WO2016197673A1 - 一种载波聚合场景下的成员载波调度方法及装置 - Google Patents
一种载波聚合场景下的成员载波调度方法及装置 Download PDFInfo
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- WO2016197673A1 WO2016197673A1 PCT/CN2016/077883 CN2016077883W WO2016197673A1 WO 2016197673 A1 WO2016197673 A1 WO 2016197673A1 CN 2016077883 W CN2016077883 W CN 2016077883W WO 2016197673 A1 WO2016197673 A1 WO 2016197673A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
Definitions
- the present application relates to the field of communications technologies, and in particular, to a component carrier scheduling method and apparatus in a carrier aggregation scenario.
- a serving cell is a cell that provides a data transmission service for a user equipment (UE), and each UE has at most one serving cell.
- UE user equipment
- CA Carrier Aggregation
- the UE can have multiple serving cells at the same time, that is, the system aggregates two or more available carriers to form a larger transmission bandwidth.
- the UE is provided with a better service experience. Therefore, the cells serving the UE are classified into two types: a PCell (Primary Cell) and an SCell (Secondary Cell), where the PCell corresponds to a PCC (Primary Component Carrier), SCell.
- PCell Primary Cell
- SCell Secondary Cell
- the PCell inherits the nature of the serving cell in the LTE system, and the SCell is only used as an additional resource to carry the function of data transmission. Both PCell and SCell are from the perspective of the UE.
- the PCell establishes an RRC-connected serving cell for the UE, and the establishment process is identical to that of the LTE system.
- the SCell is configured by the RRC layer of the base station.
- the base station performs the SCell configuration on the UE according to actual requirements.
- the SCell configuration includes the addition of the SCell, the deletion of the SCell, and the modification of the SCell, which are completed by the RRC reconfiguration process.
- the existing aggregation carrier scheduling method is to schedule multiple aggregated carriers as one entity, that is, when the scheduling subframe arrives, each aggregate carrier is scheduled in sequence, and the carrier is first selected as the UE of the PCell.
- the scheduling is performed to ensure resource allocation of the resource requirements of the basic QoS (Quality of Service) of the UE.
- each aggregated carrier is scheduled again, and the UE that selects the carrier as the SCell is scheduled to perform scheduling, and the remaining resources are required to be allocated in the aggregated carrier, and the data to be scheduled remains in the cache of the UE to be scheduled.
- the UE to be scheduled data allocates the remaining resources of the aggregated carrier, and at this time is a scheduling for resource allocation that maximizes the UE data transmission requirement.
- the prior art aggregate carrier scheduling method is a serial multi-round scheduling method.
- at least two rounds of scheduling are required to complete the resource allocation of the aggregated carrier, and on the other hand, the serial scheduling.
- Way request product The hardware processing capability is higher when implemented, otherwise it is not possible to schedule and process more UEs.
- the embodiment of the present invention provides a component carrier scheduling method and device in a carrier aggregation scenario, which is used to implement parallel scheduling of component carriers, thereby achieving faster scheduling, lower implementation complexity, and lower hardware processing capability requirements.
- the quantity allocation ratio coefficient determines the amount of data to be transmitted that is to be scheduled to be carried on the component carrier.
- the to-be-scheduled bearer list of the user equipment UE to be scheduled on the component carrier is determined, and for each bearer to be scheduled, according to the Determining the amount of buffered data to be scheduled and the proportion of the data to be transmitted on the component carrier, determining the amount of data to be transmitted on the component carrier to be scheduled, thereby enabling parallel scheduling of component carriers and achieving faster scheduling
- the utility model has the advantages of lower complexity and lower requirements on the hardware processing capability of the product.
- each of the to-be-transmitted data volume allocation ratio coefficients to be scheduled to be carried on any component carrier is periodically updated according to the first period. Therefore, the determined amount of data to be transmitted on the component carrier to be scheduled is more reasonable, and the scheduling of the component carrier is more accurate, which is consistent with the actual situation.
- each of the to-be-transmitted data volume allocation ratio coefficients to be scheduled to be carried on any component carrier is periodically updated as follows:
- the distribution scale factor is periodically updated.
- the statistics of the statistic of the to-be-scheduled bearer on each component carrier are periodically collected according to the second period to obtain a statistical result:
- the average transmission rate or the smoothed average transmission rate of the to-be-scheduled bearer on the component carrier is used as a statistical result of the to-be-scheduled bearer on the component carrier.
- the statistics of the statistic of the to-be-scheduled bearer on each component carrier are periodically collected according to the second period to obtain a statistical result:
- the spectrum efficiency of the cell to be scheduled to be carried in the corresponding cell of the component carrier or the smoothed spectrum efficiency is used as the statistical result of the to-be-scheduled bearer on the component carrier.
- the spectrum efficiency of the to-be-scheduled bearer in the corresponding cell of each component carrier is calculated according to the second period, including:
- the total transmission data amount of the to-be-scheduled bearer on each component carrier is counted, and the to-be-scheduled bearer is determined on each component carrier according to the total transmission data amount of the to-be-scheduled bearer on each component carrier.
- the method further includes: collecting, according to the second period, the total number of physical resource blocks PRB occupied by the UE in the corresponding cell of each component carrier for each UE that needs to be scheduled;
- any to-be-scheduled bearer i the following formula is used to determine the actual number of PRBs of the to-be-scheduled bearer i in the cell corresponding to any component carrier CCq:
- the N CCq_bearer i (n) represents the actual number of PRBs of the cell to be scheduled i to be in the cell corresponding to the component carrier CCq in the nth second period of the most recent statistics
- N CCq_UEj (n) indicates the most recent statistics.
- the number of PRBs occupied by any of the UEs that need to be scheduled in the nth second period is the total number of PRBs in the cell corresponding to the component carrier CCq
- the D CCq_bearing i (n) is expressed in the nth second period of the last statistics.
- N CCq_UEj_bearer_NUM indicates the number of bearers that the UEj participates in scheduled transmission in the CCq in the nth second period of the most recent statistics, where i, j, Both n and q are arbitrary natural numbers.
- each of the to-be-scheduled bearers that belong to the same UE, in any of the first periods, have the same distribution ratio of data to be transmitted on the same component carrier.
- each bearer to be scheduled in the same cell belongs to the same member in any of the first periods.
- the data distribution ratio of the data to be transmitted on the carrier is the same.
- a first unit configured to determine that a component carrier in a carrier aggregation scenario needs to be scheduled
- a second unit configured to determine, for each component carrier, a to-be-scheduled bearer list of the user equipment UE to be scheduled on the component carrier, and, for each to-be-scheduled bearer, according to the cache data amount of the to-be-scheduled bearer and the member
- the amount of data to be transmitted on the carrier is allocated a proportional coefficient, and the amount of data to be transmitted that is to be scheduled to be carried on the component carrier is determined.
- the second unit is further configured to: periodically update, according to the first period, a data distribution ratio coefficient to be transmitted that is to be transmitted on any component carrier.
- the second unit periodically updates the proportion of data to be transmitted of each to-be-scheduled bearer on any component carrier according to the following manner:
- the distribution scale factor is periodically updated.
- the second unit performs periodic statistics on the statistics of the to-be-scheduled bearer on each component carrier according to the second period for each to-be-scheduled bearer to obtain a statistical result:
- the average transmission rate or the smoothed average transmission rate of the to-be-scheduled bearer on the component carrier is used as a statistical result of the to-be-scheduled bearer on the component carrier.
- the second unit performs periodic statistics on the statistics of the to-be-scheduled bearer on each component carrier according to the second period for each to-be-scheduled bearer to obtain a statistical result:
- the spectrum efficiency of the cell to be scheduled to be carried in the corresponding cell of the component carrier or the smoothed spectrum efficiency is used as the statistical result of the to-be-scheduled bearer on the component carrier.
- the second unit is used to calculate the spectrum efficiency of the to-be-scheduled bearer in the corresponding cell of each component carrier according to the second period, where the second unit is specifically configured to:
- the total transmission data amount of the to-be-scheduled bearer on each component carrier is counted, and the to-be-scheduled bearer is determined on each component carrier according to the total transmission data amount of the to-be-scheduled bearer on each component carrier.
- Data transmission Transmission rate is counted, and the to-be-scheduled bearer is determined on each component carrier according to the total transmission data amount of the to-be-scheduled bearer on each component carrier.
- the second unit is further configured to: according to the second period, collect, for each UE that needs to be scheduled, a total number of physical resource blocks PRB occupied by the UE in each component carrier;
- the second unit determines, for any to-be-scheduled bearer i, the number of PRBs actually occupied by the to-be-scheduled bearer i in any component carrier CCq:
- the N CCq_bearer i (n) represents the actual number of PRBs of the cell to be scheduled i to be in the cell corresponding to the component carrier CCq in the nth second period of the most recent statistics
- N CCq_UEj (n) indicates the most recent statistics.
- the number of PRBs occupied by any of the UEs that need to be scheduled in the nth second period is the total number of PRBs in the cell corresponding to the component carrier CCq
- the D CCq_bearing i (n) is expressed in the nth second period of the last statistics.
- N CCq_UEj_bearer_NUM indicates the number of bearers that the UEj participates in scheduled transmission in the CCq in the nth second period of the most recent statistics, where i, j, Both n and q are arbitrary natural numbers.
- each of the to-be-scheduled bearers that belong to the same UE, in any of the first periods, have the same distribution ratio of data to be transmitted on the same component carrier.
- each of the to-be-scheduled bearers in a cell belongs to the same, and the proportion of the data to be transmitted on the same component carrier is the same in any of the first periods.
- FIG. 1 is a schematic diagram of parallel scheduling of component carriers in the case of carrier aggregation according to an embodiment of the present disclosure
- FIG. 2 is a schematic flowchart of a method for scheduling a component carrier in a carrier aggregation scenario according to an embodiment of the present disclosure
- FIG. 3 is a schematic structural diagram of a component carrier scheduling apparatus in a carrier aggregation scenario according to an embodiment of the present disclosure
- FIG. 4 is a schematic structural diagram of a component carrier scheduling apparatus in another carrier aggregation scenario according to an embodiment of the present disclosure.
- the embodiment of the present application provides a component carrier scheduling method and device in a carrier aggregation scenario, which are used to implement members.
- Parallel scheduling of carriers enables faster scheduling, lower implementation complexity, and lower requirements for product hardware processing capabilities.
- multiple aggregations are implemented by pre-allocating data to be transmitted on each of the aggregated carriers (that is, each of the plurality of aggregated carriers, also referred to as component carriers) when multiple carriers are aggregated.
- Carrier parallel scheduling resource allocation of multiple aggregated carriers is completed at the same time. This method can effectively reduce the hardware processing capability of multi-carrier aggregation scheduling in product implementation. On the basis of ensuring system performance, the resource allocation and scheduling of multiple aggregate carriers can be completed more quickly, and the carrier can be quickly adjusted. The purpose of the resource.
