WO2015085494A1

WO2015085494A1 - Base station and user scheduling method

Info

Publication number: WO2015085494A1
Application number: PCT/CN2013/089009
Authority: WO
Inventors: 楼群芳; 秦龙
Original assignee: 华为技术有限公司
Priority date: 2013-12-10
Filing date: 2013-12-10
Publication date: 2015-06-18
Also published as: CN104838714A; CN104838714B

Abstract

Provided are a user scheduling method for a virtual multiple-input multiple-output (V-MIMO) system, and a base station. The user scheduling method comprises: determining a scheduled user set and a non-scheduled user set; selecting one user from the scheduled user set as a first user; selecting at least one user from the non-scheduled user set as a second user; determining a range of a first cooperation set and a range of a second cooperation set, the first cooperation set comprising a serving cell and a cooperation cell of the first user, the second cooperation set comprising a serving cell and a cooperation cell of the second user; and according to a pre-set evaluation criterion, judging whether the first user is successfully matched with the second user. By means of the technical solution provided in the embodiments of the present invention, a higher matching success rate and a higher matching gain of a V-MIMO can be obtained, thereby achieving the purposes of reducing the interference between cells, increasing the system throughput, improving the coverage of cell edges and increasing the user data transmission rate.

Description

Base station and user scheduling method

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a base station device and a user scheduling method for a virtual multiple input/output system. Background technique

Multiple Input-Output (MIMO) technology is an important technology in LTE (Long Term Evolution) communication system, which can improve system capacity and spectrum efficiency, enabling the system to be under limited spectrum resources. Get higher transfer rates and system throughput. By using multiple antennas at both the receiving end and the transmitting end of the communication system, spatial multiplexing gain is obtained, and the capacity of the communication channel is increased.

In practical applications, user equipment (UE, user equipment) is limited by factors such as size, weight, power consumption, and cost. It is not suitable for multiple antennas. For this reason, virtual MIMO (V-MIMO, Virtual) is proposed. The MIMO technology can divide the users who conform to the standard into a group by a specific selection method to form a virtual multi-antenna array that shares the time-frequency resources to transmit data, and can achieve the spatial multiplexing effect of the MIMO system. It can be seen that choosing the appropriate user scheduling method is the key to implementing V-MIMO technology.

In the prior art, the V-MIMO pairing method selects users to be paired among any users in the cell. Since the paired users use the same time-frequency resource block (RB) to send signals to the base station, the interference to the neighboring area is increased. Excessive interference will reduce the success rate of pairing and reduce the gain brought by user pairing. Summary of the invention

The embodiment of the invention provides a user scheduling method and a base station of a virtual multiple input and output system, which can improve the success rate of pairing. In a first aspect, an embodiment of the present invention provides a base station, and a base station, including: a control base station, where the control base station communicates with other parts of the base station by using a communication bus;

The control base station includes: a memory, a processor, a communication link;

The memory is configured to store an instruction;

The processor is in communication with the memory through the communication link; after the instructions stored in the memory are executed by the processor, the control base station enables the base station to implement a virtual multiple input A user scheduling method of the output system, the method comprising:

Selecting a first user that has performed data transmission scheduling, the first user is configured with a first collaboration set; the first collaboration set includes a serving cell and a collaboration cell of the first user;

The base station selects a second user that does not perform data transmission scheduling, and the second user is configured with a second cooperation set; the second cooperation set includes a serving cell and a coordinated cell of the second user;

The first user and the second user are paired using the first collaboration set and the second collaboration set.

In a first possible implementation manner of the first aspect, after the processor is executed, the control base station causes the coordinated cell of the first user to include the first user. a first type of coordinated cell and a second type of coordinated cell; or the coordinated cell of the first user is a second type of coordinated cell;

The first type of coordinated cell includes a neighboring cell of the serving cell of the first user, The difference between the reference signal received power RSRP of the neighboring cell of the serving cell of the first user and the RSRP of the first user in the serving cell is within a preset threshold;

The second type of coordinated cell includes a neighboring cell of the serving cell of the first user, and the neighboring cell of the serving cell of the first user includes a user having the same radio resource block as the first user, and the A coordinated cell of a user having the same resource block as the first user in a neighboring cell of a user's serving cell is a serving cell of the first user.

With reference to the first aspect, or the first possible implementation manner of the first aspect, the second possible implementation manner of the first aspect, the memory further includes some instructions, after the processor is executed, the control base station makes The base station pairs the first user with the second user by using a collaboration set shared by the first user and the second user;

The shared collaboration set is a union of the first collaboration set and the second collaboration set. With reference to the second possible implementation manner of the first aspect, the third possible implementation manner of the first aspect, the memory further includes, after the processor is executed, the control base station causes the base station to obtain a first signal to interference and noise ratio SINR to the first user in the shared collaboration set;

And obtaining a second SINR of the second user in the shared collaboration set; and determining, according to the first SINR and the second SINR, that the first user can be paired with the second user.

With reference to the third possible implementation manner of the first aspect, the fourth possible implementation manner of the first aspect, the memory further stores a segment of instructions, after the processor is executed, the control base station causes the base station to utilize Calculating the first SINR by using channel information in the shared cooperation set; And calculating, by using the channel information in the shared collaboration set, the second

SINR.

In conjunction with the fourth possible implementation of the first aspect, or the fourth possible implementation of the first aspect, the fifth possible implementation manner of the first aspect, the memory further stores an instruction, the processor After the execution, the control base station acquires the SINR of the serving cell of the first user by using the channel information in the serving cell of the first user, and uses the SINR gain obtained by the first user in the shared cooperation set. Correcting an SINR of the serving cell of the first user, to obtain the first SINR;

And acquiring, by using channel information in the serving cell of the second user, an SINR of the serving cell of the second user, and using the SINR gain obtained by the second user in the shared cooperation set to the first The serving cell SINR is corrected to obtain the second S earn.

In a second aspect, an embodiment of the present invention provides a base station, including: a user selection unit, a collaboration set determining unit, and a control unit;

The user selection unit is configured to select a first user who has performed data transmission scheduling, and to select a second user that has not performed data transmission scheduling;

The cooperation set determining unit is configured to use a serving cell and a coordinated cell of the first user as a first collaboration set of the first user; and to serve a serving cell and a collaboration of the second user a cell as a second collaboration set of the second user;

The control unit, in communication with the user selection unit, or in communication with the user selection unit and the collaboration set determination unit, configured to utilize the first collaboration set and the second collaboration set, The first user and the second user are paired. In a first possible implementation manner of the second aspect, the collaboration set determining unit is specifically configured to: configure a coordinated cell of the first user, where the coordinated cell includes a first one of the first user a cooperative cell of the second type; or a coordinated cell of the first user is a second type of coordinated cell;

The first type of coordinated cell includes a neighboring cell of the serving cell of the first user, and a difference between a reference signal received power RSRP of the neighboring cell of the serving cell of the first user and an RSRP of the first user in the serving cell The value is within the preset threshold range;

With reference to the second aspect or the first possible implementation manner of the second aspect, the second possible implementation manner of the second aspect, the control unit further includes a shared collaboration set selection sub-unit, a pairing sub-unit;

The shared collaboration set selection sub-unit is configured to select a collaboration set shared by the first user and the second user, where the shared collaboration set is the first collaboration set and the second collaboration set Union

The pairing sub-unit is configured to perform, by using the cooperation set selected by the first user and the second user selected by the shared collaboration set selection sub-unit, to perform the first user and the second user pair.

With reference to the second possible implementation manner of the second aspect, the third possible implementation manner of the second aspect, the control unit further includes an SINR calculation subunit, and the SINR calculation a subunit is in communication with the shared cooperative set selection subunit and the paired subunit, and the SINR calculation subunit is configured to obtain a first SINR of the first user in the shared collaboration set And a second SINR configured to obtain the second user within the shared collaboration set;

The pairing subunit is configured to be used by, by using the SINR calculation subunit, the first SINR of the first user in the shared collaboration set and the second user in the shared The second SINR in the collaboration set determines that the first user can be paired with the second user.

With reference to the third possible implementation manner of the second aspect, the fourth possible implementation manner of the second aspect, the SINR calculation subunit is specifically configured to use channel information in the shared collaboration set, Calculating the first SINR; and configuring to calculate the second SINR by using channel information in the shared cooperation set.

