CN108811010B

CN108811010B - Mobility measurement method, CSI-RS resource allocation method and equipment

Info

Publication number: CN108811010B
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: 2023-10-03
Anticipated expiration: 2037-08-01
Also published as: CN108811010A

Abstract

The embodiment of the application discloses a mobility measurement method, a CSI-RS resource allocation method and equipment, which can reduce the burden of a UE end and improve the service quality of UE communication. The method of the embodiment of the application comprises the following steps: 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 sends the CSI-RS sequence to the UE for mobility measurement by the UE. In the embodiment of the application, the CSI-RS for mobility measurement is generated based on the identification information of the UE, so that the UE does not need to interact with the base station for generating the CSI-RS to acquire the cell identification when the UE uses the CSI-RS for mobility measurement, and the CSI-RS sent by the base station can be correctly received according to the identification information of the UE, thereby reducing the signaling overhead of the UE, relieving the burden of the UE and improving the communication quality of the 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 apparatus.

Background

Cell handover is an important process of a wireless network, and plays a very critical role in guaranteeing wireless communication quality of User Equipment (UE). In a wireless network, base stations of all cells transmit reference signals, and UE in the cells receives the reference signals transmitted by the base stations of the cells and the reference signals transmitted by the base stations of adjacent cells and performs mobility measurement: i.e. 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. And 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.

The channel state information reference signal (Channel State Information Reference Signal, CSI-RS) is an important reference signal in long term evolution (Long Term Evolution, LTE) networks. In a 5G network, mobility measurements may be made through CSI-RS.

In the prior art, since one key parameter in the generation process of the CSI-RS sequence is at the cell level, the CSI-RS sequences transmitted by different cells are associated with the own cell. If CSI-RS is used for mobility measurement in the cell handover process, signaling interaction with at least 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 analyzing the cell identification of the target cell from the synchronous signal of the target cell, and correctly receiving the CSI-RS sent by the base station of the target cell. Thereby increasing the burden of the UE in cell switching and reducing the service quality of UE communication.

Disclosure of Invention

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

An embodiment of the present invention provides a mobility measurement 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 sends the CSI-RS sequence to the UE for mobility measurement by the UE.

In the embodiment of the invention, the CSI-RS for mobility measurement is generated based on the identification information of the UE, so that the UE does not need to interact with the base station for transmitting the CSI-RS to acquire the cell identification when receiving the CSI-RS and performing mobility measurement, and the CSI-RS transmitted by the base station can be correctly received according to the identification information of the UE, thereby reducing the signaling overhead of the UE, relieving the burden of the UE and improving the communication quality of the UE.

Alternatively, the UE identification information may be one of the following UE identification information: the method comprises the steps of a cell radio temporary identifier C-RNTI of the UE, a UE group identifier of a UE group where the UE is located and a dedicated identifier of the UE.

Optionally, the manner in which the first base station generates 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, and the first initial quantity is a function of parameters corresponding to the identification information of the UE.

In a possible manner, the CSI-RS sequence may be generated by defining the CSI-RS sequence in the LTE network standard (Release 13) and passing the first sequence, i.e. the pseudo random sequence c (i), through the first initial quantity c _init Initializing, c _init Is a parameter alpha corresponding to the identification information of the UE _UE Is a function of (a).

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

Alternatively, a first initial amount c _init The function of (2) can be defined as:

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

wherein said c _init For the first initial amount, the n' _s For the time slot number in a radio frame or a value obtained from the time slot number in a radio frame, the l is the sequence number of an OFDM symbol in a time slot, theIs saidParameters corresponding to C-RNTI of UE or parameters corresponding to dedicated identifier of the UE or parameters corresponding to UE group identifier of UE group where the UE is located, the N is as follows _CP Is a value corresponding to the type of the cyclic prefix of the subframe.

