CN117320152A - Paging device and method between 5G stations - Google Patents
Paging device and method between 5G stations Download PDFInfo
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- CN117320152A CN117320152A CN202311606071.1A CN202311606071A CN117320152A CN 117320152 A CN117320152 A CN 117320152A CN 202311606071 A CN202311606071 A CN 202311606071A CN 117320152 A CN117320152 A CN 117320152A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/02—Arrangements for increasing efficiency of notification or paging channel
Abstract
The application belongs to the technical field of 5G communication, and particularly relates to a paging device and method between 5G stations. In the method, the coverage area of the base station A is larger, the base station A is set as a paging station, the small station performs supplementary coverage within the range of the base station A, xn connection is performed between the small station and the base station A, and RNA and TA of the small station under the base station A are configured. After the UE enters an inactive/idle state, the system side cannot know the base station where the UE is located under the condition that the RNA/TA area is not moved, and when paging is needed, paging messages are needed to be sent to all base stations under the RNA/TA, and only the paging messages are sent to one base station, so that the transmission of the paging messages of XN and NG interfaces can be effectively reduced, and the number of the messages of the XN/NG interfaces is reduced.
Description
Technical Field
The application belongs to the technical field of 5G communication, and particularly relates to a paging device and method between 5G stations.
Background
In a wireless communication system, a base station may configure a UE terminal (User Equipment) to enter a RRC (Radio Resource Control) idle or inactive state, and the base station does not sense when the UE moves between stations. When the system needs to page the UE, the core network will issue paging to the UE at last at the base station, but because the UE may not be at the base station when entering the idle/inactive state, the base station or the core network does not know which base station the UE is at, and may send paging messages to many base stations, which wastes interface resources.
Disclosure of Invention
The embodiment of the application provides a paging method between 5G stations, which can effectively reduce paging messages and reduce the load of an NG/Xn interface.
In a first aspect, an embodiment of the present application provides a paging device between 5G stations, where a coverage area of a base station a is larger, a base station a is set as a paging station, a cell performs supplementary coverage within the coverage area of the base station a, an XN connection is performed between the cell and the base station a, RNA and TA of the cell under the base station a are configured,
the configuration with the core network is as follows: each base station establishes NG connection with the core network when opening the station, wherein the base station A carries a paging station identifier in the NG link establishment request message to the core network, which indicates that the base station is a paging station, and the field needs to be newly added; meanwhile, each base station brings the TA identifier supported by the base station to the core network when establishing a link; meanwhile, each base station brings the RNA identifier supported by the base station to the core network when establishing a link, and the field needs to be newly added;
the core network maintains a paging base station,
when receiving the NG establishment connection request, if the base station is found to be a paging station, correlating the base station ID with TA ID and RNA ID to form base station ID-TA ID-RNA ID information;
the configuration between base stations is as follows: when each base station is opened, XN connection is established between the base station and other stations, wherein when the base station A establishes a link with XN, the base station A carries a paging station identifier to the other base stations, and the base station A indicates that the base station is a paging station; and when the other base stations receive the identification, the base station ID is associated with the TA ID and the RNA ID to form base station ID-TA ID-RNA ID information.
Preferably, the RNA supported by the home station is identified as all cells of the home station and the RNA to which the home station belongs.
The application provides a paging method between 5G stations, when a network side needs to initiate paging to a terminal, UE (user equipment) can enter a rrc inactive/idle state when no service exists after accessing to a small station;
if the UE needs to enter the inactive state,
the small base station informs the core network that the terminal enters an inactive state, and the core network records that the terminal enters the inactive state and stores the state in a user context;
if the terminal performs RNA updating, the terminal enters an inactive state after the updating is released, and a new base station informs a core network that the terminal enters the inactive state;
the core network considers that the terminal is in an RRC connection state, and directly transmits downlink data service or paging to a base station which is accessed last before the terminal air interface is released;
if the UE needs to enter the idle state,
the base station informs the core network that the UE enters an idle state, and the core network records that the terminal enters the idle state;
if the terminal moves to other TAs, TAU updating is needed, and the core network records that the terminal enters a new TA;
after the terminal is paged, the terminal can access at the paging base station,
the paging base station adds other small station cells in the range of the RNA/TA associated with the paging base station as neighbor cells in advance;
performing cell specific bias (CIO) setting for each cell neighboring cell of each paging base station, and improving the CIO value; the base station configures measurement configuration for the user, carries CIO parameters of a neighboring cell, and sends the CIO parameters to the terminal, and the terminal performs measurement and report of a measurement report according to the measurement configuration; the terminal is accessed after being called up, and the base station switches the terminal from the paging base station to other small stations as soon as possible after receiving the measurement report.
Preferably, if the UE needs to enter the inactive state, between the base station and the core network,
s1, when a core network finds that the terminal needs downlink service or paging, the core network inquires a stored user context, and if the terminal is confirmed to be in an RRC inactive state, the cell information of the terminal is acquired in the context, and the RNA area of the cell is further confirmed;
s2, according to the base station paging maintained by the core network in the step S1, the core network can obtain the base station ID of the paging to be issued, and then sends the paging message to the paging base station;
s3, after receiving the paging message of the core network, the paging base station directly performs paging within the range of the local station;
s4, the UE does not exceed the range of the RNA, and is called by the paging base station under the coverage area of the paging base station.
Preferably, if the UE needs to enter the inactive state, processing is performed between the individual base stations, and if the base station where the terminal is located last is not a paging base station:
when the base station receives the downlink data of the user to arrive or the core network pages, the terminal needs to be paged; the base station knows the RNA of the terminal; the base station inquires the paging base station obtained in the first step, and tracks the current RNA of the terminal to find the ID of the paging base station to be issued; then the small base station sends RAN paging information of XN interface to the paging base station; meanwhile, the small base station transmits a paging message on an air interface of the small base station;
after receiving the RAN paging message of the small base station, the paging base station initiates paging on an air interface, and then the terminal can be called up;
if the last base station of the terminal is a paging base station, the paging message of the air interface is directly issued under the base station, and the terminal can be called.
Preferably, if the UE needs to enter the idle state,
if the terminal moves to other TAs, TAU updating is needed, and the core network records that the terminal enters a new TA;
step one: when the core network needs to page the UE, the stored user information is found in a core network element, the user is confirmed to be an idle user, then the TA area where the UE is currently located is confirmed, and the TA ID of the UE is obtained;
step two: the core network searches the maintained paging base station, acquires the base station ID of the base station which the paging should issue according to the TA ID, and then sends the paging message to the base station A independently;
step three: after receiving paging information of core network, base station A directly carries out paging in range of own station;
step four: since the UE does not exceed the TA range, the UE is called by the base station a under the coverage of the base station a.
In a third aspect, a computer-readable storage medium stores a computer program which, when executed by a processor, implements the method according to the second aspect.
Compared with the prior art, the embodiment of the application has the beneficial effects that: after the UE enters an inactive/idle state, the system side cannot know the base station where the UE is located under the condition that the RNA/TA area is not moved, and when paging is needed, paging messages are needed to be sent to all base stations under the RNA/TA, and only the paging messages are sent to one base station, so that the transmission of the paging messages of Xn and NG interfaces can be effectively reduced, and the number of the messages of the XN/NG interfaces is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a device architecture diagram provided herein;
fig. 2 is a schematic diagram of coverage between a base station a and a small station provided in the present application;
fig. 3 is a flowchart of interaction between a base station and a core network provided in the present application;
FIG. 4 is a flow chart of individual base station information processing provided herein;
fig. 5 is a paging flow chart of a UE and a small cell provided in the second embodiment of the present application;
fig. 6 is a paging flow chart of a small cell n and a small cell m provided in the fourth embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, and circuits are omitted so as not to obscure the description of the present application with unnecessary detail.
