CN103384386B

CN103384386B - uplink communication method and terminal

Info

Publication number: CN103384386B
Application number: CN201210137242.6A
Authority: CN
Inventors: 张亮亮; 柴丽; 蔺波
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-05-04
Filing date: 2012-05-04
Publication date: 2017-01-25
Anticipated expiration: 2032-05-04
Also published as: WO2013163900A1; CN103384386A

Abstract

The invention discloses an uplink communication method and terminal. According to the method, the terminal determines the uplink transmission point of the terminal according to configuration information sent by a base station, and then uplink communication is carried out between the terminal and the uplink transmission point of the terminal. When the uplink communication method and terminal are applied to a CoMP communication system, due to the fact that the terminal can determine the uplink transmission point of the terminal from multiple stations in the CoMP communication system according to the configuration information sent by the base station instead of directly taking the downlink access point of the terminal as the uplink access point, uplink path loss which is closer to the reality can be obtained by the terminal through measurement according to the uplink transmission point, and then the terminal can select an appropriate preamble code for accurate uplink power control so that uplink communication quality can be improved.

Description

Uplink communication method and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an uplink communication method and a terminal.

Background

A CoMP (Coordinated Multi-Point) technology is introduced in LTE (Long Term Evolution) to improve a data transmission rate. In a CoMP communication system using CoMP technology, the CoMP communication system includes a plurality of interconnected access points serving a terminal, also called transmission points or nodes or stations of the terminal, where the access points are usually base stations, and the base stations may be macro cell base stations or micro cell base stations, the macro cell base stations are also called macro base stations, and the micro cell base stations are also called micro base stations, and their forms include but are not limited to pico, femto, and home base stations, and other low power nodes. The access point providing downlink service for the terminal is a downlink point, and the access point providing uplink service for the terminal is an uplink point. In the prior art, a terminal assumes that a downlink path loss is the same as an uplink path loss, that is, an uplink point and a downlink point of the terminal are the same point, so the terminal defaults to select a preamble and control uplink power by using the measured downlink path loss as the uplink path loss.

With the development of wireless technology, an uplink point and a downlink point of a terminal may not be the same access point, and if the terminal directly uses one downlink point of the terminal as its uplink point, an error may occur. In this case, when the terminal may directly use the measured downlink path loss as the uplink path loss, the difference between the uplink path loss and the actual uplink path loss of the terminal is large, so that it is difficult for the terminal to select a suitable preamble code according to the uplink path loss and to perform accurate uplink power control, which results in a decrease in uplink communication quality. Therefore, the terminal's failure to correctly recognize the uplink will seriously affect the communication performance.

Disclosure of Invention

The embodiment of the invention provides an uplink communication method and a terminal, which aim to solve the problem that the uplink communication quality is reduced because the terminal directly uses a downlink access point as an uplink access point in the prior art.

In order to solve the technical problem, the embodiment of the invention discloses the following technical scheme:

a method of uplink communication, the method comprising:

the terminal determines an uplink transmission point of the terminal according to configuration information sent by a base station;

and the terminal carries out uplink communication with the uplink transmission point of the terminal.

An uplink communication terminal, the terminal comprising:

a determining unit, configured to determine an uplink transmission point of the terminal according to configuration information sent by a base station;

and the communication unit is used for carrying out uplink communication with the uplink transmission point of the terminal.

In the embodiment of the invention, the terminal determines the uplink transmission point of the terminal according to the configuration information sent by the base station, and the terminal carries out uplink communication with the uplink transmission point of the terminal, so that the uplink access point identification error caused by directly using the downlink access point of the terminal as the uplink access point is avoided, and the uplink communication quality is improved.

A method of uplink communication, the method comprising:

a terminal receives a message containing uplink path loss sent by a base station;

and the terminal determines communication resources according to the uplink path loss and performs uplink communication with an uplink transmission point of the terminal by using the communication resources.

An uplink communication terminal, the terminal comprising:

a receiving unit, configured to receive a message including uplink path loss sent by a base station;

and the communication unit is used for determining communication resources according to the uplink path loss and carrying out uplink communication with the uplink transmission point of the terminal by using the communication resources.

In the embodiment of the invention, the terminal determines the uplink path loss of the terminal according to the configuration information sent by the base station and carries out uplink communication according to the uplink path loss, thereby avoiding the identification error caused by directly using the downlink path loss as the uplink path loss and improving the uplink communication quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1A is a schematic view of an application scenario of a CoMP communication system of a heterogeneous network according to the present invention;

fig. 1B is a schematic view of an application scenario of a CoMP communication system of another heterogeneous network according to the present invention;

fig. 2 is a flowchart of a first embodiment of an uplink communication method according to the present invention;

fig. 3 is a flowchart of a second embodiment of an uplink communication method according to the present invention;

fig. 4 is a flowchart of a third embodiment of an uplink communication method according to the present invention;

fig. 5 is a flowchart of a fourth embodiment of an uplink communication method according to the present invention;

fig. 6 is a flowchart of a fifth embodiment of the uplink communication method according to the present invention;

fig. 7 is a flowchart of a sixth embodiment of an uplink communication method according to the present invention;

fig. 8A is a block diagram of a first embodiment of an uplink communication terminal according to the present invention;

FIG. 8B is a block diagram of a first embodiment of the determination unit of FIG. 8A;

FIG. 8C is a block diagram of a second embodiment of the determination unit of FIG. 8A;

FIG. 8D is a block diagram of a third embodiment of the determination unit of FIG. 8A;

FIG. 8E is a block diagram of a fourth embodiment of the determination unit of FIG. 8A;

FIG. 8F is a block diagram of an embodiment of the communication unit of FIG. 8A;

fig. 9 is a block diagram of a second embodiment of an uplink communication terminal according to the present invention.

Detailed Description

The following embodiments of the present invention provide an uplink communication method and a terminal. The method can be applied to a CoMP scene, and can determine the uplink transmission point of the terminal as a target node for the terminal to perform uplink transmission in CoMP in the CoMP scene.

In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

The embodiments of the present invention may be applied to a CoMP communication system, where the communication system includes a plurality of access points or transmission points connected to each other, such as base stations, where the base stations may be Macro base stations (Macro enbs, or enbs), or micro base stations (Pico base stations, Relay, HeNB, HNB, RRH), and the like, and the embodiments are not limited herein, and in short, a station or a transmission point.

In the embodiment of the present invention, an eNB exemplifies a macro base station corresponding to a macro cell, and an RRH (Remote radio head) exemplifies a micro base station corresponding to a micro cell. Generally, the CoMP communication system can be divided into a homogeneous network communication system and a heterogeneous network communication system, wherein the base stations interconnected in the homogeneous network communication system are macro cell base stations, and the base stations interconnected in the heterogeneous communication system can be macro cell base stations and micro cell base stations. All base stations in the CoMP communication system provide services for a terminal, which is generally referred to as a UE (User Equipment) or a User terminal.

