TWI452921B - Method and apparatus for scheduling user equipment in cellular communication system - Google Patents

Description

Method and device for performing user equipment scheduling in cellular communication system

The present invention relates to the field of communications, and more particularly to a method and apparatus for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission.

In a cellular communication system, user equipment at the boundaries of a cell typically suffers from signal interference from other cells due to weak signals, and thereby results in poor signal quality. In order to meet the requirements of LTE-A in terms of system capacity, instantaneous peak data rate, spectrum, cell edge user throughput and delay, coordinated multi-point (CoMP) technology has been proposed to improve system performance.

In general, according to different data processing methods, CoMP technology can be divided into two types, one is coordinated scheduling/coordinating beamforming (referred to as CS/CB) technology and the other is joint transmission (referred to as JT) technology. .

Currently, CoMP technology is mainly used in four situations. The CoMP technology applied to the first and second application scenarios has been discussed in the first phase of 3GPP for CoMP, and the CoMP technology applied to the third and fourth application scenarios has been widely noted and discussed. CoMP in the third and fourth application scenarios essentially belongs to inter-site CoMP, which has strict loadback/synchronization/complexity requirements. If JT CoMP technology is used, it usually cannot meet these strict requirements, and therefore, CS/CB CoMP technology is usually used.

However, CS/CB CoMP technology is generally adapted to FDD systems and is not adapted for use in TDD systems. Therefore, there are solutions to the strict requirements for CoMP technology that are adapted to both FDD systems and TDD systems and that meet the inter-site CoMP technology. The needs of the resolution.

In response to the above problems, a solution for scheduling user equipment in a coordinated multipoint (CoMP) joint transmission (JT) based cellular communication system is provided in the present invention. The solution can be adapted to both FDD systems and TDD systems while meeting the stringent requirements of CoMP technology between sites.

According to a first aspect of the present invention, a method for scheduling a user device in a cellular communication system based on coordinated multipoint joint transmission is provided, wherein the cellular communication system includes executing a first schedule Serving a marco base station of a first set of user equipment and performing a second schedule to serve a mirco base station of a second set of user equipment. The method includes: determining adjustment information based on the first schedule and the second schedule; and transmitting the adjustment information to the micro base station to adjust a user equipment to be transmitted to one of the second user equipment sets data.

According to a second aspect of the present invention, a method for scheduling a user device in a cellular communication system based on coordinated multipoint joint transmission is provided, wherein the cellular communication system includes executing a first schedule Serving a macro base station of a first user equipment set and performing a second schedule to serve a micro base station of a second set of user equipment. The method includes: receiving adjustment information from the mega base station, wherein the adjustment information is based on the first schedule and the second schedule determination; and adjusting the to-be-transmitted to the second user equipment set based on the adjustment information Information about a user device.

According to a third aspect of the present invention, there is provided a method for A device for scheduling a user equipment in a cellular communication system of a point-synchronized transmission, wherein the cellular communication system includes performing a first schedule to servo a macro base station of a first user equipment set and performing a second The schedule is to serve as a micro base station for one of the second set of user devices. The apparatus includes: an adjustment information determining component configured to determine adjustment information based on the first schedule and the second schedule; and configured to send the adjustment information to the micro base station for adjustment to be transmitted to the A transmitting component of the data of one of the user devices in the second set of user devices.

According to a fourth aspect of the present invention, an apparatus for scheduling a user equipment in a cellular communication system based on coordinated multipoint joint transmission is provided, wherein the cellular communication system includes performing a first schedule Serving a macro base station of a first user equipment set and performing a second schedule to serve a micro base station of a second set of user equipment. The apparatus includes: a receiving component configured to receive adjustment information from the jumbo base station, wherein the adjustment information is based on the first schedule and the second schedule determination; and configured to adjust based on the adjustment information An adjustment component that transmits data to one of the user devices in the second set of user devices.

Other features and advantages of the present invention will be apparent from the description of the accompanying drawings.

Throughout the drawings, the same reference symbols have the same or similar features or functions.

Other objects and effects of the present invention will become more apparent and easier to understand, and a more comprehensive understanding of the present invention. solution.

A more detailed description of embodiments of the invention is provided by the accompanying drawings. The drawings and the embodiments of the present invention are intended to be illustrative only and not limiting.

The flowchart and block diagrams in the figures illustrate systems, methods and architectures, functions and operations that can be executed by a computer program product in accordance with various embodiments of the present invention. In this regard, each block of the flowchart or block diagram can represent a module, a program segment, or a portion of a code that contains one or more executable instructions for performing the specified logical functions. It should be noted that in some alternative implementations, the functions indicated in the blocks may occur differently than the order shown in the figures. For example, two blocks shown in succession can sometimes be executed in substantially parallel or reverse order, depending upon the functionality involved. It is further noted that each block and combination of blocks in the block diagrams or flowcharts can be implemented by a dedicated hardware-based system for performing the specified functions or operations or a combination of special hardware and computer instructions. It should be noted that the drawings and embodiments of the present invention are only illustrative of the present invention and are not intended to limit the scope of the invention. Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In the present invention, the User Equipment (UE) may be various types of terminals such as a mobile phone, a personal digital assistant (PDA), a portable computer, and the like. The base station (for example) may be an eNodeB or an eNB or the like. A giant base station, for example, can be, for example, a giant eNB that can manage a giant cell. The micro base station, for example, can be, for example, a micro eNB or a pico eNB that can manage a pico cell or a pico cell.

It should be noted that although the present invention mainly uses a pico eNB as a micro base An example of a station, but which is merely illustrative and any other suitable example may be used to implement the technical solution of the present invention.

The present invention is primarily focused on scheduling user devices in a cellular communication system based on coordinated multipoint joint transmission in the 11th edition. In an embodiment in accordance with the invention, the micro base station only serves its own user equipment (eg, the pico eNB only serves the pico UE); the giant base station can serve its own user equipment and can also serve The user equipment of the micro base station (for example, the giant eNB can serve the giant UE and can also serve the pico UE); and the giant CoMP in the location can be performed without affecting the implementation of the solution of the present invention. In another embodiment according to the present invention, in addition to the content described in the above embodiments, the macro cell does not change the resource scheduling result and the precoding layer number of the micro cell, and the jumbo cell can determine the modulation and coding scheme. (MCS) and/or demodulation variable reference signal (DMRS). In another embodiment in accordance with the present invention, in addition to the description of the above two embodiments, when a corresponding user equipment (e.g., one or more pico UEs) in a macrocell servo microcell, the microcell The data to be transmitted to the UE can be adjusted (eg, rotated phase) to achieve a coherent combination of signals to achieve an enhancement of the data signal.

1 is a flow chart of a method for scheduling user equipment in a cellular communication system based on coordinated multi-point joint transmission, in accordance with an embodiment of the present invention. The embodiment illustrated in Figure 1 can be performed by a giant base station in a cellular communication system or by any other suitable device available to those skilled in the art.

The cellular communication system in the embodiment illustrated in FIG. 1 includes: executing one The first schedule is to serve a giant base station of a first set of user equipment; and a second schedule is executed to serve a micro base station of a second set of user equipment.

In step S101, the adjustment information is determined based on the first schedule and the second schedule, wherein the first schedule is executed by the giant base station to serve the first user equipment set, and the second schedule system Executed by the micro base station to servo the second set of user equipment.

In an embodiment of the present invention, a first channel matrix and a first precoding matrix for one of the user equipments in the first user equipment set may be obtained based on one of the first schedules. And obtaining, according to one of the results of the second schedule, a second channel matrix and a second precoding matrix for one of the user equipments in the second set of user equipment, and then based on the first pre- The coding matrix, the first channel matrix, the second precoding matrix, and the second channel matrix determine the adjustment information.

In another embodiment of the present invention, the determining the adjustment information based on the first precoding matrix, the first channel matrix, the second precoding matrix, and the second channel matrix may be implemented by the following steps Selecting, from the first precoding matrix, a sub precoding matrix corresponding to the second precoding matrix; selecting, from the first channel matrix, a subchannel matrix corresponding to the second channel matrix; and based on the second preamble The encoding matrix, the second channel matrix, the sub-precoding matrix, and the sub-channel matrix calculate a phase adjustment matrix as the adjustment information.

In an embodiment of the present invention, the result of the second schedule may include: the micro base station and the second user equipment set Channel Status Information (CSI) of the channel(s) between the user devices. The channel status information is information about the channel status between the receiver and the transmitter. The channel status information may include a channel quality indicator (CQI), a precoding matrix index (PMI), a rank indicator (RI), and the like. The corresponding channel matrix and precoding matrix can be determined by utilizing various methods existing in the prior art and based on channel state information.

In an embodiment in accordance with the invention, the result of the second schedule may comprise one or more of: 微型 a micro base station and the second set of user devices (these) CSI of the channel(s) between the user devices; 序号 the number of the (the) user devices in the second set of user devices; 该 the (the) of the second set of user devices a precoding layer number of the user equipment; 资源 a resource allocated to the (the) user equipment in the second user equipment set; and ̇ a demodulation variable reference signal (DMRS).

According to an embodiment of the present invention, the precoding layer number of the user equipment may be determined by the jumbo base station; in this case, the result of the second schedule may not include the content. According to an embodiment of the invention, the DMRS may also be determined by the jumbo base station; in this case, the result of the second schedule may also not include the DMRS.

In an embodiment in accordance with the invention, the result of the second schedule is received from a micro base station.

In step S102, the adjustment information is sent to the micro base station to adjust data to be transmitted to one of the user equipments in the second user equipment set.

According to an embodiment of the present invention, in addition to transmitting the determined adjustment information to the micro base station, one or more of the following may be transmitted to the micro base station: ̇ A selected modulation and coding scheme And 资料 data to be transferred from the micro base station to the user equipment in the second set of user equipment.

In an embodiment of the present invention, a method for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission may also be based on the adjustment information, use in the first user equipment set The capacity of the device and the capacity of the user device in the second user device set select a user device to be served from the first user device set and the second user device set.

