CN106851750B - Communication method, base station and system - Google Patents
Communication method, base station and system Download PDFInfo
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- CN106851750B CN106851750B CN201510884676.6A CN201510884676A CN106851750B CN 106851750 B CN106851750 B CN 106851750B CN 201510884676 A CN201510884676 A CN 201510884676A CN 106851750 B CN106851750 B CN 106851750B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/22—Performing reselection for specific purposes for handling the traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
Abstract
The invention discloses a communication method, a base station and a system. The method is applied to a base station group, the base station group comprises a main base station and an auxiliary base station, the main base station and the auxiliary base station are connected through exchange equipment, the main base station stores context information of a user residing on the auxiliary base station, and the main base station receives a switching request message sent by the auxiliary base station; if the main base station judges that the target base station of the switched user equipment does not belong to the base station group where the main base station is located according to the switching request message, the main base station sends the switching request message to the target base station; and the main base station informs the user equipment on the auxiliary base station corresponding to the switching request message to switch to the target base station. The method, the base station and the system can reduce the processing load on the base station under the scene of small-range coverage of a plurality of base stations.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a communication method, a base station, and a system.
Background
With the development of mobile communication networks, in order to adapt to the rapid increase of global mobile data traffic, more effectively realize uniform coverage of network capacity and eliminate network blind spots caused by single macro coverage, a network networking structure gradually changes from macro cells to small cell structures with high capacity, low cost, environmental protection and energy saving, and Smallcell integrated with cellular technology is introduced to supplement coverage aiming at the requirement.
Compared with the traditional Macrocell, the Small Cell can flexibly network, reduce hot spots, reduce the difficulty of acquiring indoor area sites and engineering construction, avoid the problem of high-frequency networking damage of an LTE network, expand the network coverage range and improve the network capacity, and can be widely applied to indoor and outdoor blind and heat supplementing scenes. After Small Cell is introduced, each HeNB (Home evolved Node B) is connected with a core network through a gateway, and meanwhile, the adjacent Cell relation among the henbs and the adjacent Cell relation between the henbs and the macro base station are connected through X2 link configuration.
However, since the coverage area of the HeNB is small relative to the macro base station, in an actual networking environment, a situation in which a plurality of henbs are installed simultaneously in one coverage area may occur. Especially in indoor public places with large space, such as gymnasiums, hospitals, schools and the like, the situation that multiple users are switched simultaneously or users are frequently switched between two HeNBs can occur, the signaling processing load of a base station is increased, the switching scenes covered by a wireless network are increased, the risk of user switching failure is increased, the call drop rate is improved, and further the user perception is reduced.
Therefore, it is urgent to research and solve the problem that the processing load on the base station is increased due to frequent handover of the user and the handover failure rate of the user is increased in the scenario of small coverage of multiple base stations.
Disclosure of Invention
The embodiment of the invention provides a communication method, a base station and a system, which are used for solving the problem of increased processing load on the base station caused by frequent switching of users in a scene covered by a plurality of base stations in a small range.
A communication method provided in an embodiment of the present invention is applied to a base station group, where the base station group includes a primary base station and a secondary base station, the primary base station and the secondary base station are connected through a switching device, and context information of a user residing on the secondary base station is stored on the primary base station, and the method includes:
the main base station receives a switching request message sent by the auxiliary base station;
if the main base station judges that the target base station of the switched user equipment does not belong to the base station group where the main base station is located according to the switching request message, the main base station sends the switching request message to the target base station;
and the main base station informs the user equipment on the auxiliary base station corresponding to the switching request message to be switched to the target base station.
Specifically, if the master base station determines that the target base station of the switched user equipment is an auxiliary base station in another base station group according to the switching request message, the master base station sends the switching request message to the master base station in the base station group where the target base station is located, and the switching request message is forwarded to the target base station by the master base station in the base station group where the target base station is located.
An embodiment of the present invention provides a communication method further including: and if the main base station judges that the target base station of the switched user equipment is the auxiliary base station in the base station group where the main base station is located according to the switching request message, the main base station transparently transmits the switching request message.
An embodiment of the present invention provides a communication method further including: the main base station receives a non-access stratum (NAS) signaling sent by an auxiliary base station after user equipment establishes connection with the auxiliary base station, and context information of the user contained in the NAS signaling is obtained; and the main base station stores the context information of the user and transparently transmits the NAS signaling to a core network.
An embodiment of the present invention provides a communication method further including: and the main base station receives a release notice sent by the auxiliary base station after the user equipment on the auxiliary base station is successfully switched to the target base station outside the base station group, and releases the context information of the user stored on the main base station according to the release notice.
An embodiment of the present invention provides a communication method further including: and the main base station receives an update notification sent by an auxiliary base station after user equipment on the auxiliary base station is successfully switched to a target auxiliary base station in the base station group, and updates the context information of the user stored on the main base station according to the update notification.
An embodiment of the present invention provides a communication method further including: the main base station receives downlink data sent by a core network to user equipment on the auxiliary base station; and the main base station sends the downlink data to an auxiliary base station where user equipment corresponding to the downlink data is located according to the context information of the user residing on the auxiliary base station and stored in the main base station, and the auxiliary base station sends the downlink data to the user equipment.
