CN106954265B - Method and device for splitting data packet and evolved node - Google Patents
Method and device for splitting data packet and evolved node Download PDFInfo
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- H04W72/04—Wireless resource allocation
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- 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
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- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses a method, a device and an evolution node for splitting a data packet, which are applied to the technical field of carrier aggregation, wherein when a User Equipment (UE) accesses a policy control and charging control (PCC) or a power cell (Pcell) and has a control component (SCC) or a power cell (Scell), the method comprises the following steps: determining the rate proportion of the current UE on different cells/carriers in the last time or time period; and splitting a data packet to be scheduled by the UE in the next moment or time period according to the ratio of the rates of the current UE in different cells/carriers in the previous moment or time period.
Description
Technical Field
The invention relates to the technical field of Carrier Aggregation (CA) in an LTE-A (Long Term Evolution-Advanced) system, in particular to the splitting of a data packet.
Background
LTE-a is an LTE (Long Term Evolution) subsequent Evolution technical standard proposed by 3GPP to meet the requirements of International Telecommunications Union (ITU) for International Mobile telecommunications Union (International telecommunications Union), where LTE-a can support a system bandwidth of 100MHz at maximum, a downlink peak rate exceeds 1Gbps, and an uplink peak rate reaches 500Mbps. The LTE-a system design not only needs to meet performance requirements, but also considers better backward compatibility for LTE to reduce the cost of operator network upgrade.
LTE-a currently supports a maximum bandwidth of 100MHz in order to meet peak rate requirements, however, such a large bandwidth is difficult to find in the existing available spectrum resources, and the large bandwidth brings great difficulty to the hardware design of the base station and the terminal. In addition, there is a need for a technique to fully utilize spectrum resources scattered over multiple frequency bands. Based on the above considerations, LTE-a introduces a key technology of carrier aggregation.
The basic method of Carrier aggregation is to divide a continuous spectrum or a plurality of discrete spectra into a plurality of Component Carriers (CC). A User Equipment (UE) supporting carrier aggregation may aggregate multiple component carriers and may simultaneously use PRB (Physical Resource Block) resources on all the aggregated component carriers. The number of the aggregated component carriers is at most 5, and each component carrier is at most 20MHz; these member carrier frequencies may be either immediately adjacent or spaced apart.
In a carrier aggregation scenario, an Evolved Node B (eNB) aggregates 2 or more carriers together, and issues a Radio Resource Control (RRC) reconfiguration message to a UE, so that the UE can use the aggregated carriers to perform service transmission. Wherein, a carrier maintaining RRC connection with the UE is referred to as a Primary Carrier Component (PCC), and a corresponding Cell is referred to as a Primary Cell (Pcell); carriers other than the primary carrier among the carriers aggregated by the UE are referred to as Secondary carriers (SCCs), and a corresponding Cell is referred to as a Secondary Cell (Scell). For the UE supporting CA, the primary carrier and the primary cell are always activated, the secondary carrier and the secondary cell are deactivated by default and need to be activated before use, and the secondary carrier and the secondary cell can be activated by the activated carrier and cell; similarly, the secondary carrier may also be deactivated by the activated carrier and the cell.
Since a PDCCH (Physical downlink control channel)/PDSCH (Physical downlink shared channel)/PUSCH (Physical uplink shared channel) of the PCC is on the PCC, while a PDCCH/PDSCH/PUSCH of the SCC may be on a different CC. However, the information of the size of the uplink and downlink data packets is only notified to the primary carrier, and the activated secondary carrier cannot receive the information of the size of the data packets, so that the following problems that need to be solved in the prior art also exist in the scenario of carrier aggregation: when the secondary carrier or the secondary cell is activated, the eNB needs to schedule and allocate resources of each carrier or cell, and when there is a data packet to be sent, the eNB needs to split the data packet between different carriers or cells.
Currently, the research on the packet splitting technology in this scenario is still blank.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, and an evolved node for splitting a data packet, so as to fill a blank of a data packet splitting technology under a carrier aggregation function, fully utilize resources of different carriers or cells, reduce waste of the carrier or cell resources, and maximize a scheduling rate and a service experience of a user.
On one hand, the present invention discloses a method for packet splitting in the technical field of carrier aggregation, and when a UE accesses a PCC or Pcell and has an SCC or Scell also activated, the method is as shown in fig. 1, and includes the following steps:
s101, an eNB determines the rate proportion of the current UE on different cells/carriers within the last time or time period;
s102, the eNB splits a data packet to be scheduled by the UE in the next time or time period according to the rate proportion of the current UE in the previous time or time period on different cells/carriers.
