CN111343670A

CN111343670A - TDD and FDD layering method and device based on uplink rate guarantee

Info

Publication number: CN111343670A
Application number: CN201811551948.0A
Authority: CN
Inventors: 李晓南; 张新超; 李常国; 张涛; 贾永超; 贺庆
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Shandong Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Shandong Co Ltd
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2020-06-26
Anticipated expiration: 2038-12-18
Also published as: CN111343670B

Abstract

The embodiment of the invention provides a TDD and FDD layering method and a device based on uplink rate guarantee, wherein the method comprises the following steps: if the judgment shows that the uplink average user experience rate of the time division duplex TDD cell is not greater than the first experience rate threshold value and the uplink synchronous state user number is not less than the first user number threshold value in the preset judgment period, triggering service layering based on uplink rate guarantee to obtain the large-service-volume UE with A4 event measurement and pilot frequency switching capacity in the TDD cell; acquiring a Frequency Division Duplex (FDD) cell with the lowest load in a neighboring cell; and if the cell uplink average user experience rate of the FDD cell is judged and known to be not less than the second experience rate threshold value, and the uplink synchronous state user number is not greater than the second user number threshold value, the UE with large service volume is switched to the FDD cell by A4. And improving the experience rate of the uplink user of the TDD cell.

Description

TDD and FDD layering method and device based on uplink rate guarantee

Technical Field

The embodiment of the invention relates to the technical field of mobile communication, in particular to a TDD and FDD layering method and device based on uplink rate guarantee.

Background

With the development of mobile communication, good communication quality and fast data service will become the core competitive guarantee of operators, and at the same time, the development of mobile communication in the future is also the target. In recent years, with the large-scale commercial use of LTE (Long Term Evolution) in the global scope, the demand of mobile data services has been increased explosively, a single system and a Frequency band are not enough to carry the increasing service demand, and TDD (Time Division duplex)/FDD (Frequency Division duplex) converged networking is an inevitable trend of mobile communication network development. With the development of the china mobile 4G network and the increase of users, in the LTE field, operators will need to provide high-quality services through more spectrum resources, and the development of 900MHz/1800MHz will tend to be towards FDD in the future. This brings new problems and challenges to the network optimization work. How to make a multi-band reselection, a switching strategy and a load balancing mechanism to ensure good user perception and full network resource utilization is a key work of TDD/FDD fusion networking.

At present, on the basis of reselection and parameter setting switching, a load balancing technology is adopted to balance service loads between TDD (time division duplex) cells and FDD (frequency division duplex) cells, so that the phenomenon that the system performance is reduced due to overhigh local cell load is avoided, and manual participation in network management and optimization can be reduced. The load balancing function can be divided into three phases: a measurement phase, a decision phase and an execution phase. In the measurement phase, the load balancing module continuously monitors and updates the load state of the serving cell and the load state of the neighboring cells. If the X2 interface exists, acquiring the load information of the neighbor cell of the different station through the X2 interface every 5 seconds (the time is configurable in the background, and the default value is 5 seconds), or acquiring the load information of the neighbor cell of the same base station through an internal message. In the judgment stage, the load balancing module judges whether the serving cell is in a high load state PRB (Physical Resource Block) utilization ratio judgment or user number judgment or PRB and user number mixed judgment according to the measurement information collected in the measurement stage). If the serving cell is in a high load state, the load balancing execution phase will be triggered. Otherwise, the load measurement phase and the decision phase are repeated. In the execution phase, for the UE (User Experience) -based measurement handover mode, some UEs in the serving cell are selected to execute a4 (load balancing in LTE), and according to the measurement result of the UE, the UE selected for handover is handed over to the low-load neighboring cell.

Due to the fact that TDD and FDD duplex modes are different, FDD uplink and downlink respectively occupy 20MHz, the TDD uplink and downlink share 20MHz, the subframe ratio of the TDD uplink and downlink is generally 1:3 configuration at the present stage, TDD is easier to be limited in uplink compared with FDD, meanwhile, due to the subframe ratio of LTE TDD, the delay (such as HARQ ACK/NACK or CQI) of certain information feedback is larger than the corresponding delay of LTE FDD, and the uplink throughput advantage of FDD is very obvious, and therefore under the same wireless environment, a user can obtain better uplink rate perception when the user resides in an FDD cell. The traditional load balancing mode does not consider the service type of the UE, when the load of the TDD cell is higher, the switching is triggered only according to the coverage condition so as to realize the load transfer to the FDD cell, but the TDD uplink sensing rate is more easily limited by the UE with large service volume (the UE with large uplink service volume refers to the UE with large data volume of an uplink buffer zone, and the UE occupies more uplink resources of the cell), part of the UE with small service volume is transferred to the FDD cell, the balancing efficiency is lower, and the sensing rate of a user can not be effectively improved.

