CN101242565A - Uplink Macrodiversity Method for Mobile Communication System - Google Patents

Abstract

The present invention relates to an uplink macro-diversity method of a mobile communication system. During the soft handover process, the steps include: when a radio network controller or a base station receives a measurement report, unpack the measurement report to obtain links of each data link Quality: analyze the unpacked measurement report, if the link quality of the first radio network controller or the first base station used to perform the uplink macrodiversity operation is the highest, directly upload the data received from the data link where it is located to the core network equipment. In the present invention, the measurement report is unpacked to determine which data link has the best link quality, and the data link with the best link quality is directly sent to the radio network controller or base station for uplink macrodiversity. The data is uploaded to the core network equipment. In this process, the data with poor quality or the signaling for notification is not transmitted between the wireless network controllers or between the base stations, thereby reducing the network traffic of uplink macro-diversity during soft handover and reducing the network load.

Description

Uplink Macrodiversity Method for Mobile Communication System

technical field

The present invention relates to an uplink macrodiversity method of a mobile communication system, in particular to a method for performing uplink macrodiversity combination on signals of multiple base stations when user equipment performs soft handover across cells in the mobile communication system.

Background technique

In a mobile communication system, when a mobile terminal crosses a cell, it usually needs to switch the signal connection between the original cell and the new cell. Taking the Universal Mobile Telecommunications System (UMTS for short) as an example, when the user equipment (User Equipment, In order to ensure the quality of the wireless link, it is necessary to maintain a continuous signal connection when performing handover. That is to say, the UE needs to establish a connection with the new cell before disconnecting the old cell, so that it can Keep the signal connection at all times, this switching method is called soft switching. During the soft handover process, the UE communicates with at least two base stations (Node B) participating in the handover. In order to improve the signal quality of the UE during the handover and keep the data from being lost during the handover process, the UE communicates with the Universal Mobile System Ground Wireless The access network (UMTS Terrestrial Radio Access Network, referred to as UTRAN) performs diversity combination of signals from multiple base stations, and this diversity combination technology is called macro diversity. For a network where the handover area accounts for a large proportion of the entire network, for example, the handover area of WCDMA accounts for 30% to 40% of the entire network, how to perform uplink macro-diversity is very important to the network.

The prior art provides a technical solution for uplink macro-diversity based on the traditional UMTS architecture, as shown in FIG. 1 , which is a schematic diagram of an application structure of uplink macro-diversity in the prior art. In this application scenario, Node B2 and Node B3 participating in UE1 handover belong to the same Radio Network Controller 4 (Radio Network Controller, RNC for short), and this RNC4 receives data from two NodeBs, Or select a link with good quality from the signal links of the two Node Bs according to the measurement report sent by a specific event, and transmit the signal of the link upward to the core network device 5 (such as GGSN/SGSN).

As shown in Figure 2, it is a schematic diagram of another application structure of uplink macro diversity in the prior art. In this application scenario, Node B2 and Node B3 participating in UE1 handover belong to different RNCs, and Node B2 belongs to RNC4 , Node B3 belongs to 6. Among the relevant RNCs receiving UE1 data, only one RNC can perform macro-diversity combination of data and upload it to core network device 5. This RNC is defined as the first RNC and is connected to the first RNC. The Node B is defined as the first Node B. The RNC that does not perform macro-diversity combination is defined as the second RNC, and the Node B connected to the second RNC is defined as the second Node B. In Figure 2, RNC4 is the first RNC, and RNC6 is the second RNC. RNC6 receives data from Node B3 and forwards it to RNC4, and then RNC4 unlocks the measurement report sent by UE1 to determine which link has the best signal. Select the link with the best signal to upload the data to the core network device 5 . In the prior art, only the first RNC performs an unpacking operation on the measurement report, and other second RNCs simply receive the measurement report without analyzing the measurement report. The measurement report is sent by the UE to each RNC according to a predetermined period or an event triggered by the user. The measurement report includes link quality parameters of the data link associated with the UE, such as bit error rate and signal-to-noise ratio. This technology has certain defects, mainly reflected in the fact that each second RNC must forward the data received from the UE to the first RNC, which greatly increases the traffic between the first RNC and the second RNC, and the network Very heavy load.

Contents of the invention

The purpose of the present invention is to propose an uplink macro-diversity method of a mobile communication system, which can reduce the network traffic of uplink macro-diversity during soft handover and reduce network load.

