WO2016149916A1

WO2016149916A1 - Data transmission method and apparatus

Info

Publication number: WO2016149916A1
Application number: PCT/CN2015/075036
Authority: WO
Inventors: 庄宏成; 罗泽宙
Original assignee: 华为技术有限公司
Priority date: 2015-03-25
Filing date: 2015-03-25
Publication date: 2016-09-29

Abstract

A data transmission method, comprising: determining a connection mode of a user terminal in a network, wherein the connection mode comprises a multiple connection state and a single connection state; according to the number of different connection modes of the user terminal or business requirements, dividing a system frequency spectrum into a multiple connection frequency band and a single connection frequency band; allocating the multiple connection frequency band to the multiple connection state of the user terminal to carry out data transmission, and allocating the single connection frequency band to the single connection state of the user terminal to carry out data transmission, wherein different transmission modes are used to carry out data transmission for different connection modes of a user terminal, thus reducing interference during the process of data transmission, and improving the efficiency of data transmission.

Description

Method and device for data transmission

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for data transmission in a wireless communication network.

Background technique

In order to improve the network capacity, the miniaturization and deployment of wireless network access points is the development trend of wireless networks. The intensive wireless access network (UDN) allows user terminals to access as short as possible, and enhance users. Terminal throughput and regional throughput of the system.

The dense deployment of wireless access points leads to a large number of overlapping areas in the wireless network. A large number of user terminals are in these overlapping areas, resulting in increased interference in the neighboring areas, increased interference cells, and interference between user terminals. serious.

After the deployment of wireless network access points is intensive, the dynamic changes of the network are enhanced, which makes the interference management more difficult.

Traditional interference management can be based on time domain, frequency domain and airspace, etc., to avoid interference by orthogonality in these domains. Static orthogonal methods can't match the dynamic changes of the network, sacrificing the utilization of resources, and the dynamic orthogonal method brings a lot of signaling overhead.

In dense wireless networks, the dynamic changes of system interference are enhanced. Therefore, in the data transmission process, a more flexible and effective interference management mechanism is needed to improve the efficiency of data transmission.

Summary of the invention

The invention provides a method and a device for data transmission, so as to reduce interference in the data transmission process and improve the efficiency of data transmission.

The technical solution adopted by the invention is:

In a first aspect, the present invention provides a data transmission method, including:

Determining a connection mode of the user terminal in the network, the connection mode including multiple connection states and single connection Connected state

Dividing the system spectrum into a multi-connection frequency band and a single connection frequency band according to the number of user terminals or service requirements of different connection modes;

Allocating the multi-connection frequency band to a multi-connected user terminal for data transmission, and allocating the single connection frequency band to a single-connected user terminal for data transmission; wherein:

Data transmission is performed by applying different transmission modes to user terminals of different connection modes.

Based on the first aspect, determining a connection mode of the user terminal in the network includes:

Receiving pilot information of the serving cell and the neighboring cell measured and reported by the user terminal;

Receiving connection capability information of the user terminal reported by the user terminal;

If the user terminal supports the multi-connected state, and the pilot signal strength difference of the at least two cells is less than the preset threshold, determining that the connection mode of the user terminal is a multi-connected state, otherwise, the single-connected state;

or

Receiving neighboring area interference information measured and reported by the user terminal;

If the user terminal supports the multi-connection state, and the neighboring cell interference is greater than the preset threshold, it is determined that the connection mode of the user terminal is a multi-connected state, otherwise, the single-connected state.

Based on the above aspects, the system spectrum is divided into a multi-connection frequency band and a single connection frequency band according to the number of terminals or service requirements of different connection modes, including:

Determine the total number of multi-connected user terminals or the total amount of business requirements in the network;

Determine the total number of connected user terminals or the total amount of business requirements in the network;

Determining the multi-connection band bandwidth according to the total number of multi-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total amount of service demand, and the total bandwidth of the system;

Determining a single connected band bandwidth according to the total bandwidth of the system and the bandwidth of the multi-connection band;

or

Determine the total number of single-connected user terminals or the total amount of business requirements in the network;

Determining a single connection band bandwidth according to the total number of single-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total amount of service requirements, and the total system bandwidth;

Determining the multi-connection band bandwidth according to the total bandwidth of the system and the bandwidth of the single connection band;

or

The multi-connection band bandwidth and the single-connection band bandwidth are respectively determined according to the ratio of the total number of multi-connected user terminals or the total service demand to the total number of single-connected user terminals or the total service demand and the total system bandwidth.

Based on the above aspects, different transmission modes are adopted for terminals of different connection modes for data transmission, including:

Data transmission is performed for a multi-connected user terminal to apply a multi-point transmission mode;

Data transmission is performed for a mode in which a single-connected user terminal applies a silent transmission.

Based on the foregoing aspects, data transmission for a multi-connected user terminal applying a multi-point transmission mode includes:

The serving cell and the neighboring cell simultaneously transmit data with the multi-connected user terminal;

or,

When the serving cell and the neighboring cell are jointly scheduled, and the serving cell and the multi-connected user terminal perform data transmission, the neighboring cell staggers the transmission resource to avoid interference to the multi-connected user terminal of the serving cell;

or,

When the serving cell and the multi-connected user terminal perform data transmission, the multi-connected user terminal acquires interference signal configuration information of the neighboring cell, and performs interference cancellation according to the interference signal configuration information.