With reference to the third possible implementation manner of the second aspect, or the fourth possible implementation manner of the second aspect, the fifth possible implementation manner of the second aspect, the SINR calculation subunit is specifically configured to be configured to Obtaining, by using channel information in the serving cell of the first user, an SINR of the serving cell of the first user, and using the SINR gain obtained by the first user in the shared collaboration set to the first user. Correcting the SINR of the serving cell to obtain the first SINR; and, configured to acquire, by using channel information in the serving cell of the second user, an SINR of the serving cell of the second user, The SINR gain obtained by the second user in the shared cooperation set corrects the first serving cell SINR to obtain the second SINR.

In a third aspect, an embodiment of the present invention provides a user scheduling method, including The base station selects a first user that has performed data transmission scheduling, and the first user is configured with a first cooperation set;

The first cooperation set includes a serving cell and a coordinated cell of the first user; the base station selects a second user that does not perform data transmission scheduling, and the second user is configured with a second collaboration set;

The second cooperation set includes a serving cell and a coordinated cell of the second user; and the first user and the second user are paired by using the first collaboration set and the second collaboration set.

In a first possible implementation manner of the third aspect, the coordinated cell of the first user includes: a first type of coordinated cell and a second type of coordinated cell of the first user; or a collaboration of the first user The cell is a second type of coordinated cell;

With reference to the third aspect or the first possible implementation manner of the third aspect, the second possible implementation manner of the third aspect, the using the first collaboration set and the second collaboration set, Pairing a user with the second user, specifically,

And the first user is associated with the collaboration set shared by the first user and the second user The second user performs pairing;

The shared collaboration set is a union of the first collaboration set and the second collaboration set. With reference to the second possible implementation manner of the third aspect, the third possible implementation manner of the third aspect, the using the first collaboration set and the second collaboration set, using the first user and the The second user performs pairing, specifically,

Obtaining a first SINR of the first user in the shared collaboration set;

Obtaining a second SINR of the second user in the shared collaboration set;

Based on the first SINR second SINR, it is determined that the first user can be paired with the second user.

With reference to the third possible implementation manner of the third aspect, the fourth possible implementation manner of the third aspect, the acquiring, by the first user, the first SINR in the shared collaboration set, specifically includes:

Calculating the first SINR by using the channel information in the shared collaboration set; and acquiring the second SINR of the second user in the shared collaboration set, including:

The second SINR is calculated by using channel information in the shared cooperation set. With reference to the third possible implementation manner of the third aspect, or the fourth possible implementation manner of the third aspect, the fifth possible implementation manner of the third aspect, the acquiring the first user in the shared The first SINR in the collaboration set, specifically,

Acquiring the SINR of the serving cell of the first user by using the channel information in the serving cell of the first user, and using the SINR gain obtained by the first user in the shared collaboration set to the first user The SINR of the serving cell is corrected, and the obtained First SINR;

Obtaining, by the second user, a second SINR in the shared collaboration set, specifically,

Acquiring the SINR of the serving cell of the second user by using the channel information in the serving cell of the second user, and using the SINR gain obtained by the second user in the shared cooperation set to the first serving cell The SINR is corrected to obtain the second SINR.

The user scheduling method and the base station provided by the embodiment of the present invention are configured to configure a collaboration set for the to-be-paired user in the cell, where the cooperation set includes a coordinated cell and a serving cell of the user to be paired, and the collaboration set of the paired user is used to The paired users are asked to perform V-MIMO pairing attempts, which can improve the success rate of pairing, thereby obtaining higher pairing gain and improving system performance and capacity. DRAWINGS

1 is a schematic diagram of an application scenario of a V-MIMO system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a user scheduling method according to an embodiment of the present invention;

3 is a schematic diagram of another user scheduling method according to an embodiment of the present invention; FIG. 4 is a schematic diagram of a base station according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another base station according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a processor in a base station according to an embodiment of the present invention. detailed description The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

The method and the base station provided by the embodiments of the present invention are applicable to a long-term evolution (LTE, Long-Term Evolution) communication system and a communication system for LTE subsequent evolution. The method provided by the embodiment of the present invention relates to a base station, where the base station may be an LTE communication. An evolved Node B (e-NodeB, evolved NodeB) in the system or a similar device in a LTE subsequently evolved communication system.

The RBs in the embodiments of the present invention refer to time-frequency resource blocks. The LTE system manages radio resources based on time-frequency resource blocks and allocates uplink and downlink radio resources to users. For example, each RB occupies 180 kHz bandwidth and 0.5 milliseconds.

1 is a schematic diagram of an application scenario of a V-MIMO system according to an embodiment of the present invention. The figure includes a cell 1, a cell 2, and a cell 3, and a base station 1, a base station 2, and a base station 3 that manage each cell. The cell 1 and the cell 2 are in the neighboring cell, the cell 2 and the cell 3 are in the neighboring cell, the first user equipment UE 1 is at the boundary between the cell 1 and the cell 2, and the second user equipment UE2 is in the cell 2 and the cell 3. At the boundary, it is assumed that the cell 2 is the serving cell of the UE1 and the UE2, and the first user forms a pair of V-MIMO user pairs with the second user, and can send a signal to the base station 2 of the cell 2 on the same RB, that is, the first user and the The second user separately transmits signals using a single antenna, but the signals received by the base station 2 can be regarded as two antennas from one user, thereby improving the spectrum efficiency of the system and expanding the system capacity. However, since the V-MIMO user transmits signals to the same RB, the interference to the cell 1 and the cell 3 is enhanced, and at the same time, the first user and the second user also increase mutual interference during the signal transmission. In the embodiment of the present invention, before the pairing by the user, the collaboration set is determined for the first user and the second user, where the cooperation set includes the serving cell and the coordinated cell of the first user or the second user.

The serving cell in the embodiment of the present invention refers to a cell to which the cell to which the cell belongs can send a physical layer control signal and a cell for transmitting broadcast data to the user through a physical downlink control channel, and the serving cell may be selected in the prior art. The class selection method, for example, the user compares the reference signals sent by the base stations of different cells, acquires channel parameters and signal to interference plus noise ratio (SINR) between different cell base stations and the user, and selects one of them. For the month of good service community. The user may also retrieve the channel parameters and SINRs sent by the base stations of the cells collected in the process of determining the serving cell to the selected serving cell base station.

The coordinated cell in the embodiment of the present invention means that different or the same data packet can be sent to the neighboring cell of the service cell of the user in the serving cell in the same resource block as the serving cell. When the user sends a signal to the serving cell, an interference signal to other cells is generated, and after determining the coordinated cell of the user equipment, the signal sent by the user equipment to the serving cell may be jointly received and signaled by multiple cells at the same time. The combining process suppresses inter-cell interference.

The base station of the serving cell may select a coordinated cell by transmitting a cooperation request to a base station of each neighboring cell. The base station of the neighboring cell may decide whether to accept the cooperation request according to whether the user in the neighboring cell meets the capacity requirement, and if receiving the cooperation request, send a reception cooperation request signal to the base station of the serving cell, share user data, and start cooperation. Communication. Use collaborative communication technology for V-MIMO user pairing to reduce the number of pairs generated Disturb, improve pairing performance.

It should be noted that FIG. 1 is only a schematic diagram of a V-MIMO system. In actual cases, the number and location distribution of neighboring cells; the number and location of user equipments in each cell may be determined according to networking requirements, and the present invention The embodiment is not particularly limited.

With reference to the background provided in FIG. 1, the embodiment of the present invention provides a user scheduling method, which is related to a base station. The method flow is as shown in FIG. 2, and includes:

S101: The base station selects a first user that has performed data transmission scheduling, where the first user has a first cooperation set, and the first cooperation set includes a serving cell and a coordinated cell of the first user.

S102: The base station selects a second user that does not perform data transmission scheduling, and the second user has a second cooperation set. The second cooperation set includes a service cell and a coordinated cell of the second user.

Since the transmission channel capacity of the base station is usually smaller than the sum of the data transmission rates of all users in the cell managed by the base station, the base station needs to allocate appropriate channel transmission resources, that is, perform data transmission scheduling, according to different quality of service requirements of each user. The base station can transmit data to the scheduled user according to various existing scheduling rules. For example, the base station performs scheduling according to the service data type, and classifies various types of service data transmitted by the user into different queues according to the destination and priority order, and selects one or more selected queues according to the estimated value of the current channel state. A suitable amount of data is transmitted to complete a data transmission scheduling process. Optionally, in the embodiment of the present invention, each neighboring cell uses the same scheduling rule, and independently schedules data transmission of users in the cell, and allocates transmission resources to users in the cell. After the scheduling is completed, each neighboring area can communicate through signaling interaction. The management information in the scheduling process, which is called the scheduling information, includes the user identification information of the scheduled users in the neighboring area, the RB information, the collaboration set information determined by the neighboring users, and the channel information of the scheduled users in the neighboring area, including The neighboring area has scheduled the user's multi-antenna interference noise autocorrelation matrix (Ruu) and the corresponding channel transmission matrix H and other information.

