CN116156599A - Method and device for access of RedCAP terminal to 5G cell - Google Patents
Method and device for access of RedCAP terminal to 5G cell Download PDFInfo
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- CN116156599A CN116156599A CN202310408823.7A CN202310408823A CN116156599A CN 116156599 A CN116156599 A CN 116156599A CN 202310408823 A CN202310408823 A CN 202310408823A CN 116156599 A CN116156599 A CN 116156599A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 101150096310 SIB1 gene Proteins 0.000 claims description 37
- 238000012545 processing Methods 0.000 claims description 9
- 238000010295 mobile communication Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method and a device for a RedCAP terminal to access a 5G cell. Step S1: the RedCap terminal judges whether the cell supports the RedCap terminal. Step S2: the RedCap terminal determines whether a 5G NR neighboring cell supporting the RedCap terminal is available for camping. Step S3: the RedCap terminal determines whether the initial BWP configured by the 5G NR cell for the RedCap terminal is less than or equal to the bandwidth capability of the RedCap terminal. Step S4: the RedCap terminal reduces its own protocol version or accesses the cell in the manner of a legacy terminal. The invention makes the RedCAP terminal access the 5G NR cell supporting the RedCAP terminal preferentially, if there is no cell meeting the condition, the invention reduces the protocol version of itself or accesses the 5G NR cell not supporting the RedCAP terminal according to the traditional terminal mode in the current protocol.
Description
Technical Field
The present invention relates to a mobile communication technology, and in particular, to a method for a mobile terminal to access a cell.
Background
3GPP (3 rd Generation Partnership Project, third Generation partnership project) is an internationalized Mobile communication standardization organization. The 3GPP R15 (release 15) standard is formally frozen at month 6 of 2018. The 3GPP R16 (release 16) standard is formally frozen 7 months 2020. The 3GPP R17 (release 17) standard is formally frozen at month 6 of 2022.
A RedCap (Reduced Capability, reduced performance) terminal is defined in the 3gpp r17 freeze standard. The RedCap terminal reduces complexity by reducing terminal air interface capabilities, such as antenna capabilities, system bandwidth, peak rate, etc., to meet the requirements for reducing terminal cost, size, and power consumption. In other words, redCap is a lightweight, low cost, low power consumption 5G terminal technology.
According to the existing 3GPP specification requirements, the 5G network to which the RedCap terminal accesses needs to be upgraded to the 3GPP r17 standard. The current large-scale coverage 5G network is usually 3gpp r15 standard or 3gpp r16 standard, and the upgrade cost of the 5G network is not enough, so that the mobile communication operator can hardly upgrade the whole 5G network in a short period of time, which restricts the development of the RedCap industry.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for enabling a RedCAP terminal to access a 5G network built by a 3GPP R16 or earlier standard.
In order to solve the technical problems, the invention provides a method for accessing a RedCap terminal to a 5G cell, which comprises the following steps. Step S1: the method comprises the steps that a RedCAP terminal receives SIB1 information issued by a 5G NR cell and judges whether the 5G NR cell supports the RedCAP terminal or not; if not, the RedCAP terminal acquires the system bandwidth capability of the network of the 5G NR cell and the initial bandwidth part BWP configured by the 5G NR cell for the RedCAP terminal from the SIB1 message of the 5G NR cell; then step S2 is entered; if so, the RedCAP terminal normally accesses the 5G NR cell. Step S2: the method comprises the steps that the RedCAP terminal judges whether a 5G NR adjacent cell supporting the RedCAP terminal is available for residence; if yes, the RedCAP terminal accesses the adjacent cell; if not, step S3 is entered. Step S3: the RedCap terminal judges whether the initial BWP configured by the 5G NR cell for the RedCap terminal is less than or equal to the bandwidth capability of the RedCap terminal; if yes, the RedCAP terminal can access the 5G NR cell; then step S4 is entered; if not, the RedCAP terminal cannot access the 5G NR cell. Step S4: the RedCap terminal sets itself to support a protocol of the 3gpp r16 standard or accesses the 5G NR cell in a conventional terminal manner in the 3gpp r17 standard.
