CN109327868B

CN109327868B - Cell measurement method and device, and cell switching method and device

Info

Publication number: CN109327868B
Application number: CN201710640300.XA
Authority: CN
Inventors: 张英杰; 钱辰; 喻斌
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2017-07-31
Filing date: 2017-07-31
Publication date: 2023-10-10
Anticipated expiration: 2037-07-31
Also published as: CN109327868A

Abstract

The invention relates to the technical field of wireless communication, and provides a cell measurement method and device, a cell switching method and device, which are applied to a cell measurement method of a terminal and comprise the following steps: measuring at least one of pilot frequency CSI-RS resources and a synchronous signal block according to the initial measurement configuration information and the terminal dedicated channel state information, and measuring adjacent cells in a cell list and a cell to which the terminal belongs respectively to obtain a measurement result; and sending the measurement result to the base station so that the base station determines whether to switch the cell to which the terminal currently belongs according to the measurement result. The invention improves the efficiency and performance of the cell measurement and switching process.

Description

Cell measurement method and device, and cell switching method and device

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a cell measurement method and apparatus, and a cell handover method and apparatus.

Background

With the rapid development of the information industry, especially the growing demand from the mobile internet and internet of things (IoT, internet of things), the future mobile communication technology is challenged unprecedented. As per the international telecommunications union ITU report ITU-R M [ imt. Beyond2020.Traffic ], it is expected that in 2020, mobile traffic will increase approximately 1000 times as compared to 2010 (4G age), the number of user equipment connections will also exceed 170 billions, and the number of connected devices will be even more dramatic as the vast number of IoT devices gradually penetrate into the mobile communication network. To address this unprecedented challenge, the communications industry and academia have developed a wide range of fifth generation mobile communication technology research (5G), oriented in the 2020 s.

The framework and overall goals of future 5G have been discussed in ITU report ITU-R M [ imt.vision ], where the requirements expectations, application scenarios and important performance metrics of 5G are specified. For new requirements in 5G, ITU report ITU-R M [ imt.future TECHNOLOGY TRENDS ] provides information about technical trends for 5G, the method aims to solve the remarkable problems of remarkably improving the throughput of the system, consistent user experience, expandability to support the IoT, time delay, energy efficiency, cost, network flexibility, support of emerging services, flexible spectrum utilization and the like.

Cell measurement and handover are important steps in wireless communication systems. When a terminal using a network service moves from one cell to another cell, or due to radio transmission traffic load adjustment, active operation maintenance, equipment failure, etc., the system transfers the communication link between the terminal and the original cell to the new cell in order to ensure the continuity of communication and the quality of service. This process is called handover. In order to complete the handover procedure, the terminal needs to measure the original cell and the new cell and report the measurement result, and the system performs the final handover based on the measurement result. As shown in fig. 1, the measurement and handover procedure of a cell in the conventional LTE/LTE-a wireless communication system is shown. In the measuring and switching process, the method comprises the following steps:

Step 1: the base station informs the terminal of measurement configuration information through a measConfig cell carried by an RRC (Radio Resource Control ) Connection Reconfiguration message, including an object to be measured by the terminal, a neighbor cell list, a reporting mode, a measurement identifier, an event parameter, and the like.

Step 2: the terminal performs measurement configuration at the RRC protocol end of the terminal according to the measurement control issued by the base station, and sends RRC Connection Reconfiguration Complete information to the base station to confirm that the measurement configuration is completed.

Step 3: the terminal measures the Cell based on the measurement configuration information received in the step 1 and a common Cell-specific reference signal (Cell-specific reference signals) of the serving Cell, and optionally measures the neighbor Cell based on the measurement configuration information received in the step 1 and the Cell-specific reference signal of the neighbor Cell, and reports the measurement result to the base station.

Step (a) 4: the base station makes a decision for terminal handover based on the measurement report and the radio resource management information received in step 3.

Step 5: if the decision in the step 4 is the handover, the base station determines a suitable target cell and executes the final handover.

In existing cell measurement and handover methods, the measurements of the current serving cell and neighbor cells are based on cell-specific reference signals, which are common to all terminals of the same cell. In future 5G wireless communication systems, cell-specific reference signals common to such terminals will no longer be supported.

Therefore, the measurement and switching method based on the cell-specific reference signal adopted in the LTE/LTE-a system cannot meet the requirements of the future 5G wireless communication system, and a new measurement and switching method needs to be designed for the 5G wireless communication system to replace the role of the cell wireless reference signal in the LTE/LTE-a system.

Disclosure of Invention

The object of the present invention is to solve at least one of the above technical drawbacks, in particular the problem of being unable to adapt to the requirements of future 5G wireless communication systems.

The invention provides a cell measurement method, which is applied to a terminal and comprises the following steps:

measuring at least one of pilot frequency CSI-RS resources and a synchronous signal block according to the initial measurement configuration information and the terminal dedicated channel state information, and measuring adjacent cells in a cell list and a cell to which the terminal belongs respectively to obtain a measurement result;

and sending the measurement result to the base station so that the base station determines whether to switch the cell to which the terminal currently belongs according to the measurement result.

Preferably, the terminal-specific CSI-RS resource includes a common terminal-specific CSI-RS resource, and the measuring, according to the initial measurement configuration information and the terminal-specific CSI-RS resource, the cell to which the terminal belongs and the neighbor cell in the cell list respectively, to obtain a measurement result includes:

And respectively measuring the cell to which the terminal belongs and the neighbor cells in the cell list according to the initial measurement configuration information and the public terminal special CSI-RS resource to obtain a measurement result.

Preferably, the terminal-specific CSI-RS resource includes a specific terminal-specific CSI-RS resource, and the measuring, according to the initial measurement configuration information and the terminal-specific CSI-RS resource, the cell to which the terminal belongs and the neighbor cell in the cell list respectively, to obtain a measurement result includes:

and measuring the cell to which the terminal belongs and the neighbor cells in the cell list respectively according to the initial measurement configuration information and the special CSI-RS resource of the special terminal to obtain a measurement result.

Preferably, the terminal-specific CSI-RS resource further includes a preconfigured terminal-specific CSI-RS resource, and the measuring the cell to which the terminal belongs according to the initial measurement configuration information and the terminal-specific CSI-RS resource to obtain a measurement result, and further includes:

and measuring the cell to which the terminal belongs according to the initial measurement configuration information and the pre-configured terminal-specific CSI-RS resource to obtain a measurement result.

Preferably, the method further comprises:

receiving the initial measurement configuration information sent by the base station;

Performing initial measurement configuration according to the initial measurement configuration information, and returning an initial measurement configuration completion message to the base station;

and receiving the terminal-specific CSI-RS resource sent by the base station.

Preferably, the method further comprises:

receiving initial measurement configuration information and a terminal-specific CSI-RS resource sent by a base station;

and carrying out initial measurement configuration according to the initial measurement configuration information, and returning an initial measurement configuration completion message to the base station.

Preferably, the configuration mode of the CSI-RS resource dedicated for the common terminal includes any one of the following:

the public terminal special CSI-RS resources are discrete in the frequency domain and the time domain, and different time resources correspond to the same frequency resource;

the public terminal special CSI-RS resources are discrete in the frequency domain and the time domain, and different time resources correspond to different frequency resources;

the public terminal dedicated CSI-RS resources are discrete in the time domain and continuous in the frequency domain, and different time resources correspond to the same frequency resource;

the public terminal dedicated CSI-RS resources are discrete in the time domain and continuous in the frequency domain, and different time resources correspond to different frequency resources;

the CSI-RS resources special for the public terminal are continuous in time domain and discrete in frequency domain, and different time resources correspond to the same frequency resources;

The CSI-RS resources special for the public terminal are continuous in time domain and discrete in frequency domain, and different time resources correspond to different frequency resources;

the common terminal-specific CSI-RS resources are contiguous in both the frequency and time domains, and the different time resources correspond to the same frequency resource;

the common terminal-specific CSI-RS resources are continuous in both the frequency domain and the time domain, and different time resources correspond to different frequency resources.

Preferably, the terminal-specific CSI-RS resources include pre-configured terminal-specific CSI-RS resources, the measuring pilot frequency CSI-RS resource and the synchronous signal block according to the initial measurement configuration information and the terminal special channel state information respectively measure the cell to which the terminal belongs and the neighbor cells in the cell list to obtain a measurement result, and the method comprises the following steps:

measuring a cell to which the terminal belongs according to the initial measurement configuration information and pre-configuring a terminal-specific CSI-RS resource to obtain a measurement result;

and respectively measuring each adjacent cell in the cell list according to the initial measurement configuration information and the synchronous signal blocks of each adjacent cell to obtain a measurement result.

Preferably, the measuring the cell to which the terminal belongs and the neighbor cells in the cell list according to the initial measurement configuration information and the synchronization signal block to obtain a measurement result includes:

Measuring the cell of the terminal according to the initial measurement configuration information and the synchronous signal block of the cell of the terminal to obtain a measurement result;

Preferably, the configuration mode of the CSI-RS resource dedicated for the terminal includes any one of the following:

the terminal-specific CSI-RS resources and the public terminal-specific CSI-RS resources are discrete in the time domain and the frequency domain and are distinguished in a time division multiplexing mode;

the terminal-specific CSI-RS resources and the public terminal-specific CSI-RS resources are discrete in the time domain and the frequency domain and are distinguished in a frequency division multiplexing mode;

the terminal-specific CSI-RS resources and the public terminal-specific CSI-RS resources are discrete in the time domain and the frequency domain and are distinguished in a frequency division multiplexing mode and a time division multiplexing mode;

the terminal-specific CSI-RS resources and the public terminal-specific CSI-RS resources are discrete in the time domain and continuous in the frequency domain, and are distinguished in a time division multiplexing mode;

the terminal-specific CSI-RS resources and the public terminal-specific CSI-RS resources are discrete in the time domain and continuous in the frequency domain, and are distinguished in a frequency division multiplexing mode;

The terminal-specific CSI-RS resources and the public terminal-specific CSI-RS resources are discrete in the time domain and continuous in the frequency domain, and are distinguished in a frequency division multiplexing mode and a time division multiplexing mode;

the terminal-specific CSI-RS resources and the public terminal-specific CSI-RS resources are continuous in the time domain and discrete in the frequency domain, and are distinguished in a time division multiplexing mode;

the terminal-specific CSI-RS resources and the public terminal-specific CSI-RS resources are continuous in the time domain and discrete in the frequency domain, and are distinguished in a frequency division multiplexing mode;

the terminal-specific CSI-RS resources and the public terminal-specific CSI-RS resources are continuous in the time domain and discrete in the frequency domain, and are distinguished in a frequency division multiplexing mode and a time division multiplexing mode;

the terminal-dedicated CSI-RS resources and the public terminal-dedicated CSI-RS resources are continuous in both time domain and frequency domain and are distinguished in a time division multiplexing mode;

the terminal-dedicated CSI-RS resources and the public terminal-dedicated CSI-RS resources are continuous in both time domain and frequency domain and are distinguished in a frequency division multiplexing mode;

the terminal-specific CSI-RS resource is continuous with the common terminal-specific CSI-RS resource in both the time domain and the frequency domain, and simultaneously, the frequency division multiplexing and the time division multiplexing are used for distinguishing.

Preferably, the method comprises the steps of, the method further comprises the steps of:

Receiving any one of the following information to determine the number of the terminal-specific CSI-RS resources as one;

time domain index and frequency domain index of special time-frequency resource;

sequencing the obtained PRB or RE corresponding indexes according to a time index priority or frequency index priority mode;

the time sequence is preset, and the physical resource block index or resource element or bit map information of the frequency resource is configured.

Preferably, the method further comprises:

receiving any one of the following information to determine that the number of the terminal-dedicated CSI-RS resources is at least two;

the number of time-frequency resources in the time-frequency resource group for measurement and configuration information of each time-frequency resource for measurement;

a preconfigured time domain index and/or frequency domain index.

The invention also provides a cell switching method which is applied to the base station and comprises the following steps:

transmitting initial measurement configuration information to a terminal and terminal measuring pilot channel state information (CSI-RS) resources by using dedicated channel state information;

receiving a measurement result returned by the terminal;

determining whether to switch the cell to which the terminal belongs currently according to the measurement result;

if the terminal is switched, a cell switching instruction carrying a target neighbor cell is sent, so that the terminal is switched to the target neighbor cell from the cell to which the terminal belongs according to the cell switching instruction.

The invention also provides a cell measurement device, which comprises:

the processing unit is used for measuring the adjacent cells in the cell list and the cell to which the terminal belongs according to at least one of the initial measurement configuration information, the terminal dedicated channel state information measurement pilot frequency CSI-RS resource and the synchronous signal block to obtain a measurement result;

and the sending unit is used for sending the measurement result to the base station.

The invention also provides a cell switching device, which comprises:

a transmitting unit, configured to transmit initial measurement configuration information and terminal dedicated channel state information measurement pilot CSI-RS resources to a terminal;

the receiving unit is used for receiving the measurement result returned by the terminal;

the processing unit is used for determining whether to switch the cell to which the terminal belongs currently according to the measurement result; and when the switching is determined, transmitting a cell switching instruction carrying the target neighbor cell.

The invention improves the efficiency and performance of the cell measurement and switching process.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a flow chart of a method for cell measurement and handover in the prior art;

fig. 2 is a flowchart of a cell measurement method provided by the present invention;

fig. 3 is a flowchart of a cell handover method according to the present invention;

fig. 4 is a flowchart of a cell measurement and handover method provided by the present invention;

fig. 5 is a diagram illustrating a configuration example of a first dedicated CSI-RS resource for a dedicated terminal according to the present invention;

fig. 6 is a diagram illustrating a configuration example of a second dedicated CSI-RS resource for a dedicated terminal according to the present invention;

fig. 7 is a diagram illustrating a configuration example of a third dedicated CSI-RS resource for a dedicated terminal according to the present invention;

fig. 8 is a diagram illustrating a configuration example of a fourth dedicated CSI-RS resource for a dedicated terminal according to the present invention;

fig. 9 is a diagram illustrating a configuration example of a fifth dedicated CSI-RS resource for a dedicated terminal according to the present invention;

fig. 10 is a diagram illustrating a configuration example of a sixth dedicated CSI-RS resource for a dedicated terminal according to the present invention;

fig. 11 is a diagram illustrating a configuration example of a seventh dedicated CSI-RS resource for a dedicated terminal according to the present invention;

fig. 12 is a diagram illustrating a configuration example of an eighth dedicated CSI-RS resource for a dedicated terminal according to the present invention;

Fig. 13 is a diagram illustrating a configuration example of a ninth dedicated terminal dedicated CSI-RS resource provided in the present invention;

fig. 14 is a diagram illustrating a configuration example of a tenth dedicated terminal dedicated CSI-RS resource provided in the present invention;

fig. 15 is a diagram illustrating a configuration example of an eleventh dedicated CSI-RS resource for a dedicated terminal according to the present invention;

fig. 16 is a diagram illustrating a configuration example of a twelfth dedicated terminal dedicated CSI-RS resource provided in the present invention;

fig. 17 is a diagram illustrating a configuration of a first CSI-RS resource dedicated for a common terminal according to the present invention;

fig. 18 is a diagram illustrating a configuration of a second common terminal dedicated CSI-RS resource according to the present invention;

fig. 19 is a diagram illustrating a configuration example of a third common terminal dedicated CSI-RS resource provided in the present invention;

fig. 20 is a diagram illustrating a configuration example of a fourth common terminal dedicated CSI-RS resource provided in the present invention;

fig. 21 is a diagram illustrating a configuration example of a fifth CSI-RS resource dedicated for a common terminal according to the present invention;

fig. 22 is a diagram illustrating a configuration example of a sixth common terminal dedicated CSI-RS resource provided in the present invention;

fig. 23 is a diagram illustrating a configuration example of a seventh CSI-RS resource dedicated for a common terminal according to the present invention;

fig. 24 is a diagram illustrating a configuration of an eighth CSI-RS resource dedicated for a common terminal according to the present invention;

Fig. 25 is a schematic diagram of a configuration manner of uniformly and alternately configuring terminal-specific CSI-RS resources for measurement in a frequency domain according to the present invention;

fig. 26 is a schematic diagram of a configuration manner of uniformly and alternately configuring terminal-specific CSI-RS resources for measurement in the time domain provided by the present invention;

FIG. 27 shows a time domain and frequency domain uniformly spaced arrangement according to the present invention schematic diagram of configuration mode of terminal-specific CSI-RS resource for measurement;

fig. 28 is a block diagram of a cell measurement apparatus provided by the present invention;

fig. 29 is a block diagram of a cell switching device according to the present invention;

fig. 30 is a schematic diagram of an example mobile communication network according to an embodiment of the present invention.

Explanation of the drawings: the graphical meanings in the above figures 5-27 are the same as those shown in the right hand illustration of figure 5.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.

It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, a "terminal" or "terminal device" includes both a device of a wireless signal receiver having no transmitting capability and a device of receiving and transmitting hardware having receiving and transmitting hardware capable of bi-directional communication over a bi-directional communication link, as will be appreciated by those skilled in the art. Such a device may include: a cellular or other communication device having a single-line display or a multi-line display or a cellular or other communication device without a multi-line display; a PCS (PerSonal CommunicationS Service, personal communication system) that may combine voice, data processing, facsimile and/or data communication capabilities; a PDA (PerSonal Digital ASSiStant ) that can include a radio frequency receiver, pager, internet/intranet access, web browser, notepad, calendar and/or GPS (Global PoSitioning SyStem ) receiver; a conventional laptop and/or palmtop computer or other appliance that has and/or includes a radio frequency receiver. As used herein, "terminal," "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or adapted and/or configured to operate locally and/or in a distributed fashion, to operate at any other location(s) on earth and/or in space. The "terminal" and "terminal device" used herein may also be a communication terminal, a network access terminal, and a music/video playing terminal, for example, may be a PDA, a MID (Mobile Internet Device ), and/or a mobile phone with a music/video playing function, and may also be a smart tv, a set top box, and other devices.

Aiming at a 5G wireless communication system, the invention provides a novel cell measurement and switching method. In the method, after sending measurement configuration information, a base station sends a terminal-specific CSI-RS resource (UE-specific Channel State Information-Reference Signals) for measurement by a neighbor cell (optional for a current serving cell), and the terminal performs measurement of the current serving cell and the neighbor cell according to the newly configured terminal-specific CSI-RS resource (and the optional terminal-specific CSI-RS resource configured by the current serving cell). In addition, the terminal can also measure the neighbor cells based on the synchronous signal blocks of the neighbor cells. And finally, the terminal reports the measurement result to the base station, and the base station makes corresponding judgment based on the measurement result and the radio resource management information, determines a switching cell and performs a subsequent switching indication process.

In the following description of the embodiments of the present invention, the cell measurement method and device, and the switching method and device are introduced one by one.

The invention provides a cell measurement method, which is applied to a terminal, as shown in fig. 2, and comprises the following steps:

step 201, measuring at least one of the pilot frequency CSI-RS resource and the synchronous signal block according to the initial measurement configuration information and the terminal special channel state information, and measuring the cell to which the terminal belongs and the neighbor cell in the cell list respectively to obtain a measurement result.

The measurement in this step is divided into several cases, specifically:

in the first case, the terminal-specific CSI-RS resource includes a common terminal-specific CSI-RS resource, and the measuring, according to the initial measurement configuration information and the terminal-specific CSI-RS resource, the cell to which the terminal belongs and the neighbor cell in the cell list respectively, to obtain a measurement result, includes:

In a second case, the terminal-specific CSI-RS resource includes a specific terminal-specific CSI-RS resource, and the measuring the cell to which the terminal belongs according to the initial measurement configuration information and the terminal-specific CSI-RS resource to obtain a measurement result includes:

In a third case, the terminal-specific CSI-RS resources include a common terminal-specific CSI-RS resource and a preconfigured terminal-specific CSI-RS resource, and the measuring is performed on a cell to which the terminal belongs according to the initial measurement configuration information and the terminal-specific CSI-RS resource to obtain a measurement result, and the method further includes:

and measuring neighbor cells in a cell list according to the initial measurement configuration information and the public terminal special CSI-RS resource to obtain a measurement result.

In a fourth case, the terminal-specific CSI-RS resources include a specific terminal-specific CSI-RS resource and a preconfigured terminal-specific CSI-RS resource, and the measuring is performed on a cell to which the terminal belongs according to the initial measurement configuration information and the terminal-specific CSI-RS resource to obtain a measurement result, and further includes:

and measuring neighbor cells in a cell list according to the initial measurement configuration information and the special CSI-RS resource of the special terminal to obtain a measurement result.

On the basis, the processing of the terminal further comprises:

and receiving the terminal-specific CSI-RS resource sent by the base station.

Or alternatively, the first and second heat exchangers may be,

The configuration mode of the public terminal special CSI-RS resource comprises any one of the following steps:

the common terminal dedicated CSI-RS resources are continuous in the frequency domain and the time domain, and different time resources correspond to the same frequency resource;

In a fifth aspect, the terminal-specific CSI-RS resource includes a pre-configured terminal-specific CSI-RS resource, and the measuring the pilot CSI-RS resource and the synchronization signal block according to the initial measurement configuration information and the terminal-specific channel state information measures the cell to which the terminal belongs and the neighbor cells in the cell list to obtain a measurement result, and includes:

In a sixth case, the measuring the cell to which the terminal belongs and the neighbor cells in the cell list according to the initial measurement configuration information and the synchronization signal block to obtain a measurement result includes:

Aiming at the situation related to the special CSI-RS resource of the special terminal, the configuration mode of the special CSI-RS resource of the special terminal comprises any one of the following steps:

the special CSI-RS resources of the special terminal and the public terminal are discrete in time domain and frequency domain and are distinguished in a time division multiplexing mode;

the special CSI-RS resources of the special terminal and the public terminal are discrete in the time domain and the frequency domain and are distinguished in a frequency division multiplexing mode;

the special CSI-RS resources of the special terminal and the public terminal are discrete in the time domain and the frequency domain and are distinguished in a frequency division multiplexing mode and a time division multiplexing mode;

the special CSI-RS resource of the public terminal and the special CSI-RS resource of the public terminal are discrete in the time domain and continuous in the frequency domain, and are distinguished in a time division multiplexing mode;

the special CSI-RS resource of the special terminal and the special CSI-RS resource of the public terminal are discrete in the time domain and continuous in the frequency domain, and are distinguished in a frequency division multiplexing mode;

the special CSI-RS resource of the public terminal and the special CSI-RS resource of the public terminal are discrete in the time domain and continuous in the frequency domain, and are distinguished in a frequency division multiplexing mode and a time division multiplexing mode;

The special CSI-RS resource of the public terminal and the special CSI-RS resource of the public terminal are continuous in time domain and discrete in frequency domain, and are distinguished in a time division multiplexing mode;

the special CSI-RS resource of the special terminal and the special CSI-RS resource of the public terminal are continuous in time domain and discrete in frequency domain, and are distinguished in a frequency division multiplexing mode;

the special CSI-RS resource of the public terminal and the special CSI-RS resource of the public terminal are continuous in time domain and discrete in frequency domain, and are distinguished in a frequency division multiplexing mode and a time division multiplexing mode;

the special CSI-RS resource of the special terminal and the special CSI-RS resource of the public terminal are continuous in time domain and frequency domain and are distinguished in a time division multiplexing mode;

the special CSI-RS resource of the special terminal and the special CSI-RS resource of the public terminal are continuous in time domain and frequency domain and are distinguished in a frequency division multiplexing mode;

the special CSI-RS resource of the special terminal and the special CSI-RS resource of the public terminal are continuous in time domain and frequency domain and are distinguished in a frequency division multiplexing mode and a time division multiplexing mode.

Still further, the method further comprises:

according to time index preference or frequency index preference the PRB or RE corresponding index obtained by the mode sequencing;

The method further comprises the steps of:

a preconfigured time domain index and/or frequency domain index.

And step 202, transmitting the measurement result to the base station.

And sending the measurement result to a base station so that the base station determines whether to switch the cell to which the terminal currently belongs according to the measurement result.

Specifically, if the base station determines that the cell to which the terminal belongs currently needs to be switched, receiving a cell switching instruction carrying a target neighbor cell sent by the base station, and switching from the cell to which the terminal belongs to the target neighbor cell according to the cell switching instruction.

Based on the above cell measurement method, the invention also discloses a cell switching method, which is applied to a base station, as shown in fig. 3, and comprises the following steps:

Step 301, initial measurement configuration information and terminal-specific CSI-RS resources are sent to the terminal.

And step 302, receiving a measurement result returned by the terminal.

And step 303, determining whether to switch the cell to which the terminal belongs currently according to the measurement result.

In the step, if switching, a cell switching instruction carrying a target neighbor cell is sent, so that the terminal is switched to the target neighbor cell from a cell to which the terminal belongs according to the cell switching instruction; otherwise, no handover indication is sent.

Based on the cell measurement method and the cell handover method provided by the present invention, detailed description will be made below with specific embodiments, where measurement resource configuration information in the following embodiments includes a terminal-specific CSI-RS resource and/or a synchronization signal block, and the terminal-specific CSI-RS resource includes a specific terminal-specific CSI-RS resource and a common terminal-specific CSI-RS resource.

Example 1

The embodiment introduces a method for measuring and switching based on a terminal-specific CSI-RS resource. In this embodiment, the initial measurement configuration information and the configuration information of the terminal-specific CSI-RS resources of the neighboring cell are sent in different steps, and the neighboring cell uses the configured terminal-specific CSI-RS resources to perform measurement, and the neighboring cell uses the newly configured terminal-specific CSI-RS resources to perform measurement. In this embodiment, the system may use multi-beam operation, for example, the system works in a high frequency band, and the beamforming gain is required to compensate for a larger path loss. The system may also employ single beam operation, such as using an omni-directional antenna to provide coverage over a larger angle.

The method comprises the following specific steps:

step 1: the base station transmits initial measurement configuration information to the terminal, including an object to be measured by the terminal, a neighbor cell list, a reporting mode, a measurement identifier, an event parameter, and the like (not including measurement resource configuration information).

Step 2: the terminal carries out measurement configuration according to measurement control issued by the base station, and sends measurement configuration completion information to the base station.

Step 3: the base station transmits measurement resource configuration information to the terminal, and the method comprises the following steps: a time-frequency resource (i.e., a terminal-dedicated CSI-RS resource) occupied by a terminal-dedicated CSI-RS resource (Channel State Information-Reference Signals, a channel state information measurement pilot) for neighbor cell measurement, a sequence resource used, and the like.

The base station can reserve the special-purpose terminal-specific CSI-RS resources for measurement and distinguish the special-purpose terminal-specific CSI-RS resources from common terminal-specific CSI-RS resources for other purposes. The dedicated CSI-RS resources may be continuous, discrete, or a combination of both. Wherein, the discrete and continuous may be directed to the frequency domain or the time domain. It should be noted that, a Resource refers to a Resource block formed by a time-frequency Resource Element (RE) or a plurality of Resource elements, and continuous refers to a Resource distribution of CSI-RS that occupies 2 or more continuous Resource elements or Resource Element blocks in a time domain or a frequency domain, and the discrete and continuous distributions are in a certain range (e.g., one slot, one subframe, one radio frame, etc.).

The dedicated terminal-specific CSI-RS resources and the common terminal-specific CSI-RS resources may be divided by one or more of a time division multiplexing (Time Division Multiplexing, TDM) scheme, a frequency division multiplexing (Time Division Multiplexing, FDM) scheme, and a code division multiplexing (Code Division Multiplexing, CDM) scheme.

The specific configuration modes are as follows:

(1a) As shown in fig. 5, the dedicated CSI-RS resource for the dedicated terminal and the dedicated CSI-RS resource for the common terminal are discrete in both time domain and frequency domain and are distinguished by means of time division multiplexing.

(2a) As shown in fig. 6, the dedicated CSI-RS resource for the dedicated terminal and the dedicated CSI-RS resource for the common terminal are discrete in both time domain and frequency domain and are distinguished by means of frequency division multiplexing.

(3a) As shown in fig. 7, the dedicated CSI-RS resource for the dedicated terminal is discrete from the dedicated CSI-RS resource for the common terminal in both time and frequency domains, and is distinguished by means of frequency division multiplexing and time division multiplexing.

(4a) As shown in fig. 8, the dedicated terminal-dedicated CSI-RS resource is discrete in time domain and continuous in frequency domain, and is simultaneously distinguished by means of time division multiplexing.

(5a) As shown in fig. 9, the dedicated terminal-dedicated CSI-RS resource is discrete in the time domain and continuous in the frequency domain, and is distinguished by a frequency division multiplexing manner.

(6a) As shown in fig. 10, the dedicated terminal-dedicated CSI-RS resource is discrete in time domain and continuous in frequency domain, and is distinguished from the common terminal-dedicated CSI-RS resource by means of frequency division multiplexing and time division multiplexing.

(7a) As shown in fig. 11, the dedicated terminal-dedicated CSI-RS resource is continuous in time domain and discrete in frequency domain, and is distinguished by means of time division multiplexing at the same time.

(8a) As shown in fig. 12, the dedicated terminal-dedicated CSI-RS resource is continuous in the time domain and discrete in the frequency domain from the common terminal-dedicated CSI-RS resource, and is distinguished by means of frequency division multiplexing.

(9a) As shown in fig. 13, the dedicated terminal-dedicated CSI-RS resource is continuous in time domain and discrete in frequency domain, and is distinguished from the common terminal-dedicated CSI-RS resource by means of frequency division multiplexing and time division multiplexing.

(10a) As shown in fig. 14, the dedicated terminal-dedicated CSI-RS resource is continuous with the common terminal-dedicated CSI-RS resource in both time and frequency domains, and is distinguished by means of time division multiplexing at the same time.

(11a) As shown in fig. 15, the dedicated terminal-dedicated CSI-RS resource is continuous with the common terminal-dedicated CSI-RS resource in both time and frequency domains, and is distinguished by means of frequency division multiplexing.

(12a) As shown in fig. 16, the dedicated terminal-dedicated CSI-RS resource is continuous with the common terminal-dedicated CSI-RS resource in both time and frequency domains, and is distinguished by means of frequency division multiplexing and time division multiplexing at the same time.

Of course, the base station may not reserve dedicated CSI-RS resources for measurement, but may use common dedicated CSI-RS resources as in other scenarios. The common terminal-specific CSI-RS resources may be continuous, discrete, or a combination of both. Wherein, the discrete and continuous may be directed to the frequency domain or the time domain. Note that continuous refers to a situation where 2 or more continuous resource elements are occupied in the time domain or the frequency domain, and the discrete and continuous distribution refers to a situation where the CSI-RS is distributed over a certain range (e.g., one slot, one subframe, one radio frame, etc.).

The specific configuration modes are as follows:

(1b) As shown in fig. 17, the common terminal-dedicated CSI-RS resources are discrete in both the frequency domain and the time domain, and different time resources correspond to the same frequency resource.

(2b) As shown in fig. 18, the common terminal-dedicated CSI-RS resources are discrete in both the frequency domain and the time domain, and different time resources correspond to different frequency resources.

(3b) As shown in fig. 19, the common terminal-dedicated CSI-RS resources are discrete in the time domain and continuous in the frequency domain, and different time resources correspond to the same frequency resource.

(4b) As shown in fig. 20, the common terminal-dedicated CSI-RS resources are discrete in the time domain and continuous in the frequency domain, and different time resources correspond to different frequency resources.

