WO2007033586A1

WO2007033586A1 - A method and device for allocating frequency in mobile communication system

Info

Publication number: WO2007033586A1
Application number: PCT/CN2006/002447
Authority: WO
Inventors: Bing Xu; Hao Hu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-09-20
Filing date: 2006-09-19
Publication date: 2007-03-29
Also published as: CN100450261C; CN1937824A

Abstract

A method and device for allocating frequency in mobile communication system, allocating regular frequency band for all services, and allocating dedicated frequency band that is different from the regular frequency band for special services; when performing a service, the network side uses regular frequency band and/or allocates dedicated frequency band for the service according service request, and sends downlink information to the user equipment UE and/or receives uplink information sent by UE. By using the method and device according to present invention, we can adapt the different request of different services for uplink/downlink frequency, and can reduce frequency band resource waste.

Description

Frequency allocation method and device for mobile communication system

The present invention relates to a frequency allocation method and apparatus for a mobile communication system. Background of the invention

At present, the frequency of the carrier of the mobile communication system is pre-defined, and it cannot be adjusted during system operation.

Modern mobile communication has developed to the present, mainly through two generations, and the third generation is now in the intense development stage, and some manufacturers have already launched experimental products. The third generation mobile communication system is a multi-type, high-quality multimedia service that provides global seamless coverage, global roaming capability, compatibility with fixed networks, and small portable terminals at any time, anywhere. A system for conducting any kind of communication.

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

(1) Global roaming: Users can roam throughout the system and even globally, and can obtain quality-assured services at different speeds and different sports.

(2) Can provide a variety of services: provide voice, variable rate data, active video, non-voice, etc., especially multimedia services.

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

(3) Can adapt to a variety of environments: It can integrate existing public telephone switching network (PSTN), integrated services digital network, cordless system, terrestrial mobile communication system, satellite communication system to provide seamless coverage. (4) Sufficient system capacity, powerful multiple 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 Telecommunication System (FPLMTS). In 1996, it was renamed IMT-2000 (International Mobile Telecommunication- 2000, International Mobile Telecommunications-2000), which means that the system works in the 2000MHz frequency band, and the highest service rate can reach 2000kbit/s. It is expected to be commercialized around 2000. Since the code division multiple access (CDMA) system has a large capacity, which is 10 to 20 times that of the analog system, and has good compatibility with the analog system, CDMA technology has become the core technology of the third generation mobile communication. The main system is WCDMA. CDMA2000 and UWC-136.

The WCDMA system is taken as an example to introduce the prior art frequency allocation method.

The WCDMA system mainly includes: a core network, an access network, and user equipment. The core network mainly performs service processing, and the access network is mainly used for user equipment access systems. The spectrum used by WCDMA is: Upstream: 1920 ~ 1980MHz, Downstream: 2110 ~ 2170MHz. In the Americas: Up: 1850 - 1910MHz, Down: 1930 ~ 1990MHz. Of course, other bands are not excluded, but the uplink and downlink are also symmetric. During the planning period, the WCDMA system has allocated the frequency bands used for uplink and downlink according to the above-mentioned regulations. During the operation of the system, no adjustment is made to the frequency.

It can be seen that in the existing WCDMA system, the uplink and downlink frequency division is symmetric, that is, one uplink frequency band corresponds to one downlink frequency band, and the uplink and downlink frequency segments are equal in size, and the downlink frequency band will carry all downlink services. That is to say, the current asymmetric frequency segment is not supported in WCDMA systems.

However, spectrum is a very important resource and is very limited and precious. If used improperly, it will cause great waste of resources. From the above technical solution of WCDMA frequency allocation, the division of the uplink and downlink frequency bands is fixed and completely symmetrical, but the requirements of the upper and lower frequency bands of different services are not completely the same. Especially for the third generation mobile communication (3G) service, 3G services are gradually enriched, for example: Some types of special services such as multimedia services, image transmission services, video telephony, etc. have appeared, and data services will be in the future. Dominant, that is, the amount of downlink traffic will be much larger than the uplink traffic. Therefore, from the perspective of business characteristics, the asymmetry of uplink and downlink traffic will be caused.

If the services provided by the network increase, but the existing spectrum is insufficient, in order to support all services, the spectrum can only be increased. However, according to the existing mechanism, it is necessary to simultaneously increase the frequency of the uplink and downlink, and at this time, the uplink service. The amount may not be large. Since the uplink is basically only some small data blocks or part of the signaling transmission, the newly allocated uplink frequency band utilization rate will be extremely low. Therefore, the symmetric allocation of the frequency band will inevitably cause the uplink frequency band resources to be extremely large. waste. Summary of the invention

In view of this, the main object of the present invention is to provide a frequency allocation method and apparatus 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 present invention provides a frequency allocation method for a mobile communication system, which allocates the same fixed frequency band for all services, and the method further comprises the following steps:

A. Assign a dedicated frequency band different from the fixed frequency band for a specific service;

B. When performing the service, the network side sends the downlink information to the user equipment UE and/or receives the uplink information sent by the UE according to the service requirement, using the fixed frequency band and/or the dedicated frequency band allocated for the service.

The method for allocating a fixed frequency band for all services may be: The method for allocating a dedicated frequency band different from a fixed frequency band for a specific service according to step A may be: before the system is running or after starting the operation, according to the specific service The feature is that the service is assigned a different frequency than the fixed frequency band. Use the frequency band.

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

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

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

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

The frequency band allocation table and the frequency band information table are set on the network side; the frequency band allocation table stores a specific service and one or more corresponding frequency band numbers; the frequency band information table stores the frequency band corresponding to each frequency band number and its position in the frequency spectrum;

In the step B, the network side finds one or more frequency bands corresponding to the service and the size of each frequency band and the position in the frequency spectrum according to the service to frequency band allocation table and the frequency band information table to be executed, and adopts the service. The corresponding one or more frequency bands send 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 all be stored in the core network on the network side. In the step B, the core network finds the corresponding service according to the service to be allocated to the frequency band allocation table and the frequency band information table. One or more frequency bands and the size of each frequency band and its location in the frequency spectrum, and inform the access network of the frequency band information;

The access network sends the downlink information to the UE and/or the uplink information sent by the UE according to the notification, using one or more frequency bands corresponding to the service.

The frequency band allocation table and the frequency band information table may also be stored in an access network on the network side; In the step B, the core network on the network side notifies the access network to perform the service; the access network finds one or more frequency bands corresponding to the service according to the service to be allocated to the frequency band allocation table and the frequency band information table. And the size of each frequency band and its position in the frequency spectrum, the downlink information is sent to the UE and/or the uplink information sent by the UE is received by using one or more frequency bands corresponding to the service.

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

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

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

After the system starts running, the process of allocating a dedicated frequency band different from the fixed frequency band for the specific service according to the service characteristic may include:

A1. The network side determines whether it is necessary to allocate a new dedicated frequency band according to the characteristics of the service to be performed and/or the system condition. If yes, step A2 is performed; otherwise, step B uses the fixed frequency band to perform the service;

A2. Allocating one or more new dedicated frequency bands as the uplink and/or downlink frequency bands to be performed for the specific service, in the step B, the network side sends the downlink information to the UE by using the newly allocated one or more dedicated frequency bands. / or receive uplink information sent by the UE.

If the new one or more dedicated frequency bands are allocated as the uplink and downlink frequency bands to be performed in the step A2, in the step B, the network side may send the downlink information to the UE by using the newly allocated one or more dedicated frequency bands. / or receiving uplink information sent by the UE;

If the new one or more dedicated frequency bands are allocated in the step A2 as the service to be executed In the uplink frequency band, in step B, the network side may send downlink information to the UE by using a fixed frequency band, and/or receive uplink information sent by the UE from the newly allocated one or more dedicated frequency bands; if the new information is allocated in the step A2 One or more dedicated frequency bands are used as the downlink frequency band to be performed. In step B, the network side may send downlink information to the UE by using the newly allocated one or more dedicated frequency bands, and/or receive uplinks sent by the UE from the fixed frequency band. information.

In the step A1, the network side may first determine whether the service to be executed can be completed according to the current resource usage of the system and/or the load condition of the cell, and if yes, determine whether a new dedicated frequency band needs to be allocated according to the characteristics of the service to be executed. Otherwise, it is determined that the business to be executed needs to allocate a new dedicated frequency band.

The network side may 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 an identifier of whether the frequency band is used; the frequency band information table stores the frequency band size corresponding to each frequency band number. And its position in the spectrum; whether the frequency band is used for identification, is set to be valid after the frequency band is allocated to the service; and is set to be invalid after the service ends;

The step A2 is: the network side 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, and finds the frequency band corresponding to the frequency band number in the frequency band information table. And its location in the spectrum, which will be dedicated to the upstream and/or downstream frequency bands of the service to be performed.

The frequency band allocation table and the frequency band information table may be stored in the core network on the network side; the step A1 is: the core network needs to determine whether the service to be executed needs to allocate a new dedicated frequency band according to the characteristics of the service to be executed, if If yes, execute step A2; no, ij, step B uses a fixed frequency band to perform the service;

The step A2 is: 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, and finds the frequency band corresponding to the frequency band number in the frequency band information table. And its location in the spectrum, The uplink and/or downlink frequency bands of the service to be performed, then the step B includes:

Bl. The core network notifies the access network of the allocated frequency band information of the service to be performed;

B2. The access network sends downlink information to the UE and/or receives uplink information sent by the UE by using the newly allocated one or more frequency bands according to the notification.