Disclosure of Invention

Embodiments of the present invention provide a TDD and FDD layering method and apparatus based on uplink rate guarantee, which overcome the above problems or at least partially solve the above problems.

In a first aspect, an embodiment of the present invention provides a TDD and FDD layering method based on uplink rate guarantee, including:

if the judgment shows that the uplink average user experience rate of the time division duplex TDD cell is not greater than the first experience rate threshold value and the uplink synchronous state user number is not less than the first user number threshold value in the preset judgment period, triggering service layering based on uplink rate guarantee to obtain the large-service-volume UE with A4 event measurement and pilot frequency switching capacity in the TDD cell;

acquiring a Frequency Division Duplex (FDD) cell with the lowest load in a neighboring cell; and if the cell uplink average user experience rate of the FDD cell is judged and known to be not less than the second experience rate threshold value, and the uplink synchronous state user number is not greater than the second user number threshold value, the UE with large service volume is switched to the FDD cell by A4.

Preferably, the second experience rate threshold is greater than the first experience rate threshold; the first user number threshold is not less than the second user number threshold.

Preferably, the method further comprises the following steps:

and if the uplink average user experience rate of the TDD cell is larger than a first experience rate threshold value or the number of uplink synchronous state users is smaller than a first user number threshold value within a preset judgment period, stopping service layering based on uplink rate guarantee.

Preferably, the acquiring a large-traffic UE with a4 event measurement and pilot frequency handover capabilities in a TDD cell specifically includes:

if the data volume to be scheduled of each transmission interval TTI user in the TDD cell is larger than the threshold value of the data volume to be scheduled, judging that the TTI is a large-traffic TTI;

if the ratio of all large-traffic TTI numbers of the user is not less than a preset ratio threshold value in a preset statistical period, judging that the user is large-traffic UE;

and acquiring the large-traffic UE with A4 event measurement and pilot frequency switching capability in the TDD cell.

Preferably, the ratio threshold is 80% to 95%.

Preferably, the obtaining of the frequency division duplex FDD cell with the lowest load in the neighboring cell specifically includes:

and sequencing the adjacent cells reported based on the UE measurement according to the load from low to high to obtain a switching candidate target FDD cell queue, and obtaining the FDD cell arranged at the head of the queue in the switching candidate target FDD cell queue.

Preferably, the first experience rate threshold is 1000 kbps; the second experience rate threshold is 15000 kbps.

In a second aspect, an embodiment of the present invention provides a TDD and FDD layering apparatus based on uplink rate guarantee, including:

a first module, configured to trigger a service layering based on uplink rate guarantee if it is determined that an uplink average user experience rate of a Time Division Duplex (TDD) cell is not greater than a first experience rate threshold and an uplink synchronization state user number is not less than a first user number threshold within a preset determination period, and obtain a large-traffic UE with a4 event measurement and inter-frequency handover capabilities in the TDD cell;

a second module, configured to obtain a frequency division duplex FDD cell with a lowest load in a neighboring cell; and if the cell uplink average user experience rate of the FDD cell is judged and known to be not less than the second experience rate threshold value, and the uplink synchronous state user number is not greater than the second user number threshold value, the UE with large service volume is switched to the FDD cell by A4.

In a third aspect, an embodiment of the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method provided in the first aspect when executing the program.

In a fourth aspect, an embodiment of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method as provided in the first aspect.

The embodiment of the invention provides a TDD and FDD layering method and device based on uplink rate guarantee, which realize the purpose of transferring uplink load to an FDD cell with good uplink user experience when the uplink user experience of a TDD cell is limited by transferring UE with large uplink traffic, and improve the uplink user experience rate of the TDD cell.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a TDD and FDD hierarchical method based on uplink rate guarantee according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a specific flow of a TDD and FDD layering method based on uplink rate guarantee according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a TDD and FDD layered device based on uplink rate guarantee according to an embodiment of the present invention;

fig. 4 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Due to the fact that TDD and FDD duplex modes are different, FDD uplink and downlink respectively occupy 20MHz, the TDD uplink and downlink share 20MHz, the subframe ratio of the TDD uplink and downlink is generally 1:3 configuration at the present stage, TDD is easier to uplink limit than FDD, meanwhile, due to the subframe ratio of LTE TDD, the time delay of certain information feedback is larger than the corresponding time delay of LTE FDD, and the uplink throughput rate advantage of FDD is very obvious, and therefore under the same wireless environment, a user can obtain better uplink rate perception when the user resides in an FDD cell. The traditional load balancing mode does not consider the service type of the UE, when the load of the TDD cell is higher, the switching is triggered only according to the coverage condition so as to realize the load transfer to the FDD cell, but the TDD uplink sensing rate is more easily limited by the UE with large service volume (the UE with large uplink service volume refers to the UE with large data volume of an uplink buffer zone, and the UE occupies more uplink resources of the cell), part of the UE with small service volume is transferred to the FDD cell, the balancing efficiency is lower, and the sensing rate of a user can not be effectively improved.

