WO2012103812A1 - 一种信道资源调度方法、系统及基站 - Google Patents

一种信道资源调度方法、系统及基站 Download PDF

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Publication number
WO2012103812A1
WO2012103812A1 PCT/CN2012/070830 CN2012070830W WO2012103812A1 WO 2012103812 A1 WO2012103812 A1 WO 2012103812A1 CN 2012070830 W CN2012070830 W CN 2012070830W WO 2012103812 A1 WO2012103812 A1 WO 2012103812A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
uplink
downlink
scheduled
information
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PCT/CN2012/070830
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English (en)
French (fr)
Inventor
李海朝
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2012103812A1 publication Critical patent/WO2012103812A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24Cell structures
    • H04W16/28Cell structures using beam steering

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a channel resource scheduling method, system, and base station. Background technique
  • the base station After receiving the uplink channel data, the base station calculates a transmission weight of the downlink channel data sent by the base station according to the weight formula (1) of the NF, so that when the base station transmits data according to the calculated transmission weight, the main lobe alignment of the transmitted waveform is performed.
  • the target user equipment, and the nulls are aligned with the interfered user equipment, thereby reducing interference between cells.
  • the channel information ⁇ uplink channel data received by the base station to the destination user equipment, h ' is the uplink channel data received from the base station to the interfering user equipment channel information is received noise, N being the number of interfering user equipment.
  • the user equipment 1 accesses the base station 1 for communication
  • the user equipment 2 accesses the base station 2 for communication.
  • the base station 1 may receive uplink channel data sent by multiple user equipments, including interference with uplink channel data sent by the user equipment 2 (direction indicated by a dotted arrow in the figure); calculated according to formula (1)
  • the main lobe of the transmitted waveform is aligned with the user equipment 1, and the formed null is aligned with the user equipment 2, so that the interference to the user equipment 2 can be reduced.
  • the base station calculates the transmission weight based on the received uplink data. To ensure that the base station sends the downlink data according to the transmission weight, it can suppress the interference received by the interfering user equipment that sends the uplink data, and interfere with the uplink and downlink resources of the user equipment. Need to be scheduled on the same frequency band. However, if the uplink data received by the base station corresponds to multiple interfering user equipments, the interfering user equipments may not be scheduled at the downlink scheduling moment of the base station, so that the interference suppression effect is not achieved. Summary of the invention
  • Embodiments of the present invention provide a channel resource scheduling method, system, and base station, which improve the effect of suppressing interference.
  • An aspect of the present invention provides a channel resource scheduling method, including:
  • the downlink frequency band of the user equipment is the same as the frequency band in which the corresponding user equipment transmits the uplink channel information.
  • a base station including:
  • a pre-scheduling unit configured to perform pre-scheduling on user equipment corresponding to the downlink resource in the at least one subframe, to obtain pre-scheduled user equipment information
  • An uplink scheduling unit configured to schedule a corresponding uplink resource according to the pre-scheduled user equipment information, and send the scheduled uplink resource information to the scheduled user equipment by using an uplink grant;
  • the weight calculation unit is configured to: when receiving the uplink channel information sent by the user equipment according to the uplink grant, calculate a downlink transmission weight of the null trap NF according to the uplink channel information;
  • a downlink scheduling unit configured to schedule downlink resources according to user equipment information pre-scheduled by the pre-scheduling unit and uplink resource information scheduled by the uplink scheduling unit, and perform downlink transmission weights of the NF calculated by the weight calculation unit in at least one subframe,
  • the scheduled downlink resource information is sent to the user equipment.
  • the downlink frequency band of each scheduled user equipment in the downlink resource information is the same as the frequency band in which the corresponding user equipment sends the uplink channel information.
  • Embodiments of the present invention provide a channel resource scheduling system, including the foregoing base station.
  • the base station performs pre-scheduling on the user equipment corresponding to the downlink resource in the at least one subframe to obtain the pre-scheduled user equipment information, and refers to the pre-scheduled user equipment information in the uplink resource scheduling, and after uplink scheduling.
  • the uplink resource information is sent to the scheduled user equipment by using the uplink grant; after receiving the uplink channel information sent by the user equipment, the base station calculates the downlink transmission weight of the NF; when the pre-scheduled at least one subframe arrives, each of the The downlink frequency band of the user equipment is scheduled to be in the same frequency band as that of the corresponding user equipment, and the downlink resource information is sent to the user equipment according to the calculated downlink transmission weight of the NF.
  • the downlink frequency band of the user equipment is scheduled to be in the same frequency band as that of the corresponding user equipment, so that the information generated by the downlink information transmitted by the base station is interfered with the user equipment, and the interference between the cells is reduced;
  • the pre-scheduled user equipment information in the uplink resource scheduling it is ensured that the uplink and downlink scheduled user equipments are consistent, so that the interfered user equipment is scheduled to be downlinked, thereby improving the effect of NF suppression interference.
  • FIG. 1 is a schematic structural diagram of an NF suppression interference user equipment
  • FIG. 2 is a flowchart of a channel resource scheduling method according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a channel transmission data sub-frame in a base station according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of parameter entropy of a channel resource scheduling method according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a method for pre-scheduling user equipment information corresponding to downlink resources in at least one subframe according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a mechanism for transmitting another data channel in a base station according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of another base station according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a channel resource scheduling method.
  • the flowchart is as shown in FIG. 2.
  • the system applicable to the method in this embodiment includes two or more base stations, and each base station performs resource scheduling according to the method in this embodiment. , including:
  • the user equipment (UE) corresponding to the downlink resource in the at least one subframe is pre-scheduled to obtain pre-scheduled user equipment information;
  • the ratio of the channel transmission data subframe of the base station is fixed, where at least one subframe is any one or more subframes with downlink resources after the subframe that the base station receives the uplink data of the scheduled user equipment, and
  • the constraint relationship between the subframe in which the base station receives the uplink data and the at least one subframe may be preset in the base station, and the content of the specific constraint relationship does not constitute a limitation of the present invention.
  • some subframes have only uplink (UL) resources, such as #n subframes; some subframes have only downlink (DL) resources, such as thousands of frames;
  • a frame is a special subframe (SP) with both uplink and downlink resources, such as #y subframe. (Subframes other than #m, #n, #z, #x, and # are not shown in the figure.)
  • the base station can receive the uplink data of the user equipment in the #n subframe, and the base station can pre-schedule the #n subframe.
  • the user equipment corresponding to the downlink resource in the subsequent subframe may also pre-schedule the user equipment corresponding to the downlink resource in the two subframes after the #n subframe (such as #n and #x subframes). .
  • the user equipment information corresponding to the specific pre-scheduled downlink resources may include: the identifier information of the scheduled user equipment, the number of resources required for each user equipment downlink, and the like, and may also include the priority information of the user equipment that is scheduled.
  • the pre-scheduled user equipment information may be information that the base station according to the quality of service (QoS) (or channel quality information) of the covered user equipment, the service cache, and the number of resources required by the service, according to a preset algorithm.
  • QoS quality of service
  • the algorithm rules preset here may be technical means commonly used by those skilled in the art, and are not described herein.
  • the service cache of the user equipment should be the current service cache of the user equipment, and the current child.
  • the amount of resources allocated by the user equipment to the pre-scheduled subframe ie, at least one subframe is subtracted.
  • the corresponding uplink resource is scheduled according to the pre-scheduled user equipment information, and the scheduled uplink resource information is sent to the scheduled user equipment by using an uplink grant (UL Grant);
  • UL Grant uplink grant
  • the base station may perform scheduling according to the pre-scheduled user equipment information.