According to the preset scheduling rule, the base station to which the cell belongs may allocate channel transmission resources for the users that satisfy the condition. The remaining users need to wait for the next scheduling because they do not meet the scheduling conditions. Therefore, after each scheduling is completed, some users in the small area are successfully scheduled, and some users have not yet scheduled, that is, after one scheduling is completed, the successfully scheduled users can form a set of scheduled users, and the users have not been scheduled. Devices can form a collection of unscheduled users.

The base station may select one user as the first user in the set of scheduled users, and the selection method may be various methods in the prior art, such as round Robin selection, random selection, proportional fair selection, etc., the present invention The embodiment is not particularly limited.

Optionally, the first user is selected by using a round robin method, and all scheduled users are accepted in a cyclic manner, and other waiting users must be served once before the selected user is served again. It can guarantee the fairness between users, that is, to ensure that each user can get certain service time and minimum delay requirements.

The base station may also select at least one user as the second user in the unscheduled user set, and the selection method may also be various methods in the prior art, such as random selection, proportional fair selection, orthogonal selection, etc., the present invention The embodiment is not particularly limited.

Optionally, the second user can be selected according to the principle of proportional fairness. Firstly, according to the proportional fairness, the priority of the user scheduling in the primary serving cell is initialized, and the priority is ranked according to the priority level. At least one user with a high priority is selected as a candidate pairing user, and the best channel is allocated to the user, and the user throughput is improved as much as possible while ensuring the fairness among the users in the cell, so that a better pairing effect can be obtained; In the inter-cell joint reception process after pairing, the channel correlation between the paired users is considered, the orthogonality between the paired users is enhanced, and the interference between the paired users at the time of receiving detection is reduced.

Optionally, there are two ways to select the range of the second user. One is to select only one user for each pairing. If the pairing is unsuccessful, continue to select another user for the pairing attempt. Second, select 2 for each pairing. The above candidate second users respectively perform pairing attempts with the first user, and select the best performing users for pairing, which can improve the pairing effect.

Optionally, S101 and S102 can be executed simultaneously, or in an exchange sequence.

S103: Pair the first user with the second user by using the first collaboration set and the second collaboration set.

Optionally, the first user and the second user may be paired according to the collaboration set shared by the first user and the second user, where the shared collaboration set may be a collaboration set and a first user of the first user. The union of the collaboration sets of the two users may also use the collaboration set of the first user as a shared collaboration set.

Using the union of the collaboration set of the first user and the collaboration set of the second user as a shared collaboration set, including: the serving cell and the coordinated cell in the first collaboration set of the first user, and the second user The serving cell and the coordinated cell in the second cooperation set are subjected to a union process, and the union of the cooperation set is regarded as a cooperation set of the first paired user and the candidate paired user, that is, the two types of users have the same expansion Collaboration set. The first user that is not selected is user 1, the serving cell of user 1 is cell 1, and the coordinated cell is cell 2 and cell 3, and B' J The cooperation set of user 1 is {cell 1, cell 2, cell 3}; the selected second user is user 2, the serving cell of user 2 is cell 1, and the coordinated cell is cell 2 and cell 4, then the cooperation set of user 2 For {cell 1, cell 2, cell 4}, after the union is selected, the cooperation set of user 1 is {cell 1, cell 2, cell 3, cell 4}, and the cooperation set of user 2 is {cell 1 , cell 2 , cell 3, cell 4}, the cooperation set of user 1 and user 2 are extended.

Optionally, in order to ensure the quality of the overall throughput of the system, a limit may be preset for the scope of the collaboration set of the user. In this case, the collaboration set may exceed the preset collaboration set range, so the first paired user may be taken. The collaboration set serves as a collaboration set shared by the first paired user and the candidate paired user.

The collaboration set is used as the collaboration set shared by the first user and the second user to be paired, which expands the cooperation set range of the users to be paired, and increases the number of cells participating in the first user or the second user collaborative communication, and better The inter-cell interference is suppressed, and the wireless spectrum utilization rate is improved. Therefore, judging the pairing between users in the union of the cooperative sets can improve the success rate of the pairing. When the paired V-MIMO user pair communicates with the base station, It is also possible to obtain more signal combining gain and interference suppression gain.

The manner of the pairing may be various manners in the prior art, for example, an orthogonal matching algorithm, a random matching algorithm, a determinant pairing algorithm, and the like, which are not specifically limited in the embodiment of the present invention.

The user scheduling method and the base station provided by the embodiment of the present invention configure a cooperation set for the to-be-paired user in the cell, where the cooperation set includes the coordinated cell and the serving cell of the user to be paired, and selects the union of the collaboration set of the user to be paired as The collaboration set shared by the users to be paired, and the V-MIMO pairing attempt is performed on the to-be-paired users in the cooperation set union The scope of the collaboration set of the paired users is increased, the number of cells participating in the cooperative communication of the users to be paired is increased, the inter-cell interference is suppressed, the success rate of the pairing can be further improved, the high pairing gain is obtained, and the system performance and capacity are improved.

Further, referring to the foregoing embodiment, the embodiment of the present invention further provides a user scheduling method. As shown in FIG. 3, the method process includes:

S201: Each neighboring cell base station independently schedules data transmission of the user in the cell.

S202: Each neighboring cell base station determines a set of scheduled users and an unscheduled user set in the cell, respectively.

S203: The base station selects one user as the first user in the set of scheduled users, and waits for pairing.

The foregoing steps S201-S203 can be implemented on the basis of the step S101 of the embodiment shown in FIG. 2. For details, refer to the detailed description of the embodiment shown in FIG. 2, and the same parts are not described herein.

S204: The base station determines a first cooperation set of the first user, where the first cooperation set includes a serving cell and a coordinated cell of the first user, where the coordinated cell includes a first type of coordinated cell and a second type of coordinated cell. .

The serving cell and the coordinated cell may be different cells in one base station, or may be different cells in different base stations, and are not particularly limited herein. The base station in the embodiment of the present invention is a base station to which the serving cell belongs unless otherwise specified.

Optionally, the first user may measure the RSRP of the serving cell, and obtain the measured value RSRPserv. The RSRP of the neighboring cell of the serving cell may also be measured, and the measured value RSRPneigh is obtained, and the two measured values are reported to the serving cell. Base station.

By determining whether the difference between the RSRPserv and the RSRPneigh satisfies the formula RSRPserv - RSRPneigh>XdB, to determine the first type of coordinated cell of the first user, where X is a preset threshold, which can be obtained by simulation experiments or set according to the actual situation of the network, and the embodiment of the present invention does not make special For example, the value of X can be between Odb and 10db. That is, the signal of the serving cell received by the first user is stronger than the selected first type of coordinated cell, but the difference of the signal strength is within a certain threshold.

By using the first type of cooperation d, the area for joint signal transmission, the signal combining gain can be brought to the first user. The user having the first type of coordinated cell may be a cell edge user of the serving cell, and the cell edge user may judge according to the distance from the user to the base station, or according to the channel fading corresponding to the radius corresponding to the location.

The second type of coordinated cell may be determined according to the scheduling information of the serving cell and the neighboring cell, the coordinated set of the determined neighboring users, and the radio resource block information of the neighboring cell, and the neighboring channel information.

If the first user has the same RB as a user in the neighboring cell, and the coordinated cell of the neighboring user is the serving cell where the first user is located, the first user may consider the neighboring cell as the second type of collaboration. Community. The first user having the second type of coordinated cell may be any user in the service cell, and is not limited to the cell edge user.

The second type of coordinated cell is selected for the first user in the foregoing manner, and the coordinated cell of the non-cell edge user may be extended for the first user that is the non-cell edge user, and the second type of coordinated cell may be used. The interference generated when the non-cell edge user sends a signal to the serving cell is converted into an available signal, and cooperative communication with the serving cell suppresses the neighboring cell interference, improves the SINR of the non-cell edge user, increases the range of users available for pairing, and improves The success rate of the pairing, further, through the coordinated cell Pairing between users enables greater pairing gain and increased system throughput.

Optionally, in order to ensure the total throughput quality of the cell, an upper limit of the user coordinated cell in the cell may be pre-defined. Therefore, when the coordinated cell of the first user is limited by the number, the first type of coordinated cell is first considered.

Optionally, the first user may have a first type of coordinated cell or a second type of coordinated cell, or both a first type of coordinated cell and a second type of coordinated cell.