In order to achieve the above object, the present invention provides a method for uplink macro-diversity of a mobile communication system, in the soft handover process, comprising the following steps:

When several radio network controllers in each data link for the user equipment to access the core network receive the measurement report sent by the user equipment, they all unpack the measurement report to obtain the user equipment access to the core network The link quality of each data link;

The plurality of radio network controllers analyze the unpacked measurement report, if the link quality of the data link where the first radio network controller used to perform the uplink macrodiversity operation is within the is the highest, the first radio network controller directly uploads the data received from the data link where it is located to the core network device.

In the above technical solution, if the link quality of the data link where the first radio network controller for performing uplink macrodiversity operation is located is not the highest among the various data links, the data link with the highest link quality The second radio network controller in the road forwards the data received from the data link to the first radio network controller, and then the first radio network controller forwards the data to the second radio network controller The data is uploaded to the core network device.

In order to achieve the above object, the present invention also provides another uplink macro-diversity method of a mobile communication system, which includes the following steps in the soft handover process:

When several radio network controllers in each data link for the user equipment to access the core network receive the measurement report sent by the user equipment, they all unpack the measurement report to obtain the user equipment access to the core network The link quality of each data link;

The plurality of radio network controllers analyze the unpacked measurement report, and the link quality of the data link where the first radio network controller is used to perform the uplink macrodiversity operation is among the data links If it is not the highest, the second radio network controller in the data link with the highest link quality forwards the data received from the data link to the first radio network controller, and then the first radio network controls The device uploads the data forwarded by the second radio network controller to the core network device.

In the above technical solution, if the link quality of the data link where the first radio network controller is used to perform the uplink macrodiversity operation is the highest among the data links, the first radio network control The device directly uploads the data received from the data link where it is located to the core network device.

For a flat network architecture, that is, there is no RNC, and the network architecture in which some functions of the RNC are distributed to each Node B, in order to achieve the above object, the present invention provides an uplink macro-diversity method for a mobile communication system, in the soft handover process , including the following steps:

When the base stations corresponding to the several data links for the user equipment to access the core network receive the measurement report sent by the user equipment, they all unpack the measurement report, and obtain the several data links for the user equipment to access the core network link quality;

The several base stations analyze the unpacked measurement reports, and if the link quality of the data link where the first base station used to perform the uplink macrodiversity operation is the highest among the various data links, the The first base station directly uploads the data received from the data link where it is located to the core network device.

In the above technical solution, if the link quality of the data link where the first base station for performing uplink macrodiversity operation is located is not the highest among the various data links, then the link quality of the data link with the highest link quality The second base station forwards the data received from the data link to the first base station, and then the first base station uploads the data forwarded by the second base station to the core network device.

In order to achieve the above object, the present invention also provides another uplink macro-diversity method of a mobile communication system, which includes the following steps in the soft handover process:

When the base stations corresponding to the several data links for the user equipment to access the core network receive the measurement report sent by the user equipment, they all unpack the measurement report, and obtain the several data links for the user equipment to access the core network link quality;

The several base stations analyze the unpacked measurement reports, and if the link quality of the data link where the first base station for performing uplink macrodiversity operation is located is not the highest among the various data links, the chain The second base station in the data link with the highest road quality forwards the data received from the data link to the first base station, and then the first base station uploads the data forwarded by the second base station to the core network equipment.

In the above technical solution, if the link quality of the data link where the first base station for performing uplink macrodiversity operation is located is the highest among the various data links, the The data received by the data link is uploaded to the core network device.

Based on the above technical solution, the present invention has the following advantages: In the present invention, both the radio network controller or the base station related to the user equipment unpack the measurement report to determine which data link has the best link quality, and directly The data link with the best link quality uploads data to the core network equipment through the radio network controller or base station for uplink macro-diversity. In this process, the data with not the best quality is not transmitted between the radio network controller or base station and notification signaling, thereby reducing the network traffic of uplink macro-diversity during soft handover, and reducing the network load.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a schematic diagram of an application structure of uplink macro diversity in the prior art.

Fig. 2 is a schematic diagram of another application structure of uplink macro diversity in the prior art.

FIG. 3 is a schematic diagram of an application structure in which the uplink macro diversity method of the present invention is applied to a traditional communication network architecture.

FIG. 4 is a schematic diagram of another application structure in which the uplink macro diversity method of the present invention is applied to a traditional communication network architecture.

Fig. 5 is a schematic flowchart of an embodiment of the method for uplink macro diversity according to the present invention.

FIG. 6 is a schematic diagram of an application structure in which the uplink macro-diversity method of the present invention is applied to a flat communication network architecture.

