WO2016023235A1

WO2016023235A1 - Method, apparatus, and system for scheduling user device

Info

Publication number: WO2016023235A1
Application number: PCT/CN2014/084551
Authority: WO
Inventors: 左勇; 熊芝兰; 杨红卫
Original assignee: 上海贝尔股份有限公司
Priority date: 2014-08-15
Filing date: 2014-08-15
Publication date: 2016-02-18
Also published as: CN106489279B; CN106489279A

Abstract

Provided in the present invention is a method used in a first node for providing coordination-related information to a second node, said method comprising the following steps: a. acquiring the spectral efficiency of every user device amongst at least one user device on every frequency re-use region available to said user device; b. on the basis of the spectral efficiency of the at least one user device, determining the coordination-related information for use by the second node, said coordination-related information may be used by the second node for scheduling the at least one user device; and c. providing the coordination-related information to the second node. The solution of the present invention has the effect of optimising the frequency resource partitioning, user selection in different partitions, load balancing, and power regulation in an OFDM system, and results in significant cell average gain and cell edge gain.

Description

Method, device and system for scheduling user equipment

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, apparatus, and system for scheduling user equipment. Background technique

In the prior art, when cooperative multipoint transmission is performed in a downlink, a Coordinated Scheduling (CS) is usually implemented based on a Fractional Frequency Reuse (FRR), which is mainly at a transmission point (such as Base stations) cooperate to reduce inter-cell interference between coverage areas of different transmission points. Summary of the invention

It is an object of the present invention to provide a method, apparatus and system for scheduling user equipment.

According to an aspect of the present invention, a method for providing cooperation related information to a second node in a first node is provided, wherein the method comprises the following steps: a. for each user equipment in at least one user equipment, Acquiring the frequency efficiency of the user equipment on each of the frequency reuse areas available to the user equipment, wherein the at least one user equipment is attached to the second node; b. according to the spectrum efficiency of the at least one user equipment, Determining collaboration related information for the second node, the collaboration related information being usable by the second node to schedule the at least one user equipment; c providing the collaboration related information to the second node. According to another aspect of the present invention, a method for scheduling a user equipment attached to the second node in a second node is further provided, wherein the method includes Next steps:

A. transmitting downlink measurement information of the at least one user equipment attached to the second node to the first node, or each user equipment of the at least one user equipment is on each frequency reuse area available to the user equipment Spectral efficiency;

B. receiving collaboration related information fed back by the first node;

C. scheduling the at least one user equipment according to the collaboration related information. According to another aspect of the present invention, there is provided a first apparatus for providing cooperation related information to a second node in a first node, wherein the first apparatus comprises the following:

a first obtaining means, configured to obtain, for each user equipment of the at least one user equipment, a spectral efficiency of the user equipment on each frequency reuse area available to the user equipment, where the at least one user equipment is attached to the On the second node;

a first determining means, configured to determine, according to a spectrum efficiency of the at least one user equipment, collaboration related information for the second node, where the cooperation related information can be used by the second node to schedule the at least one user Equipment

Providing means for providing the collaboration related information to the second node.

According to another aspect of the present invention, there is provided a second apparatus for scheduling a user equipment attached to the second node in a second node, wherein the second apparatus comprises the following means:

a sending device, configured to send downlink measurement information of the at least one user equipment attached to the second node to the first node, or each user equipment in the at least one user equipment is multiplexed at each frequency available to the user equipment Spectral efficiency over the area;

The second receiving device is configured to receive the collaboration related information that is fed back by the first node, and the scheduling device is configured to schedule the at least one user device according to the collaboration related information.

Compared with the prior art, the present invention has the following advantages: 1) Supporting, in the first node, determining the cooperation for the second node based on the spectral efficiency of each user equipment in each of the available spectrum multiplexing regions. Scheduling collaboration related information, so that the second node can perform scheduling of the user equipment according to the collaboration related information; 2) can not change the basis of the existing protocol Coordinate information is transmitted between the first node and the second node based on the existing X2 signaling; 3) scheduling based on the cooperation related information, which can optimize the frequency resource division in the OFDM system and the users in different partitions The effects of selection, load balancing, and power conditioning, etc., can result in significant cell average gain and cell edge gain. DRAWINGS

Other features, objects, and advantages of the present invention will become more apparent from the Detailed Description of Description

FIG. 1 is a schematic flowchart of a method for scheduling a user equipment according to an embodiment of the present invention;

2 is a schematic flowchart of a method for scheduling a user equipment according to another embodiment of the present invention;

3 is a schematic structural diagram of a system for scheduling a user equipment according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a system for scheduling user equipment according to another embodiment of the present invention.

The same or similar reference numerals in the drawings denote the same or similar components. detailed description

The invention is further described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic flowchart of a method for scheduling a user equipment according to an embodiment of the present invention.

The method in this embodiment is implemented by using the first node and the second node, where the first node and the second node belong to the same CoMP (Coordinated Multiple Points) cluster. The first node is preferably a node that initiates a coordinated transmission; in a centralized CoMP network architecture, the first node includes, but is not limited to, a central node (CN, Central Node) of the centralized CoMP network architecture; In a distributed CoMP network architecture, the first node may be any node in the distributed network. The second node is preferably a section that accepts cooperative transmission initiated by the first node Point, and the second node may be any node other than the first node in the current network structure.

Preferably, the network where the first node and the second node are located is an LTE-A (LTE-Advanced) network or a subsequent upgrade network; more preferably, in a centralized CoMP network architecture, the The two nodes are eNBs (evolved Node Bs) in the LTE-A network; in the distributed CoMP network architecture, the first node and the second node are all eNBs in the LTE-A network (evolved Node B) , evolved base station).

It should be noted that the nodes and the network are only examples, and other existing or future possible nodes and networks, as applicable to the present invention, are also included in the scope of the present invention and are incorporated herein by reference. .

The method according to this embodiment includes step S1, step S2, step S3, step S4, step S5, and step S6.

