CN111526522A

CN111526522A - Method and device for residing in cell

Info

Publication number: CN111526522A
Application number: CN201910103577.8A
Authority: CN
Inventors: 酉春华; 黄曲芳; 郭英昊; 耿婷婷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2020-08-11
Anticipated expiration: 2039-02-01
Also published as: CN111526522B

Abstract

The application provides a method and a device for residing in a cell. The method comprises the following steps: the network device carries the first part of the PLMN to the PBCH, so that the terminal device can detect the first part of the PLMN of the first cell from the PBCH, and then can quickly determine whether the first cell meets the first condition of cell residence according to the detected first part of the PLMN of the first cell and the corresponding part of the PLMN selected by the terminal device, thereby achieving the purpose of preliminarily determining whether the first cell is a cell where the first cell can reside, and not needing to detect SIB1 to preliminarily determine whether the first cell is a cell where the first cell can reside as in the prior art, thereby reducing the possibility of invalid measurement of the terminal device, and further helping to reduce the overhead of the terminal device.

Description

Method and device for residing in cell

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to a method and an apparatus for camping on a cell.

Background

In a Long Term Evolution (LTE) system, one cell corresponds to one frequency point, one frequency point is used by only one operator, and one operator corresponds to one Public Land Mobile Network (PLMN). The process of selecting the resident cell by the terminal device is roughly as follows: the terminal equipment obtains the cell quality by measuring the reference signal, and reads a system Information block 1 (SIB 1) from a Physical Broadcast Channel (PBCH), and SIB1 carries the PLMN identifier. And if the PLMN in the SIB1 is consistent with the PLMN selected by the terminal equipment and the cell quality meets the residing condition, the terminal equipment determines to reside in the cell.

In a New Radio (NR) system, an unlicensed spectrum is introduced, in which one frequency point may be used by two or more operators together, and different operators correspond to different PLMNs. Therefore, if the cell camping method of LTE is also used in NR, multiple types of SIBs 1 may be transmitted in the same cell, and one type of SIB1 carries one PLMN.

The problems of the method are as follows: when the same cell sends the SIB1, a situation of channel preemption may occur, which may cause that the SIB1 carrying the PLMN is delayed for a long time before being sent to the terminal device and the terminal device finally finds that the PLMN in the SIB1 is inconsistent, thereby causing that the cell measurement performed by the terminal device on the cell during the time before detecting the PLMN in the SIB1 is invalid, which wastes overhead of the terminal device.

Disclosure of Invention

The application provides a method and a device for residing in a cell, which are used for saving terminal equipment overhead.

In a first aspect, the present application provides a method for camping on a cell, including: the method comprises the steps that terminal equipment detects PBCH of a first cell, wherein the PBCH carries a first part of PLMN of the first cell; the terminal equipment determines whether the first cell meets a first condition of cell residence according to the first part of the PLMN of the first cell and the corresponding part of the PLMN selected by the terminal equipment. Based on the scheme, the network device carries the first part of the PLMN to the PBCH, so that the terminal device can detect the first part of the PLMN of the first cell from the PBCH, and further can quickly determine whether the first cell meets the first condition of cell residence according to the detected first part of the PLMN of the first cell and the corresponding part of the PLMN selected by the terminal device, thereby achieving the purpose of preliminarily determining whether the first cell is a cell where the first cell can reside, and not needing to detect the SIB1 as in the prior art to preliminarily determining whether the first cell is a cell where the first cell can reside, thereby reducing the possibility of invalid measurement of the terminal device, and further helping to reduce the overhead of the terminal device.

In a possible implementation method, when a first part of a PLMN of a first cell matches a corresponding part of a PLMN selected by a terminal device, the terminal device obtains another part of the PLMN of the first cell or the PLMN of the first cell; and when the PLMN selected by the terminal equipment comprises the PLMN of the first cell and the quality of the first cell meets a second condition of cell residence, the terminal equipment determines to reside in the first cell. Based on the scheme, when the first part of the PLMN of the first cell meets the first condition (i.e., the first part of the PLMN of the first cell matches the corresponding part of the PLMN selected by the terminal device), the terminal device obtains the other part of the PLMN of the first cell or the PLMN of the first cell, and when the PLMN selected by the terminal device includes the PLMN of the first cell and the quality of the first cell meets the second condition that the cell resides, the terminal device determines to reside in the first cell, thereby realizing selection of a resident cell meeting the requirement for the terminal device.

In one possible implementation method, the terminal device determines the quality of the cell according to at least one of Reference Signal Receiving Quality (RSRQ), Reference Signal Receiving Power (RSRP), and Received Signal Strength Indication (RSSI).

