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Re: [STDS-802-16-MOBILE] The corrigendum D3 states BIG endian for PN but shows LITTLE endi an PN in the examples.

Title:
The PN is transmitted in LITTLE endian as required by section 7.5.1.2.1 PDU Payload Format of Cor1/D3.
 
Indeed, according to contribution C80216maint-50/100 which was accepted during last session, the
first paragraph of section 7.5.1.2.2 PN (Packet Number) from Cor1/D2 should have been modified to

The PN associated with an SA shall be set to 1 when the SA is established and when a new TEK is installed.
The PN shall be transmitted little endian order in the MAC PDU as described in 7.5.1.2.1. After each PDU
transmission, the PN shall be incremented by 1. On uplink connections, the PN shall be XORed with
0x80000000 prior to encryption and transmission. On downlink connections, the PN shall be used without
such modification.

Unfortunately, it seems that there was a slight mistake introduced during the editing of D3 and the changed text
has been appended to the section instead of replacing the first paragraph, introducing a confusion on the endianness of PN.

But again, there is no doubt that PN is sent in LITTLE endian.

-- Joël


Ma Steve-p20680 wrote:
Message

The corrigendum D3 states BIG endian for PN but shows LITTLE endian PN in the examples.

I hope this has been corrected,

Steve