- the technical solution proposed in the embodiment of the present application determines, in the scheduling subframe time, the LCG (Logical Channel Group) and/or the downlink RB (Radio Bearer) to be scheduled bearer of the UE to be scheduled.
- each of the aggregated carrier CCs is determined in a scheduling component (Component Carrier) selection module, and a bearer list of the UE that needs to be scheduled in the current scheduling is determined, and a specific list of the bearers is finally determined.
- a method for scheduling a component carrier in a carrier aggregation scenario includes:
- For each component carrier determine a to-be-scheduled bearer list of the user equipment UE to be scheduled on the component carrier, and, for each to-be-scheduled bearer, according to the buffered data volume of the to-be-scheduled bearer and the to-be-served on the component carrier
- the transmission data quantity allocation proportional coefficient determines the amount of data to be transmitted that is to be scheduled to be carried on the component carrier.
- the to-be-scheduled bearer in the embodiment of the present application refers to the uplink logical channel group to be scheduled in the uplink direction and the downlink radio bearer to be scheduled in the downlink direction.
- the to-be-scheduled bearer list of the user equipment UE to be scheduled on the component carrier is determined, and for each bearer to be scheduled, according to the Determining the amount of buffered data to be scheduled and the proportion of the data to be transmitted on the component carrier, determining the amount of data to be transmitted on the component carrier to be scheduled, thereby enabling parallel scheduling of component carriers and achieving faster scheduling
- the utility model has the advantages of lower complexity and lower requirements on the hardware processing capability of the product.
- each of the to-be-transmitted data volume allocation ratio coefficients to be scheduled to be carried on any component carrier is periodically updated according to the first period (which may also be referred to as an update period).
- the first period which may also be referred to as an update period.
- the proportion of the data to be transmitted on each component carrier to be scheduled to be scheduled the determined amount of data to be transmitted on the component carrier is more reasonable, and the scheduling of the component carrier is more reasonable. Accurate and consistent with actual changes.
- each of the to-be-transmitted data to be transmitted on any component carrier is allocated a proportional coefficient, as follows Ways to periodically update:
- the proportion of the data to be transmitted on the component carrier is periodically updated.
- the statistic may be multiple, for example, the average transmission rate to be scheduled to be carried on the component carrier, or the spectrum efficiency of the cell to be scheduled to be carried in the component carrier.
- the statistics of the statistic of the to-be-scheduled bearer on each component carrier are periodically collected according to the second period to obtain a statistical result:
- the average transmission rate or the smoothed average transmission rate of the to-be-scheduled bearer on the component carrier is used as a statistical result of the to-be-scheduled bearer on the component carrier.
- any statistic may be smoothed, and the statistic obtained after the smoothing process is subsequently processed accordingly.
- the statistics of the statistic of the to-be-scheduled bearer on each component carrier are periodically collected according to the second period to obtain a statistical result:
- the spectrum efficiency of the cell to be scheduled to be carried in the corresponding cell of the component carrier or the smoothed spectrum efficiency is used as the statistical result of the to-be-scheduled bearer on the component carrier.
- the spectrum efficiency of the to-be-scheduled bearer in the corresponding cell of each component carrier is calculated according to the second period, including:
- the total transmission data amount of the to-be-scheduled bearer on each component carrier is counted, and the to-be-scheduled bearer is determined on each component carrier according to the total transmission data amount of the to-be-scheduled bearer on each component carrier.
- the method further includes: collecting, according to the second period, the total number of physical resource blocks PRB occupied by the UE in the corresponding cell of each component carrier for each UE that needs to be scheduled;
- any to-be-scheduled bearer i the following formula is used to determine the actual number of PRBs of the to-be-scheduled bearer i in the cell corresponding to any component carrier CCq:
- the N CCq_bearer i (n) represents the actual number of PRBs of the cell to be scheduled i to be in the cell corresponding to the component carrier CCq in the nth second period of the most recent statistics, and N CCq_UEj (n) indicates the most recent statistics.
- the total number of PRBs occupied by the UEj in the nth second period that needs to be scheduled in the component carrier CCq, and the D CCq_bearing i (n) indicates that it is to be scheduled in the nth second period of the most recent statistics.
- N CCq_UEj_bearer_NUM indicates the number of bearers that the UEj participates in the scheduled transmission in the CCq in the nth second period of the most recent statistics, where i, j, n, q is an arbitrary natural number.
- the proportion of the data to be transmitted on the same component carrier is the same in any first period.
- the proportion of the data to be transmitted on the same component carrier is the same in any first period.
- the period lengths of the first period and the second period in the embodiment of the present application may be the same or different.
- the specific cycle length can be determined according to actual needs.
- the following describes the detailed method in the specific implementation steps, and describes the two aggregation carriers and the uplink scheduling (the same is true for more aggregate carriers and downlink scheduling).
- the specific methods include two types, one is based on the transmission capability of each aggregated carrier for parallel scheduling, and the other is based on the equal load of each aggregated carrier for parallel scheduling, and two simplified methods are proposed. It is assumed that the two carriers are aggregated as CC1 and CC2, respectively.
- Method 1 Parallel scheduling based on the transmission capabilities of each aggregated carrier.
- the specific process includes:
- Step 1 Perform statistics according to the preset statistical period to obtain statistics.
- T statistic (in ms)
- n the nth statistical period
- T statistic the statistics that need to be statistically calculated in the t-th statistical period time T statistic
- the total transmission data amount D cc1_LCGi (n) of any uplink LCG i of each UE to be scheduled on CC1 and the total transmission data amount D cc2_LCGi (n) on CC2 are respectively counted , and the unit is a bit.
- the statistics timer expires, based on the above statistics, the statistics of the following nth statistical period can be calculated:
- smoothing is performed according to the forgetting factor filtering manner, and the smoothed statistic is obtained, which is used in a specific parallel scheduling method.
- the smoothing value is calculated as follows:
- X'(n) is the smoothed value obtained by the smoothing of the statistic X(n) obtained in the statistical period
- X'(n-1) is the smoothed value obtained after the statistic obtained in the last statistical period is smoothed
- X(n) is the statistical value of the statistics obtained during the statistical period
- ⁇ is a forgetting factor, and the value ranges from ⁇ 1, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256 ⁇ , not limited to this. If ⁇ is 1, It means that the statistical value is not smoothed, and the statistical result of the current statistical period is directly used.
- the smoothed statistic R' cc1_LCGi (n) (1 - ⁇ ) ⁇ R' cc1_LCGi (n-1) + ⁇ ⁇ R cc1_LCGi (n)
- Step 2 Determine the amount of data to be transmitted on each UE to be scheduled to be transmitted when the aggregate CC is scheduled in parallel.
- the data volume of the uplink LCG i to be scheduled on each aggregation CC is determined based on the buffer occupancy (BO) buffer data amount of the LCG i and the distribution ratio coefficient of the data to be transmitted.
- BO buffer occupancy
- the uplink data points of the uplink LCG i of any to-be-scheduled UE on CC1 and CC2 are respectively denoted as ⁇ 1, LCGi and ⁇ 2, LCGi , ⁇ 1, and LCGi indicates that the LCG i corresponds to the carrier CC1.
- the data amount distribution ratio coefficient, ⁇ 2, LCGi represents the distribution coefficient of the data volume to be transmitted corresponding to the LCG i corresponding to the carrier CC2. From the perspective of the UE, the ratios of the amount of data to be transmitted of the uplink LCG i on the PCell and the SCell of the UE to which it belongs are denoted as ⁇ PCell, LCGi and ⁇ SCell, LCGi , respectively:
- the amount of the buffered data of the uplink LCG i of the UE is multiplied by the proportion of the data to be transmitted corresponding to the aggregated carrier CC, and the product is the uplink bearer LCG of the UE that needs to be transmitted on the current aggregated carrier CC.
- the update cycle time is T update .
- the update cycle time length may be greater than or equal to the length of the statistical statistical cycle described above, that is, T update ⁇ T statistic .
- the periodic update timer corresponding to the update period may be UE level or cell level. If it is UE-level, that is, when the UE activates the SCell, the periodic update timer is started. When the periodic update timer expires, the UE performs the following method to perform the update of the proportion of the data to be transmitted corresponding to the bearer on the two CCs. If the cell is in the cell level, the periodic update timer is started when the first UE activates the SCell in the cell. When the periodic update timer expires, all the UEs in the cell that have activated the SCell perform the corresponding bearer according to the following method. The amount of data to be transmitted on the two CCs is assigned a proportional coefficient update judgment operation.
- the specific update method is as follows:
- the ratio of the to-be-transmitted data amount distribution coefficient on each of the uplink LCG i of each UE is performed as follows: operating.
- the current ⁇ PCell, LCGi > 0 and ⁇ SCell, LCGi > 0 according to the current mth update period, the recorded last smooth LCG filtered by the nth statistical period smoothing on the actual transmission on the two CCs
- the data rate updates its BO allocation ratio on the two CCs, and the ratio is used as the proportion of the BO allocated on the two CCs in the m+1th update cycle time (ie, mT update ⁇ (m+1)T update ).
- the specific update formula is as follows:
- the statistical period of the statistic and the update period of the proportion of the data to be transmitted on the aggregated carrier CC are two parameters.
- the amount of data to be transmitted of the uplink LCGi on each available aggregate carrier CC is determined as follows:
- Data1, LCGi indicates the amount of data to be transmitted on the available aggregated carrier CC1 of the to-be-scheduled uplink LCG i of the UE to be scheduled at the current scheduling subframe time;
- Data 2, LCGi indicates that the current scheduled subframe time is to be The amount of data to be transmitted on the available aggregation carrier CC2 of the to-be-scheduled uplink LCG i of the UE is scheduled;
- the BO LCGi represents the amount of buffered data recorded by the base station side of the to-be-scheduled uplink LCG i of the to-be-scheduled UE.
- the first embodiment of the present invention provides a method for performing parallel scheduling based on the transmission capabilities of each aggregated carrier provided by the embodiment of the present disclosure.
- Step 1 Collect and process statistics.
- LCG1, LCG2, and LCG3 where LCG1 belongs to UE1, and LCG2 and LCG3 belong to UE2.
- the total amount of data transmitted by each uplink LCG i on two aggregated carrier CCs in the second statistical period is:
- the transmission data amount of LCG1 is 400 bits
- the transmission data amount of LCG2 is 800 bits
- the transmission data amount of LCG3 is 1200 bits.
- the transmission data amount of LCG1 is 800 bits
- the transmission data amount of LCG2 is 1200 bits
- the transmission data amount of LCG3 is 400 bits.
- the average transmission rate of the second statistical period of each uplink LCGi on the two aggregated carrier CCs can be calculated:
- the average transmission rate of LCG1 is 80 kbps
- the average transmission rate of LCG2 is 40 kbps
- the average transmission rate of LCG3 is 80 kbps.
- the average transmission rate of LCG1 is 40 kbps, and the average transmission rate of LCG2 is 40 kbps, LCG3.
- the average transmission rate is 80 kbps.
- Step 2 Determine the amount of data to be transmitted on each UE's bearer (LCG and/or RB) when the aggregate CC is scheduled in parallel.
