WO2016106700A1

WO2016106700A1 - Communication method and apparatus

Info

Publication number: WO2016106700A1
Application number: PCT/CN2014/095946
Authority: WO
Inventors: 程型清; 吴海; 吴强; 龚政委
Original assignee: 华为技术有限公司
Priority date: 2014-12-31
Filing date: 2014-12-31
Publication date: 2016-07-07
Also published as: CN107113736B; CN107113736A

Abstract

A communication method and apparatus. The method comprises: a base station acquires power parameters of a first user equipment (UE) and a parameter δ_2,ue1, the power parameters of the first UE comprising P_A,ue1 , P_B,ue1 and first reference signal transmit power; the base station sends to the first UE the power parameters of the first UE and the parameter δ_2,ue1; the base station determines first transmit power according to the power parameters of the first UE; and the base station sends a signal to the first UE by using the first transmit power.

Description

Communication method and device

Technical field

The present invention relates to the field of communications, and in particular, to a communication method and apparatus.

Background technique

In the existing LTE (Long Term Evolution) system, the downlink generally employs OFDMA (Orthogonal Frequency Division Multiple Access) technology. In order to effectively improve the throughput of the cell center and the cell edge, NOMA (Non-Orthogonal Multiple Access) technology is a potential candidate technology. When using NOMA for communication, the base station allocates different powers to different user equipments (UEs), but different UEs can use the same frequency resources.

Two or more UEs that communicate with the base station using the same time-frequency resource block are referred to as paired UEs. For example, when using the NOMA technology, UE1 and UE2 use the same time-frequency resource block to communicate with the base station, and UE2 and UE1 are paired UEs. The base station uses different transmit powers to transmit signals to UE1 and UE2. There is interference between the downlink signal of UE1 and the downlink signal of UE2. Downstream usually refers to the direction of the base station to the UE. In order to effectively extract the downlink signal of UE1, UE1 needs to eliminate the interference of the downlink signal of UE2. In the prior art, UE1 cannot obtain related information of downlink signals of UE2, and cannot implement communication by using NOMA technology.

Summary of the invention

Embodiments of the present invention provide a communication method and apparatus, which implement communication by using NOMA technology.

In a first aspect, an embodiment of the present invention provides a base station, which is configured to serve the at least two user equipments, where the at least two UEs include a first UE and a second UE, and includes: a processing unit, configured to determine the a power parameter of the first UE and a parameter δ _{2, ue1} ; wherein the power parameter of the first UE includes: a UE-specific parameter of the first UE

Cell specific parameters of the first UE

And a reference signal transmission power of the first UE, where the parameter δ _{2, ue1} is a parameter related to a ratio of the first transmit power to the second transmit power, where the first transmit power is downlink data of the first UE Transmit power, the second transmit power is the transmit power of the downlink data of the second UE, and the sending unit is configured to send the power parameter of the first UE and the parameter δ ₂ to the first UE _{, The} processing unit is further configured to determine the first transmit power according to the power parameter of the first UE, where the sending unit is further configured to send the downlink of the first UE by using the first transmit power data.

In a first possible implementation manner of the first aspect, the parameter δ _{2, ue1} is a ratio of the first transmit power to the second transmit power; or the parameter δ _{2, ue1} is the first ρ ue1 _UE and _ρ ue2 ratio of the second UE, wherein the _ρ ue1 represents EPRE energy per resource element of the physical downlink shared channel PDSCH of the first UE and the first UE-specific reference cell a ratio of _{EPREs of the} signals, the ρ _ue1 including ρ _{A, ue1} and ρ _{B, ue1} , the ρ _{A, ue1} and ρ _{B, ue1} corresponding to different orthogonal frequency division multiplexing OFDM symbol indexes of the first UE; The ρ _ue2 represents a ratio of an EPRE of a PDSCH of the second UE and an EPRE of a cell-specific reference signal of the second UE, where ρ _ue2 includes ρ _{A, ue2} and ρ _{B, ue2} , the ρ _{A , ue2} and ρ _{B, ue2} correspond to different OFDM symbol indexes of the second UE.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation, the processing unit is further configured to acquire the adjustment parameter δ _{1, ue1 of} the first transmit power; The sending unit is further configured to send, to the first UE, the adjustment parameter δ _{1, ue1 of} the first transmit power _{, where} the processing unit is specifically configured to use, according to the power parameter of the first UE, The first transmit power adjustment parameter δ _{1, ue1} determines the first transmit power.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation, the adjustment parameter δ _{1, ue1} of the first transmit power is an adjustment value of the first transmit power.

With reference to the second possible implementation of the first aspect, in a fourth possible implementation, the processing unit is specifically configured to be used according to the

Said

And the adjustment parameter δ _{1, ue1 of} the first transmit power determines the ρ _{A, ue1} and the ρ _{B, ue1} ; and according to the ρ _{A, ue1} and the ρ _{B, ue1} and the first UE The reference signal transmits power to determine the first transmit power.

With reference to the first possible implementation manner of the first aspect, in a fifth possible implementation, the processing unit is specifically configured to be used according to the foregoing

And said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} , and determining the first transmit power according to the ρ _{A, ue1} and the ρ _{B, ue1} and the reference signal transmit power of the first UE.

With reference to the first aspect, or any one of the foregoing first to fifth possible implementation manners, in a sixth possible implementation, the processing unit is further configured to use, according to the power parameter of the first UE And determining, by the parameter δ _{2, ue1} , the second transmit power; the sending unit is further configured to send the downlink data of the second UE by using the second transmit power.

In a second aspect, the embodiment of the present invention provides a communication method, which is applicable to a communication network that includes at least two user equipments, where the at least two UEs include a first UE and a second UE, and the method includes:

The base station acquires the power parameter of the first UE and the parameter δ _{2, ue1} ; wherein the power parameter of the first UE includes: the UE-specific parameter of the first UE

Cell specific parameters of the first UE

And a reference signal transmission power of the first UE, where the parameter δ _{2, ue1} is a parameter related to a ratio of the first transmit power to the second transmit power, where the first transmit power is downlink data of the first UE Transmit power; the second transmit power is a transmit power of downlink data of the second UE;

Sending, by the base station, the power parameter of the first UE and the parameter δ _{2, ue1} to the first UE;

Determining, by the base station, the first transmit power according to a power parameter of the first UE;

The base station sends the downlink signal of the first UE by using the first transmit power.

In a first possible implementation manner of the second aspect, the parameter δ _{2, ue1} is a ratio of the first transmit power to the second transmit power; or the parameter δ _{2, ue1} is the first ρ ue1 _UE and the second UE ratio _ρ ue2, wherein the _ρ ue1 represents the physical downlink shared channel PDSCH EPRE energy per resource element of the first UE and the first UE to a cell-specific reference signal Ratio of EPRE, the ρ _ue1 includes ρ _{A, ue1} and ρ _{B, ue1} , the ρ _{A, ue1} and ρ _{B, ue1} corresponding to different orthogonal frequency division multiplexing OFDM symbol indexes of the first UE; ρ _ue2 represents a ratio of an EPRE of a PDSCH of the second UE to an EPRE of a cell-specific reference signal of the second UE, the ρ _ue2 including ρ _{A, ue2} and ρ _{B, ue2} , the ρ _{A, Ue2} and ρ _{B, ue2} correspond to different OFDM symbol indexes of the second UE.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner, the method further:

The base station acquires an adjustment parameter δ _{1, ue1 of} the first transmit power; the base station sends an adjustment parameter δ _{1, ue1 of} the first transmit power to the first UE; Determining the first transmit power by the power parameter of the UE includes: determining, by the base station, the first transmit power according to the power parameter of the first UE and the adjustment parameter δ _{1, ue1} of the first transmit power.