Referring to fig. 1A, a schematic view of an application scenario of a CoMP communication system of a heterogeneous network is shown: fig. 1A includes a macro cell and a micro cell with lower transmit power, where the macro cell and the micro cell together provide a service for a UE, a station in the macro cell is an eNB, and a station in the micro cell is an RRH. Each of the microcells is an independent cell and has an independent cell identity, for example, in fig. 1A, the macrocell has a cell-id1, and the three microcells have a cell-id2, a cell-id3 and a cell-id4, respectively.

Referring to fig. 1B, a schematic view of an application scenario of a CoMP communication system of another heterogeneous network is shown: fig. 1B includes a macro cell and a micro cell with lower transmit power, where the macro cell and the micro cell together provide a service for a UE, a station in the macro cell is an eNB, and a station in the micro cell is an RRH. The scenario shown in fig. 1A is different in that the micro cells are not independent cells and therefore do not have independent cell identifiers, and the micro cells share one cell identifier with the macro cell, where the station in the macro cell is an eNB and the station in the micro cell is an RRH, for example, the cell identifiers of the macro cell and the three micro cells in fig. 1B are both cell-id 1. For a terminal, different CSI-RSs are sent to each site where the terminal performs CoMP, and the terminal performs channel estimation by receiving the CSI-RSs from each site and evaluates the link signal quality between the terminal and the site. Specifically, the terminal obtains the CSI-RS configuration information of each station, and thus receives the CSI-RS transmitted by the station through the CSI-RS configuration information, thereby further measuring the CSI-RS. In the embodiment of the invention, the corresponding relation between the CSI-RS configuration information and the sites can be established. In this embodiment, a set of CSI-RS configuration information is also referred to as a CSI-RS configuration information, and specifically may be a set of uplink CSI-RS configuration information or downlink CSI-RS configuration information, which may both correspond to a transmission point. And determining the station for uplink communication based on the CSI-RS configuration information.

In the following, on the basis of the CoMP communication system introduced above, the uplink communication embodiment of the present invention is described in detail, and unlike the prior art in which the downlink transmission point of the terminal is directly determined as the uplink transmission point, the terminal in the uplink communication embodiment of the present invention determines the uplink transmission point of the terminal according to the configuration information sent by the base station, so as to improve the uplink communication quality of the terminal.

Referring to fig. 2, it is a flowchart of a first embodiment of the uplink communication method of the present invention:

step 201: and the terminal determines the uplink transmission point of the terminal according to the configuration information sent by the base station.

The terminal may determine the uplink transmission point of the terminal in the following manners:

the first method is as follows: the method comprises the steps that a terminal receives at least one set of uplink CSI-RS (Channel State information reference Signal) configuration information sent by a base station, each set of uplink CSI-RS configuration information corresponds to an uplink transmission point, when the terminal receives one set of uplink CSI-RS configuration information, the uplink transmission point corresponding to one set of uplink CSI-RS configuration information is used as the uplink transmission point of the terminal, when the terminal receives at least two sets of uplink CSI-RS configuration information, the Signal quality of each uplink transmission point is obtained by measuring the uplink CSI-RS corresponding to each set of uplink CSI-RS configuration information in the at least two sets of uplink CSI-RS configuration information, and the uplink transmission point with the best Signal quality is selected as the uplink transmission point of the terminal.

The second method comprises the following steps: the terminal receives a plurality of sets of CSI-RS configuration information sent by the base station, and determines a transmission point corresponding to one set of CSI-RS configuration information in the plurality of sets of CSI-RS configuration information as an uplink transmission point of the terminal.

The third method comprises the following steps: the terminal receives a plurality of sets of CSI-RS configuration information sent by the base station, a transmission point corresponding to one set of CSI-RS configuration information in the plurality of sets of CSI-RS configuration information is determined as a main node of the terminal, or a cell corresponding to the corresponding transmission point is determined as a main cell of the terminal, and the main node or the transmission point corresponding to the main cell is determined as an uplink transmission point of the terminal.

The method is as follows: the terminal receives at least one set of downlink CSI-RS configuration information sent by the base station, each set of downlink CSI-RS configuration information corresponds to one downlink transmission point, each downlink CSI-RS corresponding to each set of downlink CSI-RS configuration information is measured, the signal quality or the path loss of each downlink transmission point is obtained, and the downlink transmission point with the best signal quality or the downlink transmission point with the minimum path loss is selected as the uplink transmission point of the terminal.

Step 202: and the terminal carries out uplink communication with the uplink transmission point of the terminal.

The terminal calculates the uplink path loss between the terminal and the uplink transmission point of the terminal, determines the communication resource according to the uplink path loss, and performs uplink communication with the uplink transmission point of the terminal by using the communication resource. Specifically, the terminal may adjust uplink transmission power by the uplink path loss, and perform uplink communication with the uplink transmission point of the terminal by using the uplink transmission power, or the terminal may adjust uplink TA (timing advance) by the uplink path loss, perform uplink communication with the uplink transmission point of the terminal by using the TA, or the terminal also selects a preamble (forward pilot) code by the uplink path loss, performs uplink random access according to the selected preamble code, and performs uplink communication with the uplink transmission point of the terminal.

It can be seen from the above embodiments that, because the terminal can determine the uplink transmission point of the terminal from multiple stations in the CoMP communication system according to the configuration information sent by the base station, instead of directly using the downlink access point of the terminal as the uplink access point, it can be ensured that the cell where the determined uplink transmission point is located has better uplink signal quality, and correspondingly, the terminal can obtain more actual uplink path loss according to the measurement of the uplink transmission point, so that the terminal can select a suitable preamble code to perform accurate uplink power control, thereby improving uplink communication quality.

Referring to fig. 3, a flowchart of a second embodiment of the uplink communication method of the present invention is shown, where the embodiment shows a process in which a terminal determines an uplink transmission point according to uplink CSI-RS configuration information sent by a base station, and performs uplink communication:

step 301: and the terminal receives uplink CSI-RS configuration information sent by the base station, wherein each set of uplink CSI-RS configuration information corresponds to one uplink transmission point.

In the embodiment of the present invention, the CSI-RS configuration information mainly refers to information of a CSI-RS used by a station, and each set of CSI-RS configuration information includes at least one of the following information: the method comprises the steps of a CSI-RS sequence, time-frequency resource configuration sent by the CSI-RS, a sending period, configuration identification of the CSI-RS, a CSI-RS configuration index number, an antenna port for sending the CSI-RS, the number of antennas used for sending the CSI-RS, subframe configuration, CSI-RS resources and other information. Therefore, the terminal can receive the CSI-RS signal by using the CSI-RS configuration information and then measure the CSI-RS signal or feed back the quality of the measured signal. In a CoMP communication system, CSI-RS configuration information of different base stations may be sent to a terminal through one base station. The set of CSI-RS configurations may also be referred to as one CSI-RS configuration information, where the configuration information of one CSI-RS is the configuration of one CSI-RS transmitted for each station.