A base station provided in an embodiment of the present invention is applied to a base station group, where the base station group includes a primary base station and a secondary base station, the primary base station and the secondary base station are connected through a switching device, and the primary base station stores context information of a user residing on the secondary base station, and includes:
a receiving module, configured to receive a handover request message sent by a secondary base station when the base station is configured as a primary base station;
a sending module, configured to send the handover request message to the target base station when the base station is configured as a master base station and when it is determined that the target base station of the user equipment to be handed over does not belong to the base station group where the master base station is located according to the handover request message;
and a notification module, configured to notify the user equipment on the secondary base station corresponding to the handover request message to be handed over to the target base station when the base station is configured as a primary base station.
Wherein the sending module, when the base station is configured as a master base station, is specifically configured to: and when the target base station of the switched user equipment is judged to be an auxiliary base station in another base station group according to the switching request message, sending the switching request message to a main base station in the base station group where the target base station is located, wherein the switching request message is forwarded to the target base station by the main base station in the base station group where the target base station is located.
An embodiment of the present invention provides a base station, when the base station is configured as a master base station, further including:
and the transparent transmission module is used for transmitting the switching request message through the main base station when the target base station of the switched user equipment is judged to be the auxiliary base station in the base station group where the main base station is located according to the switching request message.
An embodiment of the present invention provides a base station, when the base station is configured as a master base station, further including:
a storage module, configured to receive a non-access stratum NAS signaling sent by an auxiliary base station after a user equipment establishes a connection with the auxiliary base station, and acquire context information of the user included in the NAS signaling; and the NAS signaling is used for storing the context information of the user and transparently transmitting the NAS signaling to a core network.
An embodiment of the present invention provides a base station, where the base station is configured as a master base station, the storage module is further configured to: and receiving a release notice sent by an auxiliary base station after the user equipment on the auxiliary base station is successfully switched to a target base station outside the base station group, and releasing the context information of the user stored on the main base station according to the release notice.
An embodiment of the present invention provides a base station, where the base station is configured as a master base station, the storage module is further configured to: receiving an update notification sent by an auxiliary base station after user equipment on the auxiliary base station is successfully switched to a target auxiliary base station in the base station group, and updating the context information of the user stored on the main base station according to the update notification.
An embodiment of the present invention provides a base station, when the base station is configured as a master base station, further including: and the data module is used for receiving downlink data sent by a core network to the user equipment on the auxiliary base station, and sending the downlink data to the user equipment corresponding to the downlink data according to the context information of the user residing on the auxiliary base station and stored on the main base station.
A system provided by an embodiment of the present invention is applied to a base station group, where the base station group includes a primary base station and a secondary base station, the primary base station and the secondary base station are connected through a switching device, and context information of a user residing on the secondary base station is stored on the primary base station, and the system includes:
the main base station is used for receiving a switching request message sent by the auxiliary base station; if the target base station of the switched user equipment is judged not to belong to the base station group where the main base station is located according to the switching request message, whether the target base station is an auxiliary base station in another base station group is judged according to the switching request message; if so, sending the switching request message to a main base station in a base station group where the target base station is located, wherein the switching request message is forwarded to the target base station by the main base station in the base station group where the target base station is located, otherwise, sending the switching request message to the target base station; informing the user equipment on the auxiliary base station corresponding to the switching request message to switch to the target base station;
the auxiliary base station is used for sending a switching request message to the main base station, wherein the switching request message comprises target base station information switched by the user equipment on the auxiliary base station; and the base station is also used for receiving a switching notification sent by the main base station and transmitting the notification to the user equipment on the auxiliary base station when the user equipment on the auxiliary base station is switched to a target base station outside the base station group.
And the switching equipment is used for connecting the main base station and the auxiliary base station and forwarding the received message from the main base station or the auxiliary base station according to the pre-configured corresponding relation of the forwarding ports.
It can be seen that in the above-mentioned embodiment of the present invention, the primary base station and the secondary base station are connected through the switching device, where the primary base station stores the context information of the user residing on the secondary base station, and for the user equipment on the secondary base station in the base station group, when needing to perform a handover, the primary base station receives the handover request message sent by the secondary base station, and when the user equipment on the secondary base station in the base station group needs to perform a handover to the target base station outside the base station group, the handover request message is sent by the primary base station to the target base station outside the base station group, and the primary base station receives the handover notification returned by the target base station, that is, each secondary base station only needs to process the signaling flow when the user equipment on each secondary base station switches in the base station group, and the signaling flow when the user equipment on each secondary base station switches outside the base station group is processed by the primary base station, so as to reduce the problem of increased processing signaling load on the secondary base station caused by the user switching on each secondary base station in the, the problem of base station processing load increase caused by frequent switching of users in a scene with small coverage of a plurality of base stations is solved, user switching failure rate in the scene can be reduced, and network performance and user perception are improved on the basis of meeting network coverage and capacity.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a basic network architecture of a current LTE network;
FIG. 2 is an optimized network architecture to which embodiments of the present invention are applicable;
fig. 3 is a flowchart illustrating a communication method according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a specific application of a communication method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Currently, a network architecture of an LTE network after introducing an HeNB may be specifically as shown in fig. 1. The cell coverage of the HeNB is small, and the HeNB can be generally configured as a single HeNB or a local HeNB cluster, and is configured according to an application scenario during specific application, for example, in a typical home living application scenario, a single HeNB is configured, that is, a Closed Subscriber Group (CSG), in a campus or a large living scenario, the HeNB cluster is configured, that is, the HeNB cluster of the CSG, and in some public place scenarios, a single open-access HeNB is configured.