Based on the foregoing aspects, data transmission for a mode in which a single-connected user terminal applies a silent transmission includes:

When the single-connected user terminal in the neighboring cell is interfered by the serving cell by more than a preset threshold, the serving cell performs data transmission with zero power or low power according to the silence duration and the silence pattern negotiated with the neighboring cell.

Based on the above aspects, the method further includes:

And determining, by the serving cell, the user association parameter of the serving cell, and sending the user association parameter to the single-connected user terminal, so that the single-connected user terminal is associated with the user according to the user. The parameters determine whether to reselect the appropriate cell for data transmission.

Based on the above aspects, the method further includes determining a maximum transmit power of the single connected band or the multi-connected band.

Based on the above aspects, determining the maximum transmit power of the single-connected band or the multi-connected band includes:

Dividing a single connected band or a multi-connected band into multiple sub-bands;

Receiving a power gradient of each sub-band transmitted by the neighboring cell to the serving cell;

Calculating, according to the power gradient of the serving cell, the power adjustment amount of each subband of the serving cell according to each of the subbands;

Determining, according to a power adjustment amount of each subband of the serving cell, a transmit power of each subband of the serving cell;

The sum of the transmission powers of the sub-bands of the serving cell is calculated, and the maximum transmission power of the single-connected frequency band or the multi-connection frequency band of the serving cell is obtained.

In another aspect, the present disclosure provides a wireless communication network device, including:

a determining module: configured to determine a connection mode of a user terminal in the network, where the connection mode includes a multi-connected state and a single connected state;

Frequency division module: used to divide the system spectrum into a multi-connection frequency band and a single connection frequency band according to the number of user terminals or service requirements of different connection modes;

a transmission module: configured to allocate the multi-connection frequency band to a multi-connected user terminal for data transmission, and allocate the single connection frequency band to a single-connected user terminal for data transmission;

among them:

The transmission module is also used to apply different transmission modes for data transmission for user terminals of different connection modes.

Based on the above aspects, the determining module includes:

a receiving module: receiving pilot information of a serving cell and a neighboring cell that is measured and reported by the user terminal; and receiving connection capability information of the user terminal reported by the user terminal;

a judging module, configured to: if the user terminal supports a multi-connection state, and the pilot signal strength difference of the at least two cells is less than a preset threshold, determining that the connection mode of the user terminal is a multi-connected state, otherwise, the single-connected state ;

or

a receiving module: receiving neighboring cell interference information measured and reported by the user terminal; and receiving connection capability information of the user terminal reported by the user terminal;

The judging module is configured to: if the user terminal supports the multi-connection state, and the neighboring cell interference is greater than the preset threshold, determine that the connection mode of the user terminal is a multi-connected state, otherwise, the single-connected state.

Based on the above aspects, the frequency division module includes:

The statistics module is used to determine the total number of multi-connected user terminals or the total amount of service requirements in the network; and determine the total number of connected user terminals or the total amount of service requirements in the network;

The calculation module is configured to determine the multi-connection bandwidth according to the total number of multi-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total service demand ratio, and the total bandwidth of the system; according to the total bandwidth of the system and multiple connections Band bandwidth determines a single connected band bandwidth;

or

Statistics module: used to determine the total number of single-connected user terminals or service requirements in the network; and determine the total number of connected user terminals or the total amount of service requirements in the network;

The calculation module is configured to determine a single connection band bandwidth according to the total number of single-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total service demand ratio, and the total bandwidth of the system; according to the total bandwidth of the system and the single connection Band bandwidth determines multi-connection band bandwidth;

or

The statistics module is used to determine the total number of multi-connected user terminals or the total amount of service requirements in the network; and determine the total number of single-connected user terminals or the total amount of service requirements in the network;

The calculation module is configured to determine the multi-connection band bandwidth and the single connection band bandwidth according to the ratio of the total number of multi-connected user terminals or the total service demand to the total number of single-connected user terminals or the total service demand and the total system bandwidth.

Based on the above aspects, the transmission module further includes:

a multi-point transmission module: configured to allocate the multi-connection frequency band to a multi-connected user terminal for data transmission, and perform data transmission for a multi-connection state user terminal to apply a multi-point transmission mode;

The silent transmission module is configured to allocate the single connection frequency band to a single-connected user terminal for data transmission, and perform data transmission for a single-connected user terminal to apply a silent transmission mode.

Based on the foregoing aspects, data transmission for a multi-connected user terminal to apply a multi-point transmission mode includes:

or,

Based on the above aspects, the apparatus further includes:

Power determination module: used to determine the maximum transmit power of a single connected band or a multi-connected band.

The present invention provides a data transmission method and device, which distinguishes the connection mode of the user terminal, divides the system spectrum according to the number of user terminals or service requirements of different connection modes, and allocates user terminals of different connection modes to different frequency bands for data transmission. And different transmission modes are applied, the interference in the data transmission process is reduced, and the efficiency of data transmission is improved.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below. It is obvious that the drawings in the following description are only the present invention. Some embodiments, for those of ordinary skill in the art, are not Other drawings can also be obtained from these drawings on the premise of creative work.

