Random access method and communication device

Abstract

The application provides a random access method and a communication device, wherein the random access method comprises: obtaining at least one parameter related to a historical time-frequency offset adjustment when it is necessary to access a network device; and performing pre-synchronization between the network device and the device before initiating random access if the at least one parameter satisfies a synchronization condition. By using the application, the necessity of inserting a pre-synchronization process can be ensured, so that a balance between reducing time delay and improving the success rate of random access can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a random access method and a communication device. BACKGROUND

[0002] For a mobile terminal, due to the time and frequency deviation caused by the crystal oscillator frequency deviation and the mobile Doppler, a pre-synchronization process is usually needed, that is, the time and frequency deviation is adjusted through a synchronization signal, for example, the time and frequency deviation is estimated through a periodic synchronization signal and a PBCH block (Synchronization Signal and PBCH block, SSB) signal. For example, in a paging process, a pre-synchronization process needs to be performed in advance to adjust the time and frequency deviation. For a calling service of a terminal device in an idle state, the service has randomness, and since the pre-synchronization process is inserted before random access, the time delay is obviously increased, which affects the user experience. Therefore, at present, the pre-synchronization process is usually not performed before random access, and the terminal device directly accesses the base station. However, if the pre-synchronization process is not inserted, the random access may fail, and if the pre-synchronization process is inserted, the time delay is increased. Therefore, how to balance between reducing the time delay and improving the random access success rate is a technical problem to be solved. SUMMARY

[0003] Embodiments of the present application provide a random access method and a communication device, which limit the insertion of a pre-synchronization process before random access, ensure the necessity of inserting the pre-synchronization process, and balance between reducing the time delay and improving the random access success rate.

[0004] In a first aspect, embodiments of the present application provide a random access method, which comprises:

[0005] In a case where it is needed to access a network device, at least one parameter related to historical time and frequency deviation adjustment is acquired;

[0006] If the at least one parameter meets a synchronization condition, a pre-synchronization is performed between the network device and the terminal device before random access is initiated.

[0007] Based on the description of the first aspect, in a case where it is needed to access a network device, at least one parameter related to historical time and frequency deviation adjustment is acquired, and if the at least one parameter meets a synchronization condition, a pre-synchronization is needed to be performed between the network device and the terminal device before random access is initiated. In other words, the present application needs to perform a pre-synchronization between the network device and the terminal device before random access is initiated in a case where the at least one parameter related to historical time and frequency deviation adjustment meets a synchronization condition, that is, the insertion of a pre-synchronization process before random access is limited, the necessity of inserting the pre-synchronization process is ensured, and balance between reducing the time delay and improving the random access success rate is achieved.

[0008] In an optional implementation, the at least one parameter comprises at least one of the following:

[0009] a time-frequency offset adjustment amount in a historical pre-synchronization procedure;

[0010] a time-frequency offset adjustment amount in a historical paging procedure;

[0011] a signal quality of a historical received synchronization signal;

[0012] a signal-to-noise ratio of a historical received synchronization signal;

[0013] a time interval between a historical time-frequency offset adjustment and a reference time.

[0014] By this implementation, whether the pre-synchronization procedure needs to be inserted before the current random access is determined by the time-frequency offset adjustment related parameter in the historical pre-synchronization procedure and the time-frequency offset adjustment related parameter in the historical paging procedure, so as to determine the necessity of inserting the pre-synchronization procedure.

[0015] In an optional implementation, if the at least one parameter satisfies a synchronization condition, a pre-synchronization is performed between the network device and the terminal before the random access is initiated, comprising:

[0016] If the at least one parameter respectively satisfies a corresponding threshold condition, it is determined that the at least one parameter satisfies the synchronization condition, and a pre-synchronization is performed between the network device and the terminal before the random access is initiated.

[0017] By this implementation, if each parameter satisfies the corresponding threshold condition, a pre-synchronization needs to be performed between the network device and the terminal before the random access is initiated, so as to determine the necessity of inserting the pre-synchronization procedure.

[0018] In an optional implementation, the threshold condition corresponding to the time-frequency offset adjustment amount in the historical pre-synchronization procedure comprises that the time-frequency offset adjustment amount in the historical pre-synchronization procedure is greater than or equal to a first threshold value;

[0019] the threshold condition corresponding to the time-frequency offset adjustment amount in the historical paging procedure comprises that the time-frequency offset adjustment amount in the historical paging procedure is greater than or equal to a second threshold value;

[0020] the threshold condition corresponding to the signal quality of the historical received synchronization signal comprises that the signal quality of the historical received synchronization signal is less than or equal to a third threshold value;

[0021] the threshold condition corresponding to the signal-to-noise ratio of the historical received synchronization signal comprises that the signal-to-noise ratio of the historical received synchronization signal is less than or equal to a fourth threshold value;

[0022] The threshold condition corresponding to the time interval between the time of the historical time-frequency offset adjustment and the reference time comprises that the time interval between the time of the historical time-frequency offset adjustment and the reference time is greater than a fifth threshold value.

[0023] Through the embodiment, the threshold condition required to be met by each parameter is limited, thereby limiting the necessity of inserting the pre-synchronization procedure before the random access.

[0024] In an optional embodiment, the historical pre-synchronization procedure is a pre-synchronization procedure closest to the reference time.

[0025] The historical paging procedure is a paging procedure closest to the reference time and successfully decoding a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH).

[0026] The historical received synchronization signal is a synchronization signal received in a historical time period or a synchronization signal received in a pre-synchronization procedure closest to the reference time.