Further, in the step S1, after receiving the SIB1 message issued by the 5G NR cell, the RedCap terminal determines whether the following three conditions exist. Case one: the SIB1 message does not contain an interfreqresulectionredcap. And a second case: the value of the interFreqReselectionRedCAP in the SIB1 message is notAllowed. And a third case: the values of cellBarredRedCAP1Rx-r17 and cellBarredRedCAP2Rx-r17 in the SIB1 message are barred. If any one or more of the above three conditions exist, the RedCap terminal considers that the 5G NR cell does not support the RedCap terminal access; if none of the above three conditions exists, the RedCap terminal considers that the 5G NR cell supports RedCap terminal access.
Further, in the step S1, the system bandwidth capability of the network is obtained through the carrier bandwidth field in the SIB1 message.
Further, in the step S1, the initial BWP is calculated through a locationendband field in the SIB1 message.
Further, in the step S4, if the 5G NR cell exists in the first case, the RedCap terminal sets itself to a protocol supporting the 3gpp r16 standard and accesses the 5G NR cell; or, the RedCap terminal accesses the 5G NR cell according to a conventional terminal mode in the 3gpp r17 standard.
Further, in the step S4, if the 5G NR cell exists in the first case, the RedCap terminal first selects to set itself to a protocol supporting the 3gpp r16 standard and then accesses the 5G NR cell; and secondly, selecting to access the 5G NR cell according to the traditional terminal mode in the 3GPP R17 standard.
Further, in the step S4, if the 5G NR cell exists in the second case, the RedCap terminal accesses the 5G NR cell according to the conventional terminal mode in the 3gpp r17 standard.
Further, in the step S4, if the 5G NR cell exists in the third case, the RedCap terminal accesses the 5G NR cell according to the conventional terminal mode in the 3gpp r17 standard.
The application also provides a device for accessing the RedCAP terminal to the 5G cell, which comprises a first judging unit, a second judging unit, a third judging unit and an access unit. The first judging unit is used for receiving SIB1 information issued by a 5G NR cell and judging whether the 5G NR cell supports a RedCAP terminal or not; if not, the RedCAP terminal acquires the system bandwidth capability of the network of the 5G NR cell and the initial BWP configured by the 5G NR cell for the RedCAP terminal from the SIB1 message of the 5G NR cell, and then the initial BWP is delivered to a second judging unit for continuous processing; if so, the RedCAP terminal normally accesses the 5G NR cell. The second judging unit is used for judging whether a 5G NR adjacent cell supporting the RedCAP terminal is available for residence; if yes, the RedCAP terminal accesses the adjacent cell; if not, the processing is continued by the third judging unit. The third judging unit is configured to judge whether an initial BWP configured by the 5G NR cell for the RedCap terminal is less than or equal to a bandwidth capability of the RedCap terminal; if yes, the RedCAP terminal can access the 5G NR cell and then gives the access unit to continue processing; if not, the RedCAP terminal cannot access the 5G NR cell. The access unit is configured to access the 5G NR cell after the RedCap terminal sets itself to a protocol supporting the 3gpp r16 standard, or according to a conventional terminal manner in the 3gpp r17 standard.
The invention has the technical effects that: and enabling the RedCAP terminal to be preferentially accessed into a 5G NR cell supporting the RedCAP terminal, and if the cell meeting the conditions does not exist, accessing the 5G NR cell not supporting the RedCAP terminal in a mode of reducing the protocol version of the cell or according to the traditional terminal mode in the current protocol, so that service interruption is prevented, and the availability of the RedCAP terminal is greatly increased.
Drawings
Fig. 1 is a flow chart of a method for accessing a 5G cell by a RedCap terminal according to the present application.
Fig. 2 is a schematic structural diagram of an apparatus for accessing a 5G cell by a RedCap terminal according to the present application.
