CN101841914B - Scheduling method, base station equipment and communication system - Google Patents

Abstract

An embodiment of the present invention provides a scheduling method, base station equipment, and a communication system, wherein the scheduling method includes: according to the load conditions of two coordinated cells with dual carrier frequencies and the status of user equipment UE, determine the UE using dual carrier frequencies for transmission The scheduling method is also a dynamic carrier selection scheduling method; the UE is scheduled using the selected scheduling method. By using the technical solutions provided by the embodiments of the present invention, UEs can be flexibly scheduled in the multi-carrier frequency HSUPA.

Description

Scheduling method, base station equipment and communication system

technical field

The present invention relates to the technical field of communication, in particular to a scheduling method, base station equipment and a communication system.

Background technique

Universal mobile telecommunications system (UMTS) is the third generation mobile communication system using Wide-band Code-Division Multiple Access (WCDMA) air interface technology, usually referred to as UMTS system WCDMA communication system. The UMTS system adopts a structure similar to that of the second-generation mobile communication system, including a radio access network (RAN: radio access network) and a core network (CN: core network). Among them, the wireless access network is used to handle all wireless-related functions, while the CN handles all voice calls and data connections in the UMTS system, and realizes switching and routing functions with external networks.

The 3rd Generation Partnership Project (3GPP) passed the High Speed Data Wireless Access (HighSpeed Packet Access, HSPA) evolution research project. In order to meet the growing needs of wireless services, in the existing single-carrier WCDMA communication system Based on this, a multi-carrier WCDMA communication system is proposed.

In the prior art, the scheduling algorithm is not flexibly selected according to the actual load of the cell, and the system throughput gain cannot always be maximized.

Contents of the invention

Embodiments of the present invention provide a scheduling method, base station equipment, and a communication system, enabling the base station to flexibly select a scheduling algorithm.

In view of this, embodiments of the present invention provide:

A scheduling method, comprising:

According to the load conditions of the two coordinated cells with dual carrier frequencies and the status of the user equipment UE, determine whether the UE adopts a scheduling method for dual carrier frequency transmission or a dynamic carrier frequency selection scheduling method;

Using the selected scheduling method, the UE is scheduled.

A base station equipment, comprising:

A determining unit, configured to determine whether the UE adopts a dual carrier frequency transmission scheduling method or a dynamic carrier frequency selection scheduling method according to the load situation of the dual carrier frequency coordinated cell and the status of the UE;

A scheduling unit, configured to schedule the UE by using the selected scheduling method.

A communication system, comprising: a base station device communicably connected to a UE,

The base station equipment is configured to determine whether the UE adopts the scheduling method of dual-carrier frequency transmission or the scheduling method of dynamic carrier frequency selection according to the load conditions of the two coordinated cells of the dual-carrier frequency and the status of the user equipment UE; The scheduling method is to schedule the UE.

The embodiment of the present invention can determine whether the UE adopts the scheduling method of dual-carrier frequency transmission or the scheduling method of dynamic carrier frequency selection according to the load conditions of the two coordinated cells with dual carrier frequencies and the status of the UE, so as to flexibly select the scheduling method for the UE, and can The UE is scheduled in the multi-carrier frequency system so that the throughput gain of the system is always at the maximum.

Description of drawings

FIG. 1 is a flowchart of a scheduling method provided by Embodiment 1 of the present invention;

FIG. 2 is a flowchart of a scheduling method provided by Embodiment 2 of the present invention;

FIG. 3 is a structural diagram of base station equipment provided by Embodiment 3 of the present invention.

Detailed ways

An embodiment of the present invention provides a scheduling method, the method includes: according to the load conditions of the two coordinated cells with dual carrier frequencies and the status of the UE requesting resources, determine whether to use the dual carrier frequency transmission scheduling method or the dynamic carrier frequency transmission scheduling method for the UE. A frequency selection scheduling method; use the selected scheduling method to schedule the UE. Those skilled in the art should understand that the present invention uses a multi-carrier high-speed uplink packet access (High Speed Uplink Packet Access, HSUPA) system as an example to illustrate the present invention, and does not limit the present invention.