[0027] The historical time-frequency offset adjustment is a time-frequency offset adjustment in a pre-synchronization procedure closest to the reference time or a time-frequency offset adjustment in a historical paging procedure closest to the reference time.

[0028] Through the embodiment, the necessity of inserting the pre-synchronization procedure before the random access is further limited according to the parameter in the historical pre-synchronization procedure closest to the reference time and / or the historical paging procedure closest to the reference time and successfully decoding the PDCCH and the PDSCH.

[0029] In an optional embodiment, the at least one parameter related to the historical time-frequency offset adjustment is acquired in the case of needing to access the network device, comprising:

[0030] In the case of being in the idle state, if a user call request is received, it is determined that the network device needs to be accessed, and the at least one parameter related to the historical time-frequency offset adjustment is acquired.

[0031] Through the embodiment, the necessity of inserting the pre-synchronization procedure before the random access is limited in the call initiation scenario of the terminal device, thereby balancing between reducing the time delay and ensuring the call success rate.

[0032] In a second aspect, an embodiment of the present application provides a communication apparatus, which comprises units for implementing the method in any possible implementation manner of the first aspect.

[0033] In a third aspect, an embodiment of the present application provides a communication device, the communication device comprising a processor and a memory, the processor and the memory being connected to each other, the memory being configured to store a computer program, the computer program comprising program instructions, and the processor being configured to invoke the program instructions to execute the method according to the first aspect or any possible implementation of the first aspect.

[0034] In a fourth aspect, an embodiment of the present application provides a chip, the chip comprising a processor and an interface, the processor and the interface being coupled to each other; the interface being configured to receive or output a signal, and the processor being configured to execute code instructions to execute the method according to the first aspect or any possible implementation of the first aspect.

[0035] In a fifth aspect, an embodiment of the present application provides a module device, the module device comprising a communication module, a power module, a storage module and a chip module, wherein: the power module is configured to provide power for the module device; the storage module is configured to store data and / or instructions; the communication module is configured to communicate with an external device; and the chip module is configured to invoke the data and / or instructions stored in the storage module, in combination with the communication module, to execute the method according to the first aspect or any possible implementation of the first aspect.

[0036] In a sixth aspect, an embodiment of the present application provides a computer readable storage medium, the computer readable storage medium storing a computer program, the computer program comprising program instructions, and when an electronic device executes the program instructions, the method according to the first aspect or any possible implementation of the first aspect is implemented. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1a FIG. 1 is a structural schematic diagram of a communication system provided by an embodiment of the present application;

[0038] Figure 1b FIG. 2 is a timing diagram of a paging process without a calling process provided by an embodiment of the present application;

[0039] Figure 1c FIG. 3 is a timing diagram of a paging process with a calling process provided by an embodiment of the present application;

[0040] Figure 1d FIG. 4 is another timing diagram of a paging process with a calling process provided by an embodiment of the present application;

[0041] Figure 2 FIG. 5 is a flowchart of a random access method provided by an embodiment of the present application;

[0042] Figure 3 FIG. 6 is a flowchart of a judgment process of inserting a pre-synchronization process before random access provided by an embodiment of the present application;

[0043] Figure 4is a structural schematic diagram of a communication device provided by an embodiment of the present application;

[0044] Figure 5 is a structural schematic diagram of another communication device provided by an embodiment of the present application;

[0045] Figure 6 is a structural schematic diagram of a module device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0046] In the embodiments of the present application, unless otherwise specified, the character " / " represents that the associated objects before and after are in a relationship of one or the other. For example, A / B can represent A or B. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships. For example, A and / or B can represent three cases of A existing alone, A and B existing together, and B existing alone.

[0047] It should be noted that the "first", "second", and the like in the embodiments of the present application are only used for distinguishing purposes of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, nor can it be understood as indicating or implying the order.

[0048] In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. In addition, "at least one of the following" or the like means any combination of these items, which can include any combination of single item or multiple items. For example, at least one of A, B or C can represent A, B, C, A and B, A and C, B and C, or A, B and C. Wherein, each of A, B and C can be an element or a set containing one or more elements.

[0049] In the embodiments of the present application, "example", "in some embodiments", "in another embodiment" and the like are used to represent as an example, illustration or description. Any embodiment or design scheme described as "example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the word "example" is intended to present the concept in a specific manner.

[0050] In the embodiments of the present application, "of", "corresponding" and "corresponding" can be mixed sometimes, and it should be pointed out that the meanings to be expressed are consistent when the differences are not emphasized. In the embodiments of the present application, communication and transmission can be mixed sometimes, and it should be pointed out that the meanings to be expressed are consistent when the differences are not emphasized. For example, transmission can include sending and / or receiving, and can be a noun or a verb.

[0051] Equal to involved in the embodiments of the present application can be used with greater than, applicable to greater than the technical solutions adopted, also can be used with less than, applicable to less than the technical solutions adopted. It should be noted that when equal to is used with greater than, it cannot be used with less than; when equal to is used with less than, it cannot be used with greater than.

[0052] The following explains some terms involved in the embodiments of the present application, so as to facilitate the understanding of those skilled in the art.

[0053] 1. Terminal device. The terminal device in the embodiments of the present application is a device with wireless transceiving function, which can be referred to as terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal device, vehicle-mounted terminal device, industrial control terminal device, UE unit, UE station, mobile station, remote station, remote terminal device, mobile device, UE terminal device, wireless communication device, UE agent or UE apparatus, etc. The terminal device can be fixed or mobile. It should be noted that the terminal device can support at least one wireless communication technology, such as long term evolution (LTE), new radio (NR), etc. For example, the terminal device can be a mobile phone, a pad, a desktop computer, a notebook computer, an all-in-one machine, a vehicle-mounted terminal, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a future mobile communication network or a terminal device in a future evolved public land mobile network (PLMN), etc. In some embodiments of the present application, the terminal device can also be a device with transceiving function, such as a chip system. The chip system can include a chip and can also include other discrete devices.

