WO2012171406A1

WO2012171406A1 - Method and device for sending load information, method and device for terminal to access sector

Info

Publication number: WO2012171406A1
Application number: PCT/CN2012/074016
Authority: WO
Inventors: 刘滔
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-06-15
Filing date: 2012-04-13
Publication date: 2012-12-20
Also published as: CN102215548B; CN102215548A

Abstract

Disclosed are a method and a device for sending load information, a method and a device for a terminal to access a sector. The method for sending network load information comprises: a network side setting load information of a sector; and the network side selecting, according to a current network condition, whether to inform a user terminal of the load information. Through the present invention, the problem in the related art that, in contrast to the scenario before use of an NLB function, an added LoadInformation message consumes a lot of forward slot resources, can be solved.

Description

The present invention relates to the field of communications, and in particular to a method and an apparatus for transmitting network load information, and a terminal accessing a sector. Method and device. Background technique

CDMA (Code Division Multiple Access) 2000 lx EVDO (E Volution Data Optimization) technology is a branch of the CDMA2000 standard series. It is an important international standard for wireless data communication in the 3G family, EVD0. The technology is specifically designed to provide a support platform for high-speed wireless data services. The EVD0 network can be co-networked with the CDMA2000 lx network that provides voice services and low-speed data services, sharing frequency bands. The EVD0 high-speed data network is currently in a large-scale commercial period in the domestic and international communication markets, and has a bright future. Based on the EVD0 network, wireless carriers can provide users with network (Web) browsing, VOD (Video On Demand, video on demand), VT (Visual Telephony, video telephony), IP (Internet Protocol), VOIP (Voice over IP, IP-based voice transmission), video broadcasting and other multimedia services. The forward resources of wireless communication systems are invaluable and important. In the EVDO system, the forward channel structure is a time division multiplexing mode, that is, system overhead. All users' downlink signaling and data share a scheduling unit called a forward slot (slot) (1.666 ms per slot) . The increase in system overhead and downlink signaling will reduce the available forward time slots of the user's downlink data, thereby reducing the forward throughput of the carrier fan. In the EVDO augmentation system, an LB (Network Load Balancing) based on Neff (Effective User Number) information is added to balance the forward load burden between the fans. , improve the forward gain of the system. The LB function is of great value to an increasingly busy commercial network. It is equivalent to mining the idle resources of the network and improving the efficiency of resource utilization, which is a very attractive function point for operators. For a new terminal that supports the LB function, the network load balancing algorithm needs to be implemented by using a dedicated bearer message (Loadlnformation) in the overhead message sent by the AN (Access Network). The Loadlnformation message carries the current load fan and the forward load information of the neighboring area, that is, Neff. The message belongs to a kind of forward control channel overhead message, and a sector parameter message (SectorParameter) (the message describes various characteristic parameters of the system sector) needs to be sent in the synchronous control channel packet, and its format is as shown in FIG. , where the message identifier ( MessagelD , 8bit ) uniquely represents the Loadlnformation message ID to distinguish other messages; c (Loading Adjust, 5bit) indicates the forward load of the cell, the unit is 0.5dB; the number of neighbor cells (NeighborCount, 5bit) indicates the number of neighbor cells; the neighboring cell forward load (NeighborSectorLoading Adjust, 5bit) indicates the forward direction of each neighboring cell. The load, in units of 0.5 dB, is in the same order as the neighboring cell carried in the SectorParameter message. The addition of this message consumes a significant amount of forward slot resources before using the LB function. For the problem that the added Loadlnformation message in the related art consumes a large amount of forward time slot resources before using the LB function, an effective solution has not been proposed yet. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method and an apparatus for transmitting network load information, and a method and apparatus for a terminal to access a sector, so as to at least solve the problem that the added Loadlnformation message added in the related art is consumed before using the LB function. A large number of forward slot resources. According to an embodiment of the present invention, a method for transmitting network load information is provided, including: setting load information of a sector on a network side; and selecting, by the network side, whether to notify the user terminal of the load information according to a current status of the network. Preferably, the network side notifying the user terminal of the load information, the method includes: the network side notifying the user terminal of the load information by using a newly defined dedicated bearer message or an extended existing system overhead message or a broadcast message. Preferably, the network side sends the load information to the terminal by extending an existing system overhead message or a broadcast message, where: the network side sets an information unit that carries the load information in an existing system overhead message; The network side notifies the user terminal of the load information by an existing system overhead message or a broadcast message in which the information unit is set. Preferably, the existing system overhead message or broadcast message includes a forward control channel overhead message (QuickConfig). Preferably, the network side selects whether to notify the user terminal of the load information according to the current status of the network, and the method includes: determining, by the network side, whether the forward load of the carrier exceeds a preset threshold; if yes, the network side is The load information is broadcast in the QuickConfig message, and the load information is selected to notify the user terminal. Preferably, the network side broadcasts the load information in the QuickConfig message, including: adding, in the QuickConfig message, an FwdLoadInfo field indicating forward load information of the current cell; and using the FwdLoadInfo field to broadcast the load information. . Preferably, the FwdLoadInfo field has a length of 5 bits. Preferably, the FwdLoadInfo field is located at the end of the QuickConfig message. Preferably, after the network side determines whether the forward load of the carrier exceeds the preset threshold, the method further includes: if not, the network side sends a dedicated bearer message (Loadlnformation) that carries the load information. Preferably, the network side notifying the user terminal of the load information includes: if the preset threshold of the sector forward load is not the maximum value of the forward load of the carrier, and the forward load of the current cell is greater than the preset When the threshold is closed, the sending of the Loadlnformation message is closed. If the preset threshold is the maximum value of the forward load of the carrier, the Loadlnformation message is sent in the control channel, where the load information is carried in the Loadlnformation message. Preferably, the carrier fan forward load has a maximum value of 31 or 15.5 dB. Preferably, the preset threshold is a session negotiation parameter between an access terminal (AT) and an access network (AN). Preferably, the session negotiation parameter is attributed to the forward traffic channel MAC layer. According to another embodiment of the present invention, a method for a terminal to access a sector is provided, where the method includes: searching for a forward load of a current sector when a user terminal accesses a system or changes in an active set, where The forward load is selected by the network side according to the current status of the network to notify the user terminal; if the forward load of the current sector is greater than a preset threshold, the user terminal searches for other sectors until all active sets or neighbors can be received. Forward load information for the zone. According to another embodiment of the present invention, a device for transmitting network load information is provided, which is disposed on a network side, and includes: a setting module configured to set load information of a sector; and a selection module configured to select according to a current status of the network Whether to notify the user terminal of the load information. According to another embodiment of the present invention, an apparatus for a terminal to access a sector is provided, including: a search module, configured to search for a forward load of a current sector when the access system changes or an activation set is changed, where The forward load is selected by the network side according to the current situation of the network to notify the user terminal; the seeking module is set to find other sectors if the forward load of the current sector is greater than a preset threshold, until all active sets can be received or Forward load information of the neighboring area. In the embodiment of the present invention, the network side sets the load information of the sector, and further, the network side selects whether to notify the user terminal of the load information according to the current status of the network. That is, when the current status of the network meets certain conditions, Notifying the user terminal of the load information, when the current state of the network does not meet certain conditions, the load information may not be notified to the user terminal. When the forward load between the cells is uneven, for the relatively heavy load cell, the network side It may be selected not to notify the user terminal of the load information, thereby avoiding the limited pre-slot resource being preempted. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of a format of a Loadlnformation message according to the related art; FIG. 2 is a schematic flowchart of a method for transmitting network load information according to an embodiment of the present invention; FIG. 3 is a flowchart of a session negotiation according to an embodiment of the present invention. 4 is a process flow diagram of an AN transmitting an overhead message in each cell according to an embodiment of the present invention; FIG. 5 is a flowchart of processing of an AT starting cell access system according to an embodiment of the present invention; FIG. 6 is a flowchart according to the present invention. FIG. 7 is a schematic structural diagram of a method for transmitting a network load information according to an embodiment of the present invention; and FIG. 8 is a device for accessing a sector by a terminal according to an embodiment of the present invention; Schematic diagram of the structure. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. As mentioned in the related art, the added Loadlnformation message consumes a large amount of forward slot resources before using the LB function. By analyzing the characteristics of the LB function, it can be seen that the more uneven the forward load between cells, the greater the gain that can be achieved by the LB algorithm. In the scenario where the LB algorithm can obtain a large gain, there must be some cells with relatively heavy load. In order to support the LB function, broadcasting Neff information on the forward control channel obviously robs the originally forward slot resources. In order to solve the above technical problem, the embodiment of the present invention provides a method for transmitting network load information, and the processing flow thereof is as shown in FIG. 2, and includes steps S202 to S204: Step S202: The network side sets the load information of the sector. Step S204: The network side selects whether to notify the user terminal of the load information according to the current status of the network. In the embodiment of the present invention, the network side sets the load information of the sector, and further, the network side selects whether to notify the user terminal of the load information according to the current status of the network. That is, when the current status of the network meets certain conditions, the load information may be notified to the user terminal. When the current state of the network does not meet certain conditions, the load information may not be notified to the user terminal, and the forward load between the cells is uneven. In the case of a cell with a relatively heavy load, the network side may choose not to notify the user terminal of the load information, thereby preventing the limited forward slot resources from being preempted. When the network side notifies the user terminal of the load information, the load information may be notified to the user terminal by using the newly defined dedicated bearer message, or the load information may be notified to the user terminal by extending the existing system overhead message or the broadcast message. Other means can be used to notify the user terminal of the load information. When the network side sends the load information to the user terminal by extending the existing system overhead message or the broadcast message, the network side needs to set the information unit carrying the load information in the existing system overhead message, and then the network side sets the information unit that carries the load information. The existing system overhead message or broadcast message notifies the user terminal of the load information. Preferably, the existing system overhead message or broadcast message includes a forward control channel overhead message (QuickConfig). When implemented, the network load information related to the embodiment of the present invention may be Neff information, and may also be other types of load information. The Neff information is taken as an example for description. The processing procedure of the Neff information transmission method is as follows, including steps 1 to 2: Step 1: Determine whether the forward load of the carrier fan exceeds a preset threshold; Step 2: If yes, in the forward control channel In the overhead message (QuickConfig), the Neff information of the local cell is broadcasted, and the transmission of the Neff information is implemented. In the embodiment of the present invention, it is determined whether the forward load of the carrier exceeds a preset threshold. If yes, the Neff information of the local cell is broadcasted in a forward control channel overhead message (QuickConfig) to implement transmission of Neff information. That is, when the load fan forward load exceeds the preset threshold, the Neff of the current cell is broadcasted in another forward control channel overhead message (QuickConfig), and the Neff information is sent by using the Loadlnformation message in the prior art, saving The occupation of the forward slot resource by the Loadlnformation message improves the forward slot resource utilization of the user, which is beneficial to improving the forward capacity of the commercial system and improving the network value of the operator. When the existing system overhead message or the broadcast message selects the QuickConfig message to carry the load information, the network side determines whether the forward load of the carrier exceeds the preset threshold; if yes, the network side broadcasts the load information in the QuickConfig message, and selects to notify the user terminal of the load information. . In implementation, the load information (for example, Neff information) is broadcasted in the QuickConfig. Preferably, the forward overhead information field (FwdLoadInfo) indicating the forward load information of the current cell may be added in the QuickConfig, and the Neff information is broadcasted by using the added FwdLoadInfo field. . In the implementation, the length of the FwdLoadlnfo field can be lbit, which can be 10 bits or 2 bits and 3 bits. For example, the length can be set to 5 bits, which can avoid wasting a lot of resources while carrying enough Neff information. . Considering the compatibility of new and old terminals, the FwdLoadInfo field can be set at the end of QuickConfig to facilitate compatibility between new and old terminals. Of course, in the implementation, if the new and old terminals are compatible, you can also set the FwdLoadInfo field to other locations in the QuickConfig message, for example, the top, middle,

During implementation, it is determined whether the forward load of the carrier exceeds the preset threshold. There may be another result, that is, the forward load of the carrier does not exceed the preset threshold. At this time, the dedicated bearer message (Loadlnformation) for transmitting the load information is sent. , the same way as the Neff information in the related art is transmitted. Of course, in the specific implementation, the load information of the bearer includes not only the Neff information, but also other load information, and the type of the load information is determined by the specific situation. In order to make the method provided by the embodiment of the present invention clearer and clearer, and to form a clear contrast with the related art, the flow of the method for transmitting the network load information will be described in detail later by taking the Neff information as an example, if other Network load information, such as cell access data, etc., the corresponding processing flow is similar. It can be seen from the above that the sending of the Neff information is taken as an example. The embodiment of the present invention provides that the sending method of the Neff information includes two parts. The first part is when the forward load of the carrying fan does not exceed the preset threshold (ie, the forward direction of the carrying fan) When the cell with light load is used, the NGF information (including the forward load information of the neighboring cell of the local cell and the local cell) is sent by using the Loadlnformation message, and the second part is when the forward load of the carrier exceeds the preset threshold (ie, before the carrier fan) When the cell is heavily loaded, the Neff information (including only the cell information) is sent by using the QuickConfig message. In implementation, the preset threshold can be defined as the forward load threshold (FwdSectorHighLoadThresh), and FwdSectorHighLoadThresh is used to control whether the load-bearing fan sends Neff information. The parameter is designed as a GARP (Generic Attribute Update Protocol) negotiation parameter, which is unified by the entire network and synchronized by the AN to the control channel unit of the cell. Compare the current cell Neff with FwdSectorHighLoadThresh, such as If Neff is greater than the threshold, the Neff of the local cell is sent in the QuickConfig message, and the Neff information is no longer sent. In the implementation, the preset threshold is a session negotiation parameter between the access terminal AT and the access network AN. Preferably, the preset threshold is designed to enhance the forward traffic channel MAC (Media Access Control) layer. The negotiation parameter is valid if and only if the negotiation parameter (LoadlnformationSupported) is true (TRUE), where LoadlnformationSupported indicates whether the AT supports Neff information decoding. During the transmission of the load information, if the preset threshold is not the maximum value of the forward load of the carrier, and the forward load of the cell is greater than the preset threshold, the sending of the Loadlnformation message is turned off, which saves the Loadlnformation message to the forward time slot. The use of resources improves the utilization of forward time slot resources of users, which is beneficial to improving the forward capacity of commercial systems and improving the network value of operators. If the preset threshold is the maximum value of the forward load of the carrier, the control channel Send a Loadlnformation message. According to the existing protocol, the maximum forward load of the carrier fan is 31 or 15.5 dB. With the foregoing method provided by the embodiment of the present invention, the corresponding processing of the AT end is as follows: If the QuickConfig (FwdLoadInfo=0) received by the AT considers that the current cell is lightly loaded, the AT needs to continue to receive the LoadInfofoping overhead message to learn the Neff of the local cell and the local cell. Neff in the neighborhood. If the AT receives the QuickConfig (FwdLoadInfo>FwdSectorHighLoadThresh) and considers that the current cell is heavily loaded, the AN will not send the Loadlnfomation overhead message at this time. If the AT needs to obtain the Neff of other neighboring cells, it needs to lock to other load-bearing fans. After obtaining the Neff value of all the fans in the active set, the AT side executes the LB algorithm, and selects the carrier fan with the largest SINR (Signal to Interference plus Noise Ratio) and Neff ratio as the service carrier fan. In particular, if the FwdSectorHighLoadThresh parameter is set to 31 ( 15.5dB), it means that the LoadInfofomation message needs to be constructed to be sent on the control channel regardless of the forward load. After the improvement by the above method, the forward slot resource situation analysis: Consider that the sending period of the Loadlnfomation message is 512slot, and the sending period of the QuickConfig message is 256slot: 8+5+5+32 (number of neighbors) can be saved per 512slot. *5(bit) *1 (times) - 5(bit)*2 (times) = 178-10 = 168bit; Consider the case where the loadlnfomation message is sent in 512slot and the QuickConfig message is sent in 512slot: every 512slot Save 8+5+5+32 (number of neighbors) *5(bit) *1 (times) - 5(bit)*l(times) =

The above analysis shows that the above improved method reduces the overhead of the system to the forward time slot consumption and improves the utilization of the forward time slot resource of the user. The embodiment of the invention solves the problem of how to improve the utilization of the forward time slot resource in the cellular mobile communication system, and is particularly suitable for the time-division mode wireless communication system mainly based on data services, especially the EVDO enhanced system in the CDMA2000 series standard. The embodiments of the present invention have significant effects on reducing the system overhead of the EVDO enhanced system, improving the forward time slot utilization rate of the user, and increasing the system forward capacity. The method of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The algorithm involved in the embodiment of the present invention mainly involves three processes. FIG. 3 describes the negotiation process, including whether the AT supports the Neff information decoding capability discovery, the Neff threshold (that is, the forward load threshold (FwdSectorHighLoadThresh)) negotiation; and FIG. 4 describes the AN processing flow. This includes controlling whether the LoadInfofomation message is sent according to the Neff threshold. FIG. 5 depicts the AT processing flow, including the AT determining whether to search for the LoadInfofomation message and decoding according to the Neff threshold, and finally the AT performs the LB decision. In FIG. 3, when the session negotiation is started, the method is processed according to the embodiment of the present invention. The processing step includes steps S302 to S310: Step S302, starting the session establishment process; Step S304, the AT reporting Neff support capability, that is, whether the AT supports The Neff information is decoded. Step S306: The AN determines whether the AT supports the Neff information decoding according to the AT report content. If yes, step S308 is performed. If no, step S310 is performed; Step S308, updating the Neff threshold of the AT to the system recommendation threshold; Step S310 End the session creation process. In FIG. 4, the AN starts to process the method according to the embodiment of the present invention, and the processing step includes the following steps: Step S402 to Step S414: Step S402: Start a cell overhead message sending period; Step S404, AN collects And calculating the Neff of the current cell and the Neff of the neighboring cell; Step S406, the AN determines whether the Neff value of the current cell is greater than the negotiated Neff threshold, if yes, step S408 is performed, if otherwise, S410 is performed; Step S408: The current cell Neff is greater than the Neff threshold. To save the forward time slot overhead, stop sending the LoadInfo message to the current cell, and continue to step S412. Step S410: The current cell Neff is still less than or greater than the Neff threshold, and the current cell continues to send the LoadInfofomation message. And setting FwdLoadlnfo in the QuickConfig message to 0, and continuing to step S414; Step S412, after the cell stops transmitting the LoadInfofomation message, in the QuickConfig message, setting FwdLoadInfo to the Neff information of the cell; Step S414, the overhead message sending period End. In FIG. 5, when the AT supporting the Neff information decoding starts the cell access system, the method is processed according to the embodiment of the present invention, and the processing step includes the steps S502 to S516: Step S502: The AT supporting the Neff information decoding starts to be connected once. In the system process, the LB algorithm is started; Step S504, the AT receives the Neff of the current cell from the QuickConfig message and determines whether it is greater than the Neff threshold. If yes, step S506 is performed, if otherwise, step S508 is performed; Step S506, the current cell Neff is greater than Neff Threshold, the AT selects another cell from the active set, and continues to receive the Neff information of the cell from the QuickConfig message; the current cell Neff is still less than the Neff threshold, the current cell continues to send the LoadInfofomation message, and step S510 is performed; Step S508, the current cell Neff does not exceed The Neff threshold, the AT searches for the Loadlnfomation message, decodes the Neff information of the neighboring cell, and performs step S512; Step S510, determines whether the Neff of all currently active set cells of the AT is collected, if yes, step S514 is performed, if otherwise, step S504 is performed; Step S512, determining that all current active sets of the AT are small Whether the Neff of the zone is collected, if yes, step S514 is performed, if otherwise, step S506 is performed; in step S514, Neff of all active sets is collected at this time, and LB decision is made, that is, the ratio of the SINR of the cell to the cell is the largest. The cell serves as a serving cell. Step S516, the LB algorithm ends. Based on the same inventive concept, the embodiment of the present invention further provides a method for a terminal to access a sector, and the processing flow thereof is as shown in FIG. 6, and includes steps S602 to S604: Step S602, the user terminal accesses the system, or the activation set occurs. When changing, searching for the forward load of the current sector, wherein the forward load is selected by the network side according to the current status of the network to notify the user terminal; Step S604, if the forward load of the current sector is greater than a preset threshold, the user terminal searches for other Sector, until it can receive forward load information for all active sets or neighbors. Based on the same inventive concept, an embodiment of the present invention further provides a device for transmitting network load information, which is shown in FIG. 7 and is disposed on the network side, and includes: a setting module 701, configured to set load information of a sector; The selecting module 702 is configured to select whether to notify the user terminal of the load information according to the current status of the network. Based on the same inventive concept, an embodiment of the present invention further provides an apparatus for a terminal to access a sector, and a schematic structural diagram thereof is shown in FIG. 8. The method includes: a search module 801, configured to be an access system, or when an activation set changes, searching The forward load of the current sector, wherein the forward load is selected by the network side according to the current status of the network to notify the user terminal; the searching module 802 is configured to search for other sectors if the forward load of the current sector is greater than a preset threshold. Until the forward load information of all active sets or neighbors can be received. From the above description, it can be seen that the present invention achieves the following technical effects: In the embodiment of the present invention, the network side sets the load information of the sector, and further, the network side selects whether to notify the user of the load information according to the current status of the network. terminal. That is, when the current status of the network meets certain conditions, the load information may be notified to the user terminal. When the current state of the network does not meet certain conditions, the load information may not be notified to the user terminal, and the forward load between the cells is uneven. In the case of a cell with a relatively heavy load, the network side may choose not to notify the user terminal of the load information, thereby preventing the limited forward slot resources from being preempted. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. Perform the steps shown or described, or separate them into individual integrated circuit modules, or Multiple of these modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A method for transmitting network load information, including:

The network side sets the load information of the sector;

The network side selects whether to notify the user terminal of the load information according to the current status of the network.

2. The method according to claim 1, wherein the network side notifying the user terminal of the load information comprises: the network side adopting a newly defined dedicated bearer message or extending an existing system overhead message or a broadcast message. The load information informs the user terminal.

The method according to claim 2, wherein the network side notifies the user terminal of the load information by extending an existing system overhead message or a broadcast message, including:

The network side sets an information unit that carries the load information in an existing system overhead message; the network side notifies the user of the load information by using an existing system overhead message or a broadcast message of the information unit. terminal.

The method according to claim 2 or 3, wherein the existing system overhead message or broadcast message comprises a forward control channel overhead message QuickConfig message.

The method according to claim 4, wherein the network side selects whether to notify the user terminal of the load information according to the current status of the network, including:

Determining, by the network side, whether the forward load of the carrier exceeds a preset threshold;

If yes, the network side broadcasts the load information in the QuickConfig message, and selects to notify the user terminal of the load information.

The method according to claim 5, wherein the network side broadcasts the load information in the QuickConfig message, including:

Adding a forward overhead information FwdLoadInfo field indicating forward load information of the current cell to the QuickConfig message;

The load information is broadcast using the FwdLoadInfo field.

The method according to claim 6, wherein the FwdLoadInfo field has a length of 5 bits.

8. The method of claim 7, wherein the FwdLoadInfo field is located at the end of the QuickConfig message.

The method according to claim 5, wherein, after the network side determines whether the forward load of the carrier exceeds a preset threshold, the method further includes: if not, sending, by the network side, a dedicated bearer message carrying the load information Loadlnformation message.

10. The method according to claim 1, wherein the network side notifying the user terminal of the load information comprises:

If the preset threshold of the sector forward load is not the maximum value of the forward load of the carrier, and the forward load of the current cell is greater than the preset threshold, the sending of the Loadlnformation message is closed;

And sending the Loadlnformation message to the control channel, where the load information is carried in the Loadlnformation message, if the preset threshold is the maximum load of the forward load of the carrier.

11. The method of claim 10, wherein the carrier fan forward load has a maximum value of 31 or 15.5 dB.

The method according to claim 5 or 10, wherein the preset threshold is a session session negotiation parameter between the access terminal AT and the access network AN.

13. The method according to claim 12, wherein the Session negotiation parameter is attributed to a forward traffic channel medium access control MAC layer.

A method for a terminal to access a sector, the method comprising: searching for a forward load of a current sector when the user terminal accesses the system or the activation set changes, wherein the forward load is determined by the network side according to the network Whether the current status is selected to notify the user terminal;

If the forward load of the current sector is greater than a preset threshold, the user terminal looks for other sectors until it can receive forward load information for all active sets or neighbors.

A device for transmitting network load information, which is disposed on the network side, and includes:

Setting a module, set to set the load information of the sector;

The selection module is set to select whether to notify the user terminal of the load information according to the current status of the network.

16. A device for accessing a sector by a terminal, comprising: Searching module, when set to access system or when the activation set changes, searching for the forward load of the current sector, wherein the forward load is selected by the network side according to the current status of the network to notify the user terminal; the seeking module is set to if The forward load of the current sector is greater than a preset threshold, and other sectors are sought until the active load information of all active sets or neighboring cells can be received.