US-12621754-B2 - Inter-radio access technology (RAT)

US12621754B2US 12621754 B2US12621754 B2US 12621754B2US-12621754-B2

Abstract

Techniques are described for facilitating an inter-Radio Access Technology (RAT) selection or measurement process for a dual-mode or a multi-mode device. For example, a wireless communication method includes a network node transmitting to a communication node a system information block (SIB) that includes information about Radio Access Technologies (RATs). The information includes any one or more of a first carrier priority value and a first threshold value of a serving frequency associated with a RAT, a second carrier priority value and a second threshold value of a serving cell associated with the RAT, an indicator to indicate existence of one or more additional RATs, carrier information for the one or more additional RATs, and access information to access the one or more additional RATs.

Inventors

Ting Lu
Bo Dai
Xiubin Sha

Assignees

ZTE CORPORATION

Dates

Publication Date: 20260505
Application Date: 20230106

Claims (8)

1 . A wireless communication method, comprising: transmitting, by a network node, a system information block (SIB) that includes information about a plurality of Radio Access Technologies (RATs), wherein the information includes an indicator to indicate existence of one or more additional RATs, and carrier information for the one or more additional RATs, wherein the carrier information is included in a carrier list that includes a plurality of frequencies, wherein the carrier list further includes one timer to evaluate the plurality of frequencies for both an inter-RAT cell selection process and re-selection measurement process in response to a quality of a serving cell associated with a RAT being lower than a threshold value, wherein the carrier list is included in a container list, wherein each item in the container list relates to one RAT, and wherein the information further includes access information to access the one or more additional RATs.
2 . The method of claim 1 , wherein the RAT and the one or more additional RATs includes Narrowband Internet-of-Things (NB-IoT) technology, Global System for Mobile communications (GSM) Enhanced data rates for GSM evolution Radio Access Network (GERAN) technology, enhanced Machine-Type Communication (eMTC) technology, or Long Term Evolution (LTE) technology.
3 . A wireless communication method, comprising: receiving, by a communication node, a system information block (SIB) that includes information about a plurality of Radio Access Technologies (RATs), wherein the information includes an indicator to indicate existence of one or more additional RATs, and carrier information for the one or more additional RATs, wherein the carrier information is included in a carrier list that includes a plurality of frequencies, wherein the carrier list further includes one timer to evaluate the plurality of frequencies for both an inter-RAT cell selection process and re-selection measurement process in response to a quality of a serving cell associated with a RAT being lower than a threshold value, wherein the carrier list is included in a container list, wherein each item in the container list relates to one RAT, and wherein the information further includes access information to access the one or more additional RATs; and upon determining that a quality of the serving cell is lower than the threshold value: starting the one timer, and evaluating, while the one timer is running, the plurality of frequencies as part of the inter-RAT cell selection process or the re-selection measurement process.
4 . The method of claim 3 , wherein the RAT and the one or more additional RATs includes Narrowband Internet-of-Things (NB-IoT) technology, Global System for Mobile communications (GSM) Enhanced data rates for GSM evolution Radio Access Network (GERAN) technology, enhanced Machine-Type Communication (eMTC) technology, or Long Term Evolution (LTE) technology.
5 . A wireless communication apparatus, comprising at least one processor that is configured to perform a method that causes the wireless communication apparatus to: transmit, by a network node, a system information block (SIB) that includes information about a plurality of Radio Access Technologies (RATs), wherein the information includes an indicator to indicate existence of one or more additional RATs, and carrier information for the one or more additional RATs, wherein the carrier information is included in a carrier list that includes a plurality of frequencies, wherein the carrier list further includes one timer to evaluate the plurality of frequencies for both an inter-RAT cell selection process and re-selection measurement process in response to a quality of a serving cell associated with a RAT being lower than a threshold value, wherein the carrier list is included in a container list, wherein each item in the container list relates to one RAT, and wherein the information further includes access information to access the one or more additional RATs.
6 . The wireless communication apparatus of claim 5 , wherein the RAT and the one or more additional RATs includes Narrowband Internet-of-Things (NB-IoT) technology, Global System for Mobile communications (GSM) Enhanced data rates for GSM evolution Radio Access Network (GERAN) technology, enhanced Machine-Type Communication (eMTC) technology, or Long Term Evolution (LTE) technology.