According to an embodiment of the present invention, the program for selecting a user device to be served from the first user equipment set and the second user equipment set may be implemented by: adjusting information according to the The capacity of the user devices in the second set of user devices obtains the adjusted capacity of the user devices in the second set of user devices; obtaining the first user based on the first schedule The capacity of the user devices in the set of devices; and then the capacity of the user devices in the first set of user devices and the user devices in the second set of user devices The adjusted capacity selects a user to be servoed Ready.

Next, the flow in Fig. 1 ends.

2 is a flow chart of a method for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission, in accordance with another embodiment of the present invention. The embodiment illustrated in Figure 2 can be performed by a giant base station in a cellular communication system or by any other suitable device available to those skilled in the art.

Similar to the embodiment illustrated in FIG. 1, the cellular communication system in the embodiment illustrated in FIG. 2 also includes performing a first schedule to servo a macro base station of a first user equipment set, and executing one The second schedule is to serve as a micro base station for one of the second set of user devices.

In step S201, a first channel matrix and a first precoding matrix for one of the user equipments in the first user equipment set are obtained based on one of the first schedules.

In this embodiment, the first schedule is performed by a giant base station. By performing the first schedule, the mega base station can, for example, know the respective capacities of its user equipment (eg, UE1, UE2, UE3, UE4, and UE5) and select the user equipment from the user equipments. A group (for example, UE1 and UE2 is selected) for servoing. This first schedule can be implemented by various methods known in the art. A group of user devices that are served by a giant base station by performing the first schedule is referred to as a first set of user devices. In this example, the first user equipment set includes two user equipments, namely UE1 and UE2, respectively.

With the first schedule, the megabase can be obtained by various existing methods and methods. The channel matrix and precoding matrix of the channel between the platform and its servo user equipment. For example, a giant base station can obtain the CSI of the channel, and then obtain a channel matrix based on the CSI, and can obtain a precoding matrix by using a conventional algorithm in the art. Such conventional algorithms may be, for example, SVD decomposition algorithms, zero-forcing (ZF) algorithms, block diagonal (BD) algorithms, and the like.

In order to distinguish from the channel matrix and the precoding matrix obtained by the micro base station, the channel matrix and the precoding matrix for the user equipment in the first user equipment set obtained based on the result of the first scheduling are called The first channel matrix and the first precoding matrix.

In the embodiment illustrated in Fig. 2, it is assumed that there are 24 antennas in a giant base station having 3 giant cells, and each giant cell has 8 antennas. It is also assumed that the micro base station has 8 antennas. In addition, it is assumed that the user equipment has two antennas. When the giant base station serves K UEs after performing the first schedule, the first channel matrix is represented as , which is a channel matrix between K UEs and 3 macro cells served by a giant base station; and represents the first precoding matrix as Where k represents the kth UE of the K UEs and L _k represents the layer number of the kth UE.

At step S202, the result of the second schedule is received from the micro base station.

The second schedule is performed by a micro base station. By performing the second scheduling, the micro base station can, for example, know the respective capacities of its user equipment (eg, UE6, UE7, UE8, UE9, and UE10) and select user equipment from such user equipments. A group (for example, UE6 and UE7 is selected) for servoing. The second schedule can be implemented by various methods known in the art. Shi. A group of user devices that are served by the micro base station by performing the second schedule is referred to as a second set of user devices. In this example, the second set of user equipments includes two user equipments, namely UE6 and UE7, respectively.

Similar to the first schedule, the CSI of the channel between the micro base station and the second set of user equipment (i.e., the user equipment served by the micro base station) can be obtained by the second schedule. In an embodiment in accordance with the invention, receiving one of the second schedules from the micro base station results in receiving a channel between the micro base station and the user equipment in the second set of user equipment CSI.

In another embodiment in accordance with the invention, the result of the second schedule includes at least one of: the plurality of: the second set of user devices further receivable from the micro base station a serial number of the user equipment; a precoding layer number of the user equipment(s) in the second user equipment set; resources allocated to the user equipment(s) in the second user equipment set; The (multiple) demodulation variable reference signal.

In step S203, a second channel matrix and a second precoding matrix for one of the user equipments in the second user equipment set are obtained based on the result of the second scheduling.

As described above, a corresponding channel matrix can be obtained based on the CSI of the channel between the micro base station and its servo user equipment; and then, a corresponding precoding matrix can be obtained by one of the techniques of the prior art.

In order to distinguish from the channel matrix and the precoding matrix obtained by the giant base station, the result obtained based on the second schedule is used for the second user setting. The channel matrix and the precoding matrix of the user equipment in the standby set are referred to as a second channel matrix and a second precoding matrix.

In the embodiment illustrated in FIG. 2, it is assumed that the micro base station serves P UEs after performing the second scheduling, and the channel matrix (ie, the second channel matrix) between the P UEs and the micro base station is represented. for And the second precoding matrix is represented as Where p denotes the pth UE of the P UEs and L _p denotes the layer number of the pth UE.

In step S204, one sub-precoding matrix corresponding to the second pre-coding matrix is selected from the first pre-coding matrix.

In an embodiment as illustrated in FIG. 2, one sub-precoding matrix corresponding to the second precoding matrix is selected from the first precoding matrix. . Therefore, the selected sub-precoding matrix has the same size as the second pre-coding matrix, that is, the number of columns of the matrix and the number of rows are equal. In this embodiment, to be selected from the first precoding matrix The subcode precoding matrix is .