And for the residual resources which are not scheduled on the aggregated cells or carriers after the splitting, the eNB allocates the residual resources to the UE aggregated on the cell or carrier.
Wherein the ratio of the rates may be a ratio of corrected rates.
As shown in fig. 2, the eNB may split the data packets to be scheduled by the current UE at a fixed ratio before the eNB determines the ratio of the rates of the current UE on different cells/carriers within the last time or time period.
On the other hand, the present invention discloses a device for packet splitting applied to carrier aggregation technology, as shown in fig. 3, the device includes:
a rate ratio determining module, configured to determine a ratio of rates of the current UE on different cells/carriers at a previous time or within a time period;
and the data packet splitting module is used for splitting the data packet to be scheduled by the UE at the next moment or in the time period according to the ratio of the rates of the current UE at different cells/carriers at the previous moment or in the time period.
As shown in fig. 4, the apparatus further includes a packet initial splitting module, configured to split a packet to be scheduled by the current UE in a fixed ratio
Further, as shown in fig. 5, the apparatus further includes a reallocation module, configured to, for remaining resources that are not scheduled on the aggregated cells/carriers after the splitting, allocate the remaining resources to the UE aggregated in the cell or carrier by the eNB.
Meanwhile, the invention discloses a data packet splitting evolution type node, which comprises the data packet splitting device as shown in figure 6.
The method, the device and the evolution node for splitting the data packet disclosed by the invention are used for filling the splitting of the data packet under the carrier aggregation function, fully utilizing the resources of different carriers or cells, reducing the waste of the resources of the carriers or the cells and maximally improving the scheduling rate and the service experience of a user.
Drawings
Fig. 1 is a schematic flow chart of a method for packet splitting according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another method for packet splitting according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an apparatus for splitting a packet according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a second packet splitting apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a third apparatus for packet splitting according to an embodiment of the present invention;
fig. 6 is a diagram of an enodeb with a packet splitting function according to an embodiment of the present invention.
Detailed Description
In a data packet splitting scheme disclosed by the invention, when a UE accesses a PCC or a Pcell and an SCC or the Scell is also activated, an eNB determines the ratio of the rates of the current UE on different cells/carriers in the last time or time period, and then splits a data packet to be scheduled by the UE in the next time or time period according to the ratio of the rates of the current UE on different cells/carriers in the last time or time period. The eNB may split the data packets to be scheduled by the current UE at a fixed ratio before determining the ratio of the rates on different cells/carriers within the last time or time period of the current UE.
For the remaining resources that are not scheduled on the split aggregated cell or carrier, the eNB may allocate the remaining resources to the UE aggregated in the cell or carrier according to a fixed ratio.
The method, the device and the evolution node for splitting the data packet disclosed by the invention are used for filling the blank in the technical field of splitting the data packet under the carrier aggregation function, fully utilizing the resources of different carriers or cells, reducing the waste of the resources of the carriers or the cells and maximally improving the scheduling rate and the service experience of a user.
The main implementation principle, the specific implementation mode and the achievable benefits of the technical scheme disclosed by the invention are explained in detail in the following with the help of the attached drawings.
Example one
The embodiment of the invention provides a method for splitting a data packet, which comprises the following steps:
when the UE accesses the PCC or Pcell and has the SCC or Scell activated, the eNB splits a data packet to be scheduled by the UE in a fixed ratio. And for the residual resources which are not scheduled on the aggregated cell or carrier after the splitting, the eNB distributes the residual resources to the UE aggregated on the cell or carrier according to a certain proportion.
The technical solution is further explained with reference to examples.
Example 1: and the UE with the UE Index =10 is initially accessed to activate two carriers, the size of a first data packet reported after the UE is accessed to the cell is 5000bits, and the sizes of the data packets are equally divided by the two carriers, wherein the sizes of the data packets are 2500bits respectively.
Example 2: the UE with the UE Index =10 initially accesses and activates three carriers, the size of a first data packet reported after the UE accesses a cell is 6000bits, and an eNB divides a data packet to be scheduled of the UE among the three aggregated carriers according to the proportion of 1; one carrier is divided into 1200bits, two carriers are divided into 2400bits, and three carriers are divided into 1200bits. The aggregated carrier 3 after splitting has the remaining resource which is not scheduled, and the eNB distributes the remaining resource on the carrier 3 to all UEs aggregated on the carrier.
