CN114041297A - Communication system - Google Patents

Communication system Download PDF

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Publication number
CN114041297A
CN114041297A CN201980098146.5A CN201980098146A CN114041297A CN 114041297 A CN114041297 A CN 114041297A CN 201980098146 A CN201980098146 A CN 201980098146A CN 114041297 A CN114041297 A CN 114041297A
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CN
China
Prior art keywords
management area
notification
terminal
network
network device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201980098146.5A
Other languages
Chinese (zh)
Inventor
贺敬
J·科斯克拉
J-P·科斯基南
A·克拉斯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Original Assignee
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
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Publication date
Application filed by Nokia Shanghai Bell Co Ltd, Nokia Solutions and Networks Oy filed Critical Nokia Shanghai Bell Co Ltd
Publication of CN114041297A publication Critical patent/CN114041297A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • 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
    • H04W68/06—User notification, e.g. alerting and paging, for incoming communication, change of service or the like using multi-step notification by changing the notification area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A communication device is disclosed. There is provided a network apparatus including: means for configuring a first management area and a second management area for the terminal when the terminal is in a reduced mode of operation, wherein the second management area includes fewer access points than the first management area; means for selecting one of the first management area and the second management area for transmission to the terminal; and means for transmitting to the terminal using the selected management area.

Description

Communication system
Technical Field
The present disclosure relates to methods and apparatus, and in particular, but not exclusively, to methods and apparatus relating to configuring a management area.
Background
A communication system may be seen as a facility in which communication between two or more devices, such as user terminals, machine-like terminals, base stations and/or other nodes, is achieved by providing carriers between the communicating devices. For example, a communication system may be provided by a communication network and one or more compatible communication devices. The communication may include, for example, communication of data for carrying communications such as voice, electronic mail (email), text messages, multimedia and/or content data. Non-limiting examples of services provided include two-way or multi-way calls, data communication or multimedia services, and access to data network systems such as the internet.
Disclosure of Invention
According to a first aspect, there is provided a network device comprising: means for configuring a first management area and a second management area for the terminal when the terminal is in a reduced mode of operation, wherein the second management area includes fewer access points than the first management area; means for selecting one of the first management area and the second management area for transmission to the terminal; and means for transmitting to the terminal using the selected management area.
The network apparatus may further include: means for receiving a first notification that the terminal has left the second management area, wherein the means for selecting selects the first management area based on the received first notification.
The network apparatus may further include: means for receiving a second notification that the terminal has entered a second management area, wherein the means for selecting selects the second management area based on the received second notification.
The network apparatus may further include: means for receiving a first notification that the terminal has left the second management area; and means for receiving a second notification that the terminal has entered the second management area, wherein the means for selecting selects one of the first management area and the second management area according to which of the first notification and the second notification has been received most recently.
The notification may be received from at least one of the user terminal and another network device.
The means for selecting may select the second management area when a notification that the terminal leaves the second management area is not received.
The network apparatus may also include means for transmitting a first dedicated preamble to the terminal, the first dedicated preamble being associated with the terminal leaving the second management area.
The network apparatus may also include means for transmitting a second dedicated preamble to the terminal, the second dedicated preamble being associated with the terminal entering the second management area.
According to a second aspect, there is provided an apparatus comprising: means for receiving, from a network device while the device is in a reduced mode of operation, at least one configuration for configuring a first management area and a second management area, wherein the second management area includes fewer access points than the first management area; and means for receiving a transmission via the first management area or the second management area, wherein on which of the first management area and the second management area the transmission is received depends on a current location of the apparatus.
The apparatus may further include: means for sending a first notification that the apparatus has left the second management area, wherein the means for receiving receives a transmission over the first management area in response to the sent first notification.
The apparatus may further include: means for sending a second notification that the apparatus has entered a second management area, wherein the means for receiving receives a transmission over the second management area in response to the transmitted second notification.
The apparatus may further include: means for sending a first notification that the apparatus has left the second management area; and means for transmitting a second notification that the apparatus has entered the second management area, wherein the means for receiving receives a transmission on one of the first management area and the second management area based on which of the first notification and the second notification has been transmitted most recently.
The notification may be sent to at least one of the network device and another network device.
The means for receiving may receive a transmission on the second management area when a notification about the apparatus leaving the second management area has not been sent by the apparatus.
The apparatus can also include means for transmitting a first dedicated preamble to the network, the first dedicated preamble associated with a terminal leaving the second management area.
The apparatus can also include means for transmitting a second dedicated preamble associated with a terminal entering a second management area.
According to a third aspect, there is provided a network apparatus comprising: means for receiving at least one of a first notification and a second notification from a terminal in a reduced mode of operation, wherein the first notification indicates that the terminal is leaving a management area and the second notification indicates that the terminal has entered the management area; and means for notifying the network device serving the terminal of the received notification type.
The network apparatus may further include: means for providing a first preamble to the terminal, wherein the first preamble is a first notification; and means for providing a second preamble to the terminal, wherein the second preamble is the second notification.
The means for notifying the network device serving the terminal of the received notification may be an Xn interface or an X2 interface.
According to a fourth aspect, there is provided a method for a network device, the method comprising: configuring a first management area and a second management area for the terminal when the terminal is in a reduced operation mode, wherein the second management area comprises fewer access points than the first management area; selecting one of the first management area and the second management area for transmission to the terminal; and transmitting to the terminal using the selected management area.
The method may further comprise: receiving a first notification that the terminal has left the second management area, wherein the selection selects the first management area based on the received first notification.
The method may further comprise: receiving a second notification that the terminal has entered a second management area, wherein the selecting selects the second management area based on the received second notification.
The method may further comprise: receiving a first notification that the terminal has left the second management area; and receiving a second notification that the terminal has entered the second management area, wherein the selection selects one of the first management area and the second management area according to which of the first notification and the second notification has been received most recently.
The notification may be received from at least one of the user terminal and another network device.
The selection may select the second management area when a notification that the terminal leaves the second management area is not received.
The method may also include transmitting a first dedicated preamble to the terminal, the first dedicated preamble being associated with the terminal leaving the second management area.
The method may further include transmitting a second dedicated preamble to the terminal, the second dedicated preamble being associated with the terminal entering the second management area.
According to a fifth aspect, there is provided a method comprising: receiving, from the network device, at least one configuration for configuring a first management area and a second management area when the device is in a reduced mode of operation, wherein the second management area includes fewer access points than the first management area; and receiving a transmission via the first management area or the second management area, wherein on which of the first management area and the second management area the transmission is received depends on the current location of the apparatus.
The method may further comprise: a first notification that the apparatus has left the second management area is sent, wherein the receiving receives a transmission on the first management area in response to the sent first notification.
The method may further comprise: sending a second notification that the apparatus has entered a second management area, wherein the receiving receives a transmission over the second management area in response to the transmitted second notification.
The method may further comprise: sending a first notification that the apparatus has left the second management area; and transmitting a second notification that the apparatus has entered the second management area, wherein the receiving receives the transmission on one of the first management area and the second management area according to which of the first notification and the second notification has been transmitted most recently.
The notification may be sent to at least one of the network device and another network device.
The receiving may receive a transmission over the second management area when a notification that the apparatus left the second management area has not been sent by the apparatus.
