CN100450261C - A frequency allocation method for a mobile communication system - Google Patents

Abstract

The invention discloses a frequency distribution method for mobile communications system, which distribute fixed frequency to all business. The method also includes the following steps: A, Distribute fixed frequency band for specific operations and different dedicated; B, When do the implementation of its business, according to the network side of business needs, the use of fixed-frequency and / or for the exclusive distribution business band, downlink information and / or receiving UE sent uplink information to the user equipment UE issued. Application of this method of the invention can adapt to different needs of different business to uplink and downlink frequency, and reduce the frequency waste of resources.

Description

A frequency allocation method for a mobile communication system

technical field

The invention relates to a frequency allocation method of a mobile communication system.

Background technique

At present, the carrier frequency of the mobile communication system is predetermined and cannot be adjusted during system operation.

The development of modern mobile communication has mainly gone through two generations, and the third generation is now in the intensive development stage, and some manufacturers have launched experimental products. The third-generation mobile communication system is a system that can provide various types of high-quality multimedia services, can achieve global seamless coverage, has global roaming capabilities, and is compatible with fixed networks. Conduct any kind of communication system.

The goals of the third generation mobile communication system can be summarized as:

(1) Global roaming can be realized: users can roam in the whole system or even in the whole world, and can obtain quality-guaranteed services at different speeds and different motion states.

(2) A variety of services can be provided: services such as voice, variable-rate data, and active video, especially multimedia services.

The main services provided by mobile communications are still voice services and low-rate data services. Due to the development of the network, data and multimedia communication have a rapid development momentum, so the goal of the third generation mobile communication is broadband multimedia communication.

(3) Can adapt to various environments: It can integrate the existing public switched telephone network (PSTN), integrated service digital network, cordless system, ground mobile communication system, and satellite communication system to provide seamless coverage.

(4) Sufficient system capacity, powerful multi-user management capabilities, high security performance and high-quality services.

The third-generation mobile communication system was first proposed by the International Telecommunication Union (ITU) in 1985. It was called the Future Public Land Mobile Telecommunications System (FPLMTS, Future Public Land Mobile Telecommunications System) at that time, and was renamed IMT-2000 (International Mobile Telecommunications-2000 in 1996, International Mobile Communication-2000), which means that the system works in the 2000MHz frequency band, and the maximum service rate can reach 2000kbit/s. It is expected to be commercialized around 2000. Due to the large capacity of the Code Division Multiple Access (CDMA) system, equivalent to 10 to 20 times that of the analog system, and good compatibility with the analog system, CDMA technology has become the core technology of the third-generation mobile communication. The main systems are WCDMA, CDMA2000 and UWC-136.

The following takes the WCDMA system as an example to introduce the frequency allocation method in the prior art.

The WCDMA system mainly includes: core network, access network and user equipment. The core network is mainly for business processing, and the access network is mainly used for user equipment to access the system. The frequency spectrum used by WCDMA is: uplink: 1920-1980MHz, downlink: 2110-2170MHz. And the Americas: uplink: 1850~1910MHz, downlink: 1930~1990MHz. Of course, the use of other frequency bands is not excluded, but the uplink and downlink are also symmetrical. During the planning period of the WCDMA system, the frequency bands used for uplink and downlink have been allocated according to the above-mentioned regulations, and no adjustments are made to the frequency during the operation of the system.

It can be seen that in the existing WCDMA system, the uplink and downlink frequency divisions are symmetrical, that is, one uplink frequency band corresponds to one downlink frequency band, and the sizes of the uplink and downlink frequency bands are equal, and the downlink frequency band will carry all downlink services. That is, the current WCDMA system does not support asymmetrical frequency bands.

However, spectrum is a very important resource, and it is also very limited and precious. If used improperly, it will cause a great waste of resources.

Judging from the above-mentioned WCDMA frequency allocation technical scheme, the division of uplink and downlink frequency bands is fixed and completely symmetrical, but different services have different requirements for uplink and downlink frequency bands. Especially for third-generation mobile communication (3G) services, due to the gradual enrichment of 3G services, for example: some multimedia services, image transmission services, video telephony and other types of special services, data services will be in the future. Occupy a dominant position, that is, the downlink business volume will be much greater than the uplink traffic volume. Therefore, in terms of service characteristics, the asymmetry of uplink and downlink service volumes will result.

If the number of services provided by the network increases, but the existing spectrum is not enough, in order to support all services, the only way is to increase the spectrum. However, according to the existing mechanism, the uplink and downlink spectrum must be increased at the same time. The amount may not be large, because the uplink is basically only some small data blocks or part of the signaling transmission, so the utilization rate of the newly allocated uplink frequency band will be extremely low, so this symmetrical allocation of frequency bands will inevitably cause a huge uplink frequency band resource waste.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a frequency allocation method for a mobile communication system, which can adapt to different requirements of different services for uplink and downlink frequencies.

In order to achieve the above object, the technical solution of the present invention is specifically realized in the following way:

A frequency allocation method for a mobile communication system, which allocates the same fixed frequency band for all services, the method also includes the following steps:

A. Allocate dedicated frequency bands different from fixed frequency bands for specific services;

B. When executing a service, the network side uses a fixed frequency band and/or a dedicated frequency band allocated for the service to deliver downlink information to the user equipment UE and/or receive uplink information sent by the UE according to the needs of the service.

