This section describes the MEC architecture.

This section describes the call flow procedures related to MEC support.

Whenever the user moves to idle mode, each PDN's default bearer is checked to see if the GW-U IP address matches the TAI List. If a mismatch is found, paging is initiated.

When the user connects back again either by TAU or Service Request based on the new tracking area from where the TAU or Service Request is received, each PDN's default bearer is checked to see if the GW-U IP address matches the TAI List. If mismatch is found and if the PDN and UE Usage is marked Re-connect in APN Profile, the PDNs are deleted with Re-Activation cause code. TAI List will be taken from TAI Management DB or MEC TAI Group based on the configuration of TAI List and UP address".

Use the following configuration to configure the addresses of User Plane Nodes Serving all TAIs in this object.

configure  
   lte-policy  
      tai-mgmt-db tai_mgmt_db_name 
         tai-mgmt-obj tai_mgmt_obj_name 
            [ no ] up-address ( IP-ADDRESS | IP-ADDRESS/MASK } 
            end 

NOTES:

• no : Removes the addresses of User Plane Nodes Serving all TAIs in this object.

• [ no ] up-address ( IP-ADDRESS | IP-ADDRESS/MASK } Configures the addresses of User Plane Nodes Serving all TAIs in this Object. IP-ADDRESS must be an IPV4 ##.##.##.## or IPV6 ####:####:####:####:####:####:####:####. Also supports :: notation IP-ADDRESS/MASK must be an IPV4 ##.##.##.##/x or IPV6 ####:####:####:####:####:####:####:####/x.

Use the following configuration to configure the up-address of User Plane Nodes Serving all TAIs in this object.

configure  
   lte-policy  
      mec-tai-grp mec_tai_grp_name 
            [ no ] up-address ( IP-ADDRESS | IP-ADDRESS/MASK } mef-address iPV4/iPV6_address 
            end 

NOTES:

• no : Removes the addresses of User Plane Nodes Serving all TAIs in this object.

• up-address ( IP-ADDRESS | IP-ADDRESS/MASK } Configures the addresses of User Plane Nodes Serving all TAIs in this Object. IP-ADDRESS must be an IPV4 ##.##.##.## or IPV6 ####:####:####:####:####:####:####:####. Also supports :: notation IP-ADDRESS/MASK must be an IPV4 ##.##.##.##/x or IPV6 ####:####:####:####:####:####:####:####/x.

• mef-address iPV4/iPV6_address : Configures the peer MEF server address for MEF signalling.iPV4/iPV6_address must be IPV4 ##.##.##.## or IPV6 ####:####:####:####:####:####:####:#### (IPV6 also supports :: notation).

Use the following configuration to configure the Tracking Area Identity.

configure  
   lte-policy  
      mec-tai-grp mec_tai_grp_name 
         [ no ] tai mcc mcc_value mnc mnc_value { tac value1... value20  | tac-range from  tac_value_from   to  tac_value_to   }  
            [ no ] up-address ( IP-ADDRESS | IP-ADDRESS/MASK } 
            end 

NOTES:

• no : Removes the configuration of tai.

• mec-tai-grp mec_tai_grp_name : Configures MEC TAI Group.mec_tai_grp_name must be a string between 1 to 64. Maximum of 50 MEC TAI Groups can be configured.

• tai : Specifies the Tracking Area Identity.

• mcc mcc_value : Specifies the Mobile Country Code.mcc_value must be a three digit integer between 0 to 999.

• mnc mnc_value : Specifies the Mobile National Code.mnc_value must be a two / three digit integer between 00 to 999.

• tac value1... value20 : Specifies the Tracking Area Code. Upto 20 Tracking Area Codes can be entered on one line. It can be configured by entering TAC directly or using range. value1... value20 must be an integer between 0 to 65535.

• tac-range from tac_value_from to tac_value_to : Specifies the Range of Tracking Area Code. Maximum of 5 ranges in a MEC TAI group can be configured. tac_value_from and tac_value_to must be an integer between 0 to 65535.

Use the following configuration to configure action for User-Plane Service Area Change for MME.

configure  
   context context_name 
      apn-profile apn_profile_name  
         up-service-area-change disconnect-pdn [ ue-usage-type ] ue_usage_type_values 
         end 

NOTES:

• up-service-area-change : Configures action for User-Plane Service Area Change for MME.

• disconnect-pdn : Enables reselection of User Plane Node by PDN disconnection.

• ue-usage-type ue_usage_type_values : Configures UE usage type for disconnecting PDN for UP service area. ue_usage_type_values must be an integer 1 through 255.

Important

Release 21.15 onwards, PGW-U IP address is used for User Plane address.

show mme-service statistics

The output of this command includes the following fields:

Paging Initiation for SIGNALING PDN RECONN Events:

• Attempted

• Success

• Failures

  • Success at Last n eNB

  • Success at TAI List

  • Success at Last TAI

show lte-policy mec-tai-grp name <grp_name>

The output of this command includes the following fields:

MEC TAI Group group grp_name

• TAI mcc 123 mnc 45 tac 2010 2011 2457

• TAI mcc 123 mnc 456 tac

• UP-address 192.80.80.10 MEF-ADDRESS 192.80.80.175

show lte-policy mec-tai-grp summary

• MEC TAI Group group1

• MEC TAI Group group2

The following statistics are added in support of the MEC Location Management feature: