CN105578595B

CN105578595B - Carrier resource dynamic adjusting method and device based on carrier wave polymerization

Info

Publication number: CN105578595B
Application number: CN201410528447.6A
Authority: CN
Inventors: 李维娜; 朱雅琼
Original assignee: Putian Information Technology Co Ltd
Current assignee: Putian Information Technology Co Ltd
Priority date: 2014-10-09
Filing date: 2014-10-09
Publication date: 2018-12-14
Anticipated expiration: 2034-10-09
Also published as: CN105578595A

Abstract

The present invention provides a kind of carrier resource dynamic adjusting method and device based on carrier wave polymerization, wherein the described method includes: determining the distribution use information of all Physical Resource Block PRB in a carrier wave；According to the corresponding preset rules of distribution use information, the carrier wave is adjusted to distribute to using current area as the quantity of the PRB of the main plot user equipment (UE) of main plot, realize that at least one is able to use the PRB adjusted for being not yet assigned to main plot UE in the carrier wave by the secondary cell UE of secondary cell of current area, preset rules include: the rule being arranged according to preset heavy duty decision threshold LC_Threshold；Wherein, secondary cell UE is the UE, LC_Threshold ∈ [0,1] for supporting carrier wave polymerization.The above method can solve the resource allocation problem under carrier wave polymerization, it can be reduced the dynamic adjustment number of carrier resource, avoid retransmitting the packet loss of data, it is preferential to guarantee to guarantee capabilities of user devices as far as possible while realizing band resource effective use using carrier wave as the band resource of the user equipment of main plot.

Description

Carrier resource dynamic adjustment method and device based on carrier aggregation

Technical Field

The present invention relates to communications technologies, and in particular, to a method and an apparatus for dynamically adjusting carrier resources based on carrier aggregation.

Background

A maximum transmission bandwidth supported by a Long Term Evolution (Long Term Evolution, LTE for short) system is 20MHz, and in order to provide a higher data rate to a mobile User, a Carrier Aggregation (CA for short) is proposed by a Long Term Evolution advanced (Long Term Evolution-advanced, LTE-a for short) system, which aims to provide a larger bandwidth for a User Equipment (User Equipment, UE for short) having a corresponding capability and improve a peak rate of the User Equipment. The carrier aggregation technology aggregates two or more Component Carriers (CCs) to support a transmission bandwidth greater than 20MHz and not more than 100MHz at maximum. An LTE-a system employing carrier aggregation technology is a multi-carrier system.

The CC represents an uplink carrier or a downlink carrier, and an uplink CC and a downlink CC are associated together by some correspondence to form a Cell (Cell), so carrier aggregation is also called Cell aggregation (CellAggregation). In order to facilitate management of component carriers, the component carriers are divided into Primary Component Carriers (PCC) and Secondary Component Carriers (SCC). The roles of the downlink primary component carrier PCC include: establishing Radio Resource Control (RRC) signaling connection, Non-Access Stratum (NAS) mobility, input serving as security parameters and the like; the uplink primary component carrier PCC is used to transmit control information of the physical layer. The downlink PCC and the uplink PCC are associated together to form a Primary Cell (PCell), and the downlink SCC and the optional uplink SCC are associated together to form a Secondary Cell (SCell).

Through carrier aggregation technology, a UE may perform data transmission on a PCC and one or more SCCs, so for one carrier (i.e., one cell) in a carrier aggregation manner, there are two types of UEs: one is a primary cell UE using the carrier as a primary cell, and the other is a secondary cell UE using the carrier as a secondary cell. The existing resource scheduling methods for these two types of UEs are: a polling algorithm, a maximum signal-to-noise ratio algorithm, a proportional fairness algorithm, and the like, the priorities of the two types of different UEs cannot be arranged, the resource allocations of the two types of different UEs cannot be distinguished, and the requirements of the service quality required by each UE cannot be met.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a method and an apparatus for dynamically adjusting carrier resources based on carrier aggregation, which can solve the problem of resource allocation of a user equipment in a cell based on a carrier and a user equipment in a cell based on a carrier in a carrier aggregation manner, reduce the number of times of dynamically adjusting carrier resources, avoid packet loss of retransmission data, preferentially ensure the frequency band resources of the user equipment in the cell based on the carrier, and ensure the performance of the user equipment as much as possible while achieving effective utilization of the frequency band resources.