With reference to the second possible implementation of the second aspect, in a third possible implementation, the adjustment parameter δ _{1, ue1} of the first transmit power is an adjustment value of the first transmit power.

With reference to the second possible implementation manner of the second aspect, in a fourth possible implementation manner, the base station determines, according to the power parameter of the first UE and the adjustment parameter δ _{1, ue1 of} the first transmit power The first transmit power includes: the base station according to the

Said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} with the adjustment parameter δ _{1, ue1 of} the first transmit power; the base station according to the ρ _{A, ue1} and the ρ _{B, ue1} and the The reference signal of a UE transmits power, and the first transmit power is determined.

With reference to the first possible implementation manner of the second aspect, in a fifth possible implementation, the determining, by the base station, the first transmit power according to the power parameter of the first UE includes:

And said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} ; the base station determines the first transmission according to the ρ _{A, ue1} and the ρ _{B, ue1} and the reference signal transmission power of the first UE power.

With reference to the second aspect, or any one of the first to fifth possible implementation manners of the second aspect, in a sixth possible implementation, the method further includes: the base station according to the power parameter and location of the first UE Determining the second transmission power by using the parameter δ _{2, ue1} ; the base station transmitting the second downlink data by using the second transmission power.

In a third aspect, the embodiment of the present invention provides a first user equipment UE, where the first UE communicates with a base station, the base station serves at least two UEs, and the at least two UEs include the first UE. And a second UE, comprising: a receiving unit, configured to receive a power parameter of the first UE and a parameter δ _{2, ue1} sent by the base station; where the power parameter of the first UE includes: First UE

Cell specific parameters of the first UE

And a reference signal transmission power of the first UE, where the parameter δ _{2, ue1} is a parameter related to a ratio of the first transmit power to the second transmit power, where the first transmit power is downlink data of the first UE Transmit power; the second transmit power is the transmit power of the downlink data of the second UE; the processing unit is configured to determine the first transmit power according to the power parameter of the first UE; the processing unit, The method is further configured to determine the second transmit power according to the power parameter of the first UE and the parameter δ _{2, ue1} ; the receiving unit is further configured to receive a signal sent by the base station, where the received signal includes And the processing unit is further configured to acquire downlink data of the first UE according to the signal that is received by the receiving unit according to the first transmit power and the second transmit power.

In a first possible implementation manner of the third aspect, the parameter δ _{2, ue1} is a _ratio of the first transmit power to the second transmit power; or the parameter δ _{2, ue1} is the first ρ ue1 _UE and _ρ ue2 ratio of the second UE, wherein the _ρ ue1 represents EPRE energy per resource element of the physical downlink shared channel PDSCH of the first UE and the first UE-specific reference cell a ratio of _{EPREs of the} signals, the ρ _ue1 including ρ _{A, ue1} and ρ _{B, ue1} , the ρ _{A, ue1} and ρ _{B, ue1} corresponding to different orthogonal frequency division multiplexing OFDM symbol indexes of the first UE; The ρ _ue2 represents a ratio of an EPRE of a PDSCH of the second UE and an EPRE of a cell-specific reference signal of the second UE, where ρ _ue2 includes ρ _{A, ue2} and ρ _{B, ue2} , the ρ _{A , ue2} and ρ _{B, ue2} correspond to different OFDM symbol indexes of the second UE.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation, the receiving unit is further configured to receive, by the base station, an adjustment parameter of the first transmit power δ _{1, ue1} ; The processing unit is specifically configured to determine the first transmit power according to the power parameter of the first UE and the adjustment parameter δ _{1, ue1} of the first transmit power.

With reference to the second possible implementation of the third aspect, in a third possible implementation, the adjustment parameter δ _{1, ue1} of the first transmit power is an adjustment value of the first transmit power.

With reference to the second possible implementation manner of the third aspect, in a fourth possible implementation, the processing unit is specifically configured to be used according to the foregoing

Said

And said

In a fourth aspect, the embodiment of the present invention provides a communication method, which is applicable to a communication network that includes at least two user equipments, where the at least two UEs include a first UE and a second UE, and the method includes: The UE receives the power parameter of the first UE and the parameter δ _{2, ue1} sent by the base station, where the power parameter of the first UE includes: the first UE

Cell specific parameters of the first UE

And a reference signal transmission power of the first UE, where the parameter δ _{2, ue1} is a parameter related to a ratio of the first transmit power and the second transmit power, where the first transmit power is the first UE The transmit power of the downlink data; the second transmit power is the transmit power of the downlink data of the second UE; the first UE determines the first transmit power according to the power parameter of the first UE; Determining, by the UE _, the second transmit power according to the first transmit power and the parameter δ _{2, ue1} ; the first UE receives a signal sent by the base station, where the received signal includes the first UE Downstream data; the first UE acquires downlink data of the first UE from the received signal according to the first transmit power and the second transmit power.

In a first possible implementation manner of the fourth aspect, the parameter δ _{2, ue1} is a ratio of the first transmit power to the second transmit power; or the parameter δ _{2, ue1} is the first ρ ue1 _UE and _ρ ue2 ratio of the second UE, wherein the _ρ ue1 represents EPRE energy per resource element of the physical downlink shared channel PDSCH of the first UE and the first UE-specific reference cell a ratio of _{EPREs of the} signals, the ρ _ue1 including ρ _{A, ue1} and ρ _{B, ue1} , the ρ _{A, ue1} and ρ _{B, ue1} corresponding to different orthogonal frequency division multiplexing OFDM symbol indexes of the first UE; The ρ _ue2 represents a ratio of an EPRE of a PDSCH of the second UE and an EPRE of a cell-specific reference signal of the second UE, where ρ _ue2 includes ρ _{A, ue2} and ρ _{B, ue2} , the ρ _{A , ue2} and ρ _{B, ue2} correspond to different OFDM symbol indexes of the second UE.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation, the method further includes: receiving, by the first UE, the first transmit power sent by the base station The adjustment parameter δ _{1, ue1} ; determining, by the first UE, the first transmit power according to the power parameter of the first UE, that: the first UE according to the power parameter of the first UE and the first transmit power The adjustment parameter δ _{1, ue1} determines the first transmit power.

With reference to the second possible implementation of the fourth aspect, in a third possible implementation, the adjustment parameter δ _{1, ue1} of the first transmit power is an adjustment value of the first transmit power.

With reference to the second possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the first UE, according to the power parameter of the first UE, and the adjustment parameter of the first transmit power, δ _{1, ue1} Determining the first transmit power includes: the first UE according to the

Said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} with the adjustment parameter δ _{1, ue1 of} the first transmit power; the first UE according to the ρ _{A, ue1} and the ρ _{B, ue1} and Determining the first transmit power by using a reference signal transmit power of the first UE.