In a possible implementation method, the terminal device obtains the other part of the PLMN of the first cell or the PLMN of the first cell from the system information.

In one possible implementation, when the first portion of the PLMN of the first cell does not match the corresponding portion of the PLMN selected by the terminal device, the terminal device continues to perform cell search to camp on other cells. Based on the scheme, when the first part of the PLMN of the first cell is not matched with the corresponding part of the PLMN selected by the terminal device, the terminal device determines that the first cell is a non-suitable cell or is excluded from suitable cells, and will not carry out cell measurement with the first cell, but continue to perform cell search to search for other cells meeting the conditions for residence, so that the measurement overhead of the first cell is reduced, and the overhead of the terminal device can be reduced.

In one possible implementation, the first part of the PLMN of the first cell is N lower bits than the PLMN of the first cell, and N is a positive integer.

In one possible implementation, the PBCH includes a Master Information Block (MIB) or physical layer signaling, which includes a first portion of a PLMN of the first cell.

In one possible implementation, the PLMN selected by the terminal device includes a registered PLMN, and/or an equivalent PLMN.

In a possible implementation method, before detecting the PBCH of the first cell, the terminal device determines to detect the PBCH of the first cell at the first frequency point according to the priority of the frequency point.

In a second aspect, the present application provides a method for camping on a cell, including: the network equipment generates information carried by a PBCH, wherein the information carried by the PBCH comprises a first part of a Public Land Mobile Network (PLMN) of a first cell, and the first part of the PLMN of the first cell is used for the terminal equipment to determine whether the first cell meets a first condition of cell residence; and the network equipment sends the information carried by the PBCH to the terminal equipment through the PBCH. Based on the scheme, the network device carries the first part of the PLMN to the PBCH, so that the terminal device can detect the first part of the PLMN of the first cell from the PBCH, and further can quickly determine whether the first cell meets the first condition of cell residence according to the detected first part of the PLMN of the first cell and the corresponding part of the PLMN selected by the terminal device, thereby achieving the purpose of preliminarily determining whether the first cell is a cell where the first cell can reside, and not needing to detect the SIB1 as in the prior art to preliminarily determining whether the first cell is a cell where the first cell can reside, thereby reducing the possibility of invalid measurement of the terminal device, and further helping to reduce the overhead of the terminal device.

In one possible implementation, when a first part of a PLMN of a first cell matches a corresponding part of a PLMN selected by a terminal device, the first cell satisfies a first condition for cell camping.

In a possible implementation method, the network device sends, to the terminal device, the other part of the PLMN of the first cell or the PLMN of the first cell, where the PLMN of the first cell is used by the terminal device to determine whether to continue to perform cell search after determining that the first cell satisfies a first condition for cell camping.

In one possible implementation, the PBCH includes MIB or physical layer signaling that includes the first portion of the PLMN of the first cell.

In a third aspect, the present application provides a communication apparatus, which may be a terminal device or a network device, and may also be a chip for a terminal device or a chip for a network device. The apparatus has the function of implementing the embodiments of any one of the first aspect or the second aspect described above. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a fourth aspect, the present application provides a communication apparatus comprising: a processor and a memory; the memory is configured to store computer executable instructions, which when executed by the processor, cause the apparatus to perform the method of camping on a cell as described in the first aspect or any one of the first aspects, or cause the apparatus to perform the method of camping on a cell as described in the second aspect or any one of the second aspects.

In a fifth aspect, the present application provides a communication device, comprising: comprising means or units for performing the steps of the first aspect, or the second aspect, respectively.

In a sixth aspect, the present application provides a communications device comprising a processor and an interface circuit, the processor being configured to communicate with other devices via the interface circuit and to perform any of the methods provided in the first aspect or the second aspect above. The processor includes one or more.

In a seventh aspect, the present application provides a communication device, including a processor, connected to a memory, and configured to invoke a program stored in the memory to perform a method in any implementation manner of the first aspect or the second aspect. The memory may be located within the device or external to the device. And the processor includes one or more.

In an eighth aspect, the present application provides a terminal device, configured to execute any one of the implementation methods of the first aspect or the first aspect.

In a ninth aspect, the present application provides a network device, configured to perform any one of the implementation methods of the second aspect or the second aspect.

In a tenth aspect, the present application also provides a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the processor to perform the method of the above aspects.

In an eleventh aspect, the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

In a twelfth aspect, the present application further provides a chip system, including: a processor configured to perform the method of the above aspects.