The frequency band allocation table and the frequency band information table may also be stored in the access network on the network side; the step A1 is: the core network determines whether the service to be executed needs to allocate a new dedicated frequency band according to the characteristics of the service to be performed, If yes, perform step A2; otherwise, step B uses the fixed frequency band to perform the service;

The step A2 includes:

A21. The core network notifies the access network of the service to be performed and the information about the need to allocate a new dedicated frequency band;

A22. The access 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 performed, and finds the frequency band corresponding to the frequency band number in the frequency band information table and The location in the spectrum, the dedicated frequency band is used as the uplink and/or downlink frequency band to be performed, and the step B is: the access network sends downlink information and/or downlink information to the UE by using the newly allocated one or more dedicated frequency bands. Receive uplink information sent by the UE.

The step A1 is: the core network determines whether the service to be executed needs to allocate a new dedicated frequency band according to the system condition or/and the service requirement, and if yes, performs step A2; otherwise, the fixed frequency band is used to perform the service in step B;

The step A2 includes:

A21. 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 performed;

A22. The core network notifies the access network of the allocated dedicated frequency band to be performed; A23. The access network finds the size of the frequency band corresponding to the frequency band number and its location in the frequency spectrum according to the received dedicated frequency band, and uses the dedicated frequency band as the uplink and/or downlink frequency band to be performed. The step B is that the access network sends downlink information to the UE and/or receives uplink information sent by the UE by using the newly allocated one or more dedicated frequency bands.

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

In another aspect of the present invention, the present invention provides a frequency allocation apparatus for a mobile communication system, which is disposed on a network side, and includes: a frequency band allocation module and a service execution module; and the frequency band allocation module, which allocates all services. Fixed frequency band, and allocates a dedicated frequency band different from the fixed frequency band for a specific service, and notifies the service execution module of the allocation; the service execution module uses a fixed frequency band and/or according to the service requirement and the notification of the frequency band allocation module The dedicated frequency band allocated by the service sends downlink information to the user equipment UE and/or receives uplink information sent by the UE.

The frequency band allocation module may include a frequency band allocating unit and a frequency band information storage unit;

The frequency band allocating unit allocates the same or different dedicated frequency bands for uplink and downlink of a specific service according to the service characteristics of the mobile communication system; or allocates a dedicated frequency band only for downlink of a specific service, and acts as a fixed frequency band; or only for a specific frequency band; The uplink frequency allocation special frequency band of the service acts as a fixed frequency band, and stores the allocated frequency band information in the frequency band information storage unit to notify the service execution module of the frequency band allocation situation;

The frequency band information storage unit stores frequency band information including a specific service and its corresponding one or more frequency band numbers, and a frequency band corresponding to each frequency band number and a position in the frequency spectrum;

The service execution module determines, according to the service requirement and the frequency band allocation situation sent by the frequency band allocating unit, the frequency band to be used, and obtains the solid to be used by the frequency band information storage unit. The frequency band information and/or the frequency band information of the dedicated frequency band allocated for the service, the fixed frequency band and/or the dedicated frequency band allocated for the service, are used to send downlink information to the user equipment UE and/or receive uplink information sent by the UE.

The device may further include a frequency band selection module;

The frequency band information storage unit further stores an identifier of whether each frequency band allocated for each specific service is used;

And the service execution module further sends a selection of an available frequency band command to the frequency band selection module, and receives an optional frequency band returned by the frequency band selection module, and obtains frequency band information of the optional frequency band from the frequency band information storage unit;

The frequency band selection module, according to the selected available frequency band command sent by the service execution module, goes to the frequency band information storage unit to find the frequency band allocated for the specific service and identified as unused, and returns the frequency band information of the frequency band to the service execution. Module.

