequence;
- and
- wherein the random access signal further comprises a cyclic prefix, the preamble sequence, and a guard time, and the K first symbols and the Q second symbols satisfy at least one of the following first conditions:
- NSEQ≥K×(NCPi+1);
- or
- TSEQ≥TCP≥ΔTRTD, and TSEQ≥TGT≥ΔTRTD;
- and
- wherein NCPi represents an integral part of a quantity of symbols comprised in the cyclic prefix, TSEQ represents a time length of the preamble sequence, TCP represents a time length of the cyclic prefix, TGT represents a time length of the guard time, and ΔTRTD represents a maximum round trip transmission delay difference in a cell.
7 more elements
A method, comprising:
- sending, by an access network device, a broadcast signal comprising random access configuration information;
- and
- receiving, by the access network device according to the random access configuration information, a random access signal, wherein a preamble sequence comprised in the random access signal comprises K first symbols and Q second symbols, at least one first symbol of the K first symbols is different than at least one second symbol of the Q second symbols, K and Q are integers greater than or equal to 1, K+Q=NSEQ, and NSEQ is a quantity of symbols comprised in the preamble sequence;
- and
- wherein the random access signal further comprises a cyclic prefix, the preamble sequence, and a guard time, and the K first symbols and the Q second symbols satisfy at least one of the following first conditions:
- NSEQ≥K×(NCPi+1);
- or
- TSEQ≥TCP≥ΔTRTD, and TSEQ≥TGT≥ΔTRTD;
- and
- wherein NCPi represents an integral part of a quantity of symbols comprised in the cyclic prefix, TSEQ represents a time length of the preamble sequence, TCP represents a time length of the cyclic prefix, TGT represents a time length of the guard time, and ΔTRTD represents a maximum round trip transmission delay difference in a cell.
7 more elements
A terminal device, comprising:
- a memory;
- a processor;
- and
- a transceiver;
- wherein the memory is configured to store a computer program;
- and
- wherein the processor is configured to execute the computer program stored in the memory;
- and when the computer program is executed, the processor is configured to:
- receive, using the transceiver, a broadcast signal comprising random access configuration information;
- and
- send, according to the random access configuration information, a random access signal by using the transceiver, wherein a preamble sequence comprised in the random access signal comprises K first symbols and Q second symbols, at least one first symbol of the K first symbols is different than at least one second symbol of the Q second symbols, K and Q are integers greater than or equal to 1, K+Q=NSEQ, and NSEQ is a quantity of symbols comprised in the preamble sequence;
- and
- wherein the random access signal further comprises a cyclic prefix, the preamble sequence, and a guard time, and the K first symbols and the Q second symbols satisfy at least one of the following first conditions:
- NSEQ≥K×(NCPi+1);
- or
- TSEQ≥TCP≥ΔTRTD, and TSEQ≥TGT≥ΔTRTD;
- and
- wherein NCPi represents an integral part of a quantity of symbols comprised in the cyclic prefix, TSEQ represents a time length of the preamble sequence, TCP represents a time length of the cyclic prefix, TGT represents a time length of the guard time, and ΔTRTD represents a maximum round trip transmission delay difference in a cell.
15 more elements
Dependencies are inferred from the claim text.