A packet handover method in an energy saving mode

Abstract

The application relates to a packet switching method in an energy-saving mode and belongs to the technical field of communication. The packet method is used to dynamically manage the access and switching of users, provide sufficient services for existing users, improve the switching efficiency, and make the cells not overloaded and resources not wasted. The packet switching method mainly groups and divides the switching users and energy-saving compensation cells according to the service types of the users, and dynamically divides the user groups and carries out the access of the user groups according to the size relationship between the required resources of the users and the provided resources of the compensation cells. The method fully guarantees the service demand of the users and improves the utilization rate of the cell resources.

Description

Technical Field

[0001] This invention belongs to the field of communication technology and relates to a packet handover method in energy-saving mode. Background Technology

[0002] In the wireless network energy-saving technology system, it can be mainly divided into three technical fields: device level, site level, and network level. Device-level energy saving mainly utilizes new materials and technologies to reduce equipment energy consumption. Site-level energy saving mainly involves shutting down temporarily unused radio frequency hardware resources based on network load conditions, thereby achieving power and resource savings. Network-level energy saving primarily employs multi-cell cooperation, using algorithms to implement cell shutdown and wake-up based on current network configuration, performance requirements, and user parameters. This invention mainly reduces system resource consumption at the network level.

[0003] In mobile communication networks, energy saving is achieved by switching base stations on and off. Base stations can proactively detect network conditions to trigger energy-saving operations, or passively manage the operating status of each base station through a centralized controller, and finally announce the operating status of each base station through an interface. Base station wake-up can be triggered by itself or by a neighboring base station sending a request to wake up a dormant base station to share the high load in the network. Regardless of whether it is distributed or centralized energy-saving management, the design process is similar. In the initial phase of energy-saving operation, all base stations periodically broadcast their cell configuration information and relevant useful information, such as load, user information, and base station power allocation, to neighboring base stations. Based on this information, the energy-saving algorithm is triggered to make decisions on changes in the cell's operating state. Finally, the results of the decisions are executed, and each base station enters the corresponding operating state.

[0004] Global cell status detection based on real-time information exchange requires periodic exchange of useful information between network nodes. Once the load of a local cell falls below a set threshold, and information exchange reveals that neighboring cells are not yet at load saturation and can accommodate local users, the local cell's eNB can enter energy-saving mode, and users can switch to the neighboring base station. When the load of a neighboring base station increases, signaling is sent to wake up the energy-saving cell, reducing load pressure. The triggering of energy saving is determined by both internal information within the local cell and information exchanged with neighboring cells. The entire signaling interaction includes three phases: initialization (information exchange); sending a shutdown notification and wake-up request once energy-saving conditions are met; and confirmation and execution upon receiving the notification. Global cell status detection based on real-time information exchange can fully utilize every energy-saving opportunity and considers user QoS, with accurate timing for activation and wake-up. However, the frequent signaling interactions increase system complexity.

[0005] This invention proposes a group handover method in energy-saving mode. First, it determines whether the power resources required for handover in the energy-saving cell are less than the idle power resources in the energy-compensating cell, thus deciding whether all cells should adopt energy-saving operation. Then, it determines the user type in each compensation cell to select the appropriate user type for access. Finally, it selects the appropriate compensation cell for handover operation based on the user's service type. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a grouping handover method in energy-saving mode. Switching from normal mode to energy-saving mode or between different energy-saving modes in a cell can cause users to randomly switch to other adjacent energy-compensated cells, potentially failing to meet the service needs of all users. To provide sufficient quality and quantity of service to existing users in energy-compensated cell mode and to improve handover efficiency, users can be grouped in energy-saving cells based on user information. However, this raises several issues, such as: what user information to group based on, the number of users that different energy-saving modes can handle, and the proportion of different types of users in energy-saving cells. To address these issues, this invention proposes a user grouping method based on different cell energy-saving modes and dynamically manages user access and handover through this grouping method, preventing cell overload and resource waste.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A group switching method in an energy-saving mode, the method includes two stages: preparing user groups and group switching;

[0009] The user grouping preparation is as follows:

[0010] Mobile communication systems define four types of user services: session type, streaming type, interactive type, and background type; users are distinguished according to their service type, and then categorized into these four types of users.

[0011] Based on the required transmission rate, users are divided into two main categories, specifically three user groups. First, since session-type and streaming-type users have certain transmission rate requirements, these two types of users are grouped into the same category, named the "High Transmission Rate Requirement Class." Interactive and background-type users are grouped into another category, the "Low Transmission Rate Requirement Class." Then, two-thirds of the users in the High Transmission Rate Requirement Class are randomly assigned to User Group 1, two-thirds of the users in the Low Transmission Rate Requirement Class are randomly assigned to User Group 2, and the remaining users form User Group 3. These users are then grouped and connected to the energy-saving compensation cell. The energy-saving compensation cell is further divided into two categories based on the user type: High Transmission Rate Cell and Low Transmission Rate Cell. A Low Transmission Rate Cell is one where interactive and background-type users outnumber the other two types (represented as Cell 1). A High Transmission Rate Cell is one where session-type and streaming-type users outnumber the other two types (represented as Cell 2).

[0012] The group switching is as follows:

[0013] The centralized controller calculates the power resources required for switching users to support their own services in all energy-saving communities, using P... N This indicates the power resources required by all users; and, by calculating the idle power resources of all energy-saving cells through the central controller, the power resources that can be provided to users during switching can be determined; using P C This represents the idle power resources in all energy-saving compensation communities; if the power resource P required by the user... N The idle resources P of the community that are greater than the energy-saving compensation C This indicates that the energy-saving compensation cell cannot connect all users during handover. The number of energy-saving cells should be reduced, i.e., the number of users during handover, until the power resources required by the users during handover are less than the available resources of the energy-saving compensation cell. Otherwise, the number of energy-saving cells should be gradually reduced. After determining that the available resources of the energy-saving compensation cell are greater than the resources required by the users during handover, the number of users in user group 1 and user group 2 should be determined. If the number of users in user group 1 is greater than the number of users in user group 2, the access situation of user group 1 should be analyzed first; otherwise, the access situation of user group 2 should be analyzed first.

[0014] Optionally, if the number of users in user group 1 is greater than the number of users in user group 2, determine whether the power resources required by user group 1 are less than the available power resources that cell 1 can provide; if the available power resources that cell 1 can provide are less than the resources required by user group 1, then some users of user group 1 are switched to cell 1, and the remaining unconnected users are merged into user group 3; all users of user group 3 and user group 2 are connected to cell 2; if the available power resources that cell 1 can provide are greater than the resources required by user group 1, then all users of user group 1 are switched to cell 1; determine whether cell 1 still has available resources, if there are available resources, then some users of user group 2 are switched to cell 1; if there are no available resources in cell 1 at this time, it means that cell 1 can just fully serve the users of user group 1; the remaining users are connected to cell 2.

[0015] If the number of users in user group 2 is greater than the number of users in user group 1, determine whether the power resources required by user group 2 are less than the available power resources that cell 2 can provide. If the available power resources that cell 2 can provide are greater than the resources required by user group 2, then all users in user group 2 are switched to cell 2. Then, determine whether there are any remaining available resources in cell 2. If there are still extra available power resources, some users from user group 1 are connected to cell 2. If there are no available resources in cell 2 at this time, it means that cell 2 is fully serving the users from user group 2. The remaining users from user group 3 and user group 1 are connected to cell 2. If the available power resources that cell 2 can provide are less than the resources required by user group 2, then some users from user group 2 are switched to cell 2, and the remaining unconnected users are merged into user group 3. All users from user group 3 and user group 1 are connected to cell 1.

[0016] The beneficial effects of this invention are as follows:

[0017] First, determine whether the power resources required by users in the energy-saving community are less than the idle power resources that the compensation community can provide. Otherwise, reduce the number of communities that need energy saving through the central controller. That is, some communities that need energy saving receive users from other energy-saving communities, thereby increasing the number of users to exceed the energy-saving threshold.