The reference numerals in the drawings illustrate: 1 is a first judging unit, 2 is a second judging unit, 3 is a third judging unit, and 4 is an access unit.
Detailed Description
Referring to fig. 1, the method for accessing a RedCap terminal to a 5G cell includes the following steps.
Step S1: the RedCap terminal receives the SIB1 message issued by the 5G NR (new radio) cell, and determines whether the 5G NR cell supports the RedCap terminal. The SIB1 message defines scheduling of other SIBs and contains information required for a UE (user equipment, i.e., mobile terminal) to access a cell. Wherein the SIB represents a system information block (System Information Block).
After receiving the SIB1 message issued by the 5G NR cell, the RedCAP terminal judges whether the following three conditions exist.
Case one: the SIB1 message does not contain an interfreqresulectionredcap. The UE may determine the version of the 5G NR cell using the intrafreqReselection redcap field in the SIB1 message. The SIB1 message issued by the 5G NR cell constructed according to the 3gpp r17 standard may carry an intrafreqReselection redcap field, and the SIB1 message issued by the 5G NR cell constructed according to the 3gpp r16 or earlier standard may not carry an intrafreqReselection redcap field.
And a second case: the value of the interFreqReselectionRedCAP in the SIB1 message is notAllowed.
And a third case: the values of cellBarredRedCAP1Rx-r17 and cellBarredRedCAP2Rx-r17 in the SIB1 message are barred. Where cellbarreddedcap 1Rx-r17 represents the camping and access control set for the cell barring identity (cell barred) of a single receive antenna RedCap terminal. The cellbarreddedcap 2Rx-r17 represents the camping and access control set for the cell barring identity of the dual receive antenna RedCap terminal.
If any one or more of the above three conditions exist, the RedCap terminal considers that the 5G NR cell does not support RedCap terminal access. This shows that the configuration of the 5G NR cell is only for legacy terminals (legacy UEs) that do not support RedCap. The RedCap terminal acquires the system Bandwidth capability of the network of the 5G NR cell and the initial BWP (Bandwidth Part) configured by the 5G NR cell for the RedCap terminal from the SIB1 message of the 5G NR cell. The system bandwidth capability of the network represents the total carrier bandwidth of the cell (carrier bandwidth), derived from the carrier bandwidth field in the SIB1 message. BWP is a subset or part of the total carrier bandwidth of the cell, where the initial BWP is used for terminal access to the cell, calculated by the locationnandbwidth field in SIB1 message. The cell implements bandwidth adaptation by configuring the UE with one or more BWP and telling the UE which BWP to activate. Then step S2 is entered.
If none of the above three conditions exists, the RedCap terminal considers that the 5G NR cell supports RedCap terminal access. And then the RedCAP terminal normally accesses the 5G NR cell, and the whole process is finished.
Step S2: the RedCap terminal determines whether a 5G NR neighboring cell supporting the RedCap terminal is available for camping. The RedCap terminal accesses the neighboring cell, if any. If not, go to step S3.
Step S3: the RedCap terminal compares the initial BWP configured by the 5G NR cell for the RedCap terminal with the bandwidth capability of the RedCap terminal, and determines whether the RedCap terminal can access the 5G NR cell.
If the initial BWP configured by the 5G NR cell for the RedCap terminal is less than or equal to the bandwidth capability of the RedCap terminal, it indicates that the RedCap terminal can access the 5G NR cell. Then step S4 is entered.
If the initial BWP configured by the 5G NR cell for the RedCAP terminal is greater than the bandwidth capability of the RedCAP terminal, the condition that the RedCAP terminal cannot access the 5G NR cell is indicated. The whole process is ended.
Step S4: the RedCap terminal accesses the 5G NR cell after setting itself as a protocol supporting the 3GPP R16 standard, or accesses the 5G NR cell according to the traditional terminal mode in the 3GPP R17 standard, to obtain voice and data service.