The foregoing technical solution can be seen that the frequency allocation method and apparatus for the mobile communication system of the present invention allocates a dedicated frequency band different from the fixed frequency band for a specific service on the basis of the prior art allocating the same fixed frequency band for all services; When performing the service, the network side sends the downlink information to the user equipment UE and/or receives the uplink information sent by the UE according to the service requirement, using the fixed frequency band and/or the dedicated frequency band allocated for the service. That is to say, the present invention can perform a certain service on a fixed frequency band and/or a dedicated frequency band allocated for a service for different service needs, and thus 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 services according to characteristics of specific services after the system starts running, and can also increase uplink and downlink frequency bands according to different service characteristics, thereby reducing the blind increase at the same time. The frequency band resources brought by the downlink frequency band are wasted. Drawing tube

1 is a flow chart of a service transmission using a dedicated frequency band in a first preferred embodiment of the present invention; FIG. 2 is a flow chart of a service transmission using a dedicated frequency band in a second preferred embodiment of the present invention; FIG. 3 is a third preferred embodiment of the present invention. FIG. 4 is a flowchart of performing dynamic frequency allocation in a fourth preferred embodiment of the present invention; and FIG. 5 is a schematic structural diagram of a frequency allocation apparatus according to a fifth preferred embodiment of the present invention. Mode for carrying out the invention

The present invention will be further described in detail below with reference to the accompanying drawings.

The main idea of the frequency allocation method of the mobile communication system of the present invention is: according to the prior art, all the services are allocated the same fixed frequency band, and a special frequency band different from the fixed frequency band is allocated for the specific service; The network side sends the downlink information to the user equipment UE and/or receives the uplink information sent by the UE, according to the service requirement, using the fixed frequency band and/or the dedicated frequency band allocated for the service.

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 a fixed frequency band to all services by using the prior art method before the system is running, and allocate a dedicated frequency band different from the fixed frequency band for the specific service specified by the operator according to the service characteristics before or after the system runs. For example, before the system is running or after the system is running, the dedicated frequency band is allocated for the broadcast/multicast service or each 3G feature service according to the broadcast/multicast service or the service characteristics of each 3G feature service. When the dedicated frequency band is allocated, the same or different dedicated frequency bands can be allocated for the uplink and downlink of the service, and the dedicated frequency band can be allocated for the downlink of the service, and the fixed frequency band is used for the uplink; or the dedicated frequency band is allocated for the uplink of the service, and the fixed frequency band is used for the downlink. The invention has at least the following two embodiments:

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 special frequency bands to perform special services, or use fixed frequency bands and dedicated frequency bands to perform the service.

The second type: Before the system is running, allocate a fixed frequency band for all services. After the system starts running, allocate special frequency bands for specific services according to service characteristics, use special frequency bands to perform special services, or use fixed frequency bands and dedicated frequency bands to perform the service.

The above two embodiments will be described in detail below with reference to preferred embodiments.

First preferred embodiment:

This embodiment is the first embodiment described above. 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 on the network side. The frequency band allocation table is as shown in the table.

As shown in Figure 1, it stores different services and their corresponding one or more frequency band numbers, and uplink or downlink traffic transmissions applied to the service.

Table 1

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

The serial number is in the frequency position of the frequency 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 a service transmission using a dedicated frequency band in a first preferred embodiment of the present invention. The process includes the following steps:

Step 101: The core network on the network side will perform some service.

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

Step 102: The core network to frequency band allocation table searches for an entry corresponding to the service.

Step 103: Determine whether the corresponding entry is found, if yes, execute step 104; otherwise, go to 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, find the frequency band information corresponding to the frequency band information in the frequency band information table, and notify the item information of the frequency band allocation table and the special frequency band information in the frequency band information table to Access Network.

Step 105: The access network performs the service by using the dedicated frequency band according to the entry information of the frequency band allocation table and the special frequency band information in the frequency band information table; or using the fixed frequency band and the dedicated frequency band to perform the service.

In this embodiment, 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. Therefore, in this step, the fixed frequency band and the dedicated frequency band are used to perform the service, that is, The network side uses the dedicated frequency band to send downlink information to the UE, and the UE uploads uplink information to the network side in the fixed frequency band. Step 106: The core network notifies the access network to perform the service, and the access network performs the service by using a fixed frequency band. That is, the network side sends downlink information to the UE and/or receives uplink information sent by the UE.

Second preferred embodiment:

This embodiment is also the first embodiment described above. In this embodiment, the network side sets the frequency band allocation table and the frequency band information table and stores them in the access network on the network side. 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 flow chart of a service transmission using a dedicated frequency band in a second preferred embodiment of the present invention. The process includes the following steps:

Step 201: The core network on the network side is to perform a certain service.

In this embodiment, it is assumed that the MBMS service is to be performed. In this embodiment, the dedicated frequency band is allocated to the MBMS service in advance, and the corresponding information is stored in the frequency band allocation table in the access network.

Step 202: The core network notifies the access network that the service is to be executed.

Step 203: The access network receives the notification, and searches the frequency band allocation table for the entry corresponding to the service.

Step 204: Determine whether the corresponding entry is found. If yes, go to step 205; otherwise, go to 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 send downlink information to the UE.

Step 205: Find, according to the dedicated frequency band corresponding to the service in the frequency band allocation table, the frequency band information table, and find the dedicated frequency band information corresponding to the frequency band number.

