CN105430693B - Multi-user's switching method based on service feature in a kind of 5G network - Google Patents

Abstract

The present invention relates to a multi-user switching method based on service characteristics in a 5G network. In the method, the initial user equipment broadcasts its own switching message and service characteristic type, and the surrounding user equipment obtains the message and identifies the DPI (depth) in the entity through its own service characteristics. Packet detection) unit obtains its own service feature type, if the service feature is the same as the original user equipment use feature type, it sends a handover join request, and after the current access route and (or) target cell access route are confirmed, join the handover of the initial user equipment in process. This method combines the development requirements of "guaranteeing communication service continuity" in 5G, on the premise that the current access route and (or) target cell access route can adopt the same processing method for the same service characteristics (such as allocating the same bandwidth, etc.) In this case, an improved method is provided for frequent switching of small cell users, which reduces the generation of control signaling and improves user QOS.

Description

A multi-user handover method based on service characteristics in 5G network

technical field

The invention belongs to the technical field of mobile broadband wireless communication, and relates to a multi-user switching method based on service characteristics in a 5G network.

Background technique

With the development of 4G networks, people increasingly feel that traditional communication methods cannot meet people's current exponentially growing business needs. The next generation of wireless mobile communication will develop into the integration of multiple wireless access technologies, such as WLAN, WiMAX and 5G cellular networks, etc., which will make its topology gradually evolve into a heterogeneous and overlapping three-dimensional network structure, that is, heterogeneous structure network. The same place can be covered by multiple networks at the same time, and different networks can provide different performance. On the other hand, with the rise of small cell networks (such as Micro, Pico, and Femto), it is easier for users to switch from one cell to another during the communication process. Therefore, it is necessary to ensure the continuity of user communication services and provide good user experience.

How to provide users with seamless services and reduce overhead in heterogeneous small cell networks has always been an extremely important issue in wireless mobile communications. Due to differences among heterogeneous small cells, various services, different needs of users, and different influences of the environment, user handover in this heterogeneous network is much more complicated than handover in the same network. With the increase in the number of mobile users, such complex handover problems need to be solved more urgently.

The existing handover scheme focuses on a single user, provides a handover preparation mechanism for the handover problem of a single user, and utilizes inter-cell cooperation to provide services for users together, which reduces handover delay and signaling overhead compared with traditional handover schemes .

However, the above solution does not solve the problem of multiple users switching together. If multiple users in a small cell need to move from the current cell to the next same cell at the same time, according to the previous scheme, PAR and NAR will repeatedly process the handover request of each UE, which will generate a large amount of exchange information and increase the number of handovers , resulting in a waste of bandwidth. When switching multiple users based on the same service feature type, PAR/NAR can adopt the same processing method for the same service (such as allocating the same bandwidth, etc.), which can reduce the generation of control signaling and improve user QOS.

In addition, there is currently no handover method for multiple users in future 5G heterogeneous small cells, so the inventor proposes a forward-looking multi-user based on service characteristics in 5G networks based on the development and evolution of mobile broadband wireless communication technology Switch method.

Contents of the invention

In view of this, the purpose of the present invention is to provide a multi-user handover method based on service characteristics in a 5G network, which can provide users with seamlessly connected ubiquitous information communication services and reduce the total number of handovers and signaling overhead.

To achieve the above object, the present invention provides the following technical solutions:

A multi-user handover method based on service characteristics in a 5G network, in which a group of user equipments (UEs) can be handed over from the same cell network to another same cell network at the same time under the same service characteristics, specifically including the following step:

1) The initial user equipment (UE) sends a handover request to the current access router (PAR), and the PAR will return an instruction to make the initial UE prepare for handover, and then the initial UE broadcasts its own handover preparation message and is using business feature type;