[0018] Then, the service types of the original users in the energy-saving compensation community and the proportion of users with different service types were analyzed, and user groups were divided according to the different service types of the switching users.

[0019] Finally, based on the user information provided by the central controller and the information of the energy-saving compensation community, the user handover and community access are selected.

[0020] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 For multi-community collaborative energy-saving systems;

[0023] Figure 2 A flowchart of the community's energy-saving mechanism;

[0024] Figure 3 This is a flowchart of the group switching method. Detailed Implementation

[0025] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0028] This invention designs a grouping and handover method under a cell energy-saving mode to achieve rational utilization of system resources. Switching a cell from normal operating mode to energy-saving mode, or between different energy-saving modes, may result in the inability to meet the service needs of all users, thus causing some users to switch to other adjacent cells. Therefore, by grouping users by energy-saving cells, sufficient quality and quantity of service can be provided to existing users under the system's energy-saving mode. This invention considers energy-saving operations in multiple cells, such as... Figure 1 As shown, this invention divides energy-saving compensation cells based on the proportion of users with different service types. Furthermore, users are grouped according to different service types. Different user groups have different service types, thus requiring different power resources from the cell. Different user groups access different energy-saving compensation cells. User access and handover are dynamically managed through a grouping strategy, preventing cell overload and resource waste. The specific implementation process of this solution consists of the following two stages.

[0029] Phase 1: Preparing User Groups

[0030] During off-peak hours, the cell network changes its state to enter a low-power operating mode. Base stations perform energy-saving operations, changing their operating state. Different energy-saving states are defined as follows: Normal state: The cellular network does not perform any energy-saving operations, maintaining full power operation for all devices without any energy reduction; Energy-saving state: The cellular network employs certain energy-saving mechanisms to put some or all network devices in a low-power state. In this state, the devices may be turned off or in hibernation; Energy-saving compensation state: During the execution of energy-saving mechanisms, some network devices, while maintaining normal operation, need to adjust their transmission power to compensate for the impact of surrounding base stations entering energy-saving states. For example, in a cellular network structure, after one base station enters energy-saving state, one or more surrounding base stations need to expand their coverage area to fill coverage gaps. In this case, the base station expanding its coverage enters energy-saving compensation state.

[0031] In mobile communication networks, energy saving is achieved by switching base stations on and off. A centralized resource manager (CRM) manages the operational status of each base station and communicates this status via an interface. Base station wake-up can be triggered automatically or by neighboring base stations sending requests to awaken dormant base stations, thus sharing the high load on the network. In the centralized energy-saving management initialization phase, all base stations periodically broadcast their cell configuration information and relevant useful information, such as load, user information, and base station power allocation, to neighboring base stations. Based on this information, energy-saving algorithms are triggered to make decisions regarding cell operational status transitions. Finally, the results of these decisions are executed, and each base station enters the corresponding operational state. The flowchart of the entire energy-saving mechanism is as follows: Figure 2 As shown in the flowchart, the triggering condition in global cell status detection is based on real-time information interaction. Global cell status detection based on real-time information interaction requires periodic exchange of useful information between network nodes. Once it is found that the load of the local cell is below a set threshold, and through information interaction it is discovered that neighboring cells have not reached load saturation and can accommodate the users of the local cell, the local cell's eNB can enter energy-saving mode, and users can switch to the neighboring base station. When the load of the neighboring base station increases, it will send signaling to wake up the cell in energy-saving mode to reduce load pressure. The triggering of energy saving is jointly determined by the internal information of the local cell and the interaction information of neighboring cells. The entire signaling interaction includes three stages: initialization stage for information interaction; once the energy-saving condition is met, a shutdown notification and a wake-up request are sent; and confirmation and execution are performed upon receiving the notification. Global cell status detection based on real-time information interaction can fully utilize every opportunity for energy saving and consider the user's QoS to execute the activation and wake-up.

[0032] Mobile communication systems define four types of user services: session, stream, interaction, and background. The main difference between these types lies in their sensitivity to latency. Session services must maintain the temporal variability of information entities within the stream, making them highly demanding in terms of latency and requiring high data transmission rates. Stream services must maintain the temporal relationships between information entities within the stream, requiring a certain level of latency. Interaction services operate on a request-response model, requiring the integrity of data information. Background services, on the other hand, have virtually no time constraints for the receiving end, only needing to maintain data integrity, thus having the lowest rate requirements. Therefore, users can be differentiated based on their service type, and users can be categorized into four types.

[0033] Based on transmission rate requirements, users can be divided into two main categories, specifically three user groups. First, since session-type and streaming-type users have certain transmission rate requirements, these two types of users are grouped into the same category. For ease of representation, this category is named the "High Transmission Rate Requirement Class." Compared to session-type and streaming-type users, interactive-type and background-type users do not have strict transmission rate requirements, so they are grouped into another category. This category is called the "Low Transmission Rate Requirement Class." Then, 2 / 3 of the users in the High Transmission Rate Requirement Class are randomly assigned to User Group 1, 2 / 3 of the users in the Low Transmission Rate Requirement Class are randomly assigned to User Group 2, and the remaining users are assigned to User Group 3. These users are then grouped and connected to the energy-saving compensation cell. Similarly, energy-saving compensation cells can also be divided into two categories based on user type: high transmission rate cells and low transmission rate cells. A low transmission rate cell refers to an energy-saving compensation cell where interactive-type and background-type users outnumber the other two types; this can also be represented as Cell 1. A high-rate cell refers to a cell where the number of users of session type and flow type is greater than the number of users of the other two types in an energy-saving compensation cell; it can also be represented as cell 2.

[0034] Phase 2: Group Switching Method

[0035] The second phase mainly involves switching user groups, and its main process is as follows: Figure 3 As shown. First, the power resources required for switching users to support their own services in all energy-saving communities are calculated by the central controller, using P... N This indicates the power resources required by the users. Furthermore, the centralized controller calculates the idle power resources of all energy-saving zones, thus providing the power resources available to users during switching. Using P... C This represents the idle power resources in all energy-saving compensation communities. If the power resource P required by the user... N The idle resources P of the community that are greater than the energy-saving compensation C This indicates that the energy-saving compensation cell cannot accommodate all handover users at this time. Therefore, the number of energy-saving cells needs to be reduced, which means reducing the number of handover users, until the power resources required for handover users are less than the available resources of the energy-saving compensation cells. Otherwise, the number of energy-saving cells should be gradually reduced. After determining that the available resources of the energy-saving compensation cells are greater than the resources required for handover users, the number of users in user group 1 and user group 2 is then assessed. If the number of users in user group 1 is greater than the number of users in user group 2, the access situation of user group 1 is analyzed first; otherwise, the access situation of user group 2 is analyzed first.

[0036] If the number of users in user group 1 is greater than the number of users in user group 2, it is determined whether the power resources required by user group 1 are less than the available power resources that cell 1 can provide. If the available power resources that cell 1 can provide are less than the resources required by user group 1, some users of user group 1 are switched to cell 1, and the remaining unconnected users are merged into user group 3. Since the overall available resources are greater than the required resources, all users switching from user group 3 and user group 2 can be connected to cell 2. If the available power resources that cell 1 can provide are greater than the resources required by user group 1, all users of user group 1 are switched to cell 1. At this time, it is still necessary to determine whether cell 1 still has available resources. If there are remaining available resources, some users of user group 2 are switched to cell 1. If cell 1 has no available resources at this time, it means that cell 1 can just fully serve the users switching from user group 1. Subsequently, the remaining users switching are connected to cell 2.