Example two
The second embodiment of the present invention provides a method for splitting a data packet, where the method includes the following steps:
when the UE accesses the PCC or the Pcell and the SCC or the Scell is also activated, the eNB determines the ratio of the rates of the current UE on different cells/carriers in the last time or time period, and then splits the data packet to be scheduled of the UE in the next time or time period according to the ratio of the rates of the current UE on different cells/carriers in the last time or time period. The eNB may split the data packets to be scheduled by the current UE at a fixed ratio before determining the ratio of the rates on different cells/carriers at the last time or within a time period.
Wherein the ratio of the rates may be a ratio of corrected rates.
And for the residual resources which are not scheduled on the aggregated cells or carriers after the splitting, the eNB allocates the residual resources to the UE aggregated on the cell or carrier.
The eNB determines a ratio of average rates of the current UE on different cells/carriers at a previous time or in a previous time period, which specifically includes: the eNB firstly determines the scheduling capability of the UE on each cell/carrier, wherein the scheduling capability comprises the channel quality of the UE, the occupied scheduling resource and the scheduling times; and the eNB determines the rate of the UE on the cell/carrier according to the channel quality of the UE, the occupied scheduling resource and the scheduling times, and finally determines the proportion of the rates of the UE on different cells/carriers according to the rates of the cells/carriers.
If the channel quality scheduled by the UE at the previous moment on a certain cell/carrier is M and the occupied resource is N, the number of bits that the UE has been scheduled for the last time is X according to the protocol, and then, in combination with the scheduling frequency Y counted by the UE within the last 1s on the cell/carrier, the rate of the UE on the cell/carrier is Z = X × Y bit/s, and similarly, the rate of the UE on other cells/carriers Zn bit/s can be determined, where N represents the number of the cell/carrier. And finally, determining the rate ratio according to the rates of the UE on different cells/carriers.
If the average channel quality of the UE in a previous time period on a certain cell/carrier is M and the average occupied resource is N, the average number of bits per scheduling of the UE in the previous time period is X according to a protocol, and then, in combination with the scheduling times Y counted by the UE in the previous time period on the cell/carrier, the rate of the UE on the cell/carrier can be determined, where the scheduling times Y counted in a time period needs to be converted into the scheduling times Y 'of the UE in 1s, and then, the average rate of the UE on the cell/carrier is Z = X × Y' bits/s. Similarly, the average rate Zn bit/s of the UE on other cells/carriers can be calculated, where n represents the number of the cell/carrier. And finally, determining the ratio of the average rates according to the average rates of the UE on different cells/carriers.
If there are remaining resources on a certain cell/carrier that are not scheduled, these remaining resources are allocated to the scheduled UE.
The technical solution is further explained with reference to examples.
Example 1, UE initial access for UE index =10, two carriers are activated:
step 1, an eNB carries out balanced splitting on a data packet to be scheduled of the UE among 2 carriers;
step 2, the eNB determines the proportion of the average rate of the current UE on different cells/carriers at the last moment;
the channel quality of the Ue at the last time on carrier 1 is 22, and the occupied resource is 32, then according to the protocol, the number of bits that the Ue has scheduled for the last time is 14688 bits, and the number of scheduling times 2 of the Ue in the last 1s on the carrier can determine that the rate of the Ue on carrier 1 is 14688 × 2=29376 bits/s.
The channel quality of the Ue at the last time on the carrier 2 is 16, and the occupied resource is 40, then according to the protocol, the number of bits that the Ue has scheduled for the last time is 12216 bits, and the number of times 3 that the Ue has scheduled on the carrier within the last 1s can determine that the rate of the Ue on the carrier 2 is 12216 × 3=36648bits/s.
The ratio of the UE rates on carrier 1 to carrier 2 is 29376:36648=1:1.25.
and 3, when the next data packet to be scheduled arrives, the eNB performs the following steps according to the step 1: a ratio of 1.25 splits the packet to be scheduled between carrier 1 and carrier 2.
Example 2, UE initial access for UE index =10, two carriers are activated:
step 1, an eNB splits a data packet to be scheduled of the UE among 2 carriers;
step 2, the eNB determines the proportion of the average rates of the current UE on different cells/carriers in the last time period;
the average channel quality of Ue in the last time period of carrier 1 is 24, the average occupied resource is 40, then according to the protocol, it can be obtained that the average bit number of the Ue in the last time period of each scheduling is 21384bits, the number of times of scheduling of the Ue in the last time period of the carrier is 10, the number of times of scheduling of the Ue in the time period is reduced to 10 × 2=20 in 1s, and finally the average rate of the Ue on the carrier is 21384 × 20=427680bits/s.
