CN111264070B - Reporting user equipment capability under multiple network connections - Google Patents
Reporting user equipment capability under multiple network connections Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
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- 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
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Abstract
Methods, systems, and devices are disclosed that relate to digital wireless communications, and more particularly to techniques for reporting User Equipment (UE) capabilities when the UE is connected to multiple network nodes. In one exemplary aspect, a method for wireless communication includes: a first message is received at the wireless device from a communication node operating using a first radio access technology, the first message configured to query the wireless device for capabilities of the first radio access technology. The method also includes transmitting, from the wireless device to the communication node, a second message indicating capability information of the wireless device in response to the first message, the capability information including capabilities for the first radio access technology and additional capabilities for the second radio access technology.
Description
Technical Field
This patent document relates generally to digital wireless communications.
Background
Mobile communication technology is pushing the world to an increasingly interconnected and networked society. Rapid developments and technological advances in mobile communications have led to greater demands for capacity and connectivity. Other aspects of energy consumption, equipment cost, spectral efficiency, and latency are also important in order to meet the needs of various communication scenarios. Various techniques are being discussed, including new methods of providing higher quality of service.
Disclosure of Invention
Methods, systems, and devices related to digital wireless communications are disclosed herein, and more particularly, to techniques related to reporting a User Equipment (UE) capability when connected to multiple network nodes.
In one exemplary aspect, a method for wireless communication is disclosed. The method comprises the following steps: at a wireless device, receiving a first message from a communication node operating using a first radio access technology, the first message configured to query the wireless device for capabilities of the first radio access technology; and transmitting, from the wireless device to the communication node, a second message indicating capability information of the wireless device in response to the first message, the capability information including capabilities for the first radio access technology and additional capabilities for the second radio access technology.
In some embodiments, the first message is configured to query the wireless device for capabilities for a plurality of radio access technologies including at least the first radio access technology and the second radio access technology.
In some embodiments, the capability information of the wireless device includes a capability of a frequency band of a second radio access technology that the wireless device is capable of operating, and the frequency band of the second radio access technology is configured to cooperate with the frequency band of the first radio access technology. In some embodiments, the capability information of the wireless device includes capabilities of a combination of frequency bands that the wireless device is capable of operating, and each combination of frequency bands indicates a frequency band of a second radio access technology configured to cooperate with the frequency band of the first radio access technology.
In some embodiments, the first message includes one or more frequency bands of a first radio access technology that the communication node is capable of operating. In some embodiments, the first message includes one or more frequency band combinations operable by the communication node, wherein each of the one or more frequency combinations indicates a frequency band of a second radio access technology configured to cooperate with the frequency band of the first radio access technology.
In some embodiments, the capability information of the wireless device includes one or more frequency bands of a second radio access technology that the wireless device is capable of operating, and the one or more frequency bands of the second radio access technology are configured to cooperate with the one or more frequency bands of the first radio access technology indicated by the first message. In some embodiments, the capability information of the wireless device includes one or more band combinations that the wireless device is capable of operating, and each of the one or more band combinations indicates a band of a second radio access technology configured to cooperate with a band of the first radio access technology indicated by the first message.
In some embodiments, the first message includes one or more frequency bands of the second radio access technology, and the capability information of the wireless device includes capabilities of the one or more frequency bands of the second radio access technology indicated in the first message. In some embodiments, the first message comprises one or more frequency band combinations operable by the communication node, each of the one or more frequency band combinations indicating a frequency band of a second radio access technology configured to cooperate with the frequency band of the first radio access technology, and the capability information comprises a capability of the one or more frequency band combinations indicated in the first message.
In another exemplary aspect, a method for wireless communication is disclosed. The method comprises the following steps: transmitting a first message from a communication node operating using a first radio access technology to a wireless device, the first message configured to query the wireless device for capabilities of the first radio access technology; and receiving, at the communication node, a second message indicating capability information of the wireless device from the wireless device in response to the first message, the capability information including capabilities for the first radio access technology and additional capabilities for the second radio access technology.
In some embodiments, the first message is configured to query the wireless device for capabilities for a plurality of radio access technologies including at least a first radio access technology and a second radio access technology.
In some embodiments, the capability information of the wireless device includes a capability of a frequency band of a second radio access technology that the wireless device is capable of operating, and the frequency band of the second radio access technology is configured to cooperate with the frequency band of the first radio access technology. In some embodiments, the capability information of the wireless device includes capabilities of a combination of frequency bands that the wireless device is capable of operating, and each combination of frequency bands indicates a frequency band of a second radio access technology configured to cooperate with the frequency band of the first radio access technology.
In some embodiments, the first message includes one or more frequency bands of a first radio access technology that the communication node is capable of operating. In some embodiments, the first message comprises one or more frequency band combinations operable by the communication node, wherein each of the one or more frequency combinations indicates a frequency band of a second radio access technology configured to cooperate with the frequency band of the first radio access technology.
In some embodiments, the capability information of the wireless device includes one or more frequency bands of a second radio access technology that the wireless device is capable of operating, and the one or more frequency bands of the second radio access technology are configured to cooperate with the one or more frequency bands of the first radio access technology indicated by the first message. In some embodiments, the capability information of the wireless device includes one or more band combinations that the wireless device is capable of operating, and each of the one or more band combinations indicates a band of a second radio access technology configured to cooperate with a band of the first radio access technology indicated by the first message.
In some embodiments, the first message includes one or more frequency bands of the second radio access technology, and the capability information of the wireless device includes capabilities of the one or more frequency bands of the second radio access technology indicated in the first message. In some embodiments, the first message comprises one or more frequency band combinations operable by the communication node, each of the one or more frequency band combinations indicating a frequency band of a second radio access technology configured to cooperate with the frequency band of the first radio access technology, and the capability information comprises a capability of the one or more frequency band combinations indicated in the first message.
In another exemplary aspect, a wireless communication device including a processor is disclosed. The processor is configured to implement the methods described herein.
In yet another exemplary aspect, various techniques described herein may be embodied as processor executable code and stored on a computer readable program medium.
The details of one or more implementations are set forth in the accompanying drawings and the description below. Other features will be apparent from the description and drawings, and from the claims.
Drawings
Fig. 1 shows an exemplary schematic diagram of a system architecture for Dual Connectivity (DC).
Fig. 2 shows an exemplary signaling flow for a UE reporting UE capabilities.
Fig. 3A illustrates an exemplary signaling procedure for a UE operating in a signal connection mode.
Fig. 3B illustrates an exemplary signaling procedure for a UE operating in dual connectivity mode.
Fig. 4 illustrates an example of a wireless communication system in which techniques in accordance with one or more embodiments of the present technology may be applied.
Fig. 5 is a block diagram representation of a portion of a radio station.
Fig. 6 illustrates a flow chart representation of a method 600 for wireless communication.
Fig. 7 illustrates a flow chart representation of a method 700 for wireless communication.
Detailed Description
In most communication protocols, parties involved in communication exchange information about their respective capabilities such that each party only requests capabilities supported by the other party. For example, the network may inform User Equipment (UE) of its capabilities via System Information Block (SIB) messages, and the UE may inform the network of its capabilities via various Radio Resource Control (RRC) messages.
In a Long Term Evolution (LTE) system, when a UE receives a first message (e.g., UE capability query UECapabilityEnquiry) from an LTE Radio Access Network (RAN) node (e.g., LTE evolved NodeB (eNB)), the UE needs to report its capability to the RAN node in a second message (e.g., UE capability information) based on information provided in the first message.
The development of new generation wireless communications (5G New Radio (NR) communications) is part of a continuous mobile broadband evolution process to meet the demands of ever-increasing network demands. NR will provide a greater throughput to allow more users to connect simultaneously. Other things, energy consumption, equipment cost, spectral efficiency, and latency are also important to meet the needs of various communication scenarios.
With the advent of NR in the wireless domain, UEs will be able to support both protocols simultaneously. Fig. 1 shows an exemplary schematic diagram of a system architecture for Dual Connectivity (DC). The current base station in the core network 103, referred to as the first network element 101, may select an appropriate base station for the UE100 to act as the second network element 102. For example, an appropriate base station may be selected by comparing the channel quality of the base station with a predetermined threshold. Both base stations may provide radio resources to the UE100 for data transmission on the user plane. On the wired interface side, the first network element 101 and the core network 103 establish a control plane interface 104 for the UE 100. The second network element 102 and the core network 103 may establish a user plane interface 105 for the UE 100. An interface 106 (e.g., an Xn interface) interconnects the two network elements. On the radio interface side, the first and second network elements (101 and 102) may use the same or different Radio Access Technologies (RATs) to provide radio resources. Each network element may schedule transmissions with UE100 independently. A network element having a control plane connection to the core network is referred to as a primary node (e.g. the first network element 101) and a network element having only a user plane connection to the core network is referred to as a secondary node (e.g. the second network element 102). In some cases, the UE100 may be connected to more than two nodes, with one node acting as a primary node and the remaining nodes acting as secondary nodes.
In some embodiments, the UE may support LTE-NR Dual Connectivity (DC). For example, one of the typical LTE-NR dual connectivity architectures may be established as follows: the primary node is an LTE RAN node (e.g., eNB) and the secondary node is an NR RAN node (e.g., gNB). The eNB and the gNB are simultaneously connected to an Evolved Packet Core (EPC) network (e.g., an LTE core network). The architecture shown in fig. 1 may also be modified to include various primary/secondary node configurations. For example, the NR RAN node may be a primary node and the LTE RAN node may be a secondary node. In this case, the core network of the primary NR RAN node is the next generation converged network (NG-CN).
In LTE-NR DC, UE capabilities for LTE protocol and NR protocol include two parts: the general capability of the UE applicable to both LTE and NR protocols for single connectivity scenarios, and the band combining capability of the UE associated with dual connectivity scenarios. When the UE has multiple simultaneous connections with the network node, the frequency bands for the different network nodes must cooperate regardless of which RAT type is used. Herein, the term "cooperation" means that the UE can operate in a frequency band without any collision or substantial interference-that is, the frequency bands can coexist. For example, the third generation partnership project (3 GPP) standard specifies a set of frequency band combinations that can cooperate with each other. If band 1 and band 2 are not designated as an effective band combination, the UE cannot use band 1 in communication with node 1 and band 2 in communication with node 2 at the same time.
Currently, the UE reports its capabilities only as requested in a request message (e.g., UE capability query UECapabilityEnquire) sent by the master node. Because the request message may not request the UE to report its capability related to other Radio Access Types (RATs) used by the secondary nodes, the UE may not report such information even though the information is ultimately necessary for transmission between the secondary nodes.
This patent document describes the following technique: may be implemented on the UE for determining when and how to report its capabilities for other RAT types even when such information is not requested by the master node, thereby reducing signaling overhead for future communications between the UE and the core network.
Fig. 2 shows an exemplary signaling flow for a UE reporting UE capabilities. In this example, the UE 201 receives a request message 207 (e.g., UECapabilitiyEnquiry) from a master node 203 (e.g., eNB) to query its capabilities. The UE 201 supports LTE-NR dual connectivity, but may operate in a signal connection mode or dual connectivity mode. In some embodiments, the request message 209 includes only a single RAT type 207 of the master node. The UE 201 then includes its capabilities corresponding to the first RAT type 207. Further, the UE may include its capability for other supported RAT types. For example, the UE may report all bands of all other RAT types it supports in a response message 211 (e.g., UECapabilityInformation). In some embodiments, the UE may report all band combinations between other supported RAT types and the first RAT type 207 in response message 211.
In some embodiments, the request message 209 also includes information indicating a frequency band of the primary node corresponding to the RAT type 207. In this case, the UE may choose to report only the other RAT-type supporting bands that can cooperate with the RAT-type 207 band. In some implementations, the UE may report only supported band combinations that may operate with the bands of the first RAT type 207. In other words, the UE may choose to report only the capability to be able to cooperate with the serving RAN node (i.e., the master node).
In some embodiments, the request message 209 also includes other RAT types. However, the request message 209 does not include any information about the frequency band corresponding to the RAT type 207 of the primary node. The UE may choose to report all supported bands for other RAT types as indicated in request message 209. In some embodiments, the UE may report all supported band combinations between other RAT types and the first RAT type 207 as indicated in the request message 209.
In some embodiments, the request message 209 also includes other RAT types. The request message 209 also includes information indicating a frequency band of the primary node corresponding to the RAT type 207. In this case, the UE may choose to report only the frequency bands of the other RAT types as indicated in the request message 209, which may cooperate with the frequency bands of the RAT type 207. In some implementations, the UE may choose to report only supported band combinations that are capable of operating with the bands of the first RAT type 207. In other words, the UE may again choose to report only the capability to be able to cooperate with the serving RAN node (i.e., the primary node).
In some embodiments, the request message (e.g., UECapabilityEnquiry) includes the following information:
-RAT type:
a first RAT type (e.g. EUTRA) serving the RAN node
- (Optionally) a second RAT type (e.g. NR, MR-DC or MR-MC, etc.) different from the first RAT type
(Optional) third RAT type
- (Optional) band indicator:
frequency bands of (optional) first RAT type
Frequency bands of (optional) second RAT type
(Optional) frequency bands of the third RAT type
……
(Optional) band combination indicator
In some embodiments, the response message (e.g., UECapabilityInformation) includes the following information:
-capabilities of a first RAT type
-Capabilities of a second RAT type
(Optional) capabilities of a third RAT type
……
(Optional) capability corresponding to a frequency band of a second RAT type that may cooperate with a frequency band of the first RAT type indicated in the request message
The (optional) capability corresponding to the band combination indicated in the request message or the capability corresponding to the band combination that may cooperate with the band of the first RAT type indicated in the request message.
Details of the techniques are further described in the examples below. In each of the following embodiments, a UE supporting MultiRAT type (e.g., LTE-NR dual connectivity) may operate in a signal connection mode, a dual connectivity mode, or a multi-connectivity mode. Fig. 3A illustrates an exemplary signaling procedure for a UE operating in a signal connection mode. In fig. 3A, a UE301 is connected to an Evolved Universal Terrestrial Radio Access Network (EUTRAN) 303. The UE301 receives a request message (e.g., UECapabilityEnquiry) 305 from the RAN 303 asking it to report its capabilities. The UE then transmits a response message (e.g., UECapabilityInformation) 307 to the RAN 303. Fig. 3B illustrates an exemplary signaling procedure for a UE operating in dual connectivity mode. In fig. 3B, UE 311 is connected to LTE RAN 313 and NR RAN 315. Both LTE RAN 313 and NR RAN 315 are connected to EPC. The LTE RAN 313 is the primary node and the NR RAN is the secondary node. The UE 311 receives a request message (e.g., UECapabilityEnquiry) 317 from the LTE RAN 313 asking it to report its capabilities. The UE then transmits a response message (e.g., UE capability information) 319 to the LTE RAN 313.
Example embodiment 1
In this example, the UE performs the following steps:
step 101: the UE receives a request message (e.g., UECapabilityEnquiry) from the LTE RAN. The request message includes a RAT type corresponding to the LTE RAN, EUTRA. The request message may also include other RAT types, such as NR, multi-RAT-dual connectivity (MRDC), and/or multi-RAT-multi connectivity (MRMC). In this particular example, the request message includes a second RAT type. The second RAT type may be NR, MRDC or MRMC. However, the request message does not include any information about the LTE RAN band.