  • the pre-scheduled user equipment information includes the identifier information of the scheduled user equipment and the number of resources required for each user equipment downlink. Determining, in uplink scheduling, the location of the scheduled user equipments in the uplink channel (such as which frequency bands in the uplink channel the user equipment transmits), and determining the number of resources occupied by each scheduled user equipment in the uplink channel. The number of required resources for the user equipment that is pre-scheduled.
  • the pre-scheduled user equipment information includes not only the identifier information of the scheduled user equipment and the number of resources required for each user equipment downlink, but also the priority of the user equipment, in the uplink scheduling, the priority is determined according to the priority. The priority of these user equipment uplink resource allocation.
  • the scheduled uplink resource information is correspondingly sent to the scheduled user equipment by using the uplink grant.
  • the base station calculates the downlink transmission weight of the NF according to the uplink channel information.
  • the user equipment after receiving the uplink authorization, sends the uplink channel information to the base station according to the uplink resource information authorized by the base station.
  • the uplink channel information received by the base station has other uplink channel information that interferes with the user equipment, and the base station calculates the uplink channel information according to the uplink channel information and the above-mentioned NF weight calculation formula (1).
  • the downlink transmission weight of NF is the downlink transmission weight of NF.
  • the uplink grant is sent to the scheduled user equipment in the #m subframe; when the base station receives the uplink channel sent by the user equipment in the #n subframe.
  • the information may include a Demodulation Reference Symbol (DMRS) in the uplink channel information, and may also include information such as a Sounding Reference Symbol (SRS); when the base station receives the uplink channel information in the #n subframe.
  • DMRS Demodulation Reference Symbol
  • SRS Sounding Reference Symbol
  • the downlink transmission weight of the NF is calculated according to the formula (1).
  • the downlink resource is scheduled according to the pre-scheduled user equipment information and the scheduled uplink resource information, and the scheduled downlink resource information is sent to the user equipment according to the downlink transmission weight of the NF in at least one subframe.
  • Downstream frequency bands of scheduled user equipments The frequency band in which the corresponding user equipment transmits the uplink channel information is the same.
  • the base station When the pre-scheduled sub-frame arrives in step 101, the base station needs to schedule the resource band for receiving the downlink channel information by the user equipment on the frequency band in which the corresponding user equipment sends the uplink channel information, and according to step 103, The calculated downlink transmission weight sends the downlink resource information scheduled in this step to the user equipment. This ensures that the nulls generated in the downlink channel information transmitted by the base station are interfered with the user equipment, and the interference between the cells can be reduced.
  • the base station pre-schedules the user equipment corresponding to the downlink resource in the # ⁇ subframe in the pre-scheduling, and then calculates the uplink channel information of the user equipment after the #n subframe receives the uplink channel information.
  • the transmission weight of the NF when the # 2 subframe arrives, the base station sends the downlink resource information to the user equipment according to the transmission weight of the NF.
  • the uplink channel information received by the base station in step 103 includes the uplink channel information of other interfering user equipments, it indicates that other base stations schedule the interfering user equipments in the uplink, and the uplink scheduling of other base stations refers to the pre-predetermined
  • the user equipment information corresponding to the scheduled downlink resources is scheduled to be dispatched to the interfering user equipments in the downlink of other base stations, and the effect of NF suppression interference is well improved.
  • the base station performs pre-scheduling on the user equipment corresponding to the downlink resource in the at least one subframe to obtain the pre-scheduled user equipment information, and refers to the pre-scheduled user equipment information when scheduling the uplink resource, and
  • the scheduled uplink resource information is sent to the scheduled user equipment by using the uplink grant; after receiving the uplink channel information sent by the user equipment, calculating the downlink transmission weight of the NF; when the pre-scheduled at least one subframe arrives, each will The downlink frequency band of the user equipment is scheduled to be in the same frequency band as that of the corresponding user equipment, and the downlink resource information is sent to the user equipment according to the calculated downlink transmission weight of the NF.
  • the downlink frequency band of each user equipment is scheduled to be in the same frequency band as that of the corresponding user equipment, so that the information generated by the downlink downlink information of the base station is aligned to interfere with the user equipment, and the inter-cell interference is reduced. And by referring to the pre-scheduled user equipment information in the uplink scheduling, it is ensured that the uplink and downlink scheduled user equipments are consistent, so that the interfered user equipment is scheduled to be downlinked, thereby improving the effect of NF suppression interference.
  • the channel resource scheduling method according to the embodiment of the present invention has a cell average throughput rate gain of 11.1% compared to the existing method, and the edge user throughput rate is 11.1%.
  • the gain is 58.2%, and it can be seen that the method of the embodiment of the invention can improve the effect of the existing NF suppression interference.
  • the base station may implement the following steps:
  • A calculating a priority of the covered user equipment according to the quality of service or channel quality information of the user equipment covered by the base station;
  • the priority value of the user equipment is calculated according to the following priority formula (2):
  • W is the maximum transmission rate supported by the location of the user equipment at time t, which is obtained according to the QoS parameters of the user equipment; W represents the scheduling rate actually obtained by the user equipment in the previous period.
  • the channel quality indicator (CQI) in the user equipment report received in each transmission time interval ( ⁇ ) is directly sorted to obtain the priority of the user equipment.
  • determining, according to the service cache of the user equipment that is covered and the number of resources required by the service, the identifier information of the scheduled user equipment and the number of resources required for the downlink; wherein the service cache is the current service cache of the user equipment that is covered, and the current child The user equipment covered by the frame to the at least one subframe is subtracted from the amount of resources scheduled to be allocated.
  • the rate of the required resources is different.
  • the guaranteed bit rate (GBR) service in the LTE service needs to reach a certain guaranteed bit rate to operate normally.
  • the number of resources; the non-guaranteed bit rate (Non-GBR) service in the LTE service only needs to ensure that the aggregate maximum bit rate (AMBR) is not exceeded, and only b resources are needed.
  • the service cache of the user equipment is bound to the number of resources allocated to the user equipment. If the service cache of the user equipment is less than the number of resources required by the user equipment, the number of downlink required resources and the service cache pre-scheduled for the user equipment. The same is true. For example, if the service buffer of the user equipment is 10 resources, and the number of resources required for the user equipment service is 12, the user equipment pre-schedules 10 resources.
  • the scheduled user equipment determined in step B can be calculated in step A. All user equipments in the priority level may also be part of the user equipments.
  • the uplink and downlink channels are asymmetric, for example, the number of resources required for uplink and downlink is different, and the uplink scheduling in step 102 is performed according to the scheduled user.
  • the information of the device such as the current service cache and the number of resources required by the service, calculates the number of resources required for the uplink of the scheduled user equipment; and then calculates the calculated number of uplink required resources and the pre-scheduled downlink requirements. The number of resources is compared.
  • the uplink code rate that is, the rate at which the uplink information is sent
  • the padding information of the corresponding user equipment needs to be determined, so that the actual required resources in the uplink are equal to the number of resources required for the pre-scheduled downlink. Therefore, the downlink code rate of the pre-scheduled user equipment is reduced to increase the number of uplink resources allocated by the user equipment; or the information is used to increase the number of uplink resources allocated by the user equipment.
  • the method for the base station to calculate the number of resources required for the uplink of the user equipment is similar to the method for determining the number of resources required for the downlink in the foregoing step B, except that one parameter is used, that is, the user is used when calculating the required number of uplink resources.