The embodiment of the present invention can determine whether the UE adopts the scheduling method of dual-carrier frequency transmission or the scheduling method of dynamic carrier frequency selection according to the load conditions of the two coordinated cells with dual carrier frequencies and the status of the UE, so as to flexibly select the scheduling method for the UE, and can Schedule UEs in multi-carrier frequency HSUPA.

Referring to Figure 1, Embodiment 1 of the present invention provides a scheduling method, which is applicable when a UE requests resources from a base station, and the method includes:

Step 101, the base station (NodeB) receives the scheduling information sent by the UE requesting resources, the scheduling information includes: UPH (UE Power Headroom, user power headroom), TEBS (Total E-DCHBuffer Status, total enhanced dedicated channel buffer status ), HLBS (Highest priority Logicalchannel Buffer Status, highest priority logical channel buffer status), HLID (Highest priority Logical channel ID, highest priority logical channel identification), among them, TEBS is UEE-DCH (Enhanced Dedicated Channel, enhanced dedicated channel ) buffer, the base station can calculate the power required to send all the data in the UE buffer according to the TEBS. UPH is the maximum power that the UE can use and the Dedicated Physical Control Channel (Dedicated Physical Control Channel, DPCCH) code power ratio, the base station can calculate the current remaining power of the UE according to the UPH.

In this step, the base station can calculate the rate requested by the UE according to the scheduling information reported by the UE.

Step 102. According to the amount of data requested by the UE to be sent, evaluate whether the UE is applicable to the scheduling method using dual carrier frequency transmission.

The specific implementation of this step is: judging whether the TEBS in the scheduling information exceeds the threshold, if yes, it means that the UE needs to send a lot of data, and the UE is applicable to the scheduling method using dual carrier frequency transmission, if not, it means The UE transmits less data, and data transmission can be completed on one carrier frequency, and data transmission does not need to be performed on two carrier frequencies.

Step 103: Evaluate whether the UE adopts the dual-carrier-frequency transmission scheduling method to increase the data transmission rate.

This step can be implemented in the following manner: Evaluate whether the UE has a power margin for sending data at the power corresponding to the maximum Serving Grant (SG) on any carrier frequency, and if so, it means that the scheduling of dual-carrier frequency transmission is adopted The method will bring gain in data transmission rate, otherwise, the scheduling method adopting dual carrier frequency transmission will not bring gain in data transmission power.

Step 104 , according to the load on the network side, evaluate whether to support the UE to adopt the dual carrier frequency transmission scheduling method.

The implementation of this step may be as follows: after the base station evaluates whether the loads of the two coordinated cells of the dual carrier frequency are lower than the threshold after the resource is allocated to the two coordinated cells of the dual carrier frequency according to the request rate of the UE, if yes , it means that the two coordinated cells are not overloaded, and the network side supports the scheduling method that the UE adopts dual-carrier frequency transmission; otherwise, the network side does not support the scheduling method that the UE adopts dual-carrier frequency transmission.

When it is obtained according to step 102 that the UE is not suitable for the scheduling method of dual-carrier frequency transmission, or according to step 103, it is obtained that the UE adopts dual-carrier frequency transmission when there is no gain in data transmission rate, or according to step 104, it is obtained that the network side does not support If the UE adopts the scheduling method of dual-carrier frequency transmission, perform step 105; otherwise, select the scheduling method of dual-carrier frequency transmission for the UE, allocate resources for the UE on both carrier frequencies, and send authorization information to the UE, The authorization information carries the authorization values corresponding to the two carrier frequencies, and the UE obtains and saves the SG values corresponding to the two carrier frequencies according to the authorization values corresponding to the two carrier frequencies. Data is sent on the corresponding carrier frequency.

Step 105, the base station evaluates the load of the two coordinated cells after allocating resources for the UE in the two coordinated cells according to the rate requested by the UE, if both coordinated cells are overloaded, perform step 107, otherwise perform step 106.

Step 106: Determine to adopt the dynamic carrier frequency selection scheduling method for the UE, send authorization information to the UE, the authorization information carries the authorization value of the selected carrier frequency, and the UE sends data on the corresponding carrier frequency according to the authorization information.