In a thirteenth aspect, the present application further provides a communication system, including: a terminal device comprising any one of the above aspects and a network device comprising any one of the above aspects.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

FIG. 1 is a schematic diagram of a possible network architecture provided herein;

fig. 2 is a schematic diagram illustrating a method for camping on a cell according to the present application;

fig. 3 is a schematic diagram of a communication device provided in the present application;

fig. 4 is a schematic diagram of another communication device provided in the present application;

fig. 5 is a schematic diagram of another communication device provided in the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. The particular methods of operation in the method embodiments may also be applied to apparatus embodiments or system embodiments. In the description of the present application, the term "plurality" means two or more unless otherwise specified.

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. The particular methods of operation in the method embodiments may also be applied to apparatus embodiments or system embodiments.

Fig. 1 is a schematic diagram of a possible network architecture to which the present application is applied, which includes a network device and at least one terminal device. The network device and the terminal device can operate on an NR communication system, wherein the terminal device can communicate with the network device via a 5GNR communication system. The network device and the terminal device may also operate on other communication systems, and the embodiments of the present application are not limited.

A terminal device, also called a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice/data connectivity to a user, for example, a handheld device with a wireless connection function, or a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like.

A network device is a device in a wireless network, such as a Radio Access Network (RAN) node that accesses a terminal device to the wireless network. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NodeB, NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In one network configuration, a network device may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node.

To support data communication, in NR, the core network needs to establish two connections for the terminal device: the connection between the terminal equipment and the network equipment, and the connection between the network equipment and the core network. So that data can be transmitted out of the cellular network via the network device and the core network.

In NR, a terminal device controlled by a Radio Resource Control (RRC) layer includes three states: connected state (connected), idle state (idle), inactive state (inactive) (or called inactive, inactive). In a connected state, the terminal equipment is kept connected with the network equipment, and the network equipment is kept connected with the core network; in an idle state, the terminal equipment is not connected with the network equipment, and the network equipment is not connected with the core network; in the inactive state, the terminal device is not connected with the network device, and the network device is connected with the core network.

In the present application, the present invention is mainly directed to an idle state or an inactive state of a terminal device, in which the terminal device may move, and thus needs to camp on a cell or update the camped cell, and a specific mechanism is cell selection or cell reselection. The cell selection means that the terminal equipment selects an available cell to reside in the cell without residing in the current cell; the cell reselection means that the terminal equipment currently has a resident cell and selects another cell with a better signal to reside.

The method for camping on a cell provided in the present application is described below with reference to fig. 1, and can be used to solve the problems in the background art. Fig. 2 is a schematic diagram illustrating a method for camping on a cell according to the present application. The method comprises the following steps:

step 201, the network device generates information carried by the PBCH. The network device corresponds to one or more cells, and the cell corresponding to the network device comprises a first cell.

The PBCH carries a first portion of a PLMN of a first cell.

Optionally, the PBCH includes a Master Information Block (MIB) that includes the first part of the PLMN of the first cell. Alternatively, the PBCH includes physical layer signaling that includes the first portion of the PLMN of the first cell.

As an implementation method, the terminal device and the network device may agree in advance: the first part of the PLMN is the low N bits of the PLMN, or pre-agreed: the first part of the PLMN is the high N bits of the PLMN, or pre-agreed: the first part of the PLMN is N bits of the middle fixed position of the PLMN, N being a positive integer. For example, the PLMN has a total of eight bits: 11100001, it is pre-agreed that the first part of the PLMN is the low 4 bits of the PLMN, and then the first part of the PLMN is 0001, and the other part of the PLMN (which may be referred to as the second part of the PLMN) is 1110.

Here, only a part of bits (e.g., N bits) of the PLMN are carried in the PBCH, considering that the PBCH has a limited load and considering that the PBCH load is not significantly increased, which will help to improve the efficiency of PBCH detection by the terminal device.

Step 202, the network device sends the information carried on the PBCH to the terminal device through the PBCH.

The network equipment sends the information carried on the PBCH to the terminal equipment in the first cell. It may also be understood that the network device broadcasts and transmits information carried on the PBCH in a first cell, which includes one or more terminal devices under the coverage of the first cell.

Step 203, the terminal device detects the PBCH of the first cell.

The terminal device detects a PBCH of a first cell and acquires a first part of a PLMN of the first cell in the PBCH. As an implementation method, an approximate process of detecting the PBCH of the first cell by the terminal device is as follows: and searching a synchronization signal so as to determine the time-frequency resource position of the PBCH, and demodulating by using a preset modulation and coding scheme on the determined time-frequency resource position to obtain a physical layer signaling part and the MIB of the PBCH.

Step 204, the terminal device determines whether the first cell meets a first condition for cell camping according to the first part of the PLMN of the first cell and the corresponding part of the PLMN selected by the terminal device.