Each set of uplink CSI-RS configuration information corresponds to one uplink transmission point, and specifically, for one terminal, different transmission points send different CSI-RSs to the terminal, that is, one CSI-RS is from one transmission point. The terminal needs to obtain the configuration information of the CSI-RS before receiving the CSI-RS sent by the transmission point through the configuration information. Therefore, each set of uplink CSI-RS configuration information corresponds to one uplink transmission point. Further, the terminal evaluates the signal quality of each uplink transmission point by measuring the CSI-RS signal transmitted by each uplink transmission point, thereby determining the best uplink transmission point.

The configuration information of the CSI-RS may be accessed to the network by the serving base station of the terminal at the terminal, or the terminal may send the configuration information to the terminal during the handover process.

The terminal may receive a CoMP set (CoMP set) transmitted by the base station. The CoMP set (CoMP set) contains configuration information of at least one CSI-RS. The CoMP set is a set of stations directly or indirectly participating in providing CoMP services for the terminal, and the CoMP set is understood as related information of the set of stations.

The CoMP set (CoMP set) may be any of the following sets: CoMP resource Management Set (CoMP resource Management Set), CoMP coordination Set (coordination Set), CoMP Measurement Set (Measurement Set), radio resource Management RM (resource Management) Set (RM Set), or Extended Measurement Set (Extended Measurement Set). The embodiments of the present invention are merely examples, and the set is not limited.

And the CoMP cooperation set is a set of sites which directly and/or indirectly transmit data to the terminal on the same time-frequency resource.

CoMP measurement set: the terminal measures the site set of the channel state between the terminal and the sites. The extended measurement set is extended on this set basis.

CoMP radio resource management RM set: a set of cells for the terminal to perform radio resource management measurements.

The CoMP set may be an uplink CoMP set and a downlink CoMP set.

The "receiving, by the terminal, the uplink CSI-RS configuration information sent by the base station" in step 301 may specifically be that the terminal receives a CoMP set sent by the base station, where the CoMP set includes the uplink CSI-RS configuration information (or CSI-RS configuration information of an uplink point), and the CoMP set may also include the downlink CSI-RS configuration information (or CSI-RS configuration information of a downlink point).

Or, the "receiving, by the terminal, the uplink CSI-RS configuration information sent by the base station" in step 301 may specifically be that the terminal receives a CoMP set sent by the base station, where the CoMP set includes CSI-RS configuration information corresponding to the uplink transmission point and the downlink transmission point being the same point. Meanwhile, the base station can also provide the CSI-RS configuration information of only the downlink point for the terminal independently.

Step 302: judging whether only one set of uplink CSI-RS configuration information is received, if so, executing step 303; otherwise, step 304 is performed.

Step 303: and step 305 is executed by taking the uplink transmission point corresponding to the set of uplink CSI-RS configuration information as the uplink transmission point of the terminal.

When the uplink CSI-RS configuration information sent by the base station is only one set, the terminal determines an uplink transmission point corresponding to the set of uplink CSI-RS configuration information as the uplink transmission point of the terminal.

Step 304: and measuring the uplink CSI-RS corresponding to each set of uplink CSI-RS configuration information, obtaining the signal quality of each uplink transmission point, and selecting the uplink transmission point with the best signal quality as the uplink transmission point of the terminal.

And when the uplink CSI-RS configuration information sent by the base station is more than one set, the terminal measures the uplink CSI-RS corresponding to each set of uplink CSI-RS configuration information to obtain a measurement result, the measurement result reflects the signal quality of each uplink transmission point, and one uplink transmission point with the best signal quality is selected from the measurement results to serve as the uplink transmission point of the terminal.

Wherein, the measurement result can be any one of the following information: RSRP (Reference Signal Receiving power), RSRQ (Reference Signal Receiving Quality), SINR (Signal to Interference plus Noise Ratio), SNR (Signal Noise Ratio), RSSI (Received Signal Strength Indication), CQI (Channel Quality Indication), PMI (Payload missing Indication), and the like, and are not particularly limited herein.

Step 305: and the terminal calculates and determines the uplink path loss between the uplink transmission points.

Step 306: upstream communication is performed through upstream path loss.

The terminal can adjust uplink transmitting power through uplink path loss, or the terminal can adjust uplink TA through uplink path loss, or the terminal performs a random access process, and the terminal selects a preamble code by using the uplink path loss between the terminal and an uplink transmission point and performs uplink random access according to the selected preamble code.

And when the terminal selects the preamble code by using the uplink path loss, acquiring a preset path loss threshold, and when the calculated uplink path loss is less than the path loss threshold, selecting the preamble in the preamble B group, otherwise, selecting the preamble in the preamble A group. After selecting the appropriate preamble code, the terminal sends the selected preamble code by using the determined uplink random access resource of the uplink access point, and performs random access.

It can be seen from the above embodiments that, because the terminal can determine the uplink transmission point of the terminal according to the uplink CSI-RS configuration information sent by the base station, instead of directly using the downlink access point of the terminal as the uplink access point, the uplink path loss closer to the actual uplink path loss is obtained according to the uplink transmission point measurement, so that the terminal can select an appropriate preamble code to perform accurate uplink power control, thereby improving the uplink communication quality.

Referring to fig. 4, a flowchart of a third embodiment of the uplink communication method of the present invention is shown, where the embodiment shows a process in which a terminal determines an uplink transmission point according to multiple sets of CSI-RS configuration information sent by a base station, and performs uplink communication:

step 401: and the terminal receives a plurality of sets of CSI-RS configuration information sent by the base station.

In the embodiment of the present invention, the CSI-RS configuration information mainly refers to information of a CSI-RS used by a station, and each set of CSI-RS configuration information includes at least one of the following information: the method comprises the steps of a CSI-RS sequence, time-frequency resource configuration sent by the CSI-RS, a sending period, configuration identification of the CSI-RS, a CSI-RS configuration index number, an antenna port for sending the CSI-RS, the number of antennas used for sending the CSI-RS, subframe configuration, CSI-RS resources and other information. Therefore, the terminal can receive the CSI-RS signal by using the CSI-RS configuration information and then measure the CSI-RS signal or feed back the quality of the measured signal. In a CoMP communication system, CSI-RS configuration information of different base stations may be sent to a terminal through one base station.

Step 402: and determining a transmission point corresponding to one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal.

The terminal can determine a transmission point corresponding to one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal by adopting the following two ways:

the first mode is as follows: the terminal may determine a transmission point corresponding to one set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal.

Namely, the base station provides the indication information to indicate that the transmission point corresponding to a certain set of CSI-RS configuration information of the multiple sets of CSI-RS configuration information is the uplink transmission point of the terminal. Specifically, multiple sets of CSI-RS configuration information may be provided, and at the same time, indication information may be carried, which indicates that a transmission point corresponding to a certain set of CSI-RS configuration information is an uplink transmission point of the terminal. The indication information may be one bit of information added to one CSI-RS configuration information so as to be distinguished from other CSI-RS configuration information; the network side can also use the indication information alone to indicate that the transmission point corresponding to a certain set of CSI-RS configuration information is the uplink transmission point of the terminal. The specific manner of the indication information may be different, and is not described herein again.