In a first aspect, the present invention provides a method for dynamically adjusting carrier resources based on carrier aggregation, including:

determining the allocation use information of all Physical Resource Blocks (PRBs) in one carrier;

according to a preset rule corresponding to the allocation use information, the number of PRBs allocated to the primary cell User Equipment (UE) of the current cell as a primary cell by the carrier is adjusted, so that at least one secondary cell UE of the current cell as a secondary cell can use the adjusted PRBs which are not allocated to the primary cell UE in the carrier, and the preset rule comprises: adjusting rules set according to a preset heavy load judgment Threshold LC _ Threshold;

the UE of the secondary cell is the UE supporting carrier aggregation, and LC _ Threshold belongs to [0,1 ].

Optionally, the determining allocation usage information of all physical resource blocks PRB in one carrier includes:

determining that all PRBs in one carrier are unused or used by a primary cell UE;

or,

determining that all PRBs in one carrier are used by both a primary cell UE and a secondary cell UE.

Optionally, the determining that all PRBs in one carrier are not used or used by the primary cell UE includes:

when α is 0, determining that all PRBs in the carrier are not used or used by the primary cell UE;

α is the proportion of the number of PRBs of the downlink/uplink available resource CC _ SCell of the carrier to the total PRBs of all the current physical downlink/uplink shared channel resources, wherein α belongs to [0,1 ];

correspondingly, the adjusting, according to the preset rule corresponding to the allocation usage information, the number of PRBs allocated to the primary cell UE using the current cell as the primary cell by the carrier includes:

updating α value to get α ═ PCell _ Res _ Min;

wherein, PCell _ Res _ Min is a first pre-configured parameter and is the minimum proportion of the available frequency band resources of the secondary cell, and PCell _ Res _ Min belongs to [0,1 ].

Optionally, the determining that all PRBs in one carrier are used by both the primary cell UE and the secondary cell UE includes:

when α ≠ 0, determining that all PRBs in the carrier are used by both the primary cell UE and the secondary cell UE;

in each dynamic adjustment period after the auxiliary cell UE is added, when Load _ CC _ PCell is larger than or equal to LC _ Threshold, the value of α is adjusted according to a first formula;

or,

in each dynamic adjustment period after the secondary cell UE is added, when Load _ CC _ PCell < LC _ Threshold, and Load _ CC _ SCell > LC _ Threshold, and Load' _ CC _ PCell is greater than or equal to LC _ Threshold, the value of α is not adjusted;

or,

in each dynamic adjustment period after the secondary cell UE is added, when Load _ CC _ PCell < LC _ Threshold, Load _ CC _ SCell > LC _ Threshold and Load' _ CC _ PCell < LC _ Threshold, the α value is adjusted according to a second formula;

wherein, Load _ CC _ PCell is the total Load of each service of the primary cell UE of the carrier calculated by the Load evaluation module in the radio resource management, Load _ CC _ SCell is the total Load of each service of the secondary cell UE of the carrier calculated by the Load evaluation module in the radio resource management, Load '_ CC _ PCell is the total Load of each service of the primary cell UE of the carrier calculated by the Load evaluation module in the radio resource management after the value of α is adjusted according to the second formula, and Load _ CC _ PCell, Load' _ CC _ PCell, and Load _ CC _ SCell are [0,1 ];

the first formula is:

α＝α–delta；

the second formula is:

α＝α+delta；

wherein, delta is a second pre-configuration parameter and is a carrier resource dynamic adjustment step size, and delta belongs to [0,1 ].