As shown in fig. 1, one network architecture of current LTE networks may include: part of HeNBs are directly connected with core network nodes MME/S-GW (Mobility Management Entity/Serving GateWay) through an S1 interface, so that the number of interface signaling interaction and the processing load of the MME/S-GW are reduced, frequent switching of UE in the moving process is avoided, and the networking structure is generally suitable for the environment with less HeNB nodes deployed in the initial stage of the network; under the condition that the deployment of HeNB nodes is increased, a HeNB Gateway (HeNB Gateway) is usually introduced to converge and forward signaling and data between the HeNB and a core network node MME/S-GW, a control plane of an S1 interface is controlled in a centralized manner or a control plane and a user plane of an S1 interface can be controlled in a centralized manner, so that the processing load on the core network MME/S-GW due to the fact that a large number of HeNBs are accessed and increased is reduced, under the networking structure, the HeNB is connected with the HeNB GW through an S1 interface, and the HeNB GW is connected with the core network node MME/S-GW through an S1 interface; the eNB is connected with a core network node MME/S-GW through an S1 interface; the HeNB is connected with the HeNB and the HeNB is connected with the eNB through an X2 interface; in addition, when the HeNB supports the LIPA (Local IP Access) function, an S5 interface between the HeNB and the MME/S-GW is supported.
According to the networking structure of fig. 1, it can be seen that, because the coverage area of the HeNB is small, in an actual networking environment, a situation that a plurality of henbs are installed in one coverage area may occur. Especially for indoor public places with relatively large space, such as places of gymnasiums, hospitals, schools and the like, because each HeNB can execute the service access and release process of the user to the user in the coverage cell, the situation that a plurality of users are switched simultaneously or the users are frequently switched between two HeNB coverage cells may occur, which increases the signaling processing load of each HeNB, further increases the user switching failure rate and reduces the user perception.
Aiming at the characteristics of a networking structure with a small coverage range of a plurality of base stations in fig. 1, the embodiment of the invention provides a communication method, a base station and a system, which are used for reducing the problems of increased processing load on the base station, reduced network performance caused by frequent switching of service data, increased user switching failure rate and reduced user perception caused by frequent switching of users in the network structure.
Based on the LTE network architecture shown in fig. 1, the network architecture provided in the embodiment of the present invention can implement a communication method, a base station, and a system provided in the embodiment of the present invention. Fig. 2 exemplarily shows a schematic diagram of an optimized LTE network architecture to which the embodiment of the present invention is applicable, where the network architecture may include: UE201 (user equipment), HeNB202, switching device 203, base station group 204, HeNB GW 205, and MME/S-GW 206.
Under the network architecture shown in fig. 2, henbs 202 in a coverage area with multiple henbs 202 are grouped to obtain one or multiple base station groups 204, each base station group 204 may include one or multiple henbs 202, and when there are two or more henbs 202 in a base station group, the henbs 202 in the group may be configured as a primary HeNB202 and a secondary HeNB202, and a switching device 203 may be configured for each base station group 204.
The embodiment of the communication method provided by the embodiment of the present invention may be specifically applied to the base station group 204 shown in fig. 2, wherein the auxiliary henbs 202 may be connected to each other through an X2 interface; the HeNB202 in the base station group 204 includes a main HeNB202 and an auxiliary HeNB202, and the connections are respectively established with the switching device 203 through S1 interfaces; a main HeNB202 and a HeNB GW 205 in each base station group 204 establish connection through an S1 interface; the HeNB GW 205 and the MME/S-GW 206 are connected via an S1 interface, the UE201 is connected to the base station HeNB202 via a Uu interface, and the context information of the UE201 residing on the secondary base station HeNB202 is stored in the primary base station HeNB 202.
Specifically, for a communication method provided in the embodiments of the present invention applied in a network architecture with base station groups, in some embodiments, when a plurality of base stations are configured in groups in advance, each base station group may be distinguished by using a group identifier. For the base station group identified by a group identifier, all the secondary base stations and the primary base station in the base station group may be configured with their identifiers in the base station group, for example, the identifier of the primary base station in the base station group may directly use the group identifier of the base station. For example, taking a digital identifier group identifier and a base station identifier as an example, when performing grouping configuration, configuring a group identifier 1 for a base station group, where the identifier of a main base station corresponding to the base station group is 1, the base station group has n auxiliary base stations, and the identifiers of the auxiliary base stations are 1-1, 1-2, … … 1-n, respectively; and configuring a group identifier 2 for another base station group, wherein the identifier of the main base station corresponding to the base station group is 2, the base station group is provided with m auxiliary base stations, and the identifier of each auxiliary base station is 2-1 and 2-2 respectively. … … 2-m, and the like.
It should be noted that in the embodiment of the present invention, the base station 202 may be an evolved Node B (eNB or e-NodeB) in an LTE system or an LAA-LTE system, a macro base station, a micro base station (also referred to as a "small base station"), a home base station (HeNB), a pico base station, an Access Point (AP) or a Transmission Point (TP), and the like, which is not limited in this respect.