- the LCGi is to be transmitted on the 2 available aggregate carrier CCs.
- the quantities are as follows:
- Method 2 Parallel scheduling is performed based on equal load of each aggregated carrier.
- Step 1 Statistical description, including statistics, statistical methods, and statistical calculation formulas.
- the periodic statistics describe the statistics as follows. It is assumed that the statistical cycle time length is T statistic (in ms), n represents the nth statistical period, and the statistics required in the t-th statistical cycle time T statistic are as follows:
- the statistics timer expires, based on the above statistics, the statistics of the following nth statistical period can be calculated:
- R cc1_LCGi (n) and R cc2_LCGi (n) respectively represent the average transmission rate of the uplink LCG i on the two aggregated carriers CC, in kbps, and the formula is as follows:
- P cc1_LCGi (n) and P cc2_LCGi (n) respectively represent the actual resource occupancy rate of the uplink LCG i in the corresponding cell of the two aggregated carriers CC, and the calculation formula is as follows:
- N UL_subframe indicates the number of uplink subframes in a radio frame
- M1 indicates the total number of available PRBs of the carrier CC1
- M2 indicates the total available of the carrier CC2. The number of bandwidth PRBs.
- N CC1_LCGi (n) and N CC2_LCGi (n) respectively represent the actual occupied resource PRBs of the uplink LCG i in the cells corresponding to the two aggregated carrier CCs, and the calculation formula is as follows:
- N CC1_UEj_LCG_NUM and N CC2_UEj_LCG_NUM respectively indicate the number of LCGs that UEj participates in scheduled transmission in CC1 and CC2 in the nth statistical period.
- X'(n) is the smoothed value obtained by the statistic X after smoothing this time
- X'(n-1) is the smoothed value obtained by the statistic X after the last smoothing
- X(n) is the statistical value of the statistic X obtained during the statistical period
- ⁇ is a forgetting factor, and the value ranges from ⁇ 1, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256 ⁇ , not limited to this, if ⁇ is 1 , indicating that the statistical values are not smoothed.
- Step 2 Determine the amount of data to be transmitted on each UE's bearer (LCG and/or RB) when the aggregate CC is scheduled in parallel.
- the data volume of the uplink LCG i to be scheduled on each aggregation CC is determined based on the BO cache data amount of the LCG i and the distribution ratio coefficient of the data to be transmitted. Assume that the uplink data LCG of a certain UE's uplink LCG i is proportional to ⁇ 1,LCGi and ⁇ 2, LCGi and ⁇ 1, respectively, and LCGi indicates that the LCG i corresponds to carrier CC1.
- the data amount distribution ratio coefficient, ⁇ 2, LCGi represents the distribution coefficient of the data volume to be transmitted corresponding to the LCG i corresponding to the carrier CC2.
- the amount of the buffered data of the uplink LCG i of the UE is multiplied by the proportion of the data to be transmitted corresponding to the aggregated carrier CC, and the product is the uplink bearer LCG of the UE that needs to be transmitted on the current aggregated carrier CC.
- the ratio of the amount of data to be transmitted on the two aggregated carrier CCs of each uplink LCG i of each UE is periodically updated, and the length of the update period is T update .
- the update cycle time length requirement is greater than or equal to the length of the statistical statistics cycle described above, that is, T update ⁇ T statistic .
- the periodic update timer may be UE level or cell level. If it is UE-level, that is, when the UE activates the SCell, the periodic update timer is started. When the periodic update timer expires, the UE performs the following method to perform the update of the proportion of the data to be transmitted corresponding to the bearer on the two CCs.
- the periodic update timer is started when the first UE activates the SCell in the cell.
- the timer expires, all UEs in the cell that have activated the SCell perform the corresponding bearer in the two CCs according to the following method.
- the amount of data to be transmitted on the distribution ratio coefficient update judgment operation is not limited to the following method.
- the allocation scale coefficient update operation is performed as follows for each of the uplink LCGs of each UE to allocate a proportional coefficient of the data volume to be transmitted on the two aggregated carrier CCs.
- the specific update scheme is as follows:
- the current ⁇ PCell, LCGi > 0 and ⁇ SCell, LCGi > 0 according to the current mth update period, the recorded last smooth LCG filtered by the nth statistical period smoothing on the actual transmission on the two CCs
- the data rate updates its BO allocation ratio on the two CCs, and the ratio is used as the proportion of the BO allocated on the two CCs in the m+1th update cycle time (ie, mT update ⁇ (m+1)T update ).
- eff' CC1_LCGi (n) represents the spectral efficiency after smoothing through the nth statistical period filter, that is, X'(n) corresponding to the previous step 1.
- M1 represents the total number of available PRBs corresponding to the bandwidth of the aggregated carrier CC1
- M2 represents the total number of available PRBs corresponding to the bandwidth of the aggregated carrier CC2.
- the amount of data to be transmitted of the uplink LCGi on each available aggregate carrier CC is determined as follows:
- Data1, LCGi, and Data2, and LCGi respectively indicate the amount of data to be transmitted on the available aggregated carriers CC1 and CC2 of the to-be-scheduled uplink LCG i of the UE to be scheduled; BO LCGi indicates the to-be-scheduled The amount of buffered data recorded by the base station side of the uplink LCG i to be scheduled by the UE.
- Embodiment 2 A CA system configured with two component carriers is taken as an example to introduce a parallel scheduling method based on equal load of each aggregate carrier in the present application.
- Step 1 Collect and process statistics.
- the system bandwidth of the two aggregated carriers is 101 for CC1 and 50 PRB for CC1 respectively. ; CC2 corresponds to 20M, 100 PRB.
- the total number of actual resource occupations of each uplink UE j corresponding to the two aggregated carrier CCs is:
- the total number of actual resources occupied by UE1 is 40, and the total number of actual resources occupied by UE2 is 200.
- the total number of actual resources occupied by UE1 is 80, and the total number of actual resources occupied by UE2 is 160.
- the total amount of data transmitted by each uplink LCG i on two aggregated carrier CCs in the second statistical period is:
- the transmission data amount of LCG1 is 400 bits
- the transmission data amount of LCG2 is 800 bits
- the transmission data amount of LCG3 is 1200 bits.
- the transmission data amount of LCG1 is 800 bits
- the transmission data amount of LCG2 is 1200 bits
- the transmission data amount of LCG3 is 400 bits.
- the average transmission rate of the second statistical period of each uplink LCGi on the two aggregated carrier CCs can be calculated:
- the actual resource occupancy rate of the cells corresponding to the two aggregated carrier CCs in the second statistical period of each LCGi can be calculated:
- each uplink LCGi is in the second statistical period in 2 aggregate carriers CC
- Uplink spectrum efficiency of the corresponding cell
- the uplink spectral efficiency of LCG1 is 0.6 kbps/Hz
- the uplink spectral efficiency of LCG2 is 0.8 kbps/Hz
- the uplink spectral efficiency of LCG3 is 0.7 kbps/Hz.
- the upstream spectral efficiency of LCG1 is 0.8 kbps/Hz
- the upstream spectral efficiency of LCG2 is 0.7 kbps/Hz
- the upstream spectral efficiency of LCG3 is 0.6 kbps/Hz.
- Step 2 Determine the amount of data to be transmitted on each UE's bearer (LCG and/or RB) when the aggregate CC is scheduled in parallel.
- the LCGi is to be transmitted on the 2 available aggregate carrier CCs.
- the quantities are as follows:
- Simplified method 1 UE-level update BO allocation scale factor.
- Simplified method 2 The cell-level update BO allocation scale factor.
- the above example is a carrier aggregation parallel scheduling method for uplink services, and a carrier aggregation parallel scheduling method for downlink services is similar to uplink.
- the difference is that the statistic needs to be replaced with the actual transmission data amount and the actual occupied resource PRB for the downlink bearer of the UE, and then the actual transmission data rate and spectrum efficiency of the downlink bearer of the UE are calculated, and the downlink bearer RB i is correspondingly corresponding.
- the PBR of the uplink LCG i is replaced by the minimum bit rate (MinBR) of the downlink RB i.
- a component carrier scheduling apparatus in a carrier aggregation scenario provided by an embodiment of the present application includes:
- the first unit 11 is configured to determine that a component carrier in a carrier aggregation scenario needs to be scheduled
- the second unit 12 is configured to determine, for each component carrier, a to-be-scheduled bearer list of the user equipment UE to be scheduled on the component carrier, and, for each to-be-scheduled bearer, according to the cache data amount of the to-be-scheduled bearer The proportion of the data to be transmitted on the component carrier is allocated, and the amount of data to be transmitted that is to be scheduled to be carried on the component carrier is determined.
- the second unit is further configured to: periodically update, according to the first period, a proportion of a data amount to be transmitted of each to-be-scheduled bearer on any component carrier.
- the second unit performs, to be transmitted, the data to be transmitted that is to be scheduled to be carried on any component carrier according to the following manner.
- the quantity distribution factor is periodically updated:
- the distribution scale factor is periodically updated.
- the second unit performs periodic statistics on the statistic of the to-be-scheduled bearer on each component carrier according to the second period, and obtains a statistical result for each to-be-scheduled bearer:
- the average transmission rate or the smoothed average transmission rate of the to-be-scheduled bearer on the component carrier is used as a statistical result of the to-be-scheduled bearer on the component carrier.
- the second unit performs periodic statistics on the statistic of the to-be-scheduled bearer on each component carrier according to the second period, and obtains a statistical result for each to-be-scheduled bearer:
- the spectrum efficiency of the cell to be scheduled to be carried in the corresponding cell of the component carrier or the smoothed spectrum efficiency is used as the statistical result of the to-be-scheduled bearer on the component carrier.
- the second unit when the second unit calculates the spectrum efficiency of the to-be-scheduled bearer in the corresponding cell of each component carrier according to the second period, the second unit is specifically configured to:
- the total transmission data amount of the to-be-scheduled bearer on each component carrier is counted, and the to-be-scheduled bearer is determined on each component carrier according to the total transmission data amount of the to-be-scheduled bearer on each component carrier.
- the second unit is further configured to: according to the second period, collect, for each UE that needs to be scheduled, a total number of physical resource blocks PRB occupied by the UE in each component carrier;
- the second unit determines the actual number of PRBs of the to-be-scheduled bearer i in the cell corresponding to any component carrier CCq:
- the N CCq_bearer i (n) represents the actual number of PRBs of the cell to be scheduled i to be in the cell corresponding to the component carrier CCq in the nth second period of the most recent statistics, and N CCq_UEj (n) indicates the most recent statistics.
- the total number of PRBs occupied by the UEj in the nth second period that needs to be scheduled in the component carrier CCq, and the D CCq_bearing i (n) indicates that it is to be scheduled in the nth second period of the most recent statistics.
- N CCq_UEj_bearer_NUM indicates the number of bearers that the UEj participates in the scheduled transmission in the CCq in the nth second period of the most recent statistics, where i, j, n, q is an arbitrary natural number.
