CN110312321B - Method, device and terminal for determining random access resident frequency point - Google Patents
Method, device and terminal for determining random access resident frequency point Download PDFInfo
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- CN110312321B CN110312321B CN201910390610.XA CN201910390610A CN110312321B CN 110312321 B CN110312321 B CN 110312321B CN 201910390610 A CN201910390610 A CN 201910390610A CN 110312321 B CN110312321 B CN 110312321B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
- H04W74/0891—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access for synchronized access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
Abstract
The disclosure relates to a method, a device and a terminal for determining a random access resident frequency point, wherein the method comprises the following steps: according to the preset sequence of the frequency points to be tested, sequentially switching to each frequency point to be tested to receive air interface data for the first time, wherein the time intervals are first time values; sequentially carrying out synchronous signal detection on air interface data primarily received at each frequency point to be detected, wherein the synchronous signal detection is carried out in parallel with the primary reception of the air interface data; if the synchronous signal of the frequency point to be detected in the air interface data corresponding to the Nth frequency point to be detected meets the preset standard, receiving the air interface data again at the Nth frequency point to be detected when the (N + 1) th frequency point to be detected completes the initial receiving of the air interface data, wherein N is more than or equal to 1; and detecting the broadcast channel signal of the air interface data received again, and if the detected broadcast channel signal meets a preset standard, determining the Nth frequency point to be detected as a random access resident frequency point. By utilizing the embodiment of the disclosure, the efficiency of determining the resident frequency point can be improved.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a method, an apparatus, and a terminal for determining a random access resident frequency point.
Background
With the rapid development of wireless communication technology, a fifth Generation mobile communication technology (5th Generation, abbreviated as 5G) has been developed. An nr (new radio) terminal, which is an important component of a 5G system, needs to better adapt to the high speed of the 5G system. Before random access, the NR terminal needs to quickly determine a suitable transmission frequency point of the base station, and performs random access at the residence frequency point by using the transmission frequency point as a residence frequency point.
In the prior art, a method for determining a lingering frequency point of an NR terminal generally divides a plurality of frequency spectrum ranges according to a 5G frequency division protocol, and performs synchronous signal block detection on a central frequency point of each divided frequency spectrum range one by one. Because the Synchronization Signal Block has a certain period, it is necessary to receive air interface data for a sufficient time at each central frequency point, and then perform Synchronization Signal Block SSB (Synchronization Signal Block, SSB for short) detection on the air interface data, where the SSB detection further includes Primary Synchronization Signal (PSS) detection, Secondary Synchronization Signal (SSS) detection, and Physical Broadcast Channel (PBCH) detection. By adopting the determination method in the prior art, the time consumption is long, and the efficiency of determining the frequency points where the NR terminal resides is low.
Disclosure of Invention
The disclosure provides a method, a device and a terminal for determining a random access resident frequency point, so as to improve the efficiency of determining the resident frequency point of an NR terminal.
According to a first aspect of the embodiments of the present disclosure, a method for determining a random access camping frequency point is provided, which is applied to a terminal, and the method includes:
preliminarily selecting a frequency point to be detected;
according to the preset sequence of the frequency points to be detected, sequentially switching to each frequency point to be detected for primarily receiving air interface data, wherein the time interval for primarily receiving the air interface data is a first time value;
according to the preset sequence, sequentially carrying out synchronous signal detection on the empty data which is initially received at each frequency point to be detected, wherein the synchronous signal detection is carried out in parallel with the initial empty data receiving;
if the synchronous signal of the frequency point to be detected in the air interface data corresponding to the Nth frequency point to be detected meets the preset standard, receiving the air interface data again at the Nth frequency point to be detected when the (N + 1) th frequency point to be detected completes the initial receiving of the air interface data, wherein N is more than or equal to 1;
and detecting the broadcast channel signal of the air interface data received again, and if the detected broadcast channel signal meets a preset standard, determining the Nth frequency point to be detected as a random access resident frequency point.
In one possible implementation manner, the performing, in parallel with the initially receiving air interface data, the synchronization signal detection includes:
and in the time interval of the first receiving of the air interface data at each frequency point to be detected, starting to carry out synchronous signal detection on the air interface data received by the frequency point to be detected.
In a possible implementation manner, the preliminarily selecting the frequency point to be tested includes:
scanning the received signal strength of the whole frequency spectrum which can be received by the terminal;
determining the frequency spectrum range of the frequency point to be detected according to the scanning result of the received signal intensity;
and determining the frequency point to be detected in the frequency spectrum range according to a predetermined frequency spectrum division protocol.
In a possible implementation manner, the receiving, again at the nth frequency point to be tested, air interface data includes:
determining the timing position of a synchronous signal block corresponding to the frequency point to be detected according to the synchronous signal of the frequency point to be detected;
and receiving air interface data again at the frequency point to be tested according to the timing position, wherein the time interval for receiving the air interface data again is a second time value.
In one possible implementation, the second time value is less than the first time value.
In one possible implementation, the synchronization signal detection includes:
detecting a signal-to-noise ratio of the synchronization signal;
and if the signal-to-noise ratio of the synchronous signal is higher than a preset value, the synchronous signal meets a preset standard.