Wherein, the dynamic carrier frequency selection scheduling method is to dynamically select a carrier frequency for the UE according to the request rate of the UE and the load status of the two coordinated cells. The dynamic carrier frequency selection scheduling method can adopt the following methods, but is not limited to the following methods :

After evaluating the resource allocation on the two cooperating cells of the dual carrier frequency according to the request rate of the UE, the load of the two cooperating cells of the dual carrier frequency is evaluated. The UE allocates resources, and the authorization information carries the authorization value of the carrier frequency of the light-loaded cell. When only one cell is not overloaded, select the non-overloaded cell to allocate resources for the UE, and the authorization information carries the non-overloaded cell. The authorized value of the carrier frequency of the cell.

Step 107 , judging whether there is a UE adopting the dual carrier frequency transmission scheduling method in the two coordinated cells, if not, perform step 108 , if yes, perform step 109 .

Step 108, determine to adopt the single-carrier HSUPA access control method for the UE requesting resources.

Step 109: Change a group of UEs in the two coordinated cells using the dual carrier frequency transmission scheduling method to use the dynamic carrier frequency selection scheduling method, so that the remaining resources of the two coordinated cells change, and return to step 105

Wherein, a group of UEs in this step may be one UE or multiple UEs, and in this step, one UE may switch the scheduling method one by one, or a group of UEs may switch the scheduling method together, which does not affect the scope of the present invention. accomplish.

Embodiment 1 of the present invention When the UE requests resources, according to the information such as the rate requested by the UE, the amount of data and the load conditions of the two coordinated cells, the scheduling method is flexibly selected for the UE; and when the base station cannot allocate resources according to the requested rate of the UE , by changing the scheduling method of the UE that has adopted the dual-carrier frequency transmission scheduling method to a dynamic carrier frequency selection scheduling method, the remaining resources of the two coordinated cells of the dual-carrier frequency are changed, so that the base station according to the rate requested by the UE and the two According to the current load condition of the cooperative cell, a carrier is reasonably selected to transmit the data of the UE, which improves the system function and ensures the maximum throughput gain of the system.

Embodiment two:

Referring to Fig. 2, Embodiment 2 of the present invention provides a scheduling method, which is applicable when the load on the network side is relatively light. The processing method of the base station in this embodiment can be implemented by the same base station device application, the method includes:

201. The base station receives uplink data and uplink control information sent by multiple UEs, where the uplink control information includes: a Happy bit indicator and scheduling information.

Wherein, the Happy bit indication bit is used to indicate whether the UE is satisfied with the current transmission rate and power of the uplink data.

202. The base station determines, according to uplink control information of multiple UEs, that resources currently used by the UE need to be adjusted.

203 . Evaluate whether the UE that has adopted the dynamic carrier selection scheduling method can adopt the dual carrier frequency transmission scheduling method, if not, end this process, and if yes, perform 204 .

The process of evaluating whether the UE that has adopted the dynamic carrier selection scheduling method can adopt the dual carrier frequency transmission scheduling method includes: evaluating whether the UE is suitable for the dual carrier frequency transmission scheduling method according to the amount of data requested by the UE; evaluating the UE Whether the scheduling method using dual carrier frequency transmission has a gain in the data transmission rate; according to the load on the network side, evaluate whether to support the UE to adopt the scheduling method of dual carrier frequency transmission, the specific implementation method is the same as steps 102 and 103 in the first embodiment , 104 are the same, and will not be repeated here.

204 . After the UE adopts the scheduling method of dual-carrier frequency transmission, whether the two coordinated cells are not overloaded, if not, end this process, and if yes, go to 205 .

In this step, the evaluation can be performed one by one UE in turn, for example, first evaluate whether the two coordinated cells are overloaded after the first UE adopts the dual-carrier frequency transmission scheduling method, and then evaluate whether the second UE adopts the dual-carrier frequency transmission scheduling method. Whether the two coordinated cells are overloaded after the scheduling method; it is also possible to evaluate at one time whether the two coordinated cells are overloaded after multiple UEs adopt the dual carrier frequency transmission scheduling method.

205. Determine to change the scheduling method of the UE to a scheduling method of dual-carrier frequency transmission, allocate resources for the UE on both carrier frequencies, and send authorization information to the UE. The authorization information includes: the authorization information carries two corresponding The authorization value of the carrier frequency, the UE obtains and saves the SG value corresponding to the two carrier frequencies according to the authorization value corresponding to the two carrier frequencies, and the subsequent UE sends the SG value on the corresponding carrier frequency according to the SG value corresponding to the two carrier frequencies data.

In Embodiment 2 of the present invention, when the load on the network side is relatively light, by changing the scheduling method of the UE that has adopted the dynamic carrier frequency selection scheduling method to the scheduling method of dual carrier frequency transmission, resources are allocated to the UE on two carrier frequencies, To increase the rate at which the UE sends data.

Embodiment three:

Referring to Figure 3, Embodiment 3 of the present invention provides a base station device, including:

The determining unit 301 is configured to determine whether the UE adopts a dual-carrier frequency transmission scheduling method or a dynamic carrier frequency selection scheduling method according to the load conditions of the two coordinated cells of the dual-carrier frequency and the status of the UE;

The scheduling unit 302 is configured to schedule the UE by using the selected scheduling method.

Wherein, the base station device further includes: a first evaluation unit, configured to evaluate whether the UE has a power headroom when sending data on any carrier frequency in the dual carrier frequency with the power corresponding to the maximum authorized SG; and the second An evaluation unit, configured to evaluate the load conditions of the two coordinated cells after resources are allocated to the UE on the two coordinated cells according to the rate requested by the UE; and a third evaluation unit, configured to send The amount of data to evaluate whether the UE is suitable for the scheduling method of dual-carrier frequency transmission;

Wherein, the determining unit 301 includes:

A first determining unit, configured to determine whether the UE requesting resources is applicable to the scheduling method of dual-carrier frequency transmission;

The second determining unit is configured to determine whether the UE is applicable to the scheduling method of dynamic carrier frequency selection when the UE is not applicable to the scheduling method of dual carrier frequency transmission.

Specifically, the first determination unit includes: the first determination unit of the scheduling method, configured to have a power headroom when the UE transmits data with the power corresponding to the maximum SG on any of the dual carrier frequencies , and after allocating resources for the UE on the two coordinated cells according to the rate requested by the UE, the two coordinated cells are not overloaded, and when the evaluation result of the third evaluation unit is yes, determine that the A scheduling method in which the UE adopts dual-carrier frequency transmission; and a second determination unit for the scheduling method, configured to not have a power headroom when the UE transmits data with the power corresponding to the maximum SG on any carrier frequency in the dual-carrier frequency, Or when resources are allocated to the UE on the two coordinated cells according to the rate requested by the UE, when one of the two coordinated cells is overloaded, or when the evaluation result of the third evaluation unit is No, determine The UE does not apply the scheduling method of dual carrier frequency transmission.

The second determination unit includes: a first trigger unit, a second trigger unit, and an algorithm conversion unit,

The first triggering unit is configured to generate first triggering information when the evaluation result of the second evaluation unit is that the two coordinated cells are overloaded after allocating resources for the UE, and send the algorithm conversion unit the first trigger information;

The algorithm conversion unit is configured to, after receiving the first trigger information, change the scheduling method of the UE that has adopted the dual carrier frequency transmission scheduling method to a dynamic carrier frequency selection scheduling method so that the remaining two coordinated cells When resources change, generate notification information, and send the notification information to the second trigger unit;

The second trigger unit is configured to generate second trigger information after receiving the notification information sent by the algorithm conversion unit, and send the second trigger information to the second evaluation unit, and the second trigger information is used for The second evaluation unit is triggered to evaluate the load conditions of the two coordinated cells after resources are allocated to the UE on the two coordinated cells.