In step S205, a subchannel matrix corresponding to one of the second channel matrices is selected from the first channel matrix.

In the embodiment as illustrated in FIG. 2, one of the subchannel matrices corresponding to the second channel matrix is selected from the first channel matrix. . Therefore, the selected sub-channel matrix has the same size as the second channel matrix, that is, the number of columns of the matrix and the number of rows are equal. In this embodiment, to be selected from the first channel matrix The subchannel matrix is .

In step S206, based on the second precoding matrix, the second channel moment The matrix, the sub-precoding matrix and the sub-channel matrix calculate a phase adjustment matrix.

In an embodiment in accordance with the invention, the phase adjustment matrix (eg, denoted as M _Adjust ) is a diagonal matrix, and the diagonal elements of the matrix are represented as And the phase adjustment matrix can be expressed as

Therefore, in step S206, it is necessary to calculate each diagonal element in the phase adjustment matrix. In one implementation, each diagonal element can be calculated by the following equation.

In equation (1), "(:, s)" represents all column elements of the sth row in the matrix; The following symbol "'" indicates conjugate transposition; and "angle" indicates the operation for calculating the angle.

In equation (1) and It can be calculated by equations (2) and (3):

In step S207, the adjustment information is transmitted to the micro base station.

In step S208, the adjusted capacity of the user equipments in the second user equipment set is obtained based on the adjustment information and the capacities of the user equipments in the second user equipment set.

In an embodiment of the present invention, assuming that the kth UE in the second set of user equipment is scheduled by the mega base station, the user equipment in the second user equipment set is during the scheduling period. Capacity It can be calculated by the following formula:

In equation (4), " f " represents an operation (e.g., logarithm, etc.) for obtaining a corresponding device capacity based on knowledge or techniques known in the art. Then, by self during the second schedule Subtract the capacity of the kth UE The effective capacity of the kth UE when scheduled by both the giant base station and the micro base station can be obtained, which is:

In this embodiment, the adjusted capacity of the user equipment in the second set of user equipment is an effect capacity _Ck .

In step S209, the capacity of the user equipments in the first user equipment set is obtained based on the first schedule.

As mentioned above, the first schedule is performed by a giant base station. During the first schedule, the capacity of the user equipment in the first set of user equipment can be obtained by various methods found in the art.

In step S210, a use of the to-be-served is selected based on the capacities of the user devices in the first set of user devices and the adjusted capacities of the user devices in the second set of user devices. Equipment.

Next, the flow in Fig. 2 ends.

3 is a diagram of an apparatus 300 for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission, in accordance with an embodiment of the present invention. Block diagram. The apparatus 300 as illustrated in Figure 3 can be implemented in a giant base station in a cellular communication system or in any other suitable device that can be used by those skilled in the art.

The cellular communication system in the embodiment illustrated in FIG. 3 includes a giant base station and a micro base station, wherein the giant base station performs a first schedule to serve a first user equipment set, and the micro base station performs a first The second schedule is to serve a second set of user devices.

In an embodiment in accordance with the present invention, apparatus 300 can include: an adjustment information determining component 310 configured to adjust information based on the first schedule and the second schedule determination; and configured to adjust the adjustment Information is sent to the micro base station to adjust the transmitting component 320 of the data to be transmitted to one of the user devices in the second set of user devices.

In an embodiment in accordance with the present invention, the adjustment information determining component 310 can include: configured to obtain one of the user devices in the first set of user devices based on the result of one of the first schedules a first channel matrix and a component of a first precoding matrix; configured to obtain a second channel matrix for one of the user devices in the second set of user devices based on one of the results of the second schedule a component of a second precoding matrix; and means configured to determine the adjustment information based on the first precoding matrix, the first channel matrix, the second precoding matrix, and the second channel matrix.

In accordance with an embodiment of the present invention, the configuration included by the adjustment information decision component 310 is configured to be based on the first precoding matrix, the first channel matrix, the second precoding matrix, and the second channel matrix. Determining the component of the adjustment information can include: configuring to select a pair from the first precoding matrix a component of a pre-coding matrix of one of the second pre-coding matrices; configured to select a component corresponding to one of the sub-channel matrices of the second channel matrix from the first channel matrix; and configured to The second precoding matrix, the second channel matrix, the sub precoding matrix, and the subchannel matrix calculate a phase adjustment matrix as a component of the adjustment information.

In an embodiment in accordance with the invention, apparatus 300 can further include: a receiving member (not shown) configured to receive a result of one of the second schedules from the micro base station. In an embodiment of the present invention, the result of the second schedule may, for example, comprise: a channel of a channel between the micro base station and the user equipment in the second set of user equipment Status information. In another embodiment of the present invention, the result of the second schedule may further include at least one of: a serial number of the user equipment in the second user equipment set; a precoding layer number of the user equipment in the user equipment set; a resource allocated to the user equipment in the second user equipment set; and a demodulation variable reference signal.

In an embodiment of the present invention, the apparatus 300 may further include: configured to adjust the information, the capacity of the user equipment in the first user equipment set, and the second user equipment set The capacity of the user device selects a selection component (not shown) of the user device to be servoed from the first user device set and the second user device set.