[0037] If the number of users in user group 2 is greater than the number of users in user group 1, determine whether the power resources required by user group 2 are less than the available power resources that cell 2 can provide. If the available power resources that cell 2 can provide are greater than the resources required by user group 2, then all users in user group 2 are switched to cell 2. Next, determine whether there are any remaining available resources in cell 2. If there are still surplus available power resources, some users from user group 1 are connected to cell 2. If there are no available resources in cell 2 at this time, it means that cell 2 can fully serve the users from user group 2. Subsequently, the remaining users from user group 3 and user group 1 are connected to cell 2. If the available power resources that cell 2 can provide are less than the resources required by user group 2, then some users from user group 2 are switched to cell 2, and the remaining unconnected users are merged into user group 3. Similarly, since the overall available resources are greater than the required resources, all users from user group 3 and user group 1 can be connected to cell 1.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A group switching method in an energy-saving mode, characterized in that: This method includes two phases: preparing user groups and switching groups. The user grouping preparation is as follows: Mobile communication systems define four types of user services: session type, streaming type, interactive type, and background type; users are distinguished according to their service type, and then categorized into these four types of users. Based on transmission rate requirements, users are divided into two main categories, specifically three user groups. First, since session-type and streaming-type users have certain transmission rate requirements, these two types of users are grouped into the same category, named the high transmission rate requirement class. Interactive and background-type users are grouped into another category, the low transmission rate requirement class. Then, 2 / 3 of the users in the high transmission rate requirement class are randomly assigned to user group 1, and 2 / 3 of the users in the low transmission rate requirement class are randomly assigned to user group 2. The remaining users form user group 3. These users are then grouped and accessed into the energy-saving compensation cell. The energy-saving compensation cell is further divided into two categories based on user type: high transmission rate cell and low transmission rate cell. A low transmission rate cell (represented as cell 2) is one where interactive and background-type users outnumber the other two types. A high transmission rate cell (represented as cell 1) is one where session-type and streaming-type users outnumber the other two types. The group switching is as follows: The centralized controller calculates the power resources required for switching users to support their own services in all energy-saving communities. This represents the power resources required by all users during handover; and, through the central controller, the idle power resources of all energy-saving compensation cells are calculated, which is the power resources that can be provided to users during handover; using This represents the available power resources in all energy-saving compensation communities; if the user requires power resources... Idle resources in communities exceeding energy-saving compensation This indicates that the energy-saving compensation cell cannot connect all users at this time. Reduce the number of energy-saving cells, that is, reduce the number of users to be switched, until the power resources required by the users to be switched are less than the size of the idle resources of the energy-saving compensation cell. After determining that the idle resources of the energy-saving compensation cell are greater than the resources required by the users to be switched, then determine the number of users in user group 1 and user group 2. If the number of users in user group 1 is greater than the number of users in user group 2, then analyze the access situation of user group 1 first; otherwise, analyze the access situation of user group 2 first. If the number of users in user group 1 is greater than the number of users in user group 2, determine whether the power resources required by user group 1 are less than the available power resources that cell 1 can provide; if the available power resources that cell 1 can provide are less than the resources required by user group 1, then switch some users of user group 1 to cell 1, and merge the remaining unconnected users into user group 3; then connect all the users of user group 3 and user group 2 to cell 2. If the available idle power resources provided by cell 1 are greater than the resources required by user group 1, then all users of user group 1 will be switched to cell 1; it will be determined whether there are any idle resources in cell 1. If there are any remaining idle resources, then some users of user group 2 will be switched to cell 1. If there are no idle resources in cell 1 at this time, it means that cell 1 can just fully serve the users of user group 1 who are switching over; the remaining users who are switching over will be connected to cell 2. If the number of users in user group 2 is greater than the number of users in user group 1, determine whether the power resources required by user group 2 are less than the available power resources that cell 2 can provide. If the available power resources that cell 2 can provide are greater than the resources required by user group 2, then all users in user group 2 are switched to cell 2. Then, determine whether there are any remaining available resources in cell 2. If there are still extra available power resources, some users from user group 1 are connected to cell 2. If there are no available resources in cell 2 at this time, it means that cell 2 is fully serving the users from user group 2. The remaining users from user group 3 and user group 1 are connected to cell 1. If the available power resources that cell 2 can provide are less than the resources required by user group 2, then some users from user group 2 are switched to cell 2, and the remaining unconnected users are merged into user group 3. Finally, all users from user group 3 and user group 1 are connected to cell 1.

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