The method may also include transmitting a first dedicated preamble to the network, the first dedicated preamble being associated with a terminal leaving the second management area.
The method may further include transmitting a second dedicated preamble associated with a terminal entering a second management area.
According to a sixth aspect, there is provided a method for a network device, the method comprising: receiving at least one of a first notification and a second notification from a terminal in a reduced operation mode, wherein the first notification indicates that the terminal is leaving a management area and the second notification indicates that the terminal has entered the management area; and notifying the network device serving the terminal of the received notification type.
The method may further comprise: providing a first preamble to the terminal, wherein the first preamble is a first notification; and providing the terminal with a second preamble, wherein the second preamble is the second notification.
The notification of the received notification to the network device of the service terminal may be performed via an Xn interface or an X2 interface.
According to a seventh aspect, there is provided a network apparatus comprising at least one processor and at least one memory including code, wherein when the code is run on the at least one processor, the apparatus is caused to: configuring a first management area and a second management area for the terminal when the terminal is in a reduced operation mode, wherein the second management area comprises fewer access points than the first management area; selecting one of the first management area and the second management area for transmission to the terminal; and transmitting to the terminal using the selected management area.
The network apparatus may be further caused to: receiving a first notification that the terminal has left the second management area, wherein the network device may be caused to select the first management area based on the received first notification.
The network apparatus may be further caused to: receiving a second notification that the terminal has entered a second management area, wherein the network device may be caused to select the second management area based on the received second notification.
The network apparatus may be further caused to: receiving a first notification that the terminal has left the second management area; and receiving a second notification that the terminal has entered the second management area, wherein the network device may be caused to select one of the first management area and the second management area according to which of the first notification and the second notification has been received most recently.
The notification may be received from at least one of the user terminal and another network device.
The network apparatus may be caused to select the second management area when a notification about the terminal leaving the second management area is not received.
The network apparatus may be caused to transmit a first dedicated preamble to the terminal, the first dedicated preamble being associated with the terminal leaving the second management area.
The network apparatus may be caused to transmit a second dedicated preamble to the terminal, the second dedicated preamble being associated with the terminal entering the second management area.
According to an eighth aspect, there is provided a network apparatus comprising at least one processor and at least one memory including code, wherein when the code is run on the at least one processor, the apparatus is caused to: receiving, from the network device, at least one configuration for configuring a first management area and a second management area when the device is in a reduced mode of operation, wherein the second management area includes fewer access points than the first management area; and receiving a transmission via the first management area or the second management area, wherein on which of the first management area and the second management area the transmission is received depends on the current location of the apparatus.
The network device may be caused to: a first notification that the device has left the second management area is sent, wherein the network device may be caused to receive a transmission over the first management area in response to the sent first notification.
The network device may be caused to: sending a second notification that the device has entered a second management area, wherein the network device may be caused to receive a transmission over the second management area in response to the transmitted second notification.
The network device may be caused to: sending a first notification that the apparatus has left the second management area; and transmitting a second notification that the device has entered the second management area, wherein the network device may be caused to receive transmissions on one of the first and second management areas depending on which of the first and second notifications has been most recently transmitted.
The notification may be sent to at least one of the network device and another network device.
The network device may be caused to receive a transmission over the second management area when a notification that the device left the second management area has not been sent by the device.
The network device may be caused to transmit a first dedicated preamble to the network, the first dedicated preamble being associated with a terminal leaving the second management area.
The network device may be caused to transmit a second dedicated preamble, the second dedicated preamble being associated with a terminal entering a second administrative area.
According to a ninth aspect, there is provided a network apparatus comprising at least one processor and at least one memory including code, wherein when the code is run on the at least one processor, the apparatus is caused to: receiving at least one of a first notification and a second notification from a terminal in a reduced operation mode, wherein the first notification indicates that the terminal is leaving a management area and the second notification indicates that the terminal has entered the management area; and notifying the network device serving the terminal of the received notification type.
The network device may be caused to: providing a first preamble to the terminal, wherein the first preamble is a first notification; and providing the terminal with a second preamble, wherein the second preamble is the second notification.
The network device may be caused to notify the network device serving the terminal of the received notification via the Xn interface or the X2 interface.
According to a tenth aspect, there is provided an apparatus comprising: configuration circuitry to configure a first management area and a second management area for the terminal when the terminal is in a reduced mode of operation, wherein the second management area includes fewer access points than the first management area; means for selecting one of the first management area and the second management area for transmission to the terminal; and transmission circuitry for transmitting to the terminal using the selected management area.
The network apparatus may further include: receiving circuitry for receiving a first notification that the terminal has left the second management area, wherein the means for selecting selects the first management area based on the received first notification.
The network apparatus may further include: receiving circuitry for receiving a second notification that the terminal has entered a second management area, wherein the means for selecting selects the second management area based on the received second notification.
The network apparatus may further include: receiving circuitry to receive a first notification that the terminal has left the second management area; and receiving circuitry for receiving a second notification that the terminal has entered the second management area, wherein the selecting circuitry for selecting selects one of the first management area and the second management area in dependence on which of the first notification and the second notification has been received most recently.
The notification may be received from at least one of the user terminal and another network device.
When a notification that the terminal leaves the second management area is not received, the selection circuitry for selecting may select the second management area.
The network apparatus may also include transmission circuitry to transmit a first dedicated preamble to the terminal, the first dedicated preamble associated with the terminal leaving the second management area.
The network apparatus may also include transmission circuitry to transmit a second dedicated preamble to the terminal, the second dedicated preamble associated with the terminal entering the second administrative area.
According to an eleventh aspect, there is provided an apparatus comprising: receive circuitry to receive, from a network device while the device is in a reduced mode of operation, at least one configuration to configure a first management area and a second management area, wherein the second management area includes fewer access points than the first management area; and receive circuitry to receive a transmission via the first management area or the second management area, wherein on which of the first management area and the second management area the transmission is received depends on a current location of the apparatus.
The apparatus may also include transmission circuitry to transmit a first notification that the apparatus has left the second management area, wherein the means for receiving receives a transmission over the first management area in response to the transmitted first notification.
The apparatus may further include: transmission circuitry for transmitting a second notification that the apparatus has entered a second management area, wherein the means for receiving receives a transmission over the second management area in response to the transmitted second notification.
The apparatus may further include: transmission circuitry to transmit a first notification that the apparatus has left the second management area; and transmission circuitry to transmit a second notification that the apparatus has entered the second management area, wherein the reception circuitry to receive receives a transmission on one of the first management area and the second management area based on which of the first notification and the second notification has been most recently transmitted.
The notification may be sent to at least one of the network device and another network device.
The receive circuitry for receiving may receive a transmission over the second management area when a notification that the apparatus has left the second management area has not been sent by the apparatus.
The apparatus may also include transmission circuitry to transmit a first dedicated preamble to the network, the first dedicated preamble associated with a terminal leaving the second management area.
The apparatus can also include transmission circuitry to transmit a second dedicated preamble associated with a terminal entering a second management area.
According to a twelfth aspect, there is provided a network apparatus comprising: receiving circuitry to receive at least one of a first notification and a second notification from a terminal in a reduced mode of operation, wherein the first notification indicates that the terminal is leaving a management area and the second notification indicates that the terminal has entered the management area; and notification circuitry for notifying a network device serving the terminal of the received notification type.
The network apparatus may further include: providing circuitry to provide a first preamble to a terminal, wherein the first preamble is a first notification; and providing circuitry for providing a second preamble to the terminal, wherein the second preamble is the second notification.
The notification circuitry for notifying the network device serving the terminal of the received notification may be an Xn interface or an X2 interface.
According to a thirteenth aspect, there is provided an apparatus configured to perform the actions of the above-described method.
According to a twelfth aspect, there is provided a computer program comprising program instructions for causing a computer to perform any of the methods described above.
According to a fourteenth aspect, there is provided a computer program product stored on a medium, the computer program product being operable to cause an apparatus to perform any of the methods as described herein.
According to a fifteenth aspect, there is provided an electronic device, which may comprise an apparatus as described herein.
According to a sixteenth aspect, there is provided a chipset, which may comprise an apparatus as described herein.
According to a seventeenth aspect, there is provided a non-transitory computer-readable medium comprising program instructions for causing a network apparatus to at least: configuring a first management area and a second management area for the terminal when the terminal is in a reduced operation mode, wherein the second management area comprises fewer access points than the first management area; selecting one of the first management area and the second management area for transmission to the terminal; and transmitting to the terminal using the selected management area.
The network device may be caused to: receiving a first notification that the terminal has left the second management area, wherein the network device may be caused to select the first management area based on the received first notification.
The network device may be caused to: receiving a second notification that the terminal has entered a second management area, wherein the network device may be caused to select the second management area based on the received second notification.
The network device may be caused to: receiving a first notification that the terminal has left the second management area; and receiving a second notification that the terminal has entered the second management area, wherein the network device may be caused to select one of the first management area and the second management area according to which of the first notification and the second notification has been received most recently.
The notification may be received from at least one of the user terminal and another network device.
The network apparatus may be caused to select the second management area when a notification about the terminal leaving the second management area is not received.
The network apparatus may be caused to transmit a first dedicated preamble to the terminal, the first dedicated preamble being associated with the terminal leaving the second management area.
The network apparatus may be caused to transmit a second dedicated preamble to the terminal, the second dedicated preamble being associated with the terminal entering the second management area.
According to an eighteenth aspect, there is provided a non-transitory computer-readable medium comprising program instructions for causing an apparatus to at least: receiving, from the network device, at least one configuration for configuring a first management area and a second management area when the device is in a reduced mode of operation, wherein the second management area includes fewer access points than the first management area; and receiving a transmission via the first management area or the second management area, wherein on which of the first management area and the second management area the transmission is received depends on the current location of the apparatus.
The network device may be caused to: a first notification that the device has left the second management area is sent, wherein the network device may be caused to receive a transmission over the first management area in response to the sent first notification.
The network device may be caused to: sending a second notification that the device has entered a second management area, wherein the network device may be caused to receive a transmission over the second management area in response to the transmitted second notification.
The network device may be caused to: sending a first notification that the apparatus has left the second management area; and transmitting a second notification that the device has entered the second management area, wherein the network device may be caused to receive transmissions on one of the first and second management areas depending on which of the first and second notifications has been most recently transmitted.
The notification may be sent to at least one of the network device and another network device.
The network device may be caused to receive a transmission over the second management area when a notification that the device left the second management area has not been sent by the device.
The network device may be caused to transmit a first dedicated preamble to the network, the first dedicated preamble being associated with a terminal leaving the second management area.
The network device may be caused to transmit a second dedicated preamble, the second dedicated preamble being associated with a terminal entering a second administrative area.
According to a nineteenth aspect, there is provided a non-transitory computer-readable medium comprising program instructions for causing a network apparatus to at least: receiving at least one of a first notification and a second notification from a terminal in a reduced operation mode, wherein the first notification indicates that the terminal is leaving a management area and the second notification indicates that the terminal has entered the management area; and notifying the network device serving the terminal of the received notification type.
The network apparatus may be further caused to: providing a first preamble to the terminal, wherein the first preamble is a first notification; and providing the terminal with a second preamble, wherein the second preamble is the second notification.
The network device may be caused to notify the network device serving the terminal of the received notification via the Xn interface or the X2 interface.
Drawings
Some examples will now be described in more detail, by way of example only, with reference to the following examples and the accompanying drawings, in which:
fig. 1 shows a schematic diagram of an example communication system comprising a plurality of base stations and a plurality of communication devices;
FIG. 2 shows a schematic diagram of an example terminal;
FIG. 3 shows a schematic diagram of an example network device;
figure 4 shows a signalling diagram between different elements in a communication system;
fig. 5 shows a flow diagram of possible operations of a network device, such as a last serving network node, according to an example;
fig. 6 shows a flow chart of possible operation of a terminal according to an example;
fig. 7 shows a schematic diagram of a communication system according to an example;
fig. 8 shows a signalling diagram between different elements in a communication system according to an example;
fig. 9 shows a signalling diagram between different elements in a communication system according to an example; and
fig. 10 illustrates a flow diagram of possible operations of a network device, such as a non-final serving network node, according to an example.
Detailed Description
In the following it is proposed to configure at least two management areas for a user equipment, wherein one management area has fewer access points than the other management area. The management area may be considered as an area in which the network manages the user equipment/terminals. The management area may include one or more cells. The user equipment/terminal may be configured to inform the network when it leaves and enters a management area with fewer access points.
In this case, the network may be configured to page the user equipment for data transmission or to send downlink data directly to the user equipment over the smaller of the at least two management areas until the user equipment informs the network that the user equipment has left the smaller management area.
In response to the user network informing the network that the user equipment has left the smaller management area, the network may be configured to page the user equipment for data transmission or to send downlink data directly to the user equipment over the larger of the two management areas. When the user equipment leaves both administrative areas, the network can follow the already established mechanisms to update the radio access network area. When the user equipment re-enters a smaller one of the management areas from the larger management area, the user equipment may send a notification to the network about this. In response to receipt of the notification, the network may be configured to use the smaller management area for paging purposes and/or for direct downlink data transmission purposes. Thus, based on the location update received from the user equipment, the network can restrict paging (possibly with data) to a smaller area, thereby saving resources in the communication system.
In the following, some illustrative examples are explained with reference to a wireless communication system serving device adapted for wireless communication. Before explaining examples in detail, certain general principles of a communication system, a communication apparatus, and a control device are briefly explained with reference to fig. 1 and 2 to help understand the technology on which the present disclosure is based.
In a wireless system, at least a part of the communication between at least two stations takes place over a wireless interface. Examples of wireless systems include Public Land Mobile Networks (PLMNs), satellite-based communication systems, and different wireless local area networks, such as Wireless Local Area Networks (WLANs). The local area network wireless network technology that allows devices to connect to a data network is known under the trade name Wi-Fi (or WiFi). Wi-Fi is often used synonymously with WLAN.
The wireless system may be divided into cells and is therefore commonly referred to as a cellular system. A user may access the communication system through a suitable communication device or terminal. The communication equipment of a user is often referred to as user equipment (communication equipment) or user equipment. The communication device is provided with suitable signal receiving and transmitting means for enabling communication, e.g. for enabling access to a communication network or direct communication with other users. A communication device may access a carrier provided by a station (e.g., a base station of a cell) and send and/or receive communications on the carrier.