Step 206: The access network performs the service by using the dedicated frequency band according to the entry information of the frequency band allocation table and the dedicated frequency band information in the frequency band information table; or using the fixed frequency band and the dedicated frequency band to perform the service. In this embodiment, the dedicated frequency band allocated for the MBMS service is used only for the downlink information sent by the network to the UE. Therefore, in this step, the fixed frequency band and the dedicated frequency band are used to perform the service, that is, the dedicated frequency band used by the network side. The downlink information is sent to the UE, and the UE uploads uplink information to the network side in a fixed frequency band.

Step 207: The access network performs the service by using a fixed frequency band. That is, the network side sends downlink information to the UE and/or receives uplink information sent by the UE by using a fixed frequency band.

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

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 searches for the one or more dedicated frequency bands corresponding to the service according to the service to be allocated to the frequency band allocation table, and sends the found frequency band to the access network. The access network finds the size of the corresponding dedicated frequency band and its position in the frequency domain 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 sent by the UE. information.

Third preferred embodiment:

This embodiment is the second embodiment described above. That is, on the basis of the existing frequency allocation, after the system starts running, a new dedicated frequency band is dynamically allocated for the upcoming service, and the newly allocated dedicated frequency band is used to perform the service in cooperation with the original fixed frequency band.

In this embodiment, the fixed frequency band used by the uplink and downlink services is allocated before the system is running, and the method for allocating is the same as the prior art, and is not repeated here. The frequency band allocation table and the frequency band information table are pre-stored in the core network on the network side. The frequency band allocation table of this embodiment is shown in Table 3. It stores the service and its selectable frequency band number, and whether the dedicated frequency band is used or not.

Service Name Optional Band Whether it is used

Business A Band 1 Active

Service A band 2 is invalid

Service B band 3 is invalid Industry 'C-band 1 is valid

Service C band 3 is invalid

… … … table 3

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

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

Step 301: Determine whether the current resource condition of the core network system and/or the load condition of the cell can complete the service to be executed. If yes, step 302 is performed; otherwise, it is determined that the service to be executed needs to allocate a new dedicated frequency band to perform step 304.

In this step, the network side can determine whether the service to be executed can be completed according to the current resource usage of the system and/or the load status of the cell.

The network side collects statistics on the resources that the system currently performs, obtains the remaining resources that the system can currently provide, and predicts the resources required for the business to be executed; determines whether the remaining resources meet the business needs to be executed, and if so, determines the current system. The resource situation can complete the business to be executed; otherwise, it determines that the current resource situation of the system cannot complete the business to be executed. System resource conditions can be reflected by the transmit power of the base station and the number of spread codes used.

The network side collects statistics on the current cell load of the system. If the cell load does not exceed the predetermined threshold, it determines that the system can complete the service to be executed; otherwise, it determines that the current cell load of the system is too heavy to complete the service to be executed. The network side first determines whether the service to be executed can be completed according to the current resource usage of the system and/or the load condition of the cell, and if so, determines that the service to be executed does not need to allocate a new dedicated frequency band; otherwise, according to the characteristics of the service to be executed Determine if a new dedicated band needs to be allocated.

In step 302, it is determined whether a new dedicated frequency band needs to be allocated according to the characteristics of the service to be executed, and if yes, step 304 is performed; otherwise, it is determined that the service to be executed does not need to allocate a new dedicated frequency band, and step 303 is performed.

In this embodiment, it is determined whether the service to be executed needs to allocate a new dedicated frequency band according to the current resource condition of the system and/or the load condition and the service characteristic of the cell, and the actual application may also only pass the current system. The resource situation and/or the load condition of the cell are determined, and may be determined only based on the service characteristics.

Step 303: Perform the service with the allocated fixed frequency band before the system is running. That is, the network side uses the fixed frequency band to send downlink information to the UE and/or receive uplink information sent by the UE.

Step 304, selecting one or more unused dedicated frequency bands corresponding to the service to be performed in the frequency band allocation table, and finding the frequency band corresponding to the frequency band number and its position in the frequency spectrum in the frequency band information table, The dedicated frequency band acts as the upstream or downstream frequency band for the service to be performed.

For example, for the MBMS service, the downlink traffic is 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 the uplink traffic is large for a certain service, the newly allocated frequency band can be used as the uplink frequency band for transmitting the uplink information of the service in this embodiment. Of course, such a service is very small.

In this step, if any unused dedicated frequency band corresponding to the service is not found in the band allocation table, then return to step 303.