Optionally, the PLMN selected by the terminal device includes a registered PLMN, and/or an equivalent PLMN. The Registered PLMN (Registered PLMN) may also be referred to as a Registered PLMN, and is a PLMN Registered by the terminal device before the terminal device is powered off or disconnected last time, and the parameter is stored in the memory of the terminal device, and the cell corresponding to the RPLMN is preferentially searched each time the terminal device is powered on. Here, an Equivalent PLMN (Equivalent PLMN) may also be referred to as an Equivalent PLMN, and is a PLMN that is located at the same level as the PLMN currently selected by the terminal device, and has the same priority, and the Equivalent PLMN is a PLMN allocated by the core network according to the registered PLMN.

The corresponding part of the PLMN selected by the terminal device here refers to the bits corresponding to the first part of the PLMN of the first cell. For example, the terminal device and the network device agree in advance: the first part of the PLMN is the low N bits of the PLMN, and the corresponding part of the PLMN selected by the terminal device here refers to the low N bits of the PLMN selected by the terminal device. For another example, the terminal device and the network device agree in advance: the first part of the PLMN is the high N bits of the PLMN, and the corresponding part of the PLMN selected by the terminal device here refers to the high N bits of the PLMN selected by the terminal device. For another example, the terminal device and the network device agree in advance: the first part of the PLMN is N bits of the middle fixed position of the PLMN, and the corresponding part of the PLMN selected by the terminal device here refers to N bits of the middle fixed position of the PLMN selected by the terminal device.

Optionally, when the first part of the PLMN of the first cell matches (for example, is the same as) the corresponding part of the PLMN selected by the terminal device, the terminal device determines that the first cell satisfies the first condition of cell camping. When the first portion of the PLMN of the first cell does not match (e.g., is not the same as) the corresponding portion of the PLMN selected by the terminal device, the terminal device determines that the first cell does not satisfy the first condition for cell camping. For example, the terminal device supports multiple PLMNs (for example, includes a registered PLMN and multiple equivalent PLMNs), and if the terminal device selects a PLMN from the multiple PLMNs supported, it determines that the first cell satisfies the first condition for cell camping when a corresponding portion of the selected PLMN matches the first portion of the PLMN of the first cell, and if the selected PLMN does not match the first portion of the PLMN of the first cell, it determines that the first cell does not satisfy the first condition for cell camping. For another example, the terminal device supports multiple PLMNs (for example, includes one registered PLMN and multiple equivalent PLMNs), and if the terminal device selects more than one PLMN from the multiple supported PLMNs, it determines that the first cell satisfies the first condition for cell camping when there is a corresponding portion of at least one PLMN in the selected PLMNs matching the first portion of the PLMN of the first cell, and otherwise determines that the first cell does not satisfy the first condition for cell camping if all the corresponding portions of the selected PLMNs do not match the first portion of the PLMN of the first cell.

Based on the scheme, the network device carries the first part of the PLMN to the PBCH, so that the terminal device can detect the first part of the PLMN of the first cell from the PBCH, and further can quickly determine whether the first cell meets the first condition of cell residence according to the detected first part of the PLMN of the first cell and the corresponding part of the PLMN selected by the terminal device, thereby achieving the purpose of preliminarily determining whether the first cell is a cell where the first cell can reside, and not needing to detect the SIB1 as in the prior art to preliminarily determining whether the first cell is a cell where the first cell can reside, thereby reducing the possibility of invalid measurement of the terminal device, and further helping to reduce the overhead of the terminal device.

In a possible implementation method, after step 204, when the first part of the PLMN of the first cell matches with the corresponding part of the PLMN selected by the terminal device, the terminal device obtains the other part of the PLMN of the first cell or the PLMN of the first cell; and when the PLMN selected by the terminal equipment comprises the PLMN of the first cell and the quality of the first cell meets a second condition of cell residence, the terminal equipment determines to reside in the first cell. Based on the scheme, when the first part of the PLMN of the first cell meets the first condition (i.e., the first part of the PLMN of the first cell matches the corresponding part of the PLMN selected by the terminal device), the terminal device obtains the other part of the PLMN of the first cell or the PLMN of the first cell, and when the PLMN selected by the terminal device includes the PLMN of the first cell and the quality of the first cell meets the second condition that the cell resides, the terminal device determines to reside in the first cell, thereby realizing selection of a resident cell meeting the requirement for the terminal device.