A communication system and associated devices typically operate in accordance with a given standard or specification which sets out what the various entities associated with the system are permitted to do and how that should be achieved. Communication protocols and/or parameters for the connection are also typically defined. One example of a standardized communication system architecture is the Long Term Evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio access technology. LTE is being standardized by the third generation partnership project (3 GPP). LTE employs evolved universal terrestrial radio access network (E-UTRAN) access. Further developments of LTE are sometimes referred to as LTE-advanced (LTE-a). The various development stages of the 3GPP specifications are referred to as releases. In the present description, 3GPP releases are distinguished by the acronym "Rel-nn".
In addition to LTE evolution, 3GPP has also initiated a research project targeting a new generation of radio (5G), called New Radio (NR). NR does not require backward compatibility with LTE. Instead, it aims to achieve a tight interworking between RAT (radio access technology) and LTE. One goal of the NR research project is to identify and develop the technical components needed for New Radio (NR) systems to use any frequency band up to at least 100 GHz. The goal may be to implement a single technology framework to address the usage scenarios, requirements, and deployment scenarios defined in TR 38.913, for example. The new radio access technology may be forward compatible to allow specification in two separate phases (phase I and phase II).
In a wireless communication system 100 such as that shown in fig. 1, wireless access is provided to wireless communication devices (e.g., machine type communication, MTC, devices 102, 104, 105) via at least one base station or similar wireless transmitting and/or receiving wireless infrastructure node or point. Such a node may be, for example, a base station or enodeb (enb), or in a 5G system a next generation nodeb (gnb), or other wireless infrastructure node. These nodes are often referred to as base stations. The base stations are typically controlled by at least one suitable controller means to effect operation thereof and management of the mobile communications devices communicating with the base stations. The controller device may be located in a radio access network (e.g., the wireless communication system 100) or a Core Network (CN) (not shown) and may be implemented as one central device or its functions may be distributed over several devices. The controller device may be part of the base station and/or provided by a separate entity such as a radio network controller. In fig. 1, the control means 108 and 109 are shown as controlling the respective macro base stations 106 and 107. In some systems, the control means may additionally or alternatively be provided in the radio network controller. Other examples of radio access systems include systems provided by base stations of systems based on technologies such as 5G or new radio, Wireless Local Area Network (WLAN) and/or WiMax (worldwide interoperability for microwave access). A base station may provide coverage for an entire cell or similar radio service area.
In fig. 1, base stations 106 and 107 are shown connected to a broader communication network 113 via a gateway 112. Further gateway functionality may be provided to connect to another network.
Smaller base stations 116, 118 and 120 may also be connected to the network 113, for example through separate gateway functions and/or via controllers of macro-level stations. The base stations 116, 118, and 120 may be pico base stations or femto base stations, etc. In this example, stations 116 and 118 are connected via gateway 111, while station 120 is connected via controller device 108. In some examples, smaller stations may not be provided.
A possible wireless communication device will now be described in more detail with reference to fig. 2, which fig. 2 shows a schematic partial cross-sectional view of a communication device/terminal 200. Such communication devices are commonly referred to as endpoint devices. Any device capable of transmitting and receiving radio signals may provide a suitable communication device.
The communication device may be, for example, a mobile device, i.e. a device that is not fixed to a specific location, or it may be a fixed device. The communication devices may need to interact manually to communicate or may communicate without human interaction.
The communication device 200 may receive signals over the air or radio interface 207 via appropriate means for receiving and may transmit signals via appropriate means for transmitting radio signals. In fig. 2, the transceiver device is schematically designated by block 206. The transceiver device 206 may be provided, for example, by a radio and associated antenna arrangement. The antenna arrangement may be arranged inside or outside the wireless device.
A communication device is typically provided with at least one data processing entity 201, at least one memory 202 and possibly other components 203 for software and hardware assisted execution of tasks it is designed to perform, including access to and communication with access systems and other communication devices. The data processing, storage and other related control means may be provided on a suitable circuit board and/or chipset. This feature is denoted by reference numeral 204. Further, the wireless communication device may include appropriate connectors (wired or wireless) to other devices and/or for connecting external accessories. The communication devices 102, 104, 105 may access the communication system based on various access technologies.
An example of a wireless communication system is the architecture standardized by the third generation partnership project (3 GPP). The latest 3 GPP-based development is commonly referred to as Long Term Evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio access technology. The various development stages of the 3GPP specifications are referred to as releases. The latest development of LTE is commonly referred to as LTE-advanced (LTE-a). LTE employs a mobile architecture known as evolved universal terrestrial radio access network (E-UTRAN). The base stations of such systems are referred to as evolved or enhanced nodebs (enbs) and provide E-UTRAN features such as user plane packet data convergence/radio link control/medium access control/physical layer protocols (PDCP/RLC/MAC/PHY) and control plane Radio Resource Control (RRC) protocols that terminate at the communication device. Other examples of radio access systems include those provided by base stations of systems based on technologies such as Wireless Local Area Network (WLAN) and/or WiMax (worldwide interoperability for microwave access). A base station may provide coverage for an entire cell or similar radio service area.
Another example of a communication system is the 5G concept. The network architecture in 5G may be similar to that of LTE-advanced. The network architecture may vary depending on the need to support various radio technologies and better quality of service (QoS) support and some on-demand requirements for QoS levels to support quality of experience (QoE), e.g., from the perspective of the user. In addition, network-aware services and applications and service-and application-aware networks may introduce changes to the architecture. These are related to Information Centric Networking (ICN) and user centric content delivery networking (UC-CDN) approaches. The 5G may use Multiple Input Multiple Output (MIMO) antennas, many more base stations or nodes than LTE (the so-called small cell concept), including macro sites operating in cooperation with smaller base stations, and possibly also employ various radio technologies to obtain better coverage and higher data rates.
The base stations/access points in 5G may be referred to as the gbb.
An example network device for a 3GPP system is shown in fig. 3. Fig. 3 shows an example of a control apparatus 300 for a communication system, e.g. a station to be coupled to and/or for controlling an access system, such as a RAN node, e.g. a base station or (e) node B, or a node of a core network, such as an MME. The method may be implanted in a single control device or across more than one control device. The control means may be integrated with or external to a node or module of the core network or RAN. In some examples, the base station comprises a separate control device unit or module. In other examples, the control apparatus may be other network elements, such as a radio network controller or a spectrum controller. In some examples, each base station may have such a control device and a control device provided in the radio network controller. The control means 300 may be arranged to provide control of communications in the service area of the system. The control device 300 comprises at least one memory 301, at least one data processing unit 302, 303 and an input/output interface 304. Via which the control means can be coupled to the receiver and transmitter of the base station. The receivers and/or transmitters may be implemented as radio front ends or remote radio heads. For example, the control device 300 may be configured to execute appropriate software code to provide control functionality. The control device 300 may be included in a chipset or a modem device. The chipset or modem apparatus comprising the apparatus 300 may be comprised in a control node such as an eNB.
The 5G system is planned to be launched in the early twentieth century so that the extension of International Mobile Telecommunications (IMT) can go beyond the extension of IMT-2000 and IMT-advanced mobile broadband (MBB) services, and new services and use cases to be solved are realized.
