CN-116548062-B - Enhanced apparatus and method for cell reconnection of a client node in a non-terrestrial network

CN116548062BCN 116548062 BCN116548062 BCN 116548062BCN-116548062-B

Abstract

Example embodiments provide signaling between a network node and a client node in a non-terrestrial network that supports optimizing energy consumption of the client node. The client node may adjust its power save mode duration to end at the appropriate time for transmission based on the information about the transmission opportunity calculated by the network node. The network node may be a mobile network node operating at high altitude, such as a satellite. Apparatus, methods, and computer programs are disclosed.

Inventors

S. Hope
J. Wigard

Assignees

诺基亚技术有限公司

Dates

Publication Date: 20260512
Application Date: 20211117
Priority Date: 20201202

Claims (9)

1. A client node, comprising: at least one processor, and At least one memory including computer program code; the at least one memory and the computer code are configured to, with the at least one processor, cause at least the client node to: Receiving information from a network node, the information comprising an indication of at least one transmission opportunity based on at least one scheduled transmission time of the client node, the client node comprising an internet of things device configured to alternately operate in a power saving mode and an active mode, wherein the at least one scheduled transmission time comprises a next transmission time, a next transmission time window or a transmission time interval of the client node for transmitting data, the client node being in the active mode within the next transmission time, next transmission time window or transmission time interval, and A duration of a power saving mode of the client node is determined based on the at least one transmission opportunity, Wherein the at least one transmission opportunity is calculated based on network availability for the client node, the at least one scheduled transmission time, and information to assist in reconnecting the client node after a power save mode, Wherein the assistance information comprises parameters for reconnection, wherein the parameters comprise at least one of a physical cell identity, a network availability time, a random access control channel opportunity or a random access control channel preamble, and wherein the network availability time comprises an indication of a most suitable time for the transmission by the client node, Wherein the assistance information is calculated based on the location of the client node, ephemeris data associated with the network node, and the time of the requested transmission opportunity.
2. The client node of claim 1, wherein the at least one memory and the computer code are further configured to, with the at least one processor, cause the client node to: A query is sent to the network node for a transmission opportunity based on the at least one scheduled transmission time of the client node, the at least one scheduled transmission time of the client node being indicated in the query.
3. An apparatus for communication, the apparatus hosted on a satellite in a non-terrestrial communication network, comprising: at least one processor, and At least one memory including computer program code; the at least one memory and the computer code are configured to, with the at least one processor, at least cause the apparatus to: Obtaining at least one scheduled transmission time of a client node, the client node comprising an internet of things device configured to alternately operate in a power saving mode and an active mode, wherein the at least one scheduled transmission time comprises a next transmission time, a next transmission time window, or a transmission time interval of the client node for transmitting data, within which the client node is in the active mode; Calculating at least one transmission opportunity for the client node based on network availability for the client node, the at least one scheduled transmission time, and information for assisting the client node in reconnecting after a power save mode, Wherein the assistance information comprises parameters for reconnection, wherein the parameters comprise at least one of a physical cell identity, a network availability time, a random access control channel opportunity or a random access control channel preamble, and wherein the network availability time comprises an indication of a most suitable time for the transmission by the client node, Wherein the assistance information is calculated based on the position of the client node, ephemeris data associated with the network node, and the time of the requested transmission opportunity, and Information is sent to the client node, the information comprising an indication of the at least one transmission opportunity.
4. The apparatus of claim 3, wherein the at least one scheduled transmission time is obtained based on a query from the client node for the transmission opportunity, the at least one scheduled transmission time comprising a next transmission time, a next transmission time period, or a transmission time interval of the client node.
5. The apparatus of claim 3, wherein the at least one scheduled transmission time is obtained based on a time period between previous transmission times of the client node.
6. The apparatus according to any of claims 3 to 5, wherein the at least one memory and the computer code are further configured to, with the at least one processor, cause the apparatus to: Calculating auxiliary parameters associated with the transmission opportunity for reconnection by the client node, and Wherein the information includes the parameter.
7. The apparatus according to any of claims 3 to 5, wherein the at least one memory and the computer code are further configured to, with the at least one processor, cause the apparatus to: The at least one transmission opportunity is reserved to the client node.
8. A method of communication, comprising: A client node receiving information from a network node, the information comprising an indication of at least one transmission opportunity based on at least one scheduled transmission time of the client node, the client node comprising an internet of things device configured to alternately operate in a power save mode and an active mode, wherein the at least one scheduled transmission time comprises a next transmission time, a next transmission time window or a transmission time interval of the client node for transmitting data, the client node being in the active mode within the next transmission time, next transmission time window or transmission time interval, and A duration of a power saving mode of the client node is determined based on the at least one transmission opportunity, Wherein the at least one transmission opportunity is calculated based on network availability for the client node, the at least one scheduled transmission time, and information to assist in reconnecting the client node after a power save mode, Wherein the assistance information comprises parameters for reconnection, wherein the parameters comprise at least one of a physical cell identity, a network availability time, a random access control channel opportunity or a random access control channel preamble, and wherein the network availability time comprises an indication of a most suitable time for the transmission by the client node, Wherein the assistance information is calculated based on the location of the client node, ephemeris data associated with the network node, and the time of the requested transmission opportunity.
9. A method of communication performed by an apparatus hosted on a satellite in a non-terrestrial communication network, comprising: obtaining at least one scheduled transmission time of a client node, the client node comprising an internet of things device configured to alternately operate in a power saving mode and an active mode, wherein the at least one scheduled transmission time comprises a next transmission time, a next transmission time window or a transmission time interval of the client node for transmitting data, the client node being in the active mode within the next transmission time, next transmission time window or transmission time interval, calculating at least one transmission opportunity for the client node based on network availability for the client node, the at least one scheduled transmission time, and information for assisting the client node to reconnect after power saving mode, Wherein the assistance information comprises parameters for reconnection, wherein the parameters comprise at least one of a physical cell identity, a network availability time, a random access control channel opportunity or a random access control channel preamble, and wherein the network availability time comprises an indication of a most suitable time for the transmission by the client node, Wherein the assistance information is calculated based on the position of the client node, ephemeris data associated with the network node, and the time of the requested transmission opportunity, and Information is sent to the client node, the information comprising an indication of the at least one transmission opportunity.