In one possible implementation, the detecting of the broadcast channel signal includes:
detecting a signal-to-noise ratio of the broadcast channel signal;
and if the signal-to-noise ratio of the broadcast channel signal is higher than a preset value, the broadcast channel signal meets a preset standard.
In one possible implementation, the method further includes:
if the detected broadcast channel signal does not meet the preset standard, continuing to perform synchronous signal detection on the air interface data received by the (N + 2) th frequency point to be detected and the subsequent frequency points to be detected;
and for the frequency point to be detected, the detected synchronous signal of which accords with the preset standard, after the air interface data is received for the first time at the next frequency point to be detected, the air interface data is received again at the frequency point to be detected, and the broadcast channel signal detection is carried out on the air interface data received again until the broadcast channel signal of a certain frequency point to be detected accords with the preset standard.
In one possible implementation manner, the method for detecting the synchronization signal for the air interface data includes:
and serially detecting a main synchronous signal and an auxiliary synchronous signal of the air interface data.
In one possible implementation, the scanning of the received signal strength over the entire spectrum receivable by the terminal comprises:
dividing the whole frequency spectrum into a plurality of frequency spectrum ranges, receiving air interface data at the central frequency points of the plurality of frequency spectrum ranges, and scanning and detecting the received signal strength of the air interface data to obtain the result of scanning the received signal strength.
In a possible implementation manner, according to a predetermined spectrum division protocol, determining the frequency point to be measured in the spectrum range includes:
according to a predetermined frequency spectrum division protocol, further dividing the frequency spectrum range of the frequency point to be detected into a plurality of sub-frequency spectrums
And determining the central frequency point of the plurality of sub-spectrum ranges as the frequency point to be detected.
According to a second aspect of the embodiments of the present disclosure, there is provided a device for determining a random access camping frequency point, the device including:
the frequency point selection module to be detected is configured to preliminarily select the frequency point to be detected;
the air interface data receiving module is configured to sequentially switch to each frequency point to be detected to primarily receive air interface data according to a preset sequence of the frequency points to be detected, wherein time intervals for primarily receiving the air interface data are first time values;
the synchronous signal detection module is configured to sequentially perform synchronous signal detection on the empty data primarily received at each frequency point to be detected, and the synchronous signal detection is performed in parallel with the primarily received empty data;
a broadcast signal channel detection module configured to perform broadcast channel signal detection on the re-received air interface data;
and the resident frequency point determining module is configured to determine the Nth frequency point to be detected as a random access resident frequency point if the detected broadcast channel signal meets a preset standard.
In a possible implementation manner, the performing, in parallel, the synchronization signal detection and the initial reception of air interface data includes:
and during the period of first receiving the air interface data at each frequency point to be detected, starting to perform synchronous signal detection on the air interface data received by the frequency point to be detected.
In a possible implementation manner, the module for selecting a frequency point to be tested includes:
the signal intensity scanning module is used for scanning the received signal intensity of the whole frequency spectrum which can be received by the terminal;
the frequency spectrum range determining module is used for determining the frequency spectrum range of the frequency point to be detected according to the scanning result of the received signal intensity;
and the frequency point to be detected determining module is used for determining the frequency point to be detected in the frequency spectrum range according to a preset frequency spectrum division protocol.
In a possible implementation manner, the receiving, again at the nth frequency point to be tested, air interface data includes:
determining the timing position of a synchronous signal block corresponding to the frequency point to be detected according to the synchronous signal of the frequency point to be detected;
and receiving air interface data again at the frequency point to be tested according to the timing position, wherein the time interval for receiving the air interface data again is a second time value.
In one possible implementation, the second time value is less than the first time value.
In one possible implementation, the synchronization signal detection includes:
detecting a signal-to-noise ratio of the synchronization signal;
and if the signal-to-noise ratio of the synchronous signal is higher than a preset value, the synchronous signal meets a preset standard.
In one possible implementation, the detecting of the broadcast channel signal includes:
detecting a signal-to-noise ratio of the broadcast channel signal;
and if the signal-to-noise ratio of the broadcast channel signal is higher than a preset value, the broadcast channel signal meets a preset standard.
In a possible implementation manner, the synchronization signal detection module is further configured to continue to perform synchronization signal detection on the air interface data received by the N +2 th frequency point and the subsequent frequency points to be detected if the detected broadcast channel signal does not meet a preset standard;
the broadcast channel signal detection module is also configured to, for a frequency point to be detected, for which the detected synchronization signal meets a preset standard, after the first reception of the air interface data at a next frequency point to be detected of the frequency point to be detected is completed, receive the air interface data again at the frequency point to be detected and perform broadcast channel signal detection on the air interface data received again until the broadcast channel signal of a certain frequency point to be detected meets the preset standard.
In a possible implementation manner, the method for detecting the synchronization signal for the air interface data includes: and serially detecting a main synchronous signal and an auxiliary synchronous signal of the air interface data.
