CN108811010A

CN108811010A - Mobility measurements method, CSI-RS resource configuration method and equipment

Info

Publication number: CN108811010A
Application number: CN201710648824.3A
Authority: CN
Inventors: 向铮铮; 罗俊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-05-05
Filing date: 2017-08-01
Publication date: 2018-11-13
Anticipated expiration: 2037-08-01
Also published as: CN108811010B

Abstract

The embodiment of the invention discloses a kind of mobility measurements method, CSI-RS resource configuration method and equipment, can mitigate the burden at the ends UE, promote the service quality of UE communication.The method of the embodiment of the present invention includes：First base station generates CSI-RS sequences, which is the sequence that the identification information based on UE generates, and later, which sends the CSI-RS sequences to UE, so that UE carries out mobility measurements.In the embodiment of the present invention, the CSI-RS for carrying out mobility measurements is what the identification information based on UE generated, so that UE using CSI-RS when carrying out mobility measurements, cell ID is obtained without being interacted with the base station for generating the CSI-RS, the CSI-RS of base station transmission can be properly received according to the identification information of itself, to reduce the signaling overheads at the ends UE, the burden at the ends UE is alleviated, improves the communication quality of UE.

Description

Mobility measurement method, CSI-RS resource allocation method and equipment

Technical Field

The present application relates to the field of communications, and in particular, to a mobility measurement method, a CSI-RS resource allocation method, and a device.

Background

Cell switching is an important process of a wireless network, and plays a very important role in guaranteeing the wireless communication quality of User Equipment (UE). In a wireless network, a base station of each cell sends a reference signal, and a UE in the cell receives the reference signal sent by the base station of the cell and the reference signals sent by base stations of neighboring cells, and performs mobility measurement: that is, the UE measures the quality of the reference signal transmitted by the base station of the cell and the quality of the reference signal transmitted by the base station of the neighboring cell. The UE reports the mobility measurement result to the base station of the cell, and the base station of the cell determines whether the UE is switched to other cells according to the information reported by the UE.

A Channel State Information Reference Signal (CSI-RS) is an important Reference Signal in a Long Term Evolution (LTE) network. In a 5G network, mobility measurements may be made through CSI-RS.

In the prior art, since one key parameter in the CSI-RS sequence generation process is cell-level, CSI-RS sequences transmitted by different cells are associated with the cell. If the CSI-RS is used for mobility measurement in the cell handover process, at least signaling interaction with the base station of the target cell to be handed over is required to obtain the cell identifier of the target cell, for example: and the cell identification of the target cell is analyzed from the synchronous signal of the target cell, so that the CSI-RS sent by the base station of the target cell can be correctly received. Therefore, the burden of UE cell switching is increased, and the service quality of UE communication is reduced.

Disclosure of Invention

The embodiment of the invention provides a mobility measurement method, a CSI-RS resource configuration method and equipment, which can reduce the burden of a UE (user equipment) end and improve the service quality of UE communication.

A first aspect of an embodiment of the present invention provides a mobility measurement method, where the method includes:

the first base station generates a CSI-RS sequence which is generated based on the identification information of the UE, and then the base station transmits the CSI-RS sequence to the UE for the UE to perform mobility measurement.

In the embodiment of the invention, the CSI-RS for carrying out mobility measurement is generated based on the identification information of the UE, so that the UE can correctly receive the CSI-RS sent by the base station according to the identification information of the UE without interacting with the base station sending the CSI-RS to obtain the cell identification when receiving the CSI-RS and carrying out mobility measurement, thereby reducing the signaling overhead of the UE, lightening the burden of the UE and improving the communication quality of the UE.

Optionally, the identification information of the UE may be one of the following identification information of the UE: the UE comprises a cell radio temporary identifier C-RNTI of the UE, a UE group identifier of a UE group where the UE is located and an exclusive identifier of the UE.

Optionally, the first base station may generate the CSI-RS sequence in the following manner: and generating a CSI-RS sequence based on the first sequence, wherein the first sequence is initialized by a first initial quantity which is a function of the parameter corresponding to the identification information of the UE.

In a possible way, the CSI-RS sequence may be generated by following the definition of the CSI-RS sequence in the LTE network standard (Release13), and passing the first sequence, i.e. the pseudo-random sequence c (i), through the first initial quantity c (i)_initInitialization, c_initis a parameter α corresponding to the identification information about the UE_UEA function of (a).

Optionally, the parameter corresponding to the UE identification information may be a decimal value corresponding to the UE identification information.

Optionally, a first initial quantity c_initThe function of (d) can be defined as:

or the like, or, alternatively,

wherein, c is_initIs the first initial amount, n'_sIs the time slot number in a radio frame or the value obtained according to the time slot number in a radio frame, and the l is the orthogonal frequency division in a time slotA sequence number of multiplexed OFDM symbols, saidThe parameter corresponding to the C-RNTI of the UE, the parameter corresponding to the exclusive identification of the UE or the parameter corresponding to the UE group identification of the UE group in which the UE is positioned, the N_CPIs the value corresponding to the type of the cyclic prefix of the subframe.

or the like, or, alternatively,

wherein ,indicating a rounding down. C is mentioned_initIs the first initial amount, n'_sIs the time slot number in a wireless frame or the value obtained according to the time slot number in a wireless frame, the l is the serial number of the orthogonal frequency division multiplexing OFDM symbol in a time slot, theThe parameter corresponding to the C-RNTI of the UE, the parameter corresponding to the exclusive identification of the UE or the parameter corresponding to the UE group identification of the UE group in which the UE is positioned, the N_CPA value corresponding to a type of a cyclic prefix of a subframe, saidIs the maximum value of the cell identity or the virtual cell identity.

The UE may be a UE served by a neighboring base station (second base station) of the first base station, or may be a UE served by the first base station.

When the UE is a UE served by a second base station, the method further comprises: when the UE enters the coverage of the first base station, the first base station needs to obtain the identification information of the UE from the second base station first, so as to generate the CSI-RS according to the identification information of the UE.