- the proportion of the data to be transmitted on the same component carrier is the same in any first period.
- each of the to-be-scheduled bearers in a cell belongs to the same, and the proportion of the data to be transmitted on the same component carrier is the same in any first period.
- the first unit above may be the second unit of the scheduling CC selection module shown in FIG. 1 above, and may include each CC resource scheduling module shown in FIG. 1 above.
- the second unit may further be refined into a statistical unit, a BO allocation proportional coefficient updating unit, and a CC parallel scheduling data amount determining unit.
- the unit is responsible for periodically counting the amount of transmission data of the UE bearer (LCG and/or RB) and the number of actually occupied resource PRBs, and calculating the actual transmission data rate of the UE bearer (LCG and/or RB) from the information. ,Spectral efficiency.
- the aggregated CC parallel scheduling data to be transmitted determining unit periodically determines the BO allocation ratio coefficient of the UE bearer (LCG and/or RB) on its available aggregate carrier CC, and determines the bearer of each UE when the aggregate CC is scheduled in parallel. (LCG and / or RB) The amount of data to be transmitted on it.
- a component carrier scheduling apparatus in another carrier aggregation scenario provided by the embodiment of the present application includes:
- the processor 500 is configured to read a program in the memory 520 and perform the following process:
- the quantity allocation ratio coefficient determines the amount of data to be transmitted that is to be scheduled to be carried on the component carrier.
- the processor 500 is further configured to: periodically update, according to the first period, a data distribution ratio coefficient to be transmitted that is to be transmitted on any component carrier.
- the processor 500 periodically updates the proportion of the data to be transmitted of each to-be-scheduled bearer on any component carrier according to the following manner:
- the distribution scale factor is periodically updated.
- the processor 500 performs periodic statistics on the statistic of the to-be-scheduled bearer on each component carrier according to the second period, and obtains a statistical result for each to-be-scheduled bearer:
- the average transmission rate or the smoothed average transmission rate of the to-be-scheduled bearer on the component carrier is used as a statistical result of the to-be-scheduled bearer on the component carrier.
- the processor 500 performs periodic statistics on the statistic of the to-be-scheduled bearer on each component carrier according to the second period, and obtains a statistical result for each to-be-scheduled bearer:
- the spectrum efficiency of the cell to be scheduled to be carried in the corresponding cell of the component carrier or the smoothed spectrum efficiency is used as the statistical result of the to-be-scheduled bearer on the component carrier.
- the processor 500 collects the spectrum efficiency of the to-be-scheduled bearer in the corresponding cell of each component carrier according to the second period
- the processor is specifically configured to:
- the total transmission data amount of the to-be-scheduled bearer on each component carrier is counted, and the to-be-scheduled bearer is determined on each component carrier according to the total transmission data amount of the to-be-scheduled bearer on each component carrier.
- the processor 500 is further configured to: according to the second period, collect, for each UE that needs to be scheduled, a total number of physical resource blocks PRB occupied by the UE in a cell corresponding to each component carrier;
- the second unit determines the actual number of PRBs of the to-be-scheduled bearer i in the cell corresponding to any component carrier CCq:
- the N CCq_bearer i (n) indicates the actual number of PRBs to be scheduled in the nth second period of the last statistics, and the number of PRBs in the corresponding cell of the component carrier CCq, and N CCq_UEj (n) indicates the most recent statistics.
- the total number of PRBs occupied by the UEj in the nth second period that needs to be scheduled in the component carrier CCq, and the D CCq_bearing i (n) indicates that it is to be scheduled in the nth second period of the most recent statistics.
- N CCq_UEj_bearer_NUM indicates the number of bearers that the UEj participates in the scheduled transmission in the CCq in the nth second period of the most recent statistics, where i, j, n, q is an arbitrary natural number.
- the proportion of the data to be transmitted on the same component carrier is the same in any first period.
- the proportion of the data to be transmitted on the same component carrier is the same in any first period.
- the transceiver 510 is configured to receive and transmit data under the control of the processor 500.
- the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 500 and various circuits of memory represented by memory 520.
- the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
- the bus interface provides an interface.
- Transceiver 510 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
- the processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.
- the parallel scheduling method for carrier aggregation includes uplink and downlink.
- the method determines the amount of data to be transmitted by the bearer (LCG and/or RB) of each UE when the aggregate CC is scheduled in parallel by the statistics of the periodic statistics (filtering), so that one scheduling subframe time can be simultaneously executed.
- Resource allocation of aggregated carrier CCs Through periodic statistics, the periodic triggering update activates the BO allocation scale coefficient of the bearer (LCG and/or RB) of the UE of the SCell on its available aggregated carrier CC, thereby implementing a scheduling subframe time, and performing multiple aggregations simultaneously.
- Resource allocation of carrier CC Resource allocation of carrier CC.