  • the current service cache of the device is similar to the method for determining the number of resources required for the downlink in the foregoing step B, except that one parameter is used, that is, the user is used when calculating the required number of uplink resources.
  • the number of uplink required resources of the user equipment is greater than the number of resources required for the downlink, the number of uplink resources scheduled for the user equipment is calculated by the user equipment.
  • the downlink resource is scheduled in step 104, the number of downlink required resources scheduled for the corresponding user equipment is the calculated uplink required resource number.
  • the channel estimation formula is obtained according to the DRMS parameter in the received uplink channel information ( 1), and calculate the downlink transmission weight of the NF according to the formula (1); then, when performing the downlink resource scheduling in step 104, scheduling the downlink frequency band of each scheduled user equipment to send the DMRS on the uplink of the corresponding user equipment.
  • the frequency band the same frequency band on the downlink channel as the uplink receiving DMRS can be preferentially scheduled, and then the other frequency bands on the downlink channel are re-scheduled.
  • the number of interfering user equipments is reduced when calculating the downlink transmission weight of the NF, and the interference user equipment can be scheduled to be scheduled in the downlink, thereby improving the NF.
  • the effect of suppressing interference since the single-user reception is supported when the DMRS is received, the number of interfering user equipments is reduced when calculating the downlink transmission weight of the NF, and the interference user equipment can be scheduled to be scheduled in the downlink, thereby improving the NF. The effect of suppressing interference.
  • the downlink transmission weight of the BF may be calculated on the frequency band in which the SRS is received; then, the service data is asymmetric on the uplink and downlink channels, for example, required by the user equipment.
  • the number of resources is different from the number of resources in the uplink scheduling information
  • the downlink resource information is sent to the user equipment, there is no corresponding NF downlink transmission weight on the frequency band (such as the first frequency band) on the downlink channel.
  • the base station sends the downlink resource information on the frequency band, the base station may follow The downlink transmission weight of the calculated BF sends the downlink resource information to the user equipment.
  • the channel resource scheduling method includes:
  • the base station After the base station pre-schedules the user equipment corresponding to the downlink resource in the #Z subframe, the base station allocates the uplink resource according to the pre-scheduled user equipment information, and passes the scheduled uplink resource information in the #M subframe. Sending to the scheduled user equipment; when the base station receives the uplink channel information in the #X subframe, calculates the downlink transmission weight of the NF according to the uplink channel information; finally, the base station schedules the downlink according to the pre-scheduled user equipment information and the scheduled uplink resource information. The resource, and the downlink resource information is sent to the user equipment according to the calculated downlink transmission weight in the #Z subframe.
  • the downlink frequency band of each of the scheduled user equipments is the same as the frequency band of the corresponding user equipment transmitting the uplink channel information.
  • the base station pre-schedules the user equipment corresponding to the downlink resource in the # ⁇ and #0 subframes in advance; then, the uplink resource is scheduled according to the pre-scheduled user equipment information, and the uplink resource to be scheduled in the #N subframe
  • the information is sent to the scheduled user equipment by using the uplink grant; when the base station receives the uplink channel information in the # ⁇ subframe, the downlink transmission weight of the NF is calculated according to the uplink channel information; and finally, the base station according to the pre-scheduled user equipment information, the scheduled uplink
  • the resource information is used to schedule the downlink resource, and the downlink resource information is sent to the user equipment according to the calculated downlink transmission weight in the #W and #0 subframes.
  • the downlink frequency band of each of the scheduled user equipments is the same as the frequency band in which the corresponding user equipment transmits the uplink channel information.
  • the base station receives the subframe corresponding to the uplink channel information and the subframe that sends the downlink resource information.
  • the number of subframes to be pre-scheduled needs to be separated, and the subframe that needs to be pre-scheduled by the base station is: the base station receives the uplink channel information corresponding subframe plus the preset number of subframes or any one of the downlink resources. frame.
  • FIG. 7 An embodiment of the present invention provides a base station, and a schematic structural diagram is shown in FIG. 7, which includes:
  • the pre-scheduling unit 10 is configured to perform user equipment corresponding to the downlink resource in the at least one subframe. Pre-scheduling, obtaining pre-scheduled user equipment information;
  • the uplink scheduling unit 20 is configured to schedule the corresponding uplink resource according to the pre-scheduled user equipment information obtained by the pre-scheduling unit 10, and send the scheduled uplink resource information to the scheduled user equipment by using an uplink grant;
  • the uplink scheduling unit 20 may determine the location of the scheduled user equipments in the uplink channel when performing uplink scheduling.
  • the information, and determining the number of resources occupied by the scheduled user equipment in the uplink channel is the number of resources required for the downlink of the corresponding user equipment;
  • the uplink scheduling unit 20 may further determine the priority of the user equipment uplink resource allocation according to the priority of the scheduled user equipment.
  • the weight calculation unit 30 is configured to: when receiving the uplink channel information sent by the user equipment according to the uplink grant, calculate, according to the uplink channel information, a downlink transmission weight of the null trap NF;
  • the downlink scheduling unit 40 is configured to schedule downlink resources according to user equipment information pre-scheduled by the pre-scheduling unit 10 and uplink resource information scheduled by the uplink scheduling unit 20, and perform downlink transmission of the NF calculated by the weight calculation unit 30 in at least one subframe.
  • the downlink frequency band of each scheduled user equipment in the downlink resource information is the same as the frequency band in which the corresponding user equipment sends the uplink channel information.
  • the at least one subframe may be: the base station receives the subframe corresponding to the uplink channel information, and adds one or more subframes with downlink resources after the preset number of subframes.
  • the downlink scheduling unit 40 schedules the downlink frequency band of each scheduled user equipment in the uplink receiving DMRS of the corresponding user equipment when scheduling the downlink resource. On the frequency band.
  • the pre-scheduling unit 10 pre-schedules the user equipment corresponding to the downlink resource in the at least one subframe to obtain the pre-scheduled user equipment information
  • the uplink scheduling unit 20 refers to the pre-scheduling when scheduling the uplink resource.
  • Scheduling user equipment information and transmitting the scheduled uplink resource information to the scheduled user equipment by using the uplink grant; after the weight calculation unit 30 receives the uplink channel information sent by the user equipment, calculating the downlink transmission weight of the NF; When the pre-scheduled at least one subframe arrives, the downlink scheduling unit 40 schedules the downlink frequency band of each scheduled user equipment in the same frequency band that the corresponding user equipment transmits the uplink channel information, according to the calculated downlink transmission weight of the NF. The downlink resource information is sent to the user equipment.
  • the base station in this embodiment is By scheduling the downlink frequency band of the user equipment in the same frequency band as that of the corresponding user equipment to transmit the uplink channel information, it is ensured that the information generated by the downlink downlink information of the base station is interfered with the user equipment, and the interference between the cells is reduced;
  • the scheduling of the pre-scheduled user equipment information ensures that the user equipments scheduled by the uplink and downlink are consistent, so that the interfered user equipment is scheduled to be downlinked, thereby improving the effect of NF suppression interference.
  • the pre-scheduling unit 10 in the base station of the embodiment may be implemented by the priority calculating unit 110 and the downlink resource determining unit 210, and the uplink scheduling unit 20 may be configured by the uplink resource calculating unit. 201.
