EP0964599A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Handing off a wireless terminal without changing active channels
Assignee: Nokia of America Corp
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Filing: 1999-05-26
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Granted: —
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Expires: 2019-05-26
Abstract
Abstