InterDigital Inc (IDCC)

[techinvester]

IDCC/Nokia ITC Friday session part 4

Ellis and I were let back into the court room at ~11:20 and Mr Lanning (last witness for the day)was on the stand. He was declared as an expert witness in cellular architecture and a Nokia lawyer was directing the questions. The previous Nokia witnesses were being asked questions by IDCC. Since Mr Lanning was a witness for Nokia and the lawyer was from Nokia the interaction between the 2 was very flowing and polished. Mr Lanning had previously created slides defining the history of telephony from Marconi through CDMA. The slides were presented as an overview of the evolution of frequency sharing systems. He then discussed slides previously created showing how digital data is transmitted, digital data transmission using spreading code using 4 bit XOR, and bipolar notation ( +1, -1). He then showed how using spreading code enabled multiple users to transmit simultaneously and that the base station could correlate the users using the composite signal provided the base station knew the users spreading code. He showed the math to create the composite signal. He said that unless a base station knew the users spreading code multiple users could not simultaneously transmit.

Mr Lanning then talked about the CODIT project and RACE. He said Lucas was a part of RACE (it was not clear to me if the Lucas paper was a part of CODIT or Lucas himself). There was also mention of a CODIT final report. (CODIT is new to me. I no nothing of this effort)

Mr Lanning then briefly defined how a wireless local loop (WLL) design works and that it has a tighter timeline.

It appeared to me that Nokia wanted to make the point that a WLL design was different than how a base station has to work for simultaneous use and that Lucas was part of CODIT.

Next Mr Lanning discussed the power ramp up patents. He defined how a pilot signal is sent from a cell phone until an acknowledgement is received and that the signal power is increased until the acknowledgement is received. He gave much more detail but this conveys the point. Mr Lanning next stated he searched the USPTO for a reference of CDMA and the power ramp up patents. He said he could not find a connection. (my term for him not finding a match)

I think Nokia was trying to convey that it would “appear” that the power ramp up patents are not tightly coupled to CDMA in my opinion.