FIG. 1 is a flowchart of a method for data transmission according to an embodiment of the present invention;

2 is a flowchart of a method for controlling a single-connected band power according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a wireless network device according to an embodiment of the present disclosure;

4 is a schematic structural diagram of a wireless network device determining module according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a frequency division module of a wireless network device according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a wireless network device transmission module according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a wireless network device according to another embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a wireless network device according to another embodiment 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 a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to make the advantages of the technical solutions of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

The wireless communication network usually includes: a wireless access point, a wireless access point controller and a user terminal; or only includes a wireless access point and a user terminal. The following embodiment uses a cellular mobile communication network as an example for description, and the wireless access point is The base station, the wireless access point controller is a base station controller.

The present invention re-defines the state of the user terminal, including the idle state, the single-connected state, and the multi-connected state.

Idle state: As with the traditional idle state, the user terminal has no data to send and receive, and is in an inactive state.

Single connection state: The user terminal is in the data transmission and reception state, and only communicates with one base station at a time, that is, there is only one serving base station.

Multi-connected state: The user terminal is in the state of data transceiving, and communicates with multiple base stations at each moment, that is, there may be two or more serving base stations at the same time.

The data transmission method provided by the embodiment of the present invention includes:

Determining a connection mode of the user terminal in the network, where the connection mode includes a multi-connected state and a single connected state;

In the following specific embodiment, the above method for data transmission is described in detail:

Referring to Figure 1, the data transmission mainly includes:

101. Determine a connection mode of the user terminal in the network, that is, determine whether the user terminal is in a single-connected state or a multi-connected state, where the network may be the entire network, or an area in the network, for example, one or more base station coverage areas, and one Or the coverage area of the base station managed by multiple base station controllers; the following two examples are used to illustrate:

Method 1: Based on user terminal capabilities and pilot measurements

1. The user terminal measures the pilot information of the serving cell and the neighboring cell, and reports the information to the base station;

2. The user terminal reports its connection capability to the base station to indicate whether multiple connections are supported.

The user terminal can report the connection capability to the base station in a plurality of manners, for example, reporting the connection capability to the base station while reporting the terminal capability, or reporting the connection capability to the base station through the measurement report message of the terminal; or using RRC (Radio Resource Control, The radio resource control) reports the connection capability to the base station, such as carrying the connection capability information in the RRC connection request message; or carrying the connection capability information when initiating the service request to the base station;

3. If the user terminal supports multiple connections, and the pilot signal strength difference of at least two cells is not large, for example, if the pilot signal strength difference is less than a preset threshold, it is determined that the connection mode of the user terminal is multiple connections, otherwise a single connection, that is, the user terminal does not support multiple connections, or there is no pilot signal strength difference of at least two cells is less than the preset threshold, for example, the pilot signal strength difference of any two cells is greater than or equal to the The threshold is determined to be a single connection of the user terminal.

Method 2: Based on user terminal capabilities and interference measurement

1. The user terminal measures the interference of the neighboring area it receives, and may also use other parameters, such as SINR (Signal to Interference plus Noise Ratio); and report it to the base station;

The user terminal can report the connection capability to the base station in a plurality of manners, for example, carrying the connection capability to the base station when reporting the capability of the terminal; or reporting the connection capability to the base station through the measurement report message of the terminal; or reporting the RRC dedicated signaling The connection capability is sent to the base station, such as carrying the connection capability information in the RRC connection request message; or carrying the connection capability information when initiating the service request to the base station;

3. If the user terminal supports multiple connections, and the user terminal is interfered by the neighboring area by more than a preset threshold, for example, the SINR is less than the preset threshold, it is determined that the connection mode of the user terminal is multiple connections; otherwise, the single connection, that is, the user The terminal does not support multiple connections, or the user terminal is interfered by the neighboring area less than or equal to the preset threshold. For example, if the SINR is greater than or equal to the preset threshold, it is determined that the connection mode of the user is a single connection.

102. The system spectrum is divided into a multi-connection frequency band and a single connection frequency band, and the step may be performed by a base station or a base station controller.

The following two examples are used to illustrate the division of the system spectrum:

Method 1, the number of user terminals based on different connection modes in the network

1, determining the total number of multi-connected user terminals in the network, the step can be completed by the base station or the base station controller;

The base station counts the number of multi-connected user terminals. If there are multiple base stations in the network, the base station collects statistics and sends them to other base stations. For example, they can be sent through the interface between the base stations, such as the X2 interface. By interacting with other base stations, one can finally The number of multi-connected user terminals in the network is counted by the base station; or the statistics of each base station are reported to the base station controller, and the total number of multi-connected user terminals in the network is counted by the base station controller;

2, the base station or the base station controller determines the total number of connected state user terminals in the network, and divides the system spectrum into a single connected frequency band and a multiple connected frequency band according to the total number of connected user terminals, the total number of multi-connected user terminals, and the total system bandwidth; among them:

Multi-connection band bandwidth:

Single connection band bandwidth: BW _sc = BW-BW _mc

BW is the total bandwidth of the system, N is the total number of connected user terminals in the network, N _i,mc is the number of multi-connected user terminals of the base station i, and ∑N _i,mc is the total number of multi-connected user terminals in the network.

If the system spectrum division is implemented in the base station controller, the base station controller needs to notify the base station of the division result, and may notify the base station through the S1 interface or the southbound interface, such as the openflow protocol interface.

