(Merging and continuation of part of Questions 9/12 and 12/12 studied in 1997 - 2000)

Type of question

Task oriented, leading to new and revised ITU-T Recommendations.

Background

Previous work has been focused on digital handset and hands-free terminals (P.310, P.311, P.341, P.342) for both narrow and wide telephone bands (300 � 3400 Hz and 50 � 7000 Hz) and a first Recommendation for mobile handset mode terminals (P.313).

Additional results were achieved for the hands-free mode of operation (P.340).

The work on the follower of P.35 can be finalised very soon (P.350). It takes also into account small terminal design used in modern mobile and cordless terminals.

Multi Rate Codecs for both narrow band and wide band mainly for the use in mobile networks are defined.

Sales of cordless and mobile terminals have increased to such an extent that they are a significant proportion of the total telephone population and new features, already implemented in corded terminals will be introduced in mobile terminals.

Since there are more than one operator in an increasing number of countries, it is observed that a competition on offered services takes place. Therefore it is an urgent need from the market for standardization multimedia terminals connected to circuit-switched networks. For the speech transmission part, coding schemes of the G.71x- and G.72x-Series are considered.

First use of new access techniques like power line access can be noted.

Text of the question

considering

a) that cordless and mobile terminals are a substantial proportion of the telephone population;

b) that cordless and mobile terminals are often used in noisy environments;

c) that there is need for standardization of hands free cordless and mobile terminals;

d) that the influence of new Multi Rate Codecs for narrow band and wide band on the transmission requirements has not been studied in the past to a satisfactory extent;

e) that there is a need for recommendations on the speech transmission part of multimedia terminals connected to circuit-switched networks and mobile networks;

f) that there is a need for recommendations on speech transmission requirements for terminals using power line access techniques;

g) that the work on P.350 needs to be finalized;

h) that the methodological issues are dealt within specific questions,

the following questions should be studied:

1) What transmission characteristics and measurement methods are needed for cordless and mobile hands-free terminals?

2) What transmission characteristics and measurement methods are needed for cordless and mobile terminals using Multi Rate Codecs for narrow band and wide band applications?

3) What transmission characteristics and other speech related features are needed for multimedia terminals connected to circuit-switched and mobile networks, and what are the measurement methods?

4) What transmission characteristics and measurement methods are needed for terminals using new access techniques (e.g. power line access)?

5) What reference points, interfaces and measurement positions for new access techniques need to be standardized?

6) What changes and/or improvements can be done for the existing Recommendations P.310, P.311, P.313, P.341 and P.342?

7) What changes and improvements can be done for the existing Recommendation P.30?

NOTE - Information can be found in ETSI ETS 300 807.

8) What additions to Recommendation P.35 should be given for small handset designs?

Objectives and schedule

New Recommendation on cordless and mobile hands-free terminal.

New Recommendation(s) on the speech characteristics of multimedia terminals.

New Recommendation(s) on cordless and mobile terminals using Multi Rate Codecs.

New Recommendation(s) on terminals using new access techniques (e.g. Power Line Terminals).

Revisions to ITU-T Recommendations P.310, P.311, P.313, P.341 and P.342.

Revision to ITU-T Recommendation P.30

New Recommendation P.350 (follower of P.35)

The estimated time frame is one Study Period.

Relationships with other ITU-T activities

This work needs relationship to other ITU-T activities dealing with:

• IMT-2000
• Codec definitions and multimedia
• Network transmission performance