In step S1, the second node sends downlink measurement information of the at least one user equipment attached to the second node to the first node, or sends each user equipment in the at least one user equipment attached to the second node. Spectrum Efficiency (SE) on each Frequency Reuse (FR) region available. When the second node needs to send the spectrum efficiency, for each user equipment in the at least one user equipment, the second node calculates, according to the downlink measurement information from the user equipment, each frequency that the user equipment is available to. Spectral efficiency over the multiplexed area. In this implementation manner, the first node in the embodiment shown in FIG. 2 determines, according to the downlink measurement information of the user equipment, that the spectrum efficiency of the user equipment on each frequency reuse region that is available to the user equipment is the same or similar. It will not be detailed here.

Preferably, the at least one user equipment is an active user equipment attached to the user equipment of the second node.

The downlink measurement information includes any information that the user equipment measures for the downlink and can be used to calculate the spectrum efficiency. Preferably, the downlink measurement information includes but is not limited to:

1) Reference signal received power measured by the user equipment ( Reference Signal Receiving Power, RSRP).

The user equipment may report its measured RSRP to the second node periodically or non-periodically. Preferably, each user equipment includes at most 9 signal strength information (SPI) based on the RSRP signaling of the X2 interface, where the 9 signal strength information are respectively from a serving cell and 8 mains of the user equipment. A neighboring cell.

2) Channel State Information (CSI) measured by the user equipment on the system bandwidth, where the downlink channel state information includes but not limited to - CQI (Channel Quality Indicator), PMI (Precoding) Matrix Indicator, precoding matrix indication), RI ( Rank Indication, rank indication), etc.

3) Downstream channel state information measured by the user equipment on each subband.

For example, if the system bandwidth includes 9 subbands, the downlink measurement information includes downlink channel state information measured by the user equipment on each subband of the 9 subbands.

The spectrum multiplexing area is an area that can be used for spectrum multiplexing in a system bandwidth; preferably, one system bandwidth can correspond to multiple frequency multiplexing areas; more preferably, frequency multiplexing available on one system bandwidth The area is two.

The frequency multiplexing region may correspond to multiple subbands included in the system bandwidth, and the subbands corresponding to each frequency multiplexing region are different; wherein the number of subbands in each frequency region may be based on the total system bandwidth. The number of subbands, as well as the ratio information between the predefined frequency reuse regions, is determined. For example, the bandwidth of the LTE system is 10M, and the bandwidth corresponds to 9 subbands. It is assumed that the CoMP cluster adopts a centralized network architecture. The centralized network structure has three second nodes. The available spectrum multiplexing area of the system is FR1 and FR3; where FR1 is a frequency reuse region corresponding to when the three second nodes participate in cooperation, and FR3 is a spectrum multiplexing region corresponding to when the three second nodes do not participate in cooperation, and the first node (that is, the concentration) The ratio information between the predefined frequency reuse regions FR1 and FR3 in the central node of the network structure is 2:1, then it can be determined that FR1 corresponds to 6 subbands of the 9 subbands, and FR3 corresponds to the 9 sub-bands The other 3 sub-bands in the band.

It should be noted that although based on the downlink measurement information in the current 3GPP standard, The frequency efficiency is determined in the second node, however, the dedicated signaling for transmitting the spectrum efficiency between the first node and the second node (such as between the base stations) has not been defined in the current 3GPP standard, That is, it is not defined how to obtain the spectral efficiency in the first node. In this embodiment, the second node may send the spectrum efficiency to the first node in multiple manners, for example, adding the spectrum efficiency to existing signaling (such as a measurement report) to send the first node to the first node. For example, frequency efficiency can be defined; for example, new signaling can be defined for transmitting the spectral efficiency between the first node and the second node.

In step S2, for each of the at least one user equipment, the first node acquires the spectral efficiency of the user equipment on each of the frequency reuse regions available to the user equipment.

Specifically, for each user equipment of the at least one user equipment, the manner in which the first node obtains the spectrum efficiency of the user equipment on each frequency reuse area available to it includes, but is not limited to:

1) the second node sends the spectrum efficiency in step S1, then in step S2, for each user equipment in the at least one user equipment, the first node directly acquires each of the user equipments provided by the second node Spectral efficiency over frequency multiplexed regions.

2) The second node sends downlink measurement information in step S1, then in step S2, the first node receives downlink measurement information of at least one user equipment sent by the second node, and, for each user in the at least one user equipment The device, the first node determines, according to the downlink measurement information of the user equipment, the frequency efficiency of the user equipment on each frequency reuse area that is available to the user equipment. This implementation will be described in detail with reference to the embodiment shown in FIG. 2.

In step S3, the first node determines collaboration related information for the second node according to the spectral efficiency of the at least one user equipment.

Specifically, the first node performs an algorithm for cooperative scheduling according to the spectral efficiency of the at least one user equipment to determine collaboration related information for the second node.

The collaboration related information includes any information that can be used for cooperative scheduling of the second node, and the collaboration related information can be used by the second node to schedule the at least one user equipment. Preferably, the collaboration related information includes but is not limited to:

1) allocation information of the frequency reuse area;

The allocation information of the frequency multiplexing area is used to indicate the at least one user. The assignment relationship between the device and the frequency reuse region, that is, the frequency reuse region to which each user equipment is assigned. For example, the at least one user equipment includes a user equipment

UE1, UE2, and UE3, the frequency multiplexing area available to the user equipment includes FR1 and FR3, the allocation information is used to indicate that UE1 and UE2 are allocated to FR1, and UE3 is allocated to FR3.

2) Proportional information between frequency reuse regions based on the same frequency.

The same frequency is the system bandwidth used by the CoMP cluster. The ratio information is used to indicate a ratio between the number of subbands corresponding to the frequency multiplexing region. For example, the ratio information between the frequency multiplexing regions FR1 and FR3 indicates the number of subbands corresponding to FR1 and FR3. The ratio is 2:1.

3) Usage information of the low power frequency reuse area.

Preferably, the low power spectrum multiplexing area is used to indicate a low power area in a frequency multiplexing area corresponding to when all nodes do not participate in cooperation.

For example, when all the nodes do not participate in the cooperation, the corresponding frequency reuse area is the frequency division multiplexing area FR3, and the FR3 is divided into a high power area and a low power area according to the power threshold, and when the low power area is used, the first node Determining the usage of the low-power area,

It should be noted that the foregoing collaboration related information is only an example, and those skilled in the art should understand that any information that can be used for cooperative scheduling of the second node should be included in the scope of the collaboration related information according to the present invention.