Further, in order to reduce system resource overhead for CSI-RS and enable the UE to correctly receive the CSI-RS sequence transmitted by the base station. The first base station configures CSI-RS resource configuration information to allocate CSI-RS time-frequency resources for sending the CSI-RS sequences; and sending the CSI-RS resource configuration information to the second base station, and then sending the CSI-RS resource configuration information to the UE by the second base station. And the first base station sends the CSI-RS sequence to the UE actually on the distributed CSI-RS time frequency resource. Therefore, the UE can correctly receive the CSI-RS sequence sent by the base station on the CSI-RS time frequency resource.

In this scenario, when the UE moves to the coverage of the neighboring cell, the CSI-RS sent by the base station of the neighboring cell can be correctly received according to the identification information of the UE without acquiring the cell identifier of the neighboring cell, so as to perform mobility measurement. Therefore, signaling overhead of the UE end is reduced, burden of the UE end is relieved, and communication quality of the UE is improved.

When the UE is a UE served by the first base station, the first base station also needs to configure CSI-RS resource configuration information and send the CSI-RS resource configuration information to the UE. And the first base station actually sends the CSI-RS sequence to the UE on the CSI-RS time-frequency resource distributed by the CSI-RS resource configuration information.

In such a scenario, the UE can correctly receive the CSI-RS sent by the base station of the cell according to the identification information of the UE, so as to perform mobility measurement. The decoupling of the UE and the base station can be further realized, so that the burden of the UE end can be reduced.

Optionally, when the first base station configures the CSI-RS resource configuration information, the first base station allocates and sends a time-frequency resource and/or a code domain resource of the CSI-RS according to the UE information of the cell and the UE information reported by the base station of the neighboring cell.

In a second aspect, an embodiment of the present invention further provides a CSI-RS resource allocation method, where the method includes:

when the second base station determines that the UE enters the coverage area of the first base station, the second base station sends the identification information of the UE to the first base station, and the identification information of the UE is used for the first base station to generate a CSI-RS sequence; the second base station receives CSI-RS resource configuration information from the first base station, wherein the CSI-RS resource configuration information comprises CSI-RS time-frequency resources of a CSI-RS sequence sent to the UE by the first base station; and the second base station sends the CSI-RS resource configuration information to the UE so that the UE receives the CSI-RS sequence on the CSI-RS time-frequency resource for the UE to measure the mobility.

Optionally, the identity information of the UE may be one of a cell radio temporary identity C-RNTI of the UE, a UE group identity of a UE group in which the UE is located, or an exclusive identity of the UE.

In the embodiment of the present invention, the first base station may obtain the identification information of the UE from the base station (i.e., the second base station) currently serving the UE, generate the CSI-RS sequence for the UE according to the identification information, allocate the resource for transmitting the CSI-RS sequence, and transmit the resource to the UE through the base station currently serving the UE. Thereby reducing the system resource overhead of the CSI-RS. And the UE can correctly receive the CSI-RS sent by the base station of the neighboring cell (i.e. the first base station) according to the identification information of the UE itself without acquiring the cell identifier of the neighboring cell (i.e. the cell served by the first base station), so as to perform mobility measurement. The burden of the UE end can be reduced, and the communication quality of the UE is improved.

In a third aspect, an embodiment of the present invention further provides a mobility measurement method, where the method includes:

the UE receives a CSI-RS sequence, which is a sequence generated based on identification information of the UE, from a base station, and measures signal quality of the CSI-RS sequence.

In the embodiment of the invention, the CSI-RS received by the UE is generated based on the identification information of the UE, so that the CSI-RS sent by the base station can be correctly received without acquiring the identification of the cell to carry out mobility measurement, thereby lightening the burden of the UE end and improving the communication quality of the UE.

A fourth aspect of the present invention provides a beam management method, including:

the first base station generates a CSI-RS sequence which is generated based on the identification information of the UE, and then the base station transmits the CSI-RS sequence to the UE for the UE to perform beam management.

Specifically, the method for generating the CSI-RS sequence and the method for configuring the resource for sending the CSI-RS sequence by the first base station based on the identification information of the UE are the same as the mobility measurement method provided in the first aspect, and are not described herein again.

In the embodiment of the invention, the CSI-RS for beam management is generated based on the identification information of the UE, so that when the UE receives the CSI-RS and performs beam management, the UE does not need to interact with a base station for sending the CSI-RS to acquire the cell identification, and can correctly receive the CSI-RS sent by the base station according to the identification information of the UE, thereby reducing the signaling overhead of the UE, lightening the burden of the UE and improving the communication quality of the UE.

In a fifth aspect, an embodiment of the present invention further provides a base station, which specifically implements a function corresponding to the mobility measurement method provided in the first aspect or a function corresponding to the beam management method provided in the fourth aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software programs by hardware. The hardware and software include one or more unit modules corresponding to the above functions, which may be software and/or hardware.

In one possible design, the base station includes:

the device comprises a generating unit, a receiving unit and a processing unit, wherein the generating unit is used for generating a channel state information reference signal (CSI-RS) sequence, the CSI-RS sequence is generated based on identification information of the UE, and the CSI-RS sequence is used for the UE to carry out mobility measurement or the CSI-RS sequence is used for the UE to carry out beam management;

and a transmitting unit, configured to transmit the CSI-RS sequence to the UE.

In one possible design, the base station includes:

a transceiver, a processor and a memory connected to each other;

the memory is used for storing program codes, and the processor calls the program codes in the memory to execute the following operations:

generating a CSI-RS sequence, wherein the CSI-RS sequence is generated based on the identification information of the UE and is used for the UE to carry out mobility measurement; and transmits the CSI-RS sequence to the UE through the transceiver.

In a fifth aspect, an embodiment of the present invention further provides a base station, which specifically implements the function of the CSI-RS resource allocation method provided in the second aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software programs by hardware. The hardware and software include one or more unit modules corresponding to the above functions, which may be software and/or hardware.

In one possible design, the base station includes:

the sending unit is used for sending the identification information of the UE to the first base station when the UE enters the coverage area of the first base station, and the identification information of the UE is used for the first base station to generate a CSI-RS sequence;

the receiving unit is used for receiving CSI-RS resource configuration information from the first base station, wherein the CSI-RS resource configuration information comprises CSI-RS time-frequency resources of a CSI-RS sequence sent to the UE by the first base station;

and the sending unit is further configured to send the CSI-RS resource configuration information to the UE, so that the UE receives the CSI-RS sequence sent by the first base station on the CSI-RS time-frequency resource.

