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Dear Joseph and
colleagues,
Thank you for taking your time to work for
the requirements.
But I still have two concerns on the
current requirement statement of
4.1.10 packet error rate. One:
If I understand the desciption of 4.1.10 subsection correctly, the mentioned packet errors mean errors over the air. In this case, packets from the higher layer are segmented usually at MAC (Multiple Access Control) layer into frames in a certain size for the efficient transmisson over the radio channel. The terminology of Frame Error Rate(FER) would be better than Packet Error Rate(PER). Two:
To my understanding, MBWA system will support diverse services of which characteristics can be very different from viewpoint of delay and error rate. We can consider, for instance, two services of VoIP and data services. In case of VoIP service, FER needs to be tightly controlled below a certain threshold and retransmission of frames may not be allowed. In case of data service, FER can be less strict in order to maximize throughput over the air. Thus, I would like to propose that the
terminology of "Packet Error Rate" in
subsection 4.1.10 be replaced to "Frame Error Rate" and that the last sentence in 4.1.10 ("The packet error rate for...") be deleted, which is also proposed by John Fan and other colleagues in the previous mail. Best regards, Jin
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Jin Weon Chang, Ph. D. Senior Engineer Global Standards and Strategy
Team
Samsung Electronics Co., Ltd. Tel: +82-31-279-5117 Pcs: +82-16-384-7017 Fax: +82-31-279-5130 jwchang1@samsung.com -------------------------------------------------------------------------------------------------
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