[0054] 2、Network device. The network device in the embodiments of the present application is a device that provides wireless communication function for a terminal device, and can also be referred to as an access network device, a radio access network (RAN) device, etc. The network device can support at least one wireless communication technology, such as LTE, NR, etc. For example, the network device includes, but is not limited to, a generation nodeB (gNB) in a 5th-generation (5G) mobile communication system, an evolved node B (eNB), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., a home evolved node B or a home nodeB, HNB), a baseband unit (BBU), a transmitting and receiving point (TRP), a transmitting point (TP), a mobile switching center, etc. The network device can also be a radio controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and a network device in future mobile communication or a network device in future evolved PLMN, etc. In some embodiments, the network device can also be a chip system having a function of providing wireless communication for a terminal device. For example, the chip system can include a chip and can also include other discrete devices.

[0055] Please refer to Figure 1a , Figure 1a is a structural schematic diagram of a communication system provided by the embodiments of the present application. The communication system can include, but is not limited to, one or more network devices and one or more terminal devices, such as Figure 1a Take one network device 101 and one terminal device 102 as an example, wherein, Figure 1a The network device 101 in the embodiment is taken as an example of a base station, and the terminal device 102 is taken as an example of a mobile phone. The terminal device 102 can establish a wireless link with the network device 101 to communicate. Figure 1a The communication system shown includes, but is not limited to, network devices and terminal devices, and can also include other communication devices,Figure 1a The number and form of the devices shown are for illustrative purposes and do not constitute a limitation on the embodiments of this application.

[0056] Please refer to Figure 1b This is a timing diagram of paging processing without a calling process provided in an embodiment of this application. The paging cycle is typically 1.28 seconds. Before the terminal device determines that the paging cycle has arrived, the terminal device will perform a pre-synchronization process to ensure that the paging signal is within the demodulation range. Typically, the terminal device performs pre-synchronization through the SSB signal sent by the network device, determines the time-frequency offset adjustment amount, and performs time-frequency offset adjustment. In this application, pre-synchronization via SSB can be simply referred to as time-frequency offset adjustment during the pre-synchronization process.

[0057] After pre-synchronization, the terminal device parses the Physical Downlink Control Channel (PDCCH). If the PDCCH parsing is successful, it obtains the Paging Radio Network Temporary Identity (P-RNTI). Then, it parses the Physical Downlink Shared Channel (PDSCH) indicated by the P-RNTI to obtain the paging message. It can be understood that when the terminal device successfully parses the PDCCH / PDSCH, it can use the Demodulation Reference Signal (DMRS) in the PDCCH / PDSCH for time and frequency offset adjustment. This time and frequency offset adjustment using the DMRS in the PDCCH / PDSCH during paging can be simply referred to as time and frequency offset adjustment during the paging process.

[0058] Please refer to Figure 1c This is a paging processing timing diagram with a calling process provided in an embodiment of this application, such as... Figure 1c As shown, the user initiates a calling request, waking up the physical layer via MAC-RACH, thereby prematurely waking up the terminal device. In existing technologies, the terminal device directly initiates random access after being woken up. This method may lead to random access failure because there is no pre-synchronization process with network devices.

[0059] Please refer to Figure 1d This is another paging processing timing diagram with a calling process provided in an embodiment of this application, such as... Figure 1cAs shown, in the embodiment of the present application, after the terminal device is woken up, it is needed to determine whether pre-synchronization is needed before random access. If pre-synchronization is needed before random access, pre-synchronization process is performed first, time-frequency offset adjustment is performed, and then the terminal device is randomly accessed to the network device to ensure the success rate of random access. If pre-synchronization is not needed before random access, the terminal device can be directly randomly accessed to reduce the time delay. The specific determination method of whether pre-synchronization is needed before random access can refer to the description of the subsequent embodiments, which will not be repeated here.

[0060] In the present application, the pre-synchronization process before random access is limited to ensure the necessity of inserting the pre-synchronization process, so as to balance between reducing time delay and improving the success rate of random access, and ensure the necessity of inserting the pre-synchronization process. That is, if the pre-synchronization process is not inserted, the random access of the current calling service is probably failed. That is, if the random access is successful without inserting the pre-synchronization process, it is not necessary to insert the pre-synchronization process before random access.

[0061] It can be understood that the above-mentioned calling service as a trigger for terminal device to perform random access is only an example, and the terminal device can also need to access the network device in other scenarios, which is not limited in the present application.

[0062] As shown in the embodiment of the random access method provided by the present application, the method can include but is not limited to the following steps: Figure 2 As shown in the embodiment of the random access method provided by the present application, the method can include but is not limited to the following steps: Figure 2 As shown in the embodiment of the random access method provided by the present application, the method can include but is not limited to the following steps:

[0063] 101, in the case of needing to access the network device, at least one parameter related to historical time-frequency offset adjustment is obtained.