In one possible design, the base station includes:

a transceiver, a processor and a memory connected to each other;

when the UE is determined to enter the coverage area of the first base station, the identification information of the UE is sent to the first base station through the transceiver, the identification information of the UE is used for the first base station to generate a CSI-RS sequence, and the CSI-RS sequence is generated based on the identification information of the UE; receiving CSI-RS resource configuration information from the first base station through the transceiver, wherein the CSI-RS resource configuration information comprises CSI-RS time-frequency resources of a CSI-RS sequence sent to the UE by the first base station; and then the CSI-RS resource configuration information is sent to the UE through the transceiver, so that the UE receives the CSI-RS sequence sent by the first base station on the CSI-RS time frequency resource.

In a sixth aspect, an embodiment of the present invention further provides a user equipment, which specifically implements a function corresponding to the mobility measurement method provided in the third aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software programs by hardware. The hardware and software include one or more unit modules corresponding to the above functions, which may be software and/or hardware.

In one possible design, the user equipment includes:

a receiving unit for receiving a channel state information reference signal, CSI-RS, sequence from a base station, the CSI-RS sequence being a sequence generated based on identification information of a UE;

and the measurement unit is used for measuring the signal quality of the CSI-RS sequence.

In one possible design, the user equipment includes:

a transceiver, a processor and a memory connected to each other;

receiving, by a transceiver, a channel state information reference signal, CSI-RS, sequence from a first base station, the CSI-RS sequence being a sequence generated based on identification information of a UE; thereafter, the signal quality of the CSI-RS sequence is measured.

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

In a seventh aspect, the present application 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 the embodiment of the invention, the CSI-RS is generated based on the identification information of the UE, so that when the UE uses the CSI-RS to perform mobility measurement or beam management and other functions, the identification of each cell (including the cell and the adjacent cell) does not need to be acquired, and the CSI-RS sent by the base station of each cell can be correctly received according to the identification information of the UE, thereby reducing the signaling overhead of the UE, lightening the burden of the UE and improving the communication quality of the UE.

Drawings

Fig. 1 is a schematic diagram of a cell handover procedure in an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a mapping of CSI-RS signals on time-frequency resources according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a UCNC network in an embodiment of the invention;

fig. 4 is a schematic diagram of information interaction in a CSI-RS transmission process in the embodiment of the present invention;

FIG. 5 is a diagram illustrating a process of receiving, by a UE, a CSI-RS transmitted by a base station of a neighboring cell according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a process of receiving, by a UE, CSI-RS transmitted by a base station of a local cell according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating a process of receiving CSI-RS sent by a neighboring cell and a base station of a local cell by a UE in an embodiment of the present invention;

fig. 8 is a schematic diagram of a functional module structure of a base station in an embodiment of the present invention;

fig. 9 is another schematic diagram of a functional module structure of a base station in the embodiment of the present invention;

fig. 10 is a schematic diagram of a functional module structure of a user equipment in an embodiment of the present invention;

fig. 11 is a schematic diagram of hardware structures of a base station and user equipment in the embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The technical solution in the embodiments of the present invention can be applied to various wireless communication systems such as a Code Division Multiple Access (CDMA) network, a Time Division Multiple Access (TDMA) network, a Frequency Division Multiple Access (FDMA) network, an Orthogonal FDMA (OFDMA) network, a single carrier FDMA (SC-FDMA) network, and the like. The terms "network" and "system" are often used interchangeably. A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, etc. UTRA includes wideband CDMA (W-CDMA) and other CDMA variants. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. TDMA networks may implement radio technologies such as global system for mobile communications (GSM). OFDMA networks may implement radio technologies such as evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-advanced (LTE-A) are new UMTS releases that use E-UTRA. The techniques described herein may be used for the above-mentioned wireless networks and radio technologies as well as other wireless networks and radio technologies.

The user equipment (i.e., terminal) referred to in this application may be a wireless terminal or a wired terminal. A wireless terminal may refer to a device that provides voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN). The device may also be a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), or the like. The User equipment in the embodiment of the present invention may also be referred to as a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User agent (User agent), and a User equipment (User Device).

A base station, as referred to herein, may refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a Base Transceiver Station (BTS) in a Global System for mobile Communication (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB) in a Wideband Code Division Multiple Access (W-CDMA), an evolved Node B (NodeB or eNB or e-NodeB) in a Long Term Evolution (LTE), or a next generation wireless Communication System, that is, a transmission-reception Point (TRP) in a 5G System, and the present application is not limited thereto.

The method in the embodiment of the invention can be applied to a communication scene of 5G user cooperation, and also can be applied to a mobility measurement scene in 5G, LTE or LTE-A, wherein the mobility measurement is mainly used for cell switching.

Cell switching is an important process of a wireless network, and plays a very key role in guaranteeing the wireless communication quality of UE. Fig. 1 shows a process schematic of cell handover in LTE. In a wireless network, a base station of each cell transmits a Reference signal, and a UE in a cell receives the Reference signal transmitted by the base station of the cell and Reference signals transmitted by base stations of neighboring cells, measures quality of the received Reference signals, such as Reference Signal Received Power (RSRP), and reports the received Reference signal quality information to the base station of the cell. The base station of the cell determines whether the UE is switched to another cell according to the information reported by the UE, for example, when the RSRP of the reference signal sent by the base station of the neighboring cell received by the UE is greater than the RSRP of the reference signal sent by the base station of the cell received by the UE, the base station may send a signaling to instruct the UE to switch to the neighboring cell and perform handover preparation and data migration of the UE with the base station of the neighboring cell, and the UE, after receiving the handover instruction, performs handover confirmation and initiates initial access with the base station of the neighboring cell, and after successfully accessing the base station of the neighboring cell, may start normal communication.

In the cell handover process, mobility measurement is an important part, that is, the UE needs to measure the quality of signals transmitted by neighboring cells and signals of the base station of the cell. In the LTE network, the UE may measure a Cell Reference Signal (CRS) transmitted by a base station to perform mobility measurement, and report the measurement result to the local Cell base station as a basis for Cell handover.

The CSI-RS may also be used for mobility measurements, e.g. for mobility measurements in LTE networks, but also in future wireless communication systems including 5G.