Wherein, the method for allocating fixed frequency bands for all services may be: allocating fixed frequency bands for all services before the system runs;

The method of allocating dedicated frequency bands different from fixed frequency bands for specific services in step A may be: assigning dedicated frequency bands different from fixed frequency bands to specific services according to the characteristics of specific services before or after system operation.

The specific service may be specified by the operator: broadcast/multicast service or 3G data service.

The method of allocating a dedicated frequency band different from the fixed frequency band for a specific service according to the characteristics of the specific service before or after the system is in operation can be:

According to the characteristics of the business, the same or different dedicated frequency bands are allocated for the uplink and downlink of the business; or only the dedicated frequency band is allocated for the downlink of the business, and the uplink is a fixed frequency band; or only the dedicated frequency band is allocated for the uplink of the business, and the downlink is a fixed frequency band.

The method of allocating a dedicated frequency band different from the fixed frequency band for the service according to the characteristics of the specific service before the system is running can also be:

The network side sets up a frequency band allocation table and a frequency band information table; the frequency band allocation table stores specific services and one or more corresponding frequency band numbers; the frequency band information table stores the frequency band size corresponding to each frequency band number and its position in the spectrum;

In the step B, the network side finds one or more frequency band numbers corresponding to the service and the size of the frequency band corresponding to each frequency band number and its position in the frequency spectrum according to the business to be executed in the frequency band allocation table and the frequency band information table. location, using one or more frequency bands corresponding to the service to deliver downlink information to the UE and/or receive uplink information sent by the UE.

Both the frequency band allocation table and the frequency band information table may be stored in the core network at the network side;

In the step B, the core network searches the frequency band allocation table and the frequency band information table according to the business to be executed, and finds one or more frequency band numbers corresponding to the business and the size of the frequency band corresponding to each frequency band number and its frequency range in the frequency spectrum. location, and notify the access network of the frequency band information;

According to the notification, the access network uses one or more frequency bands corresponding to the service to deliver downlink information to the UE and/or receive uplink information sent by the UE.

Both the frequency band allocation table and the frequency band information table may also be stored in the access network at the network side;

In the step B, the core network on the network side notifies the access network of the service to be executed;

The access network searches the frequency band allocation table and the frequency band information table according to the service to be executed, finds one or more frequency band numbers corresponding to the service, the size of the frequency band corresponding to each frequency band number and its position in the spectrum, and adopts the service The corresponding one or more frequency bands deliver downlink information to the UE and/or receive uplink information sent by the UE.

The frequency band allocation table may also be stored in the core network on the network side, and the frequency band information table may be stored in the access network on the network side;

In the step B, the core network on the network side searches for one or more frequency band numbers corresponding to the service according to the service to be executed in the frequency band allocation table, and sends the found frequency band number to the access network;

According to the frequency band number, the access network finds the size of the corresponding frequency band and its position in the frequency spectrum in the frequency band information table, and uses the frequency band corresponding to the frequency band number received from the core network to send downlink information to the UE and/or receive the UE transmission uplink information.

The process of allocating a dedicated frequency band different from the fixed frequency band for a specific service according to the characteristics of the specific service after the system starts running may include:

A1. After the network side judges that a new dedicated frequency band needs to be allocated according to the characteristics of the service to be executed and the system situation, step A2 is performed;

A2. Allocate one or more new dedicated frequency bands as the uplink and/or downlink frequency bands to perform specific services, then in step B, the network side uses the newly allocated one or more dedicated frequency bands to issue downlink information and /or receive uplink information sent by the UE.

If in the step A2, one or more dedicated frequency bands are allocated as the uplink and downlink frequency bands for which services will be performed, then in step B, the network side can use the newly allocated one or more dedicated frequency bands to issue downlink information and /or receive uplink information sent by the UE;

If one or more new dedicated frequency bands are allocated in step A2 as the uplink frequency bands to perform services, then in step B, the network side can use the fixed frequency bands to issue downlink information to the UE, and/or use the newly allocated one or more frequency bands a dedicated frequency band to receive the uplink information sent by the UE;

If in the step A2, one or more dedicated frequency bands are allocated as the downlink frequency bands to perform services, then in step B, the network side can use the newly allocated one or more dedicated frequency bands to send downlink information to the UE, and/ Or receive uplink information sent by the UE from a fixed frequency band.

In the step A1: the network side can judge whether it is necessary to allocate a new dedicated frequency band according to the characteristics of the service to be executed after judging that the service to be executed can be completed according to the current resource usage of the system and/or the load of the cell.

The method for the network side to judge whether the service to be executed can be completed according to the current resource usage of the system and/or the load of the cell can be as follows:

The network side counts the resources occupied by the system's currently executed services, obtains the remaining resources that the system can currently provide, and predicts the resources required by the services to be executed; judges whether the remaining resources meet the needs of the services to be executed, and if so, judges that the system is currently The resource situation can complete the business to be executed; otherwise, it is determined that the current resource situation of the system cannot complete the business to be executed;

The network side makes statistics on the current cell load of the system. If the cell load does not exceed the predetermined threshold, it is judged that the system can complete the business to be executed; otherwise, it is judged that the current cell load of the system is too heavy to complete the business to be executed.

The network side can pre-store the frequency band allocation table and the frequency band information table; the frequency band allocation table stores the service and its selectable frequency band number, and the identification of whether the frequency band corresponding to the frequency band number is used; the frequency band information table stores each frequency band number The size of the corresponding frequency band and its position in the spectrum; whether the frequency band is used or not, set to be valid after the frequency band is allocated to the service; set to be invalid after the service ends;

The step A2 is: the network side selects the frequency band number of one or more unused dedicated frequency bands corresponding to the service in the frequency band allocation table according to the service to be executed, and finds the corresponding frequency band number in the frequency band information table. The size of the frequency band and its position in the spectrum, and the dedicated frequency band is used as the uplink and/or downlink frequency band to perform services.

The frequency band allocation table and the frequency band information table can be stored in the core network of the network side;

The step A1 is: after the core network judges that the service to be performed needs to allocate a new dedicated frequency band according to the characteristics of the service to be performed, step A2 is performed;

Said step A2 is: the core network selects the frequency band number of one or more unused dedicated frequency bands corresponding to the service in the frequency band allocation table according to the service to be executed, and finds the frequency band number corresponding to the frequency band number in the frequency band information table. The size of the frequency band and its position in the frequency spectrum, the dedicated frequency band is used as the uplink and/or downlink frequency band to perform business, then the step B includes:

B1. The core network notifies the access network of the allocated frequency band information to be executed;

B2. According to the notification, the access network uses one or more newly allocated frequency bands to deliver downlink information to the UE and/or receive uplink information sent by the UE.

The frequency band allocation table and the frequency band information table may also be stored in the access network at the network side;

The step A1 is: after the core network judges that the service to be performed needs to allocate a new dedicated frequency band according to the characteristics of the service to be performed, step A2 is performed;

Described step A2 comprises:

A21. The core network notifies the access network of the services to be executed and the information about the need to allocate new dedicated frequency bands;

A22. According to the service to be executed, the access network selects the frequency band number of one or more unused dedicated frequency bands corresponding to the service in the frequency band allocation table, and finds the frequency band size corresponding to the frequency band number in the frequency band information table and its position in the frequency spectrum, the dedicated frequency band is used as the uplink and/or downlink frequency band to perform services, then the step B is: the access network uses one or more dedicated frequency bands newly allocated to issue downlink information to the UE And/or receive uplink information sent by the UE.

The frequency band allocation table may be stored in the core network of the network side, and the frequency band information table may be stored in the access network of the network side;

The step A1 is: after the core network judges that the business to be executed needs to allocate a new dedicated frequency band according to the system situation and business needs, then execute the step A2;

Described step A2 comprises:

A21, the core network selects the frequency band numbers of one or more unused dedicated frequency bands corresponding to the business in the frequency band allocation table according to the business to be executed;

A22. The core network notifies the access network of the assigned frequency band number of the dedicated frequency band to be executed;

A23. According to the received frequency band number, the access network finds the frequency band size corresponding to the frequency band number and its position in the frequency spectrum in the frequency band information table, and uses the dedicated frequency band corresponding to the frequency band number as the uplink and/or service to be performed or a downlink frequency band, then the step B is: the access network uses one or more newly allocated dedicated frequency bands to deliver downlink information to the UE and/or receive uplink information sent by the UE.

The uplink information may include uplink service information and/or uplink control information; the downlink information may include downlink service information and/or downlink control information.

It can be seen from the above technical solution that the method for dynamic frequency allocation of the mobile communication system of the present invention allocates a dedicated frequency band different from the fixed frequency band for specific services on the basis of allocating the same fixed frequency band for all services in the prior art; When executing a service, the network side uses a fixed frequency band and/or a dedicated frequency band allocated for the service according to the business needs, and sends downlink information to the user equipment UE and/or receives uplink information sent by the UE. That is to say, the present invention can implement a certain service on a fixed frequency band and/or a dedicated frequency band allocated for a certain service according to different service needs, so it can adapt to different demands of different services on uplink and downlink frequencies.

In addition, the present invention can allocate new downlink frequency bands and/or uplink frequency bands for specific business characteristics after the system starts running, and can also increase uplink and downlink frequency bands at the same time according to different service characteristics, reducing the need for blindly increasing uplink frequency bands at the same time. , The waste of frequency band resources caused by the downlink frequency band.

Description of drawings

Fig. 1 is the flow process that adopts dedicated frequency band to transmit business in the first preferred embodiment of the present invention;

Fig. 2 is the process of adopting the dedicated frequency band to transmit services in the second preferred embodiment of the present invention;

Fig. 3 is the process flow of dynamic frequency allocation in the third preferred embodiment of the present invention;

Fig. 4 is a flowchart of dynamic frequency allocation in the fourth preferred embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

The main idea of the frequency allocation method for this mobile communication system of the present invention is: on the basis of allocating the same fixed frequency band for all services in the prior art, assign a dedicated frequency band different from the fixed frequency band for specific services; According to service requirements, the network side uses a fixed frequency band and/or a dedicated frequency band allocated for the service to issue downlink information to the user equipment UE and/or receive uplink information sent by the UE.

The downlink information may include: downlink service information and/or downlink control information; the uplink information may include: uplink service information and/or uplink control information.

The present invention can allocate fixed frequency bands for all services by adopting the method in the prior art before system operation, and allocate dedicated frequency bands different from fixed frequency bands for specific services designated by operators according to service characteristics before system operation or after starting operation. For example: Before the system is running or after starting to run, allocate dedicated frequency bands for the broadcast/multicast service or each 3G characteristic service according to the service characteristics of the broadcast/multicast service or each 3G characteristic service. When allocating dedicated frequency bands, the same or different dedicated frequency bands can be allocated for uplink and downlink of services, and dedicated frequency bands can also be allocated for downlink of services, and fixed frequency bands can be used for uplink; or dedicated frequency bands can be allocated for uplink of services, and fixed frequency bands can be used for downlink.

The present invention has at least the following two implementations:

The first type: Before the system is running, allocate fixed frequency bands for all services, and allocate different dedicated frequency bands for specific services according to service characteristics, use dedicated frequency bands to implement special services, or use fixed frequency bands and dedicated frequency bands to cooperate to execute the business.

The second type: Before the system is in operation, allocate fixed frequency bands for all services, and allocate dedicated frequency bands for specific services according to service characteristics after the system starts to operate, and use dedicated frequency bands to implement special services, or use fixed frequency bands and dedicated frequency bands to cooperate to execute the business.

The above two implementation manners will be described in detail below with preferred examples respectively.

First preferred embodiment:

This embodiment is the above-mentioned first implementation manner. In this embodiment, the network side sets the frequency band allocation table and the frequency band information table and stores them in the core network of the network side. The frequency band allocation table is shown in Table 1, which stores different services and one or more frequency band numbers corresponding to them, and the uplink or downlink service transmission applied to the service.

business name Dedicated frequency band Applied to uplink/downlink Business A Band 1, Band 2 Uplink Business B Band 3 downlink Business C Band 4 downlink Business D. Band 5 downlink Business E Band 6, Band 7 uplink and downlink ... ...

Table 1

The frequency band information table is shown in Table 2, which stores the frequency band size corresponding to each frequency band number and its position in the frequency spectrum. The frequency band sizes corresponding to the frequency band numbers may be the same or different.

serial number size position in the spectrum Band 1 5M From...MHZ to...MHZ

Band 2 3M From...MHZ to...MHZ Band 3 3M From...MHZ to...MHZ ... ... ...

Table 2

Referring to FIG. 1 , FIG. 1 is a flow chart of using a dedicated frequency band to transmit services in the first preferred embodiment of the present invention. The process includes the following steps:

In step 101, the core network on the network side is about to execute a certain service.

In this embodiment, it is assumed that a multimedia broadcast/multicast service (MBMS) service is to be implemented. In this embodiment, a dedicated frequency band is pre-allocated for the MBMS service, and the corresponding information is stored in a frequency band allocation table.

Step 102, look up the entry corresponding to the service from the core network to the frequency band allocation table.

Step 103, judging whether the corresponding entry is found, if yes, execute step 104; otherwise, execute step 106.

In this embodiment, it is assumed that the entry information corresponding to the MBMS service is: a dedicated frequency band is allocated, and the frequency band is used by the network side to deliver downlink service information and/or control information to the UE.

Step 104, according to the dedicated frequency band corresponding to the service in the frequency band allocation table, go to the frequency band information table, find out the frequency band information corresponding to the frequency band number, and notify the dedicated frequency band information in the entry information of the frequency band allocation table and the frequency band information table to Access Network.

Step 105, the access network uses the dedicated frequency band to execute the service according to the entry information of the frequency band allocation table and the dedicated frequency band information in the frequency band information table; or uses the fixed frequency band and the dedicated frequency band to cooperate to execute the service.

In this embodiment, since the dedicated frequency band allocated for the MBMS service is only used by the network side to deliver downlink service information and/or control information to the UE, in this step, the fixed frequency band and the dedicated frequency band are used to cooperate to execute the service, that is, The network side uses a dedicated frequency band to deliver downlink information to the UE, and the UE uploads uplink information to the network side in a fixed frequency band.

Step 106, the core network notifies the access network to execute the service, and the access network uses a fixed frequency band to execute the service. That is, the network side uses a fixed frequency band to deliver downlink information to the UE and/or receive uplink information sent by the UE.

Second preferred embodiment:

This embodiment is also the above-mentioned first implementation manner. In this embodiment, a frequency band allocation table and a frequency band information table are set on the network side and stored in the access network on the network side, and the core network and the access network cooperate to determine which frequency band to use to perform services.

Referring to FIG. 2 , FIG. 2 is a process of using a dedicated frequency band to transmit services in the second preferred embodiment of the present invention. The process includes the following steps:

In step 201, the core network on the network side is about to execute a certain service.