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

wherein ,representing a rounding down. The c _init For the first initial amount, the n' _s For the time slot number in a radio frame or a value derived from the time slot number in a radio frame, said/is the sequence number of an OFDM symbol in a time slot, said>The N is the parameter corresponding to the C-RNTI of the UE or the parameter corresponding to the exclusive identifier of the UE or the parameter corresponding to the UE group identifier of the UE group where the UE is located _CP For a value corresponding to the type of sub-frame cyclic prefix, said +.>For 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 includes: when the UE enters the coverage area of the first base station, the first base station needs to obtain the identification information of the UE from the second base station 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 CSI-RS sequences transmitted by the base station. The first base station configures the CSI-RS resource configuration information to allocate the CSI-RS time-frequency resource for transmitting the CSI-RS sequence; and transmitting the CSI-RS resource configuration information to the second base station, and then transmitting the CSI-RS resource configuration information to the UE by the second base station. The first base station sends the CSI-RS sequence to the UE, and the CSI-RS sequence is actually sent on the allocated CSI-RS time-frequency resource. Thus, 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 area of the neighbor cell, the CSI-RS sent by the base station of the neighbor cell may be correctly received according to the own identification information without obtaining the cell identification of the neighbor cell, so as to perform mobility measurement. Therefore, the signaling overhead of the UE end is reduced, the burden of the UE end is lightened, and the 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. The first base station sends the CSI-RS sequence to the UE, wherein the CSI-RS sequence is actually sent on the CSI-RS time-frequency resource distributed by the CSI-RS resource configuration information.

In this scenario, the UE may correctly receive the CSI-RS transmitted by the base station of the cell according to its own identification information, so as to perform mobility measurement. 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 the time-frequency resource and/or the 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 the CSI-RS resource allocation information from the first base station, wherein the CSI-RS resource allocation information comprises CSI-RS time-frequency resources of a 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 on the CSI-RS time-frequency resource for mobility measurement.

Optionally, the identification information of the UE may be one of a cell radio temporary identifier C-RNTI of the UE, a UE group identifier of a UE group in which the UE is located, or a dedicated identifier of the UE.

In the embodiment of the invention, the first base station can obtain the identification information of the UE from the base station (namely the second base station) serving the UE currently, 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 serving the UE currently. Thus, the system resource overhead of the CSI-RS can be reduced. And the UE can correctly receive the CSI-RS sent by the base station (namely the first base station) of the adjacent cell according to the self identification information without obtaining the cell identification of the adjacent cell (namely the cell served by the first base station) so as to carry out mobility measurement. The burden of the UE end can be lightened, 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 the base station, and the UE 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 obtaining the identification of the cell to perform mobility measurement, thereby reducing the burden of the UE 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 sends the CSI-RS sequence to the UE for beam management by the UE.

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

In the embodiment of the invention, the CSI-RS for beam management is generated based on the identification information of the UE, so that the UE does not need to interact with the base station for transmitting the CSI-RS to acquire the cell identification when the UE receives the CSI-RS and performs beam management, and the CSI-RS transmitted by the base station can be correctly received only according to the identification information of the UE, thereby reducing the signaling overhead of the UE, relieving 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 may be implemented by hardware, or may be implemented by hardware executing a corresponding software program. The hardware and software include one or more unit modules corresponding to the above functions, and the unit modules may be software and/or hardware.

In one possible design, the base station includes:

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

and the sending unit is used for sending 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 a sequence generated based on the identification information of the UE, and the CSI-RS sequence is used for mobility measurement of the UE; and transmitting 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 a function corresponding to the CSI-RS resource allocation method provided in the second aspect. The functions may be implemented by hardware, or may be implemented by hardware executing a corresponding software program. The hardware and software include one or more unit modules corresponding to the above functions, and the unit modules may be software and/or hardware.

In one possible design, the base station includes:

the transmitting unit is used for transmitting 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;

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

and the sending unit is also used for sending 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 determining that the UE enters the coverage area of the first base station, transmitting identification information of the UE to the first base station through a transceiver, wherein 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 a sequence generated based on the identification information of the UE; receiving CSI-RS resource configuration information from a first base station through a transceiver, wherein the CSI-RS resource configuration information comprises CSI-RS time-frequency resources of a CSI-RS sequence sent by the first base station to UE; and transmitting the CSI-RS resource configuration information to the UE through the transceiver so that the UE receives the CSI-RS sequence transmitted by the first base station on the CSI-RS time-frequency resource.

