公开(公告)号：DE69929504T2

公开(公告)日：2006-08-17

申请号：DE69929504

申请日：1999-11-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MOOI CHOO CHUAH ,  ON-CHING YUE ,  QINQING ZHANG

IPC: A41C3/00 ,  A41C3/10 ,  A41C3/12 ,  A41C3/14 ,  A61B19/00 ,  A61F5/00 ,  A61F5/01 ,  A61F5/03 ,  A61F5/042 ,  H04B7/204 ,  H04J3/00 ,  H04W74/08

Abstract: The present invention provides an improved RACH access burst arrangement and frame structure. That is, the invention provides methods and apparatus for supporting more than one access burst length in the UMTS access channel structure. Preferably, two access burst lengths are supported, e.g., 5 ms and 10 ms. Such an arrangement is advantageous in applications where it is beneficial to have fast access latency such as, for example, voice or other forms of real-time traffic. Also, the invention provides methods and apparatus for supporting multiple frame sizes. It is to be appreciated that further enhancement to access latency can be obtained by having the UMTS physical layer support multiple frame sizes. The access burst signal transmitted by a remote terminal over the RACH may be an access request or data packets in the case where the RACH is being utilized for UMTS short message services.

公开(公告)号：DE69929504D1

公开(公告)日：2006-04-06

申请号：DE69929504

申请日：1999-11-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MOOI CHOO CHUAH ,  ON-CHING YUE ,  QINQING ZHANG

IPC: A41C3/00 ,  A41C3/10 ,  A41C3/12 ,  A41C3/14 ,  A61B19/00 ,  A61F5/00 ,  A61F5/01 ,  A61F5/03 ,  A61F5/042 ,  H04B7/204 ,  H04J3/00 ,  H04W74/08

Abstract: The present invention provides an improved RACH access burst arrangement and frame structure. That is, the invention provides methods and apparatus for supporting more than one access burst length in the UMTS access channel structure. Preferably, two access burst lengths are supported, e.g., 5 ms and 10 ms. Such an arrangement is advantageous in applications where it is beneficial to have fast access latency such as, for example, voice or other forms of real-time traffic. Also, the invention provides methods and apparatus for supporting multiple frame sizes. It is to be appreciated that further enhancement to access latency can be obtained by having the UMTS physical layer support multiple frame sizes. The access burst signal transmitted by a remote terminal over the RACH may be an access request or data packets in the case where the RACH is being utilized for UMTS short message services.

公开(公告)号：DE602005002001T2

公开(公告)日：2008-05-08

申请号：DE602005002001

申请日：2005-09-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： QI BI ,  DONGZHE CUI ,  QINQING ZHANG

IPC: H04L1/20 ,  H04B7/005

Abstract: Data communication includes an estimate of packet error rate that is useful, for example, when there is insufficient data transmission to provide a direct measurement of packet error rate. At least one pilot channel output provides a basis to determine an estimated packet error rate. One example includes using a pilot channel ratio of an energy-per-chip to a noise spectrum density. Another example includes using a pilot symbol error rate from the pilot channel as the basis for determining the traffic channel packet error rate.