Step 305: Set whether the dedicated frequency band selected in the frequency band information table is used by the use identifier, that is, the dedicated frequency band is used. In step 306, the core network notifies the allocated frequency band information of the service to be sent to the access network. Step 307: The access network transmits the uplink or downlink information of the service by using the newly allocated frequency band according to the notification, and uses the fixed frequency band corresponding to the service. Transmit downlink or uplink information.

For example: For the MBMS service, the downlink information can be transmitted with the newly allocated dedicated frequency band, and the uplink information can be transmitted with the fixed frequency band.

Step 308: After the service ends, the core network sets the dedicated frequency band allocated by the service to be invalid, that is, the dedicated frequency band is unused.

Fourth Preferred Embodiment: This embodiment is the second implementation described above.

In this embodiment, a fixed frequency band has been allocated before the system is operated, and the method of allocation is the same as that in the prior art, and is not repeated here.

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

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

Step 401: The core network determines, according to the current resource condition of the system and/or the load condition of the cell, whether the service to be executed can be completed. If yes, step 402 is performed; otherwise, it is determined that the service to be executed needs to allocate a new dedicated frequency band to perform step 403.

Step 402: Perform a step 403 according to whether the characteristic of the service to be performed needs to be allocated, and if yes, perform step 403; otherwise, determine that the service to be executed does not need to allocate a new dedicated frequency band, and perform step 405.

Step 403: The core network sends the service to be performed and the information that needs to allocate a new dedicated frequency band to the access network, and notifies the access network to allocate a new dedicated frequency band for the service to be performed.

Step 404: The access network determines whether the new dedicated frequency band notification sent by the core network is received, and if yes, step 406 is performed; otherwise, step 405 is performed.

Step 405: Perform the service with the allocated fixed frequency band before the system is running. Network The network side sends downlink information to the UE and/or receives uplink information sent by the UE. Step 406: Select one or more unused dedicated frequency bands corresponding to the service to be performed in the frequency band allocation table, and find the frequency band corresponding to the frequency band number and its position in the frequency spectrum in the frequency band information table, and The dedicated frequency band acts as the upstream or downstream frequency band for the service to be performed.

In this step, if any unused dedicated frequency band corresponding to the service to be found is not found in the band allocation table, then step 405 is returned.

Step 407: Set whether the dedicated frequency band selected in the frequency band information table is set to be valid, that is, the dedicated frequency band is used.

Step 408: The access network transmits the uplink or downlink information of the service by using the newly allocated dedicated frequency band, and transmits downlink or uplink information by using the fixed frequency band corresponding to the service.

For example: For the MBMS service, the downlink information can be transmitted with the newly allocated dedicated frequency band, and the uplink information can be transmitted with the fixed frequency band allocated before the system is running.

Step 409: After the service ends, the access network sets the dedicated frequency band allocated by the service to be invalid, that is, the dedicated frequency band is unused.

In the foregoing two embodiments, the frequency band allocation table and the frequency band information table are stored in the core network or are stored in the access network. In actual applications, the frequency band allocation table may also be stored in the core network on the network side, and the frequency band information table is It is stored in the access network on the network side.

In this way, after determining that the 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 performed. The assigned dedicated frequency band to be executed is then notified to the access network. The access network finds the frequency band corresponding to the frequency band in the frequency band information table according to the received frequency band, and its location in the frequency spectrum, and uses the dedicated frequency band as the uplink or downlink frequency band to be performed. The access network uses the newly allocated dedicated frequency band to transmit the uplink or downlink information of the service; and correspondingly transmits the downlink or uplink information by using the fixed frequency band corresponding to the service. Fifth preferred embodiment:

Referring to Figure 5, Figure 5 is a block diagram showing the structure of a frequency distribution device in a fifth preferred embodiment of the present invention. The device is disposed on the network side and includes: a band allocation module 500, a service execution module 510, and an optional band selection module 520.

The frequency band allocation module 500 includes a frequency band allocating unit 501 and a frequency band information storage unit 502. The frequency band allocating unit 501 allocates the same or different dedicated frequency bands for uplink and downlink of a specific service according to service characteristics of the mobile communication system; or allocates a dedicated frequency band only for downlink of a specific service, and acts as a fixed frequency band; or only The uplink frequency allocation special frequency band of the specific service is used to store the fixed frequency band, and the allocated frequency band information is stored in the frequency band information storage unit 502, and the service execution module 510 is notified of the frequency band allocation.

The frequency band information storage unit 502 stores frequency band information including a specific service and its corresponding one or more frequency band numbers, and a frequency band corresponding to each frequency band number and its position in the frequency spectrum. In this embodiment, the band information storage unit 502 further stores an identifier of whether each frequency band allocated for each specific service is used.