The average channel quality of Ue in the last time period of carrier 2 is 10, and the average occupied resource is 20, then according to the protocol, it can be obtained that the average bit number of the Ue scheduled in the last time period is 3112bits, the statistical scheduling time of the Ue in the last time period of the carrier is 30, the statistical scheduling time in the time period is reduced to 30 × 2=60 of the Ue in 1s, and finally, the average rate of the Ue on the carrier is 3112 × 60= 1867272bits/s.
The ratio of the UE rates on carrier 1 to carrier 2 is 427680:186720=2.29:1.
and 3, when the eNB comes in a scheduling period, according to the step 1: a ratio of 1.25 splits the data packets to be scheduled between carrier 1 and carrier 2.
Example 3, UE initial access of UE index =10, activating two carriers, as shown in fig. 3, comprising the following steps:
step 1, eNB enables the data packet to be scheduled of the UE to be divided into 2 carriers according to the ratio of 1:2, splitting;
step 2, the eNB determines the proportion of the average speed of the current UE on different cells/carriers in the last time period;
if the average channel quality of Ue in the latest rate splitting period on carrier 1 is 10 and the average occupied resource is 40, then according to the protocol, the average number of bits scheduled by the Ue in the latest rate splitting period is 6200bits, the number of scheduling times counted by the Ue in the latest rate splitting period on the carrier is 10, the number of scheduling times counted in the rate splitting period is reduced to 10 × 5=50 for the Ue in 1s, and finally the average rate of the Ue on the carrier is 6200 × 50=310000bits/s.
The average channel quality of Ue in the latest rate splitting period on carrier 2 is 10, the average occupied resource is 20, the average resource residue of 10 RBs on the carrier in the statistical period is counted, and if there are 5 scheduling UEs on the carrier in the statistical period, the average occupied resource of Ue is updated as follows: 20+10/5=22, then according to the protocol, the average bit number of each scheduling in the latest rate splitting period of the UE is 3496bits, the number of times of scheduling of the UE in the latest rate splitting period on the carrier is 40, the number of times of scheduling of the UE in the latest rate splitting period is reduced to 40 + 5=200 in 1s, and finally the average rate of the UE on the carrier is 3496 + 200=699200bits/s.
The ratio of the UE rates on carrier 1 and carrier 2 is 310000:699200=1:2.26.
step 3, eNB corrects the ratio of the rates on carrier 1 and carrier 2, since in the initial state eNB puts the data packet to be scheduled for the UE between 2 carriers in a ratio of 1:2, so the ratio of the corrected carrier 1 to the rate on carrier 2 is (1 + 1): (2 + 2.26) = 2.26;
and 4, when a next scheduling period comes, the eNB splits the data packet to be scheduled between the carrier 1 and the carrier 2 according to the corrected average rate ratio 2.
Example three:
the third embodiment of the invention provides a device for splitting a data packet:
the apparatus shown in fig. 3 comprises: a rate ratio determining module, configured to determine a ratio of rates of the current UE on different cells/carriers at a previous time or within a time period; and the data packet splitting module is used for splitting the data packet to be scheduled by the UE at the next moment or in the time period according to the ratio of the rates of the current UE at different cells/carriers at the previous moment or in the time period.
As shown in fig. 4, the apparatus further includes a packet initial splitting module, configured to split a packet to be scheduled by the current UE in a fixed ratio
Further, as shown in fig. 5, the apparatus further includes a module for allocating, by the eNB, to UEs aggregated in the cell or carrier, the remaining resources that are not scheduled on the aggregated cell/carrier after the splitting.
Example four:
a fourth embodiment of the present invention provides an evolved node for packet splitting, as shown in fig. 6, where the evolved node includes the apparatus for packet splitting.
From the above description, it can be seen that according to the method, the apparatus, and the evolved node for splitting a data packet provided by the embodiment of the present invention, when a UE accesses a PCC or a Pcell and an SCC or a Scell is also activated, an eNB splits a data packet to be scheduled by the UE in a fixed ratio. Or when the UE accesses the PCC or Pcell and has the SCC or Scell activated, the eNB determines the ratio of the rates of the current UE on different cells/carriers at the previous time or time period, and then splits the data packet to be scheduled by the UE at the next time or time period according to the ratio of the rates of the current UE on different cells/carriers at the previous time or time period.
The invention is used for filling the data packet splitting under the carrier aggregation function, fully utilizes the resources of different carriers or cells, reduces the waste of the resources of the carriers or the cells and maximizes the dispatching speed and the service experience of users.
While the invention has been described in connection with specific embodiments thereof, it is to be understood that it is intended by the appended drawings and description that the invention may be embodied in other specific forms without departing from the spirit or scope of the invention. While the features of the embodiments and examples may be combined with each other without conflicting information.
It should be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method for splitting a data packet is applied to a carrier aggregation technology, and is characterized by comprising the following steps:
determining the ratio of the rates of the current UE on different cells/carriers in the last time or time period;
and splitting a data packet to be scheduled by the UE in the next time or time period according to the ratio of the rates of the current UE in different cells/carriers in the previous time or time period.
2. The method of claim 1, wherein the eNB splits the data packets to be scheduled by the current UE in a fixed proportion before determining the proportion of the rates on different cells/carriers for the current UE at the last time instant or time period.
3. The method of claim 2, wherein after said splitting the data packets to be scheduled by the current UE at the next time instant or time period according to the proportion of the average rates of the UE at different cells/carriers at the previous time instant or time period, the method further comprises:
and for the residual resources which are not scheduled on the aggregated cells/carriers after the splitting, the eNB allocates the residual resources to the UE aggregated on the cell/carrier.
4. The method of any of claims 1-3, wherein the determining the proportion of the rates on different cells/carriers of the current UE over the last time instant or time period comprises:
determining scheduling capability of the UE on each cell/carrier;
determining the rate of the UE on each cell/carrier according to the scheduling capability of the UE on each cell/carrier;
determining the ratio of the rates of the UE on different cells/carriers according to the rate of the UE on each cell/carrier;
wherein the scheduling capability comprises at least one of: the channel quality of the UE, the occupied scheduling resources and the scheduling times.
5. The method of claim 4, wherein after said determining the proportion of the user's rates on the different cells/carriers based on the rates on the respective cells/carriers, the method further comprises:
the obtained ratio of the rates on the different cells/carriers is corrected.
6. A device for splitting data packets is applied to a carrier aggregation technology, and is characterized in that the device comprises:
a rate ratio determining module, configured to determine a ratio of rates of the current UE on different cells/carriers at a previous time or within a time period;
and the data packet splitting module is used for splitting the data packet to be scheduled by the UE in the next moment or time period according to the rate proportion of different cells/carriers in the previous moment or time period of the current UE.
7. The apparatus of claim 6, wherein said apparatus further comprises:
and the data packet initial splitting module is used for splitting the data packet to be scheduled of the current UE in a fixed proportion.
8. The apparatus of claim 7, wherein the apparatus further comprises:
and a redistribution module, configured to, for remaining resources that are not scheduled on the split aggregated cell/carrier, distribute, by the eNB, the remaining resources to the UE aggregated in the cell or carrier.
9. An apparatus as claimed in claim 7 or 8, wherein said rate ratio determining module is specifically adapted to
Determining scheduling capability of the UE on each cell/carrier;
determining the rate of the UE on each cell/carrier according to the scheduling capability of the UE on each cell/carrier;
determining the ratio of the rates of the UE on different cells/carriers according to the rate of the UE on each cell/carrier;
wherein the scheduling capability comprises at least one of: the channel quality of the UE, the occupied scheduling resources and the scheduling times.
10. An evolved node, characterized in that it comprises the apparatus for splitting data packets according to any of claims 6 to 9.
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| PCT/CN2016/080161 WO2016197722A1 (en) | 2016-01-07 | 2016-04-25 | Method and apparatus for splitting data packet, evolved node, and computer-readable storage medium |
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| CN102014496A (en) * | 2009-10-16 | 2011-04-13 | 大唐移动通信设备有限公司 | Method, equipment and system for configuring uplink control channel resources |
| CN102186250A (en) * | 2011-04-26 | 2011-09-14 | 北京邮电大学 | Method and device for allocating member carrier waves |
| CN102761904A (en) * | 2011-04-28 | 2012-10-31 | 中兴通讯股份有限公司 | Data transmission method, equipment and system |
| CN103369684A (en) * | 2013-07-18 | 2013-10-23 | 北京北方烽火科技有限公司 | Resource scheduling method and device based on carrier aggregation |
| CN104602349A (en) * | 2013-10-31 | 2015-05-06 | 索尼公司 | Carrier allocation device and method and terminal |
| WO2015147578A1 (en) * | 2014-03-26 | 2015-10-01 | 삼성전자 주식회사 | Method and apparatus for carrier aggregation communication in wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016197722A1 (en) | 2016-12-15 |
| CN106954265A (en) | 2017-07-14 |
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