In a sixth aspect, an embodiment of the present application further provides a user equipment, which specifically implements a function corresponding to the mobility measurement method provided in the third aspect. The functions may be implemented by hardware, or may be implemented by hardware executing a corresponding software program. The hardware and software include one or more unit modules corresponding to the above functions, and the unit modules 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 measuring 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, the CSI-RS sequence being a sequence generated based on identification information of the UE; thereafter, signal quality of the CSI-RS sequence is measured.

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

In a seventh aspect, the 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 application, the CSI-RS is generated based on the identification information of the UE, so that the UE does not need to acquire the identifications of all cells (including the cell and the neighbor cells) when the UE uses the CSI-RS to perform mobility measurement or beam management and other functions, 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, relieving 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 application;

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

fig. 3 is a schematic diagram of a UCNC network in an embodiment of the present application;

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

fig. 5 is a schematic diagram of a process of receiving CSI-RS sent by a base station of a neighboring cell by a UE in an embodiment of the present application;

fig. 6 is a schematic diagram of a process of receiving CSI-RS sent by a base station of a cell by a UE in an embodiment of the present application;

Fig. 7 is a schematic diagram of a process of receiving CSI-RS sent by a base station of a neighboring cell and a base station of a 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 according to an embodiment of the present invention;

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

fig. 10 is a schematic diagram of a functional module structure of a ue according to an embodiment of the present invention;

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

Detailed Description

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

The technical scheme in the embodiment of the 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, and the like. 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), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash-OFDM, and the like. UTRA and E-UTRA are parts of 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 wireless networks and radio technologies mentioned above and other wireless networks and radio technologies.

The user equipment (i.e., terminal) involved in the present application may be a wireless terminal or a wired terminal. A wireless terminal may be a device that provides voice and/or data connectivity to a user, a handheld device with wireless connectivity, or other processing device connected to a wireless modem. The wireless terminal may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), which may be mobile terminals such as mobile phones (or "cellular" phones) and computers with mobile terminals, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices. But also personal communication services (Personal Communication Service, PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDA) and the like. The User equipment in the embodiments of the present application may also be referred to as a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile Station), 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 in accordance with the present application 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 inter-convert the received air frames with 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 attribute management for the air interface. For example, the present application is not limited to a base station (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile Communication, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a base station (NodeB) in wideband code division multiple access (Wideband Code Division Multiple Access, W-CDMA), an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in long term evolution (Long Term Evolution, LTE), and a next generation wireless communication system, i.e., a Transmit-Receive Point (TRP) in a 5G system.

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

Cell switching is an important process of a wireless network, and plays a very critical role in guaranteeing the wireless communication quality of UE. Fig. 1 shows a schematic procedure of cell handover in LTE. In a wireless network, base stations of each cell transmit reference signals, UEs in the cell receive the reference signals transmitted by the base station of the cell and the reference signals transmitted by the base stations of the adjacent cells, measure the quality of the received reference signals, such as reference signal received power (Reference Signal Received Power, RSRP), and report 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 other cells according to the information reported by the UE, for example, when the RSRP of the reference signal sent by the base station of the neighbor cell and received by the UE is larger than the RSRP of the reference signal sent by the base station of the cell, the base station can send a signaling to instruct the UE to switch to the neighbor cell and perform switching preparation with the base station of the neighbor cell and data migration of the UE, and the UE can perform switching confirmation with the base station of the neighbor cell and initiate initial access after receiving a switching instruction, and can start normal communication after successfully accessing the base station of the neighbor cell.

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

The channel state information reference signal CSI-RS may also be used for mobility measurements, for example in LTE networks, as well as in future wireless communication systems including 5G.

In an LTE network, CSI-RS can transmit on a maximum of 32 antenna ports (antenna ports), corresponding to an antenna port number p=15, 16, 46. Regarding antenna ports, the spatial dimension in LTE is measured in "layers" and implemented using multi-antenna transmission and multi-antenna reception techniques, where each layer corresponds to an active data stream and is mapped to a logical antenna port, and each antenna port corresponds to a time-frequency resource grid and has a corresponding reference signal for channel estimation and coherent demodulation at the receiving end.

The eNB may periodically transmit CSI-RS signals, where the period may be 5 ms, 10 ms, 20 ms, 40 ms, and 80 ms, and CSI-RS transmitted on different antenna ports may occupy different time-frequency resources, and fig. 2 shows a schematic diagram of mapping of CSI-RS on a physical resource block pair, where R ₁₅ and R₁₇ Representing CSI-RS signals on antenna port 15 and antenna port 17, respectively.