2) If adjacent UEs in the same cell have a handover intention after receiving the message, they will identify their current service feature type and compare it with the service feature type used by the initial UE. If they are of the same type, they will send handover join information to the initial UE and Make preparations for handover, and if they are different, give up performing handover together. If there is no handover intention, directly ignore the handover information of the initial UE;

3) The initial UE receives the joining information sent by the adjacent UEs, classifies them into a group, and then sends switching information such as the number of group members to the PAR;

4) PAR sends a handover command to the access router (new access router, NAR) of the surrounding available cell network. After NAR determines its own network status, it returns to PAR the optional priority of the weight of the target cell;

5) After the initial UE is confirmed by the PAR handover, the team members perform handover to the target cell together.

Further, in this method, all UEs are multi-mode mobile user equipments capable of working in different networks, including receiving handover information and service feature types, sending joining handover requests, and service feature identification entities.

Further, the network status described in the method includes signal condition (RSRP/RSRQ), load condition and service QOS performance (comprising bandwidth, time delay, jitter, packet loss rate, etc.) guarantee; the described service feature type includes: session classes, streaming classes, interactive classes, and background classes.

Further, the switching intention described in the method includes: the RSRP/RSRQ of the target cell is higher than the RSRP/RSRQ of the current cell; the load of the target cell is light; the target cell can provide higher QOS performance for the current service characteristics.

Further, the execution handover described above can be determined by a variety of network selection methods. The present invention uses the fuzzy analytic hierarchy process to calculate the weight value of the target cell, which can efficiently deal with the uncertainty of each parameter in the heterogeneous small cell network, and obtain a more reasonable The priority of the cell can be selected; using the obtained network status parameters, the parameter weights are dynamically adjusted to generate an intelligent handover strategy.

Further, the PAR or NAR described in this method includes: regularly monitoring the state of its own network; storing the signal situation obtained by monitoring, the network load situation, and the service QOS performance index that can be provided into the designated list, as the fuzzy analytic hierarchy process Input; periodically update the parameters in the existing list, and the update period is selected as 1 hour.

Further, the business feature identification entity includes the following modules: a trigger module, a judgment module, and an execution module;

The function of the triggering module is mainly, according to the received initial UE handover preparation information, triggering and identifying the type of service feature being used by itself, and sending it to the judging module as a basis for judging;

The judging module realizes comparing its own service type with the service characteristic type sent by the initial UE broadcast, and obtains a result;

The execution module will determine whether the UE needs to join the handover preparation process of the initial UE according to the judgment result.

Further, the triggering module identifies its own service feature type on the basis of its own DPI unit.

Further, the DPI unit obtains the user URL according to the current transmission service record, and judges the service feature category to which the user URL belongs.

Further, this method also includes: when a group of n UEs are successfully handed over to a certain target cell, the weight of the selected target cell is decreased by n*w%, and the weight of the previously located cell is increased by n*w%; when a cell network If the cumulative weight is lower than a certain lower threshold (that is, the load is large at this time) or the current cell network can only support one UE but cannot support multiple UEs to complete the handover, the cell will not become a candidate cell for UEs until the cell When the service transmission of some UEs in the network is completed or has been handed over to other cells, they will participate in the candidate of the target cell again.

The beneficial effect of the present invention is that: the multi-user handover method based on the service feature of the present invention solves the problem of switching together multiple users using the same service feature type under the condition that PAR/NAR can simultaneously process the same service feature type, Improved switching efficiency.

Description of drawings

In order to make the purpose, technical scheme and beneficial effect of the present invention clearer, the present invention provides the following drawings for illustration:

Fig. 1 is a schematic diagram of a 5G wireless network scene in the present invention;

Fig. 2 is a schematic flow sheet of the method of the present invention;

Fig. 3 is a block diagram of an exemplary structure of a service feature identification entity in the present invention.

Detailed ways

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

FIG. 1 is a schematic diagram of a 5G wireless network scenario in the present invention. In the coexistence of heterogeneous small cell networks, user equipment movement will cause frequent switching.