In one possible implementation, the scanning of the received signal strength over the entire spectrum receivable by the terminal comprises:
dividing the whole frequency spectrum into a plurality of frequency spectrum ranges, receiving air interface data at the central frequency points of the plurality of frequency spectrum ranges, and scanning and detecting the received signal strength of the air interface data to obtain the result of scanning the received signal strength.
In a possible implementation manner, according to a predetermined spectrum division protocol, determining the frequency point to be measured in the spectrum range includes:
according to a preset frequency spectrum division protocol, further dividing the frequency spectrum range of the frequency point to be detected into a plurality of sub-frequency spectrum ranges, and determining the central frequency point of the plurality of sub-frequency spectrum ranges as the frequency point to be detected.
According to a third aspect of the embodiments of the present disclosure, there is provided a terminal, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to carry out the method of the first aspect of the embodiments of the present disclosure when executing the instructions.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: firstly, when the frequency point to be detected receives the air interface data, the synchronous signal detection of the air interface data is carried out in parallel, namely, the synchronous signal detection is carried out on the air interface data of the frequency point to be detected in the process of receiving the air interface data by the frequency point to be detected, and the synchronous signal detection is not required to be carried out after the SSB is received, so that the total time for receiving the air interface data and the synchronous signal detection can be effectively shortened, and the efficiency for determining the frequency point where the NR terminal resides is improved. And secondly, the synchronous signal detection and the broadcast channel signal detection are carried out separately, the broadcast channel signal detection is carried out only on the frequency points to be detected of which the synchronous signal detection results meet the preset standard, and the broadcast channel signal detection is not carried out on all the frequency points to be detected, so that the time can be further shortened, and the efficiency of determining the frequency points where the NR terminal resides is further improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic flowchart of an embodiment of a method for determining a random access camping frequency point according to the present disclosure.
Fig. 2 is a flowchart illustrating an embodiment of determining a transmission beam according to time-frequency characteristic information according to the present disclosure.
Fig. 3 is a flowchart illustrating an embodiment of transmitting a random access preamble to a base station in different beams according to the present disclosure.
Fig. 4 is a schematic diagram of a first application of the method for determining a random access camping frequency point according to the present disclosure.
Fig. 5 is a schematic diagram of a second application of the method for determining a random access camping frequency point according to the present disclosure.
Fig. 6 is a schematic diagram of a third application of the method for determining a random access camping frequency point according to the present disclosure.
Fig. 7 is a schematic diagram of a fourth application of the method for determining a random access camping frequency point according to the present disclosure.
Fig. 8 is a schematic block structure diagram of an embodiment of a device for determining a random access camping frequency point according to the present disclosure.
Fig. 9 is a schematic structural diagram of one possible design of a terminal provided by the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The implementation provided in the embodiments of the present disclosure may be applied to multiple communication systems, for example, an LTE (long term evolution, LTE for short) system, or a communication system that adopts a 5G communication technology, and the present disclosure is not limited thereto.
The terminal involved in the embodiments of the present disclosure may be an NR terminal, and may include a handheld device having a wireless communication function, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem, and various forms of user equipment, a Mobile Station (MS), a terminal (terminal), a terminal equipment (terminal equipment), and so on, which are referred to as "terminals" in the present disclosure for convenience of description.
The base station related to the embodiment of the present disclosure may be an evolved Node B (NodeB or eNB or e-NodeB, evolved Node B) in an LTE system, or a base station device gNB in a 5G (5th Generation, fifth Generation mobile communication system, abbreviated as 5G) system, or a base station device etltenb in an LTE system. The embodiment of the present disclosure does not particularly limit the type of the base station.
The expression "network" and "system" appearing in the embodiments of the present disclosure are the same concept, and the communication system is a communication network.
The embodiment of the disclosure defines a unidirectional communication channel from a terminal to a base station as an uplink channel, and a unidirectional communication channel from the base station to the terminal as a downlink channel.
"plurality" appearing in embodiments of the present disclosure means two or more. The descriptions of the first, second, etc. appearing in the embodiments of the present disclosure are only for illustrating and differentiating the objects, and do not represent the order or the particular limitation of the number of the devices in the embodiments of the present disclosure, and do not constitute any limitation to the embodiments of the present disclosure.
The term "connected" in the embodiments of the present disclosure refers to various connection manners, such as direct connection or indirect connection, for example, different devices are connected through a communication interface, and is not limited at all.
Fig. 1 is a schematic flowchart of an embodiment of a method for determining a random access camping frequency point according to the present disclosure. As shown in fig. 1, the method may be applied to an NR terminal, and the method may include:
s110: and preliminarily selecting the frequency point to be detected.
And the frequency points to be detected are a plurality of candidate frequency points determined through preliminary screening. Through preliminary screening, the number of the frequency points required to be detected and determined can be reduced to a certain extent. Thereby the time of the whole resident frequency point determining process is determined.
Fig. 2 is a schematic flowchart of an embodiment of preliminarily selecting a frequency point to be tested, where as shown in fig. 2, the preliminarily selecting the frequency point to be tested may include:
s111: a received signal strength Scan (RSSI Scan) is performed over the entire spectrum that the terminal can receive.
Wherein the scanning of the received signal strength RSSI of the entire spectrum receivable by the terminal comprises:
dividing the whole frequency spectrum into a plurality of frequency spectrum ranges, receiving a predetermined amount of air interface data at the central frequency points of the plurality of frequency spectrum ranges, and scanning and detecting the received signal strength of the air interface data to obtain the result of scanning the received signal strength. The amount of the air interface data is usually 10 or 20 megabytes, but this disclosure does not limit this.
Wherein the widths of the plurality of spectral ranges are larger, and for a 5G system, the widths of the plurality of spectral ranges obtained by division are at least larger than the widths of the spectral ranges divided according to a 5G frequency division protocol,
s112: and determining the frequency spectrum range of the frequency point to be detected according to the scanning result of the received signal strength.
For example, if the RSSI strength in a certain frequency spectrum range or certain frequency spectrum ranges reaches a preset threshold, it is determined that the certain frequency spectrum range or the certain frequency spectrum ranges are the frequency spectrum ranges where the frequency points to be measured are located.
S113: and determining the frequency point to be detected in the frequency spectrum range according to a predetermined frequency spectrum division protocol.
Specifically, according to a predetermined frequency spectrum division protocol, the frequency spectrum range in which the frequency point to be detected is located is further divided into a plurality of sub-frequency spectrum ranges, and a central frequency point of the plurality of sub-frequency spectrum ranges is determined as the frequency point to be detected. The predetermined spectrum division protocol may be a 5G frequency division protocol, and may also be other specified or customized division protocols, which is not limited in this disclosure.
S120: and sequentially switching to each frequency point to be detected to primarily receive air interface data according to the preset sequence of the frequency points to be detected, wherein the time interval for primarily receiving the air interface data is a first time value.
The predetermined sequence may be a randomly generated sequence or a sequence generated according to a predetermined rule. And the preset sequencing is used for determining the detection time sequence of the frequency points to be detected. Specifically, how to set the predetermined sequence of the frequency points to be measured is not limited in this disclosure.
The time interval for receiving the air interface data represents the time required from the beginning of receiving the air interface data to the completion of the receiving. The first time value may be determined according to a period of the SSB being 20ms and a window length of 5ms, and the first time value is set to ensure that the complete synchronization signal block SSB can be received, for example, in an embodiment of the present application, the first time value may be set to 20 ms. And sequentially receiving the air interface data of each frequency point to be detected for the first time according to the preset sequence.
S130: and according to the preset sequence, sequentially carrying out synchronous signal detection on the air interface data initially received at each frequency point to be detected, wherein the synchronous signal detection is carried out in parallel with the initial air interface data reception.
The performing, in parallel, the synchronization signal detection and the initial reception of the air interface data may include:
and during the period of first receiving the air interface data at each frequency point to be detected, starting to perform synchronous signal detection on the air interface data received by the frequency point to be detected.
For example, after each frequency point to be detected receives a section of air interface data for the first time, FFT change is performed on the air interface data received by the frequency point to be detected, and synchronization signal detection is performed on the received air interface data while the air interface data continues to be received.
The method for detecting the synchronization signal of the air interface data may include:
and serially detecting a primary synchronization signal PSS and a secondary synchronization signal SSS of the air interface data.
Specifically, the manner of detecting the synchronization signal may include:
detecting a signal-to-noise ratio of the synchronization signal;
and if the signal-to-noise ratio of the synchronous signal is higher than a preset value, the synchronous signal meets a preset standard. In one embodiment of the present disclosure, if the signal-to-noise ratio of the synchronization signal is higher than 6, it is determined that the synchronization signal meets a preset criterion. Of course, in other embodiments of the present disclosure, the preset value may also be determined to be other values.
In addition, in other embodiments of the present disclosure, other parameters may be selected as the criteria for measuring the synchronization signal. The present disclosure is not limited thereto.
S140: if the synchronous signal of the frequency point to be detected in the air interface data corresponding to the nth frequency point to be detected meets the preset standard, when the (N + 1) th frequency point to be detected completes the initial reception of the air interface data, the air interface data is received again at the nth frequency point to be detected, wherein N is more than or equal to 1.
Receiving the air interface data again at the nth frequency point to be detected may include:
determining the timing position of a synchronous signal block corresponding to the frequency point to be detected according to the synchronous signal of the frequency point to be detected;
and receiving air interface data again at the frequency point to be tested according to the timing position, wherein the time interval for receiving the air interface data again is a second time value.
Since the synchronization signal PSS/SSS has been received at the frequency point to be measured, the timing position of the synchronization signal block SSB is already known when the air interface data is received again, so that when the air interface data is received again, the synchronization signal block SSB only needs to be directly received at the timing position, and the time interval is very short. In one embodiment of the present disclosure, the second time value is only 0.3 ms.
S150: and detecting the broadcast channel signal of the air interface data received again, and if the detected broadcast channel signal meets a preset standard, determining the Nth frequency point to be detected as a random access resident frequency point.
Wherein the detection of the broadcast channel signal may comprise:
detecting a signal-to-noise ratio of the broadcast channel signal;
and if the signal-to-noise ratio of the broadcast channel signal is higher than a preset value, the broadcast channel signal meets a preset standard.