  • the uplink determining unit 202 and the resource number determining unit 203 are implemented, where:
  • the priority calculation unit 110 is configured to calculate a priority of the covered user equipment according to the quality of service or channel quality information of the user equipment covered by the base station;
  • the downlink resource determining unit 210 is configured to determine the identifier information of the scheduled user equipment and the number of downlink required resources according to the service buffer of the user equipment and the number of resources required by the service, where the service cache is the current service of the user equipment that is covered. Cache, the user equipment covered by the current subframe to the at least one subframe is reduced by the amount of resources scheduled to be allocated;
  • the uplink resource calculation unit 201 is configured to calculate, according to the current service buffer of the scheduled user equipment and the number of resources required by the service, the number of uplink required resources of the scheduled user equipment.
  • the uplink determining unit 202 is configured to determine, when the number of uplink required resources calculated by the uplink resource calculating unit 201 is smaller than the number of downlink required resources, determine the uplink code rate or uplink padding information of the corresponding user equipment, so that the actual required resources in the uplink Equal to the number of resources required for the downlink;
  • the resource number determining unit 203 is configured to: when the number of uplink required resources calculated by the uplink resource calculating unit 201 is greater than the number of downlink required resources, the number of uplink required resources scheduled by the corresponding user equipment is calculated as the uplink required. Number of resources;
  • the downlink scheduling unit 40 schedules the downlink resource
  • the number of downlink required resources scheduled for the corresponding user equipment is the calculated uplink required resource number.
  • the priority of the user equipment covered by the base station is calculated by the priority calculation unit 110 in the pre-scheduling, and the identification information and the downlink information of the scheduled user equipment in the user equipment are obtained by the downlink resource determining unit 210. Number of resources required;
  • the uplink resource calculation unit 201 calculates the number of uplink required resources.
  • the resource number determining unit 203 determines that the uplink resource number is The number of resources calculated by the uplink resource calculation unit 201; If the number of required resources is less than the number of resources required for the downlink, the uplink determining unit 202 determines the uplink code rate or the uplink padding information according to the number of uplink required resources, so that the number of uplink actual required resources and the resources determined by the downlink resource determining unit 210.
  • the uplink resource unit (the number of uplink required resources determined by the resource number determining unit 203; or the uplink code rate or uplink padding information determined by the uplink determining unit 202) is sent by the uplink scheduling unit 20 to the scheduled by the uplink grant.
  • the weight calculation unit 30 receives the uplink channel information, the downlink transmission weight of the NF is calculated; the downlink scheduling unit 40 determines the user equipment information determined by the downlink resource determining unit 210 and the uplink scheduled by the uplink scheduling unit 20.
  • the resource information (including the uplink required source determined by the resource number determining unit 203) is sent to the user equipment.