Optionally, the terminal device may determine the quality of the cell according to at least one of RSRQ, RSRP, and RSSI. Optionally, the terminal device may determine the cell quality based on one of the parameters, and set a corresponding threshold to determine whether the requirement for the cell quality for cell camping is met, for example, using RSRP as an example, the terminal device measures the cell quality, that is, RSRP, and when the RSRP is greater than or equal to the threshold, the second condition for cell camping is met. The RSRQ is similar to the RSRP, and is not described in detail. For another example, the terminal device measures the quality of the cell, that is, the RSSI, and when the RSSI is less than or equal to the threshold, the second condition for cell camping is satisfied. Optionally, the terminal device may determine the cell quality based on a plurality of parameters, for example, taking RSRP and RSSI as an example, the cell quality may be obtained based on the following weight: cell quality x RSRP + y RSSI, where 0< x <1, and 0< y < 1. Alternatively, the measurement mode of the cell quality may be configured by the network side. For another example, taking RSRQ and RSSI as examples, the quality of a cell may be obtained based on the following weights: cell quality x RSRQ + y RSSI, where 0< x <1, and 0< y < 1. At this time, when the weight of RSRP or RSRQ is important and the cell quality is greater than or equal to the threshold, the second condition for cell camping is satisfied. And when the weight of the RSSI is important and the cell quality is less than or equal to the threshold value, the second condition of cell residence is met. Alternatively, the measurement mode of the cell quality may be configured by the network side.

Optionally, the terminal device may obtain other parts of the PLMN of the first cell or the PLMN of the first cell (i.e., all of the PLMN of the first cell) from the system information. The system information is, for example, SIB1, and the SIB1 may be transmitted through a Physical Downlink Shared CHannel (PDSCH).

In a possible implementation method, after step 204, when the first part of the PLMN of the first cell does not match the corresponding part of the PLMN selected by the terminal device, the terminal device continues to perform cell search to camp on other cells. Based on the scheme, when the first part of the PLMN of the first cell is not matched with the corresponding part of the PLMN selected by the terminal device, the terminal device determines that the first cell is a non-suitable cell (i.e., the cell is not a suitable resident cell) or is excluded from suitable cells, and will not continue to perform cell measurement in the first cell, but continue to perform cell search to search for other cells meeting the conditions for residence, so that the measurement overhead of the first cell is reduced, and the overhead of the terminal device can be reduced.

In a possible implementation method, in the present application, the terminal device performs cell search according to the priority of the frequency point. The different frequency points are set with priorities in advance, and then the terminal equipment searches the cells corresponding to the frequency points in sequence according to the sequence from high to low of the priorities until a proper cell is searched for residence. For example, for the first cell: if the first part of the PLMN acquired by the terminal device matches the corresponding part of the selected PLMN, and the first cell is a suitable cell, determining whether the suitable cell can be used as a camped cell, and if the PLMN selected by the terminal device includes the PLMN of the first cell and the quality of the first cell meets the second condition of cell camping, the first cell can be used as a camped cell. Based on this scheme, in step 201, the terminal device may determine, according to the priority of the frequency point, that the PBCH is currently detected in the first cell corresponding to the first frequency point.

In a specific implementation, the network device may further send, to the terminal device, a Synchronization Signal (including a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS)) in the first cell, where the Synchronization Signal is sent before the network device sends the PBCH, or after the network device sends the PBCH, or simultaneously with sending the PBCH, and the present application is not limited thereto. In the cell search process, the terminal device reads the synchronization signal at the time-frequency resource position where the possible synchronization signal appears, so that a Physical Cell Identifier (PCI) can be obtained from the synchronization signal. Further, the terminal device may also measure the synchronization signal to obtain a cell quality, such as RSRP or RSRQ as described above. In addition, the cell quality may also be obtained by measuring a reference signal, for example, a channel state information-reference signal (CSI-RS).

Based on the scheme of the application, the first part of the PLMN of the first cell is sent through the PBCH, so that the terminal device can acquire the first part of the PLMN more quickly, and when the first part of the PLMN is not matched with the corresponding part of the PLMN selected by the terminal, it is indicated that the first cell does not satisfy the camping condition, so that the terminal device will not need to continue to acquire other parts of the first PLMN, and will also stop measuring the first cell (e.g., measuring the quality of the synchronization signal or the reference signal), thereby reducing unnecessary overhead of the terminal device, and saving power consumption of the terminal device.

It is to be understood that, in order to implement the above functions, the above network elements include corresponding hardware structures and/or software modules for executing the functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

As shown in fig. 3, which is a possible exemplary block diagram of a communication device according to the present application, the communication device 300 may be in the form of software or hardware. The communication device 300 may include: a processing unit 302 and a communication unit 303. As an implementation, the communication unit 303 may include a receiving unit and a transmitting unit. The processing unit 302 is used for controlling and managing the operation of the communication apparatus 300. The communication unit 303 is used to support communication of the communication device 300 with other network entities. The communication device 300 may further comprise a memory unit 301 for storing program codes and data of the communication device 300.

