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CN-122002623-A - Terminal self-judging rapid random access method and device

CN122002623ACN 122002623 ACN122002623 ACN 122002623ACN-122002623-A

Abstract

The invention relates to a terminal self-judging rapid random access method which is applied to a terminal and comprises the steps of transmitting an IMEI Z sequence of the terminal on an access statement resource corresponding to a selected access opportunity after completing random selection of the access opportunity, synchronously receiving a noise measurement resource corresponding to the access opportunity and a signal on the access statement resource, measuring reference noise power according to the signal on the noise measurement resource, calculating self signal power according to the signal on the access statement resource, carrying out access conflict judgment according to the reference noise power and the self signal power, and selecting a proper random access flow according to a conflict judgment result. The invention can accelerate the access speed of the terminal.

Inventors

  • CHENG YI

Assignees

  • 白盒子(上海)微电子科技有限公司

Dates

Publication Date
20260508
Application Date
20260108

Claims (9)

  1. 1. The terminal self-judging rapid random access method is applied to a terminal and is characterized by comprising the following steps: after the random selection of the access opportunity is completed, before the random access preamble message is sent, transmitting an IMEI Z sequence of the random access preamble message on an access declaration resource corresponding to the selected access opportunity, and synchronously receiving a noise measurement resource corresponding to the access opportunity and a signal on the access declaration resource; measuring reference noise power according to the signal on the noise measurement resource, and calculating self signal power according to the signal on the access declaration resource; performing access conflict judgment according to the reference noise power and the self signal power; selecting a proper random access flow according to the result of conflict judgment; The access time is configured with three uplink resources, namely a noise measurement resource, an access declaration resource and a transmission time of a random access preamble message according to time sequence, and the IMEI Z sequence is a group of Zadoff-Chu sequences defined for the identity code of each terminal.
  2. 2. The method for self-judging fast random access of terminal according to claim 1, wherein the noise measurement resource and the access declaration resource are in the same frequency and are adjacent in time, and the time-frequency resource where the noise measurement resource is located is not allowed to be used for any other uplink signal transmission.
  3. 3. The terminal self-judging fast random access method according to claim 1, wherein the calculating self-signal power according to the signal on the access declaration resource is specifically as follows: And performing autocorrelation calculation on the time domain sampling signal on the received access statement resource and a time sequence generated by the IMEI Z sequence of the time domain sampling signal to obtain an autocorrelation sequence, and performing accumulation processing on the obtained autocorrelation sequence to obtain the signal power of the time domain sampling signal.
  4. 4. The terminal self-judging fast random access method according to claim 1, wherein the access conflict judgment is performed according to the reference noise power and the self-signal power, specifically comprising: performing modular operation on the time domain sampling signal sequence on the received access declaration resource, and then performing accumulation processing on the operation result to obtain the total power of the signal on the access declaration resource; Subtracting the self signal power from the total signal power on the access declaration resource to obtain interference noise power on the access declaration resource; when the product of the interference noise power and the judgment threshold value is smaller than the reference noise power, judging that the access conflict is not possible in the currently selected access opportunity; When the product of the interference noise power and the judgment threshold value is larger than or equal to the reference noise power, judging that the access conflict exists in the currently selected access opportunity.
  5. 5. The method for self-judging fast random access of a terminal according to claim 4, wherein when the terminal selects a proper random access procedure according to the result of collision judgment, and when the terminal judges that there is no possibility of access collision at the currently selected access opportunity, one non-competitive random access Zadoff-Chu sequence is selected from a non-competitive random access Zadoff-Chu sequence group configured by a base station, and is transmitted to the base station at the transmission opportunity of the corresponding random access preamble message.
  6. 6. The method for terminal self-judging fast random access according to claim 4, wherein when the terminal selects a proper random access procedure according to the result of collision judgment, when the terminal judges that there is a possibility of access collision at the currently selected access opportunity, randomly selecting one competitive random access Zadoff-Chu sequence from the competitive random access Zadoff-Chu sequence set configured by the base station, transmitting to the base station at the transmission opportunity of the corresponding random access preamble message, or discarding the currently selected access opportunity, and reselecting other access opportunities.
  7. 7. A terminal self-judging fast random access device, applied to a terminal, characterized by comprising: The transmitting and receiving module is used for transmitting an IMEI Z sequence of the transmitting and receiving module on an access declaration resource corresponding to the selected access opportunity and synchronously receiving a noise measurement resource corresponding to the access opportunity and a signal on the access declaration resource before transmitting the random access preamble message after completing the random selection of the access opportunity; the measurement calculation module is used for measuring reference noise power according to the signal on the noise measurement resource and calculating self signal power according to the signal on the access statement resource; the conflict judging module is used for carrying out access conflict judgment according to the reference noise power and the self signal power; The selection module is used for selecting a proper random access flow according to the conflict judgment result; The access time is configured with three uplink resources, namely a noise measurement resource, an access declaration resource and a transmission time of a random access preamble message according to time sequence, and the IMEI Z sequence is a group of Zadoff-Chu sequences defined for the identity code of each terminal.
  8. 8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the terminal self-judging fast random access method according to any of claims 1-6 when the computer program is executed.
  9. 9. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor realizes the steps of the terminal self-judging fast random access method according to any of claims 1-6.