- Method 1 proposes a parallel scheduling method based on the transmission capabilities of each aggregated carrier, the advantage of which is to maximize the system throughput;
- Method 2 proposes a parallel scheduling method based on the equal load of each aggregated carrier, and its advantages
- the fast load balancing between the aggregated carriers is achieved by scheduling.
- Two simplified methods greatly reduce the amount of calculation, which is beneficial to improve the calculation efficiency after the product is realized.
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Abstract
本申请公开了一种载波聚合场景下的成员载波调度方法及装置,用以实现成员载波的并行调度,从而达到调度更快、实现复杂度更低、对产品硬件处理能力要求更低的优势。本申请提供的一种载波聚合场景下的成员载波调度方法,包括:确定需要调度载波聚合场景下的成员载波;针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量。
Description
本申请要求在2015年6月10日提交中国专利局、申请号为201510316298.1、申请名称为“一种载波聚合场景下的成员载波调度方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及通信技术领域,尤其涉及一种载波聚合场景下的成员载波调度方法及装置。
在LTE(Long Term Evolution,长期演进)系统中,服务小区是为UE(User Equipment,用户设备)提供数据传输服务的小区,每个UE最多只存在一个服务小区。版本10(Rel-10)引入CA(Carrier Aggregation,载波聚合)技术后,UE可以同时有多个服务小区,即系统将两个或更多可用的载波聚合在一起,组成一个更大的传输带宽,为了达到更高的传输速率,为UE提供更好的服务体验。因此,为UE服务的小区被分为两类:PCell(Primary Cell,主服务小区),和SCell(Secondary Cell,辅服务小区),其中,PCell对应PCC(Primary Component Carrier,主成员载波),SCell对应SCC(Secondary Component Carrier,辅成员载波)。PCell继承LTE系统中服务小区的性质,而SCell仅被作为附加的资源,承载数据传输的功能。PCell和SCell都是从UE的角度来说的。PCell即为UE建立RRC连接的服务小区,其建立过程与LTE系统完全相同。SCell由基站的RRC层进行配置。基站根据实际需求对UE进行SCell配置,SCell配置包括SCell的添加、SCell的删除和SCell的修改,通过RRC重配置过程完成。
现有的聚合载波调度方法是将多个聚合的载波看作一个整体进行调度的,即当调度子帧到达时,依次对每个聚合载波进行调度,首先选择将该载波作为PCell的UE依次进行调度,以保证UE的基础QoS(Quality of Service,服务质量)的资源需求进行资源分配。当完成PCell调度后,依次对每个聚合载波再次进行调度,选择将该载波作为SCell的UE依次进行调度,要求此聚合载波存在剩余资源,并且待调度UE的缓存中仍然有待调度数据,为这些UE待调度数据分配聚合载波的剩余资源,此时是以最大化满足UE数据传输需求进行资源分配的调度。
综上所述,现有技术中的聚合载波调度方法是一种串行的多轮调度方法,一方面至少需要经过两轮的调度,才能完成聚合载波的资源分配,另一方面串行的调度方式要求产品
实现时硬件处理能力更高,否则就不能调度处理更多UE。
发明内容
本申请实施例提供了一种载波聚合场景下的成员载波调度方法及装置,用以实现成员载波的并行调度,从而达到调度更快、实现复杂度更低、对产品硬件处理能力要求更低的优势。
本申请实施例提供的一种载波聚合场景下的成员载波调度方法,包括:
确定需要调度载波聚合场景下的成员载波;
针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量。
通过该方法,在确定需要调度载波聚合场景下的成员载波后,针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量,从而可以实现成员载波的并行调度,达到调度更快、实现复杂度更低、对产品硬件处理能力要求更低的有益效果。
可选的,每一待调度承载在任一成员载波上的待传输数据量分配比例系数,是按照第一周期进行周期性更新的。从而使得确定的待调度承载在成员载波上的待传输数据量更为合理,成员载波的调度更为准确,符合实际情况的变化。
可选的,每一待调度承载在任一成员载波上的待传输数据量分配比例系数,按照如下方式进行周期性更新:
针对每一待调度承载:
按照第一周期,利用按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到的最新统计结果,对该待调度承载在每一成员载波上的待传输数据量分配比例系数进行周期性更新。
可选的,针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波上的平均传输速率;
对于每一成员载波,将该待调度承载在该成员载波上的平均传输速率或平滑后的平均传输速率,作为该待调度承载在该成员载波上的统计结果。
可选的,针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率;
对于每一成员载波,将该待调度承载在该成员载波对应小区的频谱效率或平滑后的频谱效率,作为该待调度承载在该成员载波上的统计结果。
可选的,按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率,包括:
针对每一待调度承载:
按照第二周期,统计该待调度承载在每一成员载波上的总传输数据量,并根据该待调度承载在每一成员载波上的总传输数据量,确定该待调度承载在每一成员载波上的数据传输速率;
确定该待调度承载在每一成员载波对应小区的PRB实际占用个数,并根据该PRB实际占用个数确定该待调度承载在每一成员载波对应小区的实际资源占用率。
可选的,该方法还包括:按照第二周期,针对每一需要调度的UE,统计该UE在每一成员载波对应小区的物理资源块PRB占用总个数;
针对任一待调度承载i,采用如下公式确定该待调度承载i在任一成员载波CCq对应小区的PRB实际占用个数:
其中,NCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq对应小区的PRB实际占用个数,NCCq_UEj(n)表示在最近一次统计的第n个第二周期内任一所述需要调度的UEj在成员载波CCq对应小区的PRB占用总个数,DCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq上的总传输数据量,NCCq_UEj_承载_NUM表示在最近一次统计的第n个第二周期内UEj在CCq参与调度传输的承载个数,其中i、j、n、q均为任意自然数。
可选的,同属于一个UE的每一待调度承载,在任一所述第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
可选的,同属于一个小区内的每一待调度承载,在任一所述第一周期内,在同一成员
载波上的待传输数据量分配比例系数相同。
本申请实施例提供的一种载波聚合场景下的成员载波调度装置,包括:
第一单元,用于确定需要调度载波聚合场景下的成员载波;
第二单元,用于针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量。
可选的,所述第二单元还用于:按照第一周期进行周期性更新每一待调度承载在任一成员载波上的待传输数据量分配比例系数。
可选的,所述第二单元按照如下方式对每一待调度承载在任一成员载波上的待传输数据量分配比例系数进行周期性更新:
针对每一待调度承载:
按照第一周期,利用按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到的最新统计结果,对该待调度承载在每一成员载波上的待传输数据量分配比例系数进行周期性更新。
可选的,所述第二单元针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波上的平均传输速率;
对于每一成员载波,将该待调度承载在该成员载波上的平均传输速率或平滑后的平均传输速率,作为该待调度承载在该成员载波上的统计结果。
可选的,所述第二单元针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率;
对于每一成员载波,将该待调度承载在该成员载波对应小区的频谱效率或平滑后的频谱效率,作为该待调度承载在该成员载波上的统计结果。
可选的,所述第二单元按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率时,具体用于:
针对每一待调度承载:
按照第二周期,统计该待调度承载在每一成员载波上的总传输数据量,并根据该待调度承载在每一成员载波上的总传输数据量,确定该待调度承载在每一成员载波上的数据传
输速率;
确定该待调度承载在每一成员载波对应小区的PRB实际占用个数,并根据该PRB实际占用个数确定该待调度承载在每一成员载波对应小区的实际资源占用率。
可选的,所述第二单元还用于:按照第二周期,针对每一需要调度的UE,统计该UE在每一成员载波对应小区的物理资源块PRB占用总个数;
所述第二单元针对任一待调度承载i,采用如下公式确定该待调度承载i在任一成员载波CCq对应小区的PRB实际占用个数:
其中,NCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq对应小区的PRB实际占用个数,NCCq_UEj(n)表示在最近一次统计的第n个第二周期内任一所述需要调度的UEj在成员载波CCq对应小区的PRB占用总个数,DCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq上的总传输数据量,NCCq_UEj_承载_NUM表示在最近一次统计的第n个第二周期内UEj在CCq参与调度传输的承载个数,其中i、j、n、q均为任意自然数。
可选的,同属于一个UE的每一待调度承载,在任一所述第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
可选的,同属于一个小区内的每一待调度承载,在任一所述第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
图1为本申请实施例提供的一种载波聚合情况下的成员载波的并行调度示意图;
图2为本申请实施例提供的一种载波聚合场景下的成员载波调度方法的流程示意图;
图3为本申请实施例提供的一种载波聚合场景下的成员载波调度装置的结构示意图;
图4为本申请实施例提供的另一种载波聚合场景下的成员载波调度装置的结构示意图。
本申请实施例提供了一种载波聚合场景下的成员载波调度方法及装置,用以实现成员
载波的并行调度,从而达到调度更快、实现复杂度更低、对产品硬件处理能力要求更低的优势。
本申请实施例,通过提前分配好在每个聚合载波(即多个载波聚合时,这多个聚合的载波中的每一载波,也称为成员载波)上待传输的数据,实现多个聚合载波并行调度,一次资源分配就同时完成了多个聚合载波的资源分配。这种方法能有效的降低多载波聚合调度在产品实现中对硬件处理能力的要求,在保证系统性能的基础上,更快捷的同时完成多个聚合载波的资源分配和调度,达到快速调整各个载波资源的目的。
本申请实施例中提出的技术方案,在调度子帧时刻针对待调度UE的LCG(Logical Channel Group,上行逻辑信道组)和/或下行RB(Radio Bearer,无线承载)待调度承载,确定其在可用的每个聚合载波CC上的待传输的数据量。如图1所示,在调度CC(Component Carrier,成员载波)选择模块中分别确定每个聚合载波CC,并且确定在当前调度中需要调度的UE的承载列表,以及最终确定具体的该承载列表中每一UE的待调度承载的待调度数据量。
参见图2,本申请实施例提供的一种载波聚合场景下的成员载波调度方法,包括:
S101、确定需要调度载波聚合场景下的成员载波;
S102、针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量。
本申请实施例中的待调度承载,在上行方向,是指待调度的上行逻辑信道组,在下行方向,是指待调度的下行无线承载。
通过该方法,在确定需要调度载波聚合场景下的成员载波后,针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量,从而可以实现成员载波的并行调度,达到调度更快、实现复杂度更低、对产品硬件处理能力要求更低的有益效果。
可选的,每一待调度承载在任一成员载波上的待传输数据量分配比例系数,是按照第一周期(也可以称为更新周期)进行周期性更新的。具体的更新方式可以有多种。通过周期性地更新每一待调度承载在任一成员载波上的待传输数据量分配比例系数,从而使得确定的待调度承载在成员载波上的待传输数据量更为合理,成员载波的调度更为准确,符合实际情况的变化。
可选的,每一待调度承载在任一成员载波上的待传输数据量分配比例系数,按照如下
方式进行周期性更新:
针对每一待调度承载:
按照第一周期,利用按照第二周期(也可以称为统计周期)对该待调度承载在每一成员载波上的统计量进行周期性统计得到的最新统计结果,对该待调度承载在每一成员载波上的待传输数据量分配比例系数进行周期性更新。