S205: The base station selects at least one user as the second user in the unscheduled user set.

For the specific selection method of the second user, reference may be made to the related description in the embodiment shown in FIG. 2, and details are not described herein.

S206: The base station determines a second cooperation set of the second user, where the second cooperation set includes a serving cell and a coordinated cell of the second user.

Since the second user is an unscheduled user, there is no interaction of the neighboring area scheduling information, and only the first type of coordinated cell is present. Therefore, the method for determining the coordinated cell of the second user is the same as the first type of the coordinated cell of the first user, and details are not described herein.

Optionally, the foregoing steps 203-206 may be performed simultaneously, or in other orders, without particular limitation. In particular, the determining of the first collaboration set and the second collaboration set may be performed after the first user or the second user is selected, or may be the scheduled user collection before selecting the first user or the second user. All users in the unscheduled user set are pre-configured, and the present invention does not limit this.

S207: Select a union of the first collaboration set and the second collaboration set as a collaboration set shared by the first user and the second user. The manner of selecting the union of the collaboration set is described in the embodiment shown in FIG. 2, and details are not described herein again.

S208: Obtain channel information corresponding to the first user and the second user in the shared cooperation set, and calculate a post-processing SINR of the first user and the second user.

The post-processing SINR represents a user SINR calculated by the base station or other control device for detecting a signal sent by the user, and performing noise equalization, etc., and obtaining a signal processing gain, corresponding to the pre-processing SINR.

Post-processing SINR is the most important indicator of the flag throughput. It has a mapping relationship with system performance parameters such as channel quality, system capacity, and spectrum efficiency. It can reflect the change in system throughput, which can reflect the user performance gain after pairing. Therefore, the post-processing SINR can be used as an evaluation index for judging whether the first user can successfully pair with the first pairing user. The higher the user's SINR, the smaller the interference, the higher the system throughput, and the better the pairing effect.

Optionally, the post-processing SINR of the first user, which is referred to as a first SINR, may be calculated by using channel information in the shared cooperation set. The post-processing SINR of the second user, which is called the second SINR, may also be obtained by using the channel information in the shared cooperation set. The channel information includes a multi-antenna interference noise autocorrelation matrix (Ruu) and a corresponding channel transmission matrix 11 in a union set of the first user and the second user.

For example, suppose that user 0 is the first user and user 1 is the second user, assuming that the cooperation set of user 0 is {cell 0, cell 1, cell 2}; if the cooperation set of user 1 is {cell 0, cell 2}, then The cooperation set of user 0 and user 1 is a union of {cell 0, cell 1 and cell 2}, each cell The number of receiving antennas of the associated base station is 2. If the user 0 and the user 1 are successfully paired, the number of receiving antennas that can be used to receive the signals sent by the user 0 and the user 1 is 6, respectively, antenna 1 antenna 2, .... .. antenna 6,

Then, within the scope of the union of the cooperation set, the channel matrix of user 0 and user 1 is expanded to:

Uu,6x6 (1)

In the formula (1), h. Indicates the channel vector of user 0, 1^ represents the channel vector of user 1, h ₀₁ , h. ₂ ... h. ₆ denotes a channel impulse response of user 0 in the channel corresponding to the 1-6th antenna in the coordinated three cells, h _u , h ₁₂ ... h ₁₆ denotes the first in the three coordinated cells The channel impulse response of User 1 in the channel corresponding to -6 antennas. Ruu is an autocorrelation matrix of the mixed signal u of interference and noise generated by the interference signal matrix u composed of the mixed interference signals of interference and noise received by the 1-6th antenna in the coordinated cell. matrix.

The extended channel matrix is used to calculate the post-processing SINR of the first user and the second user after the pairing, and various post-processing SINR calculation modes in the prior art can be used, and details are not described herein.

In another embodiment, the cooperative set is not in the form of a union, and the cooperation set of the user 0 is {cell 0, cell 1, cell 2}; the cooperation set of the user 1 is {cell 0, cell 2 } , 贝' j + R, formula ( 2 ) hi

Optionally, the SINR calculations of the user 0 and the user 1 may also be performed as follows: (1) using the channel matrix and the corresponding Ruu in the cooperation set of the user 0, using the channel matrix of the serving cell of the user 1 and the corresponding Ruu, respectively calculating The SINR of user 0 and user 1; (2) calculating the SINR of user 0 and user 1 by using the channel matrix of the serving cell of user 0 and the corresponding Ruu, using the channel matrix in the cooperation set of user 1 and the corresponding R _UU ; (3) Both user 0 and user 1 perform SINR calculation using the channel matrix of the serving cell and the corresponding Ruu. Different calculation methods have different degrees of complexity and performance effects. You can choose the appropriate method according to the actual situation of the network.

S209. Determine, according to the first SINR and the second SINR calculated in S208, whether the first user and the second user to be paired are successfully paired.

Optionally, the channel quality and the spectrum efficiency of the SINR mapping may be used to determine whether the first user and the second user can be successfully paired, and the first channel quality indicator of the first user is calculated by calculating the first SINR (CQI, Channel). a value of the second CQI calculated by the second SINR, determining whether the first CQI value and the second CQI value reach a certain threshold, and if a certain threshold is reached, according to the first CQI value and The second CQI value continues to evaluate the performance gain of the first user and the second user after pairing, that is, after the two users are paired, whether the respective spectral efficiency improvement amount Δ also reaches a certain threshold is matched. The threshold of the above CQI and the threshold of the lifting amount Δ can be based on experience. Or experimentally determined or determined based on the actual operation of the network. The first CQI or the second CQI may be obtained by mapping the first SINR or the second SINR; the spectrum efficiency may be determined by a mapping relationship between the first SINR or the second SINR and a modulation mode, where There are instructions, and will not be repeated here. The higher the SINR of the user, the better the channel quality, so it is easy to achieve the channel quality threshold required for pairing. At the same time, the paired V-MIMO user pair can reuse the same time-frequency resource in the spatial dimension, which can make the paired user The throughput has increased, the spectrum utilization has increased, the pairing gain has been achieved, and the pairing has been successful. Conversely, the lower the SINR of the user, the lower the channel quality threshold required for pairing, or the channel condition after pairing, it is difficult to obtain more scheduling resources, and the evaluation of user pairing may lead to spectrum efficiency or throughput degradation. Cannot be paired. Optionally, the user transmit power can also be calculated by using the SINR to represent the user performance gain after the pairing, so as to determine whether the first user and the second user can be successfully paired. specific

+ .

The transmit power increment of the first user and the second user after pairing can be calculated according to the formula ^r ^ equation (3). The transmit power corresponding to the V-MIMO pairing of the first user at time t is the transmission data rate corresponding to PVMMO'A, and the transmit power corresponding to the V-MIMO pairing of the second user at time t is the transmission data corresponding to ^PvMM0 ' ^B. The rate, ^0) is the first user's single antenna input and output transmit power at time t is ^P ^. Corresponding transmission data rate, W is the average transmission data rate of the first user in the time period, (0 is the average transmission data rate of the second user in the time period. The obtaining process of the transmission data rate at time t is: By user equipment t time The transmit power is calculated by the SINR, and the SINR and the spectral efficiency mapping table are searched according to the calculated value of the SINR to obtain the spectral efficiency, and the spectral efficiency is multiplied by the number of RBs obtained by the user equipment, that is, the transmission corresponding to the transmit power is obtained. Data rate. The larger the SINR, the higher the spectrum efficiency, and the larger the corresponding transmission data rate. The larger the transmission power increment calculated according to formula (3), the better the pairing effect. If the transmit power increment reaches a certain threshold, the first user and the second user can be considered to be successfully paired, and the pairing is permitted.

In addition, the existing various matching performance evaluation methods, including the throughput optimization criterion, the fairness criterion, and the like, may be used, and the embodiment of the present invention does not specifically limit this.

The existing evaluation method is adopted, and if the performance requirement of the system after pairing is achieved, it indicates that the first user and the second user are successfully paired, and step S2010 is performed.

S2010: deleting the first user from the scheduled user set, deleting the second user from the unscheduled user set, ending the pairing process, and returning to step 203, in the scheduled user set and the unscheduled user set. Each user is re-selected for a pairing attempt.

If the system fails to meet the performance requirement after pairing, indicating that the first user fails to pair with the second user, the process returns to step 205, and at least one user is reselected in the unscheduled user set to perform a pairing attempt with the first user until the pairing is performed. Successfully, or traversing the unscheduled user set, no user can successfully pair with the first user, then end the pairing.