Description

Terminal self-judging rapid random access method and device Technical Field The present invention relates to the field of wireless communication technologies, and in particular, to a terminal self-judging fast random access method and device. Background In the wireless communication technologies such as 5G, after obtaining the system configuration of the base station, the terminal needs to access the base station through a random access process, and when transmitting the message 1 (i.e., a random access preamble), the terminal randomly selects a sequence from the Zadoff-Chu sequence set provided by the base station, and randomly selects a time to transmit in the transmission time set specified by the base station. Because the base station can not detect the Zadoff-Chu sequence in one transmitting time without limit due to the limitation of the calculation power of the base station, the number of Zadoff-Chu sequence sets provided by the base station is limited, and before the base station is accessed, the access terminal does not know the behaviors of other terminals in the coverage range of the current base station, more than two terminals can use the same access time and the same Zadoff-Chu sequence to carry out random access process in the same base station, thereby causing conflict. To resolve the collision, the access terminal continues to send the message 3 (i.e. uplink scheduling transmission) and receives the message 4 (i.e. contention resolution message) sent by the base station after receiving the message 2 (i.e. random access response) sent by the base station, which delays the time for the terminal to access the base station. Disclosure of Invention The invention aims to provide a terminal self-judging rapid random access method and device, which can accelerate the access speed of a terminal. The invention provides a terminal self-judging rapid random access method, which is applied to a terminal and comprises the following steps: after the random selection of the access opportunity is completed, before the random access preamble message is sent, transmitting an IMEI Z sequence of the random access preamble message on an access declaration resource corresponding to the selected access opportunity, and synchronously receiving a noise measurement resource corresponding to the access opportunity and a signal on the access declaration resource; measuring reference noise power according to the signal on the noise measurement resource, and calculating self signal power according to the signal on the access declaration resource; performing access conflict judgment according to the reference noise power and the self signal power; selecting a proper random access flow according to the result of conflict judgment; The access time is configured with three uplink resources, namely a noise measurement resource, an access declaration resource and a transmission time of a random access preamble message according to time sequence, and the IMEI Z sequence is a group of Zadoff-Chu sequences defined for the identity code of each terminal. The noise measurement resource and the access declaration resource are in the same frequency and are adjacent in time, and the time-frequency resource where the noise measurement resource is located is not allowed to be used for any other uplink signal transmission. The method comprises the steps of calculating self signal power according to the signal on the access declaration resource, specifically: And performing autocorrelation calculation on the time domain sampling signal on the received access statement resource and a time sequence generated by the IMEI Z sequence of the time domain sampling signal to obtain an autocorrelation sequence, and performing accumulation processing on the obtained autocorrelation sequence to obtain the signal power of the time domain sampling signal. The step of performing access conflict judgment according to the reference noise power and the self signal power specifically comprises the following steps: performing modular operation on the time domain sampling signal sequence on the received access declaration resource, and then performing accumulation processing on the operation result to obtain the total power of the signal on the access declaration resource; Subtracting the self signal power from the total signal power on the access declaration resource to obtain interference noise power on the access declaration resource; when the product of the interference noise power and the judgment threshold value is smaller than the reference noise power, judging that the access conflict is not possible in the currently selected access opportunity; When the product of the interference noise power and the judgment threshold value is larger than or equal to the reference noise power, judging that the access conflict exists in the currently selected access opportunity. When the terminal judges that the current selected access time has no possibility of acce