Protocol Rel

 Last updated: September 16, 2009

 The 1xEV-DO air-interface standard (3GPP2 C.S0024) has evolved from release 0 (1xEV-DO) to release A (1xEV-DO-A) and afterwards release B(1xEV-DO-B). The latter release offers more functionality and improved data rates on both the forward and reverse channels with the new subtypes (protocol release A with subtype 2 and protocol release B with subtype 3), see Release A Physical Layer Subtype or Release B Physical Layer Subtype for details.

 Protocol Rel sets the protocol release (3GPP2 C.S0024 standard) that the test set is emulating. While in the Active Cell operating mode, the Protocol Rel was sent to the AT in the Sync Message (as defined by the C.S0024, the value 0x01 is sent for release 0, release A and release B) on the control channel at a rate of 1.28 second period.

 


   
NOTE
You must purchase a feature license (E1966A-102 for release A and E1966A-103 for release B) from Keysight Technologies to enable this functionality in a licensed test application or order a special free feature license (E67066A-102 for release A and E6706A-103 for release B) from Keysight Technologies to enable this functionality in a licensed lab application. However, having the feature license E1966A-102 from Keysight Technologies does not grant you use of the Qualcomm® proprietary Release A functionality, and also having the E1966A-103 feature license from Keysight Technologies does not grant you use of the Qualcomm® proprietary Release B functionality. You must obtain consent from Qualcomm® to utilize this feature, as explained in the following statement:

 NOTICE
THE DELIVERY OF THE KEYSIGHT PRODUCT DOES NOT CONVEY A LICENSE NOR IMPLY ANY RIGHTS TO USE THE "1xEV-DO REVISION A" CAPABILITY CONTAINED IN THE KEYSIGHT PRODUCT. SUCH USE REQUIRES THE EXPRESS CONSENT OF OR A SEPARATE LICENSE FROM QUALCOMM INCORPORATED. CUSTOMERS AND PRODUCT USERS SHALL BE SOLELY RESPONSIBLE TO OBTAIN SUCH CONSENT OR LICENSE FROM QUALCOMM INCORPORATED IN CONJUNCTION WITH THE USE OF THE "1XEVDO REVISION A" CAPABILITY.


   
 

 Release A Concepts

 1xEV-DO Release A uses 1.2288 Mcps as the spread rate and has the backwards compatibility with 1xEV-DO Release 0.

 Release A supports three physical channel modes: Subtype 0 physical layer is the same as the original air interface in Release 0. Subtype 1 physical layer is very similar to subtype 0, but with support for variable rate R-Access Channel operation. Subtype 2 physical layer supports a new, high rate R-Traffic Channel along with increased data rates and support for smaller packets on the F-Traffic Channel (see Release A Physical Layer Subtype ). Besides, Release A has a number of new applications:

     
  • The Multi-Flow Packet Application provides multiple octet streams that can be used to carry octets between the access terminal and the access network. See Multi-Flow Packet Application Description .
  •  The 3G1X Circuit Services Notification Application allows cdma2000 messages to be tunneled through the 1xEV-DO air interface. Thus a dual mode mobile (cdma2000/1xEV-DO) can remain camped onto the 1xEV-DO channel and still send/receive circuit services messages. This allows the mobile to register, receive SMS messages, and receive pages from the cdma2000 system while physically listening to the 1xEV-DO network. This mode of operation eliminates the need for the Hybrid Mode where the phone must periodically tune to the cdma2000 1x to check for messages. See Hybrid Mode .
  •  The new Multi-Mode Capability Discovery Application allows the network to discover if an AT supports such features as Hybrid Mode, Receiver Diversity or multiple TX and/or RX chains.
 

 Release B Concepts

 1xEV-DO Release B uses 1.2288 Mcps as the spread rate and has the backwards compatibility with Release 0 and Release A. To obtain increased data throughput, Release B can optionally support multiple combined RF channels. The following new protocols are added to support multi-carrier operation: Multi-carrier Forward Traffic Channel MAC Protocol, Multi-carrier Reverse Traffic Channel MAC Protocol and Subtype 3 Physical Layer Protocol (see Release B Physical Layer Subtype ).

 The new Subtype 3 Physical Layer Protocol supports multiple carriers in the forward and reverse links to increase data throughput. Moreover, with 64-QAM modulation, Subtype 3 Physical Layer Protocol supports new optional forward link rates up to 4.915 Mbps which makes the theoretical peak data throughput for three Forward/Reverse channels to be 3 x 4.915 Mbps = 14.745 Mbps in the forward Link and 3 x 1.8432 Mbps = 5.5296 Mbps in the reverse link.

 Release B supports three multi-carrier multiplexing modes: No Feedback Multiplexing mode, Basic Feedback Multiplexing mode and the Enhanced Feedback Multiplexing mode. The test set only supports for the No Feedback Multiplexing mode in which each pair of forward/reverse channels operates as a stand alone pair. In the No Feedback Multiplexing mode, the feedback channels (R-DRC, R-ACK and R-DSC) for each forward channel are transmitted on a paired reverse channel using the same user long code sequences just as in Release A. See Multi-carrier Multi-unit (MCMU) for the Release B solution supported by the test set.

 

 Operating Considerations

     
  • If a session is open in Active Cell operating mode, changing the protocol release results in a session re-negotiation (see Session Negotiate State ). If a data connection is open, changing the protocol release results in the connection dropped with signaling. You will have to re-open the connection.
  •  ( Lab Application Only ) The test set currently supports Default Packet Application when Protocol Rel is A (1xEV-DO-A) and Release A Physical Layer Subtype is Subtype 2 .
  •  Not all Session Application Type are supported in all protocol release or physical layer subtypes. In Active Cell operating mode, if a protocol release that do not support a certain Session Application Type is selected, the selection will be rejected. See Supported Session Application Type per Physical Layer and Protocol Release. for which applications are supported in a certain protocol.
  •  The test set currently supports protocol release A (1xEV-DO-A) and protocol release B (1xEV-DO-B) in IS-856 Test operating mode.
  •  The test set does not support Subtype 1 Physical Layer protocol and Enhanced Control Channel MAC Protocol as defined in the C.S0024-A standard. See Current Physical Layer Subtype and Associated Protocols .
  •  Due to a change in the signaling when 1xEV-DO Release A was introduced (the SCP Configuration Request contains a new field called "ATSupportedApplicationSubtypes" which was added in the 3GPP2 C.S0024 -A v3.0 standard), the test set running the E1966A Test Application version A.05.11 or  E6706A Lab Application A.02.11 and earlier releases can not open a session with the 1xEV-DO Release A capable Access Terminals operating in 1xEV-DO Release 0 mode. The test set with these firmware versions cannot decode the new field and so a session failure will occur. Upgrading to newer firmware revisions will enable the test set to properly decode this parameter and will allow a session to be opened when the newer Release A phones are operating in Release 0 mode.
 

Related Topics


 

GPIB Command: CALL[:CELL]:PROTocol[:SELected]

 Manual Operation: How Do I Change Call Parameters?

 Release A Physical Layer Subtype

 Release B Physical Layer Subtype

 Access Channel MAC Subtype

 Forward Channel Overview

 Reverse Channel Overview