其中,的统计量可以有多种,例如,可以是待调度承载在成员载波上的平均传输速率,也可以是待调度承载在成员载波对应小区的频谱效率等等。
可选的,针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波上的平均传输速率;
对于每一成员载波,将该待调度承载在该成员载波上的平均传输速率或平滑后的平均传输速率,作为该待调度承载在该成员载波上的统计结果。
本申请实施例中可以对任一统计量进行平滑处理,后续利用平滑处理后得到的统计量进行相应处理。
作为另外一种统计方式,可选的,针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率;
对于每一成员载波,将该待调度承载在该成员载波对应小区的频谱效率或平滑后的频谱效率,作为该待调度承载在该成员载波上的统计结果。
可选的,按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率,包括:
针对每一待调度承载:
按照第二周期,统计该待调度承载在每一成员载波上的总传输数据量,并根据该待调度承载在每一成员载波上的总传输数据量,确定该待调度承载在每一成员载波上的数据传输速率;
确定该待调度承载在每一成员载波对应小区的PRB实际占用个数,并根据该PRB实际占用个数确定该待调度承载在每一成员载波对应小区的实际资源占用率。
可选的,该方法还包括:按照第二周期,针对每一需要调度的UE,统计该UE在每一成员载波对应小区的物理资源块PRB占用总个数;
针对任一待调度承载i,采用如下公式确定该待调度承载i在任一成员载波CCq对应小区的PRB实际占用个数:
其中,NCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq对应小区的PRB实际占用个数,NCCq_UEj(n)表示在最近一次统计的第n个第二周期内任一需要调度的UEj在成员载波CCq对应小区的PRB占用总个数,DCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq上的总传输数据量,NCCq_UEj_承载_NUM表示在最近一次统计的第n个第二周期内UEj在CCq参与调度传输的承载个数,其中i、j、n、q均为任意自然数。
除了上述几种待传输数据量分配比例系数的更新方式之外,还可以采用更为简化的方式,例如:
可选的,同属于一个UE的每一待调度承载,在任一第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
或者,同属于一个小区内的每一待调度承载,在任一第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
本申请实施例中的第一周期和第二周期的周期长度可以相同也可以不同。具体的周期长度可以根据实际需要而定。
下面以具体实施步骤介绍详细方法,以2个聚合载波和上行调度(更多个聚合载波以及下行调度的情况同理)为例进行描述。具体方法包括两种,一种是基于各个聚合载波的传输能力进行并行调度,另一种是基于各个聚合载波的负荷相等进行并行调度,同时提出了两种简化方法。假设聚合两个载波分别表示为CC1和CC2。
方法一:基于各个聚合载波的传输能力进行并行调度。具体流程包括:
步骤一:按照预设的统计周期进行统计,得到统计量。
假设统计周期(即上述第二周期)时间长度为Tstatistic(单位ms),n表示第n个统计周期,在第n个统计周期时间Tstatistic内需要统计的统计量如下:
分别统计各待调度UE的任一上行LCG i在CC1上的总传输数据量Dcc1_LCGi(n)和在CC2上的总传输数据量Dcc2_LCGi(n),单位为比特(bit)。
当统计周期达到时,即统计定时器超时,基于以上统计量,可以计算得出下列第n个统计周期的统计量:
任一上行LCG i在CC1上的平均传输速率Rcc1_LCGi(n)和在CC2上的平均传输速率Rcc2_LCGi(n),单位为kbps,计算公式如下:
可选地,对于以上直接统计得到的以及通过计算得到的各个统计量,按照遗忘因子滤波的方式进行平滑,得到平滑后的统计量,在具体的并行调度方法中使用。假设滤波的统计量为X,平滑值的计算方法如下:
X'(n)=(1-α)·X'(n-1)+α·X(n)
其中:X'(n)为本次统计周期内得到的统计量X(n)经本次平滑后得到的平滑值;
X'(n-1)为上一次统计周期内得到的统计量经平滑后得到的平滑值;
X(n)为本次统计周期内得到的统计量的统计值;
α为遗忘因子,取值范围为{1,1/4,1/8,1/16,1/32,1/64,1/128,1/256},不限于此,如果α取1,则表示不对统计值进行平滑处理,直接采用当前统计周期的统计结果。
例如,对统计量Rcc1_LCGi(n)进行平滑时,得到平滑后的统计量R'cc1_LCGi(n)=(1-α)·R'cc1_LCGi(n-1)+α·Rcc1_LCGi(n),对统计量Rcc2_LCGi(n)进行平滑时,得到平滑后的统计量R'cc2_LCGi(n)=(1-α)·R'cc2_LCGi(n-1)+α·Rcc2_LCGi(n)。
步骤二:确定聚合CC并行调度时每个UE的待调度承载在其上待传输的数据量。
每个聚合CC上待调度的上行LCG i的数据量就是基于该LCG i的缓存占用量(buffer occupancy,BO)缓存数据量和待传数据量分配比例系数最终确定。
假设任一待调度UE的上行LCG i在CC1和CC2上的待传数据量分配比例系数分别记为ρ1,LCGi和ρ2,LCGi,ρ1,LCGi表示该LCG i在载波CC1对应的待传数据量分配比例系数,ρ2,LCGi表示该LCG i在载波CC2对应的待传数据量分配比例系数。从UE的角度看,该上行LCG i在其所属UE的PCell和SCell上的待传数据量分配比例系数分别记为ρPCell,LCGi和ρSCell,LCGi,则:
ρ1,LCGi=ρPCell,LCGi,ρ2,LCGi=ρSCell,LCGi;或者,
ρ1,LCGi=ρSCell,LCGi,ρ2,LCGi=ρPCell,LCGi。
在调度子帧时刻,以UE的上行LCG i的缓存数据量乘以聚合载波CC对应的待传数据量分配比例系数,乘积即为当前该聚合载波CC上需要待传输的该UE对应上行承载LCG i的数据量。
进一步地,还可以以预设的更新周期(即上述的第一周期),周期性地更新每个UE的每个上行LCG i在2个聚合载波CC上的待传数据量分配比例系数,假设更新周期时间长度为Tupdate。更新周期时间长度可以大于或等于前面描述的统计量统计周期时间长度,即Tupdate≥Tstatistic。
该更新周期对应的周期更新定时器可以是UE级的,也可以是小区级的。如果是UE级的,即在该UE激活SCell时启动该周期更新定时器,当周期更新定时器超时,该UE按照如下方法执行对应承载在2个CC上的待传数据量分配比例系数更新判断操作;如果是小区级的,则在小区内第一个UE激活SCell时启动该周期更新定时器,当该周期更新定时器超时,小区内所有激活了SCell的UE都按照如下方法执行对应承载在2个CC上的待传数据量分配比例系数更新判断操作。具体的更新方法如下:
当待传数据量分配比例系数更新周期到达时,即更新周期定时器超时时,为每个UE的每个上行LCG i在2个CC上的待传数据量分配比例系数执行如下分配比例系数更新操作。
对于任一待调度上行LCG i(LCG i为某个UE的GBR LCG或者NGBR LCG),具体更新方案如下:
如果当前ρPCell,LCGi=1且ρSCell,LCGi=0,或者ρPCell,LCGi=0且ρSCell,LCGi=1,则对上行LCG i在2个CC上的BO分配比例系数不做调整。
否则,当前ρPCell,LCGi>0且ρSCell,LCGi>0,则根据当前第m个更新周期时刻,记录的经过第n个统计周期滤波平滑的最新上行LCG i在两个CC上实际的传输数据速率更新其在两个CC上的BO分配比例,并将该比例作为第m+1个更新周期时间内(即mTupdate~(m+1)Tupdate)在两个CC上分配BO的比例。具体更新公式如下:
ρ2,LCGi(m)=1-ρ1,LCGi(m)
需要说明的是,本申请实施例中,统计量的统计周期和聚合载波CC上的待传数据量分配比例系数的更新周期是两个参数。
确定该上行LCGi在每个可用聚合载波CC上的待传输数据量,方法如下:
Data1,LCGi=ρ1,LCGi*BOLCGi
Data2,LCGi=ρ2,LCGi*BOLCGi
其中,Data1,LCGi表示在当前调度子帧时刻,待调度UE的待调度上行LCG i在其可用的聚合载波CC1上的待传输数据量;Data2,LCGi表示在当前调度子帧时刻,待调度UE的待调度上行LCG i在其可用的聚合载波CC2上的待传输数据量;BOLCGi表示此待调度UE的待调度上行LCG i基站侧记录的缓存数据量。
实施例一:以配置了两个成员载波的CA系统为例介绍本申请实施例提供的基于各个聚合载波的传输能力进行并行调度的方法。
步骤一:收集、处理统计量。
假设统计周期时间长度为10ms,当前小区内有3个承载,LCG1、LCG2和LCG3,其中,LCG1属于UE1,LCG2和LCG3属于UE2。
在第2个统计周期时间内统计各上行LCG i在2个聚合载波CC上的总传输数据量分别是:
在CC1上,LCG1的传输数据量是400比特、LCG2的传输数据量是800比特、LCG3的传输数据量是1200比特。
在CC2上,LCG1的传输数据量是800比特、LCG2的传输数据量是1200比特、LCG3的传输数据量是400比特。
基于以上统计传输数据量,可以计算得出各上行LCGi第2个统计周期在2个聚合载波CC上的平均传输速率:
在CC1上,LCG1的平均传输速率是400/10=40kbps、LCG2的平均传输速率是800/10=80kbps、LCG3的平均传输速率是1200/10=120kbps。
在CC2上,LCG1的平均传输速率是800/10=80kbps、LCG2的平均传输速率是1200/10=120kbps、LCG3的平均传输速率是400/10=40kbps。
假设遗忘因子是1/4,第1个统计周期的平滑后得到的平滑值分别是:
在CC1上,LCG1的平均传输速率是80kbps、LCG2的平均传输速率是40kbps、LCG3的平均传输速率是80kbps。
在CC2上,LCG1的平均传输速率是40kbps、LCG2的平均传输速率是40kbps、LCG3
的平均传输速率是80kbps。
那么,第2个统计周期平滑后得到的平滑值分别是:
在CC1上,LCG1的平均传输速率是80*(1-1/4)+40*1/4=70kbps、LCG2的平均传输速率是40*(1-1/4)+80*1/4=50kbps、LCG3的平均传输速率是80*(1-1/4)+120*1/4=90kbps。
在CC2上,LCG1的平均传输速率是40*(1-1/4)+80*1/4=50kbps、LCG2的平均传输速率是40*(1-1/4)+120*1/4=60kbps、LCG3的平均传输速率是80*(1-1/4)+40*1/4=70kbps。
步骤二:确定聚合CC并行调度时每个UE的承载(LCG和/或RB)在其上待传输的数据量。
当前LCG1、LCG2、LCG3在2个聚合载波CC上的BO分配比例系数都是大于0的,则更新LCGi在2个CC上的BO分配比例系数:
在CC1上,LCG1的BO分配比例系数是70/(70+50)=0.583、LCG2的BO分配比例系数是50/(50+60)=0.455、LCG3的BO分配比例系数是90/(90+70)=0.563。
在CC2上,LCG1的BO分配比例系数是1-0.583=0.417、LCG2的BO分配比例系数是1-0.455=0.545、LCG3的BO分配比例系数是1-0.563=0.437。
那么,假设LCG1的当前BO缓存数据量是1000比特,LCG2的当前BO缓存数据量是2000比特,LCG3的当前BO缓存数据量是3000比特,则LCGi在2个可用聚合载波CC上的待传输数据量分别如下:
在CC1上,LCG1的待传输数据量是1000*0.583=583比特、LCG2的待传输数据量是2000*0.455=910比特、LCG3的待传输数据量是3000*0.563=1689比特。
在CC2上,LCG1的待传输数据量是1000*0.417=417比特、LCG2的待传输数据量是2000*0.545=1090比特、LCG3的待传输数据量是3000*0.437=1311比特。
方法二:基于各个聚合载波的负荷相等进行并行调度。
还以上行调度为例,具体流程包括:
步骤一:统计说明,包括统计量、统计方法和统计量计算公式。
周期统计如下描述统计量,假设统计周期时间长度为Tstatistic(单位ms),n表示第n个统计周期,在第n个统计周期时间Tstatistic内需要统计的统计量如下:
分别针对每一上行待调度UE进行统计,其中,对于任一UE j,统计UE j在CC1对应小区的实际PRB资源占用总个数Ncc1_UEj(n)和在CC2对应小区的实际PRB资源占用总个数Ncc2_UEj(n),单位为个;
分别针对每一上行待调度LCG进行统计,其中,对于任一LCG i,统计LCG i在CC1
上的总传输数据量Dcc1_LCGi(n)和在CC2上的总传输数据量Dcc2_LCGi(n),单位为比特bit。
当统计周期达到时,即统计定时器超时,基于以上统计量,可以计算得出下列第n个统计周期的统计量:
任一上行LCG i在2个聚合载波CC对应小区的上行频谱效率effCC1_LCGi(n)和effCC2_LCGi(n)的计算方法如下:
其中:
Rcc1_LCGi(n)和Rcc2_LCGi(n)分别表示上行LCG i在2个聚合载波CC上的平均传输速率,单位kbps,计算公式如下:
Pcc1_LCGi(n)和Pcc2_LCGi(n)分别表示上行LCG i在2个聚合载波CC对应小区的实际资源占用率,其计算公式如下:
其中,10表示一个LTE系统无线帧中总的子帧个数,NUL_subframe表示一个无线帧中的上行子帧个数,M1表示载波CC1的可用总带宽PRB个数,M2表示载波CC2的可用总带宽PRB个数。
NCC1_LCGi(n)和NCC2_LCGi(n)分别表示上行LCG i在2个聚合载波CC对应小区的实际占用资源PRB个数,其计算公式如下:
NCC1_UEj_LCG_NUM和NCC2_UEj_LCG_NUM分别表示在第n个统计周期内UEj在CC1和CC2参与调度传输的LCG个数。