It should be noted that in the embodiment of the present invention, the switching device 203 may be a switch, a router, or the like, and the present invention is not limited thereto.
It should be noted that in the embodiment of the present invention, "user equipment" may also be understood as "UE", "terminal", "user", and the like, where the above expressions all indicate users that need to acquire service and data transmission with respect to a base station and a core network. The User Equipment may be a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem with a wireless communication function, and various forms of User Equipment (UE), a Mobile Station (MS), a Terminal (Terminal), a Terminal device (Terminal Equipment), and the like, which are not limited in this respect.
Specifically, when actually performing grouping and configuration, the henbs in the coverage range with the multiple henbs may be grouped according to the coverage relationship of the henbs in the coverage range, and the henbs in the group may also be configured as the primary HeNB and the secondary HeNB according to the coverage relationship of the henbs, or the henbs in the group may also be configured according to the capacity of each HeNB in the group, for example, a large capacity is selected as the primary HeNB, and the henbs in the group may also be configured by comprehensively considering the above factors. Generally, one HeNB in a base station group can be selected to be configured as a primary HeNB, and other henbs can be configured as secondary henbs.
Based on the network architecture shown in fig. 2, a communication method provided by the embodiment of the present invention may be applied to the base station group shown in fig. 2, where the base station group includes a primary base station and a secondary base station, and the primary base station and the secondary base station are connected through a switching device, where context information of a user residing on the secondary base station is stored on the primary base station.
Specifically, a master base station in a base station group may obtain context information of a user included in a non-access stratum NAS signaling sent by a secondary base station after the user establishes a connection with the secondary base station by receiving the NAS signaling; and storing the context information of the user, and transparently transmitting the NAS signaling to a core network, so that the context information of the user residing on the auxiliary base station is stored on the main base station. Wherein the NAS signaling may be a user reconfiguration signaling message.
In some embodiments, the secondary base station may also report the context information of the user residing on the secondary base station to the main base station actively, and the main base station stores the context information after receiving the information actively reported by the secondary base station, so that the main base station stores the context information of the user residing on the secondary base station.
For example, in a specific implementation scenario, after the base station group division and the configuration of the main base station and the secondary base station are completed, the main base station may establish a connection with the switch through an S1 interface, and meanwhile, the secondary base station also establishes a connection with the switch through an S1 interface, when a user accesses the secondary base station, the secondary base station may send a non-access stratum NAS signaling to the main base station through the switch through an S1 interface after the RRC connection is successfully established with the user, and the main base station forwards the non-access stratum NAS signaling to the core network, and when the main base station forwards the non-access stratum NAS signaling, the main base station first obtains and stores the context information of the user included in the non-access stratum signaling, and then transparently transmits the NAS signaling to the core network, so that the context information of the user residing on the secondary base station is stored on the main base station;
if the base station group changes, for example, a new auxiliary base station is added, the newly added auxiliary base station may first establish a connection with the switch through an S1 interface, and actively report the context information of the user residing on the current auxiliary base station to the main base station, so that the main base station stores the context information of the user residing on the auxiliary base station;
if the base station group changes, for example, a new master base station is configured, the new master base station may first establish a connection with the switch through the S1 interface, and notify all secondary base stations connected to the switch through the switch to actively report the context information of the user residing on the secondary base station, so that the new master base station stores the context information of the user residing on the secondary base station.
The following describes an embodiment of the present invention in detail based on a network architecture shown in fig. 2 with reference to the accompanying drawings.
Fig. 3 is a flowchart illustrating a communication method according to an embodiment of the present invention, where the method may be implemented by a master base station in a base station group, where the master base station stores context information of a user residing on a secondary base station. The process may include the steps of:
step 301: the main base station receives the switching request message sent by the auxiliary base station.
Specifically, the Handover Request message (Handover Request) is a Handover Request message generated after a secondary base station performs Measurement configuration on the UE within its coverage area, and after receiving a Measurement Report (Measurement Report) reported by the UE, refers to a Measurement Report result of the UE, and performs Handover decision according to its own Handover algorithm. The secondary base station sends the switching request message to the switching equipment through an interface S1, and the switching request message is forwarded to the primary base station by the switching equipment through an S1 connection established with the primary base station. Wherein, the measurement configuration sent by the secondary base station to the UE is issued by signaling RRC ConnectionReconfiguration message to require the UE configuration.
Specifically, the handover request message includes related information for handover preparation, such AS X2 and S1 signaling context reference of the UE, target cell identity, key KeNode B, RRC context, AS configuration, E-UTRAN Radio Access Bearer (E-UTRAN Radio Access Bearer) context, and the like. And simultaneously, the method also comprises a source cell physical layer identifier and a message authentication verification code, and is used for a recovery process after possible switching failure. For a communication method provided by the embodiments of the present invention applied in a network architecture having one or more base station groups, since there may be a handover between base stations in different base station groups, specifically, the handover request message includes related information for handover preparation, which should be able to indicate a group identifier corresponding to a target base station corresponding to the handover request message, for example, a cell identifier of the target base station in the handover request message includes group identifier information corresponding to a base station group in which the target base station is located, so as to identify whether the target base station is another secondary base station in the base station group, or is a primary base station in another base station group, or is a secondary base station in another base station group, or is an independent base station not belonging to any base station group. The group identifier of the base station may be a group identifier configured for each base station group to distinguish different base station groups when a plurality of base stations are configured in advance in a grouped manner, and identifiers of all the auxiliary base stations and the main base station in the base station group both include the group identifier information.
