Patent EP1037481A1 successfully refreshed from Google Patents.
EP1037481A1
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Simultaneous transmission of random access bursts
Assignee: Sony Deutschland GmbH
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Filing: 1999-03-15
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Granted: —
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Expires: 2019-03-15
Abstract
Abstract The present invention relates to an apparatus for transmitting and receiving signals in a code division multiple access telecommunication system and a method for transmitting random access bursts in a code division multiple access telecommunication system. In the code division multiple access telecommunication system, a random access channel for the transmission of random access bursts is provided, whereby a random access burst comprises a preamble part and a message part. The apparatus (1) according to the present invention comprises generating means (2) for generating random access bursts, whereby the preamble part of a random access burst has a first and a second allocated code and the message part of the same random access burst has a first and a second allocated code, whereby the message part codes are determined on the basis of the preamble codes. The apparatus (1) according to the present invention further comprises transmitting means (5) for transmitting generated random access bursts. The means (5) for transmitting random access bursts are adapted to transmit at least two random access bursts simultaneously, whereby random access bursts to be transmitted simultaneously are generated by the generating means (2) so that the preamble parts thereof differ in at least one code. The first code of the preamble part of a random access burst might be a signature code and the second code of the preamble part of a random access burst might be a spreading code. The first code of a message part of a random access burst might be a spreading code and the second code of a message part of a random access burst might be a scrambling code. The apparatus (1) and the method according to the present invention enable the transmission of a higher data rate on the random access channel without necessitating an increase of the time duration of a random access burst.
Inventors
- 👤 Richard Sony Int. Europe GmbH Stirling-Gallacher
- 👤 Ralf Sony Int. Europe GmbH Böhnke
- 👤 John Sony Int. Europe GmbH Halton
- 👤 Seiichi Sony Int. Europe GmbH Izumi
- 👤 Paul Sony Int. Europe GmbH James
- 👤 Jens-Uwe Sony Int. Europe GmbH Jürgensen
- 👤 Stefan c/o Sony Int. Kornprobst (Europe) GmbH
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:10
CPC Classifications
H; H04; H04J; H04J13/00; H04J13/0007; H04J13/004; H04J13/0044; H04J13/16; H04J13/18; H04J13/20; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2628; H04B7/2637; H04B7/264
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
160 words
Apparatus (1) for transmitting and receiving signals in a code division multiple
access telecommunication system, in which a random access channel for the
transmission of random access bursts is provided, whereby a random access burst comprises a preamble part and a message part,
with generating means (2) for generating random access bursts, whereby the preamble part
of a random access burst has a first and a second allocated code and the message part of
the same random access burst has a first and a second allocated code, whereby the
message part codes are determined on the basis of the preamble codes, and transmitting means (5) for transmitting generated random access bursts, characterized in, that said means (5) for transmitting random access bursts are adapted to transmit at least
two random access bursts simultaneously, whereby random access bursts to be
transmitted simultaneously are generated by said generating means (2) so that the
preamble parts thereof differ in at least one code.
Claim 2
Dependent Claim
57 words
Apparatus (1) for transmitting and receiving signals in a code division multiple
access telecommunication system according to claim 1, characterized in, that said first code allocated to a preamble part of a random access burst is a signature
code comprised in said preamble part and said second code allocated to a preamble part
is a spreading code.
Claim 3
Dependent Claim
75 words
Apparatus (1) for transmitting and receiving signals in a code division multiple
access telecommunication system according to claim 2, characterized in, that said first code allocated to a message part of a random access burst is a spreading
code determined on the basis of the signature code of the preamble part and the second
code of the message part is a scrambling code determined on the basis of the spreading
code of the preamble part.
Claim 4
Dependent Claim
47 words
Apparatus (1) for transmitting and receiving signals in a code division multiple
access telecommunication system according to claim 2 or 3, characterized in, that said generating means (2) generates random access bursts to be transmitted
simultaneously so that the preamble parts thereof differ in the signature codes.