The network side performs location management of the terminal through the tracking area TA (Tracking Area) and the base station-based notification area RNA (RAN-based Notification Area).
After the terminal is accessed to the base station, if the service is not performed, the base station can trigger the terminal to enter an RRC idle state or an RRC inactive state in order to save power of the terminal.
After the terminal is accessed to the base station, the base station side can acquire the TA and the RNA of the terminal, and the core network side can acquire the TA of the terminal.
In the RRC idle state, the core network knows that the terminal is not connected with the base station through an air interface, and the core network knows the tracking area TA where the terminal is located.
When downlink service is needed or other reasons need to call up the terminal, if the terminal does not do TAU (Tracking Area Update), the core network pages under the original TA (Tracking Area), namely, sends paging messages to the base stations of all cells under the TA; if the terminal performs TAU, the core network performs paging under the new TA;
in the RRC inactive state, the core network still retains the context of the terminal, and considers that the terminal is connected with the base station or has an air interface, only the base station releases the air interface resource for the terminal, and the base station knows the RNA in which the terminal is located. When the downlink service is needed or other reasons need to call up the terminal, the core network can send data or paging to the base station to which the terminal is originally connected, and the base station sends paging in the range of RNA or sends base station paging to all other base stations; if the terminal moves into a new RNA range, the terminal is required to be updated, and the terminal is re-accessed to perform the RNA updating action, and the base station knows that the terminal enters the new RNA range.
As shown in fig. 1-2, embodiments of the present application provide a method for 5G inter-station paging,
the network deployment connection and coverage are shown in fig. 1 and 2.
1. The coverage area of the base station A is larger, the base station A is set as a paging station, the small station performs supplementary coverage within the range of the base station A, xn connection exists between the small station and the base station A, and RNA and TA of the small station under the base station A are configured.
2. Interaction with core network
(1) Each base station establishes NG connection with the core network when opening the station, wherein the base station A carries a paging station identifier in the NG link establishment request message to the core network, which indicates that the base station is a paging station, and the field needs to be newly added; meanwhile, each base station brings the TA identifier supported by the base station to the core network (namely, the TA of all cells of the base station) when the base station builds a link; meanwhile, each base station brings the RNA identifier supported by the base station to the core network (namely all cells of the base station and the RNA to which the base station belongs) when establishing a chain, and the field needs to be newly added;
(2) The core network maintains a paging base station, when receiving a NG establishment connection request, if the base station is found to be a paging station, the base station ID is associated with TA ID and RNA ID to form base station ID-TA ID-RNA ID information;
in particular, the method comprises the steps of,
for example, there are TAs a1, a2, RNAs b1, b2, b3 under base station a, and base station a is a paging station,
under base station B there are TAs a2, a3, RNAs B3, B4, B5, and base station B is a paging station,
under base station C, which is not the paging station,
the paging base station information maintained by the core network is as follows:
{
{ TA paging information: { a1, A }, { a2, B }, { a3, B }
{ RNA paging information: { B1, A }, { B2, A }, { B3, A }, { B3, B }, { B4, B }, { B5, B }, and
}
the core network maintains a TA paging message and an RNA paging message for handling paging relationships between base stations a and B. These two pieces of information record paging messages between base stations a and A, B and between base stations a and B, respectively. When device B needs to communicate with device a, it sends a paging message to device a, which responds to the paging message based on the TA paging information and performs the corresponding operation based thereon.
3. Interaction between base stations
(1) When each base station is opened, XN connection is established between the base station and other stations, wherein when the base station A establishes a link with XN, the base station A carries a paging station identifier to the other base stations, and the base station A indicates that the base station is a paging station;
(2) When other base stations receive the identification, the base station ID is associated with the TA ID and the RNA ID to form base station ID-TA ID-RNA ID information;
in particular, the method comprises the steps of,
for example, there are TAs a1, a2, RNAs b1, b2, b3 under base station a, and base station a is a paging station,
under base station B there are TAs a2, a3, RNAs B3, B4, B5, and base station B is a paging station,
under base station C, which is not the paging station,
each base station selects paging station information for the TA and RNA of the cell under the station,
the paging information maintained by base station a is as follows:
{
{ TA paging information: { a1, A }, { a2, B }
{ RNA paging information: { B1, A }, { B2, A }, { B3, A }, { B3, B }
}
The paging information maintained by the base station B is as follows:
{
{ TA paging information: { a2, A }, { a2, B }, { a3, B }
{ RNA paging information: { B3, A }, { B3, B }, { B4, B }, { B5, B }
}
The paging base station information maintained by the base station C is as follows:
{
{ TA paging information: { a1, A }, { a3, B }
{ RNA paging information: { B1, A }, { B3, A }, { B3, B }, { B5, B }
}
When the network side needs to initiate paging to the terminal,
after the UE accesses the small station, the rrc inactive/idle state may be entered when there is no service,
1. if UE needs to enter an inactive state, the following two methods can be adopted to page the terminal
1) Base station/core network combination mode
As shown in fig. 3, the small base station informs the core network that the terminal enters an inactive state, and the core network records that the terminal enters the inactive state and stores the state in a user context;
if the terminal performs RNA updating, the terminal enters an inactive state after the updating is released, and the new base station informs the core network that the terminal enters the inactive state.
1.1, when the core network finds that the terminal needs to carry out downlink service or needs to page the terminal, the core network inquires about the saved user context, and if the terminal is confirmed to be in an RRC inactive state, the cell information of the terminal is acquired in the context, and the RNA area of the cell is further confirmed;
1.2, according to the base station paging maintained by the core network in the first step, the core network can obtain the base station ID of the paging to be issued, and then sends the paging message to the paging base station;
1.3, after receiving the paging message of the core network, the paging base station directly carries out paging within the range of the local station;
1.4, because the UE does not exceed the range of the RNA, the UE is called by the paging base station under the coverage area of the paging base station;
2) Processing mode of single base station
As shown in fig. 4;
the core network considers that the terminal is in an RRC connection state, and directly transmits downlink data service or paging to a base station which is accessed last before the terminal air interface is released.
(1) If the last base station of the terminal is not a paging base station:
2.1, when the base station receives the downlink data of the user to arrive or the core network pages, the terminal needs to be paged;
2.2, the base station knows the RNA of the terminal;
2.3, the base station inquires the paging base station obtained in the first step, and tracks the current RNA of the terminal to find the ID of the paging base station to be issued;
2.3, then the small base station sends RAN paging information of XN interface to the paging base station; meanwhile, the small base station transmits a paging message on an air interface of the small base station;
and 2.4, after receiving the RAN paging message of the small base station, the paging base station initiates paging on an air interface, and then the terminal can be called.
(2) If the last base station of the terminal is a paging base station, the paging message of the air interface is directly issued under the base station, and the terminal can be called.
2. If UE needs to enter idle state, the following method is adopted to page the terminal
As shown in fig. 5, the small base station informs the core network that the UE enters the idle state, and the core network records that the terminal enters the idle state;
if the terminal moves to other TAs, TAU updating is needed, and the core network records that the terminal enters a new TA;
1.1, when a core network needs to page the UE, finding the stored user information in a core network element, confirming that the user is an idle user, then confirming the current TA area of the UE, and obtaining the TA ID of the UE;
1.2, the core network searches the maintained paging base station, acquires the base station ID of the base station which should be issued by the paging according to the TA ID, and then sends the paging message to the base station A independently;
1.3, after receiving paging information of the core network, the base station A directly carries out paging within the range of the local station;
1.4, because the UE does not exceed the TA range, the UE is called by the base station A under the coverage of the base station A;
3. after the terminal is paged, the terminal can access at the paging base station, and the related method is as follows:
1) Configuration of paging base station:
(1) The paging base station adds other small station cells in the range of the RNA/TA associated with the paging base station as neighbor cells in advance;
(2) Setting a cell specific bias CIO (Cell Individual Offset) for each cell neighbor of each paging base station, and increasing the CIO value;
2) Access after the terminal is called:
the base station configures measurement configuration for the user, carries CIO parameters of a neighboring cell, and sends the CIO parameters to the terminal, and the terminal performs measurement and report of a measurement report according to the measurement configuration;
after receiving the measurement report, the base station switches the terminal from the paging base station to other small stations as soon as possible.
