CN113596990A - Method and equipment for supporting paging optimization - Google Patents
Method and equipment for supporting paging optimization Download PDFInfo
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- H04W68/04—User notification, e.g. alerting and paging, for incoming communication, change of service or the like multi-step notification using statistical or historical mobility data
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Abstract
The application discloses a method and equipment for supporting paging optimization, wherein first, a first base station receives UE historical access information from UE, a second base station or a core network; then, the first base station generates paging recommendation information according to the historical access information of the UE, sends the paging recommendation information to the core network, generates paging auxiliary information according to the received paging recommendation information by the core network, sends the paging auxiliary information to the corresponding base station, and finally, the base station receiving the paging area determines a cell for sending the paging information according to the paging area. The invention helps the core network to determine the paging strategy through various information such as the historical access information of the UE, the location area information of the UE, the position of the UE in the cell, the speed of the UE and the like, thereby realizing the purposes of reducing the paging issuing of an S1 interface, reducing the paging range and reducing the paging resources. Especially for stationary or low-speed moving UE, the invention can reduce paging resource significantly.
Description
The invention is a divisional application of an invention patent application with the application number of 201510250250.5 and the application date of 2015, 05 and 15, and the name of the invention is 'method and equipment for supporting paging optimization'.
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a method and an apparatus for supporting paging optimization.
Background
Modern mobile communications are increasingly tending to provide users with high-rate transmission multimedia services, as shown in fig. 1, which is a system architecture diagram of System Architecture Evolution (SAE). Wherein:
a User Equipment (UE)101 is a terminal device that supports a network protocol. An evolved universal terrestrial radio access network (E-UTRAN)102 is a radio access network that includes base stations (eNodeB/NodeB) that provide access to a radio network interface for UEs. A Mobility Management Entity (MME)103 is responsible for managing mobility context, session context and security information of the UE. Serving Gateway (SGW)104 mainly provides the functions of the user plane, and MME 103 and SGW 104 may be in the same physical entity. A packet data network gateway (PGW)105 is responsible for charging, lawful interception, etc., and may also be in the same physical entity as the SGW 104. A Policy and Charging Rules Function (PCRF)106 provides quality of service (QoS) policy and charging criteria. The general packet radio service support node (SGSN)108 is a network node device in the Universal Mobile Telecommunications System (UMTS) that provides routing for the transmission of data. The Home Subscriber Server (HSS)109 is the home subsystem of the UE and is responsible for protecting user information including the current location of the user equipment, the address of the serving node, user security information, the packet data context of the user equipment, etc.
In existing networks, paging a UE is paging under all base stations in the UE's location area list. When the UE is in a relatively stationary state or moving at a low speed, the range of the cell where the UE is located is limited, and many paging resources are wasted when all location areas are paged.
Disclosure of Invention
In order to solve the problem of paging resource waste, the invention provides a method and equipment for supporting paging optimization so as to optimize paging and reduce paging resources.
The invention provides a method for supporting paging optimization, which comprises the following steps:
the method comprises the steps that a first base station receives UE historical access information from User Equipment (UE), a second base station or a core network;
and the first base station generates paging recommendation information according to the historical access information of the UE and sends the paging recommendation information to the core network.
Preferably, the UE historical access information is a cell of a location area supporting the UE, which is screened by the UE, the second base station, or the core network according to the location area information of the UE; the location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Preferably, the UE historical access information includes at least one of the following information: cell information of a UE historical passing cell, cell information of adjacent cells of each historical passing cell, and historical change information of a UE coverage grade; the history change information of the coverage level of the UE is information of a set of coverage levels that the UE sequentially passes through.
Preferably, the paging recommendation information includes at least one of the following information: recommending cell information of a cell, position information of a last resident cell before UE release, UE rate and historical change information of a UE coverage grade; the history change information of the coverage level of the UE is information of a set of coverage levels that the UE sequentially passes through.
Preferably, the first base station determines the recommended cell according to the historical access information of the UE.
Preferably, the first base station further screens out cell information of a recommended cell supporting the UE location area according to the location area information of the UE, and sends the cell information to the core network, wherein the cell information is included in the paging recommendation information;
or the first base station includes the cell information of all recommended cells in the paging recommendation information and sends the paging recommendation information to the core network.
Preferably, the location information of the last camped cell before the UE releases includes at least one of the following information: the cell center, the cell edge, the distance between the UE and the cell center, the distance between the UE and the cell edge, the position grade of the cell, the coverage grade information of the UE in the cell, and the historical change information of the coverage grade of the UE in the cell.
Preferably, the rate of the UE comprises at least one of the following information: static, static relative to the cell, low speed, medium speed, high speed, rate grade; wherein, the relative cell stationary means that the UE does not move out of the range of the cell.
Preferably, the cell information includes at least one of the following information: the method comprises the steps of identifying a cell, identifying a base station to which the cell belongs, identifying a location area to which the cell belongs, identifying time for UE to enter the cell, time for UE to leave the cell, time for UE to be in the cell, identifying the adjacent area of the cell, identifying the base station to which the adjacent area of the cell belongs, and covering grade information of the UE in the cell.