According to indication information added by the base station in different sets of CSI-RS configuration information, the terminal can determine a transmission point corresponding to an Nth set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal, wherein the Nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, and can be, for example, a first set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information; or, the terminal may determine a transmission point corresponding to CSI-RS configuration information sent on a certain port indicated in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal, and when the terminal receives the CSI-RS configuration information from the port, the transmission point corresponding to the CSI-RS configuration information may be determined as the uplink transmission point of the terminal.

The second mode is as follows: the terminal may also determine a transmission point corresponding to a set of preset CSI-RS configuration information in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal. That is, a transmission point corresponding to a certain set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information is adopted as an uplink transmission point of the terminal in a preset manner (specifically, a manner that the terminal negotiates with the base station in advance, or a manner that the terminal defaults with the base station).

According to a result of pre-negotiation between the terminal and the base station, the terminal may determine a transmission point corresponding to an nth set of CSI-RS configuration information of the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal by default, where the nth set of CSI-RS configuration information may be any one set of CSI-RS configuration information of the multiple sets of CSI-RS configuration information, and may be, for example, a first set of CSI-RS configuration information of the multiple sets of CSI-RS configuration information; or, the terminal may default to determine a transmission point corresponding to CSI-RS configuration information sent from a port of multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal, and when the terminal receives the CSI-RS configuration information from the port, the transmission point corresponding to the CSI-RS configuration information may be determined as the uplink transmission point of the terminal.

Step 403: and the terminal calculates and determines the uplink path loss between the uplink transmission points.

When the terminal performs the random access process, the terminal calculates the uplink path loss between the terminal and the uplink transmission point.

Step 404: and carrying out uplink communication through the uplink path loss.

The terminal may adjust the uplink transmit power through the uplink path loss, or the terminal may adjust the uplink TA through the uplink path loss, or the terminal also selects the preamble code through the uplink path loss, and performs uplink random access according to the selected preamble code.

And when the terminal selects the preamble code by using the uplink path loss, acquiring a preset path loss threshold, and when the calculated uplink path loss is less than the path loss threshold, selecting the preamble in the preamble B, otherwise, selecting the preamble in the preamble A. After selecting the appropriate preamble code, the terminal sends the selected preamble code by using the determined uplink random access resource of the uplink access point, and performs random access.

It can be seen from the above embodiments that, because the terminal can determine the uplink transmission point of the terminal according to the multiple sets of CSI-RS configuration information sent by the base station, instead of directly using the downlink access point of the terminal as the uplink access point, it can be ensured that the cell where the determined uplink transmission point is located has better uplink signal quality, and correspondingly, the terminal can obtain a more actual uplink path loss according to the measurement of the uplink transmission point, so that the terminal can select an appropriate preamble code to perform accurate uplink power control, thereby improving the uplink communication quality.

Referring to fig. 5, a flowchart of a fourth embodiment of the uplink communication method of the present invention is shown, where the embodiment shows a process in which a terminal determines a master node or a master cell of the terminal according to CSI-RS configuration information sent by a base station, and further determines an uplink transmission point of the terminal, so as to perform uplink communication:

step 501: and the terminal receives a plurality of sets of CSI-RS configuration information sent by the base station.

Step 502: and determining a transmission point corresponding to one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determining a cell corresponding to the corresponding transmission point as a main cell of the terminal.

The terminal can determine a transmission point corresponding to one set of CSI-RS configuration information in a plurality of sets of CSI-RS configuration information as a main node of the terminal in the following two ways, or determine a cell corresponding to the corresponding transmission point as a main cell of the terminal:

the first mode is as follows: the terminal may determine a transmission point corresponding to one set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the corresponding transmission point as a master cell of the terminal.

The indication information provided by the base station indicates that a transmission point corresponding to a certain set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information is a main node of the terminal, or a cell corresponding to the corresponding transmission point is determined as a main cell of the terminal. Specifically, multiple sets of CSI-RS configuration information may be provided, and at the same time, indication information may be carried, which indicates that a transmission point corresponding to a certain set of CSI-RS configuration information is a primary node of the terminal, or a cell corresponding to the corresponding transmission point is determined as a primary cell of the terminal. The indication information may be one bit of information added to one CSI-RS configuration information so as to be distinguished from other CSI-RS configuration information; the network side may also use the indication information alone to indicate that a transmission point corresponding to a certain set of CSI-RS configuration information is a primary node of the terminal, or determine a cell corresponding to the corresponding transmission point as a primary cell of the terminal. The specific manner of the indication information may be different, and is not described herein again.

According to indication information added by the base station in different sets of CSI-RS configuration information, the terminal can determine a transmission point corresponding to the Nth set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determine a cell corresponding to the corresponding transmission point as a main cell of the terminal, wherein the Nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, and can be the first set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, for example; or, the terminal may determine a transmission point corresponding to CSI-RS configuration information sent on a certain port indicated in the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the corresponding transmission point as a master cell of the terminal, and when the terminal receives the CSI-RS configuration information from the port, may determine the transmission point corresponding to the CSI-RS configuration information as the master node of the terminal, or determine the cell corresponding to the corresponding transmission point as the master cell of the terminal.

The second mode is as follows: the terminal may also determine a transmission point corresponding to a set of preset CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the corresponding transmission point as a master cell of the terminal. That is, a transmission point corresponding to a certain set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information is used as a master node of the terminal, or a cell corresponding to the corresponding transmission point is used as a master cell of the terminal, in a preset manner (specifically, a manner that the terminal negotiates with the base station in advance, or a manner that the terminal defaults with the base station).

According to a result of pre-negotiation between the terminal and the base station, the terminal may determine a transmission point corresponding to the nth set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a master node of the terminal by default, or determine a cell corresponding to the corresponding transmission point as a master cell of the terminal, where the nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, and may be, for example, the first set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information; or, the terminal may default to determine a transmission point corresponding to CSI-RS configuration information sent from a port of multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the corresponding transmission point as a master cell of the terminal, and when the terminal receives the CSI-RS configuration information from the port, may determine the transmission point corresponding to the CSI-RS configuration information as the master node of the terminal, or determine the cell corresponding to the corresponding transmission point as the master cell of the terminal.

The primary node of the terminal (may be referred to as an anchor node, a primary point, or the like), may also be referred to as a primary site, and specifically may include: a downlink transmission point for sending a control signaling; or, a transmission point corresponding to a macro base station or a macro cell; or, a transmission point corresponding to the primary cell of the first primary cell; or, a transmission point corresponding to a Serving cell (Serving cell) of the user terminal.