Method 2: Based on the service requirements of user terminals in different connection modes in the network

1. Determine the total service demand of the multi-connected user terminal in the network, and the step may be completed by the base station or the base station controller;

The base station collects the service requirements of the multi-connected user terminal, such as the data rate requirement or the bandwidth requirement. If there are multiple base stations in the network, the base station collects statistics and sends them to other base stations, for example, through the interface between the base stations, such as the X2 interface. By interacting with other base stations, a base station can finally count the total service demand of the multi-connected user terminals in the network; or the statistics of each base station are reported to the base station controller, and the base station controller collects the multi-connected user terminal services in the network. Total demand;

2. The base station or the controller determines the total service demand of the connected terminal user terminal in the network, and divides the system spectrum into a single according to the total service demand of the connected state user terminal, the total service demand of the multi-connected user terminal, and the total system bandwidth. Connected frequency bands and multiple connected frequency bands; where:

Multi-connection band bandwidth:

Single connection band bandwidth: BW _sc = BW-BW _mc

BW is the total bandwidth of the system, T is the total user terminal service requirement in the network, T _{i, mc} is the service requirement of the multi-connected user terminal of the base station i, and ∑T _{i, mc} is the total of the multi-connected user terminal in the network. Business needs.

Referring to the foregoing two methods, in another embodiment, the total number of single-connected user terminals or the total service demand in the network may also be counted first, according to the total number of single-connected user terminals in the network. The ratio of the total amount of service or service demand to the total number of connected user terminals or the total amount of service demand and the total bandwidth of the system determine the bandwidth of the single connection band, and then determine the bandwidth of the multi-connection band according to the total bandwidth of the system and the bandwidth of the single connection band;

or,

In another embodiment, the total number of multi-connected user terminals or the total number of service requirements in the network, and the total number of single-connected user terminals or the total amount of service requirements may be separately calculated, according to the total number of multi-connected user terminals or the total service demand. The ratio of the total number of single-connected user terminals or the total amount of service demand and the total system bandwidth determine the multi-connection band bandwidth and the single-connection band bandwidth, respectively.

103. Allocating the multi-connection frequency band to a user terminal in a multi-connection state for data transmission, and allocating the single connection frequency band to a user terminal in a single-connected state for data transmission; wherein, applying different manners to user terminals of different connection modes Transmission method for data transmission.

Specifically, data transmission may be performed for a multi-connected user terminal to apply a multi-point transmission mode; data transmission may be performed for a single-connected user terminal to apply a silent transmission mode.

The data transmission for the multi-connection user terminal to apply the multi-point transmission mode includes:

The serving cell and the neighboring cell simultaneously transmit data in the same spectrum resource, that is, the multi-connected state band and the multi-connected user terminal;

or,

When the serving cell and the neighboring cell are jointly scheduled, and the serving cell and the multi-connected user terminal perform data transmission, the neighboring cell staggers transmission resources, such as time-frequency resources and space resources, to avoid multi-connected user terminals of the serving cell. interference;

or,

When the serving cell and the multi-connected user terminal perform data transmission, the multi-connected user terminal acquires interference signal configuration information of the neighboring cell, such as a modulation and coding mode, a FEC (Forward Error Correction), a coding rate, and the like. One or more parameters and interference cancellation according to the interference signal configuration information.

In the embodiment of the present invention, data transmission between the cell and the user terminal refers to data transmission between the cell base station and the user terminal.

The data transmission for the mode in which the single-connected user terminal applies the silent transmission includes:

When the single-connected user terminal of the serving cell is interfered by the neighboring area by more than a preset threshold, The neighboring area performs data transmission with zero power or low power according to the silence duration and the silence pattern negotiated with the serving cell. Similarly, when the single-connected user terminal in the neighboring cell is interfered by the serving cell by more than a preset threshold, the serving cell performs data transmission with zero power or low power according to the silence duration and the silence pattern negotiated with the neighboring cell. Each base station in the network performs the above operations.

The following is a detailed description of the silent transmission:

For a single-connected user terminal, the neighboring area interferes greatly. When the interference is greater than the preset threshold, the serving cell needs to coordinate with the neighboring area. When sending data to these user terminals, the relevant neighboring area needs to be Data transmission is performed at zero power or low power according to the negotiated silence duration and silent pattern to avoid interference. The quiet duration and the pattern of the cell are determined by the distribution of the single-connected user terminal. During the negotiation of the quiet duration, the user-related parameters of the cell can be negotiated at the same time, and the user-related parameters are sent to the single-connected user terminal. The connected state user terminal may determine whether to reselect a suitable cell for data transmission according to the user association parameter.

The user association parameter is a cell level, that is, each cell has a user association parameter, which is used to assist the user terminal to perform cell selection. When the user terminal performs cell selection, the user association parameter needs to be considered. For example, if the user terminal performs cell selection according to the pilot signal strength of the base station, the cell with the strongest signal is selected as the serving cell. Under the user association parameter, the serving cell selected by the user terminal may be the cell with the largest sum of pilot signal strength and user association parameters.

After the cell reselection based on the user association parameters, the partial single-connected user terminal may be more conducive to the optimization of the entire network performance. In a specific embodiment, the silent duration and the user association parameters may be jointly optimized to maximize the utility of the entire network. Functions, such as the average throughput of the entire network, are targeted as follows:

Subject to

s∈S

β∈R

s is the silent duration variable, β is the user-associated variable; X is the average single-connected user terminal data rate, U is the network utility function, S is the pre-set silence duration value space, and R is the preset user-associated parameter. Ranges;

In a specific embodiment,

U _k is the utility function of beam k, for example:

X _i is the average data rate of the single-connected user terminal of beam k, w _i is the weight of the single-connected user terminal i; if the base station does not use multi-beam, k denotes the base station. By solving the joint optimization problem described above, the optimal silence duration s* and user association parameter β* of each base station or beam that requires interference coordination can be obtained.