The method for mobility measurement by using the CSI-RS in the embodiment of the invention can be applied to an LTE network and also can be applied to a future wireless communication system including 5G. The result of the mobility measurement 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 user centric and cell-free (User Centric No Cell, UCNC) network architecture handovers between TRPs.

Among them, UCNC network architecture is an important feature of future wireless communication networks including 5G, and is characterized by emphasizing a concept of weakening cells centering on users. The conventional wireless communication network (for example, LTE network) is centered on a cell, the base stations of different cells serve UEs in respective cells, and the UEs enter from the cell into a neighboring cell in the moving process, so that the cell switching process is complex, the signaling overhead involved is relatively large, a relatively large time delay is caused, and a certain negative effect is caused to the user experience of the UEs.

In UCNC network, the UE is centered, and in the process of moving in a large range, the network side configures a corresponding base station to serve the UE even if the UE moves from one cell to another cell, so that the UE end cannot completely perceive the handover process of the cell. Each cell in the large range forms a super cell (super cell) in the UCNC network, and the UE can not feel the switching of the cells when moving in the same super cell, thereby reducing the switching overhead of the UE end and improving the communication quality and the user experience of the UE.

Fig. 3 shows a schematic diagram of a UCNC network, where cell 1, cell 2, cell 3 and cell 4 constitute a super-cell, where the UE is served by the base station in cell 1 at time t1, and the UE is served by the base station in cell 4 at time t2 with the movement of the UE, 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 temporary identity (Cell Radio Network Temporary Identifier, C-RNTI) is used in the same cell as unique identity information of a UE in the cell. In the UCNC network, a UE-specific identifier (UE identifier ID) is used as unique identifier information of the UE in the super cell in the same super cell.

Although the cell handover procedure is not necessarily the same in the LTE network and the future wireless communication system including 5G, the procedure for mobility measurement using CSI-RS may be the same.

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

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

when the UE uses CSI-RS for mobility measurement, it 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 the CSI-RS sequence based on the identification information of the UE and is related to the identification information of the UE.

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

The identification information of the UE may also be a specific identification of the UE, for example: 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, wherein the CSI-RS sequence is used for mobility measurement of the UE.

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

In one possible manner, the specific manner in which the first base station generates 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, and the first initial quantity is a function of parameters corresponding to the identification information of the UE. Alternatively, the first sequence may be a pseudo-random sequence, the first sequence being initialized by a first initial amount at the beginning of each OFDM symbol.

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

In a possible manner, the definition of the CSI-RS sequence may be extended to the definition of the CSI-RS sequence in the LTE network standard (Release 13), as follows:

wherein n_s Is a slot number in a radio frame, l is a number of an OFDM symbol in a slot, c (i) is a pseudo-random sequence passing through c at the beginning of each OFDM symbol _init Initialization is performed.

Alternatively, the initial quantity c in the CSI-RS sequence generation process _init Is the relevant parameter alpha of the UE _UE Is a function of (a), i.e

c _init ＝f(α _UE )

Wherein the related parameter alpha _UE The parameter corresponding to the identification information of the UE can be the C-RNTI of the UE, or the UE group identification of the UE group where the UE is located, or the exclusive identification of the UE.

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

in another possible way c _init The function definition of (c) may also be as follows:

wherein ,n′_s Is equal to n _s The value of the correlation, n 'in some cases' _s Can be equal to n _s In some cases, n' _s Can be equal to

N _CP Is a value corresponding to the type of the Cyclic Prefix (CP) of the subframe. If the type of CP is normal CP, N _CP With a value of 1, if the CP type is extension CP (extended CP), then N _CP The value is 0.

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

Alternatively, c _init The value of (c) cannot exceed c ₀ For example c in LTE system ₀ ＝2 ³¹ -1. If it isThe other parameters are chosen such that c _init Possibly exceeding c ₀ Then a modulus-taking operation should be performed, i.e

Or (b)

Or ifThe value of (2) is greater than N ₀ Will cause c _init The value of (2) exceeds c ₀ Then can be directed to->Performing mould-taking operations, i.e.