Fig. 3 is a schematic flowchart of another embodiment of a method for determining a random access camping frequency point according to the present disclosure. As shown in fig. 3, the method may further include:
s160: and if the detected broadcast channel signal does not meet the preset standard, continuing to perform synchronous signal detection on the air interface data received by the (N + 2) th frequency point to be detected and the subsequent frequency points to be detected.
S170: and for the frequency point to be detected, the detected synchronous signal of which accords with the preset standard, after the air interface data is received for the first time at the next frequency point to be detected, the air interface data is received again at the frequency point to be detected, and the broadcast channel signal detection is carried out on the air interface data received again until the broadcast channel signal of a certain frequency point to be detected accords with the preset standard.
To better illustrate the practical application of the method of the present disclosure. The present disclosure, in conjunction with fig. 4, fig. 5, fig. 6, and fig. 7, illustrates several situations that may occur in the practical application of the method, and a practical application flow of the method for the several situations. In fig. 4, 5, 6, and 7, a frequency 0 represents a first frequency point to be measured, a frequency 1 represents a second frequency point to be measured, and a frequency 2 represents a third frequency point to be measured.
In the first case shown in fig. 4, the PSS/SSS of each frequency point to be detected fails, and the detection failures here and below refer to non-compliance with the predetermined standard. The PBCH case need not be handled as in fig. 1. Firstly, the frequency point 0 receives the data in real time for 20ms to detect SSB, the FFT is carried out after a section of data is fully received, the PSS/SSS detection is carried out while receiving the data, and when the 20ms data of the first frequency point 0 is completely received, the frequency point 1 is switched to receive the data. The chip accelerator is also processing the SSS of partial frequency point 0 when the frequency point 1 starts to collect data. At this time, if the frequency point 0 fails to detect the PSS/SSS, the PBCH does not need to be processed. And subsequently, after the frequency point 1 is finished, continuing to switch to 2 frequency point 2 for receiving, and repeating the steps.
The second case, as shown in fig. 5, is the case where the PBCH needs to be processed for successful PSS/SSS detection at frequency point 0, as shown in fig. 2. If the number receiving of the frequency point 0 is completed, the number receiving is switched to the frequency point 1, but the SSS of the frequency point 0 is not processed yet, then whether the detection of the SSS of the next frequency point 0 is successful or not needs to be confirmed after the number receiving of the frequency point 1 is completed, and after the success is found, the frequency point is switched back to the frequency point 0 for number receiving. At this time, the SSS is detected successfully, the initial timing position of the SSB is known, and the chip accelerator only needs to receive data at the timing position and can receive the SSB, so that only 0.3ms data needs to be received. And if the PBCH detection of the frequency point 0 is successful, immediately entering a random access process to try to reside.
As shown in fig. 6, in the third case, the detection of the broadcast channel signal at frequency point 0 fails, and in this case, the next frequency point 2 is continuously switched to receive air interface data for the first time and perform PSS/SSS detection.
As shown in fig. 7, in the fourth case, after the PSS/SSS of both frequency point 0 and frequency point 1 are successfully detected and the PBCH dec of frequency point 0 is successful, in order to quickly determine the camping frequency point and quickly camp, it is selected to determine frequency point 0 as the camping frequency point first, regardless of the SSS detection result of frequency point 1.
Of course, the above four cases are only representative of some applications of the method provided by the present disclosure. In other similar cases, the present disclosure is not repeated.
By using the implementation manner of the method for determining the random access resident frequency point provided by the foregoing embodiments, at least the following technical effects can be achieved:
firstly, when the frequency point to be detected receives the air interface data, the synchronous signal detection of the air interface data is carried out in parallel, namely, the synchronous signal detection is carried out on the air interface data of the frequency point to be detected in the process of receiving the air interface data by the frequency point to be detected, and the synchronous signal detection is not required to be carried out after the SSB is received, so that the total time for receiving the air interface data and the synchronous signal detection can be effectively shortened, and the efficiency for determining the frequency point where the NR terminal resides is improved. And secondly, the synchronous signal detection and the broadcast channel signal detection are carried out separately, the broadcast channel signal detection is carried out only on the frequency points to be detected of which the synchronous signal detection results meet the preset standard, and the broadcast channel signal detection is not carried out on all the frequency points to be detected, so that the time can be further shortened, and the efficiency of determining the frequency points where the NR terminal resides is further improved.
Based on the method for determining the random access resident frequency point in each embodiment, the disclosure further provides a device for determining the random access resident frequency point. Fig. 8 is a schematic block structure diagram of an embodiment of a device for determining a random access camping frequency point according to the present disclosure. Specifically, as shown in fig. 8, the apparatus may include:
and the frequency point selection module 101 to be tested is configured to preliminarily select the frequency point to be tested.
The air interface data receiving module 102 is configured to sequentially switch to each frequency point to be detected to primarily receive air interface data according to a predetermined sequence of the frequency points to be detected, where time intervals for primarily receiving the air interface data are first time values.
And the synchronization signal detection module 103 is configured to perform synchronization signal detection on the air interface data initially received at each frequency point to be detected in sequence, where the synchronization signal detection is performed in parallel with the initial reception of the air interface data.
A broadcast signal channel detection module 104 configured to perform broadcast channel signal detection on the re-received air interface data.
The resident frequency point determining module 105 is configured to determine that the nth frequency point to be detected is a random access resident frequency point if the detected broadcast channel signal meets a preset standard.
In an embodiment of the present disclosure, the performing, in parallel, the synchronization signal detection and the initial reception of air interface data may include:
and during the period of first receiving the air interface data at each frequency point to be detected, starting to perform synchronous signal detection on the air interface data received by the frequency point to be detected.
In an embodiment of the present disclosure, the module 101 for selecting a frequency point to be detected may include:
a signal strength scanning module 1011 configured to perform received signal strength scanning on the entire frequency spectrum receivable by the terminal.
A spectrum range determining module 1012 configured to determine a spectrum range where the frequency point to be tested is located according to the result of the received signal strength scanning.
And the frequency point to be tested determining module 1013 is configured to determine the frequency point to be tested within the frequency spectrum range according to a predetermined frequency spectrum division protocol.
In an embodiment of the present disclosure, the receiving, again at the nth frequency point to be detected, air interface data includes:
determining the timing position of a synchronous signal block corresponding to the frequency point to be detected according to the synchronous signal of the frequency point to be detected;
and receiving air interface data again at the frequency point to be tested according to the timing position, wherein the time interval for receiving the air interface data again is a second time value.
In one embodiment of the present disclosure, the second time value is less than the first time value.
In one embodiment of the present disclosure, the synchronization signal detection may include:
detecting a signal-to-noise ratio of the synchronization signal;
and if the signal-to-noise ratio of the synchronous signal is higher than a preset value, the synchronous signal meets a preset standard.
In one embodiment of the present disclosure, the detecting of the broadcast channel signal may include:
detecting a signal-to-noise ratio of the broadcast channel signal;
and if the signal-to-noise ratio of the broadcast channel signal is higher than a preset value, the broadcast channel signal meets a preset standard.
In an embodiment of the present disclosure, the synchronization signal detection module is further configured to continue to perform synchronization signal detection on the air interface data received by the N +2 th and subsequent frequency points to be detected if the detected broadcast channel signal does not meet a preset standard;
the broadcast channel signal detection module is also configured to, for a frequency point to be detected, for which the detected synchronization signal meets a preset standard, after the first reception of the air interface data at a next frequency point to be detected of the frequency point to be detected is completed, receive the air interface data again at the frequency point to be detected and perform broadcast channel signal detection on the air interface data received again until the broadcast channel signal of a certain frequency point to be detected meets the preset standard.
In an embodiment of the present disclosure, the method for detecting the synchronization signal of the air interface data may include: and serially detecting a main synchronous signal and an auxiliary synchronous signal of the air interface data.
In one embodiment of the present disclosure, the scanning the received signal strength of the entire frequency spectrum receivable by the terminal includes:
dividing the whole frequency spectrum into a plurality of frequency spectrum ranges, receiving air interface data at the central frequency points of the plurality of frequency spectrum ranges, and scanning and detecting the received signal strength of the air interface data to obtain the result of scanning the received signal strength.
In an embodiment of the present disclosure, determining the frequency point to be detected in the spectrum range according to a predetermined spectrum division protocol includes:
according to a preset frequency spectrum division protocol, further dividing the frequency spectrum range of the frequency point to be detected into a plurality of sub-frequency spectrum ranges, and determining the central frequency point of the plurality of sub-frequency spectrum ranges as the frequency point to be detected.
For the same or similar processes related to the above-mentioned apparatuses as those in the embodiments shown in fig. 1 to 7, specific implementations may be implemented according to the implementations provided in the embodiments corresponding to fig. 1 to 7.
Based on the method for adjusting the timing of the activation process of the secondary cell described in the above embodiments, the present disclosure further provides a terminal. Fig. 9 is a schematic structural diagram illustrating one possible design of a terminal according to an embodiment of the present disclosure. Specifically, as shown in fig. 9, the terminal may include:
a processor 201. The processor 201 is configured to control and manage the actions of the terminal, and perform various functions to support communication services provided by the control device.
A memory 202 for storing processor-executable instructions. The memory 202 is used for storing executable instructions and data of the terminal for performing the beam determination method provided by the embodiment of the present disclosure, and the executable instructions include computer operation instructions. The computer program code stored by the memory 202 may be executed by the processor 201.
The processor 201 is configured to execute the instructions to support the terminal to implement the method flows executed by the terminal in the embodiments shown in fig. 1 to fig. 7.
The transmitter/receiver 203 is used to support the terminal UE to communicate with the base station.
The communication module 204 is used for supporting communication between the terminal and other network devices, for example, supporting communication with other terminals, and the communication module 204 may include a communication interface between the terminal and other terminals.
It is clear to those skilled in the art that the embodiments of the present disclosure may be referred to each other, for example, for convenience and brevity of description, the specific working processes of the units or modules in the above-described apparatus and apparatus may be described with reference to the corresponding processes in the foregoing method embodiments.
It is understood that the processor described in the embodiments of the present disclosure may be a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware, in software instructions executed by a processor, or in a computer program product. The software instructions may consist of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in user equipment. Of course, the processor and the storage medium may reside as discrete components in user equipment.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this disclosure may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways without departing from the scope of the present disclosure. For example, the above-described embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort. Additionally, the schematic diagrams of the described systems, devices, and methods, as well as different embodiments, may be combined or integrated with other systems, modules, techniques, or methods without departing from the scope of the present disclosure. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some interfaces, and may be in an electronic, mechanical or other form.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (23)
1. A method for determining a random access resident frequency point is applied to a terminal, and the method comprises the following steps:
preliminarily selecting a frequency point to be detected;
according to the preset sequence of the frequency points to be detected, sequentially switching to each frequency point to be detected for primarily receiving air interface data, wherein the time interval for primarily receiving the air interface data is a first time value;
according to the preset sequence, sequentially carrying out synchronous signal detection on the empty data which is initially received at each frequency point to be detected, wherein the synchronous signal detection is carried out in parallel with the initial empty data receiving;
if the synchronous signal of the frequency point to be detected in the air interface data corresponding to the Nth frequency point to be detected meets the preset standard, receiving the air interface data again at the Nth frequency point to be detected when the (N + 1) th frequency point to be detected completes the initial receiving of the air interface data, wherein N is more than or equal to 1;
and detecting the broadcast channel signal of the air interface data received again, and if the detected broadcast channel signal meets a preset standard, determining the Nth frequency point to be detected as a random access resident frequency point.
2. The method for determining a random access camping frequency point according to claim 1, wherein the performing the synchronization signal detection and the initial receiving of air interface data in parallel comprises:
and during the period of first receiving the air interface data at each frequency point to be detected, starting to perform synchronous signal detection on the air interface data received by the frequency point to be detected.
3. The method for determining the random access resident frequency point according to claim 1, wherein the preliminary selection of the frequency point to be tested comprises:
scanning the received signal strength of the whole frequency spectrum which can be received by the terminal;
determining the frequency spectrum range of the frequency point to be detected according to the scanning result of the received signal intensity;
and determining the frequency point to be detected in the frequency spectrum range according to a predetermined frequency spectrum division protocol.
4. The method for determining the random access resident frequency point according to claim 1, wherein the step of receiving the air interface data again at the nth frequency point to be tested comprises:
determining the timing position of a synchronous signal block corresponding to the frequency point to be detected according to the synchronous signal of the frequency point to be detected;
and receiving air interface data again at the frequency point to be tested according to the timing position, wherein the time interval for receiving the air interface data again is a second time value.
5. The method for determining frequency camping on random access point of claim 4, wherein the second time value is smaller than the first time value.
6. The method for determining the random access camping frequency point according to claim 1, wherein the detecting the synchronization signal comprises:
detecting a signal-to-noise ratio of the synchronization signal;
and if the signal-to-noise ratio of the synchronous signal is higher than a preset value, the synchronous signal meets a preset standard.
7. The method for determining frequency points where random access resides according to claim 1, wherein the detection of the broadcast channel signal comprises:
detecting a signal-to-noise ratio of the broadcast channel signal;
and if the signal-to-noise ratio of the broadcast channel signal is higher than a preset value, the broadcast channel signal meets a preset standard.
8. The method for determining the random access camping frequency point according to claim 1, wherein the method further comprises:
if the detected broadcast channel signal does not meet the preset standard, continuing to perform synchronous signal detection on the air interface data received by the (N + 2) th frequency point to be detected and the subsequent frequency points to be detected;
and for the frequency point to be detected, the detected synchronous signal of which accords with the preset standard, after the air interface data is received for the first time at the next frequency point to be detected, the air interface data is received again at the frequency point to be detected, and the broadcast channel signal detection is carried out on the air interface data received again until the broadcast channel signal of a certain frequency point to be detected accords with the preset standard.
9. The method for determining the random access resident frequency point according to any one of claims 1, 2 and 8, wherein a manner of detecting the synchronization signal for the air interface data includes:
and serially detecting a main synchronous signal and an auxiliary synchronous signal of the air interface data.
10. The method as claimed in claim 3, wherein the step of scanning the received signal strength of the entire frequency spectrum receivable by the terminal comprises:
dividing the whole frequency spectrum into a plurality of frequency spectrum ranges, receiving air interface data at the central frequency points of the plurality of frequency spectrum ranges, and scanning and detecting the received signal strength of the air interface data to obtain the result of scanning the received signal strength.
11. The method for determining the random access resident frequency point according to claim 3, wherein the determining the frequency point to be tested in the spectrum range according to a predetermined spectrum division protocol comprises:
according to a preset frequency spectrum division protocol, further dividing the frequency spectrum range of the frequency point to be detected into a plurality of sub-frequency spectrum ranges, and determining the central frequency point of the plurality of sub-frequency spectrum ranges as the frequency point to be detected.
12. A device for determining a random access resident frequency point is applied to a terminal, and comprises:
the frequency point selection module to be detected is configured to preliminarily select the frequency point to be detected;
the air interface data receiving module is configured to sequentially switch to each frequency point to be detected to primarily receive air interface data according to a preset sequence of the frequency points to be detected, wherein time intervals for primarily receiving the air interface data are first time values;
the synchronous signal detection module is configured to sequentially perform synchronous signal detection on the empty data primarily received at each frequency point to be detected, and the synchronous signal detection is performed in parallel with the primarily received empty data;
the air interface data receiving module is further configured to receive air interface data again at the nth frequency point to be detected when the initial receiving of the air interface data at the (N + 1) th frequency point to be detected is completed if it is detected that the synchronization signal of the frequency point to be detected in the air interface data corresponding to the nth frequency point to be detected meets a preset standard, wherein N is greater than or equal to 1;
a broadcast signal channel detection module configured to perform broadcast channel signal detection on the re-received air interface data;
and the resident frequency point determining module is configured to determine the Nth frequency point to be detected as a random access resident frequency point if the detected broadcast channel signal meets a preset standard.
13. The apparatus for determining a random access camping frequency point according to claim 12, wherein the synchronization signal detection and the initial reception of air interface data are performed in parallel, and includes:
and during the period of first receiving the air interface data at each frequency point to be detected, starting to perform synchronous signal detection on the air interface data received by the frequency point to be detected.
14. The apparatus for determining random access resident frequency point according to claim 12, wherein the module for selecting a frequency point to be tested comprises:
a signal strength scanning module configured to perform received signal strength scanning on the entire frequency spectrum receivable by the terminal;
the frequency spectrum range determining module is configured to determine the frequency spectrum range of the frequency point to be detected according to the scanning result of the received signal strength;
and the frequency point to be tested determining module is configured to determine the frequency point to be tested in the frequency spectrum range according to a predetermined frequency spectrum division protocol.
15. The apparatus for determining a random access camping frequency point according to claim 12, wherein the step of receiving air interface data again at the nth frequency point to be tested includes:
determining the timing position of a synchronous signal block corresponding to the frequency point to be detected according to the synchronous signal of the frequency point to be detected;
and receiving air interface data again at the frequency point to be tested according to the timing position, wherein the time interval for receiving the air interface data again is a second time value.
16. The apparatus of claim 15, wherein the second time value is less than the first time value.
17. The apparatus for determining a camping frequency point for random access according to claim 15, wherein the detecting of the synchronization signal comprises:
detecting a signal-to-noise ratio of the synchronization signal;
and if the signal-to-noise ratio of the synchronous signal is higher than a preset value, the synchronous signal meets a preset standard.
18. The apparatus for determining frequency camping on random access point of claim 15, wherein the detecting of the broadcast channel signal comprises:
detecting a signal-to-noise ratio of the broadcast channel signal;
and if the signal-to-noise ratio of the broadcast channel signal is higher than a preset value, the broadcast channel signal meets a preset standard.
19. The apparatus for determining a random access reserved frequency point according to claim 12, wherein the synchronization signal detection module is further configured to continue to perform synchronization signal detection on the air interface data received by the N +2 th and subsequent frequency points to be detected if the detected broadcast channel signal does not meet a preset standard;
the broadcast channel signal detection module is also configured to, for a frequency point to be detected, for which the detected synchronization signal meets a preset standard, after the first reception of the air interface data at a next frequency point to be detected of the frequency point to be detected is completed, receive the air interface data again at the frequency point to be detected and perform broadcast channel signal detection on the air interface data received again until the broadcast channel signal of a certain frequency point to be detected meets the preset standard.
20. The apparatus for determining a random access camping frequency point according to any one of claims 12, 13 and 19, wherein a manner of detecting a synchronization signal for the air interface data includes: and serially detecting a main synchronous signal and an auxiliary synchronous signal of the air interface data.
21. The apparatus for determining frequency camping on random access point of claim 14, wherein scanning the received signal strength of the entire frequency spectrum receivable by the terminal comprises:
dividing the whole frequency spectrum into a plurality of frequency spectrum ranges, receiving air interface data at the central frequency points of the plurality of frequency spectrum ranges, and scanning and detecting the received signal strength of the air interface data to obtain the result of scanning the received signal strength.
22. The apparatus for determining frequency points with random access residence according to claim 14, wherein the determining the frequency points to be tested within the spectrum according to a predetermined spectrum division protocol comprises:
according to a preset frequency spectrum division protocol, further dividing the frequency spectrum range of the frequency point to be detected into a plurality of sub-frequency spectrum ranges, and determining the central frequency point of the plurality of sub-frequency spectrum ranges as the frequency point to be detected.
23. A terminal, characterized in that the terminal comprises:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to carry out the method of any one of claims 1 to 11 when executing the instructions.
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| CN104811977B (en) * | 2015-04-03 | 2018-05-01 | 京信通信系统（中国）有限公司 | A kind of method and apparatus for intercepting adjacent area |
| US10341946B2 (en) * | 2017-05-05 | 2019-07-02 | Qualcomm Incorporated | Frequency scan in NR wireless communication |
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