(5b) As shown in fig. 21, the common terminal-dedicated CSI-RS resources are continuous in the time domain and discrete in the frequency domain, and different time resources correspond to the same frequency resource.

(6b) As shown in fig. 22, the common terminal-dedicated CSI-RS resources are continuous in the time domain and discrete in the frequency domain, and different time resources correspond to different frequency resources.

(7b) As shown in fig. 23, the common terminal-dedicated CSI-RS resources are continuous in both the frequency domain and the time domain, and different time resources correspond to the same frequency resource.

(8b) As shown in fig. 24, the common terminal-dedicated CSI-RS resources are continuous in both the frequency domain and the time domain, and different time resources correspond to different frequency resources.

For the above-mentioned configuration of all terminal-specific CSI-RS resources, the base station allocates a terminal-specific CSI-RS resource for neighbor cell measurement to the terminal from all the terminal-specific CSI-RS resources available for measurement, where each neighbor cell may allocate one or more terminal-specific CSI-RS resources for measurement. When a plurality of terminal-specific CSI-RS resources (resource groups) for measurement are allocated, each terminal-specific CSI-RS resource may correspond to a different beam or a different synchronization signal block of a neighboring cell base station, so as to measure channel conditions of different beam synchronization signal blocks of the neighboring cell, which is beneficial to selecting an optimal serving cell and beam (synchronization signal block) after handover. When selecting multiple terminal-specific CSI-RS resources, the multiple terminal-specific CSI-RS resources may be selected by continuously selecting multiple terminal-specific CSI-RS resources in the frequency domain, selecting multiple terminal-specific CSI-RS resources in the frequency domain at equal intervals, selecting multiple terminal-specific CSI-RS resources in the time domain at equal intervals, or selecting multiple terminal-specific CSI-RS resources in the time sequence at equal intervals.

It should be noted that, under the condition that the base station configures and uses the CSI-RS resources dedicated to different terminals, the terminals may also use different sequences in a superposition manner or use different superposition codes (code division multiplexing) in the same sequence. In this case, the base station may inform the terminal of the sequence code used for measurement by transmitting different sequence indexes, different cyclic shift indexes of the same sequence, different superposition code indexes, or a combination of the above indexes.

It should also be noted that, when the base station allocates a single CSI-RS resource for measurement to the terminal, the terminal may be notified by:

(1a) The time domain index and the frequency domain index of the dedicated time-frequency resource are notified, respectively. The time domain index can be used as a subframe index of the wireless frame, or a time slot index of the subframe, or a symbol index of the time slot; another configuration mode of the time domain index is that a kth subframe after the current subframe is configured as a resource starting position for measurement by the configuration terminal, and a parameter k is notified; or configuring the kth symbol after the current symbol as the starting position of the dedicated channel resource for measurement by the terminal, and notifying the parameter k.

The frequency domain index may be characterized by an index of the physical resource block or by using an offset PRB or number of REs relative to the center of the upstream bandwidth or the bandwidth edge (e.g., the first PRB or RE).

(2a) The PRBs or REs of the terminal-specific CSI-RS resources available for measurement are ordered according to a time index priority or a frequency index priority mode, and corresponding indexes are added. The index is notified to the terminal when the measured terminal-specific CSI-RS resources are configured. The above-described manner of ordering PRBs or REs may be performed over the entire available bandwidth or over the bandwidth allocated to the respective terminal.

(3a) The timing is prescribed in advance while configuring the frequency resources. For example, it is predefined that after receiving the resource allocation information of the time-frequency resource for measurement, the terminal-specific CSI-RS resource for measurement is transmitted on the corresponding time-frequency resource of the kth subframe after the current subframe, or on the corresponding time-frequency resource of the kth mini subframe after the current mini subframe, or on the corresponding time-frequency resource of the kth slot after the current slot, or on the corresponding time-frequency resource of the kth symbol after the current symbol. The parameter k may be preset or may be sent to the terminal along with measurement configuration information.

When the frequency resource is configured, the physical resource block index or the resource element can be used for notification, or the notification can be performed by a bit map (bit-map) mode.

And when the base station allocates a plurality of terminal-specific CSI-RS resources (resource groups) for measurement to the terminal, the terminal may be informed by:

(1b) The number of time-frequency resources in the time-frequency resource group for measurement is notified, and each time-frequency resource configuration for measurement. The configuration and notification of each time-frequency resource for measurement may take several forms as described above, with only a single time-frequency resource being configured.

(2b) If the frequency division multiplexing mode is adopted to distinguish each time-frequency resource in the time-frequency resource group for measurement, a predetermined mode is adopted to configure and determine a time-domain index, for example, the first subframe after the kth subframe after the configuration information is received, the first time slot after the kth time slot or the first symbol after the kth symbol is predetermined, and the first time slot or the first symbol after the kth symbol is used as the time-domain index of the time-frequency resource of the access channel for quick access; the time domain index (i.e. parameter k) indicated by the delay may also be notified by the physical downlink control channel or transmitted to the terminal along with measurement configuration information.

For the frequency domain index, i.e. the frequency domain position of the time-frequency resource used for measurement, the following manner may be configured and notified:

(i) If the allocated resources are arranged according to a certain rule in the frequency domain, for example, the allocated resources are distributed at fixed intervals in the frequency domain, the position of the first time-frequency resource in the frequency domain (for example, the index of the first physical resource block of the first time-frequency resource) can be notified, and the frequency domain interval (for example, the number of physical resource blocks is used as a unit) of two adjacent time-frequency resources and the number of time-frequency resources in the frequency domain can be notified. Fig. 25 is a schematic diagram showing a frequency domain resource allocation method of the dedicated channel time-frequency resource in this way.

In the above example, one configured terminal-specific CSI-RS resource group for measurement is composed of 3 terminal-specific CSI-RS resources, which occupy the same time resource (e.g., subframe, slot or symbol), and the three specific access channels are spaced by the same number of physical resource blocks (m physical resource blocks or resource elements in the figure). When informing the terminal of the configuration of the terminal-specific CSI-RS resources for measurement, the base station informs the frequency domain location of the first terminal-specific CSI-RS resource for measurement, such as the first physical resource block or resource element index, the interval m between the terminal-specific CSI-RS resources for measurement, and the number of terminal-specific CSI-RS resources for measurement. It should be noted that, another configuration manner is to determine the frequency domain position of the first CSI-RS resource dedicated for measurement, the interval of the CSI-RS resource dedicated for measurement, or the number of CSI-RS resources dedicated for measurement in a predetermined manner or in a manner of transmitting the measurement configuration information to the terminal together.

(ii) The determination of the frequency domain index is performed by means of a bit map (bit-map). Dividing the time-frequency resource used for measurement into resources according to physical resource blocks/resource elements or integral physical resource blocks/resource elements Groups, and adding an index to each resource group, defining a bit group b= [ b ] ₁ ，...，b _M ]The number of elements in the bit group is the same as the number of the divided resource groups, and the ith element b in the bit group _i The value of (1) is 0 or 1, which indicates whether the ith resource group is available for measurement, wherein 0 indicates that it is not used for measurement, and 1 indicates that it is used for measurement.

(iii) Directly informing the frequency domain position of each terminal-specific CSI-RS resource for measurement, for example informing the index of the first physical resource block or resource element of each terminal-specific CSI-RS resource for measurement.

(3b) If the time division multiplexing mode is adopted to distinguish each time-frequency resource in the time-frequency resource group for measurement, a preset mode is adopted to configure and determine a frequency domain index, for example, the frequency domain resource for measurement is preset, and the frequency domain position of a physical resource block or a resource element for measurement in the resource group is determined; or by determining the frequency domain location of the physical resource blocks or resource elements used for the measurement by being transmitted to the terminal along with the measurement configuration information.