The Primary cell (which may be referred to as a Primary cell, an Anchor cell, or the like) of the terminal may specifically include: a cell for sending control signaling for user equipment; or, a cell corresponding to the downlink transmission point for sending the control signaling; or, a cell corresponding to the macro base station; or, in the RRC connection establishment, or RRC connection re-establishment, or handover process of the terminal, providing NAS (Non-Access-Stratum) mobility information for the terminal; or, in the RRC connection establishment or handover process of the terminal, a cell providing security input (security input) for the terminal. Specific safe input modes can be found in the prior art, and the embodiment does not limit the modes.

The transmitting the control signaling may include transmitting at least one of the following signaling information: a PHICH (Physical hybrid Automatic Repeat-request (harq) Indicator Channel) is transmitted, a PCFICH (Physical Control Format Indicator Channel) is transmitted, information on a PDCCH (Physical downlink Control Channel) is transmitted, a system message is transmitted, a Physical layer signaling is transmitted, a MAC (Media Access Control layer) message is transmitted, and an RRC (radio resource Control layer) message is transmitted.

Step 503: and determining a transmission point corresponding to the main node or the main cell as an uplink transmission point of the terminal.

Step 504: and the terminal calculates and determines the uplink path loss between the uplink transmission points.

When uplink data arrives, downlink data arrives, or a radio link fails, the terminal performs a random access process, and at this time, the terminal calculates uplink path loss between the terminal and an uplink transmission point.

Step 505: upstream communication is performed through upstream path loss.

It can be seen from the above embodiments that, because the terminal can determine the master node or the master cell of the terminal according to the multiple sets of CSI-RS configuration information sent by the base station, instead of directly using the downlink access point of the terminal as the uplink access point, it can be ensured that the cell where the determined uplink transmission point is located has better uplink signal quality, and correspondingly, the terminal can obtain more actual uplink path loss according to the measurement of the uplink transmission point, so that the terminal can select an appropriate preamble code to perform accurate uplink power control, thereby improving uplink communication quality.

Referring to fig. 6, a flowchart of a fifth embodiment of the uplink communication method according to the present invention is shown, where the embodiment shows a process in which a terminal determines an uplink transmission point according to downlink CSI-RS configuration information sent by a base station, and performs uplink communication:

step 601: and the terminal receives downlink CSI-RS configuration information sent by the base station, wherein each set of downlink CSI-RS configuration information corresponds to one downlink transmission point.

In the embodiment of the invention, the CSI-RS configuration information mainly comprises a time frequency resource position and a corresponding port number for receiving the CSI-RS. In a CoMP communication system, CSI-RS configuration information of different base stations may be sent to a terminal through one base station.

The terminal may receive a CoMP set (CoMP set) including downlink CSI-RS configuration information sent by the base station, where the CoMP set may be referred to as a downlink CoMP set. The downlink CoMP set comprises at least one of the following sets: a downlink CoMP coordination set (coordination set), a downlink CoMP Measurement set (Measurement set), a downlink Radio Resource Management (RRM) set (RRM set), and a downlink Extended Measurement set (Extended Measurement set).

Step 602: and measuring each downlink CSI-RS corresponding to each set of downlink CSI-RS configuration information to obtain the signal quality or path loss of each downlink transmission point.

Step 603: and selecting the downlink transmission point with the best signal quality or the downlink transmission point with the minimum path loss as the uplink transmission point of the terminal.

When the downlink transmission point with the best signal quality is obtained, the terminal measures the downlink CSI-RS corresponding to each set of downlink CSI-RS configuration information, obtains the RSRP of each downlink transmission point, and selects one downlink transmission point with the best signal quality as the uplink transmission point of the terminal.

When the downlink transmission point with the minimum path loss is obtained, the terminal measures the downlink CSI-RS corresponding to each set of downlink CSI-RS configuration information to obtain the transmitting power of each downlink transmission point, the transmitting power obtained by measurement is subtracted from the actually received transmitting power to obtain the path loss of the downlink transmission point, and the downlink transmission point with the minimum path loss is selected from all the path losses to serve as the uplink transmission point of the terminal.

Step 604: and the terminal calculates and determines the uplink path loss between the uplink transmission points.

Step 605: upstream communication is performed through upstream path loss.

It can be seen from the above embodiments that, because the terminal can determine the uplink transmission point of the terminal according to the sets of downlink CSI-RS configuration information sent by the base station, instead of directly using the downlink access point of the terminal as the uplink access point, it can be ensured that the cell where the determined uplink transmission point is located has better uplink signal quality, and correspondingly, the terminal can obtain more actual uplink path loss according to the measurement of the uplink transmission point, so that the terminal can select a suitable preamble code to perform accurate uplink power control, thereby improving uplink communication quality.

Referring to fig. 7, a flowchart of a sixth embodiment of the uplink communication method of the present invention is shown, where the sixth embodiment shows a process in which a terminal directly receives an uplink pathloss message sent by a base station and performs uplink communication:

step 701: and the terminal receives the message containing the uplink path loss sent by the base station.

In this embodiment, after the terminal accesses the network, the base station may directly send a message including the uplink path loss to the terminal, so that the terminal directly performs uplink communication according to the uplink path loss. The base station may update the latest uplink path loss in the system in real time by periodically sending a message.

Step 702: and the terminal determines communication resources according to the uplink path loss and performs uplink communication with the uplink transmission point of the terminal by using the communication resources.

The terminal can adjust the uplink transmitting power through the uplink path loss, and performs uplink communication with an uplink transmission point of the terminal by using the uplink transmitting power; the terminal can also adjust the uplink timing advance TA through the uplink path loss and perform uplink communication with the uplink transmission point of the terminal by utilizing the TA; the terminal can also select the preamble through the uplink path loss, perform uplink random access according to the selected preamble and perform uplink communication with the uplink transmission point of the terminal.

It can be seen from the above embodiments that, compared with the prior art in which a downlink access point of a terminal is directly used as an uplink access point, and thus uplink path loss with low accuracy is easily obtained, since the terminal can perform uplink communication according to the uplink path loss sent by a base station, and the uplink path loss is relatively accurate, the terminal can select a suitable preamble code to perform accurate uplink power control, thereby improving uplink communication quality.

Corresponding to the embodiment of the uplink communication method, the invention also provides the embodiment of the uplink communication terminal for executing the uplink communication method.

Referring to fig. 8A, a block diagram of a first embodiment of an uplink communication terminal according to the present invention is shown:

the terminal includes: a determination unit 810 and a communication unit 820.

The determining unit 810 is configured to determine an uplink transmission point of the terminal according to configuration information sent by a base station;

a communication unit 820, configured to perform uplink communication with an uplink transmission point of the terminal.