Optionally, the embodiment of the present invention may further include: S2011: After completing pairing of the first user and the second user, updating the collaboration set of the first user and the second user.

Considering the mobility of the user, the user's service cell will change, and the corresponding collaboration The cell may also be changed. Therefore, the first user who successfully pairs may reselect the coordinated cell according to S204 to obtain a new first cooperation set. For the second user, the second user may reselect the coordinated cell according to S206 to obtain a new second collaboration set. The new first collaboration set is merged with the new second collaboration set, and the collaboration set shared by the first user and the second user is updated, and the pairing policy can be adjusted according to the user's movement condition to improve the pairing performance.

The user scheduling method provided by the embodiment of the present invention determines a set of users to be paired in a cell, and selects a union set of the users to be paired as a shared collaboration set, for example, configuring a coordinated cell for the to-be paired user as a non-cell edge user. Further expanding the scope of the collaboration set of the users to be paired, so that the users to be paired can obtain a higher SINR gain, so that there is a better chance of selecting the most suitable paired users to be paired, thereby improving the probability of success of the pairing. Higher pairing gain, which achieves the goal of reducing inter-cell interference, increasing system throughput, and increasing user data transmission rate.

Optionally, referring to the foregoing embodiment, in another embodiment of the present invention, the SINR of the serving cell of the first user may be calculated by using channel information in a serving cell of the first user, by using the Correcting, by the SINR gain obtained by the first user in the shared cooperation set, the SINR of the serving cell of the first user, to obtain the first SINR; and using channel information in the serving cell of the second user Calculating an SINR of the serving cell of the second user, and correcting an SINR of the second serving cell by using an SINR gain obtained by the second user in the shared cooperation set, to obtain the second SINR.

Optionally, in this embodiment, the SINR of the first user in the cooperation set is SINR1, and the SINR in the serving cell is SINR2, SINR. Gain = SINR2-SINR1 (unit: db). In the same calculation manner, the SINR gain of the second user can be obtained. The SINR gain may be used to modify the post-processing SINR in the serving cell of the first user or the second user, and the modified post-processing SINR may be used to map to the spectrum efficiency or the transmit power, and calculate the performance gain after the pairing. The mapping and calculation methods have been described in other embodiments, and are not mentioned here.

A correction can be:

SINR_l_pair = SINR_l_pair '+ SINR_compgain_l

SINR_2_pair = SINR_2_pair '+ SINR_compgain_2

Wherein SINR_compgain-1 and SINR_compgain-2 indicate the SINR gain obtained by the first paired user and the first candidate paired user in the cooperative set and concentrated; SINR_l_pair and SINR-2_pair indicate the corrected first pairing in the pairing process The post-processing SINR of the user and the first candidate paired user; SINR_l_pair, and SINR_2_pair, indicating the post-processing SINR in the serving cell of the first paired user and the first candidate paired user.

Optionally, the SINR gain is not considered in the pairing process. After the pairing is successful, the post-processing SINR of the paired user is corrected, which can be used to select an optimized MCS, and improve the performance of data transmission between the V-MIMO user pair and the base station.

Specifically, SINR_l_pair = SINR_l_pair' + 0

SINR_2_pair = SINR — 2_pair, + 0

SINR—1— mcs = SINR— 1— mcs, + SINR—compgain— 1

SINR—2— mcs = SINR— 2— mcs '+ SINR—compgain— 2

Among them, SINR-1-mcs' and SINR-2-mcs' indicate the post-processing SINR of paired user 1 and paired user 2 after successful pairing, SINR-1-mcs and SINR-2-mcs indicate repair The post-processing SINR after positive pairing is successful. The other parameters are as described above. Since the SINR gain is not considered in the pairing process, SINR_l_pair is equivalent to SINR-1-mcs, and SINR-2_pair is equivalent to SINR-2. — mcs,.

To ensure the cooperative performance of the scheduled users, when calculating the union of the cooperative sets, the scheduled users can be mainly considered, and the actual processing capability of the system can be considered. If the correction of the SINR is affected by the system, the correction of the post-processing SINR can be Mainly scheduled users: For example, SINR_l_pair = SINR_l_pair + SINR_compgain_l

SINR — 1 — mcs = SINR — 2 — mcs + SINR — compgain — 1

In another embodiment, the first SINR of the first paired user may be calculated by using the channel information in the shared cooperation set; and the channel information in the serving cell of the candidate pairing user is used to determine the The second SINR of the candidate paired user.

In another embodiment, the first SINR of the first user may be calculated by using channel information in the serving cell of the first user, and the channel information is calculated by using the channel information in the cooperation set. The second SINR of the two users.

Optionally, in this embodiment, the gain of the V-MIMO pairing by the cell cooperation is indirectly considered, and the H and Ruu in the shared set of the shared layer are not required to be reported by the physical layer of the base station, and the physical layer of the base station does not need to calculate the first user. The SINR in the collaboration set shared by the second user is small in measurement amount and small in computational complexity. Further, the SINR of the user to be matched is obtained by different calculation methods and used for performance gain evaluation after pairing, and the system with different computing processing capability can be applied, and the efficiency and accuracy of the pairing process are improved.

The embodiment of the present invention further provides a base station. As shown in FIG. 4, the base station may be an evolved node e-NodeB in an LTE communication system or a class in an LTE subsequent evolution system. Like the functions of the device, the base station and its internal modules, the steps of the foregoing method embodiments may be implemented. The base station may include a user selection unit 401, a cooperation set determining unit 402, and a control unit 403, and each unit may be connected to each other by means of a communication bus.

The user selection unit 401 is configured to select a first user who has performed data transmission scheduling, and to select a second user that has not performed data transmission scheduling.

The selection method for the first user may be various methods in the prior art, such as polling selection, random selection, proportional fair selection, etc., which are not specifically limited in the embodiment of the present invention. The second pair of user selection methods may also be various methods in the prior art, such as random selection, proportional fair selection, orthogonal selection, etc., which are not particularly limited in the embodiment of the present invention.

The cooperation set determining unit 402 is configured to use the serving cell and the coordinated cell of the first user as the first collaboration set of the first user, and to serve the serving cell of the second user and The coordinated cell serves as a second collaboration set of the second user.

Optionally, the collaboration set determining unit 402 may be specifically configured to: configure a coordinated cell of the first user, where the coordinated cell includes a first type of coordinated cell of the first user and a second type of collaboration a cell; or the coordinated cell of the first user is a second type of coordinated cell.

The first type of coordinated cell includes a neighboring cell of the serving cell of the first user, and the difference between the RSRP of the neighboring cell of the serving cell of the first user and the RSRP of the first user in the serving cell is preset. Within the limits of the threshold.

The second type of coordinated cell includes a neighboring cell of the serving cell of the first user, and the neighboring cell of the serving cell of the first user includes the same RB as the first user. And the coordinated cell of the user having the same resource block as the first user in the neighboring cell of the first user's serving cell is the serving cell of the first user.

The second type of coordinated cell may be determined according to the scheduling information of the serving cell and the neighboring cell interaction user identification information, the determined cooperation group information of the neighboring cell user, and the RB information of the neighboring cell user, and the neighboring cell channel information.

The joint signal transmission using the first type of coordinated cell can bring the signal combining gain to the first user. The user having the first type of coordinated cell may be a cell edge user of the serving cell, and the cell edge user may judge according to the distance from the user to the base station, or according to the channel fading corresponding to the radius corresponding to the location.

Determining the second type of coordinated cell, the cooperative cell may be configured for the first user belonging to the non-cell edge user, and the scope of the cooperation set of the non-cell edge user may be extended, and the second type of coordinated cell may send the non-cell edge user to the serving cell The interference generated when the signal is transmitted is converted into an available signal, and cooperative communication with the serving cell suppresses the neighboring cell interference, improves the SINR of the non-cell edge user, increases the range of users that can be used for pairing, and improves the success rate of the pairing, further By pairing between users with coordinated cells, a larger pairing gain can be obtained, increasing system throughput.

Optionally, the collaboration set determining unit 402 is further configured to determine a coordinated cell for the second user. Since the second user is an unscheduled user, there is no interaction of the neighboring area scheduling information, and only the first type of coordinated cell is present. Therefore, the method for determining the coordinated cell of the second user is the same as the first type of coordinated cell of the first user, and is not described herein.

The specific method for selecting the coordinated cell of the first user or the second user may refer to this The related description in other embodiments of the invention is not described herein.

The control unit 403, in communication with the user selection unit 401, or in communication with the user selection unit 401 and the collaboration set determination unit 402, configured to utilize the first collaboration set and the second collaboration set Pairing the first user and the second user.