In an LTE network, CSI-RS can be transmitted on 32 antenna ports (antenna ports) at most, and the corresponding antenna port number is p-15, 16. Regarding antenna ports, the spatial dimension in LTE is measured by "layer" and implemented by using multi-antenna transmission and multi-antenna reception techniques, each layer corresponds to an effective data stream and is mapped to a logical antenna port, each antenna port corresponds to a time-frequency resource grid and has a corresponding reference signal, so that a receiving end performs channel estimation, coherent demodulation, and the like.

The eNB may periodically transmit CSI-RS signals with a period of 5 ms, 10 ms, 20 ms, 40 ms, and 80 ms, and CSI-RS signals transmitted on different antenna ports may occupy different time-frequency resources, fig. 2 shows a schematic diagram of a mapping relationship of CSI-RS on one physical resource block pair, where R is R₁₅ and R₁₇Representing the CSI-RS signals on antenna port 15 and antenna port 17, respectively.

The method for carrying out mobility measurement by using the CSI-RS in the embodiment of the invention can be suitable for an LTE network and can also be suitable for a future wireless communication system including 5G. The results of mobility measurements may be used as a basis for cell handover, for example: in LTE networks, mobility measurements may be used for Cell (Cell) handover; in 5G networks, mobility measurements may be used for handovers between TRPs in User Centric and Cell free (UCNC) network architectures.

The UCNC network architecture is an important feature of future wireless communication networks including 5G, and is characterized by emphasizing the concept of weakening cells with users as the center. A conventional wireless communication network (e.g., an LTE network) is centered on a cell, base stations of different cells serve UEs in respective cells, when a UE enters an adjacent cell from the cell in a moving process, cell handover may occur, a cell handover procedure is complex, involved signaling overhead is also large, a large time delay may be caused, and a user experience of the UE may be adversely affected.

In the UCNC network, the UE is used as a center, and in a large-scale moving process of the UE, even if the UE moves from one cell to another cell, the network side configures a corresponding base station to serve the UE, and the UE end cannot completely perceive a cell switching process. Each cell in the large range forms a super cell (super cell) in the UCNC network, and the UE cannot experience the cell switching when moving in the same super cell, thereby reducing the switching overhead of the UE end and improving the communication quality and user experience of the UE.

Fig. 3 shows a schematic diagram of the UCNC network, where cell 1, cell 2, cell 3 and cell 4 constitute a super cell, the UE is served by the base station in cell 1 at time t1, and as the UE moves, the UE is served by the base station in cell 4 at time t2, but the UE does not feel the handover of the cell itself.

In a conventional wireless communication Network (e.g., an LTE Network), a Cell Radio Network Temporary Identifier (C-RNTI) is used as unique identification information of a UE in a Cell in the same Cell. In the UCNC network, in the same super cell, a UE-specific identifier (UE dedicate ID) is used as unique identifier information of the UE in the super cell.

Although the cell handover procedures are not necessarily the same in LTE networks and future wireless communication systems including 5G, the procedure for making mobility measurements using CSI-RS may be the same.

The following describes a procedure of performing mobility measurement using CSI-RS in the embodiment of the present invention with reference to an information interaction flowchart in fig. 4.

401. A first base station generates a CSI-RS sequence;

when the UE uses the CSI-RS for mobility measurement, the UE needs to receive a CSI-RS sequence (CSI-RS for short) generated by the first base station from the first base station.

In the embodiment of the invention, the CSI-RS sequence generated by the first base station is a CSI-RS sequence based on the identification information of the UE and is related to the identification information of the UE.

The identity information of the UE may be a cell radio temporary identity (C-RNTI) of the UE, for example: in an LTE network, the identification information of the UE may be a C-RNTI allocated to the UE by a base station of each cell. And the base station can generate a CSI-RS sequence of the UE based on the C-RNTI of the UE, and the CSI-RS sequence is used for the UE to carry out mobility measurement.

The identity information of the UE may also be a UE-specific identity, such as: in the UCNC network, the identification information of the UE may be a dedicated identification of the UE in the super cell. And the base station can generate a CSI-RS sequence of the UE based on the exclusive identification of the UE, and the CSI-RS sequence is used for the UE to carry out mobility measurement.

Each cell base station can group the UEs in the cell and allocate corresponding UE group identities. The criteria for grouping the UEs may be to group the UEs by geographical location, traffic type, or other information of the UEs. Optionally, the identification information of the UE may also be a UE group identification of a UE group in which the UE is located, and the base station may generate a CSI-RS based on the UE group, where the CSI-RS is used for performing mobility measurement on each UE in the UE group.

In a possible manner, the specific manner for the first base station to generate the CSI-RS sequence may be: and generating a CSI-RS sequence based on the first sequence, wherein the first sequence is initialized by a first initial quantity which is a function of the parameter corresponding to the identification information of the UE. Alternatively, the first sequence may be a pseudo-random sequence, initialized with a first initial amount at the beginning of each OFDM symbol.

Specifically, the parameter corresponding to the UE identification information may be a decimal value corresponding to the UE identification information.

In a possible way, the definition of the CSI-RS sequence may be extended to the definition of the CSI-RS sequence in the LTE network standard (Release13), which is defined as follows:

wherein n_sIs the slot number in a radio frame, l is the number of OFDM symbols in a slot, c (i) is a pseudo-random sequence passing c at the beginning of each OFDM symbol_initInitialization is performed.

Optionally, the initial quantity c in the CSI-RS sequence generation process_initis a UE dependent parameter alpha_UEA function of, i.e.

c_init＝f(α_UE)

wherein the correlation parameter α_UEThe identification information of the UE may be a parameter corresponding to the identification information of the UE, and the identification information of the UE may be a C-RNTI of the UE, or a UE group identification of a UE group in which the UE is located, or an exclusive identification of the UE.

In a feasible manner, c_initThe function definition of (c) may be as follows:

in another possible way, c_initThe function definition of (c) can also be as follows:

wherein ,n′_sIs equal to n_sRelevant value, n 'in some cases'_sCan be equal to n_sIn some cases, n'_sCan be equal to

N_CPCyclic prefix (Cyclic) for sub-framePrefix, CP) type. If the type of CP is normal CP (normal CP), then N_CPA value of 1, if the type of CP is extended CP, then N_CPThe value is 0.