Referring to fig. 8B, a block diagram of a first embodiment of the determination unit in fig. 8A:

the determining unit 810 may include:

a first configuration information receiving subunit 8101, configured to receive at least one set of uplink signal state information reference signal CSI-RS configuration information sent by a base station, where each set of uplink CSI-RS configuration information corresponds to an uplink transmission point;

the first uplink transmission point determining subunit 8102 is configured to, when a set of uplink CSI-RS configuration information is received, use an uplink transmission point corresponding to the set of uplink CSI-RS configuration information as an uplink transmission point of the terminal, when at least two sets of uplink CSI-RS configuration information are received, obtain a signal quality of each uplink transmission point by measuring an uplink CSI-RS corresponding to each set of uplink CSI-RS configuration information in the at least two sets of uplink CSI-RS configuration information, and select an uplink transmission point with a best signal quality as the uplink transmission point of the terminal.

Referring to fig. 8C, a block diagram of a second embodiment of the determination unit in fig. 8A:

the determining unit 810 may include:

a second configuration information receiving subunit 8103, configured to receive multiple sets of CSI-RS configuration information sent by the base station;

a second uplink transmission point determining subunit 8104, configured to determine a transmission point corresponding to one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as the uplink transmission point of the terminal.

The second uplink transmission point determining subunit 814 may include at least one of the following subunits (not shown in fig. 8C):

a first indication determining subunit, configured to determine, as an uplink transmission point of the terminal, a transmission point corresponding to one set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information; the first indication determining subunit may be specifically configured to determine, as an uplink transmission point of the terminal, a transmission point corresponding to an nth set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information, where the nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, or determine, as the uplink transmission point of the terminal, a transmission point corresponding to CSI-RS configuration information sent on a certain port indicated in the multiple sets of CSI-RS configuration information; n is a natural number, and N sets are smaller than a plurality of sets;

a first preset determining subunit, configured to determine, as an uplink transmission point of the terminal, a transmission point corresponding to a set of preset CSI-RS configuration information in the multiple sets of CSI-RS configuration information; the first preset determining subunit may be specifically configured to determine, as an uplink transmission point of the terminal, a transmission point corresponding to an nth set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, where the nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, or determine, as the uplink transmission point of the terminal, a transmission point corresponding to CSI-RS configuration information sent on a certain port in the multiple sets of CSI-RS configuration information; n is a natural number, and the number of N sets is less than that of the multiple sets.

Referring to fig. 8D, a block diagram of a third embodiment of the determination unit in fig. 8A is shown:

the determining unit 810 may include:

a third configuration information receiving subunit 8105, where the terminal receives multiple sets of CSI-RS configuration information sent by the base station;

a main node or main cell determining subunit 8106, which determines a transmission point corresponding to one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determines a cell corresponding to the transmission point as a main cell of the terminal;

a third uplink transmission point determining subunit 8107, configured to determine a transmission point corresponding to the master node or the master cell as an uplink transmission point of the terminal.

Wherein the primary node or primary cell determining subunit may comprise at least one of the following subunits (not shown in fig. 8D):

a second indication determining subunit, configured to determine a transmission point corresponding to one set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the transmission point as a master cell of the terminal; the second indication determining subunit may be specifically configured to determine, as a master node of the terminal, a transmission point corresponding to an nth set of CSI-RS configuration information indicated in the sets of CSI-RS configuration information, or determine, as a master cell of the terminal, a cell corresponding to the transmission point, where the nth set of CSI-RS configuration information is any set of CSI-RS configuration information in the sets of CSI-RS configuration information, or determine, as a master node of the terminal, a transmission point corresponding to CSI-RS configuration information sent on a certain port indicated in the sets of CSI-RS configuration information, or determine, as a master cell of the terminal, a cell corresponding to the transmission point;

a second preset determining subunit, configured to determine a transmission point corresponding to a set of preset CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the transmission point as a master cell of the terminal; the second preset determining subunit may be specifically configured to determine a transmission point corresponding to an nth set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the transmission point as a master cell of the terminal, where the nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, or determine a transmission point corresponding to CSI-RS configuration information sent on a certain port of the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the transmission point as a master cell of the terminal; n is a natural number, and the number of N sets is less than that of the multiple sets.

Referring to fig. 8E, a block diagram of a fourth embodiment of the determination unit in fig. 8A is shown:

the determining unit 810 may include:

a fourth configuration information receiving subunit 8108, configured to receive downlink CSI-RS configuration information sent by a base station, where each set of downlink CSI-RS configuration information corresponds to one downlink transmission point;

a configuration information measuring subunit 8109, configured to measure each downlink CSI-RS corresponding to each set of downlink CSI-RS configuration information, and obtain signal quality or path loss of each downlink transmission point;

a fourth uplink transmission point determining subunit 8110, selects the downlink transmission point with the best signal quality or the downlink transmission point with the smallest path loss as the uplink transmission point of the terminal.

Referring to fig. 8F, a block diagram of an embodiment of the communication unit in fig. 8A is shown:

the communication unit 820 may include:

an uplink calculation subunit 8201, configured to calculate an uplink path loss between a terminal and an uplink transmission point of the terminal;

an uplink communication subunit 8202, configured to determine a communication resource according to the uplink path loss, and perform uplink communication with an uplink transmission point of the terminal by using the communication resource.

The uplink communication subunit may be specifically configured to adjust uplink transmission power by the uplink path loss, and perform uplink communication with an uplink transmission point of the terminal by using the uplink transmission power; and/or adjusting an uplink Timing Advance (TA) through the uplink path loss, and performing uplink communication with an uplink transmission point of the terminal by using the TA; and/or selecting a preamble code through the uplink path loss, performing uplink random access according to the selected preamble code, and performing uplink communication with an uplink transmission point of the terminal.

Referring to fig. 9, it is a block diagram of a second embodiment of the uplink communication terminal of the present invention:

the terminal includes: a receiving unit 910 and a communication unit 920.

The receiving unit 910 is configured to receive a message that includes uplink path loss and is sent by a base station;

a communication unit 920, configured to determine a communication resource according to the uplink path loss, and perform uplink communication with an uplink transmission point of the terminal by using the communication resource.

The communication unit 920 may be specifically configured to adjust uplink transmission power through the uplink path loss, and perform uplink communication with an uplink transmission point of the terminal by using the uplink transmission power; and/or adjusting an uplink Timing Advance (TA) through the uplink path loss, and performing uplink communication with an uplink transmission point of the terminal by using the TA; and/or selecting a preamble code through the uplink path loss, performing uplink random access according to the selected preamble code, and performing uplink communication with an uplink transmission point of the terminal.

As can be seen from the above embodiments, the terminal determines the uplink transmission point of the terminal according to the configuration information sent by the base station, and the terminal performs uplink communication with the uplink transmission point of the terminal. When the embodiment of the invention is applied to a CoMP communication system, the terminal can determine the uplink transmission point of the terminal from a plurality of sites in the CoMP communication system according to the configuration information sent by the base station instead of directly using the downlink access point of the terminal as the uplink access point, so that the cell where the determined uplink transmission point is located has better uplink signal quality, and correspondingly, the terminal can obtain more actual uplink path loss according to the measurement of the uplink transmission point, so that the terminal can select a proper preamble code to perform accurate uplink power control, thereby improving the uplink communication quality.

Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An uplink communication method, the method comprising:

the terminal carries out uplink communication with an uplink transmission point of the terminal;

the determining, by the terminal, the uplink transmission point of the terminal according to the configuration information sent by the base station includes:

the method comprises the steps that a terminal receives at least one set of uplink channel state information reference signal (CSI-RS) configuration information sent by a base station, and each set of the uplink CSI-RS configuration information corresponds to an uplink transmission point;

when the terminal receives a set of uplink CSI-RS configuration information, an uplink transmission point corresponding to the set of uplink CSI-RS configuration information is used as the uplink transmission point of the terminal, when the terminal receives at least two sets of uplink CSI-RS configuration information, the signal quality of each uplink transmission point is obtained by measuring the uplink CSI-RS corresponding to each set of uplink CSI-RS configuration information in the at least two sets of uplink CSI-RS configuration information, and the uplink transmission point with the best signal quality is selected as the uplink transmission point of the terminal.

2. The method of claim 1, wherein the uplink communication between the terminal and the uplink transmission point of the terminal comprises:

the terminal calculates the uplink path loss between the terminal and the uplink transmission point of the terminal;

3. The method of claim 2, wherein the terminal determines a communication resource according to the uplink pathloss, and wherein performing uplink communication with an uplink transmission point of the terminal using the communication resource comprises at least one of:

the terminal adjusts the uplink transmitting power through the uplink path loss and performs uplink communication with an uplink transmission point of the terminal by using the uplink transmitting power;

the terminal adjusts the uplink timing advance TA through the uplink path loss and utilizes the TA to carry out uplink communication with an uplink transmission point of the terminal;

and the terminal selects the preamble through the uplink path loss, performs uplink random access according to the selected preamble and performs uplink communication with the uplink transmission point of the terminal.

4. The method of claim 1, wherein the receiving, by the terminal, at least one set of uplink CSI-RS configuration information sent by the base station comprises: the terminal receives a coordinated multi-point transmission (CoMP) set which is sent by a base station and contains at least one set of uplink CSI-RS configuration information; the method further comprises the following steps: extracting at least one set of uplink CSI-RS configuration information from the CoMP set;

the CoMP set includes at least one of the following sets: the system comprises an uplink CoMP cooperation set, an uplink CoMP measurement set, an uplink Radio Resource Management (RRM) set and an uplink expansion measurement set.

5. The method according to any of claims 1-3, wherein the determining, by the terminal, the uplink transmission point of the terminal according to the configuration information sent by the base station comprises:

the terminal receives a plurality of sets of CSI-RS configuration information sent by the base station;

and determining a transmission point corresponding to one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal.

6. The method of claim 5, wherein the determining a transmission point corresponding to one of the sets of CSI-RS configuration information as an uplink transmission point of the terminal comprises:

determining a transmission point corresponding to one set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal; or,

and determining a transmission point corresponding to a preset set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal.

7. The method of claim 6,

determining a transmission point corresponding to a set of CSI-RS configuration information indicated in the plurality of sets of CSI-RS configuration information as an uplink transmission point of the terminal includes:

determining a transmission point corresponding to an Nth set of CSI-RS configuration information indicated in the plurality of sets of CSI-RS configuration information as an uplink transmission point of the terminal, wherein the Nth set of CSI-RS configuration information is any set of CSI-RS configuration information in the plurality of sets of CSI-RS configuration information; or,

determining a transmission point corresponding to the CSI-RS configuration information sent from one port indicated in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal;

the determining a transmission point corresponding to a set of preset CSI-RS configuration information in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal includes:

determining a transmission point corresponding to an Nth set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal, wherein the Nth set of CSI-RS configuration information is any set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information; or,

determining a transmission point corresponding to the CSI-RS configuration information sent from one port of the multiple sets of CSI-RS configuration information as an uplink transmission point of the terminal;

n is a natural number, and the number of N sets is less than that of the multiple sets.

8. An uplink communication method, the method comprising:

determining a transmission point corresponding to one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determining a cell corresponding to the transmission point as a main cell of the terminal;

and determining the transmission point corresponding to the main node or the main cell as an uplink transmission point of the terminal.

9. The method of claim 8, wherein the uplink communication between the terminal and the uplink transmission point of the terminal comprises:

10. The method of claim 9, wherein the terminal determines a communication resource according to the uplink pathloss, and wherein performing uplink communication with an uplink transmission point of the terminal using the communication resource comprises at least one of:

11. The method of claim 8,

the main node of the terminal comprises:

a downlink transmission point for sending a control signaling; or, a transmission point corresponding to a macro base station or a macro cell; or, a transmission point corresponding to the primary cell of the first primary cell; or, a transmission point corresponding to a serving cell of the terminal;

the primary cell of the terminal comprises:

a cell for sending a control signaling to a terminal; or, a cell corresponding to the downlink transmission point for sending the control signaling; or, a cell corresponding to the macro base station; or, establishing an RRC connection, or reestablishing an RRC connection, or providing a cell of non-access stratum NAS mobility information for the terminal in a handover process; or, in the process of establishing RRC connection or switching, providing a cell with security input for the terminal.

12. The method of claim 10, wherein the sending control signaling comprises sending at least one of the following signaling information:

sending a hybrid automatic repeat request indicator channel, sending a control information format indicator channel, sending information on a control channel, sending system messages, sending physical layer signaling, sending Media Access Control (MAC) layer messages, and sending Radio Resource Control (RRC) layer messages.

13. The method of claim 8, wherein the determining a transmission point corresponding to one set of CSI-RS configuration information among the multiple sets of CSI-RS configuration information as a primary node of the terminal, or determining a cell corresponding to the transmission point as a primary cell of the terminal comprises:

determining a transmission point corresponding to one set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determining a cell corresponding to the transmission point as a main cell of the terminal; or,

and determining a transmission point corresponding to a preset set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determining a cell corresponding to the transmission point as a main cell of the terminal.

14. The method of claim 13, wherein the determining a transmission point corresponding to a set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information as a primary node of the terminal, or determining a cell corresponding to the transmission point as a primary cell of the terminal comprises:

determining a transmission point corresponding to the N sets of CSI-RS configuration information indicated in the sets of CSI-RS configuration information as a main node of the terminal, or determining a cell corresponding to the transmission point as a main cell of the terminal, wherein the N sets of CSI-RS configuration information are any set of CSI-RS configuration information in the sets of CSI-RS configuration information; or,

determining a transmission point corresponding to the CSI-RS configuration information sent from one port indicated in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determining a cell corresponding to the transmission point as a main cell of the terminal;

the determining a transmission point corresponding to a set of preset CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a master node of the terminal, or determining a cell corresponding to the transmission point as a master cell of the terminal includes:

determining a transmission point corresponding to an Nth set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determining a cell corresponding to the transmission point as a main cell of the terminal, wherein the Nth set of CSI-RS configuration information is any set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information; or,

determining a transmission point corresponding to the CSI-RS configuration information sent from one port of the multiple sets of CSI-RS configuration information as a main node of the terminal, or determining a cell corresponding to the transmission point as a main cell of the terminal;

15. The method according to any one of claims 8-10, wherein the determining, by the terminal, the uplink transmission point according to the CSI-RS configuration information sent by the base station comprises:

the terminal receives at least one set of downlink CSI-RS configuration information sent by a base station, wherein each set of downlink CSI-RS configuration information corresponds to one downlink transmission point;

measuring each downlink CSI-RS corresponding to each set of downlink CSI-RS configuration information to obtain the signal quality or path loss of each downlink transmission point;

and selecting the downlink transmission point with the best signal quality or the downlink transmission point with the minimum path loss as the uplink transmission point of the terminal.