The pairing manner may be various methods in the prior art, for example, an orthogonal pairing algorithm, a random pairing algorithm, a determinant pairing algorithm, and the like, which are not particularly limited in the embodiment of the present invention.

The control unit 403 may directly communicate with the user selection unit 401, acquiring information of the first collaboration set of the first user and the first user, and information of the second collaboration set of the second user and the second user; The user selection unit 401 and the cooperation set determining unit 402 may also be in communication with each other, and the information of the first user and the second user is acquired by the user selection unit 401, and the first user is acquired by the collaboration set determining unit 402. The information of a collaboration set, and the information of the second collaboration set of the second user.

The "communication" in the embodiment of the present invention may be direct communication or indirect communication; or may be logical communication or physical connection communication; or may be point-to-point communication, or use bus communication, which is not performed by the embodiment of the present invention. Any restrictions.

Optionally, the control unit 403 may further include a shared collaboration set selection sub-unit 4031 and a pairing sub-unit 4032.

The shared collaboration set selection sub-unit 4031 is configured to select a collaboration set shared by the first user and the second user, where the shared collaboration set is the first collaboration set and the second collaboration set The union of. For the method for selecting the union of the collaboration set, reference may be made to the related content in the foregoing method embodiments of the present invention, which is not described herein.

Optionally, when the maximum collaboration set range of the user is limited, the collaboration set of the first user may be taken as a collaboration set shared by the first user and the second user.

The pairing sub-unit 4032 is configured to use, by the shared collaboration set selection sub-unit 4031, the collaboration set shared by the first user and the second user, for the first user and the second Users are paired.

Further, the control unit may further include an SINR calculation sub-unit 4033, and the SINR calculation sub-unit 4033 is in communication with the shared cooperation set selection sub-unit 4031 and the pairing sub-unit 4032.

The SINR calculation sub-unit 4033 is configured to obtain a first SINR of the first user within the shared collaboration set; and configured to obtain the second user at the shared The second SINR within the collaboration set.

The pairing sub-unit 4032 may be further configured to specifically use, by using the SINR calculation subunit, the first SINR of the first user in the shared collaboration set and the second user in the a second SINR in the shared collaboration set, determining the The first user can be paired with the second user.

Specifically, the SINR calculation sub-unit 5041 obtains channel information corresponding to the first user and the second user in the shared cooperation set according to the range of the cooperation set, and calculates a post-processing SINR of the first user and the second user, and determines Whether the first user and the second user to be paired are successfully paired.

Post-processing SINR is the most important indicator of the flag throughput. It has a mapping relationship with system performance parameters such as channel quality, system capacity, and spectrum efficiency. It can reflect the change in system throughput, which can reflect the user performance gain after pairing. Therefore, the post-processing SINR can be used as an evaluation index for judging whether the first user can successfully pair with the first user. The higher the user's SINR, the smaller the interference, the higher the system throughput, and the better the matching effect.

Optionally, the channel quality and spectrum efficiency of the SINR mapping can be used to determine whether the first user and the second user can be successfully paired. Optionally, the user transmit power can also be calculated by using the SINR to represent the user performance gain after the pairing, so as to determine whether the first user and the second user can be successfully paired. For the specific judgment process, reference may be made to related content in the foregoing method embodiments, and details are not described herein.

The existing matching method can be used to determine the performance gain of the system after the pairing, indicating that the first user and the second user are successfully paired, and the pairing process is ended. The pairing subunit 4032 can send a message to the user to select. Unit 401, reselecting one user in the scheduled user set and the unscheduled user set to perform a pairing attempt; If the system fails to meet the performance requirement of the paired performance gain, it indicates that the first user fails to pair with the second user, and the pairing subunit 4032 can send a message to the user selection unit 401 to reselect one of the unscheduled user sets. The user makes a pairing attempt with the first user until the pairing is successful, or traversing the unscheduled user set, and no user can successfully pair with the first user, then the pairing is ended.

Optionally, the SINR calculation sub-unit 4033 is further configured to: obtain, by using channel information in the serving cell of the first user, an SINR of the serving cell of the first user, by using the Correcting, by the first user, the SINR gain obtained in the shared cooperation set, the SINR of the serving cell of the first user, to obtain the first SINR; and configured to use the serving cell of the second user The channel information in the network, the SINR of the serving cell of the second user is obtained, and the SINR of the second serving cell is corrected by using the SINR gain obtained by the second user in the shared cooperation set, to obtain the second SINR.

In this embodiment, the SINR of the first user in the cooperative set is SINR1, and in the absence of the cooperative set, the SINR in the serving cell is SINR2, and the SINR gain is SINR2-SINR1 (unit: db). According to the same calculation method, the SINR gain of the second user can be obtained. The SINR gain may be used to correct the SINR of the first user or the second user only in the serving cell, and the modified post-processing SINR may be used to map to the spectrum efficiency or the transmit power, and calculate the matched performance gain. The modified mapping and calculation method are described in the foregoing method embodiments, and are not described herein.

Optionally, in order to ensure the coordinated performance of the scheduled users, when calculating the union of the collaboration set, the scheduled users may be mainly considered, and the actual processing capability of the system is considered, if the SINR is processed later. The correction will affect the system performance, and the correction of the post-processing SINR can be dominated by the scheduled users.

In another embodiment, the SINR determining subunit 5041 is further configured to: calculate, by using channel information in the shared cooperation set, a first SINR of the first user; Channel information in the serving cell, determining a second SINR of the second user.

In another embodiment, the SINR determining subunit 5041 is further configured to: calculate, by using channel information in a serving cell of the first user, a first SINR of the first user; The channel information in the union is used to calculate a second SINR of the second user.

In this embodiment, the gain of the V-MIMO pairing is considered indirectly, and the H and Ruu in the shared set of the shared layer are not required to be reported by the base station physical layer, and the physical layer of the base station does not need to calculate the first user and the second user. The SINR within the collaboration set is small in measurement and small in computational complexity. Further, the SINR of the user to be paired is obtained by different calculation methods and used for performance gain evaluation after pairing, and the system with different computing processing capability can be applied, which improves the efficiency and accuracy of the pairing process.

The base station provided by the embodiment of the present invention determines a set of users to be paired in a cell, and selects a union set of the users to be paired as a shared collaboration set, and in particular, configures a coordinated cell for the to-be-paired user that is a non-cell edge user. Further expanding the cooperation set range of the users to be paired, so that the users to be paired can obtain a higher SINR gain, so that there is a better chance of selecting the most suitable paired users to be paired, thereby improving the probability of success of the pairing, and obtaining more High pairing gain to reduce inter-cell interference and improve system Throughput, the purpose of increasing user data transfer rate. Further, the pairing process can be adaptively modified according to the computing processing capability of the base station, and the pairing efficiency and accuracy are improved.

The embodiment of the present invention provides a base station. As shown in FIG. 5, the base station may be an evolved node e-NodeB in an LTE communication system or a similar device in an LTE subsequent evolution system. The functions of the base station and its internal modules provided in this embodiment may implement the steps of the foregoing method embodiments.

The base station may include a control base station 501, and the control base station 501 communicates with other parts of the base station via a communication bus 502, and other parts of the base station include, but are not limited to, for example, a transceiver 503 and or a power supply unit 504. Or the transmission part, or the alarm part, or the antenna part, or the operation and maintenance part, those skilled in the art can understand that the base station can have different components according to different implementation manners, which is not limited in this embodiment. Do an exhaustive example.

The communication bus can be a local bus.

The base station may also include a communication interface 505 for performing information interaction with other base stations. For example, the communication interface 505 can be an X2 interface. The X2 interface defines a point-to-point connection between the base station and the base station in a logical manner. The specific implementation of the physical layer may be a copper cable, a microwave, an optical fiber, or the like, and is not particularly limited herein.

The control base station 501 includes a memory 5011, a processor 5012, and a communication link 5013. The memory 5011 may be a type of memory/media in the prior art such as a flash memory or a random access memory (RAM), which is not particularly limited herein.

The processor 5012 may be a multi-core processor or may be geographically dispersed The processor connected by the communication link may be a central processing unit (CPU), a digital signal processor (DSP) or other special processor.

Optionally, the memory 501 and the processor 502 may be integrated in a baseband processing unit (BBU) of the base station.

The memory 5011 can be used to store some instructions.

The processor 5012 can communicate with the memory 4011 via the communication link 5013.