With reference to the first possible implementation manner of the fourth aspect, in a fifth possible implementation, the determining, by the first UE, the first transmit power according to the power parameter of the first UE includes: Description

And said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} ; the first UE determines the first according to the ρ _{A, ue1} and the ρ _{B, ue1} and the reference signal transmit power of the first UE A transmit power.

In a fifth aspect, an embodiment of the present invention provides a communication system, including a base station and at least two user equipments, the base station serving the at least two UEs, where the at least two UEs include a first UE and a second The UE is the base station included in the foregoing first aspect, and the first UE is the first UE included in the foregoing third aspect.

In the embodiment of the present invention, the base station acquires the power parameter of the first user equipment UE and the parameter δ _{2, ue1} , and sends the power parameter of the first user equipment UE and the parameter δ _{2, ue1} to the first UE, so that the first UE The first transmit power may be obtained according to the power parameter of the first user equipment UE _, and the second transmit power is determined according to the parameter δ _{2, ue1} and the first transmit power. The first UE can cancel the interference of the downlink data of the second UE according to the second transmit power, and implement communication by using the NOMA technology.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic structural diagram of a network architecture according to an embodiment of the present invention;

2 is a schematic structural diagram of a base station according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of a first UE according to Embodiment 3 of the present invention;

4 is a schematic flowchart of a communication method according to Embodiment 5 of the present invention;

FIG. 5 is a schematic flow chart of a communication method according to Embodiment 7 of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The UE in the embodiment of the present invention may be, for example, a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, or a PDA (Personal Digital Assistant, Personal digital processing), handheld devices with wireless communication capabilities, in-vehicle devices, wearable devices, A computing device or other processing device connected to a wireless modem.

A base station in an embodiment of the invention may, for example, refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame and the network interconnection protocol (English: Internet Protocol, IP for short) into a router between the wireless terminal and the rest of the access network, where the access is performed. The rest of the network may include an IP protocol network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a base station (English: Base Transceiver Station, BTS for short) in GSM (English: Global System for Mobile Communication) or CDMA (Code Division Multiple Access). It can also be a base station in WCDMA (Wideband CDMA, Wideband Code Division Multiple Access) (abbreviation: NodeB), or an evolved base station in LTE (English: evolutional Node B abbreviation: NodeB or eNB or e-NodeB), this It is not limited in the embodiment of the invention.

An embodiment of the present invention discloses a communication method and apparatus, where a base station notifies a first UE of information related to a first transmit power and a second transmit power, and the first UE acquires information related to the first transmit power and the second transmit power, thereby The first UE cancels the interference of the downlink data of the second UE according to the information related to the first transmit power and the second transmit power, and implements communication using NOMA. The first transmit power is the transmit power of the downlink data of the first UE; the second transmit power is the transmit power of the downlink data of the second UE. The details are explained below.

For a better understanding of the present invention, the network architecture used in the embodiments of the present invention will be described below. Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a network architecture according to an embodiment of the present invention. As shown in FIG. 1, the network includes a base station and a UE, and the UE may be two or more. Only the first UE and the second UE are shown in the figure. The first UE and the second UE communicate with the base station by using the same time-frequency resource block, and the downlink data of the first UE and the downlink data of the second UE are different in transmit power. The base station is any one of the base stations in the embodiment of the present invention, and the first UE is any one of the first UEs in the embodiment of the present invention.

Based on the network architecture shown in FIG. 1 , the first embodiment of the present invention discloses a base station, where the base station serves at least two UEs, and the at least two UEs include a first UE and a second UE. Referring to FIG. 2, FIG. 2 is a schematic structural diagram of a base station according to Embodiment 1 of the present invention. As shown in FIG. 2, the base station includes a processing unit 201 and a transmitting unit 202. The processing unit may be a processor, and the sending unit may be a transmitter.

The processing unit 201 is used for the power parameter and the parameter δ _{2, ue1 of the} first user equipment UE;

The sending unit 202 is configured to send the power parameter of the first UE and the parameter δ _{2, ue1} to the first UE;

The processing unit 201 is further configured to determine the first transmit power according to the power parameter of the first UE;

The sending unit 202 is further configured to send downlink data of the first UE by using the first transmit power.

In the embodiment of the present invention, the power parameter of the first UE includes: UE specific parameters of the first UE

Cell specific parameters of the first UE

And a reference signal transmission power of the first UE. The parameter δ _{2, ue1} is a parameter related to a ratio of the first transmit power to the second transmit power, where the first transmit power is a transmit power of downlink data of the first UE; the second transmit power The transmit power of the downlink data of the second UE.

An optional implementation manner,

UE-specific parameters of the first UE provided by the first higher layer,

a cell-specific parameter of the first UE that is provided by the first layer; the first layer is a higher layer of the first UE, and may be a base station of the first UE or another network entity. The P _A of different UEs in the same cell may be different, but the transmit power of P _B and the reference signal are the same.

In an optional implementation manner, the parameter δ _{2, ue1} is a ratio of the first transmit power to the second transmit power.

An alternative embodiment, the parameter δ _{2, ue1} to the first UE _ρ ue1 and _ρ ue2 ratio of the second UE. The ρ _ue1 indicates an energy per resource element (EPRE) of a physical downlink share channel (PDSCH) of the first UE and a cell-specific reference signal of the first UE Ratio of EPRE, the ρ _ue1 includes ρ _{A, ue1} and ρ _{B, ue1} , the ρ _{A, ue1} and ρ _{B, ue1} corresponding to different orthogonal frequency division multiplexing of the first UE (orthogonal frequency division Multiplexing, OFDM) symbol index; the ρ _ue2 represents a ratio of an EPRE of a PDSCH of the second UE and an EPRE of a cell-specific reference signal of the second UE, the ρ _ue2 including ρ _{A, ue2} and ρ _{B , ue2} , the ρ _{A, ue2} and ρ _{B, ue2} correspond to different OFDM symbol indexes of the second UE.

An optional implementation manner, the OFDM symbol index corresponding to the ρ _{A, ue1} and the ρ _{B, ue1} is as shown in Table 1 or Table 2:

Table I

Table II

Where n _s represents a slot index in a radio frame.

In an optional implementation manner, the OFDM symbol index corresponding to the ρ _{A, ue2,} and ρ _{B, ue2} is as shown in Table 3 or Table 4:

Table 3

Table 4

Where n _s represents a slot index in a radio frame.

As an optional implementation manner, the sending unit 202 sends the downlink control information (DCI) to the first UE by using a high layer signaling or a downlink downlink control channel (PDCCH). The power parameter of the first UE and the parameter δ _{2, ue1} .

As an optional implementation manner, the processing unit 201 is configured according to the

And said

Determining the ρ _{A, ue1} and ρ _{B, ue1} , and determining the first transmit power according to the ρ _{A, ue1} and ρ _{B, ue1} and the reference signal transmit power of the first UE.