In this embodiment, it is assumed that the MBMS service is to be implemented. In this embodiment, a dedicated frequency band is pre-allocated for the MBMS service, and the corresponding information is stored in the frequency band allocation table in the access network.

In step 202, the core network notifies the access network that the service will be executed.

Step 203, the access network receives the notification, and looks up the entry corresponding to the service in the frequency band allocation table.

Step 204, judging whether the corresponding entry is found, if yes, execute step 205; otherwise, execute step 207.

In this embodiment, it is assumed that the entry information corresponding to the MBMS service is: a dedicated frequency band is allocated, and the frequency band is used by the network side to deliver downlink information to the UE.

Step 205, according to the dedicated frequency band corresponding to the service in the frequency band allocation table, search the dedicated frequency band information corresponding to the frequency band number in the frequency band information table.

In step 206, the access network uses the dedicated frequency band to execute the service according to the entry information of the frequency band allocation table and the dedicated frequency band information in the frequency band information table; or uses the fixed frequency band and the dedicated frequency band to cooperate to execute the service.

In this embodiment, since the dedicated frequency band allocated for the MBMS service is only used by the network side to deliver downlink information to the UE, in this step, the fixed frequency band and the dedicated frequency band are used to cooperate to execute the service, that is, the network side uses the dedicated frequency band to transmit the downlink information to the UE. The UE sends downlink information, and the UE uploads uplink information to the network side in a fixed frequency band.

Step 207, the access network uses a fixed frequency band to execute the service. That is, the network side uses a fixed frequency band to deliver downlink information to the UE and/or receive uplink information sent by the UE.

In the first implementation mode, the following methods can also be used to achieve:

The frequency band allocation table is stored in the core network on the network side, and the frequency band information table is stored in the access network on the network side. The core network on the network side finds one or more dedicated frequency bands corresponding to the service according to the service to be executed in the frequency band allocation table, and sends the found frequency bands to the access network. The access network finds the size of the corresponding dedicated frequency band and its position in the spectrum according to the frequency band to the frequency band information table, and uses the dedicated frequency band received from the core network to send downlink information to the UE and/or receive uplink information sent by the UE .

The third preferred embodiment:

This embodiment is the second implementation manner described above. That is, on the basis of the existing frequency allocation, after the system starts to operate, dynamically allocate a new dedicated frequency band for the service to be executed, and use the newly allocated dedicated frequency band to cooperate with the original fixed frequency band to execute the service.

In this embodiment, fixed frequency bands for uplink and downlink services have been allocated before the system runs. The allocation method is the same as that of the prior art, and will not be repeated here. Moreover, the core network at the network side pre-stores a frequency band allocation table and a frequency band information table. The frequency band allocation table of this embodiment is shown in Table 3, which stores services and their selectable frequency band numbers, and an identifier of whether the dedicated frequency band is used.

business name Optional frequency band Whether to use the logo Business A Band 1 efficient Business A Band 2 invalid Business B Band 3 invalid Business C Band 1 efficient Business C Band 3 invalid ... ... ...

table 3

Wherein, the optional dedicated frequency bands for each service may be the same or different. Whether the frequency band is used or not is set to be valid after the frequency band is allocated to the service; it is set to be invalid after the service ends. The frequency band information table is the same as that shown in Table 2 above, which stores the frequency band size corresponding to each frequency band number and its position in the frequency spectrum. The sizes of the frequency bands may be the same or different.

Referring to FIG. 3 , FIG. 3 is a flowchart of dynamic frequency allocation in a third preferred embodiment of the present invention. The process includes the following steps:

In step 301, the core network judges whether the service to be executed can be completed according to the current resource situation of the system and/or the load situation of the cell. If yes, go to step 302; otherwise, it is determined that the service to be executed needs to be allocated a new dedicated frequency band and go to step 304.

In this step, the method for the network side to determine whether the service to be executed can be completed according to the current resource usage of the system and/or the load of the cell may be as follows:

The network side counts the resources occupied by the system's currently executed services, obtains the remaining resources that the system can currently provide, and predicts the resources required by the services to be executed; judges whether the remaining resources meet the needs of the services to be executed, and if so, judges that the system is currently The resource situation can complete the business to be executed; otherwise, it is determined that the current resource situation of the system cannot complete the business to be executed. The system resource situation can be reflected by the transmit power of the base station and the number of used spreading codes.

The network side makes statistics on the current cell load of the system. If the cell load does not exceed the predetermined threshold, it is judged that the system can complete the business to be executed; otherwise, it is judged that the current cell load of the system is too heavy to complete the business to be executed.

The network side first judges whether the service to be performed can be completed according to the current resource usage of the system and/or the load of the cell. If so, it is determined that the service to be performed does not need to allocate a new dedicated frequency band; Determine whether a new dedicated frequency band needs to be allocated.

Step 302, judging whether a new dedicated frequency band needs to be allocated according to the characteristics of the service to be performed, and if so, performing step 304; otherwise, judging that the service to be performed does not need to allocate a new dedicated frequency band, performing step 303.

In this embodiment, it is determined whether the service to be executed needs to be allocated a new dedicated frequency band according to the current system resource situation and/or the load situation of the cell and the service characteristics. In practical applications, only the current system resource situation can be used. and/or the load condition of the cell, or only based on the service characteristics.