7 . A wireless communication apparatus, comprising at least one processor that is configured to perform a method that causes the wireless communication apparatus to: receive a system information block (SIB) that includes information about a plurality of Radio Access Technologies (RATs), wherein the information includes an indicator to indicate existence of one or more additional RATs, and carrier information for the one or more additional RATs, wherein the carrier information is included in a carrier list that includes a plurality of frequencies, wherein the carrier list further includes one timer to evaluate the plurality of frequencies for both an inter-RAT cell selection process and re-selection measurement process in response to a quality of a serving cell associated with a RAT being lower than a threshold value, wherein the carrier list is included in a container list, wherein each item in the container list relates to one RAT, and wherein the information further includes access information to access the one or more additional RATs; and upon determining that a quality of the serving cell is lower than the threshold value; start the one timer, and evaluate, while the one timer is running, the plurality of frequencies as part of the inter-RAT cell selection process or the re-selection measurement process.
8 . The wireless communication apparatus of claim 7 , wherein the RAT and the one or more additional RATs includes Narrowband Internet-of-Things (NB-IoT) technology, Global System for Mobile communications (GSM) Enhanced data rates for GSM evolution Radio Access Network (GERAN) technology, enhanced Machine-Type Communication (eMTC) technology, or Long Term Evolution (LTE) technology.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. application Ser. No. 17/268,384, filed Feb. 12, 2021, which is a U.S. national stage application of International Patent Application No. PCT/CN2018/108137, filed on Sep. 27, 2018, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD This disclosure is directed generally to digital wireless communications. BACKGROUND Mobile telecommunication technologies are moving the world toward an increasingly connected and networked society. In comparison with the existing wireless networks, next generation systems and wireless communication techniques will need to support a much wider range of use-case characteristics and provide a more complex and sophisticated range of access requirements and flexibilities. Long-Term Evolution (LTE) is a standard for wireless communication for mobile devices and data terminals developed by 3rd Generation Partnership Project (3GPP). LTE Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The 5th generation of wireless system, known as 5G, advances the LTE and LTE-A wireless standards and is committed to supporting higher data-rates, large number of connections, ultra-low latency, high reliability and other emerging business needs. SUMMARY Techniques are disclosed for inter-Radio Access Technology (RAT) measurement, cell selection, or cell re-selection. A first exemplary embodiment discloses a wireless communication method, comprising transmitting, by a network node, a system information block (SIB) that includes information about a plurality of Radio Access Technologies (RATs). The information includes any one or more of: a first carrier priority value and a first threshold value of a serving frequency associated with a RAT, a second carrier priority value and a second threshold value of a serving cell associated with the RAT, an indicator to indicate existence of one or more additional RATs, carrier information for the one or more additional RATs, and access information to access the one or more additional RATs. A second exemplary embodiment discloses a wireless communication method, comprising receiving, by a communication node, a system information block (SIB) that includes information about a plurality of Radio Access Technologies (RATs). The information includes any one or more of: a first carrier priority value and a first threshold value of a serving frequency associated with a RAT, a second carrier priority value and a second threshold value of a serving cell associated with the RAT, an indicator to indicate existence of one or more additional RATs, carrier information for the one or more additional RATs, and access information to access the one or more additional RATs. In some implementations of the first and second exemplary embodiments, the indicator includes a simple indicator, a bitmap-type indicator, or a list of one or more indicators. In some implementations of the first and second exemplary embodiments, the carrier information is included in a carrier list that includes one or more frequencies, one or more priority values associated with the one or more frequencies or the one or more additional RATs, one or more carrier frequency or cell radio quality thresholds, or one or more timers. In some implementations of the first and second exemplary embodiments, the carrier list is included in a container list, where each item in the container list relates to one RAT. In some implementations of the first and second exemplary embodiments, the access information includes a system information message for at least one RAT. In some implementations of the first and second exemplary embodiments, the RAT and the one or more additional RATs includes Narrowband Internet-of-Things (NB-IoT) technology, Global System for Mobile communications (GSM) Enhanced data rates for GSM evolution Radio Access Network (GERAN) technology, enhanced Machine-Type Communication (eMTC) technology, Long Term Evolution (LTE) technology, or Fifth Generation New Radio (5G NR) technology. A third exemplary embodiment discloses a wireless communication method, comprising: triggering, by a communication node, an inter-Radio Access Technology (RAT) cell selection or reselection process, and selecting, after the triggering, a frequency or a RAT to communicate with a second cell. The frequency is selected from one or more frequencies previously accessed by the communication node or wherein the RAT is selected from one or more RATs previously accessed by the communication node. In some implementations of the third exemplary embodiment, the one or more frequencies are associated with one or more priority values determined based on an evaluation of service of one or more cells. In some implementations of the third exemplary embodiment, the frequency has a highest priority among the one or more priority values associated with the one or more frequencies. In some i