  • the base station in this embodiment may further include a beam weight calculation unit 50, where the uplink channel information received by the weight calculation unit 30 includes the sounding reference information SRS, and the downlink of the BF is calculated according to the SRS.
  • the uplink channel information received by the weight calculation unit 30 includes the sounding reference information SRS, and the downlink of the BF is calculated according to the SRS.
  • the downlink scheduling unit 40 is further configured to: when there is no corresponding NF downlink transmission weight on the first frequency band of the downlink channel, the downlink transmission weight of the BF calculated by the beam weight calculation unit in the first frequency band, and the downlink resource The information is sent to the user device.
  • the beam weight calculation unit 50 may calculate the downlink transmission weight of the BF on the frequency band in which the SRS is received; If the number of resources required for the downlink of the user equipment is different from the number of resources in the uplink scheduling information, when the downlink resource information is sent to the user equipment, the frequency band (such as the first frequency band) on the downlink channel may appear. If there is no corresponding NF downlink transmission weight, the base station may send the downlink resource information to the user equipment according to the calculated downlink transmission weight of the BF when the downlink resource information is sent in the frequency band.
  • the embodiment of the present invention further provides a channel resource scheduling system, and the structure of the base station included is as shown in FIG. 7 or 8.
  • the program can be stored in a computer readable storage medium.
  • the storage medium can include: Read only memory (ROM), random access memory (RAM), magnetic or optical disk, and the like.

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Description

一种信道资源调度方法、 系统及. 本申请要求了 2011年 02月 1 日提交的、 申请号为 201110034463.6、发 明名称为"一种信道资源调度方法、 系统及基站"的中国申请的优先权,其全 部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域, 特别涉及信道资源调度方法、 系统及基站。 背景技术
在现有的长期演进计划( Long Term Evolution, LTE )的通信网络中, 基 站釆用波束赋形 (Beam Forming, BF )技术发送下行数据时, 可以提高用 户设备的接收功率, 但是这种技术没有考虑对邻区用户设备的干扰。 而釆 用零陷赋形(Null Forming, NF )技术可以减小小区间干扰, 具体地, 通过 如下的方法来实现:
基站在接收到上行信道数据后, 根据 NF的权值公式(1 )计算基站发送 下行信道数据的发射权值, 这样当基站按照计算的发射权值发射数据时, 则发射波形的主瓣对准目标用户设备, 而让零陷对准被干扰的用户设备, 从而减小小区间的干扰。
Figure imgf000003_0001
其中 Α为接收的上行信道数据中基站到目标用户设备的信道信息, h '为 接收的上行信道数据中基站到干扰用户设备的信道信息, 为接收噪声, N 为干扰用户设备数。
例如, 参考图 1所示, 假设用户设备 1接入基站 1进行通信, 而用户设备 2 接入基站 2进行通信。 当基站 1在上行信道接收数据时, 可以接收到多个用 户设备发送的上行信道数据, 包括干扰用户设备 2发送的上行信道数据(图 中虚线箭头所指方向); 在按照公式(1 )计算的发射权值发送数据时, 发 射波形的主瓣对准用户设备 1 , 形成的零陷对准用户设备 2 , 这样就能减低 对用户设备 2的干扰。
由于基站在计算发射权值时是基于接收的上行数据计算的, 为了保证 基站按照该发射权值发送下行数据时, 能抑制发送上行数据的干扰用户设 备受到的干扰, 干扰用户设备的上下行资源需要被调度在相同的频带上。 但是如果基站接收的上行数据对应干扰用户设备有多个, 这些干扰用户设 备不一定会在基站的下行调度时刻被调度到, 这样就不会达到抑制干扰的 效果。 发明内容
本发明实施例提供信道资源调度方法、 系统及基站, 改善抑制干扰的 效果。
本发明一方面提供一种信道资源调度方法, 包括:
对至少一个子帧中下行资源对应的用户设备进行预调度, 得到预调度 的用户设备信息;
根据预调度的用户设备信息调度相应的上行资源, 并将该调度的上行 资源信息通过上行授权发送给被调度的用户设备;
当接收到用户设备根据上行授权发送的上行信道信息, 根据上行信道 信息计算得到零陷赋形 NF的下行发射权值;
根据预调度的用户设备信息和上行资源信息调度下行资源, 并在至少 一个子帧按照 NF的下行发射权值,将调度的下行资源信息发送给用户设备; 其中下行资源信息中每个被调度的用户设备的下行频带与相应用户设备发 送上行信道信息的频带相同。
本发明另一方面提供一种基站, 包括:
预调度单元, 用于对至少一个子帧中下行资源对应的用户设备进行预 调度, 得到预调度的用户设备信息;
上行调度单元, 用于根据预调度单元预调度的用户设备信息调度相应 的上行资源, 并将调度的上行资源信息通过上行授权发送给被调度的用户 设备;
权值计算单元, 用于当接收到用户设备根据上行授权发送的上行信道 信息, 根据上行信道信息计算得到零陷赋形 NF的下行发射权值;
下行调度单元, 用于根据预调度单元预调度的用户设备信息和上行调 度单元调度的上行资源信息调度下行资源, 并在至少一个子帧按照权值计 算单元计算的 NF的下行发射权值,将调度的下行资源信息发送给用户设备; 其中下行资源信息中每个被调度的用户设备的下行频带与相应用户设备发 送上行信道信息的频带相同。 本发明实施例提供一种信道资源调度系统, 包括上述的基站。
本实施例中, 基站先对至少一个子帧中下行资源对应的用户设备进行 预调度, 得到预调度的用户设备信息, 在对上行资源调度时参考预调度的 用户设备信息, 并在上行调度后通过上行授权将上行资源信息发送给被调 度的用户设备; 当基站接收到用户设备发送的上行信道信息后, 计算 NF的 下行发射权值; 当预调度的至少一个子帧到来时, 将每个用户设备的下行 频带调度在与相应用户设备发送上行信道信息相同的频带, 按照计算的 NF 的下行发射权值, 将下行资源信息发送给用户设备。 本实施例中通过将用 户设备的下行频带调度在与相应用户设备发送上行信道信息相同的频带, 保证了基站下行发射的信息产生的零陷对准干扰用户设备, 减小小区间的 干扰; 并通过在上行资源调度时参考预调度的用户设备信息, 保证了上下 行被调度的用户设备一致, 从而使得被干扰的用户设备在下行被调度到, 从而提高了 NF抑制干扰的效果。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员 来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的 附图。