Preferably, the coverage level information of the UE includes at least one of the following information: the coverage enhancement level of the UE, the time for the UE to enter the coverage enhancement level, the time for the UE to leave the coverage enhancement level, the time length of the UE in the coverage enhancement level, the coverage state level of the UE, the time for the UE to enter the coverage state level, the time for the UE to leave the coverage state level, and the time length of the UE in the coverage state level.
The present invention also provides an apparatus comprising: a first receiving module and a first sending module, wherein:
the first receiving module is used for receiving UE historical access information from the UE, the second base station or the core network;
and the first sending module is used for generating paging recommendation information according to the historical access information of the UE and sending the paging recommendation information to the core network.
The invention also provides a method for supporting paging optimization, which comprises the following steps:
the core network receives paging recommendation information from a base station;
and the core network generates paging auxiliary information according to the received paging recommendation information and sends the paging auxiliary information to a corresponding base station.
Preferably, the paging assistance information includes a paging area, the paging area includes a group of paging cells, and the cell information of the paging cells includes at least one of the following information: the method comprises the steps of identifying a cell, identifying a base station to which the cell belongs, identifying a location area to which the cell belongs, identifying time for UE to enter the cell, time for UE to leave the cell, time for UE to be in the cell, identifying the adjacent area of the cell, identifying the base station to which the adjacent area of the cell belongs, and covering grade information of the UE in the cell.
Preferably, the paging assistance information further includes at least one of the following information: history change information of the coverage grade of the UE, the coverage enhancement grade of the UE, the coverage state grade of the UE, the repeated paging frequency of the UE and the capability of the UE for listening to the repeated paging; the history change information of the coverage level of the UE is information of a set of coverage levels that the UE sequentially passes through.
Preferably, the paging recommendation information includes at least one of the following information: recommending cell information of a cell, position information of a last resident cell before UE release, UE rate and historical change information of a UE coverage grade; the history change information of the coverage level of the UE is information of a set of coverage levels that the UE sequentially passes through.
Preferably, the core network screens out a recommended cell supporting the UE location area as a paging area according to the paging recommendation information, and sends the paging area to the base station supporting the recommended cell or all base stations in the range of the UE location area;
or the core network takes the recommended cell in the paging recommendation information as a paging area, sends the paging area to all base stations supporting the recommended cell or in the range of the UE position area, and then screens the paging area by the base stations;
or, the core network determines the paging area according to the rate of the UE;
or, the core network determines a paging area according to the position of the last resident cell before the UE is released;
or, the core network determines the coverage enhancement level of the UE of the base station, the coverage state level of the UE or the repeated paging times of the UE according to the history change information of the coverage level of the UE.
Preferably, the history change information of the coverage level of the UE is information of a set of coverage levels that the UE sequentially passes through.
The coverage level information of the UE includes at least one of the following information: the coverage enhancement level of the UE, the time for the UE to enter the coverage enhancement level, the time for the UE to leave the coverage enhancement level, the time length of the UE in the coverage enhancement level, the coverage state level of the UE, the time for the UE to enter the coverage state level, the time for the UE to leave the coverage state level, and the time length of the UE in the coverage state level.
The present invention also provides an apparatus comprising: a second receiving module and a second sending module, wherein:
a second receiving module, configured to receive paging recommendation information from a base station;
and the second sending module is used for generating paging auxiliary information according to the received paging recommendation information and sending the paging auxiliary information to the corresponding base station.
The invention also provides a method for supporting paging optimization, which comprises the following steps:
the base station receives paging auxiliary information from a core network;
and the base station determines a cell for sending the paging message according to the paging auxiliary information.
Preferably, the paging assistance information includes a paging area, and the paging area includes a group of paging cells;
and the base station ignores the location area list in the paging message, and selects a cell supported by the base station from cells contained in a paging area sent by the core network to send the paging message.
Preferably, the base station selects a cell in the cell list to send the paging message, the selected cell is a cell supported by the base station, and the selected cell supports a location area in the location area list.
Preferably, if the paging assistance information includes the coverage enhancement level or the coverage status level of the UE, the base station determines a paging mode and the number of times of repeated paging according to the coverage enhancement level or the coverage status level of the UE;
if the paging auxiliary information contains the historical change information of the coverage grade of the UE, the base station selects the coverage enhancement grade or the coverage state grade of the UE with the highest possibility according to the historical change information of the coverage grade of the UE to determine a paging mode, and the paging repetition times; the historical change information of the coverage grade of the UE is information of a group of coverage grades which are sequentially passed by the UE;
if the paging auxiliary information contains the repeated paging times of the UE, the base station initiates the paging of the UE according to the indicated repeated times;
if the paging auxiliary information contains the capability of the UE for listening to the repeated paging, the base station does not initiate the repeated paging to the UE which does not have the capability of listening to the repeated paging.
Preferably, the coverage level information of the UE includes at least one of the following information: the coverage enhancement level of the UE, the time for the UE to enter the coverage enhancement level, the time for the UE to leave the coverage enhancement level, the time length of the UE in the coverage enhancement level, the coverage state level of the UE, the time for the UE to enter the coverage state level, the time for the UE to leave the coverage state level, and the time length of the UE in the coverage state level.
The present invention also provides an apparatus comprising: a third receiving module and a third sending module, wherein:
a third receiving module, configured to receive paging assistance information from a core network;
and a third sending module, configured to determine a cell to send a paging message according to the paging assistance information.
The invention also provides a method for supporting paging optimization, which comprises the following steps:
the method comprises the steps that a first base station receives the location area information of User Equipment (UE) from the UE, a second base station or a core network;
and the first base station generates paging recommendation information according to the location area information of the UE and sends the paging recommendation information to the core network.
Preferably, the paging recommendation information includes at least one of the following information: recommending cell information of the cell, position information of the last resident cell before UE release, and UE rate.
Preferably, the first base station further screens out cell information of a recommended cell supporting the UE location area according to the location area information of the UE, and sends the cell information to the core network, wherein the cell information is included in the paging recommendation information;
or the first base station includes the cell information of all recommended cells in the paging recommendation information and sends the paging recommendation information to the core network.
The present invention also provides an apparatus comprising: a fourth receiving module and a fourth sending module, wherein:
a fourth receiving module, configured to receive location area information of the UE from the UE, the second base station, or the core network;
and the fourth sending module is used for generating paging recommendation information according to the location area information of the UE and sending the paging recommendation information to the core network.
According to the technical scheme, the invention helps the core network to determine the paging strategy through the historical access information of the UE, the location area information of the UE, the position of the UE in the cell, the speed of the UE and the like, thereby reducing the paging issuing of an S1 interface, reducing the paging range and achieving the purpose of reducing the paging resources. Especially for stationary or low-speed moving UE, the reduction range of the paging resource is obvious by adopting the invention.
Drawings
FIG. 1 is a system architecture diagram of SAE;
FIG. 2 is a flowchart illustrating a first method for supporting paging optimization according to the present invention;
FIG. 3 is a flowchart illustrating a second method for supporting paging optimization according to the present invention;
FIG. 4 is a flowchart illustrating a third method for supporting paging optimization according to the present invention;
FIG. 5 is a flowchart illustrating a fourth method for supporting paging optimization according to the present invention;
FIG. 6 is a diagram illustrating a first embodiment of a method for supporting paging optimization according to the present invention;
FIG. 7 is a diagram of a second embodiment of a method for supporting paging optimization according to the present invention;
FIG. 8 is a diagram of a third embodiment of a method for supporting paging optimization according to the present invention;
FIG. 9 is a diagram of a fourth embodiment of the method for supporting paging optimization according to the present invention;
FIG. 10 is a diagram of a fifth embodiment of the method for supporting paging optimization according to the present invention;
FIG. 11 is a diagram of a sixth embodiment of the method for supporting paging optimization according to the present invention;
FIG. 12 is a diagram of a seventh embodiment of the method for supporting paging optimization according to the present invention;
fig. 13 is a diagram illustrating an eighth embodiment of a method for supporting paging optimization according to the present invention;
FIG. 14 is a diagram illustrating a ninth embodiment of the method for supporting paging optimization according to the present invention;
FIG. 15 is a schematic structural diagram of a first preferred apparatus according to the present invention;
FIG. 16 is a schematic structural diagram of a second preferred apparatus according to the present invention;
FIG. 17 is a schematic structural diagram of a third preferred apparatus according to the present invention;
FIG. 18 is a schematic structural diagram of a fourth preferred apparatus according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.
In the existing network, the core network paging the idle UE sends the paging message to all base stations in the location area list to which the UE belongs, and then the base stations send the paging message in the cell supporting the UE location area. The location area list to which the UE belongs is a location area where the core network is configured to the UE, and the UE does not initiate a location area update process due to a location area change when moving in the location areas. For a UE with a low stationary or low mobility or a UE with a limited mobility range, paging all location areas to which the UE belongs may cause a waste of paging resources. Therefore, the present invention proposes: the moving speed of the UE and the cells which are frequently resided can be determined through UE history information, so that the paging range of a core network is reduced. The UE history cell information includes a list of cells that the UE has historically passed through.
In order to achieve the objective of reducing the paging range of the core network through the UE history cell information, the following problems need to be solved:
problem 1: if the UE history cell information is transmitted from the source base station to the target base station during the UE handover, the UE history information is relayed and updated among a plurality of base stations as the UE moves, and then neither the base station nor the core network knows the location area supported by the cell in the UE history information. If the base station or the core network selects the recommended paging range from the cells in the UE history information and the neighboring cells thereof, and the selected cells do not support the location area to which the UE belongs, the paging message sent in the cells will cause the paging resource waste.
Problem 2: when the femtocell is connected to the core network through the femtocell gateway, the core network does not know how to send the paging message to the femtocell gateway to which the femtocell is connected.
Problem 3: when the UE is in a stationary state, moves at a low speed, or has a limited moving range, if the UE is in the center of the cell, it is highly likely that the UE can be paged when the UE last visits the cell, but if the UE is at the edge of the cell, the UE may choose to camp on a neighbor cell when the signal at the edge of the cell is unstable or the UE moves slightly. But the core network is not currently aware of the location of the UE in the cell and may not be able to determine the appropriate paging range.
Problem 4: the core network already knows the cell and base station where the UE last camped. When the UE is in a stationary state, moves at a low speed, or has a limited moving range in the last resident cell, the base station may not recommend any paging range to the core network; when the UE is in a high-speed moving state or the UE passes through multiple cells quickly, the base station may also not recommend a paging range to the core network, and the core network may still page the UE with all cells in the location area list where the UE resides. However, the core network cannot distinguish between these two situations and cannot decide which paging area should be used.
Problem 5: when the coverage is poor, some UEs may need to enter a coverage enhancement mode, that is, the UEs need to listen to paging repeatedly for multiple times to correctly decode paging messages or repeatedly send PRACH procedures to access the network; while in a good coverage state, the existing paging or the existing PRACH can suffice. However, the eNB does not know the coverage status of the UE when transmitting the paging message, and cannot determine an appropriate paging policy (resource location for paging, number of times of paging, etc.). For example, the eNB uses repeated paging and the UE happens to be in good coverage, and the repeated paging wastes paging resources; if the eNB employs existing paging and the UE happens to be in poor coverage, the UE is unreachable.
Problem 6: for the UE which does not support repeated listening paging, the base station does not need to adopt repeated paging.
How the present invention solves the above technical problems is explained in detail below with reference to the accompanying drawings.
Fig. 2 is a flowchart illustrating a first method for supporting paging optimization according to the present invention, which illustrates how a base station obtains UE historical access information, and includes the following steps:
step 201: the first base station receives UE historical access information from the UE, the second base station or the core network.
Optionally, the UE historical access information includes at least one of the following information: cell information of a UE history passing cell, cell information of a neighboring cell of each history passing cell, and history change information of a UE coverage level. The history change information of the coverage level of the UE is information of a set of coverage levels that the UE sequentially passes through.
Optionally, the cell information of the UE passing through the cell in history may include cell information of the UE passing through the cell in history in a connected state and/or cell information of the UE passing through the cell in history in an idle state.
The cell information may contain at least one of the following information: the cell identifier, the base station identifier to which the cell belongs, the location area identifier to which the cell belongs, the time for the UE to enter the cell, the time for the UE to leave the cell, the duration of the UE in the cell, the neighbor cell identifier of the cell, the base station identifier to which the neighbor cell belongs, and the history change information of the coverage level of the UE in the cell (that is, each cell identifier corresponds to the coverage level information that a group of UEs sequentially passes through).
The coverage level information of the UE includes at least one of: the coverage enhancement level of the UE, the time for the UE to enter the coverage enhancement level, the time for the UE to leave the coverage enhancement level, the time length of the UE in the coverage enhancement level, the coverage state level of the UE, the time for the UE to enter the coverage state level, the time for the UE to leave the coverage state level, and the time length of the UE in the coverage state level.
The coverage enhancement level of the UE is related to the coverage status level of the UE, e.g., the worse the coverage status level of the UE, the higher the coverage enhancement level of the UE. The coverage enhancement levels of the UEs correspond to different repeated paging times, respectively. Such as: when the coverage state of the UE is good, the UE does not need coverage enhancement and does not need repeated paging; when the coverage state of the UE is poor, the number of times of repeated paging corresponding to the coverage level of the relevant UE is large; when the coverage state of the UE is poor, the number of repeated paging corresponding to the relevant coverage class is less.
In some embodiments, when the UE, the second base station, or the core network sends the UE historical access information, the cell supporting the UE location area may be screened out according to the UE location area information, and only the cell supporting the UE home location area is sent to the first base station. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Step 202: the first base station may generate paging recommendation information according to the UE historical access information, and send the paging recommendation information to the core network.
Fig. 3 is a flowchart illustrating a second method for supporting paging optimization according to the present invention, which illustrates how a base station generates paging recommendation information, and includes the following steps:
step 301: and the first base station generates paging recommendation information and sends the paging recommendation information to the core network.
Optionally, the first base station may send the historical access information of the UE to the core network as the paging recommendation information.
Optionally, the paging recommendation information includes at least one of the following information: recommending cell information of the cell, position information of the last resident cell before UE release, and UE rate. The cell information content of the recommended cell is as described in the cell information in step 201, and is not described herein again.
Optionally, the first base station may determine a recommended cell according to the UE historical access information, and the UE historical access information and the cell information are as described in step 201.
In some embodiments, the first base station sends only cell information of a recommended cell supporting the UE location area to the MME, i.e., the paging recommendation information does not include a cell or a base station not supporting the UE location area. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides. The first base station may obtain UE location area information from the UE, the second base station, or the core network.
In other embodiments, the first base station does not filter the recommended cell information according to the UE location area, but sends the cell information of all recommended cells to the MME.
The location information in the last camped cell before the UE release may contain at least one of the following information: cell center, cell edge, distance between UE and cell center, distance between UE and cell edge, location grade of cell, and coverage grade information of UE in cell.
The coverage level information of the UE is described in step 201, and is not described herein again. The position of the cell can be represented by the coverage state grade of the UE or the coverage enhancement grade of the UE, when the coverage state grade of the UE is better, the UE is closer to the center of the cell, and when the coverage state grade of the UE is worse, the UE is closer to the edge of the cell. The coverage enhancement level of the UE may be related to the coverage status level of the UE, such as the worse the coverage status level, the higher the coverage enhancement level of the UE, and the more paging times that need to be repeated. The first base station can also judge that the UE is in the center or the edge of the cell according to the signal strength of the UE.
The rate of the UE may include at least one of the following information: static, static relative to the cell, low speed, medium speed, high speed, rate level. Optionally, the base station may determine the rate of the UE according to the historical access information of the UE. Relative cell stationary refers to the UE not moving out of the range of the cell, and may be moving or stationary within the cell.
Step 302: the core network may generate the paging assistance information according to the received paging recommendation information.
Fig. 4 is a flowchart illustrating a third method for supporting paging optimization according to the present invention, which includes the following steps:
step 401: and the MME generates paging auxiliary information and sends the paging auxiliary information to a corresponding base station.
Optionally, the MME may pass through the paging recommendation information as the paging assistance information to the corresponding base station.
Optionally, the paging assistance information includes a paging area. The paging area includes a group of paging cells, and the cell information of the paging cells is the same as the cell information in step 201, which is not described herein again.
Optionally, the paging assistance information further includes at least one of the following: the coverage grade history change information of the UE, the coverage grade information of the UE, the repeated paging times of the UE and the capability of the UE for listening to the repeated paging. The coverage level history change information and the coverage level information of the UE are as described in step 201, and are not described herein again.
Optionally, the MME generates paging assistance information according to the paging recommendation information sent by the first base station in step 301. In some embodiments, the paging recommendation information sent by the first base station includes a cell or a base station that does not support the UE location area. The UE location area refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
In some embodiments, the MME may screen out recommended cells supporting the UE location area as paging areas, and send the paging areas to the base stations supporting the recommended cells or all base stations within the UE location area;
in other embodiments, the MME does not perform screening, and passes the cell recommended by the first base station to the base station supporting the recommended cell or all base stations within the UE location area, and then the base station screens the paging area.
When the MME sends the paging area to the base station, the MME may send only the paging area supported by the base station or send all the paging areas, and then the base station screens out the cells supported by the base station.
Optionally, the MME may decide the paging area according to the rate of the UE. Such as: when the UE is stationary, the UE may be paged only the last camped cell before the connection release.
Optionally, the MME may determine the paging area according to the location of the last camped cell before the UE releases. Such as: when the UE is in the cell center and the UE is relatively stationary, the UE may only page the cell that the UE last resided before connection release, and when the UE is in the cell edge and is relatively stationary, the UE may reselect to camp to another cell, for example, a neighboring cell of the cell that the UE last resided, and at this time, the paging area may be the cell where the UE last resided and its neighboring cell.
Optionally, the MME may further determine, according to the history change information of the coverage level of the UE, a coverage enhancement level of the UE of the base station, a coverage state level of the UE, or the number of times of repeated paging of the UE.
Optionally, the MME may determine that the UE is a stationary UE according to subscription information of the UE.
Step 402: the base station determines a cell to transmit a paging message according to the paging assistance information received from the MME.
If the paging auxiliary information includes a paging area, the base station may determine a cell to transmit a paging message according to the paging area. A paging area is a group of cells. Optionally, the base station may ignore the location area list in the paging message, and select a cell supported by the base station from a group of cells provided by the MME to send the paging message. In some embodiments, the base station receiving the paging area sent by the MME is a home base station gateway, and the home base station gateway forwards the received paging area to the home base station supporting the paging area or the home base station gateway directly transfers the paging area to all home base stations managed by the home base station, and the home base station completes the above screening. Optionally, the base station filters cells in the cell list to send the paging message, where the filtered cells are cells supported by the eNB and the selected cells support location areas in the location area list. In some embodiments, the base station receiving the paging area sent by the MME is a femto gateway, and the femto gateway forwards the received paging area to all femtocells supporting the femto of the paging area or all femtocells managed by the femto gateway, and the femto gateway or the femtocells perform the above screening.
If the paging assistance information includes coverage class information of the UE (including coverage enhancement class or coverage status class of the UE, as described above), the base station may determine a paging mode, such as whether to use repeated paging and the number of times of repeated paging, according to the coverage class information of the UE. Such as: when the coverage state of the UE is good, the UE may not need coverage enhancement, that is: repeated paging is not required; when the coverage state of the UE is poor, the corresponding coverage enhancement level is high, and the number of times of repeated paging is required is large.
If the paging auxiliary information includes history change information of the coverage level of the UE or history change information of the coverage level of the UE in the last resident cell, the base station may select the coverage enhancement level or the coverage status level of the UE with the highest probability according to the obtained history change information of the coverage level of the UE to determine the most appropriate number of times of paging repetition.
If the paging assistance information contains the repeated paging times of the UE, the base station can initiate the paging of the UE according to the indicated repeated times.
If the paging auxiliary information contains the capability of the UE to listen to the repeated paging, the base station does not initiate the repeated paging to the UE without the capability.
Fig. 5 is a flowchart illustrating a fourth method for supporting paging optimization according to the present invention, which includes the following steps:
step 501: the first base station receives location area information of the UE from the UE, the second base station, or the core network. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Step 502: the first base station may filter the paging recommendation information according to the location area information of the UE, and send the paging recommendation information to the core network.
In some embodiments, the base station sends only cell information of a recommended cell supporting the UE location area to the MME, i.e., the paging recommendation information does not include a cell or a base station not supporting the UE location area.
In other embodiments, the base station does not filter the recommended cell information according to the UE location area, but sends the cell information of all recommended cells to the MME.
In the methods shown in fig. 2 to 5 of the present invention, related to coverage level information of a UE, in order to implement delivery of the coverage level information of the UE, the present invention provides a corresponding method, which includes: the UE initially accesses the network, and after the UE establishes connection with the network or when the coverage grade information of the UE is changed, the UE or the base station reports the latest coverage grade information and the historical change information of the coverage grade of the UE to the core network. The history change information of the coverage level of the UE or the coverage level information of the UE is described in step 201, and is not described herein again. Optionally, the UE or the base station may also report the identifier of the cell and/or the identifier of the base station where the UE is currently located to the core network.
The technical solution of the present application is further described in detail by several preferred embodiments with reference to the accompanying drawings.
Fig. 6 is a schematic diagram of a first embodiment of a method for supporting paging optimization according to the present invention, which includes the following steps:
step 601: and the MME sends an E-RAB release request or UE context release request message to the base station to request to release the UE connection.
Step 602: and the base station sends an E-RAB release response or UE context release response message to the core network.
Optionally, the message includes paging recommendation information. The content, generation and transmission of the paging recommendation information are as described in step 301, and are not described herein.
Optionally, the message includes history change information of the coverage level of the UE in the base station or history change information of the coverage level of the UE, and the description of the history change information of the coverage level of the UE is as described in step 201, which is not described herein again.
Fig. 7 is a schematic diagram of a second embodiment of a method for supporting paging optimization according to the present invention, where the second embodiment is paging initiation, and the method includes the following steps:
step 701: and the MME sends a paging message to the base station, wherein the message contains paging auxiliary information. The content, generation and transmission of the paging assistance information are as described in step 401, and are not described herein again.
Fig. 8 is a schematic diagram of a third embodiment of a method for supporting paging optimization according to the present invention, where the third embodiment is an inter-eNB handover, and the method includes the following steps:
step 801: the first base station receives a handover request of the second base station.
Optionally, the message includes UE history access information. The UE history access information is as described in step 201, and is not described herein again. In some embodiments, when the second base station generates the UE historical access information, a cell or a base station of the historical access information may be screened according to the location area information of the UE, and only information of a cell or a base station supporting the location area information of the UE is sent to the first base station. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Optionally, the message includes history change information of the coverage level of the UE in the second base station or history change information of the coverage level of the UE, and the history change information of the coverage level of the UE is as described in step 201, and is not described herein again.
Optionally, the message includes location area information of the UE. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Step 802: the first base station sends a handover request acknowledgement to the second base station.
Step 803: the first base station sends a path update request to the MME.
Step 804: and the first base station receives a path updating request confirmation sent by the MME.
Optionally, the message includes location area information of the UE, and may be a location area or a location area list.
If the location area information of the UE has been received in step 801, the first base station transmits according to the MME
And updating the location area information of the UE.
Optionally, the message includes UE history access information. The UE history access information is as described in step 201, and is not described herein again. In some embodiments, the MME may screen cells or base stations in the historical access information according to the latest UE location area information after handover, and only information of cells or base stations that support the location area information of the UE is sent to the first base station. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides. And the first base station updates according to the UE historical access information sent by the MME.
When the UE is switched to the third base station next, and the first base station sends the historical access information of the UE to the third base station, the cell or the base station in the historical access information of the UE supporting the location area of the UE may be screened according to the location area information of the UE, and only the information of the cell or the base station supporting the location area to which the UE belongs is sent to the third base station.
Fig. 9 is a schematic diagram of a fourth embodiment of the method for supporting paging optimization according to the present invention, where the fourth embodiment is a process of performing handover between enbs through an MME, and the method includes the following steps:
step 901: and the MME receives the switching requirement of the second base station.
Optionally, the message includes UE history access information. The UE history access information is as described in step 201, and is not described herein again. In some embodiments, when the second base station generates the UE historical access information, a cell or a base station in the historical access information may be screened according to the location area information of the UE, and only information of a cell or a base station that supports the location area information of the UE is sent to the MME. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Optionally, the message includes history change information of the coverage level of the UE in the second base station or history change information of the coverage level of the UE, and the history change information of the coverage level of the UE is described in step 201 and is not described herein again.
Optionally, the message includes location area information of the UE. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Step 902: the MME sends a switching request message to the first base station.
Optionally, the message includes UE history access information. The UE history access information is as described in step 201, and is not described herein again. In some embodiments, the MME may filter the cells or base stations in the historical access information according to the latest location area information of the UE, and only information of cells or base stations supporting the location area information of the UE is transmitted to the first base station. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Optionally, the message includes location area information of the UE. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides. In some embodiments, if the handover required message already contains the location area information of the UE, the MME may update the content in the message according to the location area information of the UE context.
Step 903: the first base station sends a handover request acknowledgement to the MME.
Step 904: the MME sends a handover command to the second base station.
Fig. 10 is a schematic diagram of a fifth embodiment of the method for supporting paging optimization according to the present invention, where the embodiment is a process of inter-MME handover, and the method includes the following steps:
step 1001: and the second MME receives the switching requirement of the second base station.
Optionally, the message includes UE history access information. The UE history access information is as described in step 201, and is not described herein again. In some embodiments, when the second base station generates the UE historical access information, a cell or a base station in the historical access information may be screened according to the location area information of the UE, and only information of a cell or a base station that supports the location area information of the UE is sent to the second MME. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Optionally, the message includes history change information of the coverage level of the UE in the second base station or history change information of the coverage level of the UE, and the history change information of the coverage level of the UE is as described in step 201, and is not described herein again.
Optionally, the message includes location area information of the UE. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Step 1002: the second MME sends a forwarding relocation request to the first MME.
Step 1003: the first MME sends a switching request message to the first base station.
Optionally, the message includes UE history access information. The UE history access information is as described in step 201, and is not described herein again. In some embodiments, the first MME may filter the cells or base stations in the historical access information according to the latest location area information of the UE, and only information of cells or base stations supporting the location area information of the UE is sent to the first base station. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Optionally, the message includes history change information of the coverage level of the UE in the second base station or history change information of the coverage level of the UE, and the history change information of the coverage level of the UE is as described in step 201, and is not described herein again.
Optionally, the message includes location area information of the UE. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides. In some embodiments, if the handover required message already contains the location area information of the UE, the first MME may update the location area content in the message according to the location area information of the UE context.
Step 1004: the first base station sends a handover request acknowledgement to the first MME.
Step 1005: the first MME sends a forwarding relocation response to the second MME.
Step 1006: the second MME sends a switching command to the second base station.
Fig. 11 is a schematic diagram of a sixth embodiment of the method for supporting paging optimization according to the present invention, where the method includes the following steps:
step 1101: and establishing RRC connection between the UE and the base station.
Step 1102: the base station sends an initial UE message to the MME.
Optionally, the initial UE message includes the latest coverage level information of the UE. The coverage level information is as described in step 201, and is not described herein again.
Step 1103: the MME sends an initial UE context establishment request message or a downlink NAS transmission message to the base station.
Optionally, the message includes UE history access information. The UE history access information is as described in step 201, and is not described herein again.
Optionally, the downlink NAS message may also occur in the process of the connected state.
Optionally, the message includes location area information of the UE. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Optionally, the message includes UE history access information. The UE history access information is as described in step 201, and is not described herein again. In some embodiments, the MME may screen the cells or base stations in the historical access information according to the latest location area information of the UE, and only the UE historical message information supporting the location area information of the UE is sent to the base station. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Fig. 12 is a diagram of a seventh embodiment of a method for supporting paging optimization according to the present invention, which is a process of interaction between a UE and a base station, and includes the following steps:
step 1201: the base station sends a UE information request message to the UE.
Step 1202: and the UE sends a UE information response message to the base station.
Optionally, the UE information response message includes UE history access information. The UE history access information is as described in step 201, and is not described herein again. In some embodiments, the UE may filter the cells or base stations in the historical access information according to the latest location area information of the UE, and only the information of the cells or base stations supporting the location area information of the UE is sent to the base station. The location area information of the UE refers to a location area in a location area list configured for the UE by the core network or a location area where the UE resides.
Fig. 13 is a schematic diagram of an eighth embodiment of the method for supporting paging optimization according to the present invention, which is a process of interacting UE reception repeat paging capability between a core network and a base station, and includes the following steps:
step 1301, the base station sends a UE capability information indication message to the MME. The message includes the capability of the UE to cover enhanced paging, i.e. the capability of listening to repeated paging.
Fig. 14 is a schematic diagram of a ninth embodiment of the method for supporting paging optimization according to the present invention, where the embodiment is a process of reporting changed coverage level information to a core network by a UE, and the method includes the following steps:
step 1401, when the UE initiates an attach, location area update request message or service request message to the core network, the above message includes the latest coverage level information of the UE. The coverage level information is as described in step 201, and is not described herein again. When the coverage level of the UE changes, the UE may trigger a location update request message to send the latest coverage level information of the UE to the core network.
Corresponding to the method, the application also provides corresponding equipment which is respectively described below.
Fig. 15 is a schematic structural diagram of a first preferred apparatus of the present invention, which includes: a first receiving module and a first sending module, wherein:
the first receiving module is used for receiving UE historical access information from the UE, the second base station or the core network;
and the first sending module is used for generating paging recommendation information according to the historical access information of the UE and sending the paging recommendation information to the core network.
Fig. 16 is a schematic structural diagram of a second preferred apparatus of the present invention, which includes: a second receiving module and a second sending module, wherein:
a second receiving module, configured to receive paging recommendation information from a base station;
and the second sending module is used for generating paging auxiliary information according to the received paging recommendation information and sending the paging auxiliary information to the corresponding base station.
Fig. 17 is a schematic structural diagram of a third preferred apparatus of the present invention, including: a third receiving module and a third sending module, wherein:
a third receiving module, configured to receive paging assistance information from a core network;
and a third sending module, configured to determine a cell to send a paging message according to the paging assistance information.
Fig. 18 is a schematic structural diagram of a fourth preferred apparatus of the present invention, including: a fourth receiving module and a fourth sending module, wherein:
a fourth receiving module, configured to receive location area information of the UE from the UE, the second base station, or the core network;
and the fourth sending module is used for generating paging recommendation information according to the location area information of the UE and sending the paging recommendation information to the core network.