In a second aspect, the present invention provides a carrier resource dynamic adjustment apparatus based on carrier aggregation, including:

the device comprises a determining module, a determining module and a judging module, wherein the determining module is used for determining the allocation use information of all Physical Resource Blocks (PRBs) in one carrier;

an adjusting module, configured to adjust, according to a preset rule corresponding to the allocation usage information, the number of PRBs allocated to a primary cell UE in which a current cell is a primary cell, to at least one secondary cell UE in which the current cell is a secondary cell, where the adjusted PRBs not allocated to the primary cell UE in the carrier can be used by the at least one secondary cell UE in which the current cell is a secondary cell, where the preset rule includes: adjusting rules set according to a preset heavy load judgment Threshold LC _ Threshold;

Optionally, the determining means is specifically configured to

or,

Optionally, the determining module is specifically configured to determine that all PRBs in one carrier are not used or are used by a primary cell UE, and includes:

accordingly, the adjustment module is particularly useful for

Updating α value to get α ═ PCell _ Res _ Min;

Optionally, the determining module is specifically configured to determine that all PRBs in one carrier are used by both a primary cell UE and a secondary cell UE, and includes:

accordingly, the adjustment module is particularly useful for

or,

the first formula is:

α＝α–delta；

the second formula is:

α＝α+delta；

According to the technical scheme, the carrier resource dynamic adjustment method and device based on carrier aggregation, disclosed by the invention, can be used for realizing that at least one auxiliary cell UE using the current cell as an auxiliary cell can use the adjusted PRB which is not allocated to the main cell UE in the carrier by determining the allocation use information of all Physical Resource Blocks (PRBs) in the carrier and adjusting the number of PRBs allocated to the main cell UE using the current cell as the main cell according to the preset rule corresponding to the allocation use information, wherein the preset rule comprises the following steps: according to the rule set by the preset heavy load judgment Threshold LC _ Threshold, the problem of resource allocation of the user equipment taking the carrier as the main cell and the user equipment taking the carrier as the auxiliary cell in each carrier in a carrier aggregation mode can be solved, the dynamic adjustment times of the carrier resources can be reduced, the packet loss of retransmission data is avoided, the frequency band resources of the user equipment taking the carrier as the main cell are preferentially ensured, and the performance of the user equipment is ensured as much as possible while the effective utilization of the frequency band resources is realized.

Drawings

Fig. 1 is a diagram illustrating resource configuration examples of a primary cell UE using a carrier CCn as a primary cell and a secondary cell UE using a CCn as a secondary cell according to the prior art;

fig. 2 is a schematic flowchart of a method for dynamically adjusting carrier resources based on carrier aggregation according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a carrier resource dynamic adjustment apparatus based on carrier aggregation 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

In the prior art, besides the existing resource scheduling method is used to perform scheduling on two types of UEs on the same carrier, another method is also disclosed: in view of Radio Resource Management (RRM), all available frequency band resources of a carrier are divided into two parts, fig. 1 shows an exemplary view of Resource configuration of a primary cell UE using a carrier CCn as a primary cell and an auxiliary cell UE using a CCn as an auxiliary cell provided in the prior art, as shown in fig. 1, one part is used for the primary cell UE using the carrier as the primary cell, and the other part is used for the auxiliary cell UE using the carrier as the auxiliary cell, so that difference processing between two types of users can be effectively implemented, and performance of the users can be guaranteed. However, how to divide the carrier frequency band resource is a problem to be solved.

The method in the prior art compares the total load of each service of the primary cell UE using a carrier as a primary cell with the total load of each service of the secondary cell UE using a carrier as a secondary cell, and divides the two parts of frequency band resources according to the calculated load ratio.

The disadvantages of this prior art method are: the adjustment of the frequency band resource is frequently triggered along with the change of the load ratio of the two types of UEs, which is easy to cause loss to data retransmission, and it is difficult to preferentially ensure the performance of the UE in the primary cell using the carrier as the primary cell when the load is heavy.

The invention is realized by dividing the whole frequency band of the carrier into two parts for the users taking the carrier as the main cell and the users taking the carrier as the auxiliary cell, wherein one part is distributed to the users taking the carrier as the main cell and the other part is distributed to the users taking the carrier as the auxiliary cell, and the frequency band division can be dynamically adjusted according to the total load of each service of the users taking the carrier as the main cell and the total load of each service of the users taking the carrier as the auxiliary cell in a load evaluation module in the wireless resource management.