Specifically, the related information for handover preparation included in the handover request message should also be able to indicate a group identifier corresponding to the source secondary base station corresponding to the handover request message, or a primary base station identifier in the base station group where the source secondary base station is located corresponding to the handover request message, and a source secondary base station identifier corresponding to the handover request message, for example, for a target base station cell identifier in the handover request message includes primary base station identifier information and source secondary base station identifier information in the base station group where the source secondary base station is located, so as to assist the target base station to find a base station group where the source base station is located and a position of the source base station in the base station group, and complete a handover procedure.
For example, when grouping configuration is performed in advance, a base station group is configured with a group identifier 1, a main base station identifier corresponding to the base station group is 1, the base station group has n secondary base stations, and each secondary base station identifier is 1-1, 1-2, … … 1-n; and configuring a group identifier 2 for another base station group, wherein the main base station identifier corresponding to the base station group is 2, the base station group is provided with m auxiliary base stations, and each auxiliary base station identifier is 2-1 and 2-2 respectively. … … 2-m; and for the case where an independent base station not belonging to any base station group is configured with group identity 0:
when the UE on the auxiliary base station 1-1 in the base station group 1 with the group identifier 1 needs to be switched, the handover request message generated on the auxiliary base station 1-1 may include the identifier 1-1 of the source auxiliary base station, and the identifier 1-1 of the source auxiliary base station indicates the group identifier 1 of the base station group where the source auxiliary base station is located at the same time: when needing to switch to another auxiliary base station 1-3 in the base station group 1, the switching request message may further include an identifier 1-3 of the target auxiliary base station, indicating that the target auxiliary base station is an auxiliary base station in the same base station group as the auxiliary base station 1-1; when needing to switch to an auxiliary base station 2-1 in a base station group 2 with a group identifier of 2, the switching request message can also contain the identifier 2-1 of the target auxiliary base station, and the identifier 2-1 of the target auxiliary base station indicates the group identifier 2 of the base station group where the target auxiliary base station is located; when it is necessary to switch to the independent base station with the group identifier of 0, the handover request message may further include the identifier of 0 of the target base station, indicating that the base station is an independent base station outside the base station group 1.
Step 302: if the main base station judges that the target base station of the switched user equipment does not belong to the base station group where the main base station is located according to the switching request message, the main base station sends the switching request message to the target base station.
Specifically, step 302 may include: the main base station firstly judges whether a target base station of the switched user equipment is a certain auxiliary base station in a base station group where the main base station is located according to the received switching request message, and if the target base station is one auxiliary base station in the base station group where the main base station is located, the main base station transmits the switching request message in a transparent mode.
Specifically, step 302 may include: if the main base station judges that the target base station of the switched user equipment does not belong to the base station group where the main base station is located according to the switching request message, the main base station judges whether the target base station is an auxiliary base station in another base station group according to the switching request message.
If the main base station judges that the target base station is an auxiliary base station in another base station group, the main base station sends the switching request message to the main base station in the base station group where the target base station is located, the switching request message is forwarded to the target base station by the main base station in the base station group where the target base station is located, and otherwise, the main base station sends the switching request message to the target base station.
The main base station analyzes the received switching request message, and if the target base station corresponding to the switching request message is analyzed to be an auxiliary base station in the base station group where the main base station is located, the main base station transparently transmits the switching request message. In some embodiments, the cell identification information of all the secondary base stations in the base station group where the primary base station is located may be configured in advance on the primary base station, after receiving the handover request message, analyzes the cell identification information of the target base station corresponding to the handover request message, and determines whether the target base station is one of the secondary base stations in the base station group where the primary base station is located by querying the cell identification information of all the secondary base stations configured in advance.
Specifically, when the target base station is an auxiliary base station in the base station group, the main base station transparently transmits the handover request message, and the handover request message may be directly sent from the source auxiliary base station corresponding to the handover request message to the target auxiliary base station in the base station group through an X2 interface.
If the target base station corresponding to the handover request message is analyzed not to belong to the base station group where the main base station is located, that is, the target base station of the UE corresponding to the handover request message is not any auxiliary base station in the base station group where the main base station is located, the main base station continues to determine whether the target base station is an auxiliary base station in another base station group according to the handover request message.
If the main base station judges that the target base station is the auxiliary base station in another base station group, the main base station sends the switching request message to the main base station in the base station group where the target base station is located, and the switching request message is forwarded to the target base station by the main base station in the base station group where the target base station is located.
And if the main base station judges that the target base station is out of the group where the main base station is located and does not belong to any base station group, the main base station sends the switching request message to the target base station.
Step 303: and the main base station informs the user equipment on the auxiliary base station corresponding to the switching request message to be switched to the target base station.
Specifically, for a base station outside the base station group as the target base station, after the target base station receives the handover request message and completes resource reservation, a handover request response may be returned to the master base station in the base station group where the source base station is located, and the response may trigger the UE corresponding to the handover request message to perform handover. After receiving the switching request response, the primary base station may notify the UE of switching according to context information of a user corresponding to the switching request response stored in the primary base station, and the primary base station may transmit the switching request response to the secondary base station where the user is currently located through the switch, and the secondary base station further transmits the switching request response to the UE, so that the UE initiates a switching process using information in the switching request response, detaches from the source base station, and performs synchronization with the target base station.