The parameter corresponding to the identifier information of the UE may be a parameter corresponding to a C-RNTI of the UE, or a parameter corresponding to an exclusive identifier of the UE, or a parameter corresponding to a UE group identifier of a UE group in which the UE is located.

Optionally, c_initMust not exceed c₀E.g. in LTE systems c₀＝2³¹-1. If it is notAnd other parameters are selected such that c_initPossibly exceeding c₀Then a modulo operation should be performed, i.e.

Or

Or ifIs greater than N₀At the same time will make c_initValue of (a) exceeds c₀Then can be directed toPerforming a mould-taking operation, i.e.

Or

If it is notAnd other parameters are selected such that c_initNot possible to exceed c₀Then the modulo operation need not be performed.

Optionally, when the identity information of the UE is a cell radio temporary identity (C-RNTI), the corresponding initial amount C_initThe following can be defined:

c_init＝2¹⁰·(7·(n′_s+1)+l+1)·(2·N_C-RNTI+1)+2·N_C-RNTI+N_CP；

or, c_init＝2¹⁰·(2·N_C-RNTI+1)+2·N_C-RNTI+N_CP

wherein N_C-RNTINamely the decimal value corresponding to the C-RNTI of the UE.

Optionally, when the identification information of the UE is an exclusive identifier of the UE, the corresponding initial amount c is determined_initThe definition is as follows:

or the like, or, alternatively,

wherein Namely, the decimal value corresponding to the exclusive identifier of the UE.

Optionally, when the identification information of the UE is the UE group identification of the UE group in which the UE is located, the corresponding initial quantity c_initThe definition is as follows:

or the like, or, alternatively,

and identifying a corresponding decimal value for the UE group of the UE group in which the UE is located.

It should be noted that the CSI-RS sequence generation method can be extended to the LTE network, and the initial amount c of the pseudo-random sequence c (i) is initialized in the above manner_init(ii) a In addition, the CSI-RS sequence may be generated in other manners, which is not limited herein.

402. The first base station sends the CSI-RS sequence to the UE;

and the first base station sends the CSI-RS sequence to the UE after generating the CSI-RS sequence based on the identification information of the UE. Specifically, when the CSI-RS sequence is transmitted, the CSI-RS sequence needs to be transmitted through the antenna port after the processes of modulation, coding, mapping, and the like. During transmission, the CSI-RS sequence is transmitted on time-frequency resources and/or code domain resources allocated by the first base station.

And the UE monitors and receives the CSI-RS sequence on the corresponding time frequency resource and/or code domain resource.

And after receiving the CSI-RS of the first base station, the UE measures the signal quality of the signal and reports the measurement result to the currently accessed base station as a basis for judging whether the UE performs cell switching or not.

It should be noted that, in the embodiment of the present invention, the CSI-RS sequence generated by the base station based on the identification information of the UE may be used not only for the mobility measurement described above, but also for beam management (beam management), or for other functions or other scenarios of a future wireless communication system including 5G. When the CSI-RS sequence is used for performing other functions such as beam management, the CSI-RS sequence is also generated and transmitted in steps 401 and 402.

When the CSI-RS sequence generated by the method in the embodiment of the invention is used for beam management, the UE can measure the signal strength of the beam based on the CSI-RS. Based on the measurement, the UE may perform beam selection and switching, specifically, may perform beam selection and switching between different beams of the same base station, or may perform beam selection and switching between beams of different base stations.

In addition, if the embodiment of the invention is used in the UCNC network, the UE can be further taken as the center, so that the UE and the base station are decoupled, and the burden of the UE end is simplified.

In addition, in the embodiment of the invention, the CSI-RS sequence generated by the base station is based on the CSI-RS of the UE, and the CSI-RS is sent to the UE only when the UE is in an activated state and enters the coverage area of the cell, so that the CSI-RS can be sent more flexibly according to the requirement, and the signaling cost is saved.

The UE in the embodiment shown in fig. 4 may be a UE served by a neighboring base station (second base station) of the first base station, or may be a UE served by the first base station.

These two scenarios in the embodiment of the present invention are described below with reference to fig. 5 and 6, respectively.

The UE is served by a neighboring base station (a second base station) of the first base station, and enters the coverage range of the first base station;

as shown in fig. 5, eNB1 is a first base station, the cell in which it is located is cell 1, eNB2 is a second base station, and the cell in which it is located is cell 2. The eNB2 is a base station providing service for the UE, the local cell of the UE is cell 2, the neighboring cell is cell 1, the eNB1 is a base station of the neighboring cell, and the UE enters the coverage of the eNB 1.

When the UE moves to the coverage of the neighbor cell base station eNB1, the UE receives the CSI-RS transmitted by the neighbor cell base station eNB1, which is generated by the eNB1 based on the UE's identification information.

Specifically, the process of the UE receiving the CSI-RS sequence based on the identification information of the UE from the neighboring cell base station eNB1 is as follows:

501. when the eNB2 detects that the UE moves to the coverage of the neighboring cell base station eNB1, the eNB2 transmits the identification information of the UE to the eNB1 (specifically, may transmit through an X2 interface);

502. the eNB1 generates a CSI-RS sequence based on the identification information of the UE;

503. the eNB1 configures CSI-RS resource configuration information for the UE and sends the CSI-RS resource configuration information to the eNB 2;

in order to reduce the system resource overhead of the CSI-RS and enable the UE to correctly receive the CSI-RS sequence transmitted by the eNB 1. Each cell base station may allocate a resource for sending the CSI-RS according to the user information reported by the neighboring cell base station and the user information of the cell, and specifically, the resource for sending the CSI-RS may be allocated through a higher layer signaling, such as an RRC signaling.

After receiving the UE identification information sent by the base station eNB2 of the local cell, the base station eNB1 of the neighboring cell of the UE configures corresponding CSI-RS time-frequency resources (and/or code domain resources) to send a CSI-RS sequence based on the UE, and sends CSI-RS resource configuration information to the base station eNB2 of the local cell.

504. After receiving the CSI-RS resource configuration information, the cell base station eNB2 further sends the CSI-RS resource configuration information to the UE through RRC signaling.