It should be noted that the foregoing examples are only for better illustrating the technical solutions of the present invention, and are not intended to limit the present invention. Those skilled in the art should understand that any one is determined according to the spectral efficiency of the at least one user equipment. The implementation of the cooperation related information of the second node should be included in the scope of the present invention.

In step S4, the first node provides the collaboration related information to the second node. Specifically, the implementation manner in which the first node provides the collaboration related information to the second node includes but is not limited to:

1) The cooperation related information includes allocation information of a frequency reuse area, and the first node provides benefit indicator information including the allocation information to the second node. Specifically, the first node provides the second node with the benefit indicator including the allocation information based on the existing X2 signaling used to send the benefit metric (BM) information.

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Preferably, the bit in the benefit indicator information corresponds to the user equipment, and the value on the bit identifies the frequency reuse region of the user equipment allocated to the bit. For example, in step S2, the first node acquires the spectrum efficiency of the user equipments UE1, UE2, and UE3 on the frequency multiplex areas FR1 and FR3, respectively, where the number after the "UE" is used to indicate the ID of the user equipment ( IDentification), such as "1" in "UE1" is used to indicate that the ID of the user equipment is 1; in step S3, the first node determines the allocation information of the spectrum multiplexing areas FR1 and FR3 according to the above spectral efficiency. In step S4, the first node converts the benefit indicator information to be added to the allocation information into a binary number, and uses the IDs of the user equipments to determine a bit corresponding to the user equipment, such as the last bit of the binary number. The bit corresponds to the UE1, the second last bit corresponds to the UE2, and the third last bit corresponds to the UE3; and the first node sets the value on the bit corresponding to each user equipment according to the allocation information, such as when setting When the value of the bit is "0", the user equipment corresponding to the bit is allocated to FR1, and when the value of the bit is "1", the user equipment corresponding to the bit is allocated to FR3; The first node converts the binary number into a decimal number, and provides the second node with the benefit indicator information including the allocation information based on the existing X2 signaling for transmitting the benefit indicator information.

It should be noted that one benefit indicator information may be associated with one or more CoMP settings to quantify the expected benefit in collaborative scheduling; if the first node provides benefit indicator information to the second node, the benefit indicator information may be It is always provided to the second node in conjunction with the CoMP settings. The benefit indicator information may be determined based on the downlink measurement information, and the information granularity of the downlink channel state information may be a broadband or a subband, and the information granularity of the RSRP is a wideband. Therefore, as another solution of the implementation manner, the enhanced The benefit indicator information, the optional information granularity of the enhanced benefit indicator information includes a PRB level or a broadband level to support an associated CoMP setting for providing cooperation related information to the second node in this embodiment.

2) the cooperation related information includes between frequency reuse regions based on the same frequency Proportional information, and/or usage information for low power frequency reuse regions. The first node adds the ratio information and/or the usage information to the CoMP settings and provides the CoMP settings to the second node.

The CoMP setting is used to configure CoMP transmission, and multiple formats of CoMP settings are pre-defined in the protocol adopted by the CoMP network architecture.

Specifically, the first node adds the ratio information and/or the usage information to a predefined CoMP setting format to generate a specific CoMP setting, and provides the CoMP setting to the second node; preferably, the The information granularity of the CoMP setting is a PRB (Physical Resource Block) level or a broadband level.

3) The cooperation related information includes channel state information of each user equipment on each subband, and the cooperation related information includes usage information of a low power frequency reuse area. The first node provides the usage information to the second node by transmitting enhanced RNTP signaling to the second node.

The information granularity of the enhanced RNTP signaling is extended to the frequency domain or the time domain, and may be information; preferably, the frequency or time indicated by the enhanced RNTP signaling may be through the first node and the second node. A status report is sent between the exchange of the indicated frequency or time, the use of the low power frequency reuse region.

Preferably, when the first node determines that the low power region in the frequency multiplexing region is used, the first node determines the usage information of the low power region and provides it as part of the collaboration related information or the collaboration related information. Give the second node.

Specifically, the first node may determine a low power region in the frequency division multiplexing region in a plurality of manners to make a power allocation decision. For example, the first node may obtain a power threshold according to enhanced RNTP signaling from the second node, and determine a low power region in the frequency division multiplexing region in real time according to the power threshold to make a power allocation decision; for example, The first node may determine a low power region in the frequency division multiplex region based on a predefined power threshold to make a power allocation decision.

It should be noted that in the centralized CoMP network architecture, the first node can make a power allocation decision for the node it controls, and through the CoMP setting of the load information message. Sending the decision to all second nodes in the network architecture; in the distributed CoMP network architecture, the first node may make a power allocation decision for the first node itself, and the CoMP setting of the load information message Decide to send to the adjacent second node.

It should be noted that, in the foregoing implementation manner, the first node uses the existing X2 signaling to provide cooperation related information to the second node, but those skilled in the art should understand that the first node and the second node may be used. New signaling is defined between to provide collaboration related information from the first node to the second node. For example, in the X2 interface protocol, a definition of a signaling format of the allocation information may be added, and the first node may use the signaling format to provide the allocation information to the second node.

It should be noted that the above implementation manners may be combined. For example, the first node adopts the above implementation manner 1) to provide the second node with the benefit indicator information including the allocation information, and uses the above implementation manner 2) to provide the second node with the CoMP setting to which the proportion information and the usage information are added; For another example, the first node may use the foregoing implementation manner 1) to provide the second node with the benefit indicator information including the allocation information, and adopt the foregoing implementation manner.

2) Providing the second node with the CoMP setting to which the proportion information is added, and transmitting the enhanced RNTP signaling to the second node by using the above implementation mode 3) to provide the second node with the usage information.

It should be noted that the above examples are only for better explaining the technical solutions of the present invention, and are not intended to limit the present invention. Those skilled in the art should understand that any implementation manner of providing the cooperation related information to the second node should be implemented. It is included in the scope of the invention.

In step S5, the second node receives the collaboration related information fed back by the first node. In step S6, the second node schedules the at least one user equipment according to the collaboration related information.