Step 102a: if the request message includes EUTRA and NR RAT types, the UE includes its capability for EUTRA, its capability for NR, and/or its capability for operating using multiple RATs. The capabilities for EUTRA include generic EUTRA capabilities (i.e., the capabilities required to operate in a single connectivity mode with the LTE RAN) that it has not yet reported to the EPC. The capabilities for NR include generic NR capabilities (i.e., the capabilities required to operate in a single connectivity mode with the NR RAN) that it has not reported to the EPC. The capability for operation using multiple RATs includes unreported capabilities related to all supported bands that may cooperate using LTE and NR. In some embodiments, the UE may report all supported band combinations between NR and LTE.
Step 102b: if the request message includes EUTRA and MR-DC RAT types, the UE includes its capability for EUTRA and its capability for MR-DC in its response message. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN). The capabilities for MR-DC include the ability to operate using dual RATs (e.g., EUTRA and NR) that have not yet been reported to the EPC.
Step 102c: if the request message includes EUTRA and MR-RC RATE types, the UE includes its capability for EUTRA and its capability for MR-MC in its response message. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN). The capabilities for MR-MC include their ability to operate using multiple RATs (e.g., UTRA, EUTRA, and NR) that have not yet been reported to EPC.
Example embodiment 2:
in this example, the UE performs the following steps:
Step 201: the UE receives a request message (e.g., UECapabilityEnquiry) from the LTE RAN. The request message includes a RAT type, EUTRA, corresponding to the serving RAN node. The request message may also include other RAT types, such as NR, multi-RAT dual connectivity (MRDC), and/or multi-RAT multi-connectivity (MRMC). In this particular example, the request message includes a second RAT type. The second RAT type may be NR, MRDC or MRMC. The request message also includes information about the frequency band of the LTE RAN. For example, the request message may include an indicator, such as an index value, to indicate the frequency band of the LTE RAN. Table 1 shows exemplary operating bands for EUTRA.
TABLE 1 EUTRA band
Step 202a: if the request message includes EUTRA and NR RAT types, the UE includes its capability for EUTRA, its capability for NR, and/or its capability for operating using multiple RATs. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN) as well as capabilities corresponding to the LTE RAN frequency band. The capabilities for NR include generic NR capabilities that have not been reported to the EPC (i.e. capabilities required for operation of the NR RAN in single connectivity mode), as well as unreported capabilities related to supported bands of the NR RAT, which may cooperate with bands of EUTRA as indicated in the request message. The capability for operation using multiple RATs includes unreported capabilities with respect to a supported frequency band of certain RAT types, such as NR RATs or narrowband internet of things (NBIOT) RATs, which may operate with the frequency band of EUTRA as indicated in the request message. For example, the UE may include an indicator, such as an index value, in the response message to indicate such supported frequency bands. In some embodiments, the UE may use a table of allowed frequency band combinations to determine whether one frequency band may operate with another frequency band. There is no need to report NR bands that cannot operate with the bands of the LTE RAN.
Step 202b: if the request message includes EUTRA and MR-DC RAT types, the UE includes its capability for EUTRA and its capability for MR-DC in its response message. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN) as well as capabilities corresponding to the LTE RAN frequency band. The capabilities for MR-DC include an unreported LTE-NR DC band that can operate with the band of the LTE RAN. For example, the UE may include an indicator, such as an index value, in the response message to indicate such supported frequency bands. In some embodiments, the UE may use a table of allowed band combinations to determine whether one band for one RAT type may operate with another band for another RAT type. Table 2 shows an exemplary table of band combinations. There is no need to report LTE-NR DC bands that cannot operate with the bands of the LTE RAN.
Table 2: inter-band dual connectivity operating band
Step 202c: if the request message includes EUTRA and MR-MC RAT types, the UE includes its capability for EUTRA and its capability for MR-MC in its response message. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN) as well as capabilities corresponding to the LTE RAN frequency band. The capabilities for MR-MC include an unreported LTE-NR MC band that can operate with the band of the LTE RAN. For example, the UE may include an indicator, such as an index value, in the response message to indicate such supported frequency bands. In some embodiments, the UE may use a table of allowed band combinations to determine whether one band for one RAT type may operate with another band for another RAT type. Note that table 2 applies to LTE-NR DC bands, but a similar table may be added to normalize which LTE-NR MC bands may operate with which EUTRA bands. There is no need to report LTE-NR MC bands that cannot operate with the bands of the LTE RAN.
Example embodiment 3
In this example, the UE performs the following steps:
Step 301: the UE receives a request message (e.g., UECapabilityEnquiry) from the LTE RAN. The request message includes a RAT type, EUTRA, corresponding to the serving RAN node. The request message may also include other RAT types, such as NR, multi-RAT dual connectivity (MRDC), and/or multi-RAT multi-connectivity (MRMC). In this particular example, the request message includes a second RAT type. The second RAT type may be NR, MRDC or MRMC. The request message also includes information about the frequency band of the LTE RAN, and information about the frequency band of the second RAT type (NR, MRDC, or MRMC). In some embodiments, the request message includes information about a combination of frequency bands between EUTRA and the second RAT type.