FIG. 7 is a schematic diagram of another application structure in which the uplink macro diversity method of the present invention is applied to a flat communication network architecture.

Fig. 8 is a schematic flowchart of another embodiment of the method for uplink macro diversity according to the present invention.

Detailed ways

The concept of the present invention is: since the UE sends measurement reports to each RNC in a predetermined period or according to user events, and for each RNC, it can be known which data link in each RNC has the best quality according to the measurement report, so Each RNC unpacks the measurement report, and then uploads the data with the best link quality to the core network according to the measurement report. Compared with the prior art, only the first RNC unpacks the measurement report, and other second RNCs are required to forward the data to the first RNC, which reduces the data transmission amount of uplink macro-diversity during soft handover, and also reduces the network load.

3-5 are embodiments of the uplink macro-diversity method of this mobile communication system applied to the traditional mobile communication network architecture, wherein FIG. 5 is a schematic flow chart of an embodiment of the uplink macro-diversity method of the present invention. During the soft handover process, Include the following steps:

Step 101, when several radio network controllers in each data link of the user equipment accessing the core network receive the measurement report sent by the user equipment, they all unpack the measurement report, and obtain the user equipment access The link quality of each data link entering the core network;

Step 102, the plurality of radio network controllers analyze the unpacked measurement reports, and determine that the link quality of the data link where the first radio network controller is used to perform uplink macrodiversity operation is in the Whether it is the highest in the data link, if yes, execute step 103, otherwise execute step 104;

Step 103, the first radio network controller directly uploads the data received from the data link where it is located to the core network device, and then ends the operation;

Step 104, the second radio network controller in the data link with the highest link quality forwards the data received from the data link to the first radio network controller, and then the first radio network controller Uploading the data forwarded by the second radio network controller to the core network device.

In step 103 of this embodiment, when the link quality of the data link where the first radio network controller 4 for performing uplink macrodiversity operation is located is the highest among all data links, as shown in FIG. 3 , The radio network controller 4 directly uploads the data received from the data link where it is located to the core network device 5 . And when the link quality of the data link where the first radio network controller 4 is located is not the highest, the process shown in FIG. 4 can be adopted, that is, the second radio network controller 7 in the data link with the highest link quality The data received from the data link is forwarded to the first radio network controller 4 , and then the first radio network controller 4 uploads the data forwarded by the second radio network controller 7 to the core network device 5 .

In this embodiment, the process in the prior art may also be adopted when the link quality of the data link where the first radio network controller 4 is located is not the highest, that is, in the radio network controller associated with the user equipment, Except the first radio network controller 4 for performing the uplink macrodiversity operation, other radio network controllers transmit the received data to the first radio network controller 4, and then the first radio network controller 4 transmits the received data The data is combined by macro-diversity, and then uploaded to the core network device 5 . Similarly, when step 104 is adopted, step 103 can also be replaced by a process in the prior art.

In a flat network architecture, part of the functions of the radio network controller are distributed to the base station. Based on this network architecture, the present invention provides another embodiment for description, as shown in Figure 6-8. During the soft handover process, it includes The following steps:

Step 201, when the base stations corresponding to the several data links for the user equipment to access the core network receive the measurement reports sent by the user equipment, they all unpack the measurement reports, and obtain the several data links for the user equipment to access the core network link quality of the data link;

Step 202, several base stations analyze the unpacked measurement report, and judge whether the link quality of the data link where the first base station for performing uplink macrodiversity operation is located is the highest among all data links, if so Execute step 203, otherwise execute step 204;

Step 203, the first base station directly uploads the data received from the data link where it is located to the core network device, and ends the operation;

Step 204, the second base station in the data link with the highest link quality forwards the data received from the data link to the first base station, and then the first base station forwards the data forwarded by the second base station Upload to the core network device.

In step 203 of this embodiment, when the link quality of the data link where the first base station 8 for performing uplink macrodiversity operation is located is the highest among all data links, as shown in FIG. 6, the first The base station 8 directly uploads the data received from the data link where it is located to the core network device 5 . And when the link quality of the data link where the first base station 8 is located is not the highest, the flow process shown in Figure 7 can be adopted, that is, the second base station 9 in the data link with the highest link quality will send data from the data link where it is located. The data received by the road is forwarded to the first base station 8, and then the first base station 8 uploads the data forwarded by the second base station 9 to the core network device 5.