Specifically, the implementation manner of scheduling, by the second node, the at least one user equipment according to the collaboration related information includes but is not limited to:

1) In step S5, the second node receives the benefit indicator information including the allocation information; then in step S6, the second node performs the following steps: the second node converts the benefit indicator information into binary information; Binary information, obtaining allocation information of the frequency reuse region; the second node attaching to the second node according to the allocation information At least one user equipment performs scheduling.

For example, the second node converts the received benefit indicator information into binary information, and according to the converted binary information, determines that the allocation information is used to indicate that the user equipment UE1 and UE2 are allocated to the FR1, and the user equipment UE3 is allocated to the FR3. The second node performs cooperative scheduling on UE1, UE2, and UE3 according to the allocation information.

2) In step S5, the second node receives the CoMP setting from the first node; then in step S6, the second node parses the CoMP setting according to the format definition of the CoMP setting, and obtains the frequency reuse region of the same frequency. Proportional information between, and/or, usage information for low power frequency reuse regions.

3) In step S5, the second node receives the enhanced RNTP signaling from the first node; then in step S6, the second node parses the enhanced RNTP signaling to obtain usage information of the frequency reuse region.

It should be noted that when new signaling is defined between the first node and the second node to provide cooperation related information from the first node to the second node, the second node directly according to the format of the new signaling. , to resolve the collaboration-related information.

It should be noted that the above implementation manners may be combined. For example, the second node obtains the allocation information by using the foregoing implementation manner 1), and obtains the proportional information and the usage information by using the foregoing implementation manner 2), and then, the second node, according to the allocation information, the proportional information, and the usage information, Performing cooperative scheduling on the at least one user equipment; for example, the second node obtains the allocation information by using the foregoing implementation manner 1), and obtains the proportion information by using the foregoing implementation manner 2), and obtains the usage situation by using the foregoing implementation manner 3) And the second node performs cooperative scheduling on the at least one user equipment according to the allocation information, the proportion information, and the usage information.

It should be noted that the above examples are only for better explaining the technical solutions of the present invention, and are not limited to the present invention. Those skilled in the art should understand that any at least one user equipment is scheduled according to the cooperation related information. The implementation of each should be included in the scope of the present invention.

In the prior art, cooperative scheduling is usually implemented based on FRR. Although this scheme can improve the throughput of the edge cell, the solution will reduce the average throughput of the system. and, The FRR-based scheme brings some problems, such as the inability to divide radio resources well based on multiplexing of different frequencies, and the inability to balance the load between neighboring cells.

According to the solution of the embodiment, the cooperation related information for the cooperative scheduling of the second node can be determined in the first node based on the spectral efficiency of each user equipment in each of the spectrum multiplexing regions available to the user equipment, Enabling the second node to perform scheduling of the user equipment according to the collaboration related information; and, the scheme may transmit the collaboration between the first node and the second node based on the existing X2 signaling without changing the existing protocol. Relevant information; and the scheduling based on cooperation related information in the scheme can optimize the frequency resource division in the OFDM system, user selection in different partitions, load balancing, and power adjustment.

In addition, the scheme of this implementation can bring significant gain to the system by evaluation in a standard 3GPP LTE system level simulation tool, for example, a cell average gain of up to 19.9% can be achieved, and a cell edge gain of more than 55.5%. It should be noted that the gain brought by this scheme is related to the specific TX (output) number and the detailed design of CQI feedback, rank adaptation, OLC and HARQ. In addition, it should be noted that the maximum number of available user equipment indicated in the benefit indicator information may affect the performance of the cooperative scheduling implemented in this embodiment.

FIG. 2 is a schematic flowchart of a method for scheduling a user equipment according to another embodiment of the present invention. The method in this embodiment is mainly implemented by using the first node and the second node; wherein any descriptions made by referring to the first node and the second node in the embodiment shown in FIG. 1 are cited by way of reference. It is included in this embodiment.

The method according to this embodiment includes a step S1, a step S2, a step S3, a step S4, a step S5, and a step S6. The step S2 further includes a step S21 and a step S22. The steps S1, S2, S3, S4, S5, and S6 are described in detail in the embodiment shown in FIG.

In step S1, the second node sends downlink measurement information of at least one user equipment attached to the second node to the first node.

Specifically, the second node receives the at least one user equipment attached to the second node. Downlink measurement information of each user equipment, and sending downlink measurement information of each user equipment to the first node.

In step S21, the first node receives downlink measurement information of the at least one user equipment from the second node.

It should be noted that the second node may report downlink measurement information to the first node periodically or non-periodically, for example, the second node sends the first node to the first node in a period of 120 亳, 240 亳, 480 ms, or 640 亳 seconds. Reporting the downlink measurement information; for example, the second node reports the downlink measurement information to the first node according to the request of the first node.

In step S22, for each user equipment in the at least one user equipment, the first node determines, according to the downlink measurement information of the user equipment, the frequency efficiency of the user equipment on each frequency reuse region that is available to the user equipment. .

Specifically, for each user equipment of the at least one user equipment, the first node determines, according to the downlink measurement information of the user equipment, the user equipment

1) The downlink measurement information of the user equipment includes the reference signal received power measured by the user equipment, and the first node determines the spectral efficiency of the user equipment on each of the frequency reuse regions available to the user equipment based on the reference signal received power.

Preferably, for each of the available frequency reuse regions, the first node determines an average SINR (Signal to Interference plus Noise Ratio) of the user equipment on the frequency reuse region based on the reference signal received power. The noise ratio is determined according to the average SINR to determine the frequency efficiency of the user equipment on the frequency reuse region.

As an example, the frequency multiplexing area available to the user equipment includes FR1 and FR3, and the reference signal received power measured by the user equipment UE1 includes 9 signal strength information, respectively: Pi, Ρ ₂ , ..., Ρ ₉ , where For signal strength information of the serving cell from UE1, Ρ ₂ , ..., P ₉ are signal strength information of 8 primary neighboring cells from UE1, and the identifiers of the eight primary neighboring cells are j, j= 2, ..., 9. Then the first node calculates the average SINR of UE1 on FR1 based on the following formula:

SINR _pm = ^ ^ Wherein, the SINR is the average SINR of the UE1 on the FR1; the SINR is the average SINR of the UE1 on the FR3; ., _/ = 2, ..., 9 is the signal strength information from the primary neighboring cell j, where, when UE1 When on FR1, the eight primary neighboring cells are all interfering cells of the serving cell of UE1; it is white noise power.