图 1是 NF抑制干扰用户设备的结构示意图;
图 2是本发明实施例提供的一种信道资源调度方法的流程图;
图 3是本发明实施例提供的基站中信道传输数据子帧的结构示意图; 图 4是本发明实施例提供的信道资源调度方法与现有方法相比参数增 益的示意图;
图 5是本发明实施例提供的对至少一个子帧中下行资源对应用户设备 信息进行预调度的方法流程图;
图 6是本发明实施例提供的基站中另一种信道传输数据子帧的机构示 意图;
图 7是本发明实施例提供的一种基站的结构示意图;
图 8是本发明实施例提供的另一种基站的结构示意图。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进 行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没 有作出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的 范围。
本发明实施例提供一种信道资源调度方法, 流程图如图 2所示, 本实施 例的方法适用的系统包括两个以上的基站, 且每个基站都是按照本实施例 的方法进行资源调度, 包括:
101 , 对至少一个子帧中下行资源对应的用户设备 ( UE )进行预调度, 得到预调度的用户设备信息;
可以理解, 基站的信道传输数据子帧的配比是固定的, 这里至少一个 子帧是基站接收到被调度用户设备上行数据的子帧之后的任一个或多个有 下行资源的子帧, 且基站接收到上行数据的子帧与这至少一个子帧的约束 关系可以是预置在基站中的, 具体约束关系的内容并不构成对本发明的限 制。
例如, 如图 3所示, 在基站的信道传输数据子帧中, 有些子帧只有上行 ( UL ) 资源, 比如 #n子帧; 有些子帧只有下行(DL ) 资源, 比如 千 帧; 有些子帧是特殊子帧 (SP )既有上行又有下行资源, 比如 #y子帧。 (除 #m、 #n、 #z、 #x和 #之外子帧在图中没有表示出。)基站在 #n子帧接收到用 户设备的上行数据, 则基站可以预调度 #n子帧之后的一个子帧 (比如 #2子 帧)中下行资源对应的用户设备,也可以预调度 #n子帧之后的两个子帧(比 如 #n和 #x子帧) 中下行资源对应的用户设备。
具体预调度的下行资源对应的用户设备信息可以包括: 被调度的用户 设备的标识信息和每个用户设备下行所需的资源数等等, 还可以包括被调 度的用户设备的优先级信息。 这些预调度的用户设备信息可以是基站根据 所覆盖的用户设备的服务质量(Quality of Service, QoS ) (或信道质量信 息)、 业务緩存和业务所需的资源数等信息, 按照预置的算法准则计算得到 的, 这里预置的算法准则可以是本领域技术人员常用的技术手段, 在此不 进行赘述。
其中用户设备的业务緩存应该是用户设备当前的业务緩存, 与当前子 帧到预调度的子帧 (即至少一个子帧)之间该用户设备被调度分配的资源 量相减得到。
102, 根据预调度的用户设备信息调度相应的上行资源, 并将调度的上 行资源信息通过上行授权(UL Grant )发送给被调度的用户设备;
在进行上行资源调度时, 基站可以根据预调度的用户设备信息进行调 度, 比如预调度的用户设备信息中包括被调度的用户设备的标识信息和每 个用户设备下行所需的资源数, 则在上行调度时确定这些被调度的用户设 备在上行信道中的位置 (比如用户设备在上行信道中的哪些频带发送数 据), 且确定每个被调度的用户设备在上行信道中占用的资源数相应地为预 调度的该用户设备下行所需资源数。
当预调度的用户设备信息中不仅包括被调度的用户设备的标识信息和 每个用户设备下行所需的资源数, 还包括这些用户设备的优先级, 则在上 行调度时, 需要根据优先级确定这些用户设备上行资源分配的优先级。
在上行调度完之后, 将调度的上行资源信息通过上行授权相应地发送 给被调度的用户设备。
103 , 当基站接收到用户设备根据上行授权发送的上行信道信息, 根据 上行信道信息计算得到 NF的下行发射权值;
可以理解, 当用户设备接收到上行授权后, 会按照基站授权的上行资 源信息, 将上行信道信息发送给基站。 基站接收的上行信道信息中除了该 基站调度的用户设备的信息外, 还有其他一些干扰用户设备的上行信道信 息, 基站则根据这些上行信道信息, 及上述的 NF权值计算公式 (1 )计算 NF的下行发射权值。
例如, 参考图 3所示, 4艮设基站通过步骤 102的上行调度后, 在 #m子帧 发送上行授权给被调度的用户设备; 当基站在 #n子帧接收到用户设备发送 的上行信道信息, 比如在上行信道信息中可以包括解调参考信号 ( Demodulation Reference Symbol , DMRS ) , 还可以包括探测参考信息 ( Sounding Reference Symbol, SRS )等信息; 当基站在 #n子帧接收到上行 信道信息后, 根据公式(1 )计算得到 NF的下行发射权值。
104 , 根据预调度的用户设备信息和调度的上行资源信息调度下行资 源, 并在至少一个子帧按照 NF的下行发射权值, 将调度的下行资源信息发 送给用户设备; 其中下行资源信息中每个被调度的用户设备的下行频带与 相应用户设备发送上行信道信息的频带相同。
在步骤 101中预调度的子帧到来时, 基站在进行下行资源的调度时, 需 要将用户设备接收下行信道信息的资源频带调度在相应用户设备发送上行 信道信息的频带上, 并按照步骤 103中计算的下行发射权值发送本步骤中调 度的下行资源信息给用户设备。 这样保证了基站发射的下行信道信息中产 生的零陷对准干扰用户设备, 能减小小区间的干扰。
例如, 参考图 3所示, 4叚设基站在预调度时对 #∑子帧中下行资源对应的 用户设备进行预调度, 则当 #n子帧接收到用户设备的上行信道信息后, 计 算了 NF的发射权值, 在#2子帧到来时, 基站按照 NF的发射权值发送下行资 源信息给用户设备。
需要说明的是, 由于基站在步骤 103中接收的上行信道信息中包含了其 他干扰用户设备的上行信道信息, 说明其他基站在上行调度了这些干扰用 户设备, 而其他基站的上行调度是参考了预调度的下行资源对应的用户设 备信息, 则在其他基站的下行一定会调度到这些干扰用户设备, 很好地改 善了 NF抑制干扰的效果。
可见, 本实施例中, 基站先对至少一个子帧中下行资源对应的用户设 备进行预调度, 得到预调度的用户设备信息, 在对上行资源进行调度时参 考预调度的用户设备信息, 并将调度的上行资源信息通过上行授权发送给 被调度的用户设备; 当接收到用户设备发送的上行信道信息后, 计算 NF的 下行发射权值; 当预调度的至少一个子帧到来时, 将每个用户设备的下行 频带调度在与相应用户设备发送上行信道信息相同的频带, 按照计算的 NF 的下行发射权值, 将下行资源信息发送给用户设备。 本实施例中通过将每 个用户设备的下行频带调度在与相应用户设备发送上行信道信息相同的频 带, 保证了基站下行发射的信息产生的零陷对准干扰用户设备, 减小小区 间的干扰; 并通过在上行调度时参考预调度的用户设备信息, 保证了上下 行被调度的用户设备一致, 从而使得被干扰的用户设备在下行被调度到, 从而提高了 NF抑制干扰的效果。
参考图 4所示, 为釆用本发明实施例的信道资源调度方法与釆用现有的 方法相比, 本发明实施例中的小区平均吞吐率的增益为 11.1%, 而边缘用户 吞吐率的增益为 58.2% , 可见本发明实施例的方法能很好地改善了现有 NF 抑制干扰的效果。 参考图 5所示, 在一个具体的实施例中, 基站在执行上述步骤 101中的 预调度并得到预调度的用户设备信息时, 可以按照如下的步骤来实现:
A:根据基站所覆盖的用户设备的服务质量或信道质量信息计算覆盖的 用户设备的优先级;
在计算优先级时可以有多种计算方法,以下以为公平公正( Proportional Fair )调度算法和最大载干比 (MAX C/I )调度算法例说明:
对于直公平公正调度算法, 是按照如下的优先权公式(2 )计算得到用 户设备的优先级值:
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Priority i = r^ ( 2 )
其中, - W是在 t 时刻, 用户设备所处位置所支持的最大传输速率, 是 根据用户设备的 QoS参数得到; W表示用户设备在前面一段时间实际所 得到的调度速率。
对于最大载干比调度算法, 直接将每个传输时间间隔 ( Transmission Time Interval , ΤΉ ) 内接收到的用户设备报告中信道质量指示( CQI )进行 排序, 得到用户设备的优先级。
Β、 根据覆盖的用户设备的业务緩存和业务所需的资源数, 确定被调度 的用户设备的标识信息和下行所需资源数; 其中业务緩存是覆盖的用户设 备当前的业务緩存, 与当前子帧到所述至少一个子帧之间覆盖的用户设备 被调度分配的资源量相减得到。