(i) If the allocated resources are arranged according to a certain rule in the time domain, for example, the allocated resources are distributed at fixed intervals in the time domain, the time domain position of each terminal-specific CSI-RS resource for measurement in the resource group can be determined by notifying the time domain index of the first terminal-specific CSI-RS resource for measurement, the time domain interval of the adjacent terminal-specific CSI-RS resources for measurement and the number of the terminal-specific CSI-RS resources for measurement. Wherein, the time domain interval of the adjacent terminal-specific CSI-RS resources for measurement can also be characterized by the density of the terminal-specific CSI-RS resources for measurement. FIG. 26 shows a dedicated channel employing this approach schematic diagram of time domain resource allocation mode of time-frequency resource.

(ii) Directly informing time domain indexes of each terminal-specific CSI-RS resource used for measurement in the terminal-specific CSI-RS resource group used for measurement, wherein the time domain indexes can be represented by one or a combination of radio frame indexes, subframe indexes, time slot indexes or symbol indexes.

(4b) If the time division multiplexing and frequency division multiplexing are simultaneously used to distinguish the terminal-specific CSI-RS resources used for measurement from each of the terminal-specific CSI-RS resource groups used for measurement, and each of the terminal-specific CSI-RS resources used for measurement is configured according to a certain rule in the time domain and the frequency domain, the configuration and notification of the terminal-specific CSI-RS resources used for measurement may be performed by using the combination of the modes (2 b) and (3 b). For example, if the terminal-specific CSI-RS resources for measurement are distributed at intervals in both the frequency domain and the time domain, the frequency domain interval, the time domain interval (or the time domain density), the time domain of the first terminal-specific CSI-RS resource for measurement, the frequency domain resource location (time domain, frequency domain index), and the number of terminal-specific CSI-RS resources for measurement in the time domain, frequency domain directions may be notified, as shown in fig. 27.

In addition, the measurement configuration information includes both the measurement initial configuration information in step 1 and the measurement resource configuration information in step 3. In addition, the allocation mode and the notification mode of the terminal-dedicated CSI-RS resource for measurement can be the same or different for different cells. While the terminal-specific CSI-RS resources for measurement may be simultaneously configured to one or more terminals.

Step 4: the terminal measures the cell based on the initial measurement configuration information received in the step 1 and the configured terminal-specific CSI-RS resources of the cell, and optionally measures the neighbor cell based on the initial measurement configuration information received in the step 1 and the configuration information of the configured terminal-specific CSI-RS resources used for measurement of the neighbor cell received in the step 3, and reports the measurement result to the base station.

It should be noted that, for the same neighbor cell, the base station may configure one or more terminal-specific CSI-RS resources for measurement. When multiple terminal-specific CSI-RS resources are configured for measurement, each of the terminal-specific CSI-RS resources may correspond to a different synchronization signal Block (Synchronization Signal Block, SS Block) or a different beam of the neighbor cell base station.

Step 5: and the base station makes a decision of terminal switching based on the measurement result and the radio resource management information received in the step 4.

Step 6: if the decision in step 5 is a handover, the base station determines an appropriate target cell, or an appropriate target cell and a beam/synchronization signal block corresponding to the appropriate target cell, and instructs the terminal to perform the final handover.

It should be noted that, in the above method, step 1 and step 3 may be combined, and the base station may send measurement configuration information to the terminal in step 1, where the measurement configuration information includes measurement resource configuration information, an object to be measured by the terminal, a neighbor cell list, a reporting mode, a measurement identifier, an event parameter, and the like. The terminal then sends a measurement configuration complete message in step 2 and reports the measurement result in step 3. The base station makes a switching decision in step 4, and if the switching decision is made, the base station and the terminal complete the switching process in step 5.

It should be noted that, for measurement of the present cell (the cell to which the terminal belongs), the terminal-specific CSI-RS resource configured by the present cell may be used, or the newly configured terminal-specific CSI-RS resource for measurement may be used.

In addition, it should be noted that, besides configuring the CSI-RS resource dedicated for the terminal, the terminal may also perform measurement of the own cell and the neighboring cell according to the synchronization signal blocks of the own cell and the neighboring cell.

The method for measuring and switching the cells is not only suitable for switching the cells within the same gNB (intra-gNB), but also suitable for switching the cells between different gNBs (inter-gNB) (such as X2 switching and S1 switching).

Example two

On the basis of the first embodiment, this embodiment introduces a method for measuring and switching based on the terminal-specific CSI-RS resource after adjustment. In this embodiment, the initial measurement configuration information and the configuration information of the terminal-dedicated CSI-RS resources of the own cell and the neighboring cell are sent in different steps, and new terminal-dedicated CSI-RS resources are allocated for measurement for the own cell and the neighboring cell. In addition, in this embodiment, the system may use multi-beam operation, for example, the system works in a high frequency band, and the beamforming gain is required to compensate for a larger path loss. The system may also employ single beam operation, such as using an omni-directional antenna to provide coverage over a larger angle.

Step 1: the base station sends the initial measurement configuration information to the terminal, wherein the initial measurement configuration information comprises an object to be measured by the terminal, a neighbor cell list, a reporting mode, a measurement identifier, an event parameter and the like.

Step 3: the base station transmits measurement resource configuration information to the terminal, and the method comprises the following steps: time-frequency resources occupied by the special CSI-RS resources of the terminal for measuring the cell and the neighbor cell, used sequence resources and the like.

The base station may reserve dedicated CSI-RS resources for measurement, separate the dedicated CSI-RS resources from common terminal-dedicated CSI-RS resources for other purposes, or may use the dedicated CSI-RS resources for measurement. The terminal-specific CSI-RS resources used for measurement may be continuous in the time domain and the frequency domain, may be discrete, or may be a combination of both. The different terminal-specific CSI-RS resources for measurement may be distinguished by a combination of one or more of time division multiplexing, frequency division multiplexing, code division multiplexing. For the same cell, the base station may allocate one or more terminal-specific CSI-RS resources for measurement to the terminal, and then notify the terminal in different manners. The above specific resource allocation and notification manner are specifically described in the first embodiment.

Step 4: the terminal measures the cell based on the initial measurement configuration information received in the step 1 and the terminal-specific CSI-RS resource configuration information for measurement of the cell received in the step 3, optionally measures the neighbor cell based on the initial measurement configuration information received in the step 1 and the configuration information for the terminal-specific CSI-RS resource for measurement of the neighbor cell received in the step 3, and reports the measurement result to the base station.

Step (a) 5: and the base station makes a decision of terminal switching based on the measurement result and the radio resource management information received in the step 4.

Embodiment III:

the embodiment introduces a method for measuring and switching based on a terminal-specific CSI-RS resource. In this embodiment, the initial measurement configuration information and the configuration information of the CSI-RS resources dedicated for the terminal of the neighboring cell are sent in the same step, and the cell uses the configured CSI-RS resources dedicated for the terminal to perform measurement, and the neighboring cell uses the newly configured CSI-RS to perform measurement. In this embodiment, the system may use multi-beam operation, for example, the system works in a high frequency band, and the beamforming gain is required to compensate for a larger path loss. The system may also employ single beam operation, such as using an omni-directional antenna to provide coverage over a larger angle.

Step 1: the base station sends the initial measurement configuration information and measurement resource configuration information to the terminal, wherein the initial measurement configuration information and measurement resource configuration information comprise an object to be measured by the terminal, a neighbor cell list, a reporting mode, a measurement identifier, event parameters, time-frequency resources occupied by a terminal-dedicated CSI-RS resource for neighbor cell measurement, used sequence resources and the like

Step 3: the terminal measures the cell based on the initial measurement configuration information received in the step 1 and the configured terminal-specific CSI-RS resources of the cell, and optionally measures the neighbor cell based on the initial measurement configuration information received in the step 1 and the configuration information of the configured terminal-specific CSI-RS resources used by the neighbor cell for measurement, and reports the measurement result to the base station.

Step 4: the base station makes a decision of terminal switching based on the measurement result and the radio resource management information received in step 3.

Step 5: if the decision in step 4 is a handover, the base station determines an appropriate target cell, or an appropriate target cell and a beam/synchronization signal block corresponding to the appropriate target cell, and instructs the terminal to perform the final handover.