According to the technical scheme, the invention helps the core network to determine the paging strategy through various information such as the historical access information of the UE, the location area information of the UE, the position of the UE in the cell, the speed of the UE and the like, thereby achieving the purposes of reducing the paging issuing of an S1 interface, reducing the paging range and reducing the paging resources. Especially for stationary or low-speed moving UE, the reduction range of the paging resource is obvious by adopting the invention.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (15)
1. A method performed by a base station in a wireless communication system, comprising:
a base station acquires historical information of User Equipment (UE);
the base station generates paging recommendation information according to the UE historical information and sends the paging recommendation information to a core network;
the UE history information comprises cell information of a cell visited by the UE.
2. The method of claim 1, wherein the base station obtains UE history information: the base station receives the UE history information from the UE, other base stations or a core network.
3. The method of claim 1, wherein:
the paging recommendation information contains at least one of the following information: recommending cell information of the cell, position information of a last resident cell before UE release, UE speed and historical change information of the UE coverage grade.
4. The method of claim 3, wherein:
the recommended cells include cells visited by the UE.
5. The method according to any one of claims 1 to 4, characterized in that:
the cell information includes at least one of the following information: the method comprises the steps of identifying a cell, identifying a base station to which the cell belongs, identifying a location area to which the cell belongs, identifying time for UE to enter the cell, time for UE to leave the cell, time for UE to be in the cell, identifying the adjacent area of the cell, identifying the base station to which the adjacent area of the cell belongs, and covering grade information of the UE in the cell.
6. The method of claim 5, wherein:
the coverage level information of the UE includes at least one of the following information: the coverage enhancement level of the UE, the time for the UE to enter the coverage enhancement level, the time for the UE to leave the coverage enhancement level, the time length of the UE in the coverage enhancement level, the coverage state level of the UE, the time for the UE to enter the coverage state level, the time for the UE to leave the coverage state level, and the time length of the UE in the coverage state level.
7. A base station apparatus, comprising: a first receiving module and a first sending module, wherein:
the first receiving module is used for acquiring historical information of User Equipment (UE);
the first sending module is used for generating paging recommendation information according to the UE historical information and sending the paging recommendation information to the core network;
the UE history information includes cell information of a cell visited by the UE.
8. A method performed by a core network in a wireless communication system, comprising:
the method comprises the steps that a core network receives paging recommendation information from a base station, wherein the paging recommendation information comprises cell information of a recommended cell, and the recommended cell comprises a cell visited by User Equipment (UE);
and the core network generates paging auxiliary information according to the received paging recommendation information and sends the paging auxiliary information to a corresponding base station.
9. The method of claim 8, wherein the cell information comprises at least one of the following information: the method comprises the steps of identifying a cell, identifying a base station to which the cell belongs, identifying a location area to which the cell belongs, identifying time for UE to enter the cell, time for UE to leave the cell, time for UE to be in the cell, identifying the adjacent area of the cell, identifying the base station to which the adjacent area of the cell belongs, and covering grade information of the UE in the cell.
10. The method of claim 8, wherein:
the paging assistance information includes at least one of: history change information of the coverage grade of the UE, the coverage enhancement grade of the UE, the coverage state grade of the UE, the repeated paging frequency of the UE and the capability of the UE for listening to the repeated paging; the history change information of the coverage level of the UE is information of a set of coverage levels that the UE sequentially passes through.
11. A core network device, comprising: a second receiving module and a second sending module, wherein:
a second receiving module, configured to receive paging recommendation information from a base station, where the paging recommendation information includes cell information of a recommended cell, and the recommended cell includes a cell visited by UE;
and the second sending module is used for generating paging auxiliary information according to the received paging recommendation information and sending the paging auxiliary information to the corresponding base station.
12. A method by a base station in a wireless communication system, comprising:
the base station receives paging auxiliary information from a core network;
the base station determines a cell for sending the paging message according to the paging auxiliary information; the paging auxiliary information includes cell information of a recommended cell, and the recommended cell includes a cell visited by the UE.
13. The method of claim 12, wherein:
the paging assistance information further includes at least one of the following:
a coverage enhancement level or a coverage status level of the UE;
historical change information of the coverage level of the UE;
the number of repeated paging of the UE;
the UE ability to listen to repeated pages.
14. The method of claim 13, wherein:
the coverage level information of the UE includes at least one of the following information: the coverage enhancement level of the UE, the time for the UE to enter the coverage enhancement level, the time for the UE to leave the coverage enhancement level, the time length of the UE in the coverage enhancement level, the coverage state level of the UE, the time for the UE to enter the coverage state level, the time for the UE to leave the coverage state level, and the time length of the UE in the coverage state level.
15. A base station apparatus, comprising: a third receiving module and a third sending module, wherein:
a third receiving module, configured to receive paging assistance information from a core network;
a third sending module, configured to determine a cell to send a paging message according to the paging assistance information;
the paging auxiliary information includes cell information of a recommended cell, and the recommended cell includes a cell visited by the UE.
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| WO2016186416A1 (en) | 2016-11-24 |
| CN106304336A (en) | 2017-01-04 |
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