The instruction stored in the memory 5011 is executed by the processor 5012, and the control base station 501 can enable the base station to implement a user scheduling method of a virtual multiple input and output system, where the method includes: selecting has been performed The first user of the data transmission schedule, the first user is configured with a first cooperation set; the first cooperation set includes a serving cell and a coordinated cell of the first user.

Selecting a second user that does not perform data transmission scheduling, the second user is configured with a second cooperation set; and the second cooperation set includes a serving cell and a collaboration cell of the second user.

The method for selecting the first user may be various methods in the prior art, such as a polling selection, a random selection, a proportional fair selection, and the like, which are not specifically limited in the embodiment of the present invention. The second pair of user selection methods may also be various methods in the prior art, such as random selection, proportional fair selection, orthogonal selection, etc., in the embodiment of the present invention. This is not particularly limited.

In another embodiment of the present invention, as shown in FIG. 8, the processor 5012 may further include an operator 5012a, a general-purpose register 5012b, and a control component 5012c. The control component may further include an instruction decoder 5012c. (1) The operation controller 5023c (2) may use the arithmetic unit 5012a to perform arithmetic and logical operation operations of the instructions stored in the memory 5011.

The general-purpose register 5012b can be used to store register operands temporarily stored in the process of executing the instructions stored in the memory 5011 and intermediate operation results.

The control unit 5012c may include an instruction decoder 5012c(1) for decoding instructions stored in the memory 5011 and issuing control signals for performing various operations to be performed for each instruction, the operation controller 5012c (2) for receiving the control signal to complete a specific operation of the instruction. The control unit 5012c may be a micro-program control chip with a micro-storage as a core or a control circuit with a logical hard-wired structure as the main control, which is not limited in the embodiment of the present invention.

The devices in the processor 5012 can communicate with each other, or the devices can be integrated into one hardware.

Optionally, the memory 5011 may further store some instructions. After the processor 5012 executes the instruction, the control base station 501 may enable the coordinated cell of the first user to include the first user. a cooperative cell of the second type and a coordinated cell of the second type; or the coordinated cell of the first user is a second type of coordinated cell.

The first type of coordinated cell includes a neighboring cell of the serving cell of the first user, the RSRP of the neighboring cell of the serving cell of the first user, and the first user in the serving cell The RSRP difference is within the preset threshold.

The second type of coordinated cell includes a neighboring cell of the serving cell of the first user, and the neighboring cell of the serving cell of the first user includes a user having the same RB as the first user, and the first user The coordinated cell of the user in the neighboring cell of the serving cell that has the same resource block as the first user is the serving cell of the first user.

Determining the second type of coordinated cell, the cooperative cell may be configured for the first user belonging to the non-cell edge user, and the range of the coordinated set of the non-cell edge user may be extended, and the second type of coordinated cell may send the non-cell edge user to the serving cell The interference generated when the signal is transmitted is converted into an available signal, and cooperative communication with the serving cell suppresses the neighboring cell interference, improves the SINR of the non-cell edge user, increases the range of users that can be used for pairing, and improves the success rate of the pairing, further By pairing between users with coordinated cells, a larger pairing gain can be obtained, increasing system throughput.

Optionally, the memory 5011 further stores some instructions. After the processor 5012 is executed, the control base station 501 may enable the base station to determine a cooperative cell for the second user. Since the second user is an unscheduled user, there is no interaction of the neighboring cell scheduling information, and only the first type of coordinated cell is present.

For a specific method for selecting the coordinated cell of the first user or the second user, reference may be made to the related description in other embodiments of the present invention, which is not described herein. The pairing manner of the first user and the second user may be various manners in the prior art, for example, an orthogonal matching algorithm, a random matching algorithm, a determinant pairing algorithm, etc., which are not specifically limited in this embodiment of the present invention. .

Optionally, the memory 5011 further stores some instructions. After the processor 5012 is executed, the control base station 501 may enable the base station to select a collaboration set shared by the first user and the second user, where the shared The collaboration set is a union of the first collaboration set and the second collaboration set. The first user and the second user are paired using the union of the collaboration sets. The method for selecting the union of the collaboration sets can be referred to the related description in other embodiments of the present invention, and is not described herein.

Further, the memory 5011 further stores some instructions. After the processor 5012 is executed, the control base station 501 may enable the base station to calculate a first SINR of the first user in the shared collaboration set. Calculating a second SINR of the second user in the shared collaboration set, and determining that the first user can be paired with the second user.

Specifically, the processor 5012 can obtain the first user and the second user in total. The cooperation collects the corresponding channel information, calculates the post-processing SINR of the first user and the second user, and determines whether the first user and the second user to be paired are successfully paired.

Optionally, the channel quality and spectrum efficiency of the SINR mapping can be used to determine whether the first user and the second user can be successfully paired. Optionally, the user transmit power can also be calculated by using the SINR to represent the user performance gain after the pairing, so as to determine whether the first user and the second user can be successfully paired. For a specific judgment process, reference may be made to related descriptions in other embodiments of the present invention, and details are not described herein.

If the system meets the requirements of the performance gain after the pairing, the first user is successfully paired with the second user, and the pairing process is ended. The processor 5012 can be in the scheduled user. Each of the set and unscheduled user sets reselects a user to perform a pairing attempt; if the system fails to meet the performance requirement of the paired performance gain, indicating that the first user fails to pair with the second user, the processor 5012 may send Reselecting a user in the unscheduled user set to perform a pairing attempt with the first user until the pairing is successful, or traversing the unscheduled user set, no user can If the pairing with the first user is successful, the pairing ends.

Optionally, the memory 5011 further stores some instructions. After the processor 5012 is executed, the control base station 501 may enable the base station to use the channel information in the serving cell of the first user to obtain the SINR of the serving cell of the first user, and correcting the SINR of the serving cell of the first user by using the SINR gain obtained by the first user in the shared cooperation set, to obtain the first SINR; The base station may acquire the SINR of the serving cell of the second user by using the channel information in the serving cell of the second user, and use the SINR gain obtained by the second user in the shared cooperation set. The second serving cell SINR is corrected to obtain the second SINR.

In this embodiment, the SINR of the first user in the cooperative set is SINR1, and in the absence of the cooperative set, the SINR in the serving cell is SINR2, and the SINR gain is SINR2-SINR1 (unit: db). According to the same calculation method, the SINR gain of the second user can be obtained. The SINR gain may be used to correct the SINR of the first user or the second user only in the serving cell, and the modified post-processing SINR may be used to map to the spectrum efficiency or the transmit power, and calculate the performance gain after the pairing. The modification method and the modified mapping and calculation method are described in the foregoing method embodiments, and are not described herein.

Optionally, to ensure the collaboration performance of the scheduled users, when calculating the union of the collaboration set, the scheduled users may be the main ones, and the actual processing capability of the system may be considered. If the SINR correction affects the system performance, the post-processing is performed. The SINR correction can be based on the scheduled users. Correcting the calculated SINR in the serving cell, indirectly considering the gain of the cell cooperation for the V-MIMO pairing, without requiring the base station physical layer to report the H and Ruu in the shared cooperative set, and the base station physical layer does not need to calculate the first user and The SINR in the collaboration set shared by the second user has a small measurement amount and a small computational complexity. Further, the SINR of the user to be paired is obtained by different calculation methods and used for the performance gain evaluation after the pairing, and the system with different computing processing capabilities can be applied, and the efficiency and accuracy of the pairing process are improved.

The "communication" or "communication bus" in the embodiment of the present invention may be direct communication or indirect communication; or may be logical communication or physical connection communication; or may be point-to-point communication, or use bus communication, the present invention The embodiment does not limit this.

The user scheduling method provided by the embodiment of the present invention determines a set of users to be paired in a cell, and selects a union set of the users to be paired as a shared collaboration set, and expands the scope of the user collaboration set, and the user can obtain a higher SINR. Gain, there is a better chance to choose the most suitable user to be paired, which improves the probability of pairing success. Furthermore, V-MIMO pairing between cells can achieve better pairing gain, reduce inter-cell interference, and improve system. Throughput, improve coverage at the cell edge and increase the rate of user data transmission. Further, the adaptability of the pairing process can be modified according to the computing processing capability of the base station, and the pairing efficiency and accuracy are improved.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device, the module and the unit described above may refer to the corresponding process in the foregoing method embodiment, and details are not described herein again. .