Example IV

The embodiment introduces a method for measuring and switching based on a terminal-specific CSI-RS resource. In this embodiment, the initial measurement configuration information and the configuration information of the CSI-RS resources dedicated for the terminals of the own cell and the neighboring cell are sent in the same step, and the own cell and the neighboring cell both use the newly configured CSI-RS resources dedicated for the terminals to perform measurement. In this embodiment, the system may use multi-beam operation, for example, the system works in a high frequency band, and the beamforming gain is required to compensate for a larger path loss. The system may also employ single beam operation, such as using an omni-directional antenna to provide coverage over a larger angle.

Step 1: the base station sends the initial measurement configuration information and measurement resource configuration information to the terminal, wherein the initial measurement configuration information and the measurement resource configuration information comprise an object to be measured by the terminal, a neighbor cell list, a reporting mode, a measurement identifier, event parameters, time-frequency resources occupied by a terminal-dedicated CSI-RS resource for measuring the cell and the neighbor cell, used sequence resources and the like.

Step 3: the terminal measures the cell based on the initial measurement configuration information received in the step 1 and the configuration information of the terminal-dedicated CSI-RS resource used for measuring by the cell, and optionally measures the neighbor cell based on the initial measurement configuration information received in the step 1 and the configuration information of the terminal-dedicated CSI-RS resource used for measuring by the neighbor cell, and reports the measurement result to the base station.

Example five

The embodiment introduces a synchronization-based method a method for measuring and switching signal blocks. In this embodiment, the system may employ multi-beam operation, for example where the system is operating in a high frequency band, the beamforming gain is required to compensate for the larger path loss. The system may also employ single beam operation, such as using an omni-directional antenna to provide coverage over a larger angle.

Step 1: the base station sends measurement configuration information to the terminal, wherein the measurement configuration information comprises an object to be measured by the terminal, a neighbor cell list, a reporting mode, a measurement identifier, an event parameter and the like.

Step 3: the terminal measures the cell based on the initial measurement configuration information received in the step 1 and the configured terminal-specific CSI-RS resource of the cell or the synchronization signal block of the cell, optionally measures the neighbor cell based on the initial measurement configuration information received in the step 1 and the synchronization signal block of the neighbor cell, and reports the measurement result to the base station.

Based on the cell measurement method provided by the present invention, the present invention also provides a cell measurement device, as shown in fig. 28, including:

a processing unit 2801, configured to measure, according to the initial measurement configuration information and the terminal dedicated channel state information, at least one of a measurement pilot CSI-RS resource and a synchronization signal block, each of a cell to which the terminal belongs and a neighbor cell in a cell list, thereby obtaining a measurement result;

a transmitting unit 2802 configured to transmit the measurement result to the base station.

Based on the cell measurement method provided by the present invention, the present invention also provides a cell switching device, as shown in fig. 29, including:

a transmitting unit 2901, configured to transmit initial measurement configuration information and terminal-specific CSI-RS resources to a terminal;

a receiving unit 2902, configured to receive a measurement result returned by the terminal;

a processing unit 2903, configured to determine whether to switch a cell to which the terminal currently belongs according to the measurement result; and when the switching is determined, transmitting a cell switching instruction carrying the target neighbor cell.

The cell measurement method and device, and the cell switching method and device described by the invention can be applied to future 5G wireless networks without public cell reference signals, and flexibly configure cells needing to be measured and corresponding terminal-dedicated CSI-RS resources for measurement according to information such as wireless resource management information, cell load and the like, thereby remarkably improving the efficiency and performance of the measurement and switching process.

Based on the embodiments provided in the present invention described above, as shown in fig. 30, an example wireless communication system 100 according to an embodiment of the present invention is shown, in which a UE detects indication information. The wireless communication system 100 includes one or more fixed infrastructure elements forming a network distributed over a geographic area. The base unit may also be referred to as an Access Point (AP), an Access Terminal (AT), a base station BS (Base Station), a Node-B (Node-B), and an evolved NodeB (eNB), a next generation base station (gNB), or other terminology used in the art. The access point in embodiments of the present invention may be replaced with any of the terms described above. As shown in fig. 30, one or more base stations 101 and 102 serve several mobile stations MS (Mobile Station) or UEs or terminal devices or users 103 and 104 in a service area, e.g., a cell or cell sector area. In some systems, one or more BSs are communicatively coupled (coupled to) to a controller forming an access network, the controller being communicatively coupled to one or more core networks. The disclosed examples are not limited to any one particular wireless communication system.

Base stations 101 and 102 transmit Downlink (DL) communication signals 112 and 113 to UEs 103 and 104, respectively, in the time and/or frequency domain. UEs 103 and 104 communicate with one or more base units 101 and 102 via Uplink (UL) communication signals 111 and 114, respectively. In one embodiment, the mobile communication system 100 is an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM)/orthogonal frequency division multiplexing access (Orthogonal Frequency Division Multiple Access, OFDMA) system comprising a plurality of base stations including base station 101, base station 102, and a plurality of UEs including UE103 and UE104. Base station 101 communicates with UE103 via uplink communication signals 111 and downlink communication signals 112. When a base station has downlink packets to send to UEs, each UE obtains a downlink allocation (resource), such as a set of radio resources in the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) or the narrowband downlink shared channel NPDSCH (narrowband Physical Downlink Shared Channel, NPDSCH). When the user equipment needs to send a packet in uplink to the base station, the UE obtains an grant from the base station, wherein the grant allocation contains a physical downlink uplink shared channel (Physical Uplink Shared Channel, PUSCH) or a narrowband uplink shared channel NPUSCH of a set of uplink radio resources. The UE obtains downlink or uplink scheduling information from a PDCCH (Physical Downlink Control Channel ), or MPDCCH, or EPDCCH or NPDCCH, specific to itself. Downlink or uplink scheduling information and other control information carried by the downlink control channel are referred to as downlink control information (Downlink Control Information, DCI). Fig. 30 also shows different physical channels for the downlink 112 and uplink 111 examples. The downlink 112 includes a PDCCH or EPDCCH or NPDCCH or MPDCCH 121, a PDSCH or NPDSCH 122, a physical control format indicator channel (Physical Control Formation Indicator Channel, PCFICH) 123, a physical multicast channel (Physical Multicast Channel, PMCH) 124, a physical broadcast channel (Physical Broadcast Channel, PBCH) or narrowband physical broadcast channel NPBCH125, a physical hybrid automatic request retransmission indicator channel (Physical Hybrid Automatic Repeat Request Indicator Channel, PHICH) 126, and a primary synchronization signal (Primary Synchronization Signal, PSS), a secondary synchronization signal (Secondary Synchronization Signal, SSS), or a narrowband primary secondary synchronization signal NPSS/NSSS 12x. The downlink control channel 121 transmits a downlink control signal to a user. DCI120 is carried over downlink control channel 121. PDSCH122 transmits data information to UEs. PCFICH123 transmits information for decoding PDCCH, such as a number of symbols dynamically indicating the number of symbols used by PDCCH 121. PMCH124 carries broadcast multicast information. The PBCH or NPBCH125 carries a master information block (Master Information Block, MIB) for UE early discovery and cell-wide coverage. The PHICH carries hybrid automatic repeat request HARQ information indicating whether the base station correctly receives the transmission signal thereon. The uplink 111 includes a physical uplink control channel (Physical Uplink Control Channel, PUCCH) 131, a PUSCH 132, and a physical random access channel (Physical Random Access Channel, PRACH) 133 carrying random access information.