As an optional implementation manner, the processing unit 201 determines the ρ _{A, ue1} according to the following formula:

The processing unit 201 is specifically configured to determine the ρ _{B, ue1} according to the ρ _{A, ue1} and the fifth table:

Table 5

As an optional implementation manner, the sending unit 202 is further configured to indicate a δ _{power-offset in a} downlink power offset field in a DCI of a PDCCH of the first UE. The downlink power offset domain can occupy one bit. The first UE learns the delta _power-offset through the downlink power offset domain. For example, the downlink power offset domain can be as follows:

Table 6

Downlink power offset fieldDownlink power offset field	δ_power-offset[dB]δ _power-offset [dB]
Downlink power offset fieldDownlink power offset field	δ_power-offset[dB]δ _power-offset [dB]	00	-10log₁₀(2)-10log ₁₀ (2)
11	00	00	-10log₁₀(2)-10log ₁₀ (2)

An optional implementation manner, the processing unit 201 is further configured to determine the second transmit power according to the power parameter of the first UE and the parameter δ _{2, ue1} ; the sending unit 202 is further configured to: Transmitting downlink data of the second UE by using the second transmit power.

An optional implementation, if the parameter δ _{2, ue1} is a ratio of the first transmit power to the second transmit power, the processing unit 201 is configured to use the first transmit power and the parameter δ _{2, ue1} determines the second transmit power. For the determination of the first transmit power, refer to the previous description.

An alternative embodiment, if the parameter δ _{2, ue1} to the first UE _ρ ue1 and _ρ ue2 ratio of the second UE. The ρ _ue1 includes ρ _{A, ue1} and ρ _{B, ue1} , and the ρ _ue2 includes ρ _{A, ue2} and ρ _{B, ue2} . The processing unit 201 for respectively _{2, ue1} determining the ρ _A, ue2 and ρ _B, ue2 according to the _{_{ρ A, ue1, ρ B,}} ue1 , and the parameter δ, and according to the ρ _A, ue2 and ρ _{B, ue2} determines the second transmit power. _For the determination manner of the ρ _{A, ue1} and ρ _{B, ue1} , refer to the previous description. The processing unit 201 is further configured to determine the second transmit power according to the reference signal transmission powers of the ρ _{A, ue1} , ρ _{B, ue1} and the second UE.

A processing unit in the embodiment, the base station 201 acquires a first embodiment of the present invention, the user equipment UE power parameters and parameter δ _2, ue1, and the transmitting unit 202 by a first user equipment UE power parameter and the parameter δ _2, ue1 to a The first UE, so that the first UE can acquire the first transmit power according to the power parameter of the first user equipment UE, and determine the second transmit power according to the parameter δ _{2, ue1} and the first transmit power. The first UE can cancel the interference of the downlink data of the second UE according to the second transmit power, and implement communication by using the NOMA technology.

The second embodiment of the present invention further discloses a base station. The difference between the first embodiment and the second embodiment is that the processing unit 201 is further configured to acquire the adjustment parameter δ _{1, ue1 of} the first transmit power. The sending unit 202 is further configured to send the adjustment parameter δ _{1, ue1 of} the first transmit power to the first UE. The processing unit 201 is specifically configured to determine the first transmit power according to the power parameter of the first UE and the adjustment parameter δ _{1, ue1} of the first transmit power.

In an optional implementation manner, the sending unit 202 sends the adjustment parameter δ _{1, ue1 of} the first transmit power to the first UE by using a downlink control in a higher layer signaling or a physical downlink control channel PDCCH. .

In an optional implementation manner, the adjustment parameter δ _{1, ue1} of the first transmit power is an adjustment value of the first transmit power. The processing unit 201 determines the obtained third transmit power according to the power parameter of the first UE, where the first transmit power is a third transmit power minus or plus an adjustment value of the first transmit power.

As an optional implementation manner, the processing unit 201 determines, according to the power parameter of the first UE, a process of determining the obtained third transmit power, and the processing unit 201 in the first embodiment determines the The process of transmitting power is the same. The processing unit 201 is according to the

And said

Determining ρ _{A, ue1} and ρ _{B, ue1} , and determining the third transmit power according to the ρ _{A, ue1} and the ρ _{B, ue1} and the reference signal transmit power of the first UE.

As an optional implementation manner, when determining the third transmit power, the processing unit 201 is specifically configured to determine the ρ _{A, ue1} according to the following formula:

The processing unit 201 is specifically configured to determine the ρ _{B, ue1} according to the ρ _{A, ue1} and the fifth table.

An optional implementation manner, the processing unit 201 is configured according to the

Said

And the first transmit power adjustment parameter δ _{1, ue1} determines ρ _{A, ue1} and ρ _{B, ue1} ; and according to the ρ _{A, ue1} and the ρ _{B, ue1} and the reference signal of the first UE Power, determining the first transmit power.

An optional implementation manner, the processing unit 201 is specifically configured to: ρ _{A, ue1} according to the following formula:

The processing unit 201 is specifically configured to determine the ρ _{B, ue1} according to the ρ _{A, ue1} and Table 5.

In the second embodiment of the present invention, the processing unit 201 in the base station acquires the adjustment parameter δ _{1, ue1 of} the first transmit power, and sends the adjustment parameter δ _{1, ue1 of} the first transmit power by using the sending unit 202 _. Give the first UE. The base station schedules the first transmit power by using the first transmit power adjustment parameter δ _{1, ue1} to implement dynamic scheduling of the transmit power under the NOMA technology.

Based on the network architecture shown in FIG. 1, the third embodiment of the present invention further discloses a first user equipment UE. The first UE communicates with a base station, the base station serves at least two UEs, and the at least two UEs include the first UE and the second UE. FIG. 3 is a schematic structural diagram of a first UE according to Embodiment 3 of the present invention. As shown in FIG. 3, the first UE may include: a receiving unit 301 and a processing unit 302. The receiving unit may specifically be a receiver, and the processing unit may be a processor.

The receiving unit 301 is configured to receive a power parameter of the first UE and a parameter δ _{2, ue1} sent by the base station.

The processing unit 302 is configured to determine a first transmit power according to a power parameter of the first UE.

The processing unit 302 is further configured to determine a second transmit power according to the power parameter of the first UE and the parameter δ _{2, ue1} .

The receiving unit 301 is further configured to receive a signal sent by the base station, where the received signal includes downlink data of the first UE.

The processing unit 302 is further configured to acquire downlink data of the first UE from the signal received by the receiving unit according to the first transmit power and the second transmit power.

For the specific meaning of related parameters in the embodiment of the present invention, refer to the description of Embodiment 1.

An optional implementation manner, the receiving unit 301 is specifically configured to receive, by the base station, a power parameter of the first UE and a parameter that is sent by using a downlink control indication in a high-level signaling or a physical downlink control channel PDCCH. δ _{2, ue1} .

In an optional implementation manner, the UE determines the first transmit power by using a method similar to the base station in the first embodiment. The processing unit 302 is configured according to the

And said

Determining ρ _{A, ue1} and ρ _{B, ue1} ; and determining the first transmit power according to the ρ _{A, ue1} and the ρ _{B, ue1} and the reference signal transmit power of the first UE. For the meaning of the related parameters, refer to the description in the first embodiment.

An optional implementation manner, the processing unit 302 is specifically configured to: ρ _{A, ue1} according to the following formula:

The processing unit 302 is specifically configured to determine the ρ _{B, ue1} according to the ρ _{A, ue1} and Table 5.

An optional implementation manner, if the parameter δ _{2, ue1} is a ratio of the first transmit power to the second transmit power, the processing unit 302 is configured according to the first transmit power and the parameter δ _{2, Ue1} determines the second transmit power. For the manner of determining the first transmit power, refer to the foregoing description.