The processing unit 302 may be a processor or a controller, and may be, for example, a general-purpose Central Processing Unit (CPU), a general-purpose processor, a Digital Signal Processing (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 storage unit 301 may be a memory. The communication unit 303 is an interface circuit of the apparatus for receiving signals from other apparatuses. For example, when the device is implemented in the form of a chip, the communication unit 303 is an interface circuit for the chip to receive a signal from another chip or device, or an interface circuit for the chip to transmit a signal to another chip or device.

The communication device 300 may be a terminal device in any of the above embodiments, and may also be a chip for a terminal device. For example, when the communication apparatus 300 is a terminal device, the processing unit 302 may be a processor, and the communication unit 303 may be a transceiver, for example. Optionally, the transceiver may comprise radio frequency circuitry and the storage unit may be, for example, a memory. For example, when the communication apparatus 300 is a chip for a terminal device, the processing unit 302 may be a processor, for example, and the communication unit 303 may be an input/output interface, a pin, a circuit, or the like, for example. The processing unit 302 can execute computer executable instructions stored in a storage unit, optionally, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the terminal device, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.

A communication unit 303, configured to detect a PBCH of a first cell, the PBCH carrying a first portion of a Public Land Mobile Network (PLMN) of the first cell; a processing unit 302, configured to determine whether the first cell meets a first condition for cell camping according to a first portion of a PLMN of the first cell and a corresponding portion of the PLMN selected by the terminal device.

In a possible implementation method, the processing unit 302 is further configured to: when the first part of the PLMN of the first cell is matched with the corresponding part of the PLMN selected by the terminal equipment, acquiring other parts of the PLMN of the first cell or the PLMN of the first cell; and when the PLMN selected by the terminal equipment comprises the PLMN of the first cell and the quality of the first cell meets a second condition of cell residence, determining to reside in the first cell.

In a possible implementation method, the processing unit 302 is further configured to determine the quality of the cell according to at least one of RSRQ, RSRP, and RSSI.

In a possible implementation method, the processing unit 302 is specifically configured to obtain, from system information, other parts of the PLMN of the first cell or the PLMN of the first cell.

In a possible implementation method, the processing unit 302 is further configured to continue to perform cell search to camp on other cells when the first portion of the PLMN of the first cell does not match the corresponding portion of the PLMN selected by the terminal device.

In a possible implementation method, the first part of the PLMN of the first cell is N lower bits than the PLMN of the first cell, and N is a positive integer.

In one possible implementation, the PBCH includes MIB or physical layer signaling, the MIB or physical layer signaling including a first portion of a PLMN of the first cell.

In a possible implementation method, the processing unit 302 is further configured to determine, before the communication unit 303 detects the PBCH of the first cell, to detect the PBCH of the first cell at the first frequency point according to the frequency point priority.

It can be understood that, for a specific implementation procedure and corresponding beneficial effects of the communication apparatus when used in the method for camping on a cell, reference may be made to the related description in the foregoing method embodiment, and details are not described here.

As shown in fig. 4, which is a possible exemplary block diagram of a communication device according to the present application, the communication device 400 may be in the form of software or hardware. The communication apparatus 400 may include: a processing unit 402 and a communication unit 403. As an implementation, the communication unit 403 may include a receiving unit and a transmitting unit. The processing unit 402 is configured to control and manage operations of the communication apparatus 400. The communication unit 403 is used to support communication of the communication apparatus 400 with other network entities. The communication apparatus 400 may further comprise a storage unit 401 for storing program codes and data of the communication apparatus 400.

The processing unit 402 may be a processor or a controller, and may be, for example, a general purpose CPU, a general purpose processor, a DSP, an ASIC, an 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 storage unit 401 may be a memory. The communication unit 403 is an interface circuit of the apparatus for receiving signals from other apparatuses. For example, when the device is implemented in the form of a chip, the communication unit 403 is an interface circuit for the chip to receive signals from other chips or devices, or an interface circuit for the chip to transmit signals to other chips or devices.

The communication apparatus 400 may be a network device in any of the above embodiments, and may also be a chip for a network device. For example, when the communication apparatus 400 is a network device, the processing unit 402 may be a processor, and the communication unit 403 may be a transceiver, for example. Optionally, the transceiver may comprise radio frequency circuitry and the storage unit may be, for example, a memory. For example, when the communication apparatus 400 is a chip for a network device, the processing unit 402 may be a processor, for example, and the communication unit 403 may be an input/output interface, a pin, a circuit, or the like, for example. The processing unit 402 can execute computer-executable instructions stored in a storage unit, which may alternatively be a storage unit in the chip, such as a register, a cache, etc., or a storage unit located outside the chip in the network device, such as a ROM or other types of static storage devices that can store static information and instructions, a RAM, etc.