Step 303, use the allocated fixed frequency band before the system runs to execute the service. That is, the network side uses a fixed frequency band to deliver downlink information to the UE and/or receive uplink information sent by the UE.

Step 304, select one or more unused dedicated frequency bands corresponding to the service to be executed in the frequency band allocation table, and find the frequency band size corresponding to the frequency band number and its position in the frequency spectrum in the frequency band information table, and place the The dedicated frequency band is used as the uplink or downlink frequency band where the business will be performed.

For example, for the MBMS service, the downlink traffic volume is relatively large. In this embodiment, the newly allocated frequency band can be used as the downlink frequency band for transmitting the downlink information of the MBMS service. Similarly, if there is a large amount of uplink traffic for a certain service, in this embodiment, the newly allocated frequency band can be used as the uplink frequency band for transmitting the uplink information of the service. Of course, this kind of business is very rare.

In this step, if no unused dedicated frequency band corresponding to the service to be served is found in the frequency band allocation table, return to step 303 .

Step 305, setting the used flag of the dedicated frequency band selected in the frequency band information table to valid, that is, the dedicated frequency band has been used.

Step 306, the core network notifies the access network of the allocated frequency band information to be executed;

Step 307: According to the notification, the access network uses the newly allocated frequency band to transmit the uplink or downlink information of the service; uses the fixed frequency band corresponding to the service to transmit the downlink or uplink information.

For example: For MBMS services, the newly assigned dedicated frequency band can be used to transmit downlink information, and the fixed frequency band can be used to transmit uplink information.

In step 308, the service ends, and the core network sets the used flag of the dedicated frequency band allocated for this service to invalid, that is, the dedicated frequency band is not used.

The fourth preferred embodiment: this embodiment is the above-mentioned second implementation manner.

In this embodiment, fixed frequency bands have been allocated before the system runs, and the allocation method is the same as that of the prior art, and will not be repeated here.

In addition, the access network on the network side pre-stores a frequency band allocation table and a frequency band information table. The contents of these two tables are the same as those in Embodiment 4, except that the storage locations are different.

Referring to FIG. 4, FIG. 4 is a flowchart of dynamic frequency allocation in a fourth preferred embodiment of the present invention. The process includes the following steps:

In step 401, the core network judges whether the service to be executed can be completed according to the current resource situation of the system and/or the load situation of the cell. If yes, go to step 402; otherwise, it is determined that the service to be executed needs to be allocated a new dedicated frequency band and go to step 403.

Step 402, judging whether a new dedicated frequency band needs to be allocated according to the characteristics of the service to be performed, and if so, performing step 403; otherwise, judging that the service to be performed does not need to allocate a new dedicated frequency band, performing step 405.

Step 403 , the core network sends the information about the service to be executed and the new dedicated frequency band to be allocated to the access network, and notifies the access network to allocate a new dedicated frequency band for the service to be executed.

In step 404, the access network judges whether it has received the notification of allocating a new dedicated frequency band sent by the core network, and if so, executes step 406; otherwise, executes step 405.

Step 405, use the allocated fixed frequency band before the system runs to execute the service. That is, the network side uses a fixed frequency band to deliver downlink information to the UE and/or receive uplink information sent by the UE.

Step 406, select one or more unused dedicated frequency bands corresponding to the service to be executed in the frequency band allocation table, and find the frequency band size corresponding to the frequency band number and its position in the frequency spectrum in the frequency band information table, and place the The dedicated frequency band is used as the uplink or downlink frequency band where the business will be performed.

In this step, if no unused dedicated frequency band corresponding to the service to be served is found in the frequency band allocation table, then return to step 405 .

In step 407, the used flag of the dedicated frequency band selected in the frequency band information table is set to valid, that is, the dedicated frequency band has been used.

Step 408, the access network uses the newly allocated dedicated frequency band to transmit the uplink or downlink information of the service; uses the fixed frequency band corresponding to the service to transmit the downlink or uplink information.

For example: For MBMS business, the newly allocated dedicated frequency band can be used to transmit downlink information, and the fixed frequency band allocated before the system operation can be used to transmit uplink information.

Step 409, when the service ends, the access network sets the used flag of the dedicated frequency band allocated for this service to invalid, that is, the dedicated frequency band is not used.

In the above two embodiments, both the frequency band allocation table and the frequency band information table are stored in the core network or both are stored in the access network. In practical applications, the frequency band allocation table can also be stored in the core network on the network side, and the frequency band information table stored in the access network on the network side.

In this way, after determining that a new dedicated frequency band needs to be allocated, the core network selects one or more unused dedicated frequency bands corresponding to the service in the frequency band allocation table according to the service to be executed. Then the access network is notified of the allocated dedicated frequency band to execute the service. According to the received frequency band, the access network searches the frequency band information table for the size of the frequency band corresponding to the frequency band number and its position in the frequency spectrum, and uses the dedicated frequency band as the uplink or downlink frequency band to perform services. The access network uses the newly allocated dedicated frequency band to transmit the uplink or downlink information of the service; correspondingly, the fixed frequency band corresponding to the service is used to transmit the downlink or uplink information.