And, the first node calculates the average SINR of UE1 on FR3 based on the following formula:

Wherein, the sum is the signal strength information from the primary neighboring cells 4 and 7; wherein, when the UE1 is on the FR3, the interfering cell of the serving cell of the UE1 includes the primary neighboring cell 4 and the primary neighboring cell 7. Next, the first node calculates the spectral efficiency of UE1 on FR1 and the spectral efficiency of UE1 on FR3 based on the following formula:

SE _i = log ₂ (l + curtain)

SE ₃ = log ₂ (l + 57U

Among them, 8 £ is the frequency efficiency of UE1 on FR1; 8£ _3⁄43 is the frequency efficiency of UE1 on FR3.

2) The downlink measurement information of the user equipment includes downlink channel state information measured by the user equipment on the system bandwidth, or downlink channel state information measured by the user equipment on each subband, and the first node is based on the downlink channel state information. The frequency efficiency of the user equipment on each of the frequency reuse regions available to it is determined.

Preferably, for each of the available frequency reuse regions, the first node determines an average SINR of the user equipment on the frequency reuse region based on the downlink channel state information, and determines, according to the average SINR, that the user equipment is Frequency efficiency on the frequency reuse region.

As an example, the frequency multiplexing area available to the user equipment includes FR1 and FR3, and the first node according to the downlink channel state information measured by the user equipment UE1 on the system bandwidth, or the downlink channel measured by the user equipment on each subband. State information, to determine the average CQI of UE1 on FR1 and FR3, respectively, and determine the average SINR of UE1 on FR1 according to the average CQI of UE1 on FR1, that is, determine UE1 on FR3 according to the average CQI of UE1 on FR3. The average SINR, ie, the first node calculates the frequency efficiency of UE1 on FR1 and the spectral efficiency of UE1 on FR3 based on the following formula: SE _ffil = log ₂ (l + R _FR1 )

SE _m , = \og ₂ (l + SINR _Fm )

It should be noted that the above examples are only for better explaining the technical solutions of the present invention, and are not intended to limit the present invention. Those skilled in the art should understand that any user equipment in the at least one user equipment is The downlink measurement information of the user equipment, and the manner of determining the spectrum efficiency of the user equipment on each of the frequency reuse regions available to the user equipment are all included in the scope of the present invention.

According to the solution of the embodiment, the first node may determine, according to the downlink measurement information that it receives, the spectral efficiency of each user equipment in the at least one user equipment in each of the available spectrum multiplexing regions, without New signaling is defined between the first node and the second node to transmit the spectral efficiency, which can implement information transmission based on existing X2 signaling without changing the existing protocol.

FIG. 3 is a schematic structural diagram of a system for scheduling user equipment according to an embodiment of the present invention. The system according to the present embodiment includes a first node and a second node, the first node comprising a first device, the first device comprising a first obtaining device 2, a first determining device 3 and a first providing device 4; The second node comprises a second device comprising a transmitting device 1, a second receiving device 5 and a scheduling device 6.

The transmitting device 1 of the second node sends the downlink measurement information of the at least one user equipment attached to the second node to the first node, or sends the user equipment that is attached to the at least one user equipment attached to the second node. The spectral efficiency on each frequency multiplexed region. When the transmitting device 1 needs to transmit the spectrum efficiency, for each user equipment in the at least one user equipment, the sending device 1 calculates, according to the downlink measurement information from the user equipment, each frequency that the user equipment is available to. Spectral efficiency over the multiplexed area. In this implementation manner, the second determining device 22 in the embodiment shown in FIG. 4 determines, according to the downlink measurement information of the user equipment, that each user equipment is available at each of its available frequencies, and the at least one user equipment is attached. In the user equipment of the second node Active user device.

1) Reference signal received power measured by the user equipment.

The user equipment may report its measured RSRP to the second node periodically or non-periodically. Preferably, each user equipment includes up to nine signal strength information based on RSRP signaling of the X2 interface, the nine signal strength information being respectively from the serving cell of the user equipment and the eight primary neighboring cells.

2) downlink channel state information measured by the user equipment on the system bandwidth, where the downlink channel state information includes but is not limited to CQI, PMI, RI, and the like.

It should be noted that although based on the downlink measurement information in the current 3GPP standard, The frequency efficiency is determined in the second node, however, the dedicated signaling for transmitting the spectrum efficiency between the first node and the second node (such as between the base stations) has not been defined in the current 3GPP standard, That is, it is not defined how to obtain the spectral efficiency in the first node. In this embodiment, the sending apparatus 1 may send the spectrum efficiency to the first node in multiple manners, for example, adding the spectrum efficiency to an existing signaling (such as a measurement report) to send the first node to the first node. For example, frequency efficiency can be defined; for example, new signaling can be defined for transmitting the spectral efficiency between the first node and the second node.

For each of the at least one user equipment, the first acquisition means 2 of the first node acquires the spectral efficiency of the user equipment on each of the frequency reuse regions available to it.

Specifically, for each user equipment of the at least one user equipment, the manner in which the first acquiring device 2 acquires the spectrum efficiency of the user equipment on each frequency multiplexing area that is available to the user equipment includes, but is not limited to:

1) The transmitting device 1 of the second node transmits the spectrum efficiency, and for each user device in the at least one user equipment, the first acquiring device 2 of the first node directly acquires the available user equipment of the second node provided by the second node. Spectral efficiency over frequency multiplexed regions.

2) The transmitting device 1 of the second node sends the downlink measurement information, and the first acquiring device 2 of the first node receives the downlink measurement information of the at least one user equipment sent by the second node, and, for each of the at least one user equipment The user equipment, the first obtaining device 2 determines, according to the downlink measurement information of the user equipment, the spectrum efficiency of the user equipment on each frequency reuse region that is available to the user equipment. This implementation will be described in detail with reference to the embodiment shown in FIG.

The first determining means 3 determines the cooperation related information for the second node based on the spectral efficiency of the at least one user equipment.

Specifically, the first determining means 3 performs an algorithm for cooperative scheduling according to the spectral efficiency of the at least one user equipment to determine cooperation related information for the second node.