The base station device in the third embodiment flexibly selects a scheduling method for the UE according to information such as the rate requested by the UE, the amount of data, and the load conditions of the two coordinated cells when the UE requests resources; When allocating resources, change the remaining resources of the two cooperative cells with dual carrier frequencies by changing the scheduling method of the UE that has adopted the scheduling method of dual carrier frequency transmission to the scheduling method of dynamic carrier frequency selection, so that the base station can change the remaining resources of the two coordinated cells according to the rate requested by the UE. Based on the current load conditions of the two coordinated cells, a carrier is reasonably selected to transmit the data of the UE, which improves the system function and ensures the maximum throughput gain of the system.

When the load on the network side is light, the UE is a UE that has joined a dual-carrier coordinated cell; at this time, the base station equipment further includes:

The fourth evaluation unit is used to evaluate the load situation of the two coordinated cells when the scheduling method of the UE adopting the dynamic carrier selection scheduling method is changed to the scheduling method of dual carrier frequency transmission;

A fifth evaluation unit, configured to evaluate whether the UE has a power headroom when sending data with the power corresponding to the maximum authorized SG on any of the dual carrier frequencies;

At this time, the determining unit 301 is configured to prevent any cell in the two coordinated cells from being overloaded when the scheduling method of the UE is changed to the scheduling method of dual-carrier frequency transmission, and the UE operates on the dual-carrier frequency When there is a power margin when transmitting data on any carrier frequency corresponding to the maximum authorized SG, it is determined to change the scheduling method of the UE to a scheduling method of dual-carrier frequency transmission.

Wherein, the scheduling unit 302 includes: a sending unit, configured to send authorization information to the UE, and the authorization information includes: authorization values corresponding to two carrier frequencies; a receiving unit, configured to receive The SG values corresponding to two carrier frequencies are data sent on the two carrier frequencies, and the SG values corresponding to the two carrier frequencies are respectively obtained by the UE according to the authorization values corresponding to the two carrier frequencies.

In this case, when the load of the base station equipment in the third embodiment on the network side is relatively light, by changing the scheduling method of the UE that has adopted the dynamic carrier frequency selection scheduling method to the scheduling method of dual carrier frequency transmission, the two carriers Allocate resources for the UE on frequency to increase the rate at which the UE sends data.

Embodiment four:

Embodiment 4 of the present invention provides a communication system, which includes: a base station device communicably connected to a UE,

The base station equipment is configured to determine whether the UE adopts the scheduling method of dual-carrier frequency transmission or the scheduling method of dynamic carrier frequency selection according to the load conditions of the two coordinated cells of the dual-carrier frequency and the status of the user equipment UE; The scheduling method is to schedule the UE.

The communication system in Embodiment 4 of the present invention can determine whether the UE adopts the dual carrier frequency transmission scheduling method or the dynamic carrier frequency selection scheduling method according to the load conditions of the two coordinated cells with dual carrier frequencies and the status of the UE, which is flexible for the UE. By selecting a scheduling method, UEs can be scheduled in a multi-carrier frequency system, so that the throughput gain of the system is always at the maximum.

Those of ordinary skill in the art can understand that all or part of the steps in the methods of the above embodiments can be implemented through a program to instruct related hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory, Disk or CD, etc.

The scheduling method, base station equipment, and communication system provided by the embodiments of the present invention are described above in detail. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The descriptions of the above embodiments are only used to help understand the present invention. The method of the invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be understood To limit the present invention.

Claims (7)