505. The neighbor cell base station eNB1 sends the generated CSI-RS sequence to the UE on the configured CSI-RS time frequency resource (and/or code domain resource) for the UE to perform mobility measurement or perform beam management and other functions.

506. The UE may listen to the CSI-RS time-frequency resource (or code domain resource) according to the received CSI-RS resource configuration information, so as to correctly receive the CSI-RS sequence sent by the neighboring cell base station eNB1, where the CSI-RS sequence is generated based on the identification information of the UE, and the UE performs functions such as mobility measurement or beam management through the CSI-RS sequence.

In the embodiment shown in fig. 5, when the UE moves to the coverage of the neighboring cell, the CSI-RS sent by the base station of the neighboring cell can be correctly received according to the identification information of the UE without acquiring the cell identifier of the neighboring cell, so as to perform functions such as mobility measurement or beam management. Therefore, signaling overhead of the UE end is reduced, burden of the UE end is relieved, and communication quality of the UE is improved.

Secondly, the UE is the UE served by the first base station

As shown in fig. 6, eNB3 (the first base station) serves a UE, and cell 3 is the own cell of the UE. The process of receiving the CSI-RS sequence based on the UE identification information from the cell base station eNB3 by the UE is as follows:

601. the eNB3 generates a CSI-RS sequence based on the identification information of the UE;

602. the eNB3 configures CSI-RS resource configuration information for the UE and sends the CSI-RS resource configuration information to the UE;

603. the eNB3 sends the generated CSI-RS sequence to the UE on the CSI-RS time-frequency resource (and/or code domain resource) configured in the CSI-RS resource configuration information.

604. The UE may listen to the CSI-RS time-frequency resource (or code domain resource) according to the received CSI-RS resource configuration information, so as to correctly receive the CSI-RS sequence sent by the eNB3, and perform functions such as mobility measurement or beam management through the CSI-RS sequence.

In the embodiment shown in fig. 6, the base station generates the CSI-RS sequence based on the identification information of the UE, and the UE can correctly receive the CSI-RS sent by the base station according to the identification information of the UE, so as to perform functions such as mobility measurement or beam management. The decoupling of the UE and the base station can be further realized, so that the burden of the UE end can be reduced.

It should be noted that, in practical application, for a certain base station, the base station may generate a CSI-RS based on the identification information of the UE for the UE served by the base station in the manner shown in fig. 6 in the embodiment of the present invention; the CSI-RS based on the cell identifier may also be generated by using a method in the prior art, which is not limited in the embodiment of the present invention.

For example: in the embodiment shown in fig. 5, when performing mobility measurement, the UE receives not only the CSI-RS sequence transmitted by the neighboring cell base station eNB1, but also the CSI-RS sequence transmitted by the local cell base station eNB 2. The CSI-RS sequence received by the UE from the eNB1 is generated based on the UE identification information, and the CSI-RS sequence received by the UE from the eNB2 may be generated based on the UE identification information or the cell identification.

Based on the method in the embodiment of the invention, if one UE is positioned in the coverage range of a plurality of cells, the CSI-RSs sent by the base stations of the plurality of cells are received at the same time, and the CSI-RSs are generated based on the identification information of the UE.

As shown in FIG. 7, the base station currently serving the UE is eNB4, and the UE has moved into the coverage of eNB5 and eNB 6. At this time, the eNB4 knows that the UE has moved into the coverage of the eNB5, and then sends the UE identification information to the eNB5, and the eNB5 generates a CSI-RS sequence for the UE based on the UE identification information and sends the CSI-RS sequence to the UE. Similarly, the eNB4 knows that the UE has moved into the coverage of the eNB6, and sends the UE identification information to the eNB6, and the eNB6 generates a CSI-RS sequence for the UE based on the UE identification information and sends the CSI-RS sequence to the UE. Also, the eNB4 itself generates a CSI-RS sequence for the UE based on the UE identification information, and transmits the CSI-RS sequence to the UE. Therefore, the UE receives CSI-RS sequences sent by the three base stations, but the UE does not need to acquire cell identifiers of the three base stations, and can receive the CSI-RSs sent by the three base stations by using identification information of the UE to perform functions such as mobility measurement or beam management, thereby reducing the burden of the UE.

It should be noted that, in the embodiment shown in fig. 7, the eNB5 and the eNB6 respectively need to generate CSI-RS resource configuration information for transmitting the CSI-RS sequence, and respectively transmit the CSI-RS resource configuration information to the UE through the eNB4, so that the UE can respectively receive the CSI-RS sequence on the corresponding CSI-RS time-frequency resource (and/or code domain resource). Please refer to the procedure of CSI-RS resource allocation in the embodiment shown in fig. 5.

The above is a description of the method in the embodiment of the present invention, and the following is a description of the base station and the user equipment in the embodiment of the present invention from the perspective of the functional module.

As shown in fig. 8, an embodiment of the present invention provides a base station, which has the functions of the first base station in the foregoing method embodiment, and the base station includes, in a functional module:

a generating unit 801, configured to generate a CSI-RS sequence, where the CSI-RS sequence is generated based on identification information of a UE, and the CSI-RS sequence is used for the UE to perform mobility measurement;

a sending unit 802, configured to send a CSI-RS sequence to the UE.

In some specific embodiments:

the generating unit 801 is specifically configured to generate a CSI-RS sequence based on a first sequence, where the first sequence is initialized by a first initial quantity, and the first initial quantity is a function of a parameter corresponding to the UE identification information.

In some specific embodiments, the UE identification information is one of the following identification information:

the cell radio temporary identity C-RNTI of the UE, the UE group identity of the UE group where the UE is located and the exclusive identity of the UE.

In some specific embodiments, the parameter corresponding to the UE identification information includes a decimal value corresponding to the UE identification information.

In some specific embodiments, the UE is a UE served by a second base station, the second base station comprising a base station neighboring the base station; the base station further comprises:

a receiving unit 803, configured to obtain, from the second base station, the identity information of the UE when the UE enters the coverage of the first base station.

In some specific embodiments, the base station further includes:

a resource configuration unit 804, configured to configure CSI-RS resource configuration information, where the CSI-RS resource configuration information includes a CSI-RS time-frequency resource for a first base station to send a CSI-RS sequence;

the sending unit 802 is further configured to send the CSI-RS resource configuration information to the second base station, and send the CSI-RS resource configuration information to the UE through the second base station;

the sending unit 802 is specifically configured to send a CSI-RS sequence on a CSI-RS time-frequency resource.