The present specification discusses radio access network based notification Regions (RNA). RNA is a type of regulatory region, and comments herein regarding regulatory regions also apply to RNA. The RNA/management area is associated with a specific terminal/user equipment and defines a set of access points/cells. When the terminal moves into an area not covered by an access point/cell in the set, the terminal reports its location change to the network. When the terminal moves out of the area defined by the set, the terminal may be in a reduced mode of operation. For example, the terminal may be in a radio resource control INACTIVE state (RRC-INACTIVE) when the terminal moves out of the region defined by the set. In this state, the terminal can still maintain connection with the network in the connection management state, and can move within the RNA without notifying the network. Being in such a state may help reduce paging delays to the terminal and enable lightweight transitions between RRC-INACTIVE states and CONNECTED states, such as a radio resource control CONNECTED state (RRC-CONNECTED state).
The RNA concept is discussed in 3GPP TS 38.300 in chapter 9.2.2.3.
According to the present disclosure, a user equipment in RRC _ INACTIVE state may be configured with RNA by the last serving "NG-RAN" node. The term "NG-RAN" node is used to refer to a radio access network node operating according to the new radio system. They may refer to any of the gbb and LTE base stations that support 5G core network operations. As a final service 5G, the node configures the RNA for the user equipment, and the final service preserves the user equipment context and user equipment associated connections with the user equipment serving the core network entity, such as Access and Mobility Functions (AMF) and User Plane Functions (UPF).
The assigned RNA can cover a single or multiple cells and is contained within the core network registration area. The access points providing the cells in the RNA can be in direct contact with each other. This may be achieved, for example, by an Xn interface between two access points.
A radio access network based notification area update (RNAU) message may be sent periodically by the user equipment. The RNAU message may also be sent when the cell reselection procedure of the user equipment selects a cell that does not belong to the configured RNA (i.e., the user equipment moves outside of the configured RNA).
The RNA can be configured in any of a number of different ways. For example, the RNA may be configured by providing a cell list to the user equipment. The list may be an explicit list of one or more cells that include RNA.
As another example, a list of radio access network regions may be provided to the user equipment. This may be performed by providing the user equipment with at least one radio access network area identification, wherein the radio access network area is a subset of or equal to the core network tracking area. The radio access network may be specified by a single radio access network area identification, which may include a tracking area code and optionally a radio access network area code. Another way to achieve this is to have the cell broadcast one or more radio access network area identities in the system information.
The last serving node may provide different RNA definitions to different user equipments. However, the last serving node cannot mix different definitions for the same user equipment at the same time.
Fig. 4 shows possible signalling performed by different entities when the network triggers a transition from RRC _ INACTIVE mode to RRC _ CONNECTED mode at the user equipment.
At 401, the user equipment is in RRC _ INACTIVE CM-CONNECTED mode.
At 402, the last serving access point detects a radio access network paging trigger event. This may be, for example, information to be sent downlink to the user equipment. The information may be incoming downlink user plane information, downlink signaling from the 5G core, etc.
At 403, the last serving access point sends a radio access network paging message to all network access points included within the RNA region defined for the user equipment.
At 404, all network access points contacted at 403 attempt to page the user device. This may be performed using a temporary identifier of the user equipment, such as an inactive radio network temporary identifier (I-RNTI) in 5G.
At 405, it is assumed that the user equipment has been successfully contacted and the user equipment resumes connected mode operation, which includes access and use of mobility functions.
The inventors have realized that the above operation is relatively inflexible and wastes a lot of resources. This is because each access point in the configured RNA of the user equipment sends a paging message to the user equipment whenever a triggering event occurs. This may also delay downlink data transmission to the user equipment in a reduced power mode, such as an inactive mode.
Furthermore, the above-described techniques are particularly disadvantageous in the case of early data transmission. In this case, the downlink data is sent in the paging message itself, which increases the overhead of the paging transmission by the access point in the RNA.
In order to solve at least one of the above problems, it is proposed below to configure a user equipment with two RNAs, one of which has fewer access points than the other RNA. As described above, the RAN is a management area. The RNA may comprise one or more cells, and a set (plurality) of cells may be defined for a particular user equipment/terminal. The user device/terminal may be configured to notify the network when it leaves the RNA.
In this case, after initial setup/configuration of the two RNAs, the network may be configured to page the user equipment for data transmission or send downlink data directly to the user equipment on the smaller of the two RNAs until the user equipment notifies the network that the user equipment has left the smaller RNA.
In response to the user device notifying the network that the user device has left the smaller RNA, the network may be configured to page the user device for data transmission over the larger of the two RNAs. When the user equipment leaves both RNAs, the network may follow the already established mechanism to update the radio access network area. When the user device re-enters a smaller RNA from a larger one of the RNAs, the user device may send a notification to the network about this. In response to receipt of the notification, the network may be configured to use the smaller RNA for paging purposes or for direct downlink data transmission purposes. Thus, based on the location update received from the user equipment, the network can restrict paging (possibly with data) to a smaller area than before, thereby saving resources.
Example operations that may be performed by the network device in this case are described with reference to fig. 5.
At 501, a network device configures a first management area and a second management area for a terminal when the terminal is in a reduced mode of operation. The second management area includes fewer access points than the first management area. Further, the access points of the second management area are a subset of the access points of the first management area. This means that the second management area comprises a part of the access point of the first management area, wherein the part may be smaller than 1. It is to be appreciated that the second management area can include more than one access point (e.g., three cells can belong to one gNB).
The reduced mode of operation may be a radio resource control inactive state.
Configuration may be performed in a variety of ways. For example, according to the examples discussed above, the configuring may be performed by the network apparatus providing the user equipment with respective lists of cells for the first management area and the second management area. The configuring may be performed by the network device providing the user equipment with a respective list of radio access network areas. The provision in both cases may be performed by the network device.
The configuration of the first management area may be performed simultaneously with the configuration of the second management area or at a different time from the configuration of the second management area.
It is understood that there may be more than two configurations of RNA. However, if too many RNAs are configured, the proposed system may become less efficient as the user equipment sends more update notifications about its RNA to the network apparatus. Thus, the network apparatus may select the number of RNAs according to the mobility and/or estimated mobility of the user equipment.
At 502, the network device may select one of the first management area and the second management area for transmission to the terminal. The selection may be performed in accordance with the received notification. The notification may indicate whether the terminal has entered the second management area. The notification may indicate whether the terminal has left the second management area. Hereinafter, the received notification may be received from the terminal. The received notification may be received from another network device. For example, the received notification may be received from an access point, such as through an Xn/X2 connection. The selection may be performed when the terminal is transferred to an inactive state.
Examples of how a network device operates under different circumstances are provided below.
For example, the network device may receive a first notification that the terminal has left the second management area. In this case, the first management area will be selected according to the reception of the received first notification.
For example, the network device may receive a second notification that the terminal has entered the second management area. In this case, the second management area will be selected according to the reception of the second notification. It should be understood that the term "enter" herein includes "re-enter".