1) allocation information of the frequency reuse area; The allocation information of the frequency multiplexing area is used to indicate an allocation relationship between the at least one user equipment and the frequency multiplexing area, that is, a frequency multiplexing area for indicating that each user equipment is allocated. For example, the at least one user equipment includes a user equipment

3) Usage information of the low power frequency reuse area.

The first providing device 4 provides the cooperation related information to the second node.

Specifically, the manner in which the first providing apparatus 4 provides the cooperation related information to the second node includes, but is not limited to:

1) The first providing device 4 further includes a first sub-providing device (not shown). Place The cooperation related information includes allocation information of the frequency reuse area, and the first sub-providing device provides the second node with benefit indicator information including the allocation information.

Specifically, the first sub-providing device provides the second node with benefit indicator information including the allocation information based on the existing X2 signaling for transmitting benefit metric (BM) information.

Preferably, the bit in the benefit indicator information corresponds to the user equipment, and the value on the bit identifies the frequency reuse region of the user equipment allocated to the bit. For example, the first obtaining device 2 acquires the spectral efficiency of the user equipments UE1, UE2, and UE3 on the spectrum multiplexing areas FR1 and FR3, respectively, where the number after the "UE" is used to indicate the ID (IDentification) of the user equipment, such as "1" in "UE1" is used to indicate that the ID of the user equipment is 1; the first determining means 3 determines the allocation information of the frequency-multiplexed areas FR1 and FR3 based on the above-mentioned frequency efficiency. The first sub-providing device converts the benefit indicator information to be added to the allocation information into a binary number, and uses the IDs of the user equipments to determine a bit corresponding to the user equipment, for example, the last bit of the binary number corresponds to the UE1. The second last bit corresponds to the UE2, and the third last bit corresponds to the UE3; and the first sub-providing device sets the value of the bit corresponding to each user equipment according to the allocation information, such as when setting the bit When the value on the bit is "0", the user equipment corresponding to the bit is allocated to FR1. When the value on the bit is "1", the user equipment corresponding to the bit is allocated to FR3. Next, A child providing device converts the binary number into a decimal number, and provides the second node with the benefit indicator information including the allocation information based on the existing X2 signaling for transmitting the benefit indicator information.

It should be noted that one benefit indicator information may be associated with one or more CoMP settings to quantify the expected benefit in the collaborative scheduling; if the first child providing device provides the benefit indicator information to the second node, the benefit indicator Information can always be provided to the second node in conjunction with the CoMP settings. The benefit indicator information may be determined based on the downlink measurement information, and the information granularity of the downlink channel state information may be a broadband or a subband, and the information granularity of the RSRP is a wideband. Therefore, as another solution of the implementation manner, the enhanced The benefit indicator information, the optional information granularity of the enhanced benefit indicator information includes a PRB level or a broadband level to support an associated CoMP setting, and is used in the embodiment. The two nodes provide collaboration related information.

2) The first providing device 4 further includes a second sub-providing device (not shown). The cooperation related information includes ratio information between frequency reuse regions based on the same frequency, and/or usage information of the low power frequency reuse region. The second sub-provider adds the scale information and/or the usage information to the CoMP settings and provides the CoMP settings to the second node.

Specifically, the second sub-providing device adds the ratio information and/or the usage information to a predefined CoMP setting format to generate a specific CoMP setting, and provides the CoMP setting to the second node; preferably The information granularity set by the CoMP is a PRB (Physical Resource Block) level or a broadband level.

3) The first providing device 4 further includes a third sub-providing device (not shown). The cooperation related information includes channel state information of each user equipment on each subband, and the cooperation related information includes usage information of a low power frequency reuse region. The third sub-providing device provides the usage information to the second node by transmitting enhanced RNTP signaling to the second node.

Preferably, when the third sub-providing device determines that the low-power region in the frequency multiplexing region is used, the third sub-providing device determines the usage information of the low-power region as the cooperation-related information or the cooperation-related information. Part of it, provided to the second node.

Specifically, the third sub-providing device can determine the low power region in the frequency division multiplexing region in a plurality of manners to make a power allocation decision. For example, the third sub-providing device may acquire a power threshold according to enhanced RNTP signaling from the second node, and determine a low-power region in the frequency division multiplexing region according to the power threshold to determine a power allocation; For example, the third sub-providing device may determine a low power region in the frequency division multiplexing region according to a predefined power threshold to make a power allocation decision.

It should be noted that, in the centralized CoMP network architecture, the first node may make a power allocation decision for the node it controls, and send the decision to all the second in the network architecture through the CoMP setting of the load information message. In the distributed CoMP network architecture, the first node may make a power allocation decision for the first node itself, and send the decision to the adjacent second node by the CoMP setting of the load information message.

It should be noted that, in the foregoing implementation manner, the first providing apparatus 4 uses the existing X2 signaling to provide cooperation related information to the second node, but those skilled in the art should understand that the first node and the first node New signaling is defined between the two nodes to provide cooperation related information from the first node to the second node. For example, in the X2 interface protocol, a definition of a signaling format of the allocation information may be added, and the first providing device 4 may employ the signaling format to provide the allocation information to the second node.

It should be noted that the above implementation manners may be combined. For example, the first sub-providing device adopts the above implementation manner 1) to provide the second node with the benefit indicator information including the allocation information, and the second sub-providing device uses the above implementation manner 2) to provide the second node with the added proportion information and The CoMP setting of the usage information; for example, the first sub-providing device may use the foregoing implementation manner 1) to provide the second node with the benefit indicator information including the allocation information, and the second sub-providing device adopts the foregoing implementation manner 2) The second node provides the CoMP setting to which the proportion information is added, and the third sub-provider device uses the above implementation manner 3) to send the enhanced RNTP signaling to the second node to provide the second node with the usage condition.

The second receiving device 5 of the second node receives the cooperation related information fed back by the first node. The scheduling device 6 of the second node schedules the at least one user equipment according to the cooperation related information.