The service execution module 510 determines the frequency band to be used according to the service requirement and the frequency band allocation status notification sent by the frequency band allocating unit 501, and obtains the fixed frequency band to be used and/or the dedicated frequency allocated for the service to the frequency band information storage unit 502. The frequency band information of the frequency band is transmitted to the user equipment UE by using the fixed frequency band and/or the dedicated frequency band allocated for the service, and/or receiving the uplink information sent by the UE.

In this embodiment, the service execution module 510 may further send the select available frequency band command to the frequency band selection module 520 before receiving the specific service, and receive the optional frequency band returned by the frequency band selection module 520, and obtain the optional frequency band from the frequency band information storage unit 502. Frequency band information.

The frequency band selection module 520, according to the selected available frequency band command sent by the service execution module 510, goes to the frequency band information storage unit 502 to find the frequency band allocated for the specific service and identified as unused, and returns the frequency band information of the frequency band. The business execution module 520 is provided. The mobile communication system in the above five embodiments may be: a WCDMA system; or a CDMA2000 system; or a UTRA TDD system; or a mobile communication system such as a TD-SCDMA system.

It can be seen from the above five embodiments that the frequency allocation method and apparatus of the mobile communication system of the present invention can adapt to different requirements of uplink and downlink carrier frequencies of different services, and reduce the frequency band caused by simultaneously increasing the uplink and downlink frequency bands. The band resources are wasted.

Claims

Claim

A frequency allocation method for a mobile communication system, which allocates a fixed frequency band for all services, characterized in that the method further comprises the following steps:

2. The frequency allocation method according to claim 1, wherein the method for allocating a dedicated frequency band different from the fixed frequency band for the specific service in step A is: according to the characteristics of the specific service before or after the system is started. This service allocates a dedicated frequency band that is different from the fixed frequency band.

The frequency allocation method according to claim 2, wherein the specific service is specified by the operator: a broadcast/multicast service or a 3G feature service.

The frequency allocation method according to claim 2, wherein the method for allocating a dedicated frequency band different from a fixed frequency band for a specific service according to a service characteristic before or after the system is running is:

The frequency allocation method according to claim 2 or 4, wherein the method for allocating a dedicated frequency band different from a fixed frequency band for a specific service according to service characteristics before the system is operated is:

The network side sets a frequency band allocation table and a frequency band information table; the frequency band allocation table stores a specific service and one or more corresponding frequency band numbers; the frequency band information table stores corresponding frequency band numbers. The size of the band and its position in the spectrum;

The frequency allocation method according to claim 5, wherein the frequency band allocation table and the frequency band information table are stored in a core network on the network side;

In the step B, the core network finds one or more frequency bands corresponding to the service and the size of the frequency bands and their positions in the frequency spectrum according to the service to be allocated to the frequency band allocation table and the frequency band information table, and The frequency band information is notified to the access network;

The frequency allocation method according to claim 5, wherein the frequency band allocation table and the frequency band information table are stored in an access network on the network side;

In the step B, the core network on the network side notifies the access network to perform the service; the access network finds one or more frequency bands corresponding to the service according to the service to be allocated to the frequency band allocation table and the frequency band information table. And the size of each frequency band and its position in the frequency spectrum, the downlink information is sent to the UE and/or the uplink information sent by the UE is received by using one or more frequency bands corresponding to the service.

The frequency allocation method according to claim 5, wherein the frequency band allocation table is stored in a core network on the network side, and the frequency band information table is stored in an access network on the network side; The core network on the network side searches for the one or more frequency bands corresponding to the service according to the service to be allocated to the frequency band allocation table, and sends the found frequency band to the access network;

The access network finds the size of the corresponding frequency band according to the frequency band to the frequency band information table and The location in the spectrum is used to send downlink information to the UE and/or receive uplink information sent by the UE.

The frequency allocation method according to claim 2 or 4, wherein the process of allocating a dedicated frequency band different from the fixed frequency band for the specific service according to the service characteristic after the system starts running includes:

10. The frequency allocation method according to claim 9, wherein:

If the new one or more dedicated frequency bands are allocated as the uplink and downlink frequency bands to be performed in the step A2, in the step B, the network side sends the downlink information to the UE by using the newly allocated one or more dedicated frequency bands. / or receiving uplink information sent by the UE;

If the new one or more dedicated frequency bands are allocated as the uplink frequency band to be performed in the step A2, in the step B, the network side sends the downlink information to the UE by using the fixed frequency band, and/or one or more newly allocated ones. The dedicated frequency band receives uplink information sent by the UE;

If the new one or more dedicated frequency bands are allocated as the downlink frequency band to be performed in the step A2, in the step B, the network side sends the downlink information to the UE by using the newly allocated one or more dedicated frequency bands, and/or Receiving uplink information sent by the UE from a fixed frequency band.