For example, the network apparatus may receive a first notification that the terminal has left the second management area, and may receive a second notification that the terminal has entered the second management area. In this case, the network device determines which of the notifications was most recently received, and selects one of the first management area and the second management area according to which of the first notification and the second notification has been most recently received (i.e., selects the first management area when the first notification is most recently received, and selects the second management area when the second notification is most recently received).
The network device may select the second management area when the notification about the terminal leaving the second management area is not received. This is because the terminal may default to the second management area when initially configured, and if no notification is sent, it may be considered that the terminal resides in the second management area after entering the inactive state.
The notification of the above-mentioned reception may be received directly from the user equipment. This may be achieved, for example, using respective dedicated preambles for entering and leaving the second management area. In this case, the respective dedicated preamble may be signaled by the network device to the terminal. For example, when the network device instructs the terminal to enter an inactive state, the corresponding dedicated preamble may be signaled by the network device to the terminal. The first management area configuration and the second management area configuration may also be provided by the network device to the terminal at this time.
The notification of the above-mentioned reception may be received indirectly from the user equipment. This may be achieved, for example, using respective dedicated preambles for entering and leaving the second management area, signaled between network devices ("other network devices") other than the network device performing the method. In this case, the respective dedicated preamble may be provided to the terminal by other network devices using, for example, a broadcast transmission, such as a system information block. After having received any dedicated preamble from the terminal, the other network device may signal the reception directly to the network device (e.g. using the Xn/X2 interface).
At 503, the network device may transmit to the terminal using the selected management area. This may be performed by the network device causing the access points in the selected management area to send messages/pages to the terminal or to send data directly to the terminal. The message/page may include data.
Fig. 6 illustrates some possible operations performed by the terminal described above.
At 601, the terminal may receive at least one configuration for configuring a first management area and a second management area from a network device while the device is in a reduced mode of operation. The second management area may include fewer access points than the first management area. The reduced mode of operation may be a radio resource control inactive state, as discussed above with respect to 501. The first management area and the second management area may also be as discussed above with respect to fig. 5.
Configuration may be performed in a variety of ways. For example, according to the examples discussed above, the configuring may be performed by the network apparatus providing the user equipment with respective lists of cells for the first management area and the second management area. The configuring may be performed by the network device providing the user equipment with a respective list of radio access network areas. The provisioning in both cases may be by the network device.
The configuration of the first management area may be performed simultaneously with the configuration of the second management area or at a different time from the configuration of the second management area.
It is understood that there may be more than two configurations of RNA. However, if too many RNAs are configured, the proposed system may become less efficient as the user equipment sends more update notifications about its RNA to the network apparatus. Thus, the network apparatus may select the number of RNAs according to the mobility and/or estimated mobility of the user equipment.
At 602, the terminal is configured to receive a transmission via one of a first management area and a second management area. The terminal may be configured to determine, based on its current location, through which of the first management area and the second management area it is configured to receive transmissions. The transmission may be received from an access point associated with the management area through which the transmission was received.
For example, the terminal may send a first notification that the terminal has left the second management area. The first notification may be sent directly and/or indirectly to a network device located in the second management area. The second notification may be indirectly transmitted to a network device within the second management area (e.g., a serving network device configuring the terminal in 601) by the terminal transmitting the second notification to the network device that is part of the first management area but not part of the second management area. The network device may then provide a notification (in original or modified form) to the network device located in the second management area using a direct connection, such as an X2 interface or an Xn interface. After the terminal transmits the first notification, a transmission received by the terminal is received on the first management area in response to the transmitted first notification.
For example, the terminal may send a second notification that the terminal has entered the second management area. The second notification may be sent directly and/or indirectly to a network device located in the second management area. The second notification may be sent indirectly to a network device within the second management area (e.g., a serving network device configuring the terminal in 601) by the terminal sending the second notification to the network device that is part of the first management area and not part of the second management area. The network device may then provide a notification (in original or modified form) to the network device located in the second management area using a direct connection, such as an X2 interface or an Xn interface. After the terminal sends the second notification, the terminal may receive a transmission on the second management area in response to the sent second notification. It should be appreciated that the transmission may be received over the first management area in response to the transmitted second notification.
For example, the terminal may send a first notification that the terminal has left the second management area. Further, the terminal may transmit a second notification that the terminal has entered the second management area. The transmission of the first notification and the second notification may be as described above. In this case, the terminal receives a transmission on one of the first management area and the second management area according to which of the first notification and the second notification has been transmitted recently (i.e., receives a transmission through the first management area when the first notification is transmitted recently and receives a transmission on the second management area when the second notification is transmitted recently).
For example, when a notification about entry and/or exit of the terminal from the second management area has not been sent by the apparatus, the transmission is received through the second management area, respectively.
In the above and in the following it should be understood that in case it is mentioned that a transmission is made/received on the second management area, a transmission may be made/received on the first management area, since the second management area is a subset of the first management area. This may be useful in case multiple leave/enter notifications are sent within a relatively short time frame (which may be defined by the operator operating the communication protocol and/or the communication network), which indicates that the terminal is at the border of the second management area.
Fig. 10 illustrates possible operations of a network device, such as a network device that is part of a first management area but not part of a second management area, as discussed above and below.
At 1001, a network device receives at least one of a first notification and a second notification from a terminal in a reduced operation mode, where the first notification indicates that the terminal is leaving a management area and the second notification indicates that the terminal has entered the management area.
The first notification may be a first preamble. The first preamble may have been previously provided to the terminal by the network apparatus. For example, the second preamble may already be provided in a system information block transmitted by the network apparatus. The first preamble may have been previously provided to the terminal by the serving network apparatus.
The second notification may be a second preamble. The second preamble may have been previously provided to the terminal by the network apparatus. For example, the second preamble may already be provided in a system information block transmitted by the network apparatus. The second preamble may have been previously provided to the terminal by the serving network apparatus.
At 1002, the network device notifies the network device serving the terminal of the received notification type. The network device may perform the notification using an Xn interface. The network device may perform this notification using the X2 interface.
Examples of networks of the above-described technology are discussed below with reference to the current new radio/5G specification. However, it should be understood that the techniques described below are not limited to such systems.
First, taking two RNAs as an example, consider how to configure more than one RNA for a user equipment in RRC _ INACTIVE state. It is understood that the configured RNAs may be more than two. However, if too many RNAs are configured, the proposed system may become less efficient as the user equipment sends more update notifications about its RNA to the network apparatus. Thus, the network apparatus may select the number of RNAs according to the mobility and/or estimated mobility of the user equipment.
This example is illustrated with respect to fig. 7.
Fig. 7 shows a user device 701 within a first RNA (RNA1) covering a large geographical area and a second RNA (RNA2) covering a smaller geographical area. RNA2 is completely contained in RNA 1. In the illustration, RNA1 and RNA2 are centered at the same position. However, it will be appreciated that this is not essential. Several gnbs are shown in RNA 1. One of these gnbs also resides in RNA 2. It will be appreciated that although reference is made below to a larger/smaller geographical area, the savings in resources result from a reduced number of paging access points/gnbs in smaller RNAs relative to larger RNAs. However, since the access point of RNA2 is a subset of the access point of RNA1, it is also useful from a conceptual point of view to consider RNA2 to be also geographically small.