Specifically, the scheduling device 6 uses the collaboration related information for the at least one The implementation of the scheduling of the user equipment includes but is not limited to:

1) The second receiving device 5 further includes a sub-receiving device (not shown), and the scheduling device 6 further includes a converting device (not shown), a second obtaining device (not shown), and a sub-scheduling device (not shown). The sub-receiving device receives the benefit indicator information including the allocation information; then the converting device converts the benefit index information into binary information; the second obtaining device obtains the allocation information of the frequency reuse region according to the converted binary information; The allocation information is scheduled for at least one user equipment attached to the second node.

For example, the conversion device converts the received benefit indicator information into binary information, and the second obtaining device determines, according to the converted binary information, that the user equipment UE1 and UE2 are allocated to the FR1, and the user equipment UE3 is assigned to the FR3. Then, the sub-scheduling device performs cooperative scheduling on UE1, UE2, and UE3 according to the allocation information.

2) the second receiving device 5 receives the CoMP setting from the first node; then the scheduling device 6 parses the CoMP settings according to the format definition of the CoMP setting, obtains the ratio information between the frequency reuse regions of the same frequency, and/or , usage information of low power frequency reuse area.

3) The second receiving device 5 receives the enhanced RNTP signaling from the first node; then the scheduling device 6 parses the enhanced RNTP signaling to obtain usage information of the frequency reuse region.

It should be noted that when new signaling is defined between the first node and the second node to provide cooperation related information from the first node to the second node, the scheduling apparatus 6 directly according to the format of the new signaling. , to resolve the collaboration-related information.

It should be noted that the above implementation manners may be combined. For example, the scheduling device 6 obtains the allocation information by using the foregoing implementation manner 1), and obtains the proportional information and the usage information by using the above implementation manner 2), and then, according to the allocation information, the proportional information, and the usage information, the scheduling device 6 Performing cooperative scheduling on the at least one user equipment; for example, the scheduling apparatus 6 obtains the allocation information by using the above implementation manner 1), and obtains the proportion information by using the foregoing implementation manner 2), and obtains the usage situation by using the foregoing implementation manner 3) Information, then, the scheduling device 6 is based on the allocation information, the proportion information, and the use Situation information, performing cooperative scheduling on the at least one user equipment.

In the prior art, cooperative scheduling is usually implemented based on FRR. Although this scheme can improve the throughput of the edge cell, the solution will reduce the average throughput of the system. Moreover, the FRR-based scheme brings some problems, such as the inability to divide radio resources based on multiplexing of different frequencies, and the inability to balance the load between adjacent cells.

FIG. 4 is a schematic structural diagram of a system for scheduling a user equipment according to another embodiment of the present invention. The system according to the present embodiment includes a first node and a second node, the first node comprising a first device, the first device comprising a first obtaining device 2, a first determining device 3 and a first providing device 4, wherein The first obtaining device 2 further includes a first receiving device 21 and a second determining device 22; the second node includes a second device, the first The second device comprises a transmitting device 1, a second receiving device 5 and a scheduling device 6. The transmitting device 1, the first obtaining device 2, the first determining device 3, the first providing device 4, the second receiving device 5, and the scheduling device 6 have been described in detail in the embodiment shown in FIG. This is included here by reference, and will not be described again.

In this implementation, the transmitting device 1 of the second node transmits downlink measurement information of at least one user equipment attached to the second node to the first node.

Specifically, the sending device 1 receives downlink measurement information of each user equipment attached to at least one user equipment of the second node, and sends downlink measurement information of each user equipment to the first node.

The first receiving device 21 receives downlink measurement information of the at least one user equipment from the second node.

For each of the at least one user equipment, the second determining device 22 determines the frequency efficiency of the user equipment on each of the frequency multiplexing regions available to the user equipment according to the downlink measurement information of the user equipment.

Specifically, for each user equipment of the at least one user equipment, the second determining device 22 determines, according to the downlink measurement information of the user equipment, that the user equipment is

1) The downlink measurement information of the user equipment includes the reference signal received power measured by the user equipment, and the second determining device 22 determines the spectral efficiency of the user equipment on each of the frequency reuse regions available to the user equipment based on the reference signal received power. .

Preferably, for each of the available frequency reuse regions, the second determining means 22 determines an average SINR of the user equipment on the frequency multiplexing region based on the reference signal received power, and determines the user according to the average SINR. The frequency efficiency of the device over the frequency reuse region.

As an example, the frequency reuse areas available to the user equipment include FR1 and FR3. The reference signal received power measured by the user equipment UE1 includes 9 signal strength information, respectively: Pi, Ρ ₂ , ..., Ρ ₉ , where is the signal strength information of the serving cell from UE1, Ρ ₂ , .. P ₉ is the signal strength information of 8 primary neighboring cells from UE1, and the identifiers of the 8 primary neighboring cells are j, j=2, ..., 9. Then the second determining means 22 calculates, based on the following formula, UE1 R on FR1:

Wherein, the SINR is the average SINR of UE1 on FR1; the SINR is the average SINR of UE1 on FR3; ., _/ = 2, ..., 9 is the signal strength information from the primary neighboring cell j, where, when UE1 When on FR1, the eight primary neighboring cells are all interfering cells of the serving cell of UE1; it is white noise power.

And, the second determining means 22 calculates the average SINR of UE1 on FR3 based on the following formula:

SINR

(Ρ ₄ +Ρ ₇ )+σ ^ζ

Wherein, the sum is the signal strength information from the primary neighboring cells 4 and 7; wherein, when the UE1 is on the FR3, the interfering cell of the serving cell of the UE1 includes the primary neighboring cell 4 and the primary neighboring cell 7. Next, the second determining means 22 calculates the spectral efficiency of UE1 on FR1 and the spectral efficiency of UE1 on FR3 based on the following formula:

SE _i =log ₂ (l + curtain)

SE _m ,=\og ₂ (l + SINR _m ,)

2) The downlink measurement information of the user equipment includes downlink channel state information measured by the user equipment on the system bandwidth, or downlink channel state information measured by the user equipment on each subband, and the second determining device 22 is based on the downlink channel state. Information to determine the spectral efficiency of the user equipment on each frequency reuse region it is available to.

Preferably, for each of the available frequency reuse regions, the second determining device 22 determines an average SINR of the user equipment on the frequency multiplexing region based on the downlink channel state information, and determines the user according to the average SINR. The frequency of the device on the frequency reuse area Language efficiency.