Or (b)

If it isThe other parameters are chosen such that c _init Without possibly exceeding c ₀ Then it is unnecessary to take the formAnd (3) operating.

Optionally, when the UE identification information is a cell radio temporary identity (C-RNTI), a corresponding initial quantity C _init The following can be defined:

c _init ＝2 ¹⁰ ·(7·(n′ _s +1)+l+1)·(2·N _C-RNTI +1)+2·N _C-RNTI +N _CP ；

or, c _init ＝2 ¹⁰ ·(2·N _C-RNTI +1)+2·N _C-RNTI +N _CP

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

Optionally, when the identification information of the UE is the dedicated identification of the UE, a corresponding initial amount c _init The definition is as follows:

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

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

Optionally, when the UE identification information is a UE group identification of a UE group in which the UE is located, a corresponding initial amount c _init The definition is as follows:

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

decimal number corresponding to UE group identification of UE group where UE is locatedValues.

It should be noted that, the generation manner of the CSI-RS sequence may be extended to the manner in the LTE network, by initializing the initial amount c of the pseudo random sequence c (i) in the above manner _init The method comprises the steps of carrying out a first treatment on the surface of the In addition, the CSI-RS sequence may be generated in other manners, which are not limited herein.

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

And after the first base station generates the CSI-RS sequence based on the identification information of the UE, the first base station sends the CSI-RS sequence to the UE. Specifically, when the CSI-RS sequence is transmitted, it is required to perform processes such as modulation, coding, mapping, and the like, and then transmit the CSI-RS sequence through an antenna port. And in the transmitting process, the method specifically sends the CSI-RS sequence on time-frequency resources and/or code domain resources allocated to the CSI-RS sequence by the first base station.

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

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 the basis for judging whether the UE performs cell switching by the currently accessed base station.

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 mobility measurement as described above, but also for beam management (beam management), or for other functions or other scenarios of future wireless communication systems including 5G. When used for other functions such as beam management, CSI-RS sequences are generated and transmitted as well through steps 401 and 402 described above.

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 intensity of the beam based on the CSI-RS. Based on the measurement, the UE may perform beam selection and handover, specifically, may perform beam selection and handover between different beams of the same base station, or may perform beam selection and handover between beams of different base stations.

In the embodiment of the invention, the CSI-RS is generated based on the identification information of the UE, so that the UE does not need to acquire the identifications of all cells (including the cell and the neighbor cells) when the UE uses the CSI-RS to perform mobility measurement or beam management and other functions, 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, relieving the burden of the UE and improving the communication quality of the UE.

In addition, if the embodiment of the invention is used in the UCNC network, the UE can be further used as a center, so that the decoupling of the UE and the base station can be realized, and the burden of the UE end can be 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 as required more flexibly, and the signaling overhead 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 embodiments of the present invention are described below in conjunction with fig. 5 and 6, respectively.

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

As shown in fig. 5, eNB1 is a first base station, a cell where eNB2 is a second base station, and a cell where eNB2 is a cell 2. The eNB2 is a base station for providing service for the UE, the cell of the UE is cell 2, the neighbor cell is cell 1, the eNB1 is the base station of the neighbor cell, and the UE enters the coverage area of the eNB 1.

When the UE moves to the coverage area of the neighboring cell base station eNB1, the UE receives CSI-RS transmitted by the neighboring cell base station eNB1, and the CSI-RS are generated by the eNB1 based on the identification information of the UE.

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

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

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

503. eNB1 configures CSI-RS resource configuration information for UE and sends the CSI-RS resource configuration information to eNB2;

in order to reduce the system resource overhead of the CSI-RS and enable the UE to correctly receive the CSI-RS sequence sent by the eNB 1. The base station of each cell allocates the resource for transmitting CSI-RS according to the user information reported by the base station of the neighboring cell and the user information of the cell, specifically, the resource for transmitting CSI-RS may be allocated by a higher layer signaling, such as RRC signaling.

After receiving the UE identification information sent by the base station eNB2 of the 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 CSI-RS sequences based on the UE, and sends CSI-RS resource configuration information to the base station eNB2 of the 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 neighboring cell base station eNB1 sends the generated CSI-RS sequence to the UE on configured CSI-RS time-frequency resources (and/or code domain resources) so as to enable the UE to perform mobility measurement or beam management and other functions.