Step 302a: if the request message includes EUTRA and NR RAT types, the UE includes its capability for EUTRA, capability for NR, and/or capability for operating using multiple RATs. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN) as well as capabilities corresponding to the frequency bands of the LTE RAN. The capabilities for NR include generic NR capabilities not yet reported to the EPC (i.e., capabilities corresponding to the capabilities required by the NR RAN to operate in a single connectivity mode) as well as capabilities corresponding to the frequency bands of the NR RAN. The capability for operation using multiple RATs includes an unreported NR band that can operate with the band of EUTRA indicated in the request message. For example, the UE may include an indicator, such as an index value, in the response message to indicate the supported frequency bands. In some embodiments, the UE may use a table of allowed band combinations to determine whether one band for one RAT type may operate with another band for another RAT type. There is no need to report frequency bands that cannot operate together.
Step 302b: if the request message includes EUTRA and MR-DC RAT types, the UE includes its capability for EUTRA and its capability for MR-DC. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN) as well as capabilities corresponding to the frequency bands of the LTE RAN. The capabilities for MR-DC include an unreported LTE-NR DC band that can operate with the EUTRA band indicated in the request message. For example, the UE may include an indicator, such as an index value, in the response message to indicate such supported frequency bands. In some embodiments, the UE may use a table of allowed band combinations to determine whether one band for one RAT type may operate with another band for another RAT type. There is no need to report frequency bands that cannot operate together.
Step 302c: if the request message includes EUTRA and MR-MC RAT types, the UE includes its capability for EUTRA and its capability for MR-DC. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN) as well as capabilities corresponding to the frequency bands of the LTE RAN. The capabilities for MR-DC include an unreported LTE-NR MC band that can operate with an EUTRA band as indicated in the request message. For example, the UE may include an indicator, such as an index value, in the response message to indicate such supported frequency bands. In some embodiments, the UE may use a table of allowed band combinations to determine whether one band for one RAT type may operate with another band for another RAT type. There is no need to report frequency bands that cannot operate together.
Example embodiment 4
In this example, the UE performs the following steps:
Step 401: the UE receives a request message (e.g., UECapabilityEnquiry) from the LTE RAN. The request message includes only the RAT type corresponding to the serving RAN node, EUTRA. The request message does not include any information about the frequency band of the LTE RAN.
Since the UE supports multiple RAT types, such as EUTRA, NR, MR-DC and/or MR-MC, the UE may actively report capabilities for other RAT types that are not required by the LTE RAN, considering that the UE may switch to the NR node in the future, or add a secondary NR node for dual or multi-connection.
Step 402a: if the UE supports NR RAT types, the UE includes its capability for EUTRA, its capability for NR, and/or its capability for operating using multiple RATs. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN). The capabilities for NR include generic NR capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the NR RAN). The capability for operation using multiple RATs includes unreported capability for all supported bands where LTE and NR coordination can be used. In some embodiments, the UE may report all supported band combinations between NR and LTE.
Step 402b: if the UE supports the MR-DC RAT type, the UE includes its capability for EUTRA and its capability for MR-DC in its response message. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN). The capabilities for MR-DC include the capability for operation using dual RATs (e.g., EUTRA and NR) that have not yet been reported to the EPC.
Step 402c: if the UE supports MR-MC RAT types, the UE includes its capability for EUTRA and its capability for MR-MC in its response message. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN). The capabilities for MR-MC include the capability for operation using multiple RATs (e.g., UTRA, EUTRA, and NR) that have not yet been reported to EPC.
Example embodiment 5
In this example, the UE performs the following steps:
Step 501: the UE receives a request message (e.g., UECapabilityEnquiry) from the LTE RAN. The request message includes only the RAT type corresponding to the serving RAN node, EUTRA. The request message also includes information about the frequency band of the LTE RAN.
Since the UE supports multiple RAT types, such as EUTRA, NR, MR-DC and/or MR-MC, the UE may actively report capabilities for other RAT types that are not required by the LTE RAN, considering that the UE may switch to the NR node in the future, or add a secondary NR node for dual or multi-connectivity.
Step 502a: if the UE supports NR RAT types, the UE includes its capability for EUTRA, its capability for NR, and/or its capability for operating using multiple RATs. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN) as well as capabilities corresponding to the frequency bands of the LTE RAN. The capabilities for NR include generic NR capabilities that have not yet been reported to the EPC (i.e. capabilities required for operation of the NR RAN in single connectivity mode) as well as unreported capabilities related to the NR RAT supported frequency band that may cooperate with the frequency band of EUTRA as indicated in the request message. The capability for operating using multiple RATs includes unreported capability with respect to supported bands that may operate with bands of EUTRA as indicated in the request message. For example, the UE may include an indicator, such as an index value, in the response message to indicate such supported frequency bands. In some embodiments, the UE may use a table of allowed band combinations to determine whether one band for one RAT type may operate with another band for another RAT type. There is no need to report NR bands that cannot operate with the bands of the LTE RAN.
Step 502b: if the UE supports the MR-DC RAT type, the UE includes its capability for EUTRA and its capability for MR-DC in its response message. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN) as well as capabilities corresponding to the frequency bands of the LTE RAN. The capabilities for MR-DC include an unreported LTE-NR DC band that can operate with the band of the LTE RAN. For example, the UE may include an indicator, such as an index value, in the response message to indicate such supported frequency bands. In some embodiments, the UE may use a table of allowed band combinations to determine whether one band for one RAT type may operate with another band for another RAT type (such as shown in table 2). There is no need to report LTE-NR DC bands that cannot operate with the bands of the LTE RAN.