In an embodiment of the present invention, the selecting means may include: configured to obtain the second user based on the adjustment information and the capacities of the user devices in the second set of user devices The device in the collection And means for adjusting the capacity of the user equipment; configured to obtain the components of the capacity of the user equipment in the first set of user equipment based on the first schedule; and configured to The capacity of the user devices in the first set of user devices and the adjusted capacities of the user devices in the second set of user devices select a component of the user device to be served.

In an embodiment in accordance with the invention, transmitting component 320 can be further configured to transmit at least one of: to a micro base station: a selected modulation and coding scheme; and to be from the micro base The data transmitted by the station to the user equipment in the second user equipment set.

4 is a flow chart of a method for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission, in accordance with an embodiment of the present invention. The embodiment illustrated in Figure 4 can be performed by a micro base station in a cellular communication system or by any other suitable device available to those skilled in the art.

The cellular communication system in the embodiment illustrated in FIG. 4 includes a giant base station and a micro base station, wherein the giant base station performs a first schedule to serve a first user equipment set, and the micro base station performs a second Scheduling to serve a second set of user devices.

In step S401, the adjustment information is received from the giant base station, wherein the adjustment information is based on the first schedule and the second schedule determination.

According to an embodiment of the present invention, the adjustment information determined in step S101 can be received, and the adjustment information can be determined by the jumbo base station or by any other suitable device.

According to an embodiment of the present invention, the adjustment information received in step S401 may be the phase adjustment matrix calculated in steps S201-S206.

In step S402, the data to be transmitted to one of the user equipments in the second user equipment set is adjusted based on the adjustment information.

According to an embodiment of the present invention, step S402 may be implemented by: obtaining a second channel matrix for one of the user equipments in the second user equipment set based on one of the second schedule results And a second precoding matrix; and adjusting, according to the adjustment information, the second precoding matrix and the second channel matrix, the user equipment to be transmitted from the micro base station to the second user equipment set data.

According to an embodiment of the present invention, one of the results of the second schedule may also be sent to the giant base station before step S401. The result of the second schedule, for example, can include: CSI of the channel(s) between the micro base station and the (the) user equipment in the second set of user equipment.

According to another embodiment of the present invention, the result of the second schedule may comprise one or more of: 微型 a micro base station and the (the) user in the second set of user equipment CSI of the channel(s) between the devices; 序号 the number of the (the) user devices in the second set of user devices; 该 the (the) users in the second set of user devices a precoding layer number of the device; 资源 a resource allocated to the (the) user device in the second user device set; 解调 Demodulation variable reference signal (DMRS).

According to an embodiment of the present invention, in addition to the adjustment information received in step S401, one or more of the following may be received from the mega base station: ̇ a selected modulation and coding scheme; and Information transmitted from the micro base station to the (these) user equipment in the second set of user equipment.

Next, the flow in Fig. 4 ends.

5 is a flow chart of a method for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission, in accordance with another embodiment of the present invention. The embodiment illustrated in Figure 5 can be performed by a micro base station in a cellular communication system or by any other suitable device available to those skilled in the art.

Similar to the embodiment illustrated in FIG. 4, the cellular communication system in the embodiment illustrated in FIG. 5 also includes performing a first schedule to servo a macro base station of a first user equipment set, and executing one The second schedule is to serve as a micro base station for one of the second set of user devices.

In step S501, one of the results of the second schedule is sent to the giant base station.

Please note that step S501 is optional.

In an embodiment in accordance with the invention, the second schedule is performed by a micro base station. By performing the second schedule, the micro base station (for example) can know the respective capacities of its own user equipment (e.g., UE6, UE7, UE8, UE9, and UE10) and select users from such user equipments. Equipment Groups (eg, UE6 and UE7 are selected) for servoing. This second schedule can be implemented in a variety of ways known in the art. A group of user devices that are served by the micro base station by performing the second schedule is referred to as a second set of user devices. In this example, the second set of user devices includes two user devices, namely UE6 and UE7.

One of the results of the second schedule can be obtained based on the second schedule (eg, the CSI of the channel between the micro base station and the second set of user equipment (ie, the user equipment of the micro base station servo)) . In accordance with an embodiment of the present invention, transmitting one of the results of the second schedule to the jumbo base station includes transmitting the micro base station to the (the) user equipment in the second set of user equipment CSI of the channel(s).

In another embodiment of the present invention, the result of the second schedule including at least one of the following may also be sent to the jumbo base station: the user equipment in the second set of user equipment a serial number, a precoding layer number of the user equipment in the second user equipment set, a resource allocated to the user equipment in the second user equipment set, and a demodulation variable reference signal.

In step S502, adjustment information is received from the giant base station.

Similar to step S401, the adjustment information may be determined based on the first schedule and the second schedule.

According to an embodiment of the present invention, the adjustment information determined in step S101 can be received, and the adjustment information can be determined by the jumbo base station or by any other suitable device.

According to an embodiment of the present invention, the adjustment information received in step S401 It may be the phase adjustment matrix calculated in steps S201-S206.

In step S503, a second channel matrix and a second precoding matrix for one of the user equipments in the second user equipment set are obtained based on one of the results of the second schedule.

