WO2010081326A1

WO2010081326A1 - Method, system and evolutional node b for obtaining load status of cells

Info

Publication number: WO2010081326A1
Application number: PCT/CN2009/073463
Authority: WO
Inventors: 樊伟毅
Original assignee: 中兴通讯股份有限公司
Priority date: 2008-12-30
Filing date: 2009-08-24
Publication date: 2010-07-22
Also published as: CN101772080A

Abstract

A method, system and evolutional node B for obtaining the load status of cells. The method is applied to report load status of cells between evolutional node Bs, and includes following procedures: the first evolutional node sends a resource status request message to the second evolutional node, wherein the cell list information of cells of the second evolutional node that adjoin the cells of the first evolutional node is contained; and responding to the resource status request message, the second evolutional node sends back the load status of the cells indicated in the cell list information to the first evolutional node. The invention has promoted the system efficiency and lightened the system load.

Description

The present invention relates to the field of communications, and in particular to a method and system for acquiring a cell load state, and an evolved node B.

BACKGROUND The Long Term Evolution (LTE) system includes a core network and an access network. The core network includes a mobility management entity (Mobile Management Entity, which is called ΜΜΕ) / a monthly gateway (Service). -Gateway, a device called S-GW), and the access network includes an evolved Node B (eNodeB) device. 1 is a network topology diagram of an LTE system according to the related art. As shown in FIG. 1, in a Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN), The eNodeB communicates with the neighboring eNodeB through the X2 interface (the interface between the eNodeBs is used for the information exchange between the eNodeBs), and the eNodeB is connected to the core network through the S1 interface, and the eNodeB communicates with the user through the X1 interface (ie, the air interface). Device (User Equipment, called UE) communication. Based on the eNodeB cell load balancing policy, some UEs of the high traffic load cell are handed over to other neighboring eNodeB cells. In order to reduce the probability of handover failure (ie, avoiding handover to other neighboring eNodeB cells is also a high traffic load cell), it is necessary to acquire the load status of the neighboring eNodeB cell in advance, and switch the UE to a low-load adjacency when the cell load balancing policy is switched based on the cell. Community. The current 3rd Generation Partnership Project (3rd Generation Partnership Project) refers to the process description of obtaining the neighbor cell load status through the eNodeB X2 port, and FIG. 2 is the initial process of the resource status report according to the related art. The interaction flow chart, as shown in FIG. 2, the eNodeB1 requests the eNodeB2 to start or stop the cycle 4 to report the cell load status, and the Resource Status Reporting Initiation process includes: 3⁄4. Steps S202 to S204 are as follows: Step S202: The eNodeB 1 sends a RESOURCE STATUS REQUEST message to the eNodeB2 through the X2 interface. Step S204: After receiving the RESOURCE STATUS REQUEST message, the NodeB2 starts or stops sending the cell load status period 4 according to the indication in the content of the message; if the eNodeB2 is processed correctly, the resource is returned to the eNodeB1! RESOURCE STATUS RESPONSE message, RESOURCE STATUS FAILURE message. FIG. 3 is an interaction flowchart of a resource status reporting process according to the related art. As shown in FIG. 3, the eNodeB2 periodically reports that the resource status report includes the following step S302: Step S302, the eNodeB2 periodically sends through the X2 interface. The RESOURCE STATUS UPDATE message is sent to the eNodeB 1 and carries the load status of the eNodeB2 cell therein. However, the above solution has the following disadvantages: The eNodeB2 periodically reports that the period of the cell load state is difficult to control. If the period is too short, the frequent reporting causes excessive X2 interface messages. If the period is too long, the eNodeB1 cannot obtain the eNodeB2 cell load status in real time. Happening. In view of the problem that the cell status of the periodic report in the related art may cause too many X2 interface messages or cannot obtain the cell load status in real time, an effective solution has not been proposed yet. SUMMARY OF THE INVENTION The present invention has been made in view of the problem that periodically reporting a cell status in a related art may result in an excessive X2 interface message or a real-time acquisition of a cell load state. To this end, the main object of the present invention is to provide an improved report of cell load status. The program to solve at least one of the above problems. In order to achieve the above object, according to an aspect of the present invention, a method of acquiring a cell load state is provided. The method for acquiring a cell load state according to the present invention is applied to report a 'J, zone load state between eNodeBs, and includes the following operations: a first evolved Node B (ie, eNodeB1) to a second evolved Node B (ie, eNodeB2) Transmitting a resource status request message, and carrying therein cell list information adjacent to the eNodeB1 cell in the eNodeB2; in response to the resource status request