用户设备中每个业务所需要满足的速率不同, 则所需的资源数也不同: 比如对于 LTE业务中的保证比特速率 ( GBR )业务需要达到一定的保证比特 速率才能正常运行, 此时需要 a个资源数; 而 LTE业务中的非保证比特速率 ( Non- GBR ) 业务只需要保证不超过聚集最大比特速率 ( AMBR ) 即可, 此时只需 b个资源数。
但是用户设备的业务緩存会约束为该用户设备分配的资源数, 如果用 户设备的业务緩存比该用户设备业务所需资源数少, 则为该用户设备预调 度的下行所需资源数与业务緩存相同, 比如用户设备的业务緩存为 10个资 源数, 而该用户设备业务所需资源数为 12, 则为该用户设备预调度 10个资 源数。
可以理解, 在步骤 B中确定的被调度的用户设备可以是步骤 A中计算的 优先级中所有的用户设备, 也可以是其中的部分用户设备。 在另一个具体的实施例中, 对于有些业务数据在上下行的信道上不对 称, 比如上下行所需的资源数不同等, 在执行步骤 102中的上行调度时, 需 要先根据被调度的用户设备的信息, 比如当前的业务緩存和业务所需的资 源数等信息, 计算得到被调度的用户设备上行所需的资源数; 然后将计算 得到的上行所需资源数与预调度的下行所需资源数进行比较, 如果小于, 则需要确定相应用户设备的上行码率 (即上行发送信息的速率)或上行填 充(padding )信息使得上行实际所需资源数与预调度的下行所需资源数相 等, 这就要求降低预调度的用户设备的下行码率来提升该用户设备分配的 上行资源数; 或通过填充信息来提升该用户设备分配的上行资源数。
其中,基站在计算用户设备上行所需的资源数时的方法与在上述步骤 B 中确定下行所需资源数的方法类似, 只是其中使用一个参数不同, 即在计 算上行所需资源数时使用用户设备当前的业务緩存。
对于计算得到的用户设备的上行所需资源数大于预调度的下行所需资 源数时, 在步骤 102的上行资源调度时, 为该用户设备调度的上行所需资源 数为计算得到该用户设备上行所需资源数; 且在步骤 104中进行下行资源的 调度时, 为相应用户设备调度的下行所需资源数为计算得到的上行所需资 源数。 在另一个具体的实施例中, 在执行上述步骤 103时, 如果基站在上行子 帧中接收的上行信道信息中包括 DRMS,则根据接收到的上行信道信息中的 DRMS参数进行信道估计得到公式( 1 ) 中的 h, 并根据公式( 1 )计算 NF的 下行发射权值; 则在执行步骤 104的下行资源调度时, 将每个被调度的用户 设备的下行频带调度在相应用户设备上行发送 DMRS的频带上,并可以优先 调度下行信道上与上行接收 DMRS相同的频带,其次再调度下行信道上的其 他频带。 这样由于在接收 DMRS时是支持单用户接收的, 则在计算 NF的下 行发射权值时干扰用户设备的数量就会减少, 更能保证这些干扰用户设备 在下行能被调度到, 从而提升了 NF抑制干扰的效果。
需要说明的是, 如果接收的上行信道信息中有 SRS, 则可以在接收 SRS 的频带上计算 BF的下行发射权值; 则对于业务数据在上下行的信道上不对 称, 比如用户设备下行所需资源数与上行调度信息中的资源数不相同时, 在发送下行资源信息给用户设备时, 会出现在在下行信道上有的频带 (比 如第一频带)上没有对应的 NF下行发射权值, 则基站在这些频带上发送下 行资源信息时, 可以按照计算的 BF的下行发射权值将下行资源信息发送给 用户设备。
以下以一个具体的应用实施例来说明本发明实施例的调度方法, 在本 实施例中基站的信道传输数据子帧的结构如图 6所示, 信道资源调度方法包 括:
1、 基站预先对 #Z子帧中下行资源对应的用户设备进行预调度后; 再根 据预调度的用户设备信息相应地调度上行资源, 并在 #M子帧将调度的上行 资源信息通过上行授权发送给被调度的用户设备; 当基站在 #X子帧接收到 上行信道信息, 根据上行信道信息计算 NF的下行发射权值; 最后基站根据 预调度的用户设备信息、 调度的上行资源信息调度下行资源, 并在 #Z子帧 按照计算的下行发射权值, 将下行资源信息发送给用户设备。 其中每个被 调度的用户设备的下行频带与相应用户设备发送上行信道信息的频带相 同。
2、基站预先对 #\^和#0子帧中下行资源对应的用户设备进行预调度后; 再根据预调度的用户设备信息相应地调度上行资源, 并在 #N子帧将调度的 上行资源信息通过上行授权发送给被调度的用户设备; 当基站在#丫子帧接 收到上行信道信息, 根据上行信道信息计算 NF的下行发射权值; 最后基站 根据预调度的用户设备信息、 调度的上行资源信息调度下行资源, 并在 #W 和#0子帧按照计算的下行发射权值, 将下行资源信息发送给用户设备。 其 中每个被调度的用户设备的下行频带与相应用户设备发送上行信道信息的 频带相同。
需要说明的是, 为了保证当基站在接收到用户设备的上行信道信息后, 有足够的时间来计算 NF的下行发射权值, 则基站接收上行信道信息对应子 帧与发送下行资源信息的子帧之间需要相隔预置的子帧数, 这就需要基站 预调度的子帧是: 基站接收上行信道信息对应子帧加上预置的子帧数之后 的任一个或多个有下行资源的子帧。 本发明实施例提供一种基站, 结构示意图如图 7所示, 包括:
预调度单元 10 , 用于对至少一个子帧中下行资源对应的用户设备进行 预调度, 得到预调度的用户设备信息;
上行调度单元 20, 用于根据预调度单元 10得到的预调度的用户设备信 息调度相应的上行资源, 并将调度的上行资源信息通过上行授权发送给被 调度的用户设备;
如果预调度的用户设备信息包括用户设备的标识信息和每个用户设备 下行所需的资源数, 则上行调度单元 20在进行上行调度时, 可以确定这些 被调度的用户设备在上行信道中的位置信息, 且确定被调度的用户设备在 上行信道中占用的资源数为相应用户设备下行所需资源数;
如果当预调度的用户设备信息中还包括被调度的用户设备的优先级, 则上行调度单元 20还可以根据被调度的用户设备的优先级确定用户设备上 行资源分配的优先级。
权值计算单元 30, 用于当接收到用户设备根据上行授权发送的上行信 道信息, 根据上行信道信息计算得到零陷赋形 NF的下行发射权值;
下行调度单元 40, 用于根据预调度单元 10预调度的用户设备信息和上 行调度单元 20调度的上行资源信息调度下行资源, 并在至少一个子帧按照 权值计算单元 30计算的 NF的下行发射权值, 将调度的下行资源信息发送给 用户设备; 其中下行资源信息中每个被调度的用户设备的下行频带与相应 用户设备发送上行信道信息的频带相同。
这里至少一个子帧可以为: 基站接收到上行信道信息对应的子帧加上 预置的子帧数之后的任一个或多个有下行资源的子帧。
且如果权值计算单元 30接收的上行信道信息中包括解调参考信号 DMRS, 下行调度单元 40在调度下行资源时,是将每个被调度的用户设备的 下行频带调度在相应用户设备上行接收 DMRS的频带上。
本实施例中的基站中, 预调度单元 10先对至少一个子帧中下行资源对 应用户设备进行预调度, 得到预调度的用户设备信息, 当上行调度单元 20 在对上行资源进行调度时参考预调度的用户设备信息, 并将调度的上行资 源信息通过上行授权发送给被调度的用户设备; 当权值计算单元 30接收到 用户设备发送的上行信道信息后, 计算 NF的下行发射权值; 最后当预调度 的至少一个子帧到来时, 由下行调度单元 40将每个被调度的用户设备的下 行频带调度在相应用户设备发送上行信道信息相同的频带, 按照计算的 NF 的下行发射权值, 将下行资源信息发送给用户设备。 本实施例中的基站是 通过将用户设备的下行频带调度在与相应用户设备发送上行信道信息相同 的频带, 保证了基站下行发射的信息产生的零陷对准干扰用户设备, 减小 小区间的干扰; 并通过在上行资源调度时参考预调度的用户设备信息, 保 证了上下行被调度的用户设备一致, 从而使得被干扰的用户设备在下行被 调度到, 从而提高了 NF抑制干扰的效果。
参考图 8所示, 在一个具体的实施例中, 本实施例的基站中预调度单元 10可以通过优先级计算单元 110和下行资源确定单元 210实现, 而上行调度 单元 20可以通过上行资源计算单元 201、 上行确定单元 202和资源数确定单 元 203实现, 其中:
优先级计算单元 110 , 用于根据基站所覆盖的用户设备的服务质量或信 道质量信息计算覆盖的用户设备的优先级;
下行资源确定单元 210, 用于根据覆盖的用户设备的业务緩存和业务所 需的资源数, 确定被调度的用户设备的标识信息和下行所需资源数; 业务 緩存是覆盖的用户设备当前的业务緩存, 与当前子帧到所述至少一个子帧 之间覆盖的用户设备被调度分配的资源量相减得到;
上行资源计算单元 201 , 用于根据被调度的用户设备当前的业务緩存和 业务所需的资源数, 计算得到被调度的用户设备的上行所需资源数;
上行确定单元 202 , 用于当上行资源计算单元 201计算的上行所需资源 数小于预调度的下行所需资源数, 则确定相应用户设备的上行码率或上行 填充信息使得上行实际所需资源数与下行所需资源数相等;
资源数确定单元 203 , 用于当上行资源计算单元 201计算的上行所需资 源数大于预调度的下行所需资源数, 则为相应用户设备调度的上行所需资 源数为计算得到的上行所需资源数;
且下行调度单元 40在调度下行资源时, 为相应用户设备调度的下行所 需资源数为计算得到的上行所需资源数。