In the current example, the first RNA (RNA1) may include several cells that may belong to several gnbs (e.g., regions of gNB1, gNB2, and all other gnbs in fig. 7). RNA2 is smaller in area than RNA1, RNA2 is part of RNA1, and RNA1 includes one or several cells belonging to a single gNB (e.g., the gNB2 region in fig. 7). The central gNB (gNB2) in fig. 7 is the only gNB in RNA2 and may be the last serving gNB that configures the user equipment from a CONNECTED state (e.g., RRC _ CONNECTED) to an INACTIVE state (e.g., RRC _ INACTIVE) in RNA 1.
The central gNB may be the gNB that configures the user equipment in an INACTIVE state (e.g., RRC _ INACTIVE) during radio area network based periodic notification area updates (RNAUs) in RNA 1.
The behavior of the network in this particular scenario may be as follows.
If the user equipment stays in RNA2 and RNA1, the gNB retaining the user equipment context (i.e., serving gNB2) when the user equipment is in an inactive state may quickly schedule downlink data transmissions to the user equipment. This may be performed by any of a number of different techniques.
For example, the serving gbb may transmit data to the user equipment via a physical downlink control channel using a cell-specific identifier of the user equipment. The cell-specific identifier may be a cell radio network temporary identifier (C-RNTI) when the slave user equipment is in a connected state. In other words, the serving gNB (gNB2) may transmit directly to the user equipment without paging.
As another example, the serving gbb may page the user equipment using a contention-based random access technique. The user equipment may monitor for pages following defined paging occasions and move to physical downlink control channel monitoring if the user equipment detects one of its identifiers in a paging occasion.
If the user device stays within RNA1 but outside of RNA2, the behavior of fig. 4 may be followed. In this case, the network may schedule downlink data transmission pages within the entire RNA1 to trigger contention-based random access by the user equipment to establish the radio resource control connection.
When the user device moves out of RNA2, the user device may inform the network that it is leaving RNA 2.
This may be performed by notifying a gNB (e.g., serving gNB, i.e., gNB2) belonging to both RNA2 and RNA 1. The following describes the potential behavior of such a gNB.
To inform the gNB that the user equipment is leaving the RNA2, the user equipment may initiate a random access channel access (RA) procedure using a dedicated preamble. The user equipment may send a first message to the gNB that includes the dedicated preamble and an identifier used during the inactive state, such as an inactive radio network temporary identifier (I-RNTI). The preamble may be stored in the user equipment context together with the associated validity period. The dedicated preamble may be configured by the user equipment by receiving dedicated signaling from the gNB when the gNB commands the user equipment to enter an INACTIVE state (e.g., RRC _ INACTIVE) from a CONNECTED state (e.g., RRC _ CONNECTED). The dedicated preamble may be broadcast by the gNB. For example, the dedicated preamble may be broadcast in the system information block of the gNB.
Upon receiving the dedicated preamble, the gNB may identify that the dedicated preamble was transmitted by the user equipment.
In this case, the gNB may reject the received first message and mark the end of the RNA indication procedure with this end of the random access procedure. The gNB may also or alternatively send a random access response to the user equipment to mark the RNA indicating the end of the procedure. This may be sent to limit excessive preamble transmissions. Among the gnbs included within RNA2, the user equipment is labeled "left RNA 2".
When the user equipment has received an indication that the RNA indication procedure has ended, the user equipment maintains its INACTIVE state (e.g., RRC _ INACTIVE) in the RNA1 region.
In this state, the user equipment may inform any gNB (e.g., gNB1 of fig. 7) belonging to RNA1 that it is now in RNA1 rather than in RNA 2.
For example, the user equipment may transmit a message including a dedicated preamble and an identifier, such as an inactive radio network temporary identifier (I-RNTI). The dedicated preamble may be configured by the user equipment using dedicated signaling. For example, dedicated signaling may be performed when the gNB commands the user equipment to enter an INACTIVE state (e.g., RRC _ INACTIVE) from a CONNECTED state (e.g., RRC _ CONNECTED), or by broadcasting this information in the system information block of the gNB. For the dedicated signaling case, the preamble may be reserved in all cells belonging to RNA 1.
When the dedicated preamble is identified, the gNB rejects MSG1 and ends the RA procedure. When RNA2 has left, the user equipment may remain in RRC _ INACTIVE in the RNA1 region.
The gNB (e.g., gNB1 in fig. 1) notifies the gNB belonging to RNA2 (e.g., gNB2 in fig. 7) of "left RNA 2". This may be performed via, for example, an Xn interface without the need to obtain the user device context.
The user equipment is labeled "left RNA 2" in the gNB belonging to RNA 2.
When/if the user device moves back to RNA2, the user device may inform the network that it is "entering" RNA 2.
This may have the same operation as the "leave" case discussed above. However, the dedicated preamble for "enter" may be different from the dedicated preamble for "leave". In this case, the user equipment and the network may reserve the dedicated preamble (along with any associated validity period (when used)) even if the user equipment leaves the RNA2 at some point. After the dedicated preamble for "incoming" is identified by the network, the user equipment may be marked as "incoming RNA 2" in the gNB belonging to RNA 2.
Additional examples are discussed with respect to fig. 8 and 9.
Fig. 8 is an example signaling diagram where the user equipment has a dedicated preamble for the leaving RNA2 from dedicated radio resource control signaling and informs the last serving gNB (gNB2 in fig. 7) that the user equipment is leaving RNA 2.
In this example, the last serving gNB commands the user equipment to enter an inactive state at 801. The command may be a radio resource control release message (rrcreelease). The command may include an identifier for the user equipment in inactive mode (such as I-RNTI), an RNA1 configuration, an RNA2 configuration, a dedicated preamble for leaving RNA2, and a dedicated preamble for entering RNA 2.
At 802, the user equipment is in an inactive state and makes signal measurements for at least one of the gNBs other than the last serving gNB and/or receives system information blocks from at least one other gNB.
At 803, based on the measurement and/or system information block, the user device decides to leave RNA2 but remain within RNA 1. The user equipment therefore sends a message to the last serving gNB, including a message for leaving RNA2 and an identifier for the user equipment in inactive mode.
At 804, the last serving eNB responds to the user equipment's message of 803 with an acknowledgement that the "leave" dedicated preamble was received. The last serving gNB then marks the user equipment locally as having left the RNA 2.
Fig. 9 is an example signaling diagram in which a user equipment has a dedicated preamble for a leaving RNA2 from a system information block of a gNB other than the serving gNB and informs the last serving gNB (gNB2 in fig. 7) that the user equipment is leaving RNA2 via another gNB.
In this example, the last serving gNB (gNB2 in fig. 7) commands the user equipment to enter an inactive state at 901. The command may be a radio resource control release (rrcreelease) message. The command may include an identifier for the user equipment in inactive mode (such as I-RNTI), an RNA1 configuration, and an RNA2 configuration. Thus, this example differs from fig. 8 in that the last serving gNB does not provide the user equipment with a dedicated preamble for entering or leaving RNA 2.
At 902, the user equipment is in an inactive state and receives system information blocks for the gNB except for a last serving gNB. The system information block may be received after cell reselection is initiated. At least one of these system information blocks may include a dedicated preamble for the exiting RNA2 and a dedicated preamble for the entering RNA 2.