Therefore, the embodiments of the present invention realize the purpose of transferring the uplink load to the FDD cell with good uplink user experience when the uplink user experience of the TDD cell is limited by transferring the UE with large uplink traffic, and improving the uplink user experience rate of the TDD cell. The following description and description will proceed with reference being made to various embodiments.

Fig. 1 is a TDD and FDD layering method based on uplink rate guarantee according to an embodiment of the present invention, including:

s1, if the average user experience rate of the uplink of the time division duplex TDD cell is not larger than the first experience rate threshold value and the number of the uplink synchronous state users is not smaller than the first user number threshold value in the preset judgment period, triggering service layering based on uplink rate guarantee to obtain the large-service-volume UE with A4 event measurement and pilot frequency switching capacity in the TDD cell;

s2, acquiring a Frequency Division Duplex (FDD) cell with the lowest load in an adjacent cell; and if the cell uplink average user experience rate of the FDD cell is judged and known to be not less than the second experience rate threshold value, and the uplink synchronous state user number is not greater than the second user number threshold value, the UE with large service volume is switched to the FDD cell by A4.

In this embodiment, as shown in fig. 2, after a service layering task based on uplink experience guarantee is started, an eNodeB measures a cell uplink user experience rate and a cell uplink synchronization user number in a cycle of every second. If the following two conditions are met, triggering service layering based on uplink experience guarantee, namely: in a preset decision period, the uplink average user experience rate of the Time Division Duplex (TDD) cell is not greater than a first experience rate threshold value T1, and the number of uplink synchronous state users is not less than a first user number threshold value N1.

When the triggering switching condition is met, the eNodeB selects the UE with large uplink traffic in the service cell for transfer, namely selects the UE with large traffic with the A4 event measurement and pilot frequency switching capability in the TDD cell for transfer.

Finally, acquiring a Frequency Division Duplex (FDD) cell with the lowest load in the adjacent cell; and if the cell uplink average user experience rate of the FDD cell is judged and known to be not less than a second experience rate threshold T2 and the uplink synchronous state user number is not more than a second user number threshold N2, performing A4 switching on the UE with large service volume to the FDD cell to realize service layering of TDD and FDD.

In this embodiment, by transferring a UE with a large uplink traffic volume, when the uplink user experience of the TDD cell is limited, the uplink load is transferred to the FDD cell with good uplink user experience, so as to improve the uplink user experience rate of the TDD cell.

On the basis of the above embodiment, the second experience rate threshold T2 is greater than the first experience rate threshold T1; the first user number threshold N1 is not less than the second user number threshold N2.

In this embodiment, the first experience rate threshold T1 is 1000 kbps; the second empirical rate threshold T2 is 15000 kbps.

In this embodiment, the first user number threshold N1 is not smaller than the second user number threshold N2.

Based on the above embodiment, specifically, the first user number threshold N1 and the second user number threshold N2 are both 100.

On the basis of the above embodiment, if the cell uplink average user experience rate is not greater than 1000kbps and the number of cell uplink synchronous state users is not less than 100 within the preset decision period of 5S, service layering based on uplink experience guarantee is triggered.

On the basis of the above embodiments, as shown in fig. 2, the method further includes:

and if the uplink average user experience rate of the TDD cell is larger than a first experience rate threshold value T1 or the uplink synchronous state user number is smaller than a first user number threshold value N1 in a preset judgment period, stopping service layering based on uplink rate guarantee.

In this embodiment, if the average uplink user experience rate of the cell is greater than 1000kbps or the number of uplink synchronized users of the cell is less than 100 within the preset decision period 5S, service layering based on uplink experience guarantee is stopped.