An alternative embodiment, if the parameter δ _{2, ue1} to the first UE _ρ ue1 and _ρ ue2 ratio of the second UE. The ρ _ue1 includes ρ _{A, ue1} and ρ _{B, ue1} , and the ρ _ue2 includes ρ _{A, ue2} and ρ _{B, ue2} . The processing unit 302 for respectively _{2, ue1} determining the ρ _A, ue2 and ρ _B, ue2 according to the _{_{ρ A, ue1, ρ B,}} ue1 , and the parameter δ, and according to the ρ _A, ue2 and ρ _{B, ue2} determines the second transmit power. _For the determination manner of the ρ _{A, ue1} and ρ _{B, ue1} , refer to the previous description.

In an optional implementation manner, when the first UE acquires downlink data of the first UE, the first UE needs to use an advanced receiver, such as a maximum likelihood (ML) receiver or a codeword level interference deletion (codeword). Interference cancellation, CWIC) receivers, etc.

When the first UE uses the maximum likelihood receiver, the possible candidate downlink signals of the first UE and the second UE are matched with the received signal, and the soft information of the corresponding bit of the downlink signal of the first UE is determined, in a general sense The downlink signal of the second UE is an interference signal for the first UE, and the transmission constellation of the first UE and the second UE is effectively designed, which can increase the corresponding bit distance of the downlink signal of the first UE, thereby improving transmission. The reliability, such as the composite constellation of the first UE and the second UE, conforms to the Gray mapping and the like. The downlink signal of the first UE carries downlink data of the first UE.

When the first UE uses the CWIC receiver, the downlink signal of the second UE is first demodulated, and then the downlink signal of the second UE is subtracted from the received signal to obtain a downlink signal of the first UE.

The second UE may use the downlink signal of the first UE as interference and directly use an existing conventional receiver.

For example, assume that the channel coefficient corresponding to the first UE is H ₁ and the noise interference is σ ₁ . The channel coefficient corresponding to the second UE is H ₂ and the noise interference is σ ₂ . The first transmit power of the downlink signal X ₁ of the first UE sent by the base station is P ₁ , and the second transmit power of the downlink signal X ₂ of the second UE sent by the base station on the same time-frequency resource is P ₂ . Then, the received signals of the first UE and the second UE are Y ₁ and Y ₂ respectively, which are respectively expressed as:

For the first UE, the received received signal Y _{1 is} obtained by channel estimation and noise estimation, respectively, by obtaining channel H ₁ and interference σ ₁ according to powers P ₁ and P ₂ ; and then preferentially solving the downlink signal X of the second UE. _2. According to the above formula, the first UE may solve the downlink signal X ₁ of the first UE.

It should be noted that in the above process of solving the downlink signal X ₁ of the first UE, the first UE can preferentially solve X ₂ and then subtract X ₂ to obtain a more accurate estimation of X ₁ because the first The signal-to-noise ratio of the UE is higher than that of the second UE, so the first UE can correctly solve the downlink signal X ₂ of the second UE. Therefore, for the second UE, since the downlink signal X _{1 of the} second UE cannot be correctly solved, X ₂ can be directly solved according to the following formula:

In the third embodiment of the present invention, the receiving unit 301 of the first UE receives the power parameter of the first UE and the parameter δ _{2, ue1} sent by the base station _, and the processing unit 302 of the first UE acquires the first transmission according to the power parameter of the first user equipment UE. Power, and determining the second transmit power based on the parameters δ _{2, ue1} and the first transmit power. The first UE can eliminate the interference of the signal of the second UE according to the second transmit power, and implement communication by using the NOMA technology.

The first UE of the fourth embodiment of the present invention is different from the fourth embodiment. The receiving device 301 of the first UE is further configured to receive the adjustment parameter δ _{1, ue1} of the first transmit power sent by the base station _. . The processing unit 302 is specifically configured to determine the first transmit power according to the power parameter of the first UE and the adjustment parameter δ _{1, ue1} of the first transmit power.

An optional implementation manner, the receiving device 301 is specifically configured to receive, by the base station, the adjustment parameter δ _{1, ue1} of the first transmit power that is sent by the DCI in the high layer signaling or the PDCCH.

In an optional implementation manner, the adjustment parameter δ _{1, ue1} of the first transmit power is an adjustment value of the first transmit power. The processing unit 302 is specifically configured to determine, according to the power parameter of the first UE, a third transmit power, where the first transmit power is a third transmit power minus or plus an adjustment value of the first transmit power. .

As an optional implementation manner, the processing unit 302 is specifically configured to be used according to the

And said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} ; and determining the third transmit power according to the ρ _{A, ue1} and the ρ _{B, ue1} and the reference signal transmit power of the first UE.

As an optional implementation manner, when determining the third transmit power, the processing unit 302 is specifically configured to: ρ _{A, ue1} according to the following formula:

An optional implementation manner, the processing unit 302 is specifically configured to be used according to the

Said

An optional implementation manner, the processing unit 302 is specifically configured to determine the ρ _{A, ue1} according to the following formula:

The processing unit 302 determines the ρ _{B, ue1} according to the ρ _{A, ue1} and Table 5.

In the fourth embodiment of the present invention, the receiving unit 301 of the first UE receives the adjustment parameter δ _{1, ue1} of the first transmit power sent by the base station. The base station schedules the transmit power by using the first transmit power adjustment parameter δ _{1, ue1} to implement dynamic scheduling of the transmit power under the NOMA technology.

Based on the network architecture shown in FIG. 1, a fifth embodiment of the present invention discloses a communication method. Please refer to Figure 4, Figure 4 is A schematic flowchart of a communication method disclosed in Embodiment 5 of the present invention. The method shown in FIG. 4 is applicable to a communication network including at least two user equipment UEs, and the at least two UEs include a first UE and a second UE. As shown in FIG. 4, the communication method may include the following steps:

401. The base station acquires a power parameter and a parameter δ _{2, ue1 of the} first UE.

402. The base station sends, to the first UE, a power parameter of the first UE and the parameter δ _{2, ue1} ;

403. The base station determines the first transmit power according to the power parameter of the first UE.

404. The base station sends the downlink signal of the first UE by using the first transmit power.

The power parameter of the first UE includes: UE specific parameters of the first UE

Cell specific parameters of the first UE

And a reference signal transmission power of the first UE. The parameter δ _{2, ue1} is a parameter related to a ratio of the first transmit power to the second transmit power, where the first transmit power is a transmit power of downlink data of the first UE; the second transmit power The transmit power of the downlink data of the second UE. For a description of the related parameters in the embodiment of the present invention, refer to the related description in the first embodiment.

As an optional implementation manner, in step 402, the base station sends the power parameter of the first UE and the parameter δ _{2, ue1} to the first UE by using high layer signaling or DCI in the PDCCH.

As an optional implementation manner, in step 403, the base station is configured according to the

And said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} ; the base station determines the first transmit power according to the ρ _{A, ue1} and the ρ _{B, ue1} and the first reference signal transmission power.

As an optional implementation manner, the base station is according to the

And said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} include:

The base station determines the ρ _{A, ue1} according to the following formula:

The base station determines the ρ _{B, ue1} according to the ρ _{A, ue1} and Table 5 _{, respectively} .