506. The UE can listen on 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 area of the neighboring cell, the CSI-RS sent by the base station of the neighboring cell can be correctly received according to the own identification information without obtaining the cell identification of the neighboring cell, so as to perform functions such as mobility measurement or beam management. Therefore, the signaling overhead of the UE end is reduced, the burden of the UE end is lightened, and the communication quality of the UE is improved.

2. The UE is a UE served by the first base station

As shown in fig. 6, eNB3 (first base station) serves a UE, and cell 3 is the own cell of the UE. The UE receives the CSI-RS sequence based on the UE identification information from the own cell base station eNB3 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 transmits the generated CSI-RS sequence to the UE on CSI-RS time-frequency resources (and/or code domain resources) configured in the CSI-RS resource configuration information.

604. The UE can 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 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. 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 base station, the base station may generate CSI-RS based on identification information of the UE by using the manner shown in fig. 6 of the embodiment of the present invention for the UE served by the base station; the CSI-RS based on the cell identifier may also be generated in a manner in the prior art, which is not limited by the embodiment of the present invention.

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

Based on the method in the embodiment of the invention, if one UE is located in the coverage area of a plurality of cells, the CSI-RS sent by the base stations of the cells can be received at the same time, and the CSI-RS is 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 moves into coverage of eNB5 and eNB 6. At this time, the eNB4 knows that the UE has moved into the coverage area of the eNB5, and then sends the identification information of the UE to the eNB5, and the eNB5 generates a CSI-RS sequence for the UE based on the identification information of the UE and sends the CSI-RS sequence to the UE. Similarly, when the eNB4 knows that the UE has moved into the coverage area of the eNB6, the eNB6 transmits the identification information of the UE to the eNB6, and the eNB6 generates a CSI-RS sequence for the UE based on the identification information of the UE and transmits the CSI-RS sequence to the UE. The eNB4 itself also generates a CSI-RS sequence for the UE based on the identification information of the UE, 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 identities of the three base stations respectively, and can receive CSI-RS sent by the three base stations only by using own identity information, so as to perform functions such as mobility measurement or beam management, thereby reducing the burden of the UE end.

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

The above is an introduction to the method in the embodiment of the present invention, and the following description is given to 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 above method embodiment, where the base station includes, in functional modules:

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

a transmitting unit 802, configured to transmit the 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 amount, and the first initial amount is a function of parameters corresponding to the identification information of the UE.

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

the method comprises the steps of a cell radio temporary identifier C-RNTI of the UE, a UE group identifier of a UE group where the UE is located and a dedicated identifier of the UE.

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

In some specific embodiments, the UE is a UE served by a second base station, the second base station comprising a base station adjacent to the base station; the base station further includes:

and a receiving unit 803 for obtaining the identification information of the UE from the second base station when the UE enters the coverage of the first base station.

In some specific embodiments, the base station further comprises:

a resource allocation unit 804, configured to allocate CSI-RS resource allocation information, where the CSI-RS resource allocation information includes CSI-RS time-frequency resources of the CSI-RS sequence sent by the first base station;

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

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

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

The resource allocation unit 801 is further configured to allocate CSI-RS resource allocation information, where the CSI-RS resource allocation information includes CSI-RS time-frequency resources of the CSI-RS sequence sent by the first base station;

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 generating unit 801 when generating the CSI-RS sequence comprises:

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

wherein ,c_init For a first initial amount, n' _s For the slot number in a radio frame or a value derived from the slot number in a radio frame, i is the sequence number of an orthogonal frequency division multiplexing OFDM symbol in a slot,n is the parameter corresponding to the C-RNTI of the UE or the parameter corresponding to the exclusive identifier of the UE or the parameter corresponding to the UE group identifier of the UE group where the UE is located _CP Is a 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 above embodiment of the method, where the functional modules of the base station include:

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 CSI-RS time-frequency resources of a CSI-RS sequence that the first base station sends to a UE;

the sending unit 901 is further configured to send 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 UE having functions of the UE in the foregoing method embodiment, where the UE includes, in function modules:

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

The information interaction between the functional modules of the base station in the embodiment shown in fig. 8, the information interaction between the functional modules of the base station in the embodiment shown in fig. 9, and the information interaction between the functional modules of the user equipment in the embodiment shown in fig. 10 can be referred to the above method embodiments (embodiments shown in fig. 4 to 7), and will not be repeated here.