In one embodiment, wireless communication network 100 uses an OFDMA or multicarrier architecture, including adaptive modulation and coding (Adaptive Modulation and Coding, AMC) on the downlink and a next generation single carrier FDMA architecture or multicarrier OFDMA architecture for UL transmissions. FDMA-based single carrier architectures include Interleaved Frequency Division Multiple Access (IFDMA), localized FDMA (LFDMA), IFDMA, or extended discrete fourier transform orthogonal frequency division multiplexing (DFT-spread OFDM, DFT-SOFDM) of LFDMA. In addition, various enhanced Non-interleaved multiple access NOMA architectures for OFDMA systems are included, such as PDMA (Pattern division multiple access), SCMA (Sparse code multiple access, MUSA (Multi-user shared access), LCRS FDS (Low code rate spreading Frequency domain spreading), NCMA (Non-orthogonal coded multiple access), RSMA (Resource spreading multiple access), IGMA (Interleave-grid multiple access), LDS-SVE (Low density spreading with signature vector extension), LSSA (Low code rate and signature based shared access), NOCA (Non-orthogonal coded access), IDMA (Interleave division multiple access), RDMA (Repetition division multiple access), GOCA (Group orthogonal coded access), WSMA (Welch-bound equality based spread MA), and the like.

In an OFDMA system, a remote unit is served by allocating downlink or uplink radio resources, which typically contain a set of subcarriers over one or more OFDM symbols. Example OFDMA protocols include the LTE and IEEE 802.16 standards of the evolution of the 3GPP UMTS standard. The architecture may also include the use of transmission techniques such as multi-carrier CDMA (MC-CDMA), multi-carrier direct sequence code division multiple access (multi-carrier direct sequence CDMA, MC-DS-CDMA), orthogonal frequency code division multiplexing (Orthogonal Frequency and Code Division Multiplexing, OFCDM) for one-or two-dimensional transmission. Alternatively, it may be based on simpler time and/or frequency division multiplexing/multiple access techniques, or a combination of these different techniques. In an alternative embodiment, the communication system may use other cellular communication system protocols including, but not limited to, TDMA or direct sequence CDMA.

Those skilled in the art will appreciate that the present application includes apparatuses related to performing one or more of the operations described herein. These devices may be specially designed and constructed for the required purposes, or may comprise known devices in general purpose computers. These devices have computer programs stored therein that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., a computer) readable medium or any type of medium suitable for storing electronic instructions and respectively coupled to a bus, including, but not limited to, any type of disk (including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks), ROMs (Read-Only memories), RAMs (Random AcceSS Memory, random access memories), EPROMs (EraSable Programmable Read-Only memories), EEPROMs (Electrically EraSable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions can be implemented in a processor of a general purpose computer, special purpose computer, or other programmable data processing method, such that the blocks of the block diagrams and/or flowchart illustration are implemented by the processor of the computer or other programmable data processing method.

Those of skill in the art will appreciate that the various operations, methods, steps in the flow, acts, schemes, and alternatives discussed in the present invention may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed herein may be alternated, altered, rearranged, disassembled, combined, or eliminated. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present invention may also be alternated, altered, rearranged, decomposed, combined, or deleted.

The foregoing is only a partial embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A method performed by a terminal in a communication system, comprising the steps of:

measuring the adjacent cells in the cell list and the cell to which the terminal belongs respectively according to the initial measurement configuration information and the terminal dedicated channel state information measurement pilot frequency CSI-RS resource to obtain a measurement result;

transmitting the measurement result to a base station so that the base station determines whether to switch the cell to which the terminal currently belongs according to the measurement result;

the terminal-specific CSI-RS resource comprises at least one of a public terminal-specific CSI-RS resource and a specific terminal-specific CSI-RS resource.

2. The method of claim 1, wherein the dedicated terminal-dedicated CSI-RS resources and the common terminal-dedicated CSI-RS resources are partitioned by at least one of a time division multiplexing TDM scheme, a frequency division multiplexing FDM scheme, and a code division multiplexing CDM scheme.

3. The method of claim 1, the terminal-specific CSI-RS resource further comprises a pre-configured terminal-specific CSI-RS resource, the measuring the cell to which the terminal belongs according to the initial measurement configuration information and the terminal-specific CSI-RS resource, to obtain a measurement result, including:

4. The method according to claim 1, wherein measuring the cell to which the terminal belongs and the neighbor cells in the cell list according to the initial measurement configuration information and the terminal CSI-RS resource to obtain the measurement result comprises:

and respectively measuring the cell to which the terminal belongs and the neighbor cells in the cell list according to the initial measurement configuration information, the terminal-specific CSI-RS resource and the synchronous signal block to obtain a measurement result.

5. The method according to claim 1, wherein the method further comprises:

And receiving the terminal-specific CSI-RS resource sent by the base station.

6. The method according to claim 1, wherein the method further comprises:

receiving the initial measurement configuration information and a terminal-specific CSI-RS resource sent by a base station;

7. The method according to claim 1, wherein the configuration mode of the CSI-RS resources dedicated for the common terminal includes any one of the following:

8. The method according to claim 4, wherein the terminal-specific CSI-RS resource includes a pre-configured terminal-specific CSI-RS resource, and the measuring the cell to which the terminal belongs and the neighbor cells in the cell list according to the initial measurement configuration information, the terminal-specific CSI-RS resource, and the synchronization signal block to obtain the measurement result includes:

9. The method as recited in claim 1, further comprising:

and respectively measuring the cell to which the terminal belongs and the neighbor cells in the cell list according to the initial measurement configuration information and the synchronous signal block to obtain a measurement result.

10. The method according to claim 9, wherein the measuring the cell to which the terminal belongs and the neighbor cells in the cell list according to the initial measurement configuration information and the synchronization signal block to obtain the measurement result includes:

11. The method according to claim 2, wherein the configuration mode of the dedicated CSI-RS resource of the dedicated terminal includes any one of the following:

the dedicated CSI-RS resource for the dedicated terminal and the dedicated CSI-RS resource for the common terminal are continuous in both time and frequency domains, and at the same time, distinguishing by a time division multiplexing mode;

12. The method according to any one of claims 1-11, further comprising:

receiving any one of the following information to determine the number of terminal-specific CSI-RS resources as one:

13. The method according to any one of claims 1-11, further comprising:

receiving any one of the following information to determine the number of terminal-specific CSI-RS resources as at least two:

A preconfigured time domain index and/or frequency domain index.

14. A method performed by a base station in a communication system, comprising the steps of:

transmitting initial measurement configuration information and terminal dedicated channel state information measurement pilot channel state information (CSI-RS) resources to a terminal;

receiving a measurement result returned by the terminal, wherein the measurement result is obtained by the terminal according to the initial measurement configuration information and the terminal-specific CSI-RS resource by measuring the cell to which the terminal belongs and the neighbor cells in a cell list;

if the terminal is switched, transmitting a cell switching instruction carrying a target neighbor cell, so that the terminal is switched from a cell to which the terminal belongs to the target neighbor cell according to the cell switching instruction;

15. The method of claim 14, wherein the terminal-specific CSI-RS resources and the common terminal-specific CSI-RS resources are partitioned by at least one of a time division multiplexing, TDM, frequency division multiplexing, FDM, and code division multiplexing, CDM, scheme.

16. The method according to claim 14 or 15, wherein the terminal-specific CSI-RS resources further comprise pre-configuring terminal-specific CSI-RS resources.

17. The method according to any one of claims 14-16, further comprising:

and receiving an initial measurement configuration completion message returned by the terminal.

18. The method according to claim 14, wherein the configuration mode of the CSI-RS resources dedicated for the common terminal includes any one of the following:

19. The method according to any one of claims 14-18, wherein the configuration mode of the dedicated CSI-RS resource of the dedicated terminal includes any one of the following:

20. The method according to any one of claims 14-18, further comprising:

and sending any one of the following information to determine the number of the terminal-specific CSI-RS resources as one:

21. The method according to any one of claims 14-18, further comprising:

and sending any one of the following information to determine that the number of the terminal-specific CSI-RS resources is at least two:

a preconfigured time domain index and/or frequency domain index.

22. A terminal is characterized by comprising a processor and a memory,

the memory stores a computer program;

the computer program is provided to the processor for execution by the processor to implement the method of any one of claims 1-13.

23. A base station is characterized by comprising a processor and a memory,

the memory stores a computer program;

the computer program is provided to the processor for execution by the processor to implement the method of any one of claims 14-21.