Step 502c: if the UE supports MR-MC RAT types, the UE includes its capability for EUTRA and its capability for MR-MC in its response message. The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN) as well as capabilities corresponding to the frequency bands of the LTE RAN. The capabilities for MR-MC include an unreported LTE-NR MC band that can operate with the band of the LTE RAN. For example, the UE may include an indicator, such as an index value, in the response message to indicate such supported frequency bands. In some embodiments, the UE may use a table of allowed band combinations to determine whether one band for one RAT type may operate with another band for another RAT type. There is no need to report LTE-NR MC bands that cannot operate with the bands of the LTE RAN.
Example embodiment 6
Step 601: the UE connects to a source LTE RAN node in EPC1. The UE is also connected to the NR RAN node forming an LTE-NR dual connection. The LTE RAN node is the primary node and the NR RAN node is the secondary node. The UE receives a request message (e.g., UECapabilityEnquiry) from a source LTE RAN node. The request message includes band indicators, e.g., 1, 2, and 3, to indicate the frequency bands of the source LTE RAN node (see table 1). The UE reports its capabilities corresponding to LTE bands 1, 2 and 3 in its response message (e.g., UE capability information). The UE also reports NR bands 3, 4, 5, 7 and 8, which may cooperate with LTE bands 1, 2 and 3 (see table 2). Optionally, the UE may further report the band combinations 0-9 (see table 2) to indicate the corresponding LTE-NR interoperability. Upon receiving the response, the source LTE RAN node relays the capability information to EPC1.
Step 602: the UE is handed over from a source LTE RAN node in EPC1 to a target LTE RAN node. The secondary NR node remains unchanged.
Step 603: the UE receives a request message (e.g., UECapabilityEnquiry) from the target LTE RAN node. The request message includes band indicators, e.g., 3, 4, and 5, to indicate the band of the target LTE RAN node. Since the queried frequency bands of the source LTE RAN node and the target LTE RAN node are different, the UE includes its capabilities corresponding to LTE frequency bands 4 and 5 in its response message. Note that the UE does not need to report its capabilities for band 3 again, as such capabilities have already been reported to EPC 1. The UE also reports NR bands 12, 13 and 17 (see table 2) that can cooperate with LTE bands 4 and 5. Optionally, the UE may also report the band combinations 10-16 (see table 2) to indicate the corresponding LTE-NR interoperability.
Step 604: in a different core network EPC2, the UE is handed over from the target LTE RAN to the third LTE RAN. The secondary NR node remains unchanged.
Step 605: the UE receives a request message (e.g., UECapabilityEnquiry) from a third LTE RAN node. The request message includes band indicators, e.g., 3,4, and 5, to indicate the band of the target LTE RAN node. Because of the core network variations, the UE needs to include its capabilities corresponding to LTE bands 3,4 and 5 in its response message to the third LTE RAN node. The UE also reports NR bands 5, 7, 8, 12, 13 and 17 (see table 2), which may cooperate with LTE bands 3,4 and 5. The UE also reports the band combinations 7-16 (see table 2) to indicate the corresponding LTE-NR interoperability.
Example 7
In this example, the UE performs the following steps:
Step 701: the UE receives a request message (e.g., UECapabilityEnquiry) from the LTE RAN. The request message includes only the RAT type corresponding to the serving RAN node, EUTRA. In this particular example, the network side does not support dual connectivity modes (e.g., does not support MR-DC RAT types). Thus, the request message also includes an indicator indicating that the UE does not need to report its capability for additional RAT types.
Step 702: the UE supports multiple RAT types, such as EUTRA, NR, MR-DC and/or MR-MC. However, since the request message indicates that no reporting of capabilities for other RAT types is required, the UE refuses to actively report such capabilities. The UE includes its capability for EUTRA in a response message (e.g., UE capability information). The capabilities for EUTRA include generic EUTRA capabilities that have not yet been reported to the EPC (i.e., the capabilities required to operate in a single connectivity mode with the LET RAN).
Note that although in the above embodiments the LTE RAN node is the master node, the same principles can be applied to various DC and/or MC configurations. For example, the NR RAN node may be a primary node and the LTE RAN node may be a secondary node. In this case, the core network of the primary NR RAN node is the next generation converged network (NG-CN).
Fig. 4 illustrates an example of a wireless communication system in which techniques in accordance with one or more embodiments of the present technology may be applied. The wireless communication system 400 may include one or more Base Stations (BSs) 405a, 405b, one or more wireless devices 410a, 410b, 410c, 410d, and a core network 425. The base stations 405a, 405b may provide wireless services to wireless devices 410a, 410b, 410c, and 410d in one or more wireless sectors. In some implementations, the base stations 405a, 405b include directional antennas to generate two or more directional beams to provide wireless coverage in different sectors.
The core network 425 may communicate with one or more base stations 405a, 405 b. The core network 425 provides connectivity to other wireless communication systems and wired communication systems. The core network may include one or more service subscription databases to store information about subscribed wireless devices 410a, 410b, 410c, and 410 d. The first base station 405a may provide wireless services based on a first radio access technology and the second base station 405b may provide wireless services based on a second radio access technology. Depending on the deployment scenario, the base stations 405a and 405b may be quasi co-located or may be installed separately in the field. Wireless devices 410a, 410b, 410c, and 410d may support a variety of different radio access technologies.