This step is similar to step S203. In this embodiment, the second schedule is performed by a micro base station. By performing the second schedule, the micro base station can know, for example, the respective capacities of its user devices and select a group of user devices from which the user devices are to be servoed. This second schedule can be implemented by various methods known in the art. A group of user devices that are served by the micro base station by performing the second schedule is referred to as a second set of user devices.

With the second schedule, the channel matrix and precoding matrix of the channel between the micro base station and its servo user equipment can be obtained by various prior techniques or methods. For example, the micro base station can obtain the CSI of the channel, and then obtain a channel matrix based on the CSI, and a precoding matrix can be obtained by a conventional algorithm in the art. Such conventional algorithms may be, for example, SVD decomposition algorithms, zero-forcing (ZF) algorithms, block diagonal (BD) algorithms, and the like.

In order to distinguish from the channel matrix and the precoding matrix obtained by the mega base station, the channel matrix and the precoding matrix for the user equipment in the second user equipment set obtained based on the result of the second scheduling are called a second channel matrix and a second precoding matrix.

In step S504, based on the adjustment information, the second precoding matrix and the second channel matrix, the adjustment is to be transmitted from the micro base station to the second user. Information about such user devices in the collection of devices.

In this embodiment, the same situation as the embodiment explained by Fig. 2 is assumed. Suppose there are 24 antennas in a giant base station with 3 giant cells, and each giant cell has 8 antennas. It is also assumed that the micro base station has 8 antennas. In addition, it is assumed that the user equipment has two antennas. The micro base station assumes that P cells are served after performing the second scheduling, and the channel matrix (ie, the second channel matrix) between the P UEs and the micro base station is represented as And the second precoding matrix is represented as Where p denotes the pth UE of the P UEs and L _p denotes the layer number of the pth UE.

In addition, it is assumed that the data of the user equipment to be transmitted from the micro base station to the second user equipment set is S, and the adjustment information received in step S502 is assumed to be M _Adjust , which may be based on the adjustment information, the second pre- The coding matrix and the second channel matrix are adjusted by the equation (6):

In step S505, the adjusted data is transmitted to the user devices.

Next, the flow in Fig. 5 ends.

6 is a block diagram of an apparatus 600 for scheduling user equipment in a cellular communication system based on coordinated multi-point joint transmission, in accordance with an embodiment of the present invention. The apparatus 600 as illustrated in Figure 6 can be implemented in a micro base station in a cellular communication system or in any other suitable device that can be used by those skilled in the art.

The cellular communication system in the embodiment illustrated in FIG. 6 includes a first base station for servicing a giant base station of a first user equipment set, And executing a second schedule to serve a micro base station of a second set of user equipment.

In an embodiment in accordance with the invention, apparatus 600 can include receiving component 610 configured to receive adjustment information from the jumbo base station, wherein the adjustment information is based on the first schedule and the second schedule Determining; and adjusting means 620 configured to adjust data to be transmitted to one of the user devices of the second set of user devices based on the adjustment information.

In an embodiment in accordance with the invention, the adjustment component 620 can include: configured to obtain one of the user devices in the second set of user devices based on one of the results of the second schedule a component of the channel matrix and a second precoding matrix; and configured to adjust to be transmitted from the micro base station to the second set of user equipment based on the adjustment information, the second precoding matrix, and the second channel matrix The component of the data of such user equipment.

In an embodiment in accordance with the invention, apparatus 600 may further include: a transmitting component configured to transmit a result of the second schedule to the jumbo base station prior to receiving the adjustment information from the jumbo base station (not shown). In an embodiment of the present invention, the result of the second schedule may include: channel state information of a channel between the micro base station and the user equipment in the second user equipment set. In an embodiment of the present invention, the result of the second schedule may further include at least one of: a serial number of the user equipment in the second user equipment set; a precoding layer number of one of the user equipments in the set of user equipment; the one assigned to the second user equipment set The resources of the user equipment; and a demodulation variable reference signal.

In an embodiment in accordance with the invention, receiving component 610 can be further configured to receive at least one of: a selected modulation and coding scheme from a jumbo base station; and to be from the micro base station Information transmitted to the user device in the second set of user devices.

By using the method and apparatus for scheduling user equipment in a cellular communication system based on coordinated multi-point joint transmission according to the present invention, the FDD system and the TDD system adapted to the 11th edition can be implemented and satisfied. User equipment scheduling with strict requirements for CoMP technology between points.

The method disclosed in the embodiments of the present invention can be implemented in a combination of software, hardware, or a combination of a soft body and a hardware. The hardware portion can be implemented by dedicated logic; the software portion can be stored in memory and executed by a suitable instruction execution system (eg, a microprocessor, a personal computer (PC), or a large computer). In a preferred embodiment, the invention is embodied as a software including, but not limited to, a firmware, resident software, microcode, and the like.

Furthermore, embodiments of the present invention can be implemented as a computer program product that can be accessed from a computer or accessed by a computer readable medium, which is provided by a computer or any instruction execution system or with a computer or any instruction Execute the code used by the system in combination. For the purposes of this description, a computer-usable or computer-readable medium can be any program that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Tangible components.