message, the eNodeB2 returns the load status of the cell indicated by the cell list information to the eNodeB1. Preferably, before the eNodeB2 returns the load status to the eNodeB1, the foregoing method further includes: The eNodeB2 obtains the load status locally. Preferably, the eNodeB2 returns the load status to the eNodeB1, including: The eNodeB2 returns a resource status response message to the eNodeB1, and carries the load status therein. Preferably, the eNodeB2 returns the load status to the eNodeB1, including: The eNodeB2 returns a resource status update message to the eNodeB1, and carries the load status therein. In order to achieve the above object, according to another aspect of the present invention, an eNodeB is also provided. An eNodeB according to the present invention includes: a receiving module, a feedback module. The above structure will be described below. The receiving module receives the resource status request message from the other eNodeB, where the resource status request message carries the cell list information of the eNodeB adjacent to the cell of the other eNodeB, and the feedback module feeds back the load status of the cell indicated by the cell list information to the other eNodeB. . Preferably, the eNodeB further includes: an obtaining module, configured to obtain a load status from the local. In order to achieve the above object, according to another aspect of the present invention, an acquisition system of a cell load state is provided. The system for acquiring the cell load status according to the present invention includes an eNodeB 1 and an eNodeB2, where the eNodeB1 includes: a sending module, configured to send a resource status request message to the eNodeB2, and carry a cell list adjacent to the eNodeB1 cell in the eNodeB2. The eNodeB2 includes: a receiving module, configured to receive a resource status request message from the eNodeB 1, and a feedback module, configured to feed back, to the eNodeB 1, the load status of the cell indicated by the area list information. Preferably, the eNodeB2 further includes: an obtaining module, configured to acquire a load status from the local. According to the present invention, the method for reporting the load status according to the resource status request message sent by the neighboring eNodeB is used to solve the problem that the periodic reporting of the cell status in the related art may cause the X2 interface message to be excessive or the cell load status cannot be obtained in real time, thereby improving the problem. The efficiency of the system and the load on the system is reduced. The drawings described herein are provided to provide a further understanding of the invention and constitute a part of this application. The illustrative embodiments of the present invention and the description thereof are intended to explain the present invention and are not intended to limit the invention. In the drawings: FIG. 1 is a network topology diagram of an LTE system according to the related art; FIG. 2 is an interaction flowchart of an initial process of reporting a resource status according to the related art; FIG. 3 is a resource status according to the related art. FIG. 4 is a flowchart of a method for acquiring a cell load state according to an embodiment of the present invention; FIG. 5 is a flowchart of a method for acquiring a cell load state according to the first embodiment of the present invention; 6 is a flowchart of a method for acquiring a cell load state according to the second embodiment of the present invention; and FIG. 7 is a structural block diagram of an acquisition system for a cell load state according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides an improved cell load state by considering the problem that the periodic reporting of the cell status in the related art may cause the X2 interface message to be excessive or the cell load state cannot be obtained in real time. In the obtaining scheme, when the neighboring eNodeB sends the resource status request message to trigger the 4 payload state, the eNodeB receiving the resource status request message feeds back the load status, which can improve the efficiency of the system and reduce the load of the system. 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. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. Method Embodiment According to an embodiment of the present invention, a method for acquiring a cell load status is provided, which is applied to report a cell load status between eNodeBs. When the eNodeB 1 cell has a high traffic load, the eNodeB 1 needs to switch to the bearer cell of the neighboring eNodeB 2 according to the load balancing policy. In this case, the current load state information of the eNodeB 2 cell needs to be acquired. FIG. 4 is a flowchart of a method for acquiring a cell load state according to an embodiment of the present invention. As shown in FIG. 4, the method includes the following steps S402 to S404: Step S402, the eNodeB1 sends a RESOURCE STATUS REQUEST message to the eNodeB2, and carries the cell list information in the eNodeB2 adjacent to the cell of the eNodeB 1. Step S404, in response to the resource status request message, the eNodeB2 returns the load status of the cell indicated by the cell list information to the eNodeB1. Prior to this, the eNodeB2 obtained the load status locally. In step S404, the load status of the cell indicated by the eNodeB2 returning the cell list information to the eNodeB1 may be implemented in the following two forms:

(1) The eNodeB 2 returns a resource status response message to the eNodeB1 and carries the load status therein. Specifically, the current load status of the eNodeB2 cell is returned to the eNodeB1 in the response message, or directly returns the eNodeB2 cell load status using the RESOURCE STATUS RESPONSE message.

(2) The eNodeB 2 returns a resource status update message to the eNodeB1 and carries the load status therein. Specifically, after the eNodeB2 returns a RESOURCE STATUS RESPONSE message to the eNodeB1, the eNodeB2 cell load is returned in the transmitted RESOURCE STATUS UPDATE message. After the step S404, the eNodeB1 obtains the cell load status of the eNodeB2. If the eNodeB2 cell load status is not high, that is, the load balancing policy-based handover is performed, some UE services are switched to the eNodeB2 cell; if the eNodeB2 cell load is also high Then, the operations of step S402 and step S404 described above are repeated to obtain the cell load status of other eNodeBs. With this embodiment, the eNodeB1 requests the cell load status when performing load balancing, and the eNodeB2 directly reports the cell load status in the response message. By using the direct query method, the eNodeB1 obtains the eNodeB2 cell load status in real time, and also avoids There are too many X2 port messages caused by the eNodeB2 periodically reporting the cell load status. The implementation process of the embodiment of the present invention will be described in detail below with reference to examples. The two eNodeBs in the LTE system establish a connection through the X2 port. The two eNodeBs are the eNodeB1 and the eNodeB2, respectively. The cell (Cell) 1, the Cell2, and the CelB are the three cells belonging to the eNodeB2, where Celll and Cell2 are adjacent cells of the eNodeB1 cell. . Example one FIG. 5 is a flowchart of a method for acquiring a cell load state according to the first embodiment of the present invention. As shown in FIG. 5, the method includes the following steps S502 to S504: Step S502, the eNodeB1 sends a resource status request to the eNodeB2 (RESOURCE) STATUS REQUEST) message, where the RESOURCE STATUS REQUEST message includes neighboring cells Celll and Cell2 of the eNodeB1 cell. Step S504, the eNodeB2 returns the current load status of the Celll and Cell2 to the eNodeB1 using a RESOURCE STATUS RESPONSE message. The message body cell in the first instance is described in the following Table 1 and Table 2: Table 1 resource status request message