For the duration of silence, that is, the number of subframes that need to be silenced, it is further necessary to determine which subframes to silence. The corresponding silence pattern a* can be obtained by:

Subject to

L and M are the number of subframes and the number of beams, respectively. G _ki represents the interference relationship between the beam i and the beam k. For example, G _ki =1, indicating that the interference of the beam i to the beam k is greater than a preset threshold, and the interference relationship between the beams or the beams can be obtained by the interference measurement of the user; If the base station does not use multiple beams, k denotes a base station.

s _k is the silence duration of beam k, a _ij =0, indicating that beam i is silent in subframe j.

In one embodiment, a specific method for applying a silent mode for data transmission for a single-connected user terminal is as follows:

1: Through the interference measurement of the single-connected user terminal, the interference relationship between each base station or beam can be obtained, that is, G _ki ;

2: determining, according to the optimization of the silence duration and the user association parameter, the silence duration s* and the user association parameter β* of each base station or beam that need to interfere with coordination;

3: determining a silence duration pattern a* of each base station or beam based on the obtained silence duration s* and the interference relationship G _ki ;

Optionally, the base station may send the negotiated user association parameter β* to each single-connected user terminal, so that the single-connected user terminal determines whether the user is heavy according to the user association parameter β*. Select a suitable cell for data transmission.

In the foregoing embodiment, by adaptively adjusting the division of the system frequency band, different transmission frequency bands and transmission modes are allocated for different types of user terminals, thereby effectively reducing neighboring area interference and improving data transmission efficiency; further, multi-connected users The terminal adopts the mode of multi-point transmission for data transmission, and the single-connected user terminal adopts the mode of silent transmission for data transmission, which enhances the flexibility of interference cancellation; the above steps can be performed with a large time granularity.

In addition, for the single connection frequency band, in order to further reduce the interference, the power control may be separately performed, that is, the maximum transmission power of the single connection frequency band is determined, so as to achieve better communication with different transmission modes of different types of terminals in the previous embodiments. The effect of interference cancellation, likewise, the power control method of the single connection band can also be used for multi-connection frequency bands, which can be performed with a small time granularity.

The single-link band power control process is described in detail below for a serving cell base station. If there are multiple base stations in the network, each base station can perform similar operations. Those skilled in the art can know that the method can also be used for multiple connections. frequency band.

Referring to FIG. 2, the single connection band power control method includes:

201. The base station divides the single connection frequency band into multiple sub-bands, and can equally divide and perform virtual sub-band scheduling on the user. For example, based on the total user data rate on the current subband, the subbands are sorted in descending order, and then users are virtually allocated for each subband; the neighbor base station performs similar operations.

X(P ⁿ ) is the average user data rate on subband n, for example:

The user i indicating the base station 1 is scheduled to the sub-band n, and K _l is the set of users of the base station 1.

202. The base station calculates a power gradient of each sub-band of the serving cell relative to each neighboring area based on the interference of the neighboring cell and the virtual user scheduling measured by the user equipment. The power gradient is a partial bias of the power of the network utility function on the sub-bands of the neighboring cell, indicating the influence of the adjustment of the power of the neighboring sub-bands on the utility function of the cell, and the negative value indicating that the power of the adjacent sub-bands increases the sub-band power. The cell utility function is reduced, that is, negative, and vice versa. The neighbor base station also performs a similar operation.

Where U _k is the utility function of the base station k, and the base station m is the neighboring area of the base station k. P(m,j) is the power of base station m on subband j.

203. The base station sends a corresponding power gradient to each neighboring cell. For example, the base station k sends the power parameter D _m,k,j to the base station m. The power parameters can be exchanged through an interface between the base stations, such as an X2 interface, such as by load information messages. Similarly, the base station also receives each neighboring cell to calculate and transmit the power gradient of each sub-band to the serving cell.

204. The base station calculates, according to the power gradient of each sub-band of each neighboring cell to the serving cell, a power adjustment amount of each sub-band of the serving cell.

Where S is a constant. It can be seen that the power adjustment amount of the sub-band is dynamically changed because the bias of the power of the network utility function on the sub-band varies with the network interference environment.

205. The base station determines, according to a power adjustment quantity of each subband of the serving cell, a transmit power of each subband of the serving cell, where is a sum of a current subband power and a corresponding power adjustment amount; and a sum of transmit powers of the serving cell subband, ie, The maximum transmit power for the single-link band of the serving cell.

Similarly, the sum of the transmission powers of each sub-band of each cell is the maximum transmission power of the single-connection frequency band of each cell; the maximum transmission power of the single-connection frequency band of the cell cannot exceed the physical maximum transmission power of the single-connection frequency band of the cell. The physical maximum transmit power of the single-connected frequency band may be specifically determined based on the service demand ratio of the multi-connected user terminal. For example, according to the service demand ratio of the multi-connected user terminal, the physical maximum transmit power of the multi-connection frequency band can be determined, and the physical maximum transmit power of the single-connection frequency band is the physical maximum transmit power of the base station minus the physical maximum transmit power of the multi-connection frequency band.

The maximum transmit power of the single-link band of the serving cell is the power mask of the single-connected band. The power mask of the multi-connection band is the maximum transmit power of the base station minus the power mask of the single-link band. When the radio resource manager of each base station performs power allocation, such as subcarrier power allocation, the single connection band power mask and the multi-connection band power mask are respectively upper limits.

Similarly, the above method can also be applied to the multi-connection frequency band to determine the multi-connection frequency of the serving cell. The maximum transmit power of the band is the power mask of the multi-connection band. The power mask of the single connected band is the maximum transmit power of the base station minus the power mask of the multi-connected band.

In each of the above embodiments, the cell is a cell formed by a base station or a base station beam.

The power control method described above is performed at a small time granularity, and the interference cancellation of the non-transmission mode is adopted for different types of terminals in a large time granularity, so that the interference elimination management is more flexible and the effect is better.

Based on the foregoing method for data transmission, the embodiment of the present invention further provides a corresponding wireless communication network device, where the device may correspond to a wireless access point in the method, such as: a base station; or may be a wireless access point and wireless access. Point controllers, such as base stations and base station controllers.

Referring to FIG. 3, the wireless network device includes:

a determining module 301: configured to determine a connection mode of the user terminal in the network, where the connection mode includes a multi-connected state and a single connected state;

The frequency dividing module 302 is configured to divide the system spectrum into a multi-connection frequency band and a single connection frequency band according to the number of user terminals or service requirements of different connection modes;

a transmission module 303: configured to allocate the multi-connection frequency band to a multi-connected user terminal for data transmission, and allocate the single connection frequency band to a single-connected user terminal for data transmission;

among them:

The transmission module 303 is further configured to apply different transmission modes for data transmission for user terminals of different connection modes.

Further, referring to FIG. 4, the determining module 301 includes:

The receiving module 401 is configured to receive pilot information of the serving cell and the neighboring cell that is measured and reported by the user terminal, and receive connection capability information of the user terminal that is reported by the user terminal;

The determining module 402 is configured to: if the user terminal supports the multi-connected state, and the pilot signal strength difference of the at least two cells is less than a preset threshold, determine that the connection mode of the user terminal is a multi-connected state, otherwise, the single connection state;

or

The receiving module 401 is configured to receive neighboring cell interference information that is measured and reported by the user terminal, and receive connection capability information of the user terminal that is reported by the user terminal;

The determining module 402 is configured to determine that the connection mode of the user terminal is a multi-connected state if the user terminal supports the multi-connected state, and the neighboring cell interference is greater than a preset threshold, and is otherwise a single connected state.

The receiving module 401 and the determining module 402 can also have the above two functions.

Further, referring to FIG. 5, the frequency dividing module 302 includes:

The statistic module 501 is configured to determine a total number of multi-connected user terminals or a total service requirement in the network, and determine a total number of connected user terminals or a total service demand in the network;

The calculation module 502 is configured to determine, according to the total number of multi-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total service demand ratio and the total bandwidth of the system, and determine the multi-connection bandwidth; The connection band bandwidth determines the single connection band bandwidth;

or

The statistics module 501 is configured to determine a total number of single-connected user terminals or service requirements in the network, and determine a total number of connected user terminals or a total service demand in the network;

The calculation module 502 is configured to determine a single connection band bandwidth according to the total number of single-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total service demand ratio, and the total bandwidth of the system; Connecting the bandwidth of the band to determine the bandwidth of the multi-connection band;

or

The statistic module 501 is configured to determine a total number of multi-connected user terminals or a total service requirement in the network, and determine a total number of single-connected user terminals or a total service demand in the network;

The calculating module 502 is configured to determine a multi-connection band bandwidth and a single connection band bandwidth according to a ratio of a total number of multi-connected user terminals or a total service requirement to a total number of single-connected user terminals or a total service demand ratio and a total system bandwidth. .

The above statistics module 501 and the calculation module 502 can also specify the above two or three functions at the same time.

Further, referring to FIG. 6, the transmission module 303 further includes:

a multi-point transmission module 601: configured to allocate the multi-connection frequency band to a multi-connection state user terminal for data transmission, and perform multi-connection state user terminal application multi-point transmission mode for data transmission;

a silent transmission module 602: a user terminal for allocating the single connection band to a single connected state The data transmission is performed, and the data transmission is performed for the mode in which the single-connected user terminal applies the silent transmission.

Further, the data transmission for the multi-connected user terminal to apply the multi-point transmission mode includes:

or,

Further, the data transmission for the mode in which the single-connected user terminal applies the silent transmission includes:

Referring to FIG. 7, further, the wireless network device may further include:

The power determination module 304 is configured to determine a maximum transmit power of a single connected band or a multi-connected band. For specific functions, refer to steps 201-205 in FIG. 2 of the method embodiment.

The corresponding wireless network device mentioned in the embodiment of the method for the corresponding embodiment of the wireless network device provided by the embodiment of the present invention may implement the corresponding steps of the foregoing method embodiment. For the specific function implementation, refer to the description in the method embodiment. No longer.