Specifically, for a base station outside the base station group as the target base station, after the RRC connection is established between the UE and the target base station, the target base station may send a context release message of the UE to the master base station in the base station group where the source base station is located, notify the success of the source base station handover, trigger the master base station in the base station group where the source base station is located to release the context information of the user, and the master base station simultaneously forwards the message to the source base station, so that the source base station releases the radio bearer corresponding to the UE and the control plane resource related to the user context.
Preferably, for the target base station being an auxiliary base station in the base station group, after the UE establishes the RRC connection with the target base station, the method may further include: and the main base station receives a release notice sent by the auxiliary base station after the UE on the auxiliary base station is successfully switched to a target base station outside the base station group, and releases the context information of the user stored on the main base station according to the release notice.
The release notification may include UE id, primary base station id and secondary base station id information.
Further, if the target base station is an auxiliary base station in the base station group, after the UE establishes the RRC connection with the target base station, the method may further include: and the main base station receives an update notification sent by the auxiliary base station after the UE on the auxiliary base station is successfully switched to the target auxiliary base station in the base station group, and updates the context information of the user stored on the main base station according to the update notification.
The update notification may include the target secondary base station cell id, the source secondary base station cell id, and the UE id information of the base station group.
As for the network architecture shown in fig. 2 and the base station group that can apply the process of the communication method provided by the embodiment of the present invention shown in fig. 3 under the network architecture, where the base station group includes a main base station and a secondary base station, the main base station and the secondary base station are connected through a switching device, and the main base station stores context information of a user residing on the secondary base station, where a data service process between a core network and a base station in the base station group may specifically be the following process:
the main base station receives downlink data sent by a core network to user equipment on the auxiliary base station;
and the main base station sends the downlink data to the user equipment corresponding to the downlink data according to the context information of the user residing on the auxiliary base station and stored in the main base station.
To more clearly understand the application of the communication method provided by the embodiment of the present invention in a specific actual scenario, based on the network architecture shown in fig. 2, for the flow shown in fig. 3, taking an example that a UE residing on an auxiliary base station in a base station group needs to be switched, fig. 4 specifically shows some scenarios that the UE may need to be switched, such as a handover scenario that needs to be switched to an intra-group in the base station group, a handover scenario that needs to be switched to an independent base station outside the base station group, and an inter-group handover scenario that needs to be switched to a base station group outside the base station group.
As can be seen from the above description, the communication method provided by the embodiment of the present invention may be applied to a base station group, where the base station group includes a primary base station and a secondary base station, the primary base station and the secondary base station are connected through a switching device, and the primary base station stores context information of a user residing on the secondary base station. The main base station receives a switching request message sent by the auxiliary base station, judges whether a target base station of the switched user equipment belongs to a base station group where the main base station is located, and judges whether the target base station is an auxiliary base station in another base station group; if the master base station is the auxiliary base station in the other base station group, the master base station sends a switching request message to the master base station in the base station group where the target base station is located, the master base station in the base station group where the target base station is located forwards the switching request message to the target base station, and otherwise, the master base station sends the switching request message to the target base station; and the main base station informs the user equipment on the secondary base station corresponding to the switching request message to switch to the target base station. It can be seen that, in the embodiment of the present invention, base stations within a coverage area with multiple base stations are grouped, the base stations within a base station group are planned to be a primary base station and a secondary base station, and the primary base station and the secondary base station establish a communication link through a switching device, thereby optimizing an existing LTE network architecture, and under the optimized LTE network architecture configured with the base station group, for a UE residing on a secondary base station within a base station group, when it needs to switch a target base station outside the base station group, a switching request message is sent to the target base station outside the base station group by the primary base station, and a switching notification returned by the target base station is received by the primary base station, that is, a signaling flow when the UE on each secondary base station is switched to the outside of the base station group is processed by the primary base station, thereby reducing a processing signaling load on each secondary base station within the base station group, and solving a problem of increased base station processing load caused by frequent switching of users in a scenario with small coverage areas of multiple base stations, the user switching failure rate under the scene can be reduced, and the network performance and the user perception are improved on the basis of meeting the network coverage and capacity.
Based on the same technical concept, embodiments of the present invention further provide a base station, where the base station is applied to a base station group, the base station group includes a main base station and a secondary base station, the main base station and the secondary base station are connected through a switching device, and when the base station is configured as the main base station, context information of a user residing on the secondary base station is stored on the base station, and the base station may perform the above method embodiments. The base station provided by the embodiment of the invention is shown in fig. 5.
A receiving module 501, configured to receive a handover request message sent by a secondary base station when the base station is configured as a primary base station;
a sending module 502, configured to send the handover request message to the target base station when it is determined, according to the handover request message, that the target base station of the user equipment to be handed over does not belong to the base station group where the master base station is located when the base station is configured as the master base station;
a notifying module 503, configured to notify the ue on the secondary base station corresponding to the handover request message to handover to the target base station when the base station is configured as the primary base station.