In this embodiment, the process in the prior art can also be used when the link quality of the data link where the first base station 8 is located is not the highest, that is, in the base station associated with the user equipment, in addition to performing uplink macro The first base station 8 in diversity operation, other base stations transmit the received data to the first base station 8, and then the first base station 8 performs macro-diversity combination on the received data, and then uploads to the core network equipment 5. Similarly, when step 204 is adopted, step 203 can also be replaced by a process in the prior art.

Since the present invention can directly upload the received data to the core network when the link quality of the first radio network controller or the first base station for performing the uplink macrodiversity operation is the best, so no data and information are added to the network. command load. And when the link quality of the first radio network controller or the first base station is not the best, only the second radio network controller or the second base station with the best link quality sends the data to the first radio network controller or Compared with the prior art, the first base station reduces the data transmission between radio network controllers or between base stations, and also increases the system capacity.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications to the specific implementation of the invention or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, should be included in the scope of the technical solution claimed in the present invention.

Claims (8)

1. A kind of uplink macro-diversity method of mobile communication system is characterized in that, in soft handover process, comprises the following steps: When several radio network controllers in each data link for the user equipment to access the core network receive the measurement report sent by the user equipment, they all unpack the measurement report to obtain the user equipment access to the core network The link quality of each data link; The plurality of radio network controllers analyze the unpacked measurement report, if the link quality of the data link where the first radio network controller used to perform the uplink macrodiversity operation is within the is the highest, the first radio network controller directly uploads the data received from the data link where it is located to the core network device. 2. The uplink macrodiversity method of the mobile communication system according to claim 1, wherein if the link quality of the data link where the first radio network controller is used to perform uplink macrodiversity operation is within the range of each is not the highest among the data links, then the second radio network controller in the data link with the highest link quality forwards the data received from the data link to the first radio network controller, and then the The first radio network controller uploads the data forwarded by the second radio network controller to the core network device. 3. an uplink macro-diversity method of a mobile communication system, characterized in that, in the soft handover process, comprising the following steps: When several radio network controllers in each data link for the user equipment to access the core network receive the measurement report sent by the user equipment, they all unpack the measurement report to obtain the user equipment access to the core network The link quality of each data link; The plurality of radio network controllers analyze the unpacked measurement report, and the link quality of the data link where the first radio network controller is used to perform the uplink macrodiversity operation is among the data links If it is not the highest, the second radio network controller in the data link with the highest link quality forwards the data received from the data link to the first radio network controller, and then the first radio network controls The device uploads the data forwarded by the second radio network controller to the core network device. 4. The uplink macro-diversity method of the mobile communication system according to claim 3, wherein if the link quality of the data link where the first radio network controller is used to perform the uplink macro-diversity operation is within the range of each highest among the data links, the first radio network controller directly uploads the data received from the data link where it is located to the core network device. 5. an uplink macro-diversity method of a mobile communication system, characterized in that, in the soft handover process, comprising the following steps: When the base stations corresponding to the several data links for the user equipment to access the core network receive the measurement report sent by the user equipment, they all unpack the measurement report, and obtain the several data links for the user equipment to access the core network link quality; The several base stations analyze the unpacked measurement reports, and if the link quality of the data link where the first base station used to perform the uplink macrodiversity operation is the highest among the various data links, the The first base station directly uploads the data received from the data link where it is located to the core network device. 6. The uplink macrodiversity method of mobile communication system according to claim 5, is characterized in that, if the link quality of the data link where the first base station for performing uplink macrodiversity operation is located is within the range of each data link If the path is not the highest, the second base station in the data link with the highest link quality will forward the data received from the data link to the first base station, and then the first base station will forward the data received by the second base station to the first base station. The forwarded data is uploaded to the core network device. 7. An uplink macro-diversity method of a mobile communication system, characterized in that, in the soft handover process, comprising the following steps: When the base stations corresponding to the several data links for the user equipment to access the core network receive the measurement report sent by the user equipment, they all unpack the measurement report, and obtain the several data links for the user equipment to access the core network link quality; The several base stations analyze the unpacked measurement reports, and if the link quality of the data link where the first base station for performing uplink macrodiversity operation is located is not the highest among the various data links, the chain The second base station in the data link with the highest road quality forwards the data received from the data link to the first base station, and then the first base station uploads the data forwarded by the second base station to the core network equipment. 8. The uplink macrodiversity method of mobile communication system according to claim 7, is characterized in that, if the link quality of the data link where the first base station for performing uplink macrodiversity operation is located is within the range of each data link If it is the highest in the path, the first base station directly uploads the data received from the data link where it is located to the core network device.

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