Showing posts with label LTE Attach Type. Show all posts
Showing posts with label LTE Attach Type. Show all posts

Wednesday, March 16, 2016

Cause in LTE

RRC Connection Establishment Cause:
1. emergency
2. highPriorityAccess
3. mt-Access
4. mo-Signalling
5. mo-Data
6. delayTolerantAccess-v1020
7. spare2
8. spare1

RRC Connection Re-Establishment Cause:
1. reconfigurationFailure,
2. handoverFailure,
3. otherFailure,
4. spare1

RRC Connection Release Cause: 
        1. LoadBalancingTAURequired
2.  'other'
3. 'CS Fallback High Priority'
4. Normal

LTE Attach Type in Attach Request:
EPS attach type value (octet 1)
Bits
3 2 1
0 0 1 EPS attach
0 1 0 combined EPS/IMSI attach
1 1 0 EPS emergency attach
1 1 1 reserved
All other values are unused and shall be interpreted as "EPS attach", if received by the
network.
Bit 4 of octet 1 is spare and shall be coded as zero.

LTE Attach Result in Attach Accept:
EPS attach result value (octet 1)
Bits
3 2 1
0 0 1 EPS only
0 1 0 combined EPS/IMSI attach
All other values are reserved.
Bit 4 of octet 1 is spare and shall be coded as zero.

Additional update type value (AUTV) (octet 1)
       Bit
       1
       0 No additional information. If received it shall be interpreted as request for combined
attach or combined tracking area updating.
       1 SMS only
Bits 4 to 2 of octet 1 are spare and shall be all coded as zero.

Additional update result value (octet 1)
       Bits
       2 1
       0 0 no additional information
       0 1 CS Fallback not preferred
       1 0 SMS only
       1 1 reserved
Bits 4 and 3 of octet 1 are spare and shall all be coded as zero.


Tracking area update request Type:
EPS update type value (octet 1, bit 1 to 3)
Bits
3 2 1
0 0 0 TA updating
0 0 1 combined TA/LA updating
0 1 0 combined TA/LA updating with IMSI attach
0 1 1 periodic updating
1 0 0 unused; shall be interpreted as "TA updating", if received by the network.
1 0 1 unused; shall be interpreted as "TA updating", if received by the network.
All other values are reserved.
"Active" flag (octet 1, bit 4)
Bit
4
0 No bearer establishment requested
1 Bearer establishment requested

Tracking area update accept Result Type: 
EPS update result value (octet 1, bit 1 to 3)
Bits
3 2 1
0 0 0 TA updated
0 0 1 combined TA/LA updated
1 0 0 TA updated and ISR activated (NOTE)
1 0 1 combined TA/LA updated and ISR activated (NOTE)
All other values are reserved.
Bit 4 of octet 1 is spare and shall be coded as zero.

NOTE: Values "TA updated and ISR activated" and "combined TA/LA updated and
ISR activated" are used only for a UE supporting also A/Gb or Iu mode.


Type Of Detach: 
Type of detach (octet 1)
In the UE to network direction:
Bits
3 2 1
0 0 1 EPS detach
0 1 0 IMSI detach
0 1 1 combined EPS/IMSI detach
1 1 0 reserved
1 1 1 reserved
All other values are interpreted as "combined EPS/IMSI detach" in this version of the
protocol.
In the network to UE direction:
Bits
3 2 1
0 0 1 re-attach required
0 1 0 re-attach not required
0 1 1 IMSI detach
1 1 0 reserved
1 1 1 reserved
All other values are interpreted as "re-attach not required" in this version of the
protocol.
Switch off (octet 1)
In the UE to network direction:
Bit
4
0 normal detach
1 switch off
In the network to UE direction bit 4 is spare. The network shall set this bit to zero.



PDN type value (octet 1)
       Bits
       3 2 1
       0 0 1 IPv4
       0 1 0 IPv6
       0 1 1 IPv4v6
       1 0 0 unused; shall be interpreted as "IPv6" if received by the network
All other values are reserved.
Bit 4 of octet 1 is spare and shall be coded as zero.