[0064] When the terminal device is in idle state, the user calling request is detected, and it is determined that the terminal device needs to access the network device, wherein the user calling request can be that the user requests to make an outbound call by operating the terminal device. Further, the terminal device is woken up, and at least one parameter related to historical time-frequency offset adjustment is obtained. The at least one parameter related to historical time-frequency offset adjustment includes at least one of the following:

[0065] 1. Time-frequency offset adjustment amount in historical pre-synchronization process. The historical pre-synchronization process can be the pre-synchronization process closest to the reference time. It can be understood that the pre-synchronization process can be the synchronization between the terminal device and the network device through the SSB signal. The reference time can be the wake-up time of the terminal device. Obtain the time-frequency offset adjustment amount ad1 in the historical pre-synchronization process. It can be understood that the historical pre-synchronization process can also refer to at least one pre-synchronization process in the historical time period, and the time-frequency offset adjustment amount ad1 in the historical pre-synchronization process can be the average time-frequency offset adjustment amount / the smallest time-frequency offset adjustment amount / the largest time-frequency offset adjustment amount of the at least one pre-synchronization process, and the like.

[0066] 2. Time-frequency offset adjustment amount in historical paging process. The historical paging process can be the paging process closest to the reference time and successfully decoding PDCCH / PDSCH. It can be understood that in the paging process, the terminal device can adjust the time-frequency offset through the DMRS in the PDCCH / PDSCH. Obtain the time-frequency offset adjustment amount ad2 in the historical paging process. It can be understood that the historical paging process can also refer to at least one paging process in the historical time period, and the time-frequency offset adjustment amount ad2 in the historical paging process can be the average time-frequency offset adjustment amount / the smallest time-frequency offset adjustment amount / the largest time-frequency offset adjustment amount of the at least one paging process, and the like.

[0067] 3. Signal quality of historical received synchronization signal. The synchronization signal can be the SSB received in the historical pre-synchronization process. The historical received synchronization signal can be the synchronization signal received in the historical time period, or the synchronization signal received in the pre-synchronization process closest to the reference time. Obtain the signal quality of the historical received synchronization signal, wherein the signal quality of the synchronization signal can be represented by the reference signal receiving power (RSRP). The signal quality of the synchronization signal received in the historical time period can be the average signal quality of the synchronization signal received in the historical time period.

[0068] 4. Signal-to-noise ratio of historical received synchronization signal. The synchronization signal can be the SSB received in the historical pre-synchronization process. The historical received synchronization signal can be the synchronization signal received in the historical time period, or the synchronization signal received in the pre-synchronization process closest to the reference time. Obtain the signal-to-noise ratio of the historical received synchronization signal.

[0069] 5. a time interval between the historical time-frequency offset adjustment and the reference time. The reference time can be a wake-up time of the terminal device. The historical time-frequency offset adjustment can be a time-frequency offset adjustment in a historical pre-synchronization procedure or a time-frequency offset adjustment in a historical paging procedure. For example, the historical time-frequency offset adjustment can be a time-frequency offset adjustment in a pre-synchronization procedure closest to the reference time or a time-frequency offset adjustment in a paging procedure closest to the reference time, i.e., a time interval between the time-frequency offset adjustment closest to the reference time and the reference time is determined.

[0070] It can be understood that the above parameters are only examples, and other parameters can also be included, which are not limited in the present application. In some embodiments, the historical pre-synchronization procedure described above can refer to a pre-synchronization procedure performed before a historical paging procedure, i.e., a pre-synchronization procedure performed by the terminal device for receiving a paging message.

[0071] 102. If the at least one parameter satisfies a synchronization condition, performing pre-synchronization between the terminal device and the network device before initiating random access.

[0072] After determining the at least one parameter related to the historical time-frequency offset adjustment, it is further determined whether the terminal device needs to perform pre-synchronization with the network device before initiating random access according to the at least one parameter. If the at least one parameter satisfies the synchronization condition, it is determined that the terminal device needs to perform pre-synchronization with the network device before initiating random access to ensure the success rate of random access.

[0073] It can be understood that if the at least one parameter does not satisfy the synchronization condition, it is determined that the terminal device does not need to perform pre-synchronization before initiating random access, thereby reducing the time delay. When the terminal device does not need to perform pre-synchronization before initiating random access, the terminal device can directly initiate a random access procedure.

[0074] In some embodiments, the synchronization condition can be constrained in various forms. For example, the synchronization condition can mean that the at least one parameter satisfies a constraint relationship, which is expressed by a formula, i.e., the at least one parameter is mathematically modeled as at least one variable. For example, the synchronization condition can mean that the at least one parameter satisfies a corresponding threshold condition, i.e., one parameter corresponds to one threshold condition. The threshold conditions corresponding to the above parameters 1-5 are described below.

[0075] If the at least one parameter includes the time-frequency offset adjustment amount in the historical pre-synchronization procedure, the threshold condition corresponding to the parameter includes: the time-frequency offset adjustment amount in the historical pre-synchronization procedure is greater than or equal to a first threshold value. In other words, if the time-frequency offset adjustment amount in the historical pre-synchronization procedure is greater than or equal to the first threshold value, it is determined that the time-frequency offset adjustment amount in the historical pre-synchronization procedure satisfies the corresponding threshold condition.

[0076] If the at least one parameter comprises the time-frequency offset adjustment amount in the historical paging procedure, the threshold condition corresponding to the parameter comprises: the time-frequency offset adjustment amount in the historical paging procedure is greater than or equal to a second threshold value. In other words, if the time-frequency offset adjustment amount in the historical paging procedure is greater than or equal to the second threshold value, it is determined that the time-frequency offset adjustment amount in the historical paging procedure satisfies the corresponding threshold condition.

[0077] If the at least one parameter comprises the signal quality of the historical received synchronization signal, the threshold condition corresponding to the parameter comprises: the signal quality of the historical received synchronization signal is less than or equal to a third threshold value. In other words, if the signal quality of the historical received synchronization signal is less than or equal to the third threshold value, it is determined that the signal quality of the historical received synchronization signal satisfies the corresponding threshold condition.

[0078] If the at least one parameter comprises the signal-to-noise ratio of the historical received synchronization signal, the threshold condition corresponding to the parameter comprises: the signal-to-noise ratio of the historical received synchronization signal is less than or equal to a fourth threshold value. In other words, if the signal-to-noise ratio of the historical received synchronization signal is less than or equal to the fourth threshold value, it is determined that the signal-to-noise ratio of the historical received synchronization signal satisfies the corresponding threshold condition.

[0079] If the at least one parameter comprises the time interval between the historical time-frequency offset adjustment and the reference time, the threshold condition corresponding to the parameter comprises: the time interval is greater than a fifth threshold value. In other words, if the time interval is greater than the fifth threshold value, it is determined that the time interval satisfies the corresponding threshold condition.

[0080] If the at least one parameter satisfies the corresponding threshold condition respectively, it is determined that the at least one parameter satisfies the synchronization condition. For example, the at least one parameter comprises the time-frequency offset adjustment amount in the historical pre-synchronization procedure, the time-frequency offset adjustment amount in the historical paging procedure, the signal quality of the historical received synchronization signal, the signal-to-noise ratio of the historical received synchronization signal, and the time interval. If the time-frequency offset adjustment amount in the historical pre-synchronization procedure is greater than or equal to the first threshold value; and the time-frequency offset adjustment amount in the historical paging procedure is greater than or equal to the second threshold value; and the signal quality of the historical received synchronization signal is less than or equal to the third threshold value; and the signal-to-noise ratio of the historical received synchronization signal is less than or equal to the fourth threshold value; and the time interval is greater than the fifth threshold value, the terminal device needs to be pre-synchronized before randomly accessing the network device. Specifically, the terminal device can be pre-synchronized by the SSB signal closest to the current time after the current time.

[0081] If there is a parameter in the at least one parameter that does not satisfy the corresponding threshold condition, it is determined that the at least one parameter does not satisfy the synchronization condition, i.e., pre-synchronization is not needed before random access, and random access can be directly initiated.

[0082] In some embodiments, different time interval determination conditions can also be set for different ranges of the historical time-frequency offset adjustment amount, respectively. The larger the historical time-frequency offset adjustment amount, the more stringent the time interval requirement. For example, when the historical time-frequency offset adjustment amount is greater than or equal to a first value, the comparison threshold value (i.e., the fifth threshold value) of the time interval is a first time threshold value; when the historical time-frequency offset adjustment amount is less than the first value and greater than or equal to a second value, the comparison threshold value (i.e., the fifth threshold value) is a second time threshold value, and the first time threshold value is less than the second time threshold value.

[0083] In the case of needing to access the network device, at least one parameter related to the historical time-frequency offset adjustment is obtained, and if the at least one parameter satisfies the synchronization condition, pre-synchronization between the network device and the terminal device is required before initiating random access. In other words, the present application requires pre-synchronization between the network device and the terminal device before initiating random access in the case that at least one parameter related to the historical time-frequency offset adjustment satisfies the synchronization condition, that is, the pre-synchronization process before random access is limited to ensure the necessity of inserting the pre-synchronization process, thereby balancing between reducing the time delay and improving the success rate of random access.

[0084] Please refer to Figure 3 An example of a random access method provided by an embodiment of the present application is shown in the figure, which includes but is not limited to the following steps:

[0085] 201, the terminal device initiates a calling service and wakes up the physical layer (PHY) in advance.

[0086] 202, whether the time interval between the time when the terminal device wakes up and the time of the last pre-synchronization is greater than the fifth threshold value. If the result of the judgment is no, step 210 is executed, and if the result of the judgment is yes, step 203 is executed.

[0087] 203, whether the SNR of the SSB is less than the fourth threshold value. If the result of the judgment is no, step 210 is executed, and if the result of the judgment is yes, step 204 is executed.

[0088] The SSB can be the SSB in the last historical pre-synchronization process closest to the time when the terminal device wakes up.

[0089] 204, whether the RSRP of the SSB is less than the third threshold value. If the result of the judgment is no, step 210 is executed, and if the result of the judgment is yes, step 205 is executed.

[0090] The SSB can be the SSB in the last historical pre-synchronization process closest to the time when the terminal device wakes up, or the SSB received by the terminal device in a historical period of time.

[0091] 205, whether ad1 is greater than a first threshold value. If the result of the judgment is no, step 210 is executed, and if the result of the judgment is yes, step 206 is executed.

[0092] ad1 is the time-frequency offset adjustment recorded in the historical pre-synchronization process, for example, the time-frequency offset adjustment recorded in the last pre-synchronization process before the terminal device wakes up.

[0093] 206, whether ad2 is greater than a second threshold value. If the result of the judgment is no, step 210 is executed, and if the result of the judgment is yes, step 207 is executed.

[0094] ad2 is the time-frequency offset adjustment recorded in the historical paging process, for example, the time-frequency offset adjustment recorded in the last paging process before the terminal device wakes up. The paging process refers to the paging process in which PDCCH / PDSCH decoding is successful.

[0095] 207, find the last SSB, and complete pre-synchronization by receiving the SSB.

[0096] 208, perform time-frequency offset adjustment.

[0097] 209, initiate random access.

[0098] 210, no need to perform pre-synchronization, and directly initiate random access.

[0099] In other words, step 210 is executed, which means that no pre-synchronization is needed before initiating random access.

[0100] Please refer to Figure 4 , Figure 4 is a structural schematic diagram of a communication device provided by an embodiment of the present application. The device can be a terminal device, or a device in the terminal device, for example, a chip or a chip module in the terminal device, or a device that can be matched with the terminal device. Figure 4 The communication device 300 shown can include an acquisition unit 301 and a random access unit 302. Wherein:

[0101] The acquisition unit 301 is configured to acquire at least one parameter related to historical time-frequency offset adjustment in the case of needing to access a network device;

[0102] The random access unit 302 is configured to perform pre-synchronization between the network device before initiating random access if the at least one parameter meets a synchronization condition.

[0103] In a possible implementation manner, the at least one parameter includes at least one of the following:

[0104] a time-frequency offset adjustment in a historical pre-synchronization process;

[0105] a time-frequency offset adjustment amount in a historical paging procedure;

[0106] a signal quality of a historical received synchronization signal;

[0107] a signal-to-noise ratio of a historical received synchronization signal;

[0108] a time interval between a time of a historical time-frequency offset adjustment and a reference time.

[0109] In a possible implementation, the random access unit 302 is specifically configured to: if the at least one parameter respectively meets a corresponding threshold condition, determine that the at least one parameter meets a synchronization condition, and perform pre-synchronization with the network device before initiating random access.

[0110] In a possible implementation, the threshold condition corresponding to the time-frequency offset adjustment amount in the historical pre-synchronization procedure includes that the time-frequency offset adjustment amount in the historical pre-synchronization procedure is greater than or equal to a first threshold value.

[0111] The threshold condition corresponding to the time-frequency offset adjustment amount in the historical paging procedure includes that the time-frequency offset adjustment amount in the historical paging procedure is greater than or equal to a second threshold value.

[0112] The threshold condition corresponding to the signal quality of the historical received synchronization signal includes that the signal quality of the historical received synchronization signal is less than or equal to a third threshold value.

[0113] The threshold condition corresponding to the signal-to-noise ratio of the historical received synchronization signal includes that the signal-to-noise ratio of the historical received synchronization signal is less than or equal to a fourth threshold value.

[0114] The threshold condition corresponding to the time interval between the time of the historical time-frequency offset adjustment and the reference time includes that the time interval between the time of the historical time-frequency offset adjustment and the reference time is greater than a fifth threshold value.

[0115] In a possible implementation, the historical pre-synchronization procedure is a pre-synchronization procedure closest to a reference time.

[0116] The historical paging procedure is a paging procedure closest to a reference time and successfully decoding a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH).

[0117] The historical received synchronization signal is a synchronization signal received in a historical time period or a synchronization signal received in a pre-synchronization procedure closest to a reference time.

[0118] The historical time-frequency offset adjustment is a time-frequency offset adjustment in a pre-synchronization process closest to a reference time or a time-frequency offset adjustment in a historical paging process closest to the reference time.

[0119] In a possible implementation, the obtaining unit 301 is specifically configured to: in a case of being in an idle state, if a user calling request is received, determining that network access is needed, and obtaining at least one parameter related to a historical time-frequency offset adjustment.

[0120] Details are refer to the related content of the method embodiments.

[0121] Please refer to Figure 5 , Figure 5 is a structural schematic diagram of another communication apparatus provided by the embodiment of the present application, which is used for implementing the functions of the terminal device in the above Figure 2 , Figure 3 The communication apparatus 400 can be a terminal device or an apparatus for a terminal device. The apparatus for a terminal device can be a chip system or a chip in the terminal device. The chip system can be composed of a chip, or can include the chip and other discrete devices.

[0122] The communication apparatus 400 includes at least one processor 420, which is used for implementing the data processing function of the terminal device or the network device in the method provided by the embodiment of the present application. The communication apparatus 400 can also include a communication interface 410, which is used for implementing the transceiving operation of the terminal device or the network device in the method provided by the embodiment of the present application. In the embodiment of the present application, the processor 420 can be a central processing unit (CPU), and the processor can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. In the embodiment of the present application, the communication interface 410 can be a transceiver, a circuit, a bus, a module or other types of communication interfaces, which are used for communicating with other devices through a transmission medium. For example, the communication interface 410 is used for the apparatus in the communication apparatus 400 to communicate with other devices. The processor 420 transceives data by using the communication interface 410, and is used for implementing the above method embodiments Figure 2 or Figure 3 the method.

[0123] The communication apparatus 400 can further include at least one memory 430 for storing program instructions and / or data. The memory 430 is coupled to the processor 420. The coupling between the units, modules or components in the embodiments of the present application is indirect coupling or communication connection between the units, modules or components, which can be electrical, mechanical or other forms, for information interaction between the units, modules or components. The processor 420 can operate in cooperation with the memory 430. The processor 420 can execute the program instructions stored in the memory 430. At least one of the at least one memory can be included in the processor.

[0124] When the communication apparatus 400 is powered on, the processor 420 can read the software program in the memory 430, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 420 performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit (not shown) for radio frequency processing. The radio frequency circuit converts the baseband signal into a radio frequency signal, and transmits the radio frequency signal in the form of an electromagnetic wave through the antenna. When data is transmitted to the communication apparatus 400, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 420. The processor 420 converts the baseband signal into data and processes the data. Figure 5

[0125] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor 420 performing baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication apparatus.

[0126] The specific connection medium between the communication interface 410, the processor 420 and the memory 430 in the embodiments of the present application is not limited. In the embodiments of the present application, the memory 430, the processor 420 and the communication interface 410 are connected through a bus 440, and the bus is represented by a thick line in the drawings. The connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is used to represent the bus in the drawings, but it does not mean that there is only one bus or only one type of bus. Figure 4 Figure 4 Figure 4 The communication apparatus 400 is specifically used for a terminal device, for example, the communication apparatus 400 is specifically a chip or a chip system, and the communication interface 410 can output or receive a baseband signal. The communication apparatus 400 is specifically a terminal device, and the communication interface 410 can output or receive a radio frequency signal.

[0127] The communication apparatus 400 is specifically used for a terminal device, for example, the communication apparatus 400 is specifically a chip or a chip system, and the communication interface 410 can output or receive a baseband signal. The communication apparatus 400 is specifically a terminal device, and the communication interface 410 can output or receive a radio frequency signal.

[0128] ​​​It should be noted that the communication apparatus can perform the related steps of the terminal device in the foregoing method embodiments. For details, refer to the implementation manners provided by each step. Details are not described here.

[0129] For each device, product, and module included therein applied to or integrated into the communication apparatus, each module can be implemented in the form of hardware such as a circuit, different modules can be located in the same component (for example, a chip, a circuit module, or the like) or different components in the terminal, or at least part of the modules can be implemented in the form of a software program running on a processor integrated in the terminal, and the remaining (if any) part of the modules can be implemented in the form of hardware such as a circuit.

[0130] The memory described above can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically eprom (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0131] Embodiments of the present application provide a chip. The chip comprises a processor and a memory. Wherein the number of processors can be one or more, and the number of memories can be one or more. The processor can execute the steps of the random access method shown in the above Figure 2 or Figure 3 and the steps performed by the related embodiments by reading the instructions and data stored on the memory.

[0132] As Figure 6 shown, Figure 6 is a structural schematic diagram of a module device provided by an embodiment of the present application. The module device 500 can execute the related steps of the terminal device in the foregoing method embodiments. The module device 500 includes a communication module 501, a power module 502, a storage module 503, and a chip module 504. The power module 502 is configured to provide power for the module device. The storage module 503 is configured to store data and / or instructions. The communication module 501 is configured to communicate with an external device. The chip module 504 is configured to invoke the data and / or instructions stored in the storage module 503, and in combination with the communication module 501, can execute the random access method as shown in Figure 2 or Figure 3 and the steps executed by the related embodiments.

[0133] An embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and the computer program includes program instructions. When an electronic device executes the program instructions, the steps executed by the terminal device in the random access method as shown in Figure 2 or Figure 3 are implemented.

[0134] The computer-readable storage medium can be an internal storage unit of the terminal device, for example, a hard disk or a memory of the device. The computer-readable storage medium can also be an external storage device of the terminal device or the network device, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like. Further, the computer-readable storage medium can include both the internal storage unit and the external storage device of the terminal device or the network device. The computer-readable storage medium is used to store the computer program and other programs and data required by the terminal device or the network device. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output. The computer-readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, a data center, and the like, including one or a collection of available media. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium. The semiconductor medium can be a solid state disk.

[0135] The various modules / units included in the various devices and products described in the above embodiments can be software modules / units or hardware modules / units, or partially software modules / units and partially hardware modules / units. For example, for the various devices and products applied to or integrated into a chip, the various modules / units included therein can all be implemented in the form of hardware such as circuitry, or at least some of the modules / units can be implemented in the form of software programs running on a processor integrated into the chip, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuitry; for the various devices and products applied to or integrated into a chip module, the various modules / units included therein can all be implemented in the form of hardware such as circuitry, and different modules / units can be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules / units can be implemented in the form of software programs running on a processor integrated into the chip module, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuitry; for the various devices and products applied to or integrated into a data acquisition node, the various modules / units included therein can all be implemented in the form of hardware such as circuitry, and different modules / units can be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the terminal, or at least some of the modules / units can be implemented in the form of software programs running on a processor integrated into the data acquisition node, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuitry.

[0136] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are wholly or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another, for example, the computer instructions can be transferred from one website, computer, server, or data center to another via wired or wireless means.

[0137] It should be understood that, in various embodiments of the present application, the size of the serial numbers of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to their functions and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0138] In several embodiments provided in the present application, it should be understood that the disclosed methods, devices and systems can be implemented in other manners. For example, the above described device embodiments are merely illustrative; for example, the division of the units is only a logical function division, and there can be another division manner in actual implementation; for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different units, can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0139] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0140] In addition, each functional unit in the various embodiments of the present application can be integrated in one processing unit, or each unit can be physically included separately, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware, or in the form of hardware plus software functional units.

[0141] The integrated unit realized in the form of software functional units can be stored in a computer readable storage medium. The software functional units stored in a storage medium include a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a gateway node, etc.) to execute part of the steps of the methods described in the various embodiments of the present application.

[0142] Those of ordinary skill in the art can understand that all or part of the above described embodiment methods can be completed by a computer program instructing relevant hardware, and the program can be stored in a computer readable storage medium, and when the program is executed, it can include the flow of the above described embodiments of the methods. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM) or a random access memory (RAM), etc.

[0143] The above disclosure is only a preferred embodiment of the present application, and of course cannot limit the scope of the rights of the present application, and those of ordinary skill in the art can understand that all or part of the above described embodiments can be implemented, and equivalent changes made according to the claims of the present application, still belong to the scope covered by the application.

Claims

1. A random access method, characterized by, include: When in an idle state, a user call request is detected, and at least one parameter related to historical time-frequency offset adjustment is obtained. The user call request is a request made by the user to make an outbound call by operating the terminal device. If at least one parameter satisfies the synchronization condition, pre-synchronization is performed between the terminal device and the network device before initiating random access. The pre-synchronization is performed by the terminal device determining the time-frequency offset adjustment amount through the synchronization signal block SSB sent by the network device and then adjusting the time-frequency offset.

2. The method of claim 1, wherein, The at least one parameter includes at least one of the following: The time-frequency offset adjustment during the historical pre-synchronization process; Time and frequency offset adjustment during historical paging processes; The signal quality of historically received synchronization signals; The signal-to-noise ratio of historically received synchronization signals; The time interval between the historical time-frequency offset adjustment time and the reference time.

3. The method of claim 2, wherein, If at least one parameter satisfies the synchronization condition, then pre-synchronization with the network device is performed before initiating random access, including: If at least one parameter satisfies the corresponding threshold condition, then it is determined that at least one parameter satisfies the synchronization condition, and pre-synchronization is performed between the parameter and the network device before initiating random access.

4. The method of claim 3, wherein, The threshold conditions corresponding to the time-frequency offset adjustment amount in the historical pre-synchronization process include: the time-frequency offset adjustment amount in the historical pre-synchronization process is greater than or equal to the first threshold value; The threshold conditions corresponding to the time-frequency offset adjustment amount in the historical paging process include: the time-frequency offset adjustment amount in the historical paging process is greater than or equal to the second threshold value; The threshold conditions corresponding to the signal quality of the historically received synchronization signal include: the signal quality of the historically received synchronization signal is less than or equal to the third threshold value; The threshold condition corresponding to the signal-to-noise ratio of the historically received synchronization signal includes: the signal-to-noise ratio of the historically received synchronization signal is less than or equal to the fourth threshold value; The threshold condition corresponding to the time interval between the historical time-frequency offset adjustment time and the reference time includes: the time interval between the historical time-frequency offset adjustment time and the reference time is greater than the fifth threshold value.

5. The method according to any one of claims 2 to 4, wherein, The historical pre-synchronization process is the pre-synchronization process closest to the reference time; The historical paging process is the paging process that is closest to the reference time and successfully decodes the Physical Downlink Control Channel (PDCCH) and Physical Downlink Shared Channel (PDSCH). The historically received synchronization signal is either a synchronization signal received within a historical time period or a synchronization signal received during the pre-synchronization process closest to the reference time. The historical time and frequency offset adjustment refers to the time and frequency offset adjustment in the pre-synchronization process closest to the reference time or the time and frequency offset adjustment in the historical paging process closest to the reference time.

6. A communication device, characterized by include: The acquisition unit is used to acquire at least one parameter related to historical time-frequency offset adjustment when network access is required; A random access unit is configured to perform pre-synchronization with the network device before initiating random access if at least one parameter satisfies the synchronization condition.

7. The apparatus of claim 6, wherein, The at least one parameter includes at least one of the following: The time-frequency offset adjustment during the historical pre-synchronization process; Time and frequency offset adjustment during historical paging processes; The signal quality of historically received synchronization signals; a signal-to-noise ratio of a historical received synchronization signal; a time interval between a time of a historical time-frequency offset adjustment and a reference time.

8. The apparatus of claim 7, wherein, The random access unit is specifically configured to: if the at least one parameter respectively meets a corresponding threshold condition, determine that the at least one parameter meets a synchronization condition, and perform pre-synchronization between the network device and the communication apparatus before initiating random access.

9. The apparatus of claim 8, wherein, The threshold condition corresponding to the amount of time-frequency offset adjustment in the historical pre-synchronization process includes that the amount of time-frequency offset adjustment in the historical pre-synchronization process is greater than or equal to a first threshold value. The threshold condition corresponding to the amount of time-frequency offset adjustment in the historical paging process includes that the amount of time-frequency offset adjustment in the historical paging process is greater than or equal to a second threshold value. The threshold condition corresponding to the signal quality of the historical received synchronization signal includes that the signal quality of the historical received synchronization signal is less than or equal to a third threshold value. The threshold condition corresponding to the signal-to-noise ratio of the historical received synchronization signal includes that the signal-to-noise ratio of the historical received synchronization signal is less than or equal to a fourth threshold value. The threshold condition corresponding to the time interval between the time of the historical time-frequency offset adjustment and the reference time includes that the time interval between the time of the historical time-frequency offset adjustment and the reference time is greater than a fifth threshold value.

10. The device of any one of claims 7-9, wherein, The historical pre-synchronization process is a pre-synchronization process closest to a reference time. The historical paging process is a paging process closest to a reference time and successfully decoding a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH). The historical received synchronization signal is a synchronization signal received in a historical time period or a synchronization signal received in a pre-synchronization process closest to a reference time. The historical time-frequency offset adjustment is a time-frequency offset adjustment in a pre-synchronization process closest to a reference time or a time-frequency offset adjustment in a historical paging process closest to a reference time.

11. A communications device, characterized by The communication apparatus includes a processor and a memory, the processor and the memory are connected to each other, wherein the memory is used to store a computer program, the computer program includes program instructions, the processor invokes the program instructions to execute the method in any one of claims 1 to 5.

12. A chip, characterized by The chip includes a processor and an interface, the processor and the interface are coupled; the interface is used to receive or output signals, and the processor is used to execute code instructions to execute the method in any one of claims 1 to 5.

13. A modular device, comprising: The module device includes a communication module, a power module, a storage module, and a chip module, wherein: The power module is used to provide power for the module device; The storage module is used to store data and / or instructions; The communication module is used to communicate with external devices; The chip module is used to invoke data and / or instructions stored in the storage module, and execute the method in any one of claims 1 to 5 in combination with the communication module.

14. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, the computer program includes program instructions, when the electronic device executes the program instructions, the method in any one of claims 1 to 5 is realized.

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