If the SIB1 message issued by the 5G NR cell does not include the intra freqReselection Redcap, the Redcap terminal sets itself to support the 3gpp r16 standard protocol and accesses the 5G NR cell, which is a preferred scheme. Alternatively, the RedCap terminal accesses the 5G NR cell in a conventional manner as in the 3gpp r17 standard, which is a sub-option.
If the SIB1 message issued by the 5G NR cell contains an intra freqReselection RedCap and has a value of notAllowed, the RedCap terminal accesses the 5G NR cell according to a conventional terminal mode in the 3gpp r17 standard, and obtains voice and data services.
If the SIB1 message issued by the 5G NR cell includes cellbarredreddepa 1Rx-r17 and cellbarredreddepa 2Rx-r17, and both values are barred, the redepa terminal accesses the 5G NR cell according to a conventional terminal mode in the 3gpp r17 standard.
Referring to fig. 2, the apparatus for accessing a RedCap terminal to a 5G cell includes a first determining unit 1, a second determining unit 2, a third determining unit 3, and an accessing unit 4. The apparatus shown in fig. 2 corresponds to the method shown in fig. 1.
The first judging unit 1 is configured to receive SIB1 message sent by a 5G NR cell, and judge whether the 5G NR cell supports a RedCap terminal. If so, the RedCAP terminal normally accesses the 5G NR cell. If not, the RedCap terminal acquires the system bandwidth capability of the network of the 5G NR cell and the initial BWP configured by the 5G NR cell for the RedCap terminal from the SIB1 message of the 5G NR cell, and then gives the initial BWP to the second judging unit 2 for continuing processing.
The second determining unit 2 is configured to determine whether a 5G NR neighboring cell supporting the RedCap terminal is available for camping. The RedCap terminal accesses the neighboring cell, if any. If not, the processing is continued by the third judging unit 3.
The third determining unit 3 is configured to determine whether an initial BWP configured by the 5G NR cell for the RedCap terminal is less than or equal to a bandwidth capability of the RedCap terminal. If so, the RedCap terminal can access the 5G NR cell and then gives the access unit 4 to continue processing. If not, the RedCAP terminal cannot access the 5G NR cell.
The access unit 4 is configured to access the 5G NR cell after the RedCap terminal sets itself to a protocol supporting the 3gpp r16 standard, or in a manner of a conventional terminal in the 3gpp r17 standard.
The RedCap terminal is introduced in the 3gpp r17 standard, and there is no concept of the RedCap terminal and the non-RedCap terminal (i.e., legacy terminal) in the 3gpp r16 or earlier standard. The method for accessing the RedCAP terminal to the 5G cell can lead the RedCAP terminal to access the 5G NR cell built according to the 3GPP R17 standard preferentially, and if the cell which accords with the conditions does not exist, the 5G NR cell built according to the 3GPP R16 standard or earlier can be accessed, thereby greatly expanding the application range of the RedCAP terminal and being beneficial to promoting the rapid development of the RedCAP terminal.
The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method for accessing a RedCAP terminal to a 5G cell is characterized by comprising the following steps of;
step S1: the method comprises the steps that a RedCAP terminal receives SIB1 information issued by a 5G NR cell and judges whether the 5G NR cell supports the RedCAP terminal or not; if not, the RedCAP terminal acquires the system bandwidth capability of the network of the 5G NR cell and the initial bandwidth part BWP configured by the 5G NR cell for the RedCAP terminal from the SIB1 message of the 5G NR cell; then step S2 is entered; if yes, the RedCAP terminal normally accesses the 5G NR cell;
step S2: the method comprises the steps that the RedCAP terminal judges whether a 5G NR adjacent cell supporting the RedCAP terminal is available for residence; if yes, the RedCAP terminal accesses the adjacent cell; if not, entering step S3;
step S3: the RedCap terminal judges whether the initial BWP configured by the 5G NR cell for the RedCap terminal is less than or equal to the bandwidth capability of the RedCap terminal; if yes, the RedCAP terminal can access the 5G NR cell; then step S4 is entered; if not, the RedCAP terminal cannot access the 5G NR cell;
step S4: the RedCap terminal sets itself to support a protocol of the 3gpp r16 standard or accesses the 5G NR cell in a conventional terminal manner in the 3gpp r17 standard.