对于以上直接统计得到的以及通过计算得到的各个统计量,按照遗忘因子滤波的方式进行平滑,得到平滑后的统计量,在具体的并行调度方法中使用。假设滤波的统计量为X,平滑值的计算方法如下:
X'(n)=(1-α)·X'(n-1)+α·X(n)
其中:X'(n)为统计量X经本次平滑后得到的平滑值;
X'(n-1)为统计量X经上一次平滑后得到的平滑值;
X(n)为本次统计周期内得到的统计量X的统计值;
α为遗忘因子,取值范围为{1,1/4,1/8,1/16,1/32,1/64,1/128,1/256},不限于于此,如果α取1,则表示不对统计值进行平滑处理。
步骤二:确定聚合CC并行调度时每个UE的承载(LCG和/或RB)在其上待传输的数据量。
每个聚合CC上待调度的上行LCG i的数据量就是基于该LCG i的BO缓存数据量和待传数据量分配比例系数最终确定。假设某个UE的上行LCG i在2个聚合载波CC上的待传数据量分配比例系数分别记为ρ1,LCGi和ρ2,LCGi,ρ1,LCGi表示该LCG i在载波CC1对应的待传数据量分配比例系数,ρ2,LCGi表示该LCG i在载波CC2对应的待传数据量分配比例系数。从UE的角度,该上行LCG i在其所属UE的PCell和SCell上的待传数据量分配比例系数分别记为ρPCell,LCGi和ρSCell,LCGi,则ρ1,LCGi=ρPCell,LCGi,ρ2,LCGi=ρSCell,LCGi;或者ρ1,LCGi=ρSCell,LCGi,ρ2,LCGi=ρPCell,LCGi。在调度子帧时刻,以UE的上行LCG i的缓存数据量乘以聚合载波CC对应的待传数据量分配比例系数,乘积即为当前该聚合载波CC上需要待传输的该UE对应上行承载LCG i的数据量。
以周期更新每个UE的每个上行LCG i在2个聚合载波CC上的待传数据量分配比例系数,假设更新周期时间长度为Tupdate。更新周期时间长度要求大于或等于前面描述的统计量统计周期时间长度,即Tupdate≥Tstatistic。该周期更新定时器可以是UE级的,也可以是小区级的。如果是UE级的,即在该UE激活SCell时启动该周期更新定时器,当周期更新定
时器超时,该UE按照如下方法执行对应承载在2个CC上的待传数据量分配比例系数更新判断操作;如果是小区级的,则在小区内第一个UE激活SCell时启动该周期更新定时器,当定时器超时,小区内所有激活了SCell的UE都按照如下方法执行对应承载在2个CC上的待传数据量分配比例系数更新判断操作。
待传数据量分配比例系数更新周期到达时,即定时器超时,为每个UE的每个上行LCG i在2个聚合载波CC上的待传数据量分配比例系数执行如下分配比例系数更新操作。
对于上行LCG i(LCG i为任一待调度UE的GBR LCG或者NGBR LCG),具体更新方案如下:
如果当前ρPCell,LCGi=1且ρSCell,LCGi=0,或者ρPCell,LCGi=0且ρSCell,LCGi=1,则对上行LCG i在2个CC上的BO分配比例系数不做调整。
否则,当前ρPCell,LCGi>0且ρSCell,LCGi>0,则根据当前第m个更新周期时刻,记录的经过第n个统计周期滤波平滑的最新上行LCG i在两个CC上实际的传输数据速率更新其在两个CC上的BO分配比例,并将该比例作为第m+1个更新周期时间内(即mTupdate~(m+1)Tupdate)在两个CC上分配BO的比例。即:
ρ2,LCGi(m)=1-ρ1,LCGi(m)
其中,eff'CC1_LCGi(n)表示经过第n个统计周期滤波平滑后的频谱效率,即对应前面步骤一解释的X'(n)。M1表示聚合载波CC1的带宽对应的可用PRB总个数,M2表示聚合载波CC2的带宽对应的可用PRB总个数。
确定该上行LCGi在每个可用聚合载波CC上的待传输数据量,方法如下:
Data1,LCGi=ρ1,LCGi*BOLCGi
Data2,LCGi=ρ2,LCGi*BOLCGi
其中,Data1,LCGi和Data2,LCGi分别表示当前调度子帧时刻,待调度UE的待调度上行LCG i在其可用的聚合载波CC1和CC2上的待传输数据量;BOLCGi表示此待调度UE的待调度上行LCG i基站侧记录的缓存数据量。
实施例二:以配置了两个成员载波的CA系统为例介绍本申请的基于各个聚合载波的负荷相等进行并行调度方法。
步骤一:收集、处理统计量。
假设统计周期时间长度为10ms,当前小区内有3个承载,LCG1、LCG2和LCG3,其中,LCG1属于UE1,LCG2和LCG3属于UE2。2个聚合载波的系统带宽分别是CC1对应10M,50个PRB;CC2对应20M,100个PRB。系统无线帧结构配置0,即3U2D。
在第2个统计周期时间内统计各上行UE j在2个聚合载波CC对应小区的实际资源占用总个数分别是:
在CC1上,UE1的实际资源占用总个数是40个、UE2的实际资源占用总个数是200个。
在CC2上,UE1的实际资源占用总个数是80个、UE2的实际资源占用总个数是160个。
在第2个统计周期时间内统计各上行LCG i在2个聚合载波CC上的总传输数据量分别是:
在CC1上,LCG1的传输数据量是400比特、LCG2的传输数据量是800比特、LCG3的传输数据量是1200比特。
在CC2上,LCG1的传输数据量是800比特、LCG2的传输数据量是1200比特、LCG3的传输数据量是400比特。
基于以上统计传输数据量,可以计算得出各上行LCGi第2个统计周期在2个聚合载波CC上的平均传输速率:
在CC1上,LCG1的平均传输速率是400/10=40kbps、LCG2的平均传输速率是800/10=80kbps、LCG3的平均传输速率是1200/10=120kbps。
在CC2上,LCG1的平均传输速率是800/10=80kbps、LCG2的平均传输速率是1200/10=120kbps、LCG3的平均传输速率是400/10=40kbps。
基于以上统计实际资源占用总个数,可以计算得出各LCGi第2个统计周期在2个聚合载波CC对应小区的实际资源占用率:
在CC1上,LCG1的实际资源占用率是40*(10/10*6*50)=0.133、LCG2的实际资源占用率是[200*(800/(800+1200))]/(10/10*6*50)=0.267、LCG3的实际资源占用率是[200*(1200/(800+1200))]/(10/10*6*50)=0.4。
在CC2上,LCG1的实际资源占用率是80*(10/10*6*100)=0.133、LCG2的实际资源占用率是[160*(1200/(1200+400))]/(10/10*6*100)=0.2、LCG3的实际资源占用率是[160*(400/(1200+400))]/(10/10*6*100)=0.067。
基于以上计算结果,可以计算得出各上行LCGi在第2个统计周期在2个聚合载波CC
对应小区的上行频谱效率:
在CC1上,LCG1的上行频谱效率是40/0.133/1000=0.301kbps/Hz、LCG2的上行频谱效率是80/0.267/1000=0.3kbps/Hz、LCG3的上行频谱效率是120/0.4/1000=0.3kbps/Hz。
在CC2上,LCG1的上行频谱效率是80/0.133/1000=0.602kbps/Hz、LCG2的上行频谱效率是120/0.2/1000=0.6kbps/Hz、LCG3的上行频谱效率是40/0.067/1000=0.597kbps/Hz。
假设遗忘因子是1/4,第1个统计周期的平滑后得到的平滑值分别是:
在CC1上,LCG1的上行频谱效率是0.6kbps/Hz、LCG2的上行频谱效率是0.8kbps/Hz、LCG3的上行频谱效率是0.7kbps/Hz。
在CC2上,LCG1的上行频谱效率是0.8kbps/Hz、LCG2的上行频谱效率是0.7kbps/Hz、LCG3的上行频谱效率是0.6kbps/Hz。
那么,第2个统计周期平滑后得到的平滑值分别是:
在CC1上,LCG1的上行频谱效率是0.6*(1-1/4)+0.301*1/4=0.525kbps/Hz、LCG2的上行频谱效率是0.8*(1-1/4)+0.3*1/4=0.675kbps/Hz、LCG3的上行频谱效率是0.7*(1-1/4)+0.3*1/4=0.6kbps/Hz。
在CC2上,LCG1的上行频谱效率是0.8*(1-1/4)+0.602*1/4=0.751kbps/Hz、LCG2的上行频谱效率是0.7*(1-1/4)+0.6*1/4=0.675kbps/Hz、LCG3的上行频谱效率是0.6*(1-1/4)+0.597*1/4=0.599kbps/Hz。
步骤二:确定聚合CC并行调度时每个UE的承载(LCG和/或RB)在其上待传输的数据量。
当前LCG1、LCG2、LCG3在2个聚合载波CC上的BO分配比例系数都是大于0的,则更新LCGi在2个CC上的BO分配比例系数:
在CC1上,LCG1的BO分配比例系数是0.525*50/(0.525*50+0.751*100)=0.259、LCG2的BO分配比例系数是0.675*50/(0.675*50+0.675*100)=0.333、LCG3的BO分配比例系数是0.6*50/(0.6*50+0.599*100)=0.334。
在CC2上,LCG1的BO分配比例系数是1-0.259=0.741、LCG2的BO分配比例系数是1-0.455=0.667、LCG3的BO分配比例系数是1-0.563=0.666。
那么,假设LCG1的当前BO缓存数据量是1000比特,LCG2的当前BO缓存数据量是2000比特,LCG3的当前BO缓存数据量是3000比特,则LCGi在2个可用聚合载波CC上的待传输数据量分别如下:
在CC1上,LCG1的待传输数据量是1000*0.259=259比特、LCG2的待传输数据量是2000*0.333=666比特、LCG3的待传输数据量是3000*0.334=1002比特。
在CC2上,LCG1的待传输数据量是1000*0.741=741比特、LCG2的待传输数据量是2000*0.667=1334比特、LCG3的待传输数据量是3000*0.666=1998比特。
简化方法:同时适用于上述方法一和方法二。
针对方法一和方法二中该上行LCGi在每个可用聚合载波CC上的待传输数据量,还可以采用两种更简便的方法。
简化方法一:UE级更新BO分配比例系数。
在上述方法一或者方法二中的计算过程中,以UE粒度分别统计其在每个可用聚合载波CC上的传输数据量、占用PRB个数,以此替代公式中的单个LCG统计计算,即同属于一个UE的所有LCG,在一个BO分配比例系数更新周期内,对应2个CC上的待传数据量分配比例系数都是相同的,即UE级BO分配比例系数,ρ1,LCGi(n)=ρ1,LCGj(n),ρ2,LCGi(n)=ρ2,LCGj(n),LCGi和LCGj属于同一个UE。
简化方法二:小区级更新BO分配比例系数。
在上述方法一或者方法二中的计算过程中,以小区粒度分别统计其在每个可用聚合载波CC上的传输数据量、占用PRB个数,以此替代公式中的单个LCG统计计算,即同属于一个小区内的所有LCG,在一个BO分配比例系数更新周期内,对应2个CC上的待传数据量分配比例系数都是相同的,即小区级BO分配比例系数,ρ1,LCGi(n)=ρ1,LCGj(n),ρ2,LCGi(n)=ρ2,LCGj(n),LCGi和LCGj属于同一个小区。
以上举例的是针对上行业务的载波聚合并行调度方法,对于下行业务的载波聚合并行调度方法,与上行类似。区别仅在于,统计量需要替换成针对UE下行承载的实际传输数据量、实际占用资源PRB个数,进而计算得出UE下行承载的实际传输数据速率、频谱效率,对应的是下行承载RB i。同时,上行LCG i的PBR替换成下行RB i的最小比特速率(Minimum Bit Rate,MinBR)。
参见图3,本申请实施例提供的一种载波聚合场景下的成员载波调度装置,包括:
第一单元11,用于确定需要调度载波聚合场景下的成员载波;
第二单元12,用于针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量。
可选的,第二单元还用于:按照第一周期进行周期性更新每一待调度承载在任一成员载波上的待传输数据量分配比例系数。
可选的,第二单元按照如下方式对每一待调度承载在任一成员载波上的待传输数据
量分配比例系数进行周期性更新:
针对每一待调度承载:
按照第一周期,利用按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到的最新统计结果,对该待调度承载在每一成员载波上的待传输数据量分配比例系数进行周期性更新。
可选的,第二单元针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波上的平均传输速率;
对于每一成员载波,将该待调度承载在该成员载波上的平均传输速率或平滑后的平均传输速率,作为该待调度承载在该成员载波上的统计结果。
可选的,第二单元针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率;
对于每一成员载波,将该待调度承载在该成员载波对应小区的频谱效率或平滑后的频谱效率,作为该待调度承载在该成员载波上的统计结果。
可选的,第二单元按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率时,具体用于:
针对每一待调度承载:
按照第二周期,统计该待调度承载在每一成员载波上的总传输数据量,并根据该待调度承载在每一成员载波上的总传输数据量,确定该待调度承载在每一成员载波上的数据传输速率;
确定该待调度承载在每一成员载波对应小区的PRB实际占用个数,并根据该PRB实际占用个数确定该待调度承载在每一成员载波对应小区的实际资源占用率。
可选的,第二单元还用于:按照第二周期,针对每一需要调度的UE,统计该UE在每一成员载波对应小区的物理资源块PRB占用总个数;
第二单元针对任一待调度承载i,采用如下公式确定该待调度承载i在任一成员载波CCq对应小区的PRB实际占用个数:
其中,NCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq对应小区的PRB实际占用个数,NCCq_UEj(n)表示在最近一次统计的第n个第二周期内任一需要调度的UEj在成员载波CCq对应小区的PRB占用总个数,DCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq上的总传输数据量,NCCq_UEj_承载_NUM表示在最近一次统计的第n个第二周期内UEj在CCq参与调度传输的承载个数,其中i、j、n、q均为任意自然数。