The mobile communication systems in the above four embodiments may be: WCDMA system; or CDMA2000 system; or UTRA TDD system; or mobile communication systems such as TD-SCDMA system.

It can be seen from the above four embodiments that the frequency allocation method of the mobile communication system of the present invention can adapt to the different requirements of different services for the uplink and downlink carrier frequencies, and reduces the frequency band caused by simultaneously increasing the uplink and downlink frequency bands. Waste of resources.

Claims (17)

1, a kind of frequency allocation method of mobile communication system, allocate fixed frequency band for all services, it is characterized in that, this method also comprises the following steps: A. Allocate dedicated frequency bands different from fixed frequency bands for specific services; B. When executing a service, the network side uses a fixed frequency band and/or a dedicated frequency band allocated for the service to deliver downlink information to the user equipment UE and/or receive uplink information sent by the UE according to the needs of the service. 2. The frequency allocation method according to claim 1, wherein the method for allocating fixed frequency bands for all services is: allocating fixed frequency bands for all services before the system runs; The method of allocating dedicated frequency bands different from fixed frequency bands for specific services described in step A is: before system operation or after starting to operate, allocate dedicated frequency bands different from fixed frequency bands for specific services according to the characteristics of specific services. 3. The frequency allocation method according to claim 2, characterized in that: said specific service is specified by the operator: broadcast/multicast service or 3G data service. 4. The frequency allocation method according to claim 2, characterized in that, the method of allocating a dedicated frequency band different from the fixed frequency band for the service according to the characteristics of the specific service before the system runs or after starting to run is: According to the characteristics of the business, the same or different dedicated frequency bands are allocated for the uplink and downlink of the business; or only the dedicated frequency band is allocated for the downlink of the business, and the uplink is a fixed frequency band; or only the dedicated frequency band is allocated for the uplink of the business, and the downlink is a fixed frequency band. 5. The frequency allocation method according to claim 2 or 4, characterized in that the method of allocating a dedicated frequency band different from the fixed frequency band for the service according to the characteristics of the specific service before the system is running is: The network side sets up a frequency band allocation table and a frequency band information table; the frequency band allocation table stores specific services and one or more corresponding frequency band numbers; the frequency band information table stores the frequency band size corresponding to each frequency band number and its position in the spectrum; In the step B, the network side finds one or more frequency band numbers corresponding to the service and the size of the frequency band corresponding to each frequency band number and its position in the frequency spectrum according to the business to be executed in the frequency band allocation table and the frequency band information table. location, using one or more frequency bands corresponding to the service to deliver downlink information to the UE and/or receive uplink information sent by the UE. 6. The frequency allocation method according to claim 5, characterized in that, both the frequency band allocation table and the frequency band information table are stored in the core network at the network side; In the step B, the core network searches the frequency band allocation table and the frequency band information table according to the business to be executed, and finds one or more frequency band numbers corresponding to the business and the size of the frequency band corresponding to each frequency band number and its frequency range in the frequency spectrum. location, and notify the access network of the frequency band information; According to the notification, the access network uses one or more frequency bands corresponding to the service to deliver downlink information to the UE and/or receive uplink information sent by the UE. 7. The frequency allocation method according to claim 5, characterized in that, both the frequency band allocation table and the frequency band information table are stored in the access network at the network side; In the step B, the core network on the network side notifies the access network of the service to be executed; The access network searches the frequency band allocation table and the frequency band information table according to the service to be executed, finds one or more frequency band numbers corresponding to the service, the size of the frequency band corresponding to each frequency band number and its position in the spectrum, and adopts the service The corresponding one or more frequency bands deliver downlink information to the UE and/or receive uplink information sent by the UE. 8. The frequency allocation method according to claim 5, wherein the frequency band allocation table is stored in the core network on the network side, and the frequency band information table is stored in the access network on the network side; In the step B, the core network on the network side searches for one or more frequency band numbers corresponding to the service according to the service to be executed in the frequency band allocation table, and sends the found frequency band number to the access network; According to the frequency band number, the access network finds the size of the corresponding frequency band and its position in the frequency spectrum in the frequency band information table, and uses the frequency band corresponding to the frequency band number received from the core network to send downlink information to the UE and/or receive the UE transmission uplink information. 9. The frequency allocation method according to claim 2 or 4, characterized in that the process of allocating a dedicated frequency band different from the fixed frequency band for a specific service according to the characteristics of the specific service after the system starts running includes: A1. After the network side judges that a new dedicated frequency band needs to be allocated according to the characteristics of the service to be executed and the system situation, step A2 is performed; A2. Allocate one or more new dedicated frequency bands as the uplink and/or downlink frequency bands to perform specific services, then in step B, the network side uses the newly allocated one or more dedicated frequency bands to issue downlink information and /or receive uplink information sent by the UE. 10. The frequency allocation method according to claim 9, characterized in that: If the new one or more dedicated frequency bands are allocated in the step A2 as the uplink and downlink frequency bands to perform services, then in step B, the network side uses the newly allocated one or more dedicated frequency bands to issue downlink information and/or to the UE or receive uplink information sent by the UE; If one or more new dedicated frequency bands are assigned in step A2 as the uplink frequency bands to perform services, then in step B, the network side uses fixed frequency bands to issue downlink information to the UE, and/or the newly allocated one or more The dedicated frequency band receives the uplink information sent by the UE; If in the step A2, one or more dedicated frequency bands are allocated as the downlink frequency bands for which services will be performed, then in step B, the network side uses the newly allocated one or more dedicated frequency bands to issue downlink information to the UE, and/or Receive the uplink information sent by the UE from the fixed frequency band. 11. The frequency allocation method according to claim 9, characterized in that: in the step A1: The network side first judges that the service to be executed can be completed according to the current resource usage of the system and/or the load of the cell, and then judges whether a new dedicated frequency band needs to be allocated according to the characteristics of the service to be executed. 12. The frequency allocation method according to claim 11, wherein the method for the network side to judge whether the service to be executed can be completed according to the current resource usage of the system and/or the load of the cell is as follows: The network side counts the resources occupied by the system's currently executed services, obtains the remaining resources that the system can currently provide, and predicts the resources required by the services to be executed; judges whether the remaining resources meet the needs of the services to be executed, and if so, judges that the system is currently The resource situation can complete the business to be executed; otherwise, it is determined that the current resource situation of the system cannot complete the business to be executed; The network side makes statistics on the current cell load of the system. If the cell load does not exceed the predetermined threshold, it is judged that the system can complete the business to be executed; otherwise, it is judged that the current cell load of the system is too heavy to complete the business to be executed. 13. The frequency allocation method according to claim 9, characterized in that: the network side pre-stores a frequency band allocation table and a frequency band information table; the frequency band allocation table stores services and their selectable frequency band numbers, and the corresponding frequency band numbers The identification of whether the frequency band is used; the frequency band information table stores the size of the frequency band corresponding to each frequency band number and its position in the spectrum; the identification of whether the frequency band is used is set to be valid after the frequency band is allocated to the service; Set to invalid after the end; The step A2 is: the network side selects the frequency band number of one or more unused dedicated frequency bands corresponding to the service in the frequency band allocation table according to the service to be executed, and finds the corresponding frequency band number in the frequency band information table. The size of the frequency band and its position in the spectrum, and the dedicated frequency band is used as the uplink and/or downlink frequency band to perform services. 14. The frequency allocation method according to claim 13, characterized in that: the frequency band allocation table and the frequency band information table are stored in the core network of the network side; The step A1 is: after the core network judges that the service to be performed needs to allocate a new dedicated frequency band according to the characteristics of the service to be performed, step A2 is performed; Said step A2 is: the core network selects the frequency band number of one or more unused dedicated frequency bands corresponding to the service in the frequency band allocation table according to the service to be executed, and finds the frequency band number corresponding to the frequency band number in the frequency band information table. The size of the frequency band and its position in the frequency spectrum, the dedicated frequency band is used as the uplink and/or downlink frequency band to perform business, then the step B includes: B1. The core network notifies the access network of the allocated frequency band information to be executed; B2. According to the notification, the access network uses one or more newly allocated frequency bands to deliver downlink information to the UE and/or receive uplink information sent by the UE. 15. The frequency allocation method according to claim 13, characterized in that: the frequency band allocation table and the frequency band information table are stored in the access network at the network side; The step A1 is: after the core network judges that the service to be performed needs to allocate a new dedicated frequency band according to the characteristics of the service to be performed, step A2 is performed; Described step A2 comprises: A21. The core network notifies the access network of the business to be executed and the information that needs to allocate a new dedicated frequency band; A22. According to the service to be executed, the access network selects the frequency band number of one or more unused dedicated frequency bands corresponding to the service in the frequency band allocation table, and finds the frequency band size corresponding to the frequency band number in the frequency band information table and its position in the frequency spectrum, the dedicated frequency band is used as the uplink and/or downlink frequency band to perform services, then the step B is: the access network uses one or more dedicated frequency bands newly allocated to issue downlink information to the UE And/or receive uplink information sent by the UE. 16. The frequency allocation method according to claim 13, wherein the frequency band allocation table is stored in the core network on the network side, and the frequency band information table is stored in the access network on the network side; The step A1 is: after the core network judges that the business to be executed needs to allocate a new dedicated frequency band according to the system situation and business needs, then execute the step A2; Described step A2 comprises: A21, the core network selects the frequency band numbers of one or more unused dedicated frequency bands corresponding to the business in the frequency band allocation table according to the business to be executed; A22. The core network notifies the access network of the assigned frequency band number of the dedicated frequency band to be executed; A23. According to the received frequency band number, the access network searches the frequency band information table for the frequency band size corresponding to the frequency band number and its position in the spectrum, and uses the dedicated frequency band corresponding to the frequency band number as the uplink and/or service to be performed or a downlink frequency band, then the step B is: the access network uses one or more newly allocated dedicated frequency bands to deliver downlink information to the UE and/or receive uplink information sent by the UE. 17. The frequency allocation method according to claim 1, characterized in that: said uplink information includes uplink service information and/or uplink control information; said downlink information includes downlink service information and/or downlink control information.

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