The frequency allocation method according to claim 9, wherein: in the step A1:

The network side first determines whether the service to be executed can be completed according to the current resource usage of the system and/or the load condition of the cell, and if so, judges according to the characteristics of the service to be executed. Whether a new dedicated frequency band needs to be allocated, otherwise it is determined that the service to be executed needs to allocate a new dedicated frequency band.

12. The frequency allocation method according to claim 9, wherein: the network side pre-stores a frequency band allocation table and a frequency band information table; the frequency band allocation table stores a service and a frequency band number that can be selected, and whether the frequency band is used. The frequency band information table stores the frequency band corresponding to each frequency band number and its position in the frequency spectrum; whether the frequency band is used for identification, and is set to be valid after the frequency band is allocated to the service; Invalid;

The frequency allocation method according to claim 12, wherein: the frequency band allocation table and the frequency band information table are stored in a core network on the network side;

The step A1 is: the core network needs to determine whether the service to be executed needs to allocate a new dedicated frequency band according to the characteristics of the service to be executed, and if yes, execute step A2; no, ij, step B uses a fixed frequency band to perform the service;

The step A2 is: 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, and finds the frequency band corresponding to the frequency band number in the frequency band information table. And its location in the spectrum, the dedicated frequency band as the uplink and / or downlink frequency band to be performed, then the step B includes:

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

The frequency allocation method according to claim 12, wherein: the frequency band allocation table and the frequency band information table are stored in an access network on the network side; The step A1 is: the core network determines whether the service to be executed needs to allocate a new dedicated frequency band according to the characteristics of the service to be executed, and if yes, performs step A2; otherwise, the fixed frequency band is used to perform the service in step B;

The step A2 includes:

A22. The access 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 performed, and finds the frequency band corresponding to the frequency band number in the frequency band information table and The location in the spectrum, the dedicated frequency band is used as the uplink and/or downlink frequency band to be performed, and the step B is: the access network sends the downlink information to the UE by using the newly allocated one or more dedicated frequency bands and/or Or receiving uplink information sent by the UE.

The frequency allocation method according to claim 12, wherein: the frequency band allocation table is stored in a core network on the network side, and the frequency band information table is stored in an access network on the network side;

The step A1 is: the core network determines whether the service to be executed needs to allocate a new dedicated frequency band according to the system condition or/and the service requirement, and if yes, performs step A2; otherwise, step B uses the fixed frequency band to perform the service;

The step A2 includes:

A22. The core network notifies the access network of the allocated dedicated frequency band to perform the service; A23. The access network finds the frequency band corresponding to the frequency band number and the spectrum in the frequency band information table according to the received dedicated frequency band. The location B, the dedicated frequency band is used as the uplink and/or downlink frequency band to be performed, and the step B is: the access network sends the downlink information to the UE and/or receives the UE by using the newly allocated one or more dedicated frequency bands. The uplink information sent. The frequency allocation method according to claim 1, wherein: the uplink information includes uplink service information and/or uplink control information; and the downlink information includes downlink service information and/or downlink control information.

A frequency distribution device for a mobile communication system, characterized in that it is disposed on a network side, and includes: a frequency band allocation module and a service execution module;

The frequency band allocation module allocates a fixed frequency band for all services, and allocates a dedicated frequency band different from the fixed frequency band for a specific service, and notifies the service execution module of the allocation; the service execution module, according to the service requirement and the frequency band allocation The notification of the module, the fixed frequency band and/or the dedicated frequency band allocated for the service, is used to send downlink information to the user equipment UE and/or receive uplink information sent by the UE.

The frequency allocation device according to claim 17, wherein the frequency band allocation module comprises a frequency band allocating unit and a frequency band information storage unit;

The frequency band allocating unit allocates the same or different dedicated frequency bands for uplink and downlink of a specific service according to the service characteristics of the mobile communication system; or allocates a dedicated frequency band only for downlink of a specific service, and acts as a fixed frequency band; or only Allocating a dedicated frequency band for the uplink of a specific service, and acting as a fixed frequency band, and storing the allocated frequency band information in the frequency band information storage unit, notifying the service execution module of the frequency band allocation;

The service execution module determines, according to the service requirement and the frequency band allocation situation sent by the frequency band allocation unit, the frequency band to be used, and the frequency band to be used by the frequency band information storage unit to obtain the frequency band to be used and/or the frequency band allocated for the service. The information is transmitted to the user equipment UE by using the fixed frequency band and/or the dedicated frequency band allocated for the service, and/or receiving the uplink information sent by the UE. 19. The frequency distribution apparatus of claim 18, wherein: the apparatus further comprises a frequency band selection module;