As an optional implementation manner, the base station indicates a delta _{power-offset in a} downlink power offset field in a DCI of a PDCCH of the first UE. The downlink power offset domain can occupy one bit. The first UE learns the delta _power-offset through the downlink power offset domain. The downlink power offset domain can be as shown in Table 6.

An optional implementation manner, the method further includes: determining, by the base station, the second transmit power according to the power parameter of the first UE and the parameter δ _{2, ue1} ; Transmit power transmits downlink data of the second UE.

An optional implementation manner, if the parameter δ _{2, ue1} is a ratio of the first transmit power to the second transmit power, the base station root according to the first transmit power and the parameter δ _{2, ue1} The second transmit power is determined. For the determination of the first transmit power, refer to the previous description.

An alternative embodiment, if the parameter δ _{2, ue1} to the first UE _ρ ue1 and _ρ ue2 ratio of the second UE. The ρ _ue1 includes ρ _{A, ue1} and ρ _{B, ue1} , and the ρ _ue2 includes ρ _{A, ue2} and ρ _{B, ue2} . The base station respectively according to the _{_{ρ A, ue1, ρ B,}} ue1 , and the parameter δ _2, ue1 determining the ρ _A, ue2 and ρ _{B, ue2,} and according to the ρ _A, ue2 and ρ _B, ue2 The second transmit power is determined. _For the determination manner of the ρ _{A, ue1} and ρ _{B, ue1} , refer to the previous description. The base station further determines the second transmit power according to the ρ _{A, ue1} , ρ _{B, ue1} and the reference signal transmit power of the second UE.

In the fifth embodiment of the present invention, the base station acquires the power parameter of the first UE and the parameter δ _{2, ue1} , and sends the power parameter of the first UE and the parameter δ _{2, ue1} to the first UE, so that the first UE can be A power parameter of a UE acquires a first transmit power, and determines a second transmit power according to the parameter δ _{2, ue1} and the first transmit power. The first UE can cancel the interference of the downlink data of the second UE according to the second transmit power, and implement communication by using the NOMA technology.

The communication method of the sixth embodiment of the present invention is further disclosed. The difference between the sixth embodiment and the fifth embodiment is that the base station further acquires the adjustment parameter δ _{1, ue1 of} the first transmit power, and adjusts the first transmit power. The parameter δ _{1, ue1 is} sent to the first UE. In step 403, the base station determines the first transmit power according to the power parameter of the first UE and the adjustment parameter δ _{1, ue1} of the first transmit power. For the meaning of related parameters, refer to the fifth embodiment.

In an optional implementation manner, the base station sends the adjustment parameter δ _{1, ue1 of} the first transmit power to the first UE by using high layer signaling or DCI in the PDCCH.

In an optional implementation manner, the adjustment parameter δ _{1, ue1} of the first transmit power is an adjustment value of the first transmit power. The base station determines the obtained third transmit power according to the power parameter of the first UE, where the first transmit power is a third transmit power minus or plus an adjustment value of the first transmit power.

In an optional implementation manner, the process of determining, by the base station, the obtained third transmit power according to the power parameter of the first UE may be the same as the process of determining, by the base station in the fifth embodiment, the first transmit power. The base station according to the

And said

In an optional implementation manner, when the base station determines the third transmit power, the base station is configured according to the

And said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} include:

The base station determines the ρ _{B, ue1} according to the ρ _{A, ue1} and Table 5.

An optional implementation manner, the base station according to the

Said

An optional implementation manner, the base station according to the

Said

And determining _, by the adjustment parameter δ _{1, ue1 of} the first transmit power _, the ρ _{A, ue1} and the ρ _{B, ue1} include:

The base station according to the following formula ρ _{A, ue1} :

Sixth embodiment of the present invention embodiment, the first base station acquires the transmission power adjustment parameter δ _{1, ue1,} and transmits a first adjustment parameter δ of the transmission power of _{1, ue1} to the first UE. The base station schedules the transmit power by using the first transmit power adjustment parameter δ _{1, ue1} to implement dynamic scheduling of the transmit power under the NOMA technology.

Based on the network architecture shown in FIG. 1, a seventh embodiment of the present invention further discloses a communication method. Referring to FIG. 5, FIG. 5 is a schematic flowchart diagram of a communication method according to Embodiment 7 of the present invention. The method is applicable to a communication network including at least two user equipment UEs, where the at least two UEs include a first UE and a second UE. As shown in FIG. 5, the communication method may include the following steps:

501. The first user equipment UE receives the power parameter of the first UE and the parameter δ _{2, ue1} sent by the base station.

502. The first UE determines the first transmit power according to a power parameter of the first UE.

503. The first UE determines the second transmit power according to the first transmit power and the parameter δ _{2, ue1} .

504. The first UE receives a signal sent by the base station, where the received signal includes downlink data of the first UE.

505. The first UE acquires downlink data of the first UE from the received signal according to the first transmit power and the second transmit power.

UE specific parameters of the first UE

Cell specific parameters of the first UE

In an optional implementation manner, in step 501, the first UE receives a power parameter and a location of the first UE that is sent by the base station by using a downlink control in a higher layer signaling or a physical downlink control channel PDCCH. The parameter δ _{2, ue1} .

In an optional implementation manner, in step 502, the first UE determines the first transmit power by using a method similar to the base station in the fifth embodiment. The first UE according to the

And said

Determining ρ _{A, ue1} and ρ _{B, ue1} ; the base station determines the first transmit power according to the ρ _{A, ue1} and the ρ _{B, ue1} and the reference signal transmit power of the first UE. For details, refer to the description in the first embodiment.

An optional implementation manner, the first UE is according to the

And said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} include:

The first UE determines the ρ _{A, ue1} according to the following formula:

The first UE determines the ρ _{B, ue1} according to the ρ _{A, ue1} and the fifth table.

As an optional implementation manner, the first UE receives, by the base station, a PDCCH of the first UE, where the first UE acquires a δ _{power-offset from a} downlink power offset field in the DCI in the PDCCH. . For example, the downlink power offset domain can be as shown in Table 6. The downlink power offset domain is one bit.

An optional implementation manner, in step 503, the determining, by the first UE _{, the} second transmit power according to the power parameter of the first UE and the parameter δ _{2, ue1} includes:

If the parameter δ _{2, ue1} is the _ratio of the first transmit power to the second transmit power, the first UE determines the second transmit power according to the first transmit power and the parameter δ _{2, ue1} . For the manner of determining the first transmit power, refer to the foregoing description. or,

If the parameter δ _{2, ue1} is the ratio of ρ _ue1 of the first UE to the ρ _{ue2 of} the second UE. The ρ _ue1 includes ρ _{A, ue1} and ρ _{B, ue1} , and the ρ _ue2 includes ρ _{A, ue2} and ρ _{B, ue2} . The UE respectively according to the first _{_{ρ A, ue1, ρ B,}} ue1 , and the parameter δ _2, ue1 determining the ρ _A, ue2 and ρ _{B, ue2,} and according to the ρ _A, ue2 and ρ _{B , ue2} determines the second transmit power. _For the determination manner of the ρ _{A, ue1} and ρ _{B, ue1} , refer to the previous description.