2. The method for accessing the RedCap terminal to the 5G cell according to claim 1, wherein in the step S1, after receiving the SIB1 message issued by the 5G NR cell, the RedCap terminal judges whether the following three conditions exist;
case one: the SIB1 message does not contain an INTRAFreqReselectionRedCAP;
and a second case: the value of the interFreqReselectionRedCAP in the SIB1 message is notAllowed;
and a third case: the values of cellBarredRedCAP1Rx-r17 and cellBarredRedCAP2Rx-r17 in the SIB1 message are barred;
if any one or more of the above three conditions exist, the RedCap terminal considers that the 5G NR cell does not support the RedCap terminal access; if none of the above three conditions exists, the RedCap terminal considers that the 5G NR cell supports RedCap terminal access.
3. The method according to claim 1, wherein in step S1, the system bandwidth capability of the network is obtained through a carrier bandwidth field in SIB1 message.
4. The method according to claim 1, wherein in the step S1, the initial BWP is calculated by using a locationband field in the SIB1 message.
5. The method for accessing the 5G cell by the RedCap terminal according to claim 2, wherein in the step S4, if the 5G NR cell exists in case one, the RedCap terminal sets itself to a protocol supporting the 3gpp r16 standard and accesses the 5G NR cell; or, the RedCap terminal accesses the 5G NR cell according to a conventional terminal mode in the 3gpp r17 standard.
6. The method for accessing the 5G cell by the RedCap terminal according to claim 5, wherein in the step S4, if the 5G NR cell exists in case one, the RedCap terminal first selects to set itself to a protocol supporting the 3gpp r16 standard and then accesses the 5G NR cell; and secondly, selecting to access the 5G NR cell according to the traditional terminal mode in the 3GPP R17 standard.
7. The method for accessing the 5G cell by the RedCap terminal according to claim 2, wherein in the step S4, if the 5G NR cell exists in the second case, the RedCap terminal accesses the 5G NR cell according to the conventional terminal mode in the 3gpp r17 standard.
8. The method for accessing the 5G cell by the RedCap terminal according to claim 2, wherein in the step S4, if the 5G NR cell exists in the third situation, the RedCap terminal accesses the 5G NR cell according to the conventional terminal mode in the 3gpp r17 standard.
9. The device for accessing the 5G cell by the RedCAP terminal is characterized by comprising a first judging unit, a second judging unit, a third judging unit and an access unit;
the first judging unit is used for receiving SIB1 information issued by a 5G NR cell and judging whether the 5G NR cell supports a RedCAP terminal or not; if not, the RedCAP terminal acquires the system bandwidth capability of the network of the 5G NR cell and the initial BWP configured by the 5G NR cell for the RedCAP terminal from the SIB1 message of the 5G NR cell, and then the initial BWP is delivered to a second judging unit for continuous processing; if yes, the RedCAP terminal normally accesses the 5G NR cell;
the second judging unit is used for judging whether a 5G NR adjacent cell supporting the RedCAP terminal is available for residence; if yes, the RedCAP terminal accesses the adjacent cell; if not, the processing is continued by the third judging unit;
the third judging unit is configured to judge whether an initial BWP configured by the 5G NR cell for the RedCap terminal is less than or equal to a bandwidth capability of the RedCap terminal; if yes, the RedCAP terminal can access the 5G NR cell and then gives the access unit to continue processing; if not, the RedCAP terminal cannot access the 5G NR cell;
the access unit is configured to access the 5G NR cell after the RedCap terminal sets itself to a protocol supporting the 3gpp r16 standard, or according to a conventional terminal manner in the 3gpp r17 standard.
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| CN202310408823.7A CN116156599B (en) | 2023-04-18 | 2023-04-18 | Method and device for access of RedCAP terminal to 5G cell |
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