CN111314859A - eMTC cluster realizing method - Google Patents

eMTC cluster realizing method Download PDF

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Publication number
CN111314859A
CN111314859A CN201811517003.7A CN201811517003A CN111314859A CN 111314859 A CN111314859 A CN 111314859A CN 201811517003 A CN201811517003 A CN 201811517003A CN 111314859 A CN111314859 A CN 111314859A
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China
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emtc
cluster
terminal
lte
trunking
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CN111314859B (en
Inventor
范晨
袁乃华
周志宏
朱玉梅
佟学俭
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TD Tech Chengdu Co Ltd
Chengdu TD Tech Ltd
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Chengdu TD Tech Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • 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
    • 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

Abstract

The application provides an eMTC cluster implementation method, which comprises the following steps: the eMTC trunking terminal reports eMTC capability information to a core network through a base station; wherein the eMTC capability information includes: eMTC PS capability information and eMTC cluster capability information; the core network server starts an eMTC cluster flow according to eMTC capability information reported by the eMTC cluster terminal, and determines that the eMTC cluster terminal resides in the eMTC; the base station determines a resident narrow band for the eMTC trunking terminal according to the eMTC capability information reported by the eMTC trunking terminal; and the eMTC trunking terminal receives the Attach receiving Attach Accept sent by the base station and determines the resident narrow band of the eMTC trunking terminal. The method can realize the cluster service bearing of the compatibility of the eMTC and the B-Trunc.

Description

eMTC cluster realizing method
Technical Field
The invention relates to the technical field of communication, in particular to an enhanced machine communication (eMTC) cluster implementation method.
Background
For low-rate internet of things services, 3GPP has formulated the eMTC standard at R13. eMTC is used for low power consumption wide area (LPWA) IOT applications, typical applications include intelligent meter reading, intelligent parking, intelligent environmental monitoring, intelligent agriculture, etc., and requires a network side to provide:
coverage enhancement: the coverage is enhanced by 15dB compared with GPRS;
low power consumption: the service life of the battery reaches more than 5 years;
the cost is low: module <10 $;
mass connection: a single cell supports a 5w number of users.
eMTC technology can be introduced into the B-trunk cluster to reduce the power consumption of the terminal and improve the cell coverage:
scene one: the eMTC mode is used in both the normal coverage area and the coverage enhancement area.
Scene two: the LTE mode is used in the normal coverage area and the eMTC mode is used in the coverage enhancement area.
At present, eMTC channel design only aims at low-speed data service, and cluster service cannot be carried.
Disclosure of Invention
In view of this, the present application provides an eMTC cluster implementation method, which can implement a cluster service bearer compatible with eMTC and B-TrunC.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
an implementation method of an enhanced machine type communication (eMTC) cluster comprises the following steps:
the eMTC trunking terminal reports eMTC capability information to a core network through a base station; wherein the eMTC capability information includes: eMTC PS capability information and eMTC cluster capability information;
the core network server starts an eMTC cluster flow according to eMTC capability information reported by the eMTC cluster terminal, and determines that the eMTC cluster terminal resides in the eMTC;
the base station determines a resident narrow band for the eMTC trunking terminal according to the eMTC capability information reported by the eMTC trunking terminal;
and the eMTC trunking terminal receives the Attach receiving Attach Accept sent by the base station and determines the resident narrow band of the eMTC trunking terminal.
The technical scheme can realize the attachment of the eMTC trunking terminal.
The eMTC cluster sends a Control Plane Service Request to the MME through the base station; the Request carries a cluster speaking right application PTT Speaker Request;
and the MME forwards the received PTT Speaker Request to a PTT cluster for processing and feeding back.
Wherein the content of the first and second substances,
and indicating that the Control plan service Request carries the PTT Speaker Request by adding a cluster message information element (Trunk Messages IE).
Or, indicating that the Control Plane Service Request carries the PTT Speaker Request by newly adding a value in a Control Plane Service type field.
The scheme realizes the process of initiating the group call by the eMTC trunking terminal.
The method comprises the steps that a core network server counts the number of eMTC trunking terminals and Long Term Evolution (LTE) trunking terminals of a current cell of a corresponding trunking group;
when determining that the eMTC trunking terminal exists and/or the LTE trunking terminal exists, establishing a corresponding group downlink user plane in the cell;
if the eMTC cluster terminal exists, carrying an eMTC cluster mark when sending a GROUP context establishment REQUEST GROUP CALCONT SETUP REQUEST to the base station;
if the LTE cluster terminal exists, carrying an LTE cluster mark when sending a GROUP CALL CONTEXT SETUP REQUEST to the base station;
and if the LTE cluster terminal and the eMTC cluster terminal exist, carrying the LTE cluster mark and the eMTC cluster mark when sending a GROUP CALL CONTEXTSOUP REQUEST to the base station.
When the GROUP CALL CONTEXT SETUP REQUEST received by the base station only carries the eMTC trunking mark, the GROUP paging trunk paging is sent to the eMTC trunking terminal by using the MPDCCH only on the narrow band determined for the eMTC trunking terminal;
when the received GROUP CALL CONTEXT SETUP REQUEST only carries the LTE cluster mark, only the LTE uses the PDCCH to send a sounding Paging to the LTE cluster terminal;
when the received GROUP CALL CONTEXT SETUP REQUEST carries the LTE cluster mark and the eMTC cluster mark, the LTE and the eMTC respectively send sounding Paging to the LTE cluster terminal and the eMTC cluster terminal.
The LTE trunking terminal and the eMTC trunking terminal share trunking user plane data.
The scheme realizes the dynamic deletion and establishment of the LTE terminal and the eMTC trunking terminal resources.
For the eMTC trunking terminal, the MPDCCH adopts G-RNTI scrambling to schedule a PDSCH on a NarrowBand where the eMTC trunking terminal resides.
For the LTE trunking terminal, the PDCCH adopts G-RNTI scrambling to schedule a PDSCH on the LTE or a PDSCH on a Narrow Band where the eMTC trunking terminal resides.
Wherein the content of the first and second substances,
configuring the number of times of sending the MPDCCH as N aiming at the eMTC trunking terminal; configuring the number of times of sending the PDSCH corresponding to the MPDCCH as M; wherein M and N are configured by higher layer signaling;
for the LTE cluster terminal, the PDCCH schedules a PDSCH of the same subframe; configuring the number of PDSCHs binding TTIBunding in a PDCCH scheduling subframe as K; wherein, the TTI bundling subframe number is configured by high-level signaling.
Wherein the content of the first and second substances,
and configuring the PDCCH/PDSCH retransmission times of the unified data packet by RRC signaling for the LTE cluster terminal.
The scheme realizes the process of scheduling the downlink users of the same group by the dual control plane.
Drawings
Fig. 1 is a schematic diagram of an implementation flow of an eMTC cluster in an embodiment of the present application;
fig. 2 is a schematic diagram illustrating contents of a control plane service request message in an embodiment of the present application;
FIG. 3 is a diagram illustrating an example of indicating a PTT Speaker Request by newly adding a value in a Control plane service type field in the present application;
fig. 4 is a diagram illustrating scheduling of PDSCH in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The embodiment of the application provides an eMTC cluster implementation method, when an eMTC cluster terminal reports eMTC capability information, the eMTC PS capability information is reported, the eMTC cluster capability information is also reported, and a base station determines a resident narrow band for the eMTC cluster terminal according to the eMTC capability information reported by the eMTC cluster terminal. The scheme can realize the cluster service bearing of the compatibility of the eMTC and the B-Trunc.
The following describes an eMTC cluster implementation procedure in this embodiment in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of an implementation flow of an eMTC cluster in this embodiment. The method comprises the following specific steps:
step 101, an eMTC trunking terminal reports eMTC capability information to a core network through a base station; wherein the eMTC capability information includes: eMTC PS capability information and eMTC cluster capability information.
eMTC PS capability information in this step: including CP optimization, UP optimization, Non-IP capability, etc. of 3 GPP;
eMTC cluster capability information: including with IP clusters, Non-IP clusters, cluster CP optimization, cluster UP optimization, etc.
When reporting the eMTC capability information, reporting the eMTC capability information through Attach.
Step 102, the core network server starts an eMTC trunking process according to eMTC capability information reported by the eMTC trunking terminal, and determines that the eMTC trunking terminal resides in the eMTC.
And 103, the base station determines a resident narrow band for the eMTC trunking terminal according to the eMTC capability information reported by the eMTC trunking terminal.
And the base station and the core network server respond to the Attach sent by the terminal through the Attach Accept.
And step 104, the eMTC trunking terminal receives the Attach receive Attach Accept sent by the base station, and determines the resident narrow band of the eMTC trunking terminal.
The Attach process of the eMTC trunking terminal is provided herein, and the Attach process of the Long Term Evolution (LTE) trunking terminal is implemented as follows:
the LTE cluster terminal reports the LTE cluster capacity to a core network server through a base station by using Attach information, and the core network starts a B-trunC cluster flow; and determining the resident LTE according to the LTE cluster capability information of the LTE cluster terminal.
And the core network server informs the LTE where the LTE cluster terminal resides through the base station by using an Attach message.
After the terminal performs Attach, the LTE trunking terminal and the eMTC trunking terminal perform cell camping selection, which includes the following specific processes:
the LTE cluster terminal receives LTE SIB and cluster SIB 20 messages and resides in LTE;
the eMTC cluster terminal receives SIB1-BR and eMTC cluster SIB messages and resides in a certain eMTC Narrow Band (Narrow Band) of the cell.
The following gives the process of initiating group call by the eMTC trunking terminal:
firstly, an eMTC cluster sends a Control Plane service request (Control Plane service request) to an MME through a base station; the Request carries the cluster talk burst Request PTT Speaker Request.
The Control Plane Service Request needs to add a new field to indicate that the carried content is a cluster message, and the following two ways of implementing the indication are provided in the embodiment of the application:
first, it indicates that the Control Plane ServiceRequest carries the PTT Speaker Request by adding a Trunk Messages IE.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating contents of a control plane service request message in an embodiment of the present application. The Trunk Messages IE added in FIG. 2 is "Control Plane service type" and is used to indicate that the Control Plane service Request carries the PTT Speaker Request.
And determining the received message as non-access stratum signaling bearer Internet of things Data (eMTC Data over NAS) Data according to the 'Trunk Messages container' in the Trunk Messages IE.
And secondly, indicating that the ControlPlane Service Request carries the PTT Speaker Request by newly adding a value in a ControlPlane Service type field.
Referring to fig. 3, fig. 3 is a schematic diagram of indicating a PTT Speaker Request by adding a value in a Control plane service type field in the embodiment of the present application.
In fig. 3, the value "111" is used to indicate the PTT Speaker Request, and in a specific implementation, the value may not be limited to the value "111", and a value that is not used in the existing standard protocol may be used.
No matter which mode is used for indication, the terminal and the MME agree with each other, namely, the indication modes are respectively configured at two ends, or the indication mode is configured at one end, and the other end is informed to realize the indication.
And secondly, the MME forwards the received PTT Speaker Request to a PTT cluster for processing and feeding back.
When the received cluster signaling (PTT Speaker Request) is determined, forwarding to PTT processing;
when determining that the received Data is eMTC Data over NAS Data, forwarding the Data to the SGW for processing.
And sends S1-AP Initial Context Setup to the base station.
And carrying out radio bearer reconfiguration between the base station and the eMTC trunking terminal.
And after the PTT receives the PTT Speaker Request, the PTT responds to the PTT Speaker Accept/project to the MME.
And when the MME receives the PTT Speaker Accept/Reject sent by the PTT, the MME sends a DLNAS direct transmission (PTT Speaker Accept/Reject) to the eMTC trunking terminal.
The dynamic control process for the resources of the LTE trunking terminal and the eMTC trunking terminal is given below:
the method comprises the steps that a core network server counts the quantity of eMTC trunking terminals and LTE trunking terminals of a current cell of a corresponding trunking group;
when determining that the eMTC trunking terminal exists and/or the LTE trunking terminal exists, establishing a corresponding group downlink user plane in the cell;
in specific implementation, user lists can be respectively established for the eMTC trunking terminal and the LTE trunking terminal; and when a corresponding terminal is counted, recording the identification of the corresponding terminal into a corresponding user list.
And when determining that at least one eMTC trunking terminal or LTE trunking terminal is counted, establishing a downlink user plane of a corresponding group in the counted cell.
If the eMTC trunking terminal exists, carrying an eMTC trunking mark when sending a GROUP context establishment REQUEST (GROUP CALCONTREXT SETUP REQUEST) to the base station;
if the LTE cluster terminal exists, carrying an LTE cluster mark when sending a GROUP CALL CONTEXT SETUP REQUEST to the base station;
and if the LTE cluster terminal and the eMTC cluster terminal exist, carrying the LTE cluster mark and the eMTC cluster mark when sending a GROUP CALL CONTEXTSOUP REQUEST to the base station.
That is, when a port between the base station and the core network server sends a GROUP CALL context REQUEST to the base station, the eMTC cluster and/or LTE cluster flag is added.
When the base station receives the mark added by the GROUP CALL CONTEXT SETUP REQUEST, the eMTC/LTE dual control surface selection is carried out according to the corresponding mark, which is concretely as follows:
when the GROUP CALL CONTEXT SETUP REQUEST received by the base station only carries the eMTC trunking mark, the GROUP paging trunk paging is sent to the eMTC trunking terminal by using the MPDCCH only on the narrow band determined for the eMTC trunking terminal;
when the received GROUP CALL CONTEXT SETUP REQUEST only carries the LTE cluster mark, only the LTE uses the PDCCH to send a sounding Paging to the LTE cluster terminal;
when the received GROUP CALL CONTEXT SETUP REQUEST carries the LTE cluster mark and the eMTC cluster mark, the LTE and the eMTC respectively send sounding Paging to the LTE cluster terminal and the eMTC cluster terminal.
When the LTE cluster terminal receives the sounding Paging sent by using the PDCCH, the LTE cluster terminal establishes an LTE group;
and when the eMTC Trunking terminal receives the trunk Paging sent by using the MPDCCH, the eMTC Trunking terminal establishes an eMTC group.
The LTE trunking terminal and the eMTC trunking terminal share trunking user plane data.
The base station carries out LTE and eMTC dual control surface scheduling on the downlink user surface of the same group, and the control mode is as follows:
for the eMTC trunking terminal, the MPDCCH adopts G-RNTI scrambling to schedule a PDSCH on a NarrowBand where the eMTC trunking terminal resides.
Configuring the number of times of sending the MPDCCH as N aiming at the eMTC trunking terminal; configuring the number of times of sending the PDSCH corresponding to the MPDCCH as M; wherein the M and N are configured by higher layer signaling.
For the LTE trunking terminal, the PDCCH adopts G-RNTI scrambling to schedule a PDSCH on the LTE or a PDSCH on a Narrow Band where the eMTC trunking terminal resides.
For the LTE cluster terminal, the PDCCH schedules a PDSCH of the same subframe; configuring the number of PDSCHs binding TTIBunding in a PDCCH scheduling subframe as K; wherein, the TTI bundling subframe number is configured by high-level signaling.
Referring to fig. 4, fig. 4 is a schematic diagram of scheduling PDSCH in the embodiment of the present application. As can be seen from fig. 4, the eMTC trunking terminal may schedule the PDSCH on the Narrow Band where the eMTC trunking terminal resides; the LTE trunked terminal may schedule PDSCH on LTE, and may also schedule PDSCH on Narrow Band where the eMTC trunked terminal resides.
Aiming at an eMTC trunking terminal, the existing eMTC already supports the realization of MPDCCH/PDSCH retransmission times;
and configuring the PDCCH/PDSCH retransmission times of the unified data packet by RRC signaling for the LTE cluster terminal.
In summary, the eMTC trunking implementation process is given in detail by giving an attachment process of an eMTC trunking terminal, a process of selecting a residential cell, and a group call initiation process;
and dynamically counting the resources of the eMTC cluster terminal and the LTE terminal, and realizing the establishment of a terminal group and the scheduling of a dual-control plane by adding a cluster mark on an S1 port.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. An implementation method for an enhanced machine type communication (eMTC) cluster is characterized by comprising the following steps:
the eMTC trunking terminal reports eMTC capability information to a core network through a base station; wherein the eMTC capability information includes: eMTC PS capability information and eMTC cluster capability information;
the core network server starts an eMTC cluster flow according to eMTC capability information reported by the eMTC cluster terminal, and determines that the eMTC cluster terminal resides in the eMTC;
the base station determines a resident narrow band for the eMTC trunking terminal according to the eMTC capability information reported by the eMTC trunking terminal;
and the eMTC trunking terminal receives the Attach receiving Attach Accept sent by the base station and determines the resident narrow band of the eMTC trunking terminal.
2. The method of claim 1, further comprising:
the eMTC cluster sends a Control Plane Service Request to the MME through the base station; the Request carries a cluster speaking right application PTT Speaker Request;
and the MME forwards the received PTT Speaker Request to a PTT cluster for processing and feeding back.
3. The method of claim 2,
and indicating that the Control Plane ServiceRequest carries the PTT Speaker Request by adding a cluster message information element (Trunk Messages IE).
4. The method of claim 2,
and indicating that the ControlPlane Service Request carries the PTT Speaker Request by newly adding a value in a Control plane Service type field.
5. The method of claim 1, further comprising:
the method comprises the steps that a core network server counts the number of eMTC trunking terminals and Long Term Evolution (LTE) trunking terminals of a current cell of a corresponding trunking group;
when determining that the eMTC trunking terminal exists and/or the LTE trunking terminal exists, establishing a corresponding group downlink user plane in the cell;
if the eMTC cluster terminal exists, carrying an eMTC cluster mark when sending a GROUP context establishment REQUEST GROUP CALL CONTEXTSTUP REQUEST to the base station;
if the LTE cluster terminal exists, carrying an LTE cluster mark when sending a GROUP CALL CONTEXT SETUP REQUEST to the base station;
and if the LTE cluster terminal and the eMTC cluster terminal exist, carrying the LTE cluster mark and the eMTC cluster mark when sending a GROUP CALL CONTEXTSOUP REQUEST to the base station.
6. The method of claim 5, further comprising:
when the GROUP CALL CONTEXT SETUP REQUEST received by the base station only carries the eMTC Trunking mark, the GROUP Paging is sent to the eMTC Trunking terminal by using the MPDCCH only on the narrow band determined for the eMTC Trunking terminal;
when the received GROUP CALL CONTEXT SETUP REQUEST only carries the LTE cluster mark, only the LTE uses the PDCCH to send a sounding Paging to the LTE cluster terminal;
when the received GROUP CALL CONTEXT SETUP REQUEST carries the LTE cluster mark and the eMTC cluster mark, the LTE and the eMTC respectively send sounding Paging to the LTE cluster terminal and the eMTC cluster terminal.
7. The method of claim 6, further comprising:
the LTE trunking terminal and the eMTC trunking terminal share trunking user plane data.
8. The method of claim 1, further comprising:
for the eMTC trunking terminal, the MPDCCH adopts G-RNTI scrambling to schedule a PDSCH on a Narrow Band where the eMTC trunking terminal resides.
For the LTE trunking terminal, the PDCCH adopts G-RNTI scrambling to schedule a PDSCH on the LTE or a PDSCH on a Narrow Band where the eMTC trunking terminal resides.
9. The method of claim 8,
configuring the number of times of sending the MPDCCH as N aiming at the eMTC trunking terminal; configuring the number of times of sending the PDSCH corresponding to the MPDCCH as M; wherein M and N are configured by higher layer signaling;
for the LTE cluster terminal, the PDCCH schedules a PDSCH of the same subframe; configuring the number of PDSCHs for binding TTI bundling by a PDCCH scheduling subframe as K; wherein, the TTI bundling subframe number is configured by high-level signaling.
10. The method according to any one of claims 1-9, wherein the method further comprises:
and configuring the PDCCH/PDSCH retransmission times of the unified data packet by RRC signaling for the LTE cluster terminal.
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