In some implementations, a wireless communication system may include multiple networks using different wireless technologies. Dual-mode or multi-mode wireless devices include two or more wireless technologies that may be used to connect different wireless networks.
Fig. 5 is a block diagram representation of a portion of a radio station. A radio station 505, such as a base station or wireless device (or UE), may include processor electronics 510, such as a microprocessor, that implements one or more of the wireless techniques set forth in this document. The radio station 505 may include transceiver electronics 515 to transmit and/or receive wireless signals over one or more communication interfaces, such as an antenna 520. The radio station 505 may comprise other communication interfaces for transmitting and receiving data. The radio station 505 may comprise one or more memories (not explicitly shown) configured to store information such as data and/or instructions. In some implementations, the processor electronics 510 may include at least a portion of the transceiver electronics 515. In some embodiments, at least some of the disclosed techniques, modules, or functions are implemented using a radio station 505.
Fig. 6 illustrates a flow chart representation of a method 600 for wireless communication. The method 600 includes: at 602, a first message is received at a wireless device from a communication node operating using a first radio access technology, the first message configured to query the wireless device for capabilities of the first radio access technology. The method further comprises the steps of: at 604, a second message is transmitted from the wireless device to the communication node indicating capability information of the wireless device in response to the first message. In some embodiments, the capability information includes capabilities for a first radio access technology and additional capabilities for a second radio access technology.
Fig. 7 illustrates a flow chart representation of a method 700 for wireless communication. The method 700 includes transmitting, from a communication node operating using a first radio access technology, a first message to a wireless device, the first message configured to query the wireless device for capabilities of the first radio access technology. The method further comprises the steps of: at 704, a second message is received at the communication node from the wireless device indicating capability information of the wireless device in response to the first message. In some embodiments, the capability information includes capabilities for a first radio access technology and additional capabilities for a second radio access technology.
It is therefore apparent that techniques for reporting the capabilities of a UE operating under dual connectivity are disclosed. Using the techniques described herein, a UE with dual connectivity with a primary node and a secondary node may actively report the ability of the primary node to unsolicited RAT types, thereby reducing future signaling overhead when the UE is handed over to a different primary node or changes secondary nodes.
From the foregoing, it will be appreciated that specific embodiments of the disclosed technology have been described herein for purposes of illustration, but that various modifications may be made without deviating from the scope of the invention. Accordingly, the disclosed technology is not limited except by the following claims.
The disclosed and other embodiments, modules, and functional operations described in this document may be implemented in the following: digital electronic circuitry, or computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or combinations of one or more of them. The disclosed and other embodiments may be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer readable medium, for execution by, or to control the operation of, data processing apparatus. The computer readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter effecting a machine-readable propagated signal, or a combination of one or more of them. The term "data processing apparatus" encompasses all apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers. In addition to hardware, the apparatus may include code that creates an execution environment for the computer program in question, such as code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. A propagated signal is an artificially generated signal, e.g., a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to suitable receiver apparatus.
Computer programs (also known as programs, software applications, scripts, or code) may be written in a form of programming language (including compiled or interpreted languages), and can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. The computer program does not necessarily correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub-programs, or portions of code). A computer program can be deployed to be executed on one computer or on multiple computers at one site or distributed across multiple sites and interconnected by a communication network.
The processes and logic flows described in this document can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit).
Processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical disks, or optical disks. However, the computer need not have such a device. Computer readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including by way of example semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magnetizing an optical disc; CD ROM and DVD ROM discs. The processor and the memory may be supplemented by, or incorporated in, special purpose logic circuitry.
Although this patent document contains many specifics, these should not be construed as limitations on the scope of any invention or of what may be claimed, but rather as descriptions of features that may be specific to particular embodiments of particular inventions. Certain features that are described in this patent document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.
Similarly, although operations are depicted in a particular order in the figures, this should not be understood as requiring: such operations are performed in the particular order or sequential order shown, or all illustrated operations are performed, to achieve desirable results. Furthermore, the separation of various system components in the embodiments described in this patent document should not be understood as requiring such separation in all embodiments.
Only a few embodiments and examples are described, and other embodiments, enhancements, and variations may be made based on what is described and shown in this patent document.
Claims (24)
1. A method for wireless communication, comprising:
a wireless device receiving a first message from a communication node operating using a first radio access technology, the first message configured to query only the wireless device's capabilities for the first radio access technology; and
In response to the first message, the wireless device transmits a second message to the communication node indicating capability information of the wireless device, the capability information including capabilities for the first radio access technology and additional capabilities for a second radio access technology,
Wherein the first radio access technology comprises an evolved universal terrestrial radio access network and the second radio access technology comprises a new wireless NR, a multiple radio access technology-dual connectivity or a multiple radio access technology-multiple connectivity.
2. The method of claim 1, wherein the capability information of the wireless device includes capabilities for a frequency band of a second radio access technology in which the wireless device is capable of operating, and wherein the frequency band of the second radio access technology is configured to cooperate with the frequency band of the first radio access technology.
3. The method of claim 1, wherein the capability information of the wireless device includes capabilities for frequency band combinations in which the wireless device is capable of operating, and wherein each frequency band combination indicates a frequency band of the second radio access technology configured to cooperate with a frequency band of the first radio access technology.