The media can be electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems (devices or devices) or media. Examples of computer readable media can include Each of them: semiconductor or solid-state storage devices, magnetic tapes, portable computer discs, random access memory (RAM), read-only memory (ROM), hard drives, and optical discs. Examples of current optical disks include compact disc-read only memory (CD-ROM), compact disc-reading (CR-R/M), and DVD.

A system adapted to store or execute a code in accordance with an embodiment of the present invention can include at least one processor coupled directly to or coupled to a storage element via a system bus. The storage element can include a local memory that can be used during actual execution of the code, a large amount of memory, and a temporary storage of at least a portion of the code to reduce the number of times the code is retrieved from the mass memory during execution. Take the memory.

Input/output or I/O devices (including but not limited to keyboards, displays, indicator devices, etc.) can be coupled to the system either directly or via an intermediate I/O controller.

The network adapter can also be coupled to the system such that the system can be coupled to other systems, remote printers, or storage devices via an intermediate private or public network. Data modems, cable modems, and Ethernet cards are just examples of currently available network adapters.

It should be noted that in order to facilitate an understanding of the embodiments of the present invention, some of the more specific technical details which are known to those skilled in the art and which are necessary to practice the embodiments of the present invention are omitted in the above description.

The description of the present invention is intended to be illustrative and not a Many modifications and variations are available to those of ordinary skill in the art.

The embodiment was chosen and described in order to best explain the principles of the application of the invention, and All modifications and variations are within the scope of the invention as defined by the scope of the claims.

300‧‧‧Devices for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission

310‧‧‧After the adjustment information determining means configured to adjust the adjustment information based on the first schedule and the second schedule

320‧‧‧ transmitting means for transmitting the adjustment information to the micro base station for adjusting data to be transmitted to one of the user equipment sets of the second user equipment set

600‧‧‧Device for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission

610‧‧‧Receiving components configured to receive adjustment information from a giant base station

620‧‧‧ an adjustment component configured to adjust data to be transmitted to one of the user devices of the second set of user devices based on the adjustment information

1 is a flow chart of a method for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission, in accordance with an embodiment of the present invention; FIG. 2 is a diagram of another embodiment of the present invention. Flowchart of a method for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission; FIG. 3 is a honeycomb type for coordinated coordinated multipoint joint transmission according to an embodiment of the present invention; Block diagram of a device for scheduling user equipment in a communication system; FIG. 4 is a flow chart of a method for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission according to an embodiment of the present invention Figure 5 is a flow chart of a method for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission in accordance with another embodiment of the present invention; and Figure 6 is a diagram in accordance with the present invention. A block diagram of an apparatus for scheduling user equipment in a cellular communication system based on coordinated multipoint joint transmission of an embodiment.

Claims (20)