The hardware structure diagrams of the base station and the user equipment in the embodiment of the present invention are shown in fig. 11, where the user equipment and the base station in the system in the embodiment of the present invention have the functions of the user equipment and the base station in the embodiment of the method.

The user equipment is directly connected with the base station through radio frequency or through baseband. The base station provides wireless access for the user equipment to the network, including one or more processors, one or more memories, one or more network interfaces, and one or more transceivers (each transceiver including 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. with the core network, or to other base stations via a wired or wireless link. 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 base station in the method embodiments described above (the embodiments shown in fig. 4-7).

The user equipment comprises one or more processors, one or more memories, one or more transceivers (each transceiver 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 that, when executed by a processor, performs a series of computer program code instruction operations in the memories to perform all or a portion of the steps performed by the user device in the method embodiments described above (the embodiments shown in fig. 4-7).

It should be noted that, in the above embodiments, the implementation may be implemented in whole or in part 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, produces a flow or function in accordance with embodiments of the present invention, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

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

The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise 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 systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

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

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

In one possible way, c _init The definition of the function may be as follows:

in another possible way c _init The definition of the function may be as follows:

in a further possible way c _init Definition of the function may beThe following is shown:

wherein ,n′_s Is equal to n _s The value of the correlation, n 'in some cases' _s Can be equal to n _s In some cases, n' _s Can be equal to Representing a rounding down.

For the maximum value of the cell identity or the virtual cell identity. For example, in LTE systems,>may be 503, i.e. the maximum value of the cell identity. In NR system, & gt>The maximum value of the cell identity or virtual cell identity may be, for example 1008. It should be noted that- >The values of (2) may be determined according to the actual needs of the communication system, and the foregoing examples are exemplary and should not be construed as limiting the embodiments of the present invention.

c _init ＝2 ⁶ ·(7·(n′ _s +1)+l+1)·(2·N _C-RNTI +1)+2·N _C-RNTI +N _CP the method comprises the steps of carrying out a first treatment on the surface of the Or alternatively, the first and second heat exchangers may be,

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

Optionally, when the UE identification information is a UE group of the UE group where the UE is locatedWhen identifying, corresponding initial quantity c _init The definition is as follows:

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

and the decimal value corresponding to the UE group identifier of the UE group where the UE is located.

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

wherein ,c_init For a first initial amount, n' _s For the slot number in a radio frame or a value derived from the slot number in a radio frame, i is the sequence number of an orthogonal frequency division multiplexing OFDM symbol in a slot,n is the parameter corresponding to the C-RNTI of the UE or the parameter corresponding to the exclusive identifier of the UE or the parameter corresponding to the UE group identifier of the UE group where the UE is located _CP For sub-frame trackingThe value corresponding to the type of ring prefix.

In some specific embodiments, the function of the first initial quantity used when generating the CSI-RS sequence by the generating unit 801 further comprises:

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

wherein ,representing a rounding down. The c _init For the first initial amount, the n' _s For the time slot number in a radio frame or a value derived from the time slot number in a radio frame, said/is the sequence number of an OFDM symbol in a time slot, said>The N is the parameter corresponding to the C-RNTI of the UE or the parameter corresponding to the exclusive identifier of the UE or the parameter corresponding to the UE group identifier of the UE group where the UE is located _CP For a value corresponding to the type of sub-frame cyclic prefix, said +. >For the maximum value of the cell identity or the virtual cell identity. />

Claims

1. A mobility measurement method, the method comprising:

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

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

when the UE is a UE served by a second base station, the second base station including a base station adjacent to the first base station, the method further includes: when the second base station detects that the UE enters the coverage area of the first base station, the first base station receives the identification information of the UE sent by the second base station; 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 transmitted by the first base station; and the first base station sends the CSI-RS resource configuration information to the UE through the second base station.

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 initialized by a first initial amount that is a function of parameters corresponding to the identification information of the UE.

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

4. The method of claim 2, wherein the step of determining the position of the substrate comprises,

the parameters corresponding to the identification information of the UE comprise decimal values corresponding to the identification information of the UE.