At 904, the user device decides to leave RNA2 but remain within RNA 1. In this case, the user equipment sends a message to at least one of the other gnbs to achieve this effect, the message including a message for leaving RNA2 and an identifier of the user equipment for inactive mode.
At 905, the other gNB responds to the user equipment's message of 903 with an acknowledgement that the "leave" dedicated preamble was received.
At 906, the other gNB sends a direct message (e.g., using an Xn/X2 interface) to the last serving gNB informing the last serving gNB that the user equipment has left the RNA 2. In response to this message, the last serving gNB locally marks the user equipment as having left the RNA 2.
It should be understood that the term "terminal" throughout the above may include a terminal that does not have a user access to the communication network, such as a terminal that performs machine-to-machine communication with the network, in addition to and/or in the alternative to a terminal (e.g., user equipment) used by the user to access the communication network.
In the above, it will be understood that reference to a "cell" refers to the coverage area provided by the access point to the network. Thus, a measurement performed on a cell may refer to a measurement performed on at least one carrier provided by or otherwise accessible in the cell.
The required data processing means and functions may be provided by one or more data processors. The described functionality may be provided by separate processors or by an integrated processor. The data processor may be of any type suitable to the local technical environment, and may include, by way of non-limiting example, one or more of the following: general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs), application specific integrated circuits (asics), gate level circuits, and processors based on a multi-core processor architecture. The data processing may be distributed over several data processing modules. The data processor may be provided by, for example, at least one chip. An appropriate storage capacity can be provided in the relevant device. The memory or memories may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory. One or more of the steps discussed with respect to fig. 6 and/or fig. 7 may be performed by one or more processors in conjunction with one or more memories.
A suitably adapted computer program code product may be used for implementing the examples when loaded or otherwise provided on a suitable data processing apparatus. The program code product for providing the operation may be stored on, provided or embodied by a suitable carrier medium. A suitable computer program may be embodied on a computer readable recording medium. One possibility is to download the program code product via a data network. In general, the various examples may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. The above examples may therefore be practiced in various components such as integrated circuit modules. The design of integrated circuits is by and large a highly automated process. Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.
It should be noted that although examples have been described with respect to certain architectures, similar principles may be applied to other systems. Thus, although certain examples are described above by way of example with reference to certain example architectures for wireless networks, technologies and standards, the examples may be applied to any other suitable form of communication system than those shown and described herein. It should also be noted that different combinations of the different examples are possible. It should also be noted herein that while the above describes examples, there are several variations and modifications which may be made to the disclosed solution without departing from the scope of the present application.

Claims (23)

1. A network apparatus, comprising:
means for configuring a first management area and a second management area for a terminal when the terminal is in a reduced mode of operation, wherein the second management area includes fewer access points than the first management area;
means for selecting one of the first management area and the second management area for transmission to the terminal; and
means for transmitting to the terminal using the selected management region.
2. The network device of claim 1, further comprising:
means for receiving a first notification that the terminal has left the second management area,
wherein the means for selecting selects the first management area based on the received first notification.
3. The network device of claim 1, further comprising:
means for receiving a second notification that the terminal has entered the second management area,
wherein the means for selecting selects the second management area according to the received second notification.
4. The network device of claim 1, further comprising:
means for receiving a first notification that the terminal has left the second management area; and
means for receiving a second notification that the terminal has entered the second management area,
wherein the means for selecting selects one of the first management area and the second management area according to which of the first notification and the second notification has been received recently.
5. The network device of any of claims 2-4, wherein the notification is received from at least one of a user terminal and another network device.
6. A network apparatus according to any preceding claim, wherein the means for selecting selects the second management area when a notification that the terminal left the second management area is not received.
7. Network apparatus according to any preceding claim, comprising means for sending a first dedicated preamble to the terminal, the first dedicated preamble being associated with the terminal leaving the second management area.
8. Network apparatus according to any preceding claim, comprising means for sending a second dedicated preamble to the terminal, the second dedicated preamble being associated with the terminal entering the second management area.
9. An apparatus, comprising:
means for receiving, from a network device while the device is in a reduced mode of operation, at least one configuration for configuring a first management area and a second management area, wherein the second management area includes fewer access points than the first management area; and
means for receiving a transmission via the first management area or the second management area, wherein on which of the first management area and the second management area the transmission is received depends on a current location of the apparatus.
10. The apparatus of claim 9, further comprising:
means for sending a first notification that the apparatus has left the second management area,
wherein the means for receiving receives a transmission over the first management area in response to the sent first notification.
11. The apparatus of claim 9, further comprising:
means for sending a second notification that the apparatus has entered the second management area,
wherein the means for receiving receives a transmission over the second management area in response to the sent second notification.
12. The apparatus of claim 9, further comprising:
means for sending a first notification that the apparatus has left the second management area; and
means for sending a second notification that the apparatus has entered the second management area,
wherein the means for receiving receives a transmission on one of the first management area and the second management area depending on which of the first notification and the second notification has been sent most recently.
13. The device of any of claims 10-12, wherein the notification is sent to at least one of the network device and another network device.
14. The apparatus according to any of claims 9 to 13, wherein the means for receiving receives a transmission on the second management area when a notification about the apparatus leaving the second management area has not been sent by the apparatus.
15. The apparatus according to any of claims 9 to 14, comprising means for sending a first dedicated preamble to the network, the first dedicated preamble being associated with the terminal leaving the second management area.
16. The apparatus according to any of claims 9 to 15, comprising means for sending a second dedicated preamble associated with the terminal entering the second management area.
17. A network apparatus, comprising:
means for receiving at least one of a first notification and a second notification from a terminal in a reduced mode of operation, wherein the first notification indicates that the terminal is leaving a management area and the second notification indicates that the terminal has entered the management area; and
means for notifying a network device serving the terminal of the received notification type.
18. The network device of claim 17, further comprising:
means for providing a first preamble to the terminal, wherein the first preamble is the first notification; and
means for providing a second preamble to the terminal, wherein the second preamble is the second notification.
19. The network device according to any of claims 17 to 18, wherein the means for notifying a network device serving the terminal of the received notification is an Xn interface or an X2 interface.
20. A method for a network device, the method comprising:
configuring a first management area and a second management area for a terminal when the terminal is in a reduced mode of operation, wherein the second management area includes fewer access points than the first management area;
selecting one of the first management area and the second management area for transmission to the terminal; and
and transmitting to the terminal by using the selected management area.
21. A method for an apparatus, the method comprising:
receiving, from a network device, at least one configuration for configuring a first management area and a second management area when the device is in a reduced mode of operation, wherein the second management area includes fewer access points than the first management area; and
receiving a transmission via the first management area or the second management area, wherein on which of the first management area and the second management area the transmission is received depends on a current location of the apparatus.
22. A method for a network device, the method comprising:
receiving at least one of a first notification and a second notification from a terminal in a reduced operation mode, wherein the first notification indicates that the terminal is leaving a management area and the second notification indicates that the terminal has entered the management area; and
notifying a network device serving the terminal of the received notification type.
23. A computer program product comprising computer code which, when executed by at least one processor of an apparatus, causes the apparatus to perform the steps of any of claims 20 or 21 or 22.
CN201980098146.5A 2019-07-02 2019-07-02 Communication system Pending CN114041297A (en)

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