A method for scheduling a user device in a cellular communication system based on coordinated multipoint joint transmission, wherein the cellular communication system includes executing a first schedule to serve a set of first user equipment a macro base station and performing a second schedule to serve a micro base station of a second set of user equipment, the method comprising: obtaining, based on a result of one of the first schedules, a set of the first user equipment a first channel matrix of a user equipment and a first precoding matrix; obtaining, according to one of the second schedules, a second channel matrix for one of the user equipments in the second user equipment set and a second precoding matrix; selecting, from the first precoding matrix, a sub precoding matrix corresponding to the second precoding matrix; selecting, from the first channel matrix, a subchannel matrix corresponding to the second channel matrix; Calculating a phase adjustment matrix as the adjustment information based on the second precoding matrix, the second channel matrix, the sub precoding matrix, and the subchannel matrix; and sending the adjustment information to Micro base station to adjust the data to be transmitted to the second set of one user device the user equipment. The method of claim 1, further comprising: receiving a result of the second schedule from the micro base station, wherein the result of the second schedule comprises: the micro base station and the second user set Channel status information of a channel between the user devices in the collection. The method of claim 2, wherein the result of the second schedule further comprises at least one of: a serial number of the user equipment in the second set of user equipment; the second user equipment a precoding layer number of the user equipment in the collection; a resource allocated to the user equipment in the second user equipment set; and a demodulation variable reference signal. The method of claim 1, further comprising: based on the adjustment information, a capacity of the user equipment in the first user equipment set, and a capacity of the user equipment in the second user equipment set from the first use The device set and the second set of user devices select a user device to be served. The method of claim 4, wherein the adjustment information, the capacity of the user equipment in the first user equipment set, and the capacity of the user equipment in the second user equipment set are from the first user equipment set And selecting, by the second user equipment set, a user equipment to be served, comprising: obtaining the second user equipment set based on the adjustment information and the capacity of the user equipments in the second user equipment set The adjusted capacity of the user devices; the capacity of the user devices in the first user device set based on the first schedule; and based on the first user device set The capacity of the user equipment and the user equipment of the second user equipment set The adjusted capacity selects a user device to be servoed. The method of claim 1, further comprising: transmitting at least one of: to the micro base station: a selected modulation and coding scheme; and transmitting to the second user from the micro base station Information about the user device in the device collection. A method for scheduling a user device in a cellular communication system based on coordinated multipoint joint transmission, wherein the cellular communication system includes executing a first schedule to serve a set of first user equipment The macro base station and performing a second schedule to serve a micro base station of a second set of user equipment, the method comprising: receiving adjustment information from the giant base station, wherein the adjustment information is based on a precoding matrix, a channel matrix, a sub-precoding matrix, and a sub-channel matrix determination, the pre-coding matrix and the channel matrix being obtained based on one of the second schedules for one of the user devices in the second user equipment set And the sub-precoding matrix and the sub-channel matrix are selected based on a result of one of the first schedules; and the data to be transmitted to one of the user equipments in the second user equipment set is adjusted based on the adjustment information. The method of claim 7, before receiving the adjustment information from the mega base station, the method further comprising: transmitting a result of the second schedule to the mega base station, wherein the result of the second schedule includes: Channel status information of a channel between the micro base station and the user equipment in the second user equipment set. The method of claim 8, wherein the result of the second schedule further comprises at least one of: a serial number of the user equipment in the second user equipment set; the second user equipment a precoding layer number of the user equipment in the collection; a resource allocated to the user equipment in the second user equipment set; and a demodulation variable reference signal. The method of claim 7, further comprising: receiving, from the jumbo base station, at least one of: a selected modulation and coding scheme; and transmitting from the micro base station to the second user equipment Information about the user device in the collection. An apparatus for scheduling a user equipment in a cellular communication system based on coordinated multi-point joint transmission, wherein the cellular communication system includes performing a first schedule to servo a first user equipment set a giant base station and performing a second schedule to serve a micro base station of a second set of user equipment, the apparatus comprising: configured to obtain a first user based on a result of one of the first schedules a first channel matrix of one of the user devices and a component of a first precoding matrix; configured to obtain one of the second set of user devices based on one of the results of the second schedule a component of a second channel matrix and a second precoding matrix of the user equipment; configured to select a component corresponding to one of the sub precoding matrices of the second precoding matrix from the first precoding matrix; Selecting, from the first channel matrix, a component corresponding to one of the subchannel matrices of the second channel matrix; Configuring to calculate a phase adjustment matrix as a component of the adjustment information based on the second precoding matrix, the second channel matrix, the subprecoding matrix, and the subchannel matrix; and configured to adjust the information Sending to the micro base station to adjust a transmitting component of the data to be transmitted to one of the second user equipment sets. The apparatus of claim 11, further comprising: a receiving component configured to receive a result of the second schedule from the micro base station, wherein the result of the second schedule comprises: the micro base station and the Channel status information of a channel between the user equipments in the second user equipment set. The device of claim 12, wherein the result of the second schedule further comprises at least one of: a serial number of the user equipment in the second set of user equipment; the second user equipment a precoding layer number of the user equipment in the collection; a resource allocated to the user equipment in the second user equipment set; and a demodulation variable reference signal. The device of claim 11, further comprising: configured to adjust the information, the capacity of the user device in the first set of user devices, and the capacity of the user device in the second set of user devices The first user equipment set and the second user equipment set select a selection component of the user equipment to be servoed. The device of claim 14, wherein the selecting means comprises: configured to obtain the second set of user devices based on the adjustment information and the capacities of the user devices in the second set of user devices Means for adjusting the capacity of the user equipment of the user; configured to obtain the components of the capacity of the user equipment in the first user equipment set based on the first schedule; Selecting a user device to be served based on the capacity of the user devices in the first set of user devices and the adjusted capacities of the user devices in the second set of user devices The components. The apparatus of claim 11, wherein the transmitting component is further configured to transmit at least one of: to the micro base station: a selected modulation and coding scheme; and to be transmitted from the micro base station to Information of the user equipment in the second user equipment set. An apparatus for scheduling a user equipment in a cellular communication system based on coordinated multi-point joint transmission, wherein the cellular communication system includes performing a first schedule to servo a first user equipment set a macro base station and a second schedule for servicing a micro base station of a second set of user equipment, the apparatus comprising: a receiving component configured to receive adjustment information from the giant base station, wherein the adjustment information system Determining, based on a precoding matrix, a channel matrix, a sub precoding matrix, and a subchannel matrix, the precoding matrix and the channel matrix are obtained for the second user equipment based on one of the results of the second scheduling a user equipment in the set, and the sub-precoding matrix and the sub-channel matrix are selected based on a result of one of the first schedules; and configured to adjust to be transmitted to the second user based on the adjustment information An adjustment component of the data of one of the device devices in the device collection. The apparatus of claim 17, further comprising: a transmitting component configured to transmit a result of the second schedule to the transmitting unit of the jumbo base station prior to receiving the adjustment information from the jumbo base station, wherein the second row The result of the process includes: channel state information of a channel between the micro base station and the user equipment in the second user equipment set. The device of claim 18, wherein the result of the second schedule further comprises at least one of: a serial number of the user equipment in the second set of user equipment; the second user equipment a precoding layer number of the user equipment in the collection; a resource allocated to the user equipment in the second user equipment set; and a demodulation variable reference signal. The apparatus of claim 17, wherein the receiving component is further configured to: receive at least one of: a selected modulation and coding scheme from the jumbo base station; and to transmit from the micro base station to Information of the user equipment in the second user equipment set.