As will be described in more detail below,
example 1
The UE accesses the small base station m and does not move out of the range of the RNA area.
The small base station m informs a core network that the UE enters an inactive state, and the core network records the terminal;
1. when the core network needs to page the UE, the paging message is directly sent to the base station A;
2. after receiving paging information of core network, base station A carries out paging at own station;
3. after the UE is accessed to the system, the core network releases the record of the terminal entering the inactive state;
example 2
The UE accesses the small base station m and moves out of the range of the RNA area.
The small base station m informs a core network that the UE enters an inactive state, and the core network records the terminal;
as shown in fig. 5, for example, the UE moves from small base station m to small base station n;
1. the UE performs RNA updating, and the core network knows that the UE enters a new RNA area;
2. when the core network needs to page the UE, the paging message is directly sent to the base station B;
3. after receiving paging information of core network, base station B carries out paging at own station;
4. after the UE is accessed to the system, the core network releases the record of the terminal entering the inactive state;
example 3
The UE accesses the small base station m and does not move out of the range of the RNA area.
The small base station m informs the core network that the UE enters an inactive state;
1. when the core network needs to page the UE, sending a paging message to a small base station m;
2. after receiving paging information of core network, small base station m sends RAN paging to base station A;
3. after receiving the RAN paging, the base station A performs paging at the base station;
example 4
The UE accesses the small base station m and moves out of the range of the RNA area.
The small base station m informs a core network that the UE enters an inactive state, and the core network records the terminal;
as shown in fig. 6, for example, the UE moves from small base station m to small base station n;
1. the UE performs RNA updating, and the core network knows that the UE enters a new RNA area;
2. when the core network needs to page the UE, sending a paging message to a small base station n;
3. after receiving paging information of core network, small base station m sends RAN paging to base station B;
4. after receiving the RAN paging, the base station B performs paging at the own station;
those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (7)
1. The utility model provides a 5G inter-station paging device, base station A coverage is great, sets up base station A as paging station, and little station carries out supplementary coverage in base station A scope, carries out existence XN connection between little station and the base station A, disposes the RNA and the TA of little station under the base station A, its characterized in that:
the configuration with the core network is as follows: each base station establishes NG connection with the core network when opening the station, wherein the base station A carries a paging station identifier in the NG link establishment request message to the core network, which indicates that the base station is a paging station, and the field needs to be newly added; meanwhile, each base station brings the TA identifier supported by the base station to the core network when establishing a link; meanwhile, each base station brings the RNA identifier supported by the base station to the core network when establishing a link, and the field needs to be newly added;
the core network maintains a paging base station,
when receiving the NG establishment connection request, if the base station is found to be a paging station, correlating the base station ID with TA ID and RNA ID to form base station ID-TA ID-RNA ID information;
the configuration between base stations is as follows: when each base station is opened, XN connection is established between the base station and other stations, wherein when the base station A establishes a link with XN, the base station A carries a paging station identifier to the other base stations, and the base station A indicates that the base station is a paging station; and when the other base stations receive the identification, the base station ID is associated with the TA ID and the RNA ID to form base station ID-TA ID-RNA ID information.
2. The 5G inter-station paging apparatus as claimed in claim 1, wherein: the RNA supported by the station is identified as the RNA of all cells of the station.