在本实施例中, 在预调度时通过优先级计算单元 110计算了基站覆盖的 用户设备的优先级, 并由下行资源确定单元 210获得这些用户设备中被调度 的用户设备的标识信息和下行所需资源数;
则在进行上行资源调度时, 由上行资源计算单元 201计算了上行所需资 源数, 当上行所需资源数大于预调度的下行所需资源数, 则由资源数确定 单元 203确定上行资源数为上行资源计算单元 201计算的资源数; 当上行所 需资源数小于预调度的下行所需资源数, 则上行确定单元 202根据上行所需 资源数来确定上行码率或上行填充信息, 使得上行实际所需资源数与下行 资源确定单元 210确定的资源数相同; 最后由上行调度单元 20将上行资源信 息 (包括资源数确定单元 203确定的上行所需资源数; 或上行确定单元 202 确定的上行码率或上行填充信息)通过上行授权发送给被调度的用户设备; 当权值计算单元 30接收到上行信道信息后, 计算 NF的下行发射权值; 下行调度单元 40会根据下行资源确定单元 210确定的用户设备信息、 及上行 调度单元 20调度的上行资源信息(包括资源数确定单元 203确定的上行所需 源, 并发送给用户设备。
且在另一个具体的实施例中, 本实施例的基站还可以包括波束权值计 算单元 50 , 用于当权值计算单元 30接收的上行信道信息包括探测参考信息 SRS, 根据 SRS计算 BF的下行发射权值;
则下行调度单元 40还用于, 当下行信道的第一频带上没有对应的 NF下 行发射权值, 则在第一频带上按照波束权值计算单元计算的 BF的下行发射 权值, 将下行资源信息发送给用户设备。
在本实施例的基站中,如果接收的上行信道信息中有 SRS, 则波束权值 计算单元 50可以在接收 SRS的频带上计算 BF的下行发射权值; 则对于业务 数据对于在上下行的信道上不对称, 比如用户设备下行所需资源数与上行 调度信息中的资源数不相同时, 在发送下行资源信息给用户设备时, 会出 现在在下行信道上有的频带 (比如第一频带)上没有对应的 NF下行发射权 值, 则基站在这些频带上发送下行资源信息时, 可以按照计算的 BF的下行 发射权值将下行资源信息发送给用户设备。
本发明实施例还提供一种信道资源调度系统, 包括的基站的结构如图 7 或 8所示。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分 步骤是可以通过程序来指令相关的硬件来完成, 该程序可以存储于一计算 机可读存储介质中, 存储介质可以包括: 只读存储器(ROM )、 随机存取存 储器(RAM )、 磁盘或光盘等。
以上对本发明实施例所提供的信道资源调度方法、 系统及基站, 进行 述, 以上实施例的说明只是用于帮助理解本发明的方法及其核心思想; 同 时, 对于本领域的一般技术人员, 依据本发明的思想, 在具体实施方式及 应用范围上均会有改变之处, 综上所述, 本说明书内容不应理解为对本发 明的限制。

Claims

权利要求
1、 一种信道资源调度方法, 其特征在于, 包括:
对至少一个子帧中下行资源对应的用户设备进行预调度, 得到预调度 的用户设备信息;
根据所述预调度的用户设备信息调度相应的上行资源, 并将所述调度 的上行资源信息通过上行授权发送给被调度的用户设备;
当接收到所述用户设备根据所述上行授权发送的上行信道信息, 根据 所述上行信道信息计算得到零陷赋形 NF的下行发射权值;
根据所述预调度的用户设备信息和所述上行资源信息调度下行资源, 并在所述至少一个子帧按照所述 NF的下行发射权值, 将所述调度的下行资 源信息发送给所述用户设备; 其中所述下行资源信息中每个被调度的用户 设备的下行频带与相应用户设备发送所述上行信道信息的频带相同。
2、 如权利要求 1所述的方法, 其特征在于, 所述对至少一个子帧中下 行资源对应的用户设备进行预调度, 得到预调度的用户设备信息具体包括: 根据基站所覆盖的用户设备的服务质量或信道质量信息计算所述覆盖 的用户设备的优先级;
根据所述覆盖的用户设备的业务緩存和业务所需的资源数, 确定被调 度的用户设备的标识信息和下行所需资源数; 所述业务緩存是所述覆盖的 用户设备当前的业务緩存, 与当前子帧到所述至少一个子帧之间所述覆盖 的用户设备被调度分配的资源量相减得到。
3、 如权利要求 1或 2所述的方法, 其特征在于, 所述至少一个子帧为: 基站接收到所述上行信道信息对应子帧加上预置的子帧数之后的任一个或 多个有下行资源的子帧。
4、如权利要求 1-3中任一项所述的方法, 其特征在于, 所述根据所述预 调度的用户设备信息调度相应的上行资源具体包括:
确定所述被调度的用户设备在上行信道中的位置信息, 且确定所述被 调度的用户设备在所述上行信道中占用的资源数为相应用户设备下行所需 资源数。
5、 如权利要求 4所述的方法, 其特征在于, 当所述预调度的用户设备 信息中包括所述被调度的用户设备的优先级, 则所述根据所述预调度的用 户设备信息调度相应的上行资源还包括:
根据所述被调度的用户设备的优先级确定所述用户设备上行资源分配 的优先级。
6、如权利要求 1-3中任一项所述的方法, 其特征在于, 所述根据所述预 调度的用户设备信息调度相应的上行资源具体包括:
根据所述被调度的用户设备当前的业务緩存和业务所需的资源数, 计 算得到所述被调度的用户设备的上行所需资源数;
当所述上行所需资源数小于预调度的下行所需资源数, 则确定相应用 户设备的上行码率或上行填充信息使得上行实际所需资源数与下行所需资 源数相等;
当所述上行所需资源数大于预调度的下行所需资源数, 则为相应用户 设备调度的上行所需资源数为所述计算得到的上行所需资源数; 且在所述 调度下行资源信息时, 为相应用户设备调度的下行所需资源数为所述计算 得到的上行所需资源数。
7、如权利要求 1-6中任一项所述的方法, 其特征在于, 所述接收的上行 信道信息包括解调参考信号 DMRS, 则所述调度下行资源具体包括:
将每个被调度的用户设备的下行频带调度在相应用户设备上行发送所 述 DMRS的频带上。
8、 如权利要求 7所述的方法, 其特征在于, 当所述上行信道信息还包 括: 探测参考信息 SRS, 则所述方法还包括: 根据所述 SRS计算 BF的下行发 射权值;
当下行信道的第一频带上没有对应的 NF下行发射权值, 则在所述第一 频带上按照所述 BF的下行发射权值,将所述下行资源信息发送给用户设备。
9、 一种基站, 其特征在于, 包括:
预调度单元, 用于对至少一个子帧中下行资源对应的用户设备进行预 调度, 得到预调度的用户设备信息;
上行调度单元, 用于根据所述预调度单元预调度的用户设备信息调度 相应的上行资源, 并将所述调度的上行资源信息通过上行授权发送给被调 度的用户设备;
权值计算单元, 用于当接收到所述用户设备根据所述上行授权发送的 上行信道信息, 根据所述上行信道信息计算得到零陷赋形 NF的下行发射权 值;
下行调度单元, 用于根据所述预调度单元预调度的用户设备信息和上 行调度单元调度的上行资源信息调度下行资源, 并在所述至少一个子帧按 照所述权值计算单元计算的 NF的下行发射权值, 将所述调度的下行资源信 息发送给所述用户设备; 其中所述下行资源信息中每个被调度的用户设备 的下行频带与相应用户设备发送所述上行信道信息的频带相同。
10、如权利要求 9所述的基站,其特征在于, 所述预调度单元具体包括: 优先级计算单元, 用于根据基站所覆盖的用户设备的服务质量或信道 质量信息计算所述覆盖的用户设备的优先级;
下行资源确定单元, 用于根据所述覆盖的用户设备的业务緩存和业务 所需的资源数, 确定被调度的用户设备的标识信息和下行所需资源数; 所 述业务緩存是所述覆盖的用户设备当前的业务緩存, 与当前子帧到所述至 少一个子帧之间所述覆盖的用户设备被调度分配的资源量相减得到。
11、 如权利要求 9或 10所述的基站, 其特征在于, 所述上行调度单元具 体包括:
上行资源计算单元, 用于根据所述被调度的用户设备当前的业务緩存 和业务所需的资源数, 计算得到所述被调度的用户设备的上行所需资源数; 上行确定单元, 用于当所述上行资源计算单元计算的上行所需资源数 小于预调度的下行所需资源数, 则确定相应用户设备的上行码率或上行填 充信息使得上行实际所需资源数与下行所需资源数相等。
12、 如权利要求 11所述的基站, 其特征在于, 所述上行调度单元还包 括:
资源数确定单元, 用于当所述上行资源计算单元计算的上行所需资源 数大于预调度的下行所需资源数, 则为相应用户设备调度的上行所需资源 数为所述计算得到的上行所需资源数;
且所述下行调度单元在调度下行资源时, 为相应用户设备调度的下行 所需资源数为所述计算得到的上行所需资源数。
13、 如权利要求 9所述的基站, 其特征在于, 还包括:
波束权值计算单元, 用于当所述权值计算单元接收的上行信道信息包 括探测参考信息 SRS , 根据所述 SRS计算 BF的下行发射权值;
则所述下行调度单元还用于, 当下行信道的第一频带上没有对应的 NF 下行发射权值, 则在所述第一频带上按照所述波束权值计算单元计算的 BF 的下行发射权值, 将所述下行资源信息发送给用户设备。
14、 一种信道资源调度系统, 其特征在于, 包括如权利要求 9到 13任 一项所述的基站。
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