Table 2 Resource Status Response Message

Through this example, a technical solution for the eNodeB 2 to feed back the cell load status in the resource status response message in response to the resource status request message is provided. Example 2 FIG. 6 is a flowchart of a method for acquiring a cell load state according to the second embodiment of the present invention. As shown in FIG. 6, the method includes the following steps S602 to S606: Step S602, the eNodeB1 sends a RESOURCE STATUS REQUEST message to the eNodeB2, where the RESOURCE STATUS REQUEST message includes the neighboring cells Celll and Cell2 of the eNodeB1 cell. Step S604, the eNodeB2 returns a RESOURCE STATUS RESPONSE message to the eNodeB1. Step S606, the eNodeB2 returns the current load status of the Celll and Cell2 to the eNodeB1 using a RESOURCE STATUS UPDATE message. Through this example, a technical solution for the eNodeB 2 to feed back the cell load status in the resource status update message in response to the resource status request message is provided. System Embodiments According to an embodiment of the present invention, an acquisition system for a cell load status is provided. FIG. 7 is a structural block diagram of a system for acquiring a cell load state according to an embodiment of the present invention. As shown in FIG. 7, the system includes an eNodeB 1 2 and an eNodeB 2 4 , and the structure thereof will be described below. The eNodeB1 2 includes: a sending module 22, configured to send a resource status request message to the eNodeB2, and carry the cell list information in the eNodeB2 adjacent to the cell of the eNodeB1. The eNodeB2 4 is connected to the eNodeB1, and includes: a receiving module 42, configured to receive a resource status request message from the eNodeB1, and a feedback module 44, connected to the receiving module 42, after the receiving module 42 receives the resource status request message, The eNodeB1 feeds back the load status of the cell indicated by the cell list information. Further, the eNodeB2 4 further includes: an obtaining module (not shown), connected to the receiving module 42 and the feedback module 44, configured to obtain the load status from the local after the receiving module 42 receives the resource status request message, so as to provide feedback. The module 44 feeds back to the eNodeB1 the load status of the cell indicated by the cell list information. It should be noted that the eNodeB1 and the eNodeB2 in the above system may be used in combination as a system structure, or may be used as an independent device. With the above-mentioned embodiment of the present invention, when the eNodeB1 is in load balancing, the cell load state is requested, and the eNodeB2 directly reports the cell load status in the response message. By using the direct query method, the eNodeB1 obtains the eNodeB2 cell load status in real time. Also avoided eNodeB2 The X2 port message caused by the periodic reporting of the cell load status increases the efficiency of the system and reduces the load on the system. 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, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into 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 scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for obtaining a cell load state, which is applied to an evolved Node B, and wherein the method includes:

The first evolved Node B sends a resource status request message to the second evolved Node B, and carries therein the cell list information of the second evolved Node B adjacent to the cell of the first evolved Node B;

In response to the resource status request message, the second evolved Node B returns the load status of the cell indicated by the cell list information to the first evolved Node B.

The method according to claim 1, wherein before the second evolved node B returns the load status to the first evolved node B, the method further includes:

The second evolved Node B acquires the load status locally.

3. The method according to claim 1, wherein the returning the load status by the second evolved Node B to the first evolved Node B comprises:

The second evolved Node B returns a resource status response message to the first evolved Node B and carries the load status therein.

The method according to claim 1, wherein the returning the load status by the second evolved Node B to the first evolved Node B comprises:

The second evolved Node B returns a resource status update message to the first evolved Node B and carries the load status therein.

5. An evolved node B, characterized in that it comprises:

And a sending module, configured to send a resource status request message to the other evolved Node B, and carry the 'J, area list information of the other evolved Node B adjacent to the cell of the evolved Node B.

6. An evolved Node B, comprising:

a receiving module, receiving a resource status request message from another evolved Node B, where the resource status request message carries cell list information adjacent to a cell of the other evolved Node B in the evolved Node B; And a feedback module, and feeding back, to the other evolved Node B, a load status of the cell indicated by the cell list information.

7. The evolved Node B according to claim 6, further comprising:

The ear is used to obtain the load status from the local.

8. A system for acquiring a cell load state, comprising a first evolved Node B and a second evolved Node B, wherein:

The first evolved Node B includes:

a sending module, configured to send a resource status request message to the second evolved Node B, and carry the cell list information in the second evolved Node B that is adjacent to the cell of the first evolved Node B;

The second evolved Node B includes: a receiving module, configured to receive the resource status request message from the first evolved Node B;

And a feedback module, configured to feed back, to the first evolved Node B, a load status of the cell indicated by the cell list information.

The system according to claim 8, wherein the second evolved node B further comprises:

The ear is used to obtain the load status from the local.