The sending module 502 is specifically configured to send the handover request message to a master base station in a base station group where a target base station of the user equipment to be handed over is determined to be an auxiliary base station in another base station group according to the handover request message when the base station is configured as the master base station, and the handover request message is forwarded to the target base station by the master base station in the base station group where the target base station is located.
Preferably, when the base station is configured as a master base station, the method further includes:
and an transparent transmission module 504, configured to transmit the handover request message through the primary base station when it is determined, according to the handover request message, that the target base station of the user equipment to be handed over is an auxiliary base station in the base station group where the primary base station is located.
Preferably, when the base station is configured as a master base station, the method further includes:
a storage module 505, configured to receive a non-access stratum NAS signaling sent by an auxiliary base station after a user equipment establishes a connection with the auxiliary base station, and acquire context information of the user included in the NAS signaling; and the NAS signaling is used for storing the context information of the user and transparently transmitting the NAS signaling to a core network.
Preferably, when the base station is configured as a master base station, the storage module 505 is further configured to: and receiving a release notice sent by an auxiliary base station after the user equipment on the auxiliary base station is successfully switched to a target base station outside the base station group, and releasing the context information of the user stored on the main base station according to the release notice.
Preferably, when the base station is configured as a master base station, the storage module 505 is further configured to: receiving an update notification sent by an auxiliary base station after user equipment on the auxiliary base station is successfully switched to a target auxiliary base station in the base station group, and updating the context information of the user stored on the main base station according to the update notification.
Preferably, when the base station is configured as a master base station, the method further includes:
a data module 506, configured to receive downlink data sent by a core network to the ue on the secondary base station, and send the downlink data to the ue corresponding to the downlink data according to the context information of the user residing on the secondary base station and stored in the primary base station.
Based on the same technical concept, the embodiment of the present invention further provides a system, which is applied to a base station group, where the base station group includes a main base station and an auxiliary base station, the main base station and the auxiliary base station are connected through a switching device, and the main base station stores context information of a user residing on the auxiliary base station. A system provided by an embodiment of the present invention is shown in fig. 6.
A primary base station 601, configured to receive a handover request message sent by a secondary base station; if the target base station of the switched user equipment is judged not to belong to the base station group where the main base station is located according to the switching request message, whether the target base station is an auxiliary base station in another base station group is judged according to the switching request message; if so, sending the switching request message to a main base station in a base station group where the target base station is located, wherein the switching request message is forwarded to the target base station by the main base station in the base station group where the target base station is located, otherwise, sending the switching request message to the target base station; informing the user on the auxiliary base station corresponding to the switching request message to switch to the target base station;
the secondary base station 602 is configured to send a handover request message to a primary base station, where the handover request message includes target base station information for handover of user equipment on the secondary base station; and the base station is also used for receiving a switching notification sent by the main base station and transmitting the notification to the user equipment on the auxiliary base station when the user equipment on the auxiliary base station is switched to a target base station outside the base station group.
The switching device 603 is configured to connect the main base station and the auxiliary base station, and forward the received message from the main base station or the auxiliary base station according to a pre-configured forwarding port correspondence.
The techniques described in a communication method, a base station and a system provided by the embodiments of the present invention may be implemented by hardware, software or a combination thereof. For a hardware implementation, the hardware implementation may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, and other electronic units designed to perform the functions described herein, or a combination thereof. For a software implementation, the techniques may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (15)
1. A communication method applied to a base station group including a primary base station and a secondary base station, the primary base station and the secondary base station being connected via a switching device, the primary base station having context information of a user residing on the secondary base station stored thereon, the method comprising:
the main base station receives a switching request message sent by an auxiliary base station in a base station group;
if the main base station judges that the target base station of the switched user equipment does not belong to the base station group where the main base station is located according to the switching request message, the main base station sends the switching request message to the target base station;
and the main base station informs the user equipment on the auxiliary base station corresponding to the switching request message to be switched to the target base station according to the context information of the user corresponding to the switched user equipment.
2. The method of claim 1, wherein if the primary base station determines, according to the handover request message, that a target base station of the user equipment to be handed over does not belong to a base station group in which the primary base station is located, sending the handover request message to the target base station, comprises:
if the main base station judges that the target base station of the switched user equipment is an auxiliary base station in another base station group according to the switching request message, the main base station sends the switching request message to the main base station in the base station group where the target base station is located, and the switching request message is forwarded to the target base station by the main base station in the base station group where the target base station is located.
3. The method of claim 1, further comprising:
and if the main base station judges that the target base station of the switched user equipment is the auxiliary base station in the base station group where the main base station is located according to the switching request message, the main base station transparently transmits the switching request message.
4. The method of claim 1, further comprising:
the main base station receives a non-access stratum (NAS) signaling sent by an auxiliary base station after user equipment establishes connection with the auxiliary base station, and context information of the user contained in the NAS signaling is obtained;
and the main base station stores the context information of the user and transparently transmits the NAS signaling to a core network.
5. The method of claim 1, further comprising:
and the main base station receives a release notice sent by the auxiliary base station after the user equipment on the auxiliary base station is successfully switched to the target base station outside the base station group, and releases the context information of the user stored on the main base station according to the release notice.
6. The method of claim 1, further comprising:
and the main base station receives an update notification sent by an auxiliary base station after user equipment on the auxiliary base station is successfully switched to a target auxiliary base station in the base station group, and updates the context information of the user stored on the main base station according to the update notification.
7. The method of any of claims 1 to 6, further comprising:
the main base station receives downlink data sent by a core network to user equipment on the auxiliary base station;
and the main base station sends the downlink data to an auxiliary base station where user equipment corresponding to the downlink data is located according to the context information of the user residing on the auxiliary base station and stored in the main base station, and the auxiliary base station sends the downlink data to the user equipment.
8. A base station, applied to a base station group, wherein the base station group includes a main base station and a secondary base station, the main base station and the secondary base station are connected through a switching device, and the main base station stores context information of a user residing on the secondary base station, and the base station comprises:
a receiving module, configured to receive a handover request message sent by a secondary base station in a base station group when the base station is configured as a primary base station;
a sending module, configured to send the handover request message to the target base station when the base station is configured as a master base station and when it is determined that the target base station of the user equipment to be handed over does not belong to the base station group where the master base station is located according to the handover request message;
and a notification module, configured to notify the ue on the secondary base station corresponding to the handover request message to handover to the target base station according to context information of a user corresponding to the handed over ue when the base station is configured as a primary base station.
9. The base station of claim 8, wherein the transmitting module, when the base station is configured as a master base station, is specifically configured to:
and when the target base station of the switched user equipment is judged to be an auxiliary base station in another base station group according to the switching request message, sending the switching request message to a main base station in the base station group where the target base station is located, wherein the switching request message is forwarded to the target base station by the main base station in the base station group where the target base station is located.
10. The base station of claim 8, when the base station is configured as a master base station, further comprising:
and the transparent transmission module is used for transmitting the switching request message through the main base station when the target base station of the switched user equipment is judged to be the auxiliary base station in the base station group where the main base station is located according to the switching request message.
11. The base station of claim 8, when the base station is configured as a master base station, further comprising:
a storage module, configured to receive a non-access stratum NAS signaling sent by an auxiliary base station after a user equipment establishes a connection with the auxiliary base station, and acquire context information of the user included in the NAS signaling; and the NAS signaling is used for storing the context information of the user and transparently transmitting the NAS signaling to a core network.
12. The base station of claim 8, wherein when the base station is configured as a master base station, the storage module is further configured to:
and receiving a release notice sent by an auxiliary base station after the user equipment on the auxiliary base station is successfully switched to a target base station outside the base station group, and releasing the context information of the user stored on the main base station according to the release notice.
13. The base station of claim 8, wherein when the base station is configured as a master base station, the storage module is further configured to:
receiving an update notification sent by an auxiliary base station after user equipment on the auxiliary base station is successfully switched to a target auxiliary base station in the base station group, and updating the context information of the user stored on the main base station according to the update notification.
14. The base station of any of claims 8 to 13, when configured as a master base station, further comprising:
and the data module is used for receiving downlink data sent by a core network to the user equipment on the auxiliary base station, and sending the downlink data to the user equipment corresponding to the downlink data according to the context information of the user residing on the auxiliary base station and stored on the main base station.
15. A communication system applied to a base station group including a primary base station and a secondary base station, the primary base station and the secondary base station being connected via a switching device, the primary base station having context information of a user residing on the secondary base station stored thereon, the system comprising:
the main base station is used for receiving a switching request message sent by the auxiliary base station in the base station group; if the target base station of the switched user equipment is judged not to belong to the base station group where the main base station is located according to the switching request message, whether the target base station is an auxiliary base station in another base station group is judged according to the switching request message; if so, sending the switching request message to a main base station in a base station group where the target base station is located according to the context information of the user corresponding to the switched user equipment, wherein the switching request message is forwarded to the target base station by the main base station in the base station group where the target base station is located, otherwise, sending the switching request message to the target base station; informing the user equipment on the auxiliary base station corresponding to the switching request message to switch to the target base station;
the auxiliary base station is used for sending a switching request message to the main base station, wherein the switching request message comprises target base station information switched by the user equipment on the auxiliary base station; the base station is also used for receiving a switching notice sent by the main base station when the user equipment on the auxiliary base station is switched to a target base station outside the base station group and transmitting the notice to the user equipment on the auxiliary base station;
and the switching equipment is used for connecting the main base station and the auxiliary base station and forwarding the received message from the main base station or the auxiliary base station according to the pre-configured corresponding relation of the forwarding ports.
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| KR102389624B1 (en) | 2017-12-07 | 2022-04-21 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | Method and apparatus for obtaining terminal context, computer storage medium |
| CN110691427B (en) | 2018-07-05 | 2021-10-19 | 华为技术有限公司 | Service transmission method and device |
| CN112703698B (en) * | 2019-01-29 | 2023-07-11 | Oppo广东移动通信有限公司 | Access network node management method, terminal device, network device and storage medium |
| CN111918345B (en) * | 2019-05-09 | 2021-08-27 | 大唐移动通信设备有限公司 | Method and device for switching main node and auxiliary node under non-independent networking scene |
| CN112399505B (en) * | 2019-08-19 | 2022-06-21 | 大唐移动通信设备有限公司 | Auxiliary base station switching method of terminal equipment and base station |
| CN111148137B (en) * | 2019-12-30 | 2023-06-27 | 宇龙计算机通信科技(深圳)有限公司 | Data transmission method and device, storage medium and terminal |
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