可选的,同属于一个UE的每一待调度承载,在任一第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
可选的,同属于一个小区内的每一待调度承载,在任一第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
以上的第一单元,可以是上述图1所示的调度CC选择模块,的第二单元,可以包括上述图1所示的各个CC资源调度模块。
总之,本申请实施例提供的载波聚合场景下的成员载波的并行调度装置中,第二单元还可以细化为包含统计单元、BO分配比例系数更新单元、合CC并行调度待传数据量确定单元等单元,统计单元负责周期性统计UE承载(LCG和/或RB)的传输数据量、实际占用资源PRB个数,并由这些信息计算出UE承载(LCG和/或RB)的实际传输数据速率、频谱效率。聚合CC并行调度待传数据量确定单元,周期性的判断更新UE承载(LCG和/或RB)在其可用的聚合载波CC上的BO分配比例系数,确定聚合CC并行调度时每个UE的承载(LCG和/或RB)在其上待传输的数据量。
参见图4,本申请实施例提供的另一载波聚合场景下的成员载波调度装置,包括:
处理器500,用于读取存储器520中的程序,执行下列过程:
确定需要调度载波聚合场景下的成员载波;
针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量。
可选的,处理器500还用于:按照第一周期进行周期性更新每一待调度承载在任一成员载波上的待传输数据量分配比例系数。
可选的,处理器500按照如下方式对每一待调度承载在任一成员载波上的待传输数据量分配比例系数进行周期性更新:
针对每一待调度承载:
按照第一周期,利用按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到的最新统计结果,对该待调度承载在每一成员载波上的待传输数据量分配比例系数进行周期性更新。
可选的,处理器500针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波上的平均传输速率;
对于每一成员载波,将该待调度承载在该成员载波上的平均传输速率或平滑后的平均传输速率,作为该待调度承载在该成员载波上的统计结果。
可选的,处理器500针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:
针对每一待调度承载:
按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率;
对于每一成员载波,将该待调度承载在该成员载波对应小区的频谱效率或平滑后的频谱效率,作为该待调度承载在该成员载波上的统计结果。
可选的,处理器500按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率时,具体用于:
针对每一待调度承载:
按照第二周期,统计该待调度承载在每一成员载波上的总传输数据量,并根据该待调度承载在每一成员载波上的总传输数据量,确定该待调度承载在每一成员载波上的数据传输速率;
确定该待调度承载在每一成员载波对应小区的PRB实际占用个数,并根据该PRB实际占用个数确定该待调度承载在每一成员载波对应小区的实际资源占用率。
可选的,处理器500还用于:按照第二周期,针对每一需要调度的UE,统计该UE在每一成员载波对应小区的物理资源块PRB占用总个数;
第二单元针对任一待调度承载i,采用如下公式确定该待调度承载i在任一成员载波CCq对应小区的PRB实际占用个数:
其中,NCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波
CCq对应小区的PRB实际占用个数,NCCq_UEj(n)表示在最近一次统计的第n个第二周期内任一需要调度的UEj在成员载波CCq对应小区的PRB占用总个数,DCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq上的总传输数据量,NCCq_UEj_承载_NUM表示在最近一次统计的第n个第二周期内UEj在CCq参与调度传输的承载个数,其中i、j、n、q均为任意自然数。
可选的,同属于一个UE的每一待调度承载,在任一第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
或者,同属于一个小区内的每一待调度承载,在任一第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
收发机510,用于在处理器500的控制下接收和发送数据。
其中,在图4中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器500代表的一个或多个处理器和存储器520代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机510可以是多个元件,即包括发送机和收发机,提供用于在传输介质上与各种其他装置通信的单元。处理器500负责管理总线架构和通常的处理,存储器520可以存储处理器500在执行操作时所使用的数据。
综上,本申请实施例提供的载波聚合的并行调度方法,包括上行和下行。该方法通过周期统计(滤波)的统计量,确定聚合CC并行调度时每个UE的承载(LCG和/或RB)在其上待传输的数据量,使一个调度子帧时刻,可以同时执行多个聚合载波CC的资源分配。通过周期统计结果,周期触发更新激活了SCell的UE的承载(LCG和/或RB)在其可用的聚合载波CC上的BO分配比例系数,进而实现一个调度子帧时刻,可以同时执行多个聚合载波CC的资源分配。与现有调度方法相比,一方面能有效的降低多载波聚合调度在产品实现中对硬件处理能力的要求,另一方面,也能在保证系统性能的基础上,更快捷的同时完成多个聚合载波的资源分配和调度,达到快速调整各个载波资源的目的。其中,方法一提出了一种基于各个聚合载波的传输能力进行并行调度方法,其优势在于最大的提升系统吞吐量;方法二提出了一种基于各个聚合载波的负荷相等进行并行调度方法,其优势在于通过调度实现了聚合载波之间的快速负荷均衡。两种简化的方法,大大减少了计算量,有利于产品实现后提升计算效率。
显然,本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和
范围。这样,倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。
Claims (18)
- 一种载波聚合场景下的成员载波调度方法,其特征在于,该方法包括:确定需要调度载波聚合场景下的成员载波;针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量。
- 根据权利要求1所述的方法,其特征在于,每一待调度承载在任一成员载波上的待传输数据量分配比例系数,是按照第一周期进行周期性更新的。
- 根据权利要求2所述的方法,其特征在于,每一待调度承载在任一成员载波上的待传输数据量分配比例系数,按照如下方式进行周期性更新:针对每一待调度承载:按照第一周期,利用按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到的最新统计结果,对该待调度承载在每一成员载波上的待传输数据量分配比例系数进行周期性更新。
- 根据权利要求3所述的方法,其特征在于,针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:针对每一待调度承载:按照第二周期统计该待调度承载在每一成员载波上的平均传输速率;对于每一成员载波,将该待调度承载在该成员载波上的平均传输速率或平滑后的平均传输速率,作为该待调度承载在该成员载波上的统计结果。
- 根据权利要求3所述的方法,其特征在于,针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:针对每一待调度承载:按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率;对于每一成员载波,将该待调度承载在该成员载波对应小区的频谱效率或平滑后的频谱效率,作为该待调度承载在该成员载波上的统计结果。
- 根据权利要求5所述的方法,其特征在于,按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率,包括:针对每一待调度承载:按照第二周期,统计该待调度承载在每一成员载波上的总传输数据量,并根据该待调度承载在每一成员载波上的总传输数据量,确定该待调度承载在每一成员载波上的数据传 输速率;确定该待调度承载在每一成员载波对应小区的PRB实际占用个数,并根据该PRB实际占用个数确定该待调度承载在每一成员载波对应小区的实际资源占用率。
- 根据权利要求6所述的方法,其特征在于,该方法还包括:按照第二周期,针对每一需要调度的UE,统计该UE在每一成员载波对应小区的物理资源块PRB占用总个数;针对任一待调度承载i,采用如下公式确定该待调度承载i在任一成员载波CCq对应小区的PRB实际占用个数:其中,NCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq对应小区的PRB实际占用个数,NCCq_UEj(n)表示在最近一次统计的第n个第二周期内任一所述需要调度的UEj在成员载波CCq对应小区的PRB占用总个数,DCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq上的总传输数据量,NCCq_UEj_承载_NUM表示在最近一次统计的第n个第二周期内UEj在CCq参与调度传输的承载个数,其中i、j、n、q均为任意自然数。
- 根据权利要求2所述的方法,其特征在于,同属于一个UE的每一待调度承载,在任一所述第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
- 根据权利要求2所述的方法,其特征在于,同属于一个小区内的每一待调度承载,在任一所述第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
- 一种载波聚合场景下的成员载波调度装置,其特征在于,该装置包括:第一单元,用于确定需要调度载波聚合场景下的成员载波;第二单元,用于针对每一成员载波:确定该成员载波上待调度用户设备UE的待调度承载列表,并且,针对每一待调度承载,按照该待调度承载的缓存数据量和在该成员载波上的待传输数据量分配比例系数,确定待调度承载在该成员载波上的待传输数据量。
- 根据权利要求10所述的装置,其特征在于,所述第二单元还用于:按照第一周期进行周期性更新每一待调度承载在任一成员载波上的待传输数据量分配比例系数。
- 根据权利要求11所述的装置,其特征在于,所述第二单元按照如下方式对每一待调度承载在任一成员载波上的待传输数据量分配比例系数进行周期性更新:针对每一待调度承载:按照第一周期,利用按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到的最新统计结果,对该待调度承载在每一成员载波上的待传输数据量分配比例系数进行周期性更新。
- 根据权利要求12所述的装置,其特征在于,所述第二单元针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:针对每一待调度承载:按照第二周期统计该待调度承载在每一成员载波上的平均传输速率;对于每一成员载波,将该待调度承载在该成员载波上的平均传输速率或平滑后的平均传输速率,作为该待调度承载在该成员载波上的统计结果。
- 根据权利要求12所述的装置,其特征在于,所述第二单元针对每一待调度承载,采用如下方式,按照第二周期对该待调度承载在每一成员载波上的统计量进行周期性统计得到统计结果:针对每一待调度承载:按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率;对于每一成员载波,将该待调度承载在该成员载波对应小区的频谱效率或平滑后的频谱效率,作为该待调度承载在该成员载波上的统计结果。
- 根据权利要求14所述的装置,其特征在于,所述第二单元按照第二周期统计该待调度承载在每一成员载波对应小区的频谱效率时,具体用于:针对每一待调度承载:按照第二周期,统计该待调度承载在每一成员载波上的总传输数据量,并根据该待调度承载在每一成员载波上的总传输数据量,确定该待调度承载在每一成员载波上的数据传输速率;确定该待调度承载在每一成员载波对应小区的PRB实际占用个数,并根据该PRB实际占用个数确定该待调度承载在每一成员载波对应小区的实际资源占用率。
- 根据权利要求15所述的装置,其特征在于,所述第二单元还用于:按照第二周期,针对每一需要调度的UE,统计该UE在每一成员载波对应小区的物理资源块PRB占用总个数;所述第二单元针对任一待调度承载i,采用如下公式确定该待调度承载i在任一成员载波CCq对应小区的PRB实际占用个数:其中,NCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq对应小区的PRB实际占用个数,NCCq_UEj(n)表示在最近一次统计的第n个第二周期内任一所述需要调度的UEj在成员载波CCq对应小区的PRB占用总个数,DCCq_承载i(n)表示在最近一次统计的第n个第二周期内待调度承载i在成员载波CCq上的总传输数据量,NCCq_UEj_承载_NUM表示在最近一次统计的第n个第二周期内UEj在CCq参与调度传输的承载个数,其中i、j、n、q均为任意自然数。
- 根据权利要求11所述的装置,其特征在于,同属于一个UE的每一待调度承载,在任一所述第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。
- 根据权利要求11所述的装置,其特征在于,同属于一个小区内的每一待调度承载,在任一所述第一周期内,在同一成员载波上的待传输数据量分配比例系数相同。。
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