5. The method of claim 1, wherein the first base station transmitting CSI-RS sequences to the UE comprises: and the first base station transmits the CSI-RS sequence on the CSI-RS time-frequency resource.

6. The method according to any one of claim 1 to 4, wherein,

when the UE includes a UE served by the first base station;

the method further comprises the steps of:

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 transmitted by the first base station;

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

the first base station transmitting a 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 2 to 4, wherein the function of the first initial quantity comprises:

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

wherein said c _init For the first initial amount, the n _s ' is a time slot number in one radio frame or a value obtained according to the time slot number in one radio frame, l is a sequence number of an OFDM symbol in one time slot, theThe N is the parameter corresponding to the C-RNTI of the UE or the parameter corresponding to the exclusive identifier of the UE or the parameter corresponding to the UE group identifier of the UE group where the UE is located _CP Is a value corresponding to the type of the cyclic prefix of the subframe.

8. The method according to any one of claims 2 to 4, wherein the function of the first initial quantity comprises:

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

wherein ,representing a rounding down, said c _init For the first initial amount, the n _s ' is the time slot number in a radio frame or a value derived from the time slot number in a radio frame, said l is the sequence number of an OFDM symbol in a time slot, said ≡>The N is the parameter corresponding to the C-RNTI of the UE or the parameter corresponding to the exclusive identifier of the UE or the parameter corresponding to the UE group identifier of the UE group where the UE is located _CP A value corresponding to the type of the cyclic prefix of the subframe, theFor the maximum value of the cell identity or the virtual cell identity.

9. A method for configuring CSI-RS resources of a channel state information reference signal, the method comprising:

when a second base station determines that a 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.

10. A mobility measurement method, the method comprising:

user Equipment (UE) receives a channel state information reference signal (CSI-RS) sequence from a first base station, wherein the CSI-RS sequence is a sequence generated based on identification information of the UE;

the UE measures the signal quality of the CSI-RS sequence;

When the UE is a UE served by a second base station, the second base station including a base station adjacent to the first base station, the method further includes: when the coverage area of the UE entering the first base station is detected by the second base station, the UE receives CSI-RS resource configuration information sent by the second base station, wherein the CSI-RS resource configuration information is configured after the first base station receives the identification information of the UE sent by the second base station, and the CSI-RS resource configuration information comprises CSI-RS time-frequency resources of the CSI-RS sequence sent by the first base station.

11. A first base station, the first base station comprising:

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

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

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

the first base station further includes:

a receiving unit, configured to receive, when the second base station detects that the UE enters a coverage area of the first base station, identification information of the UE sent by the second base station;

A resource allocation unit, configured to allocate CSI-RS resource allocation information, where the CSI-RS resource allocation information includes CSI-RS time-frequency resources of the CSI-RS sequence sent by the first base station;

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.

12. The first base station of claim 11, wherein,

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 amount, and the first initial amount is a function of a parameter corresponding to the identification information of the UE.

13. The first base station of claim 12, wherein the UE identification information is one of the following identification information:

14. The first base station of claim 12, wherein,

15. The first base station of claim 11, wherein the first base station further comprises:

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

16. The first base station according to any of the claims 11 to 14, characterized in that,

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

the first base station further includes:

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

17. The first base station according to any of the claims 12 to 14, characterized in that,

the function of the first initial quantity used by the generating unit when generating the CSI-RS sequence includes:

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

18. The first base station according to any of the claims 12 to 14, characterized in that,

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

19. A base station, the base station comprising:

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 CSI-RS time-frequency resources of the CSI-RS sequence that the first base station sends 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.

20. A user equipment, UE, characterized in that the user equipment comprises:

a receiving unit, configured to receive 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 the user equipment;

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

the receiving unit is further configured to receive CSI-RS resource configuration information sent by a second base station when the UE is served by the second base station, where the second base station includes a base station adjacent to the first base station, and the coverage area of the UE entering the first base station is detected by the second base station, where the CSI-RS resource configuration information is configured by the first base station after receiving identification information of the UE sent by the second base station, and the CSI-RS resource configuration information includes CSI-RS time-frequency resources of the CSI-RS sequence sent by the first base station.