Claim 5
Dependent Claim
78 words
Apparatus (1) for transmitting and receiving signals in a code division multiple
access telecommunication system according to claim 4, characterized in, that said telecommunication system is a cellular system in which only one spreading
code is allocated for the preamble of the random access channel in each cell in the
system, whereby said generating means (2) generates all random access bursts using the
common spreading code of the respective cell as said spreading code for the preamble
parts.
Claim 6
Dependent Claim
47 words
Apparatus (1) for transmitting and receiving signals in a code division multiple
access telecommunication system according to claim 2 or 3, characterized in, that said generating means (2) generates random access bursts to be transmitted
simultaneously so that the preamble parts thereof differ in the spreading codes.
Claim 7
Dependent Claim
77 words
Apparatus (1) for transmitting and receiving signals in a code division multiple
access telecommunication system according to claim 6, characterized in, that said telecommunication system is a cellular system in which at least two spreading
codes are allocated to each cell in the system, whereby said generating means (2)
generates random access bursts to be transmitted simultaneously using the at least two
spreading codes of the respective cell as said spreading codes for the respective
preamble parts.
Claim 8
Dependent Claim
46 words
Apparatus (1) for transmitting and receiving signals in a code division multiple
access telecommunication system according to one of the claim 2 to 7, characterized in, that said generating means (2) randomly chooses the signature code of a preamble from
a plurality of predetermined signature codes.
Claim 9
Dependent Claim
128 words
Method for transmitting random access bursts in a code division multiple access
telecommunication system, in which a random access channel for the transmission of
random access bursts is provided, whereby a random access burst comprises a preamble part and a message part, comprising the steps of generating random access bursts, whereby the preamble part of a random access burst
has a first and a second allocated code and the message part of the same random access
burst has a first and a second allocated code, whereby the message part codes are
determined on the basis of the preamble codes, and transmitting generated random access bursts, characterized in, that at least two random access bursts are transmitted simultaneously, whereby the
preamble parts thereof differ in at least one code.
Claim 10
Dependent Claim
56 words
Method for transmitting random access bursts in a code division multiple access
telecommunication system according to claim 9, characterized in, that said first code allocated to a preamble part of a random access burst is a signature
code comprised in said preamble part and said second code allocated to a preamble part
is a spreading code.
Claim 11
Dependent Claim
74 words
Method for transmitting random access bursts in a code division multiple access
telecommunication system according to claim 10, characterized in, that said first code allocated to a message part of a random access burst is a spreading
code determined on the basis of the signature code of the preamble part and the second
code of the message part is a scrambling code determined on the basis of the spreading
code of the preamble part.
Claim 12
Dependent Claim
38 words
Method for transmitting random access bursts in a code division multiple access
telecommunication system according to claim 10 or 11, characterized in, that preamble parts of random access bursts to be transmitted simultaneously differ in
the signature codes.
Claim 13
Dependent Claim
74 words
Method for transmitting random access bursts in a code division multiple access
telecommunication system according to claim 12, characterized in, that said telecommunication system is a cellular system in which only one spreading
code is allocated for the preamble of the random access channel in each cell in the
system, whereby in all random access bursts the common spreading code of the
respective cell is used as said spreading code for the preamble parts.
Claim 14
Dependent Claim
39 words
Method for transmitting random access bursts in a code division multiple access
telecommunication system according to claim 10 or 11, characterized in, that the preamble parts of random access bursts to be transmitted simultaneously differ
in the spreading codes.
Claim 15
Dependent Claim
73 words
Method for transmitting random access bursts in a code division multiple access
telecommunication system according to claim 14, characterized in, that said telecommunication system is a cellular system in which at least two spreading
codes are allocated to each cell in the system, whereby in random access bursts to be
transmitted simultaneously said at least two spreading codes of the respective cell are
used as said spreading codes for the respective preamble parts.
Claim 16
Dependent Claim
42 words
Method for transmitting random access bursts in a code division multiple access
telecommunication system according to one of the claim 10 to 15, characterized in, that the signature code of a preamble is randomly chosen from a plurality of
predetermined signature codes.
References Cited (Backward Citations)
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