A processing unit 402, configured to generate information carried by a PBCH, where the information carried by the PBCH includes a first part of a PLMN of the first cell, and the first part of the PLMN of the first cell is used by a terminal device to determine whether the first cell meets a first condition for cell camping; a communication unit 403, configured to send information carried by the PBCH to a terminal device through the PBCH.

In a possible implementation method, when the first part of the PLMN of the first cell matches the corresponding part of the PLMN selected by the terminal device, the first cell satisfies a first condition for cell camping.

In a possible implementation method, the communication unit 403 is further configured to send, to the terminal device, the other part of the PLMN of the first cell or the PLMN of the first cell, where the PLMN of the first cell is used by the terminal device to determine whether to continue to perform cell search after determining that the first cell meets the first condition of cell camping.

Referring to fig. 5, a schematic diagram of a communication apparatus provided in the present application is shown, where the communication apparatus may be the terminal device or the network device. The communication device 500 includes: a processor 502, a communication interface 503, and a memory 501. Optionally, the communication device 500 may also include a communication line 504. Wherein, the communication interface 503, the processor 502 and the memory 501 may be connected to each other through a communication line 504; the communication line 504 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication lines 504 may be divided into address buses, data buses, control buses, and the like. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.

Processor 502 may be a CPU, microprocessor, ASIC, or one or more integrated circuits configured to control the execution of programs in accordance with the teachings of the present application.

The communication interface 503 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), a wired access network, and the like.

The memory 501 may be, but is not limited to, a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a CD-ROM or other optical disk storage, an optical disk storage (including a compact disk, a laser disk, an optical disk, a digital versatile disk, a blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be separate and coupled to the processor via a communication line 504. The memory may also be integral to the processor.

The memory 501 is used for storing computer-executable instructions for executing the present application, and is controlled by the processor 502 to execute. The processor 502 is configured to execute computer-executable instructions stored in the memory 501, so as to implement the method for camping on a cell provided by the above-mentioned embodiments of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

Those of ordinary skill in the art will understand that: the various numbers of the first, second, etc. mentioned in this application are only used for the convenience of description and are not used to limit the scope of the embodiments of this application, but also to indicate the sequence. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one" means one or more. At least two means two or more. "at least one," "any," or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one (one ) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple. "plurality" means two or more, and other terms are analogous. Furthermore, for elements (elements) that appear in the singular form "a," an, "and" the, "they are not intended to mean" one or only one "unless the context clearly dictates otherwise, but rather" one or more than one. For example, "a device" means for one or more such devices.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The various illustrative logical units and circuits described in this application may be implemented or operated upon by design of a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

The steps of a method or algorithm described in the embodiments herein may be embodied directly in hardware, in a software element executed by a processor, or in a combination of the two. The software cells may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. For example, a storage medium may be coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC, which may be disposed in a terminal device. In the alternative, the processor and the storage medium may reside as discrete components in a terminal device.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include such modifications and variations.

Claims

1. A method for camping on a cell, comprising:

the method comprises the steps that terminal equipment detects a Physical Broadcast Channel (PBCH) of a first cell, wherein the PBCH carries a first part of a Public Land Mobile Network (PLMN) of the first cell;

and the terminal equipment determines whether the first cell meets a first condition of cell residence according to the first part of the PLMN of the first cell and the corresponding part of the PLMN selected by the terminal equipment.

2. The method of claim 1, further comprising:

when the first part of the PLMN of the first cell is matched with the corresponding part of the PLMN selected by the terminal equipment, the terminal equipment acquires other parts of the PLMN of the first cell or the PLMN of the first cell;

and when the PLMN selected by the terminal equipment comprises the PLMN of the first cell and the quality of the first cell meets a second condition of cell residence, the terminal equipment determines to reside in the first cell.

3. The method of claim 2, further comprising:

and the terminal equipment determines the quality of the cell according to at least one of Reference Signal Received Quality (RSRQ), Reference Signal Received Power (RSRP) and Received Signal Strength Indicator (RSSI).

4. The method of claim 2 or 3, wherein the terminal device obtaining the other part of the PLMN of the first cell or the PLMN of the first cell comprises:

and the terminal equipment acquires other parts of the PLMN of the first cell or the PLMN of the first cell from system information.

5. The method of claim 1, further comprising:

when the first portion of the PLMN of the first cell does not match the corresponding portion of the PLMN selected by the terminal device, the terminal device continues to perform cell search to camp on other cells.

6. The method of any of claims 1 to 5, wherein the first portion of the PLMN of the first cell is N lower bits of the PLMN of the first cell, N being a positive integer.

7. The method of any of claims 1 to 6, wherein the PBCH comprises MIB or physical layer signaling, the MIB or physical layer signaling comprising a first portion of a PLMN of the first cell.