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course To pass the hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A computer device (which may be a personal computer, server, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners without departing from the scope of the present application. For example, the base station embodiment described above is only illustrative. For example, the division of the module or unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. The units described as the separate components may or may not be physically separated, and the components displayed as the unit 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 modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort. In addition, the described systems, devices, and methods, and the schematic diagrams of various embodiments, may be combined or integrated with other systems, modules, techniques or methods without departing from the scope of the present application. Another point, the mutual coupling or direct coupling or communication connection shown or discussed It may be an indirect coupling or communication connection through some interface, base station or unit, and may be in electronic, mechanical or other form. The above is only the 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. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

1. A base station, characterized in that it includes a control device, and the control base station communicates with other parts of the base station through a communication bus;

The control device includes: memory, processor, communication link;

The memory is used to store instructions;

The processor communicates with the memory through the communication link; after some instructions stored in the memory are executed by the processor, the control device enables the base station to implement a virtual multi-input The user scheduling method of the output system includes:

Select the first user who has performed data transmission scheduling, and the first user has a first coordination set; the first coordination set includes the serving cell and the coordination cell of the first user; select the second user who has not performed data transmission scheduling user, the second user has a second cooperation set; the second cooperation set includes the serving cell and the cooperation cell of the second user; using the first cooperation set and the second cooperation set, the The first user is paired with the second user.

2. The base station according to claim 1, characterized in that,

After some instructions stored in the memory are executed by the processor, the control device causes the coordinated cell of the first user to include the first type of coordinated cell and the second type of coordinated cell of the first user; or the The cooperative cell of the first user is a second type of cooperative cell;

The first type of coordinated cells includes neighboring cells of the first user's serving cell, and the reference signal received power RSRP of the neighboring cells of the first user's serving cell is the same as that of the first user. The difference in RSRP of the user in the serving cell is within the preset threshold range; the second type of cooperative cells includes neighboring cells of the first user's serving cell, and the neighboring cells of the first user's serving cell Includes users who have the same radio resource blocks as the first user, and the cooperative cell of the user who has the same resource blocks as the first user in the neighboring cells of the serving cell of the first user is the first user service area.

3. The base station according to claim 1 or 2, characterized in that the memory also stores some instructions, and after the processor executes the control device, the control device causes the base station to use the first user and the A collaboration set shared by the second user to pair the first user with the second user;

The shared cooperation set is the union of the first cooperation set and the second cooperation set.

4. The base station according to claim 3, characterized in that the memory also stores some instructions, and after execution by the processor, the control device causes the base station to obtain the information of the first user in the shared information. The first signal-to-interference-noise ratio SINR within the cooperation set;

And, obtain the second SINR of the second user in the shared cooperation set; and, based on the first SINR and the second SINR, determine that the first user can be paired with the second user.

5. The base station according to claim 4, characterized in that the memory also stores a section of instructions, and after execution by the processor, the control device causes the base station to utilize the channel information in the shared cooperative set , calculate the first SINR;

And, the second SINR is calculated using the channel information in the shared cooperative set.

6. The base station according to claim 4 or 5, characterized in that the memory also stores an instruction, and after the processor executes it, the control device uses the channel information in the serving cell of the first user. , obtain the SINR of the serving cell of the first user, use the SINR gain obtained by the first user in the shared coordination set to correct the SINR of the serving cell of the first user, and obtain the first SINR ;

And, use the channel information in the second user's serving cell to obtain the SINR of the second user's serving cell, and use the SINR gain obtained by the second user in the shared coordination set to calculate the first The serving cell SINR is corrected to obtain the second S earned.

7. A base station, characterized by: including,

The user selects the unit, the collaboration set determines the unit, and the control unit;

The user selection unit is configured to select a first user who has performed data transmission scheduling, and to select a second user who has not performed data transmission scheduling;

The cooperative set determining unit is configured to use the serving cell and the cooperative cell of the first user as the first cooperative set of the first user; and to use the serving cell and the cooperative cell of the second user as the first cooperative set. The cell serves as the second coordinated set of the second user;

The control unit, in communication with the user selection unit, or with the user selection unit and the cooperation set determination unit, is configured to utilize the first cooperation set and the second cooperation set, to The first user and the second user are paired.

8. The base station according to claim 7, wherein the cooperation set determination unit is specifically configured to: determine a cooperative cell of the first user, and the cooperative cell includes a third cooperative cell of the first user. A type of coordinated cell and a second type of coordinated cell; or the third type of coordinated cell The cooperative cell of a user is a second type of cooperative cell;

The first type of coordinated cells includes neighboring cells of the first user's serving cell, and the difference between the reference signal received power RSRP of the neighboring cells of the first user's serving cell and the first user's RSRP in the serving cell The value is within the preset threshold range;

The second type of coordinated cells includes neighboring cells of the first user's serving cell, and the neighboring cells of the first user's serving cell include users with the same radio resource block as the first user, and the third A cooperating cell of a user that has the same resource block as the first user in a neighboring cell of a user's serving cell is the first user's serving cell.

9. The base station according to claim 7 or 8, characterized in that the control unit further includes a shared cooperation set selection subunit and a pairing subunit;

The shared collaboration set selection subunit is configured to select a collaboration set shared by the first user and the second user, and the shared collaboration set is a combination of the first collaboration set and the second collaboration set. Union;

The pairing subunit is configured to use the collaboration set shared by the first user and the second user selected by the shared collaboration set selection subunit to perform matching on the first user and the second user. pair.

10. The base station according to claim 9, characterized in that, the control unit further includes a SINR calculation subunit, the SINR calculation subunit communicates with the shared cooperative set selection subunit and the pairing subunit,

The SINR calculation subunit is configured to obtain the first SINR of the first user in the shared collaboration set; and, is configured to obtain the second user in the shared collaboration set. Second SINR within the set; The pairing subunit is specifically configured to use the first SINR of the first user in the shared cooperation set and the second user in the shared cooperation set obtained by the SINR calculation subunit. The second SINR in the cooperation set determines that the first user can be paired with the second user.

11. The base station according to claim 10, wherein the SINR calculation subunit is specifically configured to calculate the first SINR using channel information in the shared cooperative set; and, Configured to calculate the second SINR using channel information in the common cooperative set.

12. The base station according to any one of claims 10 or 11, characterized in that the SINR calculation subunit is specifically configured to use channel information in the serving cell of the first user to obtain the The SINR of the serving cell of the first user is modified by using the SINR gain obtained by the first user in the shared coordination set to obtain the first SINR; and, Configured to: utilize the channel information in the serving cell of the second user to obtain the SINR of the serving cell of the second user, and use the SINR gain obtained by the second user in the shared coordination set to calculate the SINR of the serving cell of the second user. The SINR of a serving cell is modified to obtain the second SINR.

13. A user scheduling method, characterized by:

The base station selects the first user who has performed data transmission scheduling, and the first user has a first cooperative set;

The first coordination set includes the serving cell and the coordination cell of the first user; the base station selects a second user that does not perform data transmission scheduling, and the second user has a second coordination set; The second coordination set includes the serving cell and the coordination cell of the second user; the base station uses the first coordination set and the second coordination set to perform the communication between the first user and the second user. pair.

14. The method according to claim 13, characterized in that the coordinated cells of the first user include: the first type of coordinated cells and the second type of coordinated cells of the first user; or the first type of coordinated cells of the first user. The cooperative community is the second type of cooperative community;

15. The method according to any one of claims 13 or 14, characterized in that, the base station uses the first cooperation set and the second cooperation set to coordinate the first user with the second user. Pairing, specifically includes,

Pair the first user with the second user according to the collaboration set shared by the first user and the second user;

16. The method according to claim 15, wherein the base station uses the first cooperation set and the second cooperation set to pair the first user with the second user, specifically including: , Obtain the first SINR of the first user in the shared collaboration set;

Obtain the second SINR of the second user in the shared collaboration set;

Based on the first SINR and the second SINR, it is determined that the first user can be paired with the second user.

17. The method according to claim 16, wherein the obtaining the first SINR of the first user in the shared collaboration set specifically includes:

The first SINR is calculated using the channel information in the shared cooperative set; the obtaining the second SINR of the second user in the shared cooperative set specifically includes:

The second SINR is calculated using the channel information in the common cooperative set.

18. The method according to claim 17, wherein the obtaining the first SINR of the first user in the shared collaboration set specifically includes:

Utilize the channel information in the first user's serving cell to obtain the SINR of the first user's serving cell, and use the SINR gain obtained by the first user in the shared coordination set to calculate the SINR of the first user's serving cell. The SINR of the serving cell is modified to obtain the first SINR;

The obtaining the first SINR of the first user in the shared collaboration set specifically includes:

Utilize the channel information in the serving cell of the second user to obtain the SINR of the serving cell of the second user, and use the SINR gain obtained by the second user in the shared cooperation set to calculate the SINR of the first serving cell. The SINR is modified to obtain the second SINR.