4. The method of claim 1, wherein the first message comprises one or more frequency bands of the first radio access technology in which the communication node is capable of operating.
5. The method of claim 1, wherein the first message comprises one or more frequency band combinations where the communication node is operable, wherein each of the one or more frequency combinations indicates a frequency band of the second radio access technology configured to cooperate with a frequency band of the first radio access technology.
6. The method of claim 4 or 5, wherein the capability information of the wireless device comprises one or more frequency bands of the second radio access technology in which the wireless device is capable of operating, and wherein the one or more frequency bands of the second radio access technology are configured to cooperate with the one or more frequency bands of the first radio access technology indicated by the first message.
7. The method of claim 4 or 5, wherein the capability information of the wireless device comprises one or more combinations of frequency bands in which the wireless device is capable of operating, and wherein each of the one or more combinations of frequency bands indicates a frequency band of the second radio access technology configured to cooperate with a frequency band of the first radio access technology indicated by the first message.
8. The method of claim 1, wherein the first message comprises one or more frequency bands of the second radio access technology, and wherein the capability information of the wireless device comprises capabilities of the one or more frequency bands of the second radio access technology as indicated in the first message.
9. The method of claim 1, wherein the first message comprises one or more frequency band combinations where the communication node is capable of operating, each of the one or more frequency band combinations indicating a frequency band of the second radio access technology configured to cooperate with a frequency band of the first radio access technology, and wherein the capability information comprises capabilities of the one or more frequency band combinations as indicated in the first message.
10. The method of claim 1, wherein the second message indicates capability information that selectively includes additional capability for the second radio access technology based on an indicator included in the first message.
11. The method of claim 1, wherein the wireless device is operable in one of a single connection mode, a dual connection mode, or a multiple connection mode.
12. A method for wireless communication, comprising:
Transmitting a first message from a communication node operating using a first radio access technology to a wireless device, the first message configured to query only the wireless device's capabilities for the first radio access technology; and
The communication node receives a second message from the wireless device in response to the first message and indicating capability information of the wireless device, the capability information comprising capabilities for the first radio access technology and additional capabilities for a second radio access technology,
Wherein the first radio access technology comprises an evolved universal terrestrial radio access network and the second radio access technology comprises a new wireless NR, a multiple radio access technology-dual connectivity or a multiple radio access technology-multiple connectivity.
13. The method of claim 12, wherein the capability information of the wireless device includes capabilities for a frequency band of the second radio access technology in which the wireless device is capable of operating, and wherein the frequency band of the second radio access technology is configured to cooperate with the frequency band of the first radio access technology.
14. The method of claim 12, wherein the capability information of the wireless device includes capabilities for a combination of frequency bands in which the wireless device is capable of operating, and wherein each of the combination of frequency bands indicates a frequency band of the second radio access technology that is configured to cooperate with a frequency band of the first radio access technology.
15. The method of claim 12, wherein the first message includes one or more frequency bands of the first radio access technology in which the communication node is capable of operating.
16. The method of claim 12, wherein the first message comprises one or more combinations of frequency bands where the communication node is operable, wherein each of the one or more combinations of frequency bands indicates a frequency band of the second radio access technology configured to cooperate with a frequency band of the first radio access technology.
17. The method of claim 15 or 16, wherein the capability information of the wireless device includes one or more frequency bands of the second radio access technology in which the wireless device is capable of operating, and wherein the one or more frequency bands of the second radio access technology are configured to cooperate with the one or more frequency bands of the first radio access technology indicated by the first message.
18. The method of claim 15 or 16, wherein the capability information of the wireless device comprises one or more combinations of frequency bands in which the wireless device is capable of operating, and wherein each of the one or more combinations of frequency bands indicates a frequency band of the second radio access technology configured to cooperate with a frequency band of the first radio access technology indicated by the first message.
19. The method of claim 12, wherein the first message includes one or more frequency bands of the second radio access technology, and wherein the capability information of the wireless device includes capabilities of the one or more frequency bands of the second radio access technology as indicated in the first message.
20. The method of claim 12, wherein the first message comprises one or more combinations of frequency bands where the communication node is capable of operating, each of the one or more combinations of frequency bands indicating a frequency band of the second radio access technology configured to cooperate with a frequency band of the first radio access technology, and wherein the capability information comprises capabilities of the one or more combinations of frequency bands as indicated in the first message.
21. The method of claim 12, wherein the second message indicates capability information that selectively includes additional capability for the second radio access technology based on an indicator included in the first message.
22. The method of claim 12, wherein the wireless device is operable in one of a single connection mode, a dual connection mode, or a multiple connection mode.
23. An apparatus for wireless communication, comprising a processor configured to perform the method of any of claims 1-22.
24. A non-transitory computer readable medium having code stored thereon, which when executed by a processor causes the processor to implement the method of any of claims 1 to 22.
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| WO2021159420A1 (en) | 2020-02-13 | 2021-08-19 | Nokia Shanghai Bell Co., Ltd. | Signalling optimisation |
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| CN114554478B (en) * | 2020-11-25 | 2023-12-15 | 深圳市万普拉斯科技有限公司 | User equipment capability information processing method, device, mobile device and storage medium |
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