16. The method of claim 15, wherein the receiving, by the terminal, the downlink CSI-RS configuration information sent by the base station comprises: a terminal receives a CoMP set which contains downlink CSI-RS configuration information and is sent by a base station; the method further comprises the following steps: extracting at least one set of uplink CSI-RS configuration information from the CoMP set;

the CoMP set includes at least one of the following sets: the system comprises a downlink CoMP cooperation set, a downlink CoMP measurement set, a downlink Radio Resource Management (RRM) set and a downlink extension measurement set.

17. An uplink communication terminal, comprising:

a communication unit, configured to perform uplink communication with an uplink transmission point of the terminal;

the determination unit includes:

the first configuration information receiving subunit is used for receiving at least one set of uplink channel state information reference signal (CSI-RS) configuration information sent by a base station, wherein each set of the uplink CSI-RS configuration information corresponds to one uplink transmission point;

the first uplink transmission point determining subunit is configured to, when a set of uplink CSI-RS configuration information is received, use an uplink transmission point corresponding to the set of uplink CSI-RS configuration information as an uplink transmission point of the terminal, and when at least two sets of uplink CSI-RS configuration information are received, obtain signal quality of each uplink transmission point by measuring an uplink CSI-RS corresponding to each set of uplink CSI-RS configuration information in the at least two sets of uplink CSI-RS configuration information, and select an uplink transmission point with the best signal quality as the uplink transmission point of the terminal.

18. The terminal according to claim 17, wherein the communication unit comprises:

an uplink calculation subunit, configured to calculate an uplink path loss between a terminal and an uplink transmission point of the terminal;

and the uplink communication subunit is used for determining communication resources according to the uplink path loss and carrying out uplink communication with the uplink transmission point of the terminal by using the communication resources.

19. The terminal according to claim 18, wherein the uplink communication subunit is specifically configured to perform uplink communication with the uplink transmission point of the terminal by at least one of the following manners:

adjusting uplink transmitting power through the uplink path loss, and performing uplink communication with an uplink transmission point of the terminal by using the uplink transmitting power;

adjusting an uplink Timing Advance (TA) through the uplink path loss, and performing uplink communication with an uplink transmission point of the terminal by using the TA;

and selecting a preamble according to the uplink path loss, performing uplink random access according to the selected preamble, and performing uplink communication with an uplink transmission point of the terminal.

20. The terminal according to any of claims 17-19, wherein the determining unit comprises:

the second configuration information receiving subunit is used for receiving multiple sets of CSI-RS configuration information sent by the base station;

and a second uplink transmission point determining subunit, configured to determine a transmission point corresponding to one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as the uplink transmission point of the terminal.

21. The terminal of claim 20, wherein the second uplink transmission point determining subunit comprises at least one of the following subunits:

a first indication determining subunit, configured to determine, as an uplink transmission point of the terminal, a transmission point corresponding to one set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information;

and the first preset determining subunit is configured to determine, as the uplink transmission point of the terminal, a transmission point corresponding to a set of preset CSI-RS configuration information in the multiple sets of CSI-RS configuration information.

22. The terminal of claim 21,

the first indication determining subunit is specifically configured to determine, as an uplink transmission point of the terminal, a transmission point corresponding to an nth set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information, where the nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, or determine, as the uplink transmission point of the terminal, a transmission point corresponding to CSI-RS configuration information sent on one port indicated in the multiple sets of CSI-RS configuration information;

the first preset determining subunit is specifically configured to determine, as an uplink transmission point of the terminal, a transmission point corresponding to an nth set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, where the nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, or determine, as the uplink transmission point of the terminal, a transmission point corresponding to CSI-RS configuration information sent on one port in the multiple sets of CSI-RS configuration information;

23. An uplink communication terminal, comprising:

the determination unit includes:

a main node or main cell determining subunit, configured to determine a transmission point corresponding to one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determine a cell corresponding to the transmission point as a main cell of the terminal;

and a third uplink transmission point determining subunit, configured to determine a transmission point corresponding to the master node or the master cell as an uplink transmission point of the terminal.

24. The terminal according to claim 23, wherein the communication unit comprises:

25. The terminal according to claim 24, wherein the uplink communication subunit is specifically configured to perform uplink communication with the uplink transmission point of the terminal by at least one of the following manners:

26. The terminal of claim 23, wherein the master node or master cell determining subunit comprises at least one of the following subunits:

a second indication determining subunit, configured to determine a transmission point corresponding to one set of CSI-RS configuration information indicated in the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the transmission point as a master cell of the terminal;

and the second preset determining subunit determines a transmission point corresponding to a preset set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a main node of the terminal, or determines a cell corresponding to the transmission point as a main cell of the terminal.

27. The terminal of claim 26,

the second indication determining subunit is specifically configured to determine, as a master node of the terminal, a transmission point corresponding to an nth set of CSI-RS configuration information indicated in the sets of CSI-RS configuration information, or determine, as a master cell of the terminal, a cell corresponding to the transmission point, where the nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the sets of CSI-RS configuration information, or determine, as a master node of the terminal, a transmission point corresponding to CSI-RS configuration information sent on one port indicated in the sets of CSI-RS configuration information, or determine, as a master cell of the terminal, a cell corresponding to the transmission point;

the second preset determining subunit is specifically configured to determine a transmission point corresponding to an nth set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the transmission point as a master cell of the terminal, where the nth set of CSI-RS configuration information is any one set of CSI-RS configuration information in the multiple sets of CSI-RS configuration information, or determine a transmission point corresponding to CSI-RS configuration information sent on one port of the multiple sets of CSI-RS configuration information as a master node of the terminal, or determine a cell corresponding to the transmission point as a master cell of the terminal;

28. The terminal according to any of claims 23-25, wherein the determining unit comprises:

the fourth configuration information receiving subunit is configured to receive at least one set of downlink CSI-RS configuration information sent by a base station, where each set of downlink CSI-RS configuration information corresponds to one downlink transmission point;

the configuration information measuring subunit is used for measuring each downlink CSI-RS corresponding to each set of downlink CSI-RS configuration information to obtain the signal quality or path loss of each downlink transmission point;

and the fourth uplink transmission point determining subunit selects the downlink transmission point with the best signal quality or the downlink transmission point with the minimum path loss as the uplink transmission point of the terminal.