8. A method according to any of claims 1 to 7, wherein the PLMN selected by the terminal device comprises a registered PLMN, and/or an equivalent PLMN.

9. The method of any of claims 1 to 8, wherein before the terminal device detects the PBCH of the first cell, further comprising:

and the terminal equipment determines to detect the PBCH of the first cell at the first frequency point according to the frequency point priority.

10. A method for camping on a cell, comprising:

the network equipment generates information carried by a Physical Broadcast Channel (PBCH), wherein the information carried by the PBCH comprises a first part of a Public Land Mobile Network (PLMN) of the first cell, and the first part of the PLMN of the first cell is used for the terminal equipment to determine whether the first cell meets a first condition of cell residence;

and the network equipment sends the information carried by the PBCH to terminal equipment through the PBCH.

11. The method of claim 10, wherein the first cell satisfies a first condition for cell camping when the first portion of the PLMN of the first cell matches a corresponding portion of the PLMN selected by the terminal device.

12. The method of claim 10 or 11, further comprising:

and the network equipment sends other parts of the PLMN of the first cell or the PLMN of the first cell to the terminal equipment, wherein the PLMN of the first cell is used for the terminal equipment to determine whether to continue to execute cell search after determining that the first cell meets a first condition of cell residence.

13. The method of any of claims 10 to 12, wherein the first portion of the PLMN of the first cell is N lower bits than the PLMN of the first cell, and N is a positive integer.

14. The method of any of claims 10 to 13, wherein the PBCH comprises a master information block, MIB, or physical layer signaling comprising a first part of a PLMN of the first cell.

15. A method according to any of claims 10 to 14, wherein the PLMN selected by the terminal device comprises a registered PLMN, and/or an equivalent PLMN.

16. A communications apparatus, comprising:

a communication unit, configured to detect a physical broadcast channel PBCH of a first cell, where the PBCH carries a first part of a public land mobile network PLMN of the first cell;

and the processing unit is used for determining whether the first cell meets a first condition of cell residence according to the first part of the PLMN of the first cell and the corresponding part of the PLMN selected by the terminal equipment.

17. The apparatus as recited in claim 16, said processing unit to further:

when the first part of the PLMN of the first cell is matched with the corresponding part of the PLMN selected by the terminal equipment, acquiring other parts of the PLMN of the first cell or the PLMN of the first cell;

and when the PLMN selected by the terminal equipment comprises the PLMN of the first cell and the quality of the first cell meets a second condition of cell residence, determining to reside in the first cell.

18. The apparatus as recited in claim 17, said processing unit to further:

and determining the quality of the cell according to at least one of Reference Signal Received Quality (RSRQ), Reference Signal Received Power (RSRP) and Received Signal Strength Indicator (RSSI).

19. The apparatus according to claim 17 or 18, wherein the processing unit is specifically configured to:

obtaining other portions of the PLMN of the first cell or the PLMN of the first cell from system information.

20. The apparatus as recited in claim 16, said processing unit to further:

and when the first part of the PLMN of the first cell is not matched with the corresponding part of the PLMN selected by the terminal equipment, continuing to perform cell search to reside in other cells.

21. The apparatus of any of claims 16 to 20, wherein the first portion of the PLMN of the first cell is N lower bits than the PLMN of the first cell, and N is a positive integer.

22. The apparatus of any one of claims 16 to 21, wherein the PBCH comprises a master information block, MIB, or physical layer signaling comprising a first portion of a PLMN of the first cell.

23. An arrangement according to any of claims 16 to 22, wherein the PLMN selected by the terminal device comprises a registered PLMN, and/or an equivalent PLMN.

24. The apparatus of any of claims 16 to 23, wherein the processing unit is further configured to:

before the communication unit detects the PBCH of the first cell, the PBCH of the first cell is determined to be detected at the first frequency point according to the priority of the frequency points.

25. A communication device comprising means for performing the steps of the method of any one of claims 10 to 15.

26. A communications apparatus, comprising: a processor and interface circuitry, the processor to communicate with a network device through the interface circuitry and to perform the method of any of claims 1 to 9.

27. A communications apparatus, comprising: a processor and interface circuitry, the processor being configured to communicate with a terminal device via the interface circuitry and to perform the method of any of claims 10 to 15.

28. A communications device comprising a processor for invoking a program stored in a memory to perform the method of any one of claims 1 to 9.

29. A communications device comprising a processor for invoking a program stored in memory to perform the method of any one of claims 10 to 15.

30. A storage medium having stored thereon a computer program or instructions, which when executed cause a processor to perform the method of any of claims 1 to 9 or to perform the method of any of claims 10 to 15.