3. A method for paging between 5G stations, characterized by: when the network side needs to initiate paging to the terminal, after the UE accesses the small station, the UE enters a rrc inactive/idle state when no service exists;
if the UE needs to enter the inactive state,
the small base station informs the core network that the terminal enters an inactive state, and the core network records that the terminal enters the inactive state and stores the state in a user context;
if the terminal performs RNA updating, the terminal enters an inactive state after the updating is released, and a new base station informs a core network that the terminal enters the inactive state;
the core network considers that the terminal is in an RRC connection state, and directly transmits downlink data service or paging to a base station which is accessed last before the terminal air interface is released;
if the UE needs to enter the idle state,
the base station informs the core network that the UE enters an idle state, and the core network records that the terminal enters the idle state;
if the terminal moves to other TAs, TAU updating is needed, and the core network records that the terminal enters a new TA;
after the terminal is paged, the terminal can access at the paging base station,
the paging base station adds other small station cells in the range of the RNA/TA associated with the paging base station as neighbor cells in advance;
performing cell specific bias (CIO) setting for each cell neighboring cell of each paging base station, and improving the CIO value; the base station configures measurement configuration for the user, carries CIO parameters of a neighboring cell, and sends the CIO parameters to the terminal, and the terminal performs measurement and report of a measurement report according to the measurement configuration; the terminal is accessed after being called up, and the base station switches the terminal from the paging base station to other small stations as soon as possible after receiving the measurement report.
4. A method of 5G inter-station paging as claimed in claim 3, when communicating between a base station and a core network, wherein: if the UE needs to enter an inactive state, between the base station and the core network,
s1, when a core network finds that the terminal needs downlink service or paging, the core network inquires a stored user context, and if the terminal is confirmed to be in an RRC inactive state, the cell information of the terminal is acquired in the context, and the RNA area of the cell is further confirmed;
s2, according to the base station paging maintained by the core network in the step S1, the core network can obtain the base station ID of the paging to be issued, and then sends the paging message to the paging base station;
s3, after receiving the paging message of the core network, the paging base station directly performs paging within the range of the local station;
s4, the UE does not exceed the range of the RNA, and is called by the paging base station under the coverage area of the paging base station.
5. A method of 5G inter-station paging as claimed in claim 3, when communicating between a base station and a core network, wherein: if the UE needs to enter an inactive state, processing is performed among the independent base stations, and if the base station where the terminal is located at last is not a paging base station:
when the base station receives the downlink data of the user to arrive or the core network pages, the terminal needs to be paged; the base station knows the RNA of the terminal; the base station inquires the paging base station obtained in the first step, and tracks the current RNA of the terminal to find the ID of the paging base station to be issued; then the small base station sends RAN paging information of XN interface to the paging base station; meanwhile, the small base station transmits a paging message on an air interface of the small base station;
after receiving the RAN paging message of the small base station, the paging base station initiates paging on an air interface, and then the terminal can be called up;
if the last base station of the terminal is a paging base station, the paging message of the air interface is directly issued under the base station, and the terminal can be called.
6. A method of 5G inter-station paging as claimed in claim 3, wherein: if the UE needs to enter the idle state,
if the terminal moves to other TAs, TAU updating is needed, and the core network records that the terminal enters a new TA;
step one: when the core network needs to page the UE, the stored user information is found in a core network element, the user is confirmed to be an idle user, then the TA area where the UE is currently located is confirmed, and the TA ID of the UE is obtained;
step two: the core network searches the maintained paging base station, acquires the base station ID of the base station which the paging should issue according to the TA ID, and then sends the paging message to the base station A independently;
step three: after receiving paging information of core network, base station A directly carries out paging in range of own station;
step four: since the UE does not exceed the TA range, the UE is called by the base station a under the coverage of the base station a.
7. A computer readable storage medium storing a computer program which, when executed by a processor, implements the method of any of claims 3-6.
Priority Applications (1)
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