On the basis of the foregoing embodiments, acquiring a large-traffic UE with a4 event measurement and pilot frequency handover capabilities in a TDD cell, as shown in fig. 2, specifically includes:

In this embodiment, after the handover trigger condition is satisfied, the eNodeB selects an uplink large traffic UE in the serving cell for handover, where the determination condition of the large traffic UE is as follows:

in a preset period (which may be 5s), calculating the data volume to be scheduled of the user in each TTI, and if the data volume to be scheduled of the user is greater than the threshold of the data volume to be scheduled, which is 1000 bytes in this embodiment, determining that the TTI is a TTI with large traffic volume; counting the TTI number of all the large traffic of the user in a preset period, judging that the user is the UE with large traffic when the occupation ratio is more than or equal to a preset ratio threshold, screening the UE with large traffic, judging whether the UE has the capabilities of A4 measurement and pilot frequency switching, and if so, carrying out FDD target cell selection.

In addition to the above embodiments, the ratio threshold is 80% to 95%.

In this embodiment, as a preferred implementation, the ratio threshold is 90%.

On the basis of the foregoing embodiments, acquiring a frequency division duplex FDD cell with the lowest load in a neighboring cell specifically includes, as shown in fig. 2:

On the basis of the above embodiments, the load balancing module sorts the neighboring cells measured and reported by the UE in the order from low to high to obtain a candidate handover target FDD cell queue, where the FDD cell with the lowest load is arranged at the head of the queue, and in a preset decision period of 5S, if the FDD cell meets the cell uplink average user experience rate of not less than 15000kbps and the cell uplink synchronous state user number of not more than 100, the selected UE with large traffic is subjected to a4 handover to the FDD cell, thereby implementing service layering of TDD and FDD.

An embodiment of the present invention further provides a TDD and FDD layering apparatus based on uplink rate guarantee, and based on the TDD and FDD layering method based on uplink rate guarantee in the foregoing embodiments, as shown in fig. 3, the TDD and FDD layering apparatus includes a first module 30 and a second module 40, where:

if the first module 30 determines that the uplink average user experience rate of the TDD cell is not greater than the first experience rate threshold and the number of uplink synchronous users is not less than the first user number threshold in the preset determination period, triggering a service layer based on uplink rate guarantee to obtain a large-traffic UE with a4 event measurement and pilot frequency switching capability in the TDD cell;

the second module 40 obtains the frequency division duplex FDD cell with the lowest load in the adjacent cell; and if the cell uplink average user experience rate of the FDD cell is judged and known to be not less than the second experience rate threshold value, and the uplink synchronous state user number is not greater than the second user number threshold value, the UE with large service volume is switched to the FDD cell by A4.

Fig. 4 is a schematic entity structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 4, the electronic device may include: a processor (processor)810, a communication Interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication Interface 820 and the memory 830 communicate with each other via the communication bus 840. The processor 810 may call a computer program stored in the memory 830 and executable on the processor 810 to perform the uplink rate guarantee based TDD and FDD hierarchical method provided by the above embodiments, for example, including:

In addition, the logic instructions in the memory 830 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

An embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, is implemented to perform the uplink rate guarantee based TDD and FDD hierarchical method provided in the foregoing embodiments, and the method includes:

An embodiment of the present invention further provides a computer program product, where the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, where the computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute the uplink rate guarantee based TDD and FDD hierarchical method as described above, for example, the method includes:

In summary, the TDD and FDD layering method and apparatus based on uplink rate guarantee provided in the embodiments of the present invention implement, by transferring a UE with a large uplink traffic volume, when uplink user experience of a TDD cell is limited, transferring an uplink load to an FDD cell with good uplink user experience, and improve an uplink user experience rate of the TDD cell.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A TDD and FDD layering method based on uplink rate guarantee is characterized by comprising the following steps:

2. The uplink rate guarantee based TDD and FDD layering method according to claim 1, wherein the second empirical rate threshold is greater than the first empirical rate threshold; the first user number threshold is not less than the second user number threshold.

3. The uplink rate guarantee-based TDD and FDD layering method according to claim 1, further comprising:

4. The uplink rate guarantee-based TDD and FDD layering method of claim 1, wherein obtaining a large traffic UE with a4 event measurement and pilot frequency switching capability in a TDD cell specifically comprises:

5. The uplink rate guarantee-based TDD and FDD layering method according to claim 4, wherein said ratio threshold is 80% -95%.

6. The TDD/FDD layering method based on uplink rate guarantee according to claim 1, wherein obtaining a Frequency Division Duplex (FDD) cell with a lowest load in a neighboring cell specifically comprises:

7. The uplink rate guarantee-based TDD and FDD layering method according to claim 2, wherein the first experience rate threshold is 1000 kbps; the second experience rate threshold is 15000 kbps.

8. A TDD and FDD layering device based on uplink rate guarantee, characterized by that includes:

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1 to 7 are implemented when the processor executes the program.

10. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.