Description

Enhanced apparatus and method for cell reconnection of a client node in a non-terrestrial network Technical Field The present application relates generally to wireless communication systems. In particular, some example embodiments of the application relate to enhancements for cell reconnection of a client node, such as an internet of things (IoT) device, in a non-terrestrial network. Background Solutions for New Radio (NR) support of non-terrestrial networks (NTNs) are needed. In this case, NTN includes all networks or network segments that use an on-board or satellite-borne platform as part of a network, such as a satellite, an aerial platform, such as a balloon, an airplane, or an unmanned aerial vehicle. The drone may be any unmanned aircraft that may be navigated autonomously by a human, remotely or outside the line of sight, without human control. Satellites may be classified according to their altitude from Low Earth Orbit (LEO) satellites to geostationary orbit (GEO) satellites. LEO satellites are deployed in large constellations and move relative to the earth's surface. An advantage of this is low-latency global high-speed communications compared to conventional geostationary orbit (GEO) satellites. The movement of LEO satellites relative to the earth is one of the main challenges of LEO communications. Disclosure of Invention This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. Example embodiments may optimize power consumption of an electronic device. The client node may be configured to query the network for transmission opportunities for adjusting the power saving mode of the client node based on the time of the transmission opportunities. Alternatively, the network may automatically notify the client node of the transmission opportunity based on the scheduled transmission time of the client node known to the network. This allows the client node to extend or shorten the set power save time so that the client node activates for transmission at the appropriate transmission time. The appropriate transmission time may be based on network availability of the client node as determined by the network. Thus, battery power may be conserved because the client node may be prevented from activating prematurely and must wait for a transmission opportunity. In addition, additional information may be provided to the client node having the transmission opportunity to reduce the overhead of reconnecting after the power save mode. This may be achieved by the features of the independent claims. Further embodiments are provided in the dependent claims, the description and the drawings. According to a first aspect, an apparatus may include at least one processor and at least one memory including computer program code, the at least one memory and the computer code configured to, with the at least one processor, at least cause the apparatus to receive information from a network node, the information including an indication of at least one transmission opportunity based on at least one scheduled transmission time of the apparatus, and determine a duration of a power saving mode of the apparatus based on the at least one transmission opportunity. According to an example embodiment of the first aspect, the at least one memory and the computer code may be further configured to, with the at least one processor, cause the apparatus to send a query to the network node for transmission opportunities based on at least one scheduled transmission time of the apparatus, the at least one scheduled transmission time of the apparatus being indicated in the query. According to an example embodiment of the first aspect, the information may comprise an auxiliary parameter associated with at least one transmission opportunity for reconnecting after the power saving mode. According to an example embodiment of the first aspect, the assistance parameter may comprise at least one of a physical cell identity, a network availability time, a random access control channel opportunity or a random access control channel preamble. According to an example embodiment of the first aspect, the available time may comprise an indication of the most suitable time or time slot for transmission by the apparatus. According to an example embodiment of the first aspect, the at least one scheduled transmission time may comprise a next transmission time, a next transmission time window or a transmission time interval of the apparatus for transmitting data. According to a second aspect, an apparatus may include at least one processor, and at least one memory including computer program code, the at least one memory and the computer code configured to, with the at least one processor, at le