As an example, the frequency reuse area available to the user equipment includes FR1 and FR3, and the second determining means 22 determines the downlink channel state information measured by the user equipment UE1 on the system bandwidth, or the user equipment measures on each subband. The downlink channel state information is used to determine the average CQI of UE1 on FR1 and FR3, respectively, and determine the average SINR of UE1 on FR1 according to the average CQI of UE1 on FR1, that is, ^^, and determine UE1 according to the average CQI of UE1 on FR3. The average SINR on FR3, that is, ^^; Next, the second determining means 22 calculates the spectral efficiency of UE1 on FR1 and the spectral efficiency of UE1 on FR3 based on the following formula:

SE _ffil = log ₂ (l + R _FR1 )

SE ₃ = log ₂ (l + 57NR _FR3 )

According to the solution of the embodiment, the first node may determine, according to the downlink measurement information that it receives, the spectral efficiency of each user equipment in the at least one user equipment in each of the available spectrum multiplexing regions, without New signaling is defined between the first node and the second node to transmit the spectral efficiency, which can implement information transmission based on existing X2 signaling without changing the existing protocol. It should be noted that the present invention can be implemented in software and/or a combination of software and hardware. For example, the various devices of the present invention can be implemented using an application specific integrated circuit (ASIC) or any other similar hardware device. In one embodiment, the software program of the present invention may be executed by a processor to implement the steps or functions described above. Likewise, the software program (including related data structures) of the present invention can be stored in a computer readable recording medium, for example For example, RAM memory, magnetic or optical drives or floppy disks and similar devices. Additionally, some of the steps or functions of the present invention may be implemented in hardware, for example, as a circuit that cooperates with a processor to perform various steps or functions.

It is apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the invention is defined by the appended claims All changes in the meaning and scope of equivalent elements are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim. In addition, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. The plurality of units or devices recited in the system claims may also be implemented by a unit or device by software or hardware. The first and second terms are used to denote names and do not represent any particular order.

Claims

Claim

A first device for providing cooperation related information to a second node in a first node, wherein the first device comprises:

2. The first device according to claim 1, wherein the cooperation related information comprises at least one of the following:

- allocation information of the frequency reuse area;

- ratio information between frequency reuse regions based on the same frequency;

- Usage information for low power frequency reuse areas.

The first device according to claim 2, wherein the cooperation related information includes the allocation information, and the providing device comprises the following devices:

a first sub-providing device, configured to provide the second node with benefit indicator information including the allocation information, where a bit in the benefit indicator information corresponds to a user equipment, and a value identifier on the bit is assigned to the The frequency reuse region of the user equipment of the bit.

The first device according to claim 2, wherein the cooperation related information includes the ratio information and/or the usage information, and the providing device comprises the following devices:

And a second sub-providing device, configured to add the ratio information and/or the usage information to the CoMP setting, and provide the CoMP setting to the second node.

The first device according to claim 2, wherein the downlink measurement information includes channel state information of each user equipment on each subband, and the cooperation related information The usage information includes the usage information, and the providing device includes: a third sub-providing device, configured to provide the second node with the usage information by sending enhanced RNTP signaling to the second node The information granularity of the enhanced RNTP signaling is extended to a frequency domain or a time domain.

The first device according to any one of claims 1 to 5, wherein the first obtaining means comprises the following means:

a first receiving device, configured to receive downlink measurement information of the at least one user equipment from the second node;

The second determining means is configured to determine, for each user equipment of the at least one user equipment, a frequency efficiency of the user equipment on each frequency reuse area that is available to the user equipment according to downlink measurement information of the user equipment.

7. A second apparatus for scheduling a user equipment attached to the second node in a second node, wherein the second apparatus comprises the following:

The second receiving device is configured to receive the collaboration related information that is fed back by the first node, and the scheduling device is configured to schedule the at least one user equipment according to the collaboration related information.

8. The second device according to claim 7, wherein the cooperation related information comprises at least one of the following:

- allocation information of the frequency reuse area;

- Usage information for low power frequency reuse areas.

9. The second device according to claim 8, wherein the cooperation related information includes the allocation information, and the second receiving device comprises:

a sub-receiving device, configured to receive benefit indicator information including the allocation information, where a bit in the benefit indicator information corresponds to a user equipment, and a value on the bit identifies a frequency reuse region of the user equipment allocated to the bit ; The scheduling device includes the following devices:

a conversion device, configured to convert the benefit indicator information into binary information; and second obtaining means, configured to obtain the allocation according to the converted binary information

Ί^- ,

And a sub-scheduling device, configured to schedule the at least one user equipment according to the allocation information.

10. A method for providing collaboration related information to a second node in a first node, wherein the method comprises the steps of:

Obtaining, for each user equipment of the at least one user equipment, a frequency efficiency of the user equipment on each frequency reuse area available to the user equipment, where the at least one user equipment is attached to the second node ;

Determining, according to a spectral efficiency of the at least one user equipment, collaboration related information for the second node, the cooperation related information being used by the second node to schedule the at least one user equipment;

c providing the collaboration related information to the second node.

The method according to claim 10, wherein the collaboration related information includes at least one of the following:

- allocation information of the frequency reuse area;

- Usage information for low power frequency reuse areas.

12. The method according to claim 10 or 11, wherein the step a comprises the following steps:

Receiving downlink measurement information of the at least one user equipment from the second node;

A2. For each user equipment of the at least one user equipment, determining, according to the downlink measurement information of the user equipment, the frequency efficiency of the user equipment on each frequency reuse area that is available to the user equipment.

13. A method for scheduling a user equipment attached to the second node in a second node, wherein the method comprises the steps of: A. transmitting downlink measurement information of the at least one user equipment attached to the second node to the first node, or each user equipment of the at least one user equipment is on each frequency reuse area available to the user equipment Frequency efficiency

B. receiving collaboration related information fed back by the first node;

C. scheduling the at least one user equipment according to the collaboration related information.

14. The method according to claim 13, wherein the collaboration related information comprises at least one of the following:

- allocation information of the frequency reuse area;

- Usage information for low power frequency reuse areas.

A system comprising the first device of any one of claims 1 to 6, and the second device of any one of claims 7 to 9.