Fig. 2 is a schematic flowchart illustrating a method for dynamically adjusting carrier resources based on carrier aggregation according to an embodiment of the present invention, and as shown in fig. 2, the method for dynamically adjusting carrier resources based on carrier aggregation according to the embodiment is as follows.

201. The allocation usage information of all physical resource blocks PRB in one carrier is determined.

Note that, when the cell CC is established, since only the primary cell UE whose primary cell is the carrier cell is present by default in the long term evolution LTE system, the initial value of α is 0.

202. According to a preset rule corresponding to the allocation use information, the number of PRBs allocated to the primary cell User Equipment (UE) of the current cell as a primary cell by the carrier is adjusted, so that at least one secondary cell UE of the current cell as a secondary cell can use the adjusted PRBs which are not allocated to the primary cell UE in the carrier, and the preset rule comprises: and adjusting rules set according to a preset heavy load judgment Threshold LC _ Threshold.

It is understood that the LC _ Threshold of the present embodiment can be preset according to simulation or actual measurement experience.

In the method for dynamically adjusting carrier resources based on carrier aggregation according to this embodiment, by determining allocation usage information of all physical resource blocks PRBs in a carrier, and according to a preset rule corresponding to the allocation usage information, adjusting the number of PRBs allocated to a primary cell user equipment UE using a current cell as a primary cell by the carrier, it is achieved that at least one secondary cell UE using the current cell as a secondary cell can use adjusted PRBs that are not allocated to the primary cell UE in the carrier, where the preset rule includes: according to the rule set by the preset heavy load judgment Threshold LC _ Threshold, the problem of resource allocation of the user equipment taking the carrier as the main cell and the user equipment taking the carrier as the auxiliary cell in each carrier in a carrier aggregation mode can be solved, the dynamic adjustment times of the carrier resources can be reduced, the packet loss of retransmission data is avoided, the frequency band resources of the user equipment taking the carrier as the main cell are preferentially ensured, and the performance of the user equipment is ensured as much as possible while the effective utilization of the frequency band resources is realized. .

In a specific application, the step 201 may specifically be: determining that all PRBs in one carrier are unused or used by a primary cell UE may include:

accordingly, the step 202 may include:

updating α value to get α ═ PCell _ Res _ Min;

In another specific application, the step 201 may specifically be: determining that all PRBs in one carrier are used by both the primary cell UE and the secondary cell UE may include:

accordingly, the step 202 may include:

or,

the first formula is:

α＝α–delta；

the second formula is:

α＝α+delta；

For example, the first preconfigured parameter and the second preconfigured parameter of the present embodiment may be configuration parameters of an operation and maintenance system OM, which may be preset according to simulation or actual measurement experience, respectively, where the operation and maintenance system OM is already present in the long term evolution LTE system in the prior art.

It should be noted that, in this embodiment, before the value α is adjusted, the total Load _ CC _ PCell of each service of the primary cell UE of the carrier, which is calculated by the Load evaluation module in the radio resource management after the value α is adjusted according to the second formula, can be obtained.

It is understood that the TTI of each dynamic adjustment period in the present embodiment is 1 ms.

It can be understood that the Load evaluation module in the radio resource management of this embodiment is already present in the long term evolution LTE system in the prior art, Load _ CC _ SCell is a total Load of each service of the secondary cell UE of the carrier calculated by the Load evaluation module in the radio resource management, Load _ CC _ SCell belongs to [0,1], and the LC _ Threshold is not affected by the frequency band change of Load _ CC _ PCell and Load _ CC _ SCell.

The method for dynamically adjusting carrier resources based on carrier aggregation according to the embodiment can solve the problem of resource allocation of user equipment in a cell with a carrier as a main cell and user equipment in a cell with a carrier as an auxiliary cell in each carrier in a carrier aggregation manner, reduce the number of times of dynamically adjusting carrier resources, avoid packet loss of retransmission data, preferentially ensure the frequency band resources of the user equipment in the cell with the carrier as a main cell, and ensure the performance of the user equipment as much as possible while realizing effective utilization of the frequency band resources.