In some particular embodiments, the UE comprises a UE served by a first base station;

the resource configuration unit 801 is further configured to configure CSI-RS resource configuration information, where the CSI-RS resource configuration information includes a CSI-RS time-frequency resource for the first base station to send a CSI-RS sequence;

a sending unit 802, configured to send CSI-RS resource configuration information to the UE;

In some specific embodiments, the function of the first initial quantity used by the generation unit 801 to generate the CSI-RS sequence includes:

or the like, or, alternatively,

wherein ,c_initIs a first initial amount, n'_sIs the number of a slot in a radio frame or a value derived from the number of a slot in a radio frame, l is the number of an orthogonal frequency division multiplexing, OFDM, symbol in a slot,is a parameter corresponding to the C-RNTI of the UE or a parameter corresponding to the exclusive identification of the UE or a parameter corresponding to the UE group identification of the UE group in which the UE is positioned, N_CPIs the value corresponding to the type of the cyclic prefix of the subframe.

As shown in fig. 9, an embodiment of the present invention provides a base station, which has the functions of the second base station in the foregoing method embodiment, and the base station includes, in a functional module:

a sending unit 901, configured to send, when a UE enters a coverage area of a first base station, identification information of the UE to the first base station, where the identification information of the UE is used by the first base station to generate a CSI-RS sequence, and the CSI-RS sequence is a sequence generated based on the identification information of the UE;

a receiving unit 902, configured to receive CSI-RS resource configuration information from a first base station, where the CSI-RS resource configuration information includes a CSI-RS time-frequency resource for the first base station to send a CSI-RS sequence to a UE;

the sending unit 901 is further configured to send the CSI-RS resource configuration information to the UE, so that the UE receives, on a CSI-RS time-frequency resource, a CSI-RS sequence sent by the first base station.

As shown in fig. 10, an embodiment of the present invention provides a user equipment, which has the functions of the UE in the foregoing method embodiment, and the user equipment includes, in a functional module:

a receiving unit 1001 configured to receive a channel state information reference signal, CSI-RS, sequence from a base station, the CSI-RS sequence being a sequence generated based on identification information of a UE; a measuring unit 1002, configured to measure signal quality of the CSI-RS sequence.

For information interaction among the functional modules of the base station in the embodiment shown in fig. 8, information interaction among the functional modules of the base station in the embodiment shown in fig. 9, and information interaction among the functional modules of the user equipment in the embodiment shown in fig. 10, reference may be made to the above method embodiment (embodiments shown in fig. 4 to fig. 7), and details are not repeated here.

Fig. 11 shows a schematic diagram of hardware structures of a base station and a user equipment in an embodiment of the present invention, and the user equipment and the base station in a system in an implementation of the present invention have functions of the user equipment and the base station in the above method embodiment, respectively.

The user equipment is directly connected with the base station through radio frequency or baseband. The base station provides radio access for user equipment to a network and comprises one or more processors, one or more memories, one or more network interfaces, and one or more transceivers (each comprising a receiver Rx and a transmitter Tx), connected by a bus. One or more transceivers are connected to an antenna or antenna array. The one or more processors include computer program code. The network interface is connected to the core network via a link, e.g. a link to the core network, or to other base stations via a wired or wireless link. The processor executes a series of computer program code instructions in the memory to perform all or part of the steps performed by the base station in the above-described method embodiments (the embodiments shown in fig. 4-7).

The user equipment comprises one or more processors, one or more memories, one or more transceivers (each comprising a transmitter Tx and a receiver Rx), connected by a bus. One or more transceivers are connected to one or more antennas. The one or more memories include computer program code therein, and the processor executes a series of computer program code instruction operations in the memory to perform all or part of the steps performed by the user equipment in the above-described method embodiments (the embodiments shown in fig. 4-7).

It should be noted that, in the above embodiments, all or part of the embodiments may be implemented 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 invention 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 a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. 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.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings (if any) are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

In one possible way, c_initThe definition of the function can be as follows:

in another possible way, c_initThe definition of the function can be as follows:

in yet another possible way, c_initThe definition of the function can be as follows:

wherein ,n′_sIs equal to n_sRelevant value, n 'in some cases'_sCan be equal to n_sIn some cases, n'_sCan be equal to Indicating a rounding down.

Is the maximum value of the cell identity or the virtual cell identity. For example in the case of the LTE system,it may be 503, the maximum value of the cell identity. In the NR system, it is known that,may be the maximum value of the cell identity or virtual cell identity, e.g. 1008. It should be noted that it is preferable that,the values of (a) can be determined according to the actual needs of the communication system, and the above examples are exemplary and should not be construed as limiting the embodiments of the present invention.

N_CPA value corresponding to a type of a Cyclic Prefix (CP) of the subframe. If the type of CP is normal CP (normal CP), then N_CPA value of 1, if the type of CP is extended CP, then N_CPThe value is 0.

c_init＝2⁶·(7·(n′_s+1)+l+1)·(2·N_C-RNTI+1)+2·N_C-RNTI+N_CP(ii) a Or the like, or, alternatively,

or the like, or, alternatively,

wherein N_C-RNTINamely the decimal value corresponding to the C-RNTI of the UE.

or the like, or, alternatively,

In some specific embodiments, the function of the first initial quantity used by the generation unit 801 to generate the CSI-RS sequence further includes:

or the like, or, alternatively,

Claims

1. A mobility measurement method, characterized in that the method comprises:

a first base station generates a channel state information reference signal (CSI-RS) sequence, wherein the CSI-RS sequence is generated based on identification information of a User Equipment (UE), and the CSI-RS is used for the UE to carry out mobility measurement;

the first base station transmits the CSI-RS sequence to the UE.

2. The method of claim 1, wherein the first base station generating the CSI-RS sequence comprises:

the first base station generates the CSI-RS sequence based on a first sequence, the first sequence is initialized by a first initial quantity, and the first initial quantity is a function of a parameter corresponding to the identification information of the UE.