In an optional implementation manner, in step 504, when the first UE receives the signal sent by the base station, the first UE needs to use an advanced receiver, such as a maximum likelihood (ML) receiver or a codeword level interference. Deletion (codeword interference cancellation, CWIC) receiver, etc.

When the first UE uses the CWIC receiver, the downlink signal of the second UE is first demodulated, and then the received signal is received. The downlink signal of the second UE is subtracted, and the downlink signal of the first UE is obtained.

In an optional implementation manner, in step 505, the first UE acquires downlink data of the first UE from the received signal according to the first transmit power and the second transmit power.

In the seventh embodiment of the present invention, the first UE receives the power parameter of the first UE and the parameter δ _{2, ue1} , and the first UE acquires the first transmit power according to the power parameter of the first user equipment UE, and according to the parameter δ _{2, Ue1} and the first transmit power determine the second transmit power. The first UE can eliminate the interference of the signal of the second UE according to the second transmit power, and implement communication by using the NOMA technology.

A communication method is disclosed in Embodiment 8 of the present invention. The difference between Embodiment 8 and Embodiment 7 is that the first UE receives the adjustment parameter δ _{1, ue1} of the first transmit power sent by the base station. The first UE determines the first transmit power according to the power parameter of the first UE and the adjustment parameter δ _{1, ue1} of the first transmit power.

In an optional implementation manner, the first UE receives the adjustment parameter δ _{1, ue1} of the first transmit power that is sent by the base station by using the high layer signaling or the DCI in the PDCCH.

In an optional implementation manner, the adjustment parameter δ _{1, ue1} of the first transmit power is an adjustment value of the first transmit power. Determining _, by the first UE, the first transmit power according to the power parameter of the first UE and the adjustment parameter δ _{1, ue1} of the first transmit power, that: the first UE is determined according to a power parameter of the first UE And obtaining a third transmit power, where the first transmit power is a third transmit power minus or plus an adjustment value of the first transmit power.

An optional implementation manner, where the first UE is specifically according to the

And said

Determining the ρ _{A, ue1} and the ρ _{B, ue1} ; the first UE determines the first according to the ρ _{A, ue1} and the ρ _{B, ue1} and the reference signal transmit power of the first UE Three transmit power.

As an optional implementation manner, when determining the third transmit power, the first UE determines the ρ _{A, ue1} according to the following formula:

Here, the manner of determining the third power can be referred to the manner of determining the first transmit power in Embodiment 15.

An optional implementation manner, the first UE is according to the

Said

Said And determining _, by the adjustment parameter δ _{1, ue1 of} the first transmit power _, the ρ _{A, ue1} and the ρ _{B, ue1} include:

The first UE determines the ρ _{A, ue1} according to the following formula:

The first UE determines the ρ _{B, ue1} according to the ρ _{A, ue1} and Table 5.

As an optional implementation manner, the first UE receives a δ _power-offset indicated by a downlink power offset field in a DCI of the PDCCH of the first UE by the base station. For example, the downlink power offset domain can be as follows.

In the seventh embodiment of the present invention, the first UE receives the adjustment parameter δ _{1, ue1} of the first transmit power sent by the base station. The base station schedules the transmit power by using the first transmit power adjustment parameter δ _{1, ue1} to implement dynamic scheduling of the transmit power under the NOMA technology.

In the several embodiments provided herein, it should be understood that the disclosed apparatus and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. Should be covered It is within the scope of the invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

A base station, serving at least two user equipment UEs, where the at least two UEs include a first UE and a second UE, and the method includes:

a processing unit, configured to determine a power parameter and a parameter δ 2, ue1 of the first UE, where the power parameter of the first UE includes: a UE-specific parameter of the first UE
Cell specific parameters of the first UE
And a reference signal transmission power of the first UE, where the parameter δ 2, ue1 is a parameter related to a ratio of the first transmit power to the second transmit power, where the first transmit power is downlink data of the first UE Transmit power; the second transmit power is a transmit power of downlink data of the second UE;

a sending unit, configured to send, to the first UE, a power parameter of the first UE and the parameter δ 2, ue1 ;

The processing unit is further configured to determine the first transmit power according to the power parameter of the first UE;

The sending unit is further configured to send downlink data of the first UE by using the first transmit power.
The base station according to claim 1, wherein said parameter δ 2, ue1 is a ratio of said first transmit power to a second transmit power; or

The parameter δ 2, ue1 ρ ue1 said first ratio ρ ue2 UE and the second UE, wherein, the resource element ρ ue1 represents the energy physical downlink shared channel (PDSCH) in each of the first UE a ratio of an EPRE and an EPRE of a cell-specific reference signal of the first UE, the ρ ue1 including ρ A, ue1 and ρ B, ue1 , the ρ A, ue1 and ρ B, ue1 corresponding to the first UE Different orthogonal frequency division multiplexing OFDM symbol indices; the ρ ue2 represents a ratio of an EPRE of a PDSCH of the second UE and an EPRE of a cell-specific reference signal of the second UE, the ρ ue2 including ρ A , ue2 and ρ B, ue2 , the ρ A, ue2 and ρ B, ue2 correspond to different OFDM symbol indexes of the second UE.
A base station according to claim 1 or 2, characterized in that

The processing unit is further configured to acquire the adjustment parameter δ 1, ue1 of the first transmit power;

The sending unit is further configured to send, to the first UE, the adjustment parameter δ 1, ue1 of the first transmit power;

The processing unit is specifically configured to determine the first transmit power according to the power parameter of the first UE and the adjustment parameter δ 1, ue1 of the first transmit power.
The base station according to claim 3, wherein the adjustment parameter δ 1, ue1 of the first transmission power is an adjustment value of the first transmission power.
The base station according to claim 3, wherein the processing unit is specifically configured to perform according to the
Said
And the adjustment parameter δ 1, ue1 of the first transmit power determines the ρ A, ue1 and the ρ B, ue1 ; and according to the ρ A, ue1 and the ρ B, ue1 and the first UE The reference signal transmits power to determine the first transmit power.
The base station according to claim 5, wherein the processing unit is specifically configured to determine the ρ A, ue1 according to the following formula:

The processing unit is specifically configured to determine the ρ B, ue1 according to the ρ A, ue1 and a table as follows:
The base station according to claim 2, wherein the processing unit is specifically configured to perform according to the
And said
Determining the ρ A, ue1 and the ρ B, ue1 , and determining the first transmit power according to the ρ A, ue1 and the ρ B, ue1 and the reference signal transmit power of the first UE.
The base station according to claim 7, wherein the processing unit is specifically configured to determine the ρ A, ue1 according to the following formula:

The processing unit is specifically configured to determine the ρ B, ue1 according to the ρ A, ue1 and a table as follows:
The base station according to any one of claims 1 to 8, wherein the processing unit is further configured to determine the second transmission according to the power parameter of the first UE and the parameter δ 2, ue1 power;

The sending unit is further configured to send downlink data of the second UE by using the second transmit power.
A communication method is applicable to a communication network that includes at least two user equipments, the at least two UEs, including the first UE and the second UE, including:

The base station acquires the power parameter of the first UE and the parameter δ 2, ue1 ; wherein the power parameter of the first UE includes: the UE-specific parameter of the first UE
Cell specific parameters of the first UE
And a reference signal transmission power of the first UE, where the parameter δ 2, ue1 is a parameter related to a ratio of the first transmit power to the second transmit power, where the first transmit power is downlink data of the first UE Transmit power; the second transmit power is a transmit power of downlink data of the second UE;