In addition, the embodiment of the present invention further provides a wireless network device. Referring to FIG. 8, the device includes a processor 802, a receiver 801, and a transmitter 803, corresponding to the corresponding network device mentioned in the method embodiment, to implement corresponding Function, the device is similar to the wireless network device of the embodiment of Figure 3, wherein:

Receiver 801: configured to determine a connection mode of a user terminal in the network, the connection mode package Including multiple connected states and single connected states;

The processor 802 is configured to divide the system spectrum into multiple connected frequency bands and single connected frequency bands according to the number of user terminals or service requirements of different connection modes;

a transmitter 803: configured to allocate the multi-connection frequency band to a multi-connected user terminal for data transmission, and allocate the single connection frequency band to a single-connected user terminal for data transmission;

among them:

The transmitter 803 is also configured to apply different transmission modes for data transmission for user terminals of different connection modes.

In addition, the implementation manner is various, and is not limited to the foregoing implementation manners. For example, the receiver 801 can implement the corresponding function of the receiving module 401 in FIG. 4, and the determining module 402 can be implemented by the processor 802. The power determining module 304 in FIG. 7 can be implemented by The processor 802 implements, the receiver 801, the processor 802 and the transmitter 803 jointly implement corresponding functions of the network device in the method embodiment, for example, the receiver 801 implements related receiving related functions, and the transmitter 803 implements related transmission and transmission related functions. The processor 802 implements related functions such as calculation, statistics, and judgment.

The data transmission method and device according to the embodiment of the present invention adaptively allocates spectrum resources according to the connection state of the user terminals in the network, thereby effectively avoiding interference of user terminals in the cell during data transmission, and reducing interference of user terminals between cells; In addition, the multi-point transmission and the silent transmission optimization of the joint multi-cell further reduce the interference of the user terminals between the cells; and can also combine the power adjustment of the multi-cell, further reduce the interference between the cells, and enhance the flexibility of the interference management.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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. All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

A method for data transmission, comprising:

Determining a connection mode of the user terminal in the network, where the connection mode includes a multi-connected state and a single connected state;

Dividing the system spectrum into a multi-connection frequency band and a single connection frequency band according to the number of user terminals or service requirements of different connection modes;

Allocating the multi-connection frequency band to a multi-connected user terminal for data transmission, and allocating the single connection frequency band to a single-connected user terminal for data transmission; wherein:

Data transmission is performed by applying different transmission modes to user terminals of different connection modes.
The method according to claim 1, wherein determining a connection mode of the user terminal in the network comprises:

Receiving pilot information of the serving cell and the neighboring cell measured and reported by the user terminal;

Receiving connection capability information of the user terminal reported by the user terminal;

If the user terminal supports the multi-connected state, and the pilot signal strength difference of the at least two cells is less than the preset threshold, determining that the connection mode of the user terminal is a multi-connected state, otherwise, the single-connected state;

or

Receiving neighboring area interference information measured and reported by the user terminal;

Receiving connection capability information of the user terminal reported by the user terminal;

If the user terminal supports the multi-connection state, and the neighboring cell interference is greater than the preset threshold, it is determined that the connection mode of the user terminal is a multi-connected state, otherwise, the single-connected state.
The method according to claim 1, wherein the dividing the system spectrum into the multi-connection frequency band and the single connection frequency band according to the number of terminals or service requirements of different connection modes comprises:

Determine the total number of multi-connected user terminals or the total amount of business requirements in the network;

Determine the total number of connected user terminals or the total amount of business requirements in the network;

Determining the multi-connection band bandwidth according to the total number of multi-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total amount of service demand, and the total bandwidth of the system;

Determining a single connected band bandwidth according to the total bandwidth of the system and the bandwidth of the multi-connection band;

or

Determine the total number of single-connected user terminals or the total amount of business requirements in the network;

Determine the total number of connected user terminals or the total amount of business requirements in the network;

Determining a single connection band bandwidth according to the total number of single-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total amount of service requirements, and the total system bandwidth;

Determining the multi-connection band bandwidth according to the total bandwidth of the system and the bandwidth of the single connection band;

or

Determine the total number of multi-connected user terminals or the total amount of business requirements in the network;

Determine the total number of single-connected user terminals or the total amount of business requirements in the network;

The multi-connection band bandwidth and the single-connection band bandwidth are respectively determined according to the ratio of the total number of multi-connected user terminals or the total service demand to the total number of single-connected user terminals or the total service demand and the total system bandwidth.
The method according to any one of claims 1 to 3, wherein the data transmission by using different transmission modes for terminals of different connection modes comprises:

Data transmission is performed for a multi-connected user terminal to apply a multi-point transmission mode;

Data transmission is performed for a mode in which a single-connected user terminal applies a silent transmission.
The method according to claim 4, wherein the data transmission for the mode of applying the multi-point transmission to the multi-connected user terminal comprises:

The serving cell and the neighboring cell simultaneously transmit data with the multi-connected user terminal;

or,

When the serving cell and the neighboring cell are jointly scheduled, and the serving cell and the multi-connected user terminal perform data transmission, the neighboring cell staggers the transmission resource to avoid interference to the multi-connected user terminal of the serving cell;

or,

When the serving cell and the multi-connected user terminal perform data transmission, the multi-connected user terminal acquires interference signal configuration information of the neighboring cell, and performs interference cancellation according to the interference signal configuration information.
The method according to claim 4, wherein the data transmission for the mode of applying the silent transmission to the single-connected user terminal comprises:

When the single-connected user terminal in the neighboring cell is interfered by the serving cell by more than a preset threshold, the serving cell performs data transmission with zero power or low power according to the silence duration and the silence pattern negotiated with the neighboring cell.
The method of claim 6 further comprising:

And determining, by the serving cell, the user association parameter of the serving cell, and sending the user association parameter to the single-connected user terminal, so that the single-connected user terminal is associated with the user according to the user. The parameters determine whether to reselect the appropriate cell for data transmission.
The method according to any one of claims 1 to 3, further comprising determining a maximum transmit power of a single connected band or a multi-connected band.
The method according to claim 8, wherein determining the maximum transmit power of the single-connected band or the multi-connected band includes:

Dividing a single connected band or a multi-connected band into multiple sub-bands;

Receiving a power gradient of each sub-band transmitted by the neighboring cell to the serving cell;

Calculating, according to the power gradient of the serving cell, the power adjustment amount of each subband of the serving cell according to each of the subbands;

Determining, according to a power adjustment amount of each subband of the serving cell, a transmit power of each subband of the serving cell;

The sum of the transmission powers of the sub-bands of the serving cell is calculated, and the maximum transmission power of the single-connected frequency band or the multi-connection frequency band of the serving cell is obtained.
A wireless communication network device, comprising:

a determining module: configured to determine a connection mode of a user terminal in the network, where the connection mode includes a multi-connected state and a single connected state;

Frequency division module: used to divide the system spectrum into a multi-connection frequency band and a single connection frequency band according to the number of user terminals or service requirements of different connection modes;

a transmission module: configured to allocate the multi-connection frequency band to a multi-connected user terminal for data transmission, and allocate the single connection frequency band to a single-connected user terminal for data transmission;

among them:

The transmission module is also used to apply different transmission modes for data transmission for user terminals of different connection modes.
The device according to claim 10, wherein the determining module comprises:

a receiving module: receiving pilot information of a serving cell and a neighboring cell that is measured and reported by the user terminal; and receiving connection capability information of the user terminal reported by the user terminal;

a judging module, configured to: if the user terminal supports a multi-connection state, and the pilot signal strength difference of the at least two cells is less than a preset threshold, determining that the connection mode of the user terminal is a multi-connected state, otherwise, the single-connected state ;

or

a receiving module: receiving neighboring cell interference information measured and reported by the user terminal; and receiving connection capability information of the user terminal reported by the user terminal;

The judging module is configured to: if the user terminal supports the multi-connection state, and the neighboring cell interference is greater than the preset threshold, determine that the connection mode of the user terminal is a multi-connected state, otherwise, the single-connected state.
The device according to claim 10, wherein the frequency dividing module comprises:

The statistics module is used to determine the total number of multi-connected user terminals or the total amount of service requirements in the network; and determine the total number of connected user terminals or the total amount of service requirements in the network;

The calculation module is configured to determine the multi-connection bandwidth according to the total number of multi-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total service demand ratio, and the total bandwidth of the system; according to the total bandwidth of the system and multiple connections Band bandwidth determines a single connected band bandwidth;

or

Statistics module: used to determine the total number of single-connected user terminals or service requirements in the network; and determine the total number of connected user terminals or the total amount of service requirements in the network;

The calculation module is configured to determine a single connection band bandwidth according to the total number of single-connected user terminals or the total service demand in the network, the total number of connected user terminals or the total service demand ratio, and the total bandwidth of the system; according to the total bandwidth of the system and the single connection Band bandwidth determines multi-connection band bandwidth;

or

The statistics module is used to determine the total number of multi-connected user terminals or the total amount of service requirements in the network; and determine the total number of single-connected user terminals or the total amount of service requirements in the network;

Calculation module: used to connect to a single connection according to the total number of multi-connected user terminals or the total amount of business needs The ratio of the total number of connected user terminals or the total amount of service demand and the total bandwidth of the system determine the bandwidth of the multi-connection band and the bandwidth of the single connection band, respectively.
The device according to any one of claims 10 to 12, wherein the transmission module further comprises:

a multi-point transmission module: configured to allocate the multi-connection frequency band to a multi-connected user terminal for data transmission, and perform data transmission for a multi-connection state user terminal to apply a multi-point transmission mode;

The silent transmission module is configured to allocate the single connection frequency band to a single-connected user terminal for data transmission, and perform data transmission for a single-connected user terminal to apply a silent transmission mode.
The device according to claim 13, wherein the data transmission for the mode of applying the multi-point transmission to the multi-connected user terminal comprises:

The serving cell and the neighboring cell simultaneously transmit data with the multi-connected user terminal;

or,

When the serving cell and the neighboring cell are jointly scheduled, and the serving cell and the multi-connected user terminal perform data transmission, the neighboring cell staggers the transmission resource to avoid interference to the multi-connected user terminal of the serving cell;

or,

When the serving cell and the multi-connected user terminal perform data transmission, the multi-connected user terminal acquires interference signal configuration information of the neighboring cell, and performs interference cancellation according to the interference signal configuration information.
The device according to claim 13, wherein the data transmission for the mode of applying the silent transmission to the single-connected user terminal comprises:

When the single-connected user terminal in the neighboring cell is interfered by the serving cell by more than a preset threshold, the serving cell performs data transmission with zero power or low power according to the silence duration and the silence pattern negotiated with the neighboring cell.
The device according to any one of claims 10 to 12, the device further comprising:

Power determination module: used to determine the maximum transmit power of a single connected band or a multi-connected band.