To solve this problem, the present invention provides a multi-user handover method based on service characteristics in a 5G network, the process of which is shown in FIG. 2 . In this method, a multi-user handover method based on service characteristics is described, a group of user equipments (UEs) can be handed over from the same cell network to another same cell network at the same time under the same service characteristics.

This method specifically comprises the following steps:

1) The initial user equipment (UE) sends a handover request to the current access router (PAR), and the PAR will return an instruction to make the initial UE prepare for handover, and then the initial UE broadcasts its own handover preparation message and is using business feature type;

2) If adjacent UEs in the same cell have a handover intention after receiving the message, they will identify their current service feature type and compare it with the service feature type used by the initial UE. If they are of the same type, they will send handover join information to the initial UE and Make preparations for handover, and if they are different, give up performing handover together. If there is no handover intention, directly ignore the handover information of the initial UE;

3) The initial UE receives the joining information sent by the adjacent UEs, classifies them into a group, and then sends switching information such as the number of group members to the PAR;

4) PAR sends a handover command to the access router (new access router, NAR) of the surrounding available cell network. After NAR determines its own network status, it returns to PAR the optional priority of the weight of the target cell;

5) After the initial UE is confirmed by the PAR handover, the team members perform handover to the target cell together.

In this embodiment, all UEs are multi-mode mobile user equipments capable of working in different networks, and all include entities that receive handover information and service feature types, send joining handover requests, and service feature identification. The network status includes, but is not limited to, signal status (RSRP/RSRQ), load status, and service QOS performance (including bandwidth, delay, jitter, packet loss rate, etc.) guarantee.

The types of service features include, but are not limited to: conversational, streaming media, interactive, and background. The sensitivity of business feature types and QOS performance is shown in Table 1:

Table 1

business feature type bandwidth time delay jitter Packet loss rate Conversation weak powerful powerful weak streaming media powerful weak powerful middle Interactive class middle powerful weak powerful background class middle weak weak powerful

The handover intention includes, but is not limited to: (1) the target cell RSRP/RSRQ is higher than the current cell RSRP/RSRQ; (2) the target cell has a lighter load; (3) the target cell can provide higher QOS performance.

The execution handover described above can be determined by a variety of network selection methods. This patent uses the fuzzy analytic hierarchy process to calculate the weight value of the target cell, which can efficiently deal with the uncertainty of each parameter in the heterogeneous small cell network, and obtain a more reasonable cell. Choose priority.

Described PAR and (or) NAR include: (1) regularly monitor self network state; The input of AHP; (3) Periodically update the parameters in the existing list, and the update period is selected as 1 hour.

The fuzzy analytic hierarchy process uses the obtained network state parameters to dynamically adjust the parameter weights to generate an intelligent switching strategy.

Fig. 3 is an exemplary structural block diagram of a service feature identification entity in the present invention. As shown in the figure, the entity includes the following modules: a trigger module, a judging module, and an execution module; the function of the trigger module is mainly, according to the received initial UE Switch the preparation information, trigger the identification of the service feature type being used by itself, and send it to the judgment module as the basis for judgment; the judgment module realizes comparing its own service feature type with the service feature type sent by the initial UE broadcast, and obtains the result ; The execution module will determine whether the UE needs to join the handover preparation process of the initial UE according to the judgment result. The trigger module identifies its own service feature type on the basis of its own DPI unit. The DPI unit obtains the user URL according to the current transmission service record, and judges the service feature category to which the user URL belongs.

The method also includes: when a group of n UEs are successfully handed over to a certain target cell, the weight of the selected target cell decreases by n*w%, and the weight of the previously located cell increases by n*w%; Below a certain lower limit threshold (that is, the load is heavy at this time) or the current cell network can only support one UE but cannot support multiple UEs to complete the handover, the cell will not become a candidate cell for UEs until the cell network When the service transmission of some UEs is completed or has been handed over to other cells, they will participate in the candidate of the target cell again.