Sending, by the base station, the power parameter of the first UE and the parameter δ 2, ue1 to the first UE;

Determining, by the base station, the first transmit power according to a power parameter of the first UE;

The base station sends the downlink signal of the first UE by using the first transmit power.
The method according to claim 10, wherein said parameter δ 2, ue1 is a ratio of said first transmit power to a second transmit power; or

The parameter δ 2, ue1 ρ ue1 said first ratio ρ ue2 UE and the second UE, wherein the ρ ue1 represents the physical downlink shared channel PDSCH EPRE Energy per resource element of the first UE a ratio of the EPRE of the cell-specific reference signal of the first UE, where ρ ue1 includes ρ A, ue1 and ρ B, ue1 , the ρ A, ue1 and ρ B, ue1 corresponding to the first UE Different orthogonal frequency division multiplexing OFDM symbol indexes; the ρ ue2 represents a ratio of an EPRE of a PDSCH of the second UE and an EPRE of a cell-specific reference signal of the second UE, where ρ ue2 includes ρ A, Ue2 and ρ B, ue2 , the ρ A, ue2 and ρ B, ue2 correspond to different OFDM symbol indexes of the second UE.
The method of claim 10 or 11, further comprising:

The base station acquires an adjustment parameter δ 1, ue1 of the first transmit power;

Sending, by the base station, the adjustment parameter δ 1, ue1 of the first transmit power to the first UE;

Determining, by the base station, the first transmit power according to the power parameter of the first UE, the determining, by the base station, the first, according to the power parameter of the first UE and the adjustment parameter δ 1, ue1 of the first transmit power Transmit power.
The method according to claim 12, wherein the adjustment parameter δ 1, ue1 of the first transmission power is an adjustment value of the first transmission power.
The method according to claim 13, wherein the determining, by the base station, the first transmit power according to the power parameter of the first UE and the adjustment parameter δ 1, ue1 of the first transmit power comprises: Base station according to the
Said
And determining the ρ A, ue1 and the ρ B, ue1 by the adjustment parameter δ 1, ue1 of the first transmit power;

The base station determines the first transmit power according to the ρ A, ue1 and the ρ B, ue1 and the reference signal transmit power of the first UE.
The method of claim 14 wherein said base station is in accordance with said
Said
And determining , by the adjustment parameter δ 1, ue1 of the first transmit power , the ρ A, ue1 and the ρ B, ue1 include:

The base station determines the ρ A, ue1 according to the following formula:

The base station determines the ρ B, ue1 according to the ρ A, ue1 and the following table:
The method according to claim 11, wherein the determining, by the base station, the first transmit power according to the power parameter of the first UE comprises:

The base station according to the
And said
Determining the ρ A, ue1 and the ρ B, ue1 ;

The base station determines the first transmit power according to the ρ A, ue1 and the ρ B, ue1 and the reference signal transmit power of the first UE.
The method of claim 16 wherein said base station is in accordance with said
And said
Determining the ρ A, ue1 and the ρ B, ue1 include:

The base station determines the ρ A, ue1 according to the following formula:

The base station determines the ρ B, ue1 according to the ρ A, ue1 and a table as follows:
The method according to any one of claims 10-17, further comprising: the base station determining the second transmit power according to the power parameter of the first UE and the parameter δ 2, ue1 ;

The base station sends downlink data of the second UE by using the second transmit power.
a first user equipment UE, the first UE is in communication with a base station, the base station is serving at least two UEs, and the at least two UEs include the first UE and the second UE, and is characterized by including :

a receiving unit, configured to receive the power parameter of the first UE and the parameter δ 2, ue1 sent by the base station, where the power parameter of the first UE includes: the first UE
Cell specific parameters of the first UE
And a reference signal transmission power of the first UE, where the parameter δ 2, ue1 is a parameter related to a ratio of the first transmit power to the second transmit power, where the first transmit power is downlink data of the first UE Transmit power; the second transmit power is a transmit power of downlink data of the second UE;

a processing unit, configured to determine the first transmit power according to a power parameter of the first UE;

The processing unit is further configured to determine the second transmit power according to the power parameter of the first UE and the parameter δ 2, ue1 ;

The receiving unit is further configured to receive a signal sent by the base station, where the received signal includes downlink data of the first UE;

The processing unit is further configured to acquire downlink data of the first UE according to the signal that is received by the receiving unit according to the first transmit power and the second transmit power.
The first UE according to claim 19, wherein the parameter δ 2, ue1 is a ratio of the first transmit power to the second transmit power; or

The parameter δ 2, ue1 ρ ue1 said first ratio ρ ue2 UE and the second UE, wherein, the resource element ρ ue1 represents the energy physical downlink shared channel (PDSCH) in each of the first UE a ratio of an EPRE and an EPRE of a cell-specific reference signal of the first UE, the ρ ue1 including ρ A, ue1 and ρ B, ue1 , the ρ A, ue1 and ρ B, ue1 corresponding to the first UE Different orthogonal frequency division multiplexing OFDM symbol indices; the ρ ue2 represents a ratio of an EPRE of a PDSCH of the second UE and an EPRE of a cell-specific reference signal of the second UE, the ρ ue2 including ρ A , ue2 and ρ B, ue2 , the ρ A, ue2 and ρ B, ue2 correspond to different OFDM symbol indexes of the second UE.
A first UE according to claim 19 or 20, characterized in that

The receiving unit is further configured to receive the adjustment parameter δ 1, ue1 of the first transmit power sent by the base station;

The processing unit is specifically configured to determine the first transmit power according to the power parameter of the first UE and the adjustment parameter δ 1, ue1 of the first transmit power.
The first UE according to claim 21, wherein the adjustment parameter δ 1, ue1 of the first transmit power is an adjustment value of the first transmit power.
The first UE according to claim 21, wherein the processing unit is specifically configured to perform according to the
Said
And the adjustment parameter δ 1, ue1 of the first transmit power determines the ρ A, ue1 and the ρ B, ue1 ; and according to the ρ A, ue1 and the ρ B, ue1 and the first UE The reference signal transmits power to determine the first transmit power.
The first UE according to claim 23, wherein the processing unit is specifically configured to determine the ρ A, ue1 according to the following formula:

The processing unit is specifically configured to determine the ρ B, ue1 according to the ρ A, ue1 and a table as follows:
The first UE according to claim 20, wherein the processing unit is specifically configured to perform according to the
And said
Determining the ρ A, ue1 and the ρ B, ue1 , and determining the first transmit power according to the ρ A, ue1 and the ρ B, ue1 and the reference signal transmit power of the first UE.
The first UE according to claim 25, wherein the processing unit is specifically configured to determine the ρ A, ue1 according to the following formula:

The processing unit is specifically configured to determine the ρ B, ue1 according to the ρ A, ue1 and a table as follows:
A communication system, comprising: a base station and at least two user equipments, the base station serving the at least two UEs, the at least two UEs comprising a first UE and a second UE, wherein the base station is The base station according to any one of claims 1 to 9, wherein the first UE is the first UE according to any one of claims 19-26.