1. A scheduling method, characterized in that, comprising: According to the load situation of the two coordinated cells of the dual carrier frequency and the status of the user equipment UE, it is evaluated whether the UE has a power headroom when sending data with the power corresponding to the maximum serving authorization SG on any carrier frequency of the dual carrier frequency; Evaluating whether any cell in the two coordinated cells is overloaded after allocating resources to the UE on the two coordinated cells according to the rate requested by the UE, where the UE is the UE that sends the scheduling information request resource; A scheduling method for evaluating whether the UE is suitable for dual-carrier frequency transmission according to the amount of data requested by the UE; If the UE has a power headroom when sending data on any of the dual carrier frequencies with the power corresponding to the maximum SG, and allocate resources to the UE on the two coordinated cells according to the rate requested by the UE The latter two coordinated cells are not overloaded, and when the UE is suitable for the scheduling method of dual-carrier frequency transmission according to the evaluation of the amount of data sent by the UE, determine that the UE adopts the scheduling method of dual-carrier frequency transmission; If the UE does not have a power headroom when sending data on any of the dual carrier frequencies with the power corresponding to the maximum SG, or assign the UE on the two coordinated cells according to the rate requested by the UE After resources, there is a cell overload in the two coordinated cells, or when it is estimated that the UE is not suitable for the scheduling method of dual-carrier frequency transmission according to the amount of data requested by the UE, determine that the UE is not suitable for the scheduling method of dual-carrier frequency transmission; Using the selected scheduling method, the UE is scheduled. 2. scheduling method according to claim 1, is characterized in that, When it is determined that the scheduling method of the UE is a scheduling method of dual-carrier frequency transmission, using the selected scheduling method to schedule the UE includes: sending authorization information to the UE, where the authorization information includes: authorization values corresponding to two carrier frequencies; receiving the data sent by the UE on the two carrier frequencies according to the service authorization values corresponding to the two carrier frequencies, the service authorization values corresponding to the two carrier frequencies are the UE according to the corresponding two carrier frequency The authorized value is obtained. 3. A scheduling method, characterized in that, comprising: According to the load situation of the two coordinated cells of the dual carrier frequency and the situation of the user equipment UE, A1. Evaluate whether allocating resources for the UE in the two coordinated cells causes overloading of both coordinated cells, if yes, perform A2, if not, determine that the UE is applicable to a dynamic carrier frequency selection scheduling method; A2. Change the scheduling method of the UE that has adopted the dual carrier frequency transmission scheduling method to a dynamic carrier frequency selection scheduling method to change the remaining resources of the two coordinated cells, and return to A1; The UE is a UE sending scheduling information to request resources; Using the selected scheduling method, the UE is scheduled. 4. The method according to claim 3, characterized in that the method further comprises: When allocating resources to the UE in the two coordinated cells results in overloading of the two coordinated cells, and there is no UE using the dual-carrier frequency transmission scheduling method in the two coordinated cells, it is determined that the UE A single-carrier access control method is adopted. 5. scheduling method according to claim 3, is characterized in that, When it is determined that the scheduling method of the UE is a scheduling method of dual-carrier frequency transmission, using the selected scheduling method to schedule the UE includes: sending authorization information to the UE, where the authorization information includes: authorization values corresponding to two carrier frequencies; receiving the data sent by the UE on the two carrier frequencies according to the service authorization values corresponding to the two carrier frequencies, the service authorization values corresponding to the two carrier frequencies are the UE according to the corresponding two carrier frequency The authorized value is obtained. 6. A scheduling method, characterized in that, comprising: According to the load situation of the two coordinated cells of dual carrier frequencies and the status of the user equipment UE; it is evaluated whether the scheduling method of the UE using the dynamic selection scheduling method is changed to the scheduling method of dual carrier frequency transmission. Any cell in the dual carrier frequency is overloaded; evaluate whether the UE has power headroom when sending data with the power corresponding to the maximum service authorization SG on any carrier frequency of the dual carrier frequency; the UE has joined the dual carrier frequency UE in the coordinated cell; If the scheduling method of the UE is changed to the scheduling method of dual-carrier frequency transmission, it will not cause any cell in the two coordinated cells to be overloaded, and the UE will use any carrier frequency in the dual-carrier frequency The power corresponding to the maximum SG has a power margin when sending data, and it is determined to change the scheduling method of the UE to a scheduling method of dual-carrier frequency transmission; Using the selected scheduling method, the UE is scheduled. 7. scheduling method according to claim 6, is characterized in that, When it is determined that the scheduling method of the UE is a scheduling method of dual-carrier frequency transmission, using the selected scheduling method to schedule the UE includes: sending authorization information to the UE, where the authorization information includes: authorization values corresponding to two carrier frequencies; receiving the data sent by the UE on the two carrier frequencies according to the service authorization values corresponding to the two carrier frequencies, the service authorization values corresponding to the two carrier frequencies are the UE according to the corresponding two carrier frequency The authorized value is obtained.

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