Fig. 3 is a schematic structural diagram of a carrier resource dynamic adjustment apparatus based on carrier aggregation according to an embodiment of the present invention, and as shown in fig. 3, the carrier resource dynamic adjustment apparatus based on carrier aggregation according to the embodiment includes: a determination module 31 and an adjustment module 32;

a determining module 31, configured to determine allocation usage information of all physical resource blocks PRB in one carrier;

an adjusting module 32, configured to adjust, according to a preset rule corresponding to the allocation usage information, the number of PRBs allocated to the primary cell UE in which the current cell is a primary cell, so that at least one secondary cell UE in which the current cell is a secondary cell can use the adjusted PRBs that are not allocated to the primary cell UE in the carrier, where the preset rule includes: adjusting rules set according to a preset heavy load judgment Threshold LC _ Threshold;

Note that, in the apparatus of the present embodiment, when the cell CC is established, only the primary cell UE whose primary cell is the carrier cell is present by default in the long term evolution LTE system, and therefore the initial value of α is 0.

In a specific application, the determining module 31 may be specifically configured to determine that all PRBs in one carrier are not used or are used by a primary cell UE, and may include:

accordingly, the adjustment module 32 may be specifically adapted to

Updating α value to get α ═ PCell _ Res _ Min;

In another specific application, the determining module 31 may be specifically configured to determine that all PRBs in one carrier are used by both a primary cell UE and a secondary cell UE, and may include:

accordingly, the adjustment module 32 may be specifically adapted to

or,

the first formula is:

α＝α–delta；

the second formula is:

α＝α+delta；

The carrier resource dynamic adjustment device based on carrier aggregation according to this embodiment can solve the resource allocation problem of the user equipment in the primary cell using a carrier and the user equipment in the secondary cell using a carrier in each carrier in a carrier aggregation manner, reduce the number of times of dynamic adjustment of carrier resources, avoid packet loss of retransmission data, preferentially ensure the frequency band resources of the user equipment in the primary cell using a carrier, and ensure the performance of the user equipment as much as possible while achieving effective utilization of the frequency band resources.

The carrier resource dynamic adjustment apparatus based on carrier aggregation in this embodiment may be configured to execute the technical solution in the method embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, and are not described herein again.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for dynamically adjusting carrier resources based on carrier aggregation is characterized by comprising the following steps:

the UE of the auxiliary cell is the UE supporting carrier aggregation, and LC _ Threshold belongs to [0,1 ];

wherein the determining that all PRBs in one carrier are unused or used by a primary cell UE includes:

updating α value to get α ═ PCell _ Res _ Min;

wherein, PCell _ Res _ Min is a first pre-configuration parameter and is the minimum proportion of the available frequency band resources of the secondary cell, and the PCell _ Res _ Min belongs to [0,1 ];

or,

the determining that all PRBs in one carrier are used by both the primary cell UE and the secondary cell UE includes:

or,

in each dynamic adjustment period after the secondary cell UE is added, when Load _ CC _ PCell < LC _ Threshold and Load _ CC _ SCell > LC _ Threshold, and Load' _ CC _ PCell is greater than or equal to LC _ Threshold, the value of α is not adjusted;

or,

in each dynamic adjustment period after the secondary cell UE is added, when Load _ CC _ PCell < LC _ Threshold, and Load _ CC _ SCell > LC _ Threshold, Load' _ CC _ PCell < LC _ Threshold, the value of α is adjusted according to a second formula;

the first formula is:

α＝α–delta；

the second formula is:

α＝α+delta；

2. A carrier resource dynamic adjustment device based on carrier aggregation is characterized by comprising:

the determining module is specifically configured to determine that all PRBs in one carrier are unused or used by a primary cell UE, and includes:

accordingly, the adjustment module is particularly useful for

Updating α value to get α ═ PCell _ Res _ Min;

or,

the determining module is specifically configured to determine that all PRBs in one carrier are used by both the primary cell UE and the secondary cell UE, and includes:

accordingly, the adjustment module is particularly useful for

or,

the first formula is:

α＝α–delta；

the second formula is:

α＝α+delta；