736702 - B2G SMS: always-zero message reference(TP-MR) in SUBMIT

Status: RESOLVED WONTFIX

(Core :: DOM: Device Interfaces, defect)

Description

[Vicamo Yang [:vicamo][:vyang]]

According to 3GPP 23.040 section 9.2.3.6, "The MS increments TP-MR by 1 for each SMS-SUBMIT or SMS-COMMAND being submitted." Note that Android still does not implement this feature by now and writes zero as b2g does.

The spec continues with "The value to be used for each SMS-SUBMIT is obtained by reading the Last-Used-TP-MR value from the SMS Status data field in the (U)SIM and incrementing this by 1." This somehow implies a outgoing queue. Android does not implement this.

"In the case where no response or an RP-ERROR with an appropriate cause value is received in response to an SMS-SUBMIT, then the MS shall automatically repeat the SMS-SUBMIT but must use the same TP-MR value and set the TP-RD bit to 1." Android does implement retry, but TP-RD is not set accordingly.

"The SMS-STATUS-REPORT also contains a TP-MR field. The value sent to the MS shall be the same as the TP-MR value generated by the MS in the earlier SMS-SUBMIT or SMS-COMMAND to which the status report relates." Android does relates SMS-STATUS-REPOST pdu to a SMS-SUBMIT one by turning on TP-SRR when user app invoke send functions with delivery intents.

Comment 1

[Vicamo Yang [:vicamo][:vyang]]

I don't think this feature should be implemented in near future. Besides, modem may override TP-MR setting and leave our own implementation, if there will be, meaningless.