3. The method according to claim 1 or 2, wherein the UE identity information is one of the following identity information:

4. The method according to claim 2 or 3,

the parameter corresponding to the identification information of the UE comprises a decimal numerical value corresponding to the identification information of the UE.

5. The method according to any one of claims 1 to 4, characterized in that:

the UE is a UE served by a second base station, wherein the second base station comprises a base station adjacent to the first base station;

the method further comprises the following steps:

and when the UE enters the coverage range of the first base station, the first base station obtains the identification information of the UE from the second base station.

6. The method of claim 5, further comprising:

the first base station configures CSI-RS resource configuration information, wherein the CSI-RS resource configuration information comprises CSI-RS time-frequency resources of the CSI-RS sequence sent by the first base station;

the first base station sends the CSI-RS resource configuration information to the UE through the second base station;

the first base station transmitting the CSI-RS sequence to the UE includes:

and the first base station transmits the CSI-RS sequence on the CSI-RS time frequency resource.

7. The method according to any one of claims 1 to 4,

the UE comprises a UE served by the first base station;

the method further comprises the following steps:

the first base station sends the CSI-RS resource configuration information to the UE;

the first base station transmitting the CSI-RS sequence to the UE includes:

8. The method according to any one of claims 2 to 7, wherein the function of the first initial quantity comprises:

or the like, or, alternatively,

wherein, c is_initIs the first initial amount, the n_s' is a time slot number in a radio frame or a value obtained according to the time slot number in the radio frame, the l is a serial number of an Orthogonal Frequency Division Multiplexing (OFDM) symbol in a time slot, and the l is a sequence number of the OFDM symbol in the time slotThe parameter corresponding to the C-RNTI of the UE, the parameter corresponding to the exclusive identification of the UE or the parameter corresponding to the UE group identification of the UE group in which the UE is positioned, the N_CPIs the value corresponding to the type of the cyclic prefix of the subframe.

9. The method according to any one of claims 2 to 7, wherein the function of the first initial quantity comprises:

or the like, or, alternatively,

wherein ,indicating a rounding down. C is mentioned_initIs the first initial amount, the n_s' is a time slot number in a radio frame or a value obtained according to the time slot number in the radio frame, the l is a serial number of an Orthogonal Frequency Division Multiplexing (OFDM) symbol in a time slot, and the l is a sequence number of the OFDM symbol in the time slotThe parameter corresponding to the C-RNTI of the UE, the parameter corresponding to the exclusive identification of the UE or the parameter corresponding to the UE group identification of the UE group in which the UE is positioned, the N_CPA value corresponding to a type of a cyclic prefix of a subframe, saidIs the maximum value of the cell identity or the virtual cell identity.

10. A method for configuring CSI-RS resources, the method comprising:

when a second base station determines that UE enters the coverage area of a first base station, the second base station sends identification information of the UE to the first base station, and the identification information of the UE is used for the first base station to generate a CSI-RS sequence;

the second base station receives CSI-RS resource configuration information from the first base station, wherein the CSI-RS resource configuration information comprises CSI-RS time-frequency resources of the CSI-RS sequence sent by the first base station to the UE;

and the second base station sends the CSI-RS resource configuration information to the UE so that the UE receives the CSI-RS sequence sent by the first base station on the CSI-RS time frequency resource.

11. A mobility measurement method, characterized in that the method comprises:

the method comprises the steps that User Equipment (UE) receives a channel state information reference signal (CSI-RS) sequence from a base station, wherein the CSI-RS sequence is a sequence generated on the basis of identification information of the UE;

the UE measures a signal quality of the CSI-RS sequence.

12. A base station, characterized in that the base station comprises:

a generating unit, configured to generate a channel state information reference signal, CSI-RS, sequence, where the CSI-RS sequence is generated based on identification information of a UE, and the CSI-RS sequence is used for performing mobility measurement by the UE;

a sending unit, configured to send the CSI-RS sequence to the UE.

13. The base station of claim 12,

the generating unit is specifically configured to generate the CSI-RS sequence based on a first sequence, where the first sequence is initialized by a first initial quantity, and the first initial quantity is a function of a parameter corresponding to the identification information of the UE.

14. The base station according to claim 12 or 13, wherein the UE identity information is one of the following identity information:

15. The base station according to claim 13 or 14,

16. Base station according to any of the claims 12 to 15, characterized in that:

the UE is a UE served by a second base station, and the second base station comprises a base station adjacent to the base station;

the base station further comprises:

a receiving unit, configured to obtain, from the second base station, identification information of the UE when the UE enters a coverage area of the first base station.

17. The base station of claim 16, wherein the base station further comprises:

a resource configuration unit, configured to configure CSI-RS resource configuration information, where the CSI-RS resource configuration information includes a CSI-RS time-frequency resource for the first base station to send the CSI-RS sequence;

the sending unit is further configured to send the CSI-RS resource configuration information to the second base station, and send the CSI-RS resource configuration information to the UE through the second base station;

the sending unit is specifically configured to send the CSI-RS sequence on the CSI-RS time-frequency resource.

18. The base station according to any of claims 12 to 15,

the UE comprises a UE served by the first base station;

the base station further comprises:

the sending unit is further configured to send the CSI-RS resource configuration information to the UE;

19. The base station according to any of claims 13 to 18,

the function of the first initial quantity used by the generation unit in generating the CSI-RS sequence comprises:

or the like, or, alternatively,

20. The base station according to any of claims 13 to 18,

or the like, or, alternatively,

21. A base station, characterized in that the base station comprises:

a sending unit, configured to send, when a UE enters a coverage area of a first base station, identification information of the UE to the first base station, where the identification information of the UE is used by the first base station to generate a CSI-RS sequence;

a receiving unit, configured to receive CSI-RS resource configuration information from the first base station, where the CSI-RS resource configuration information includes a CSI-RS time-frequency resource for the first base station to send the CSI-RS sequence to the UE;

the sending unit is further configured to send the CSI-RS resource configuration information to the UE, so that the UE receives the CSI-RS sequence sent by the first base station on the CSI-RS time-frequency resource.

22. A user equipment, the user equipment comprising:

a receiving unit configured to receive a channel state information reference signal (CSI-RS) sequence from a base station, the CSI-RS sequence being a sequence generated based on identification information of the UE;

a measurement unit for measuring the signal quality of the CSI-RS sequence.