Finally, it should be noted that the above preferred 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 through the above preferred embodiments, those skilled in the art should understand that it can be described in terms of form and Various changes may be made in the details without departing from the scope of the invention defined by the claims.

Claims (4)

1. A multi-user handover method based on service characteristics in a 5G network, characterized in that: a group of user equipments (UEs) can simultaneously switch from the same cell network to another same cell network under the same service characteristics, specifically including The following steps: 1) The initial user equipment (UE) sends a handover request to the current access router PAR (previous access router), and the PAR will return an instruction to make the initial UE prepare for handover, and then the initial UE broadcasts and sends its own handover preparation message and the current access router. business feature type; 2) If adjacent UEs in the same cell have a handover intention after receiving the message, they will identify their current service feature type and compare it with the service feature type used by the initial UE. If they are of the same type, they will send handover join information to the initial UE and Make preparations for handover, and if they are different, give up performing handover together. If there is no handover intention, directly ignore the handover information of the initial UE; 3) The initial UE receives the joining information sent by the adjacent UEs, classifies them into a group, and then sends switching information such as the number of group members to the PAR; 4) PAR sends a switching command to the access router NAR (new access router) of the surrounding available cell network. After NAR determines its own network status, it returns to PAR the optional priority of the target cell weight; 5) After the initial UE is confirmed by the PAR handover, the team members perform handover to the target cell together; In this method, all UEs are multi-mode mobile user equipment capable of working in different networks, and all include an entity for receiving handover information and service feature type, an entity for sending join handover request, and a service feature identification entity; The network status described in the method includes signal conditions, load conditions and service QOS performance guarantee; the service feature types include: session class, streaming media class, interactive class and background class; The handover intention described in the method includes: the RSRP/RSRQ of the target cell is higher than the RSRP/RSRQ of the current cell; the load of the target cell is lighter; the target cell can provide higher QOS performance for the current service characteristics; In the implementation of the handover, fuzzy analytic hierarchy process is used to calculate the weight value of the target cell, and the network state is used to dynamically adjust its parameter weight to generate an intelligent handover strategy; The PAR or NAR described in the method includes: regularly monitoring the state of its own network; storing the signal situation obtained by monitoring, the network load situation, and the service QOS performance index that can be provided into a designated list, as the input of the fuzzy analytic hierarchy process; Periodically update the parameters in the existing list, and the update period is selected as 1 hour; The business feature identification entity includes the following modules: a trigger module, a judgment module, and an execution module; The function of the triggering module is mainly, according to the received initial UE handover preparation information, triggering and identifying the type of service feature being used by itself, and sending it to the judging module as a basis for judging; The judging module realizes comparing its own service type with the service characteristic type sent by the initial UE broadcast, and obtains a result; The execution module will determine whether the UE needs to join the handover preparation process of the initial UE according to the judgment result. 2. The multi-user handover method based on service characteristics in a 5G network according to claim 1, characterized in that: the trigger module identifies its own service characteristic type on the basis of its own DPI unit. 3. The multi-user switching method based on service characteristics in a 5G network according to claim 2, wherein the DPI unit obtains the user uniform resource locator URL (Uniform ResourceLocator) according to the current transmission service record , to determine the service feature category to which the user URL belongs. 4. A multi-user handover method based on service characteristics in a 5G network according to claim 1, characterized in that: the method also includes: when a group of n UEs are successfully handed over to a certain target cell, selected The weight of the target cell decreases by n*w%, and the weight of the previous cell increases by n*w%; when the cumulative weight of a cell network is lower than a certain lower limit threshold or the current cell network can only support 1 UE but cannot support multiple UEs to complete Handover, the cell will not become a candidate cell for UEs, until the service transmission of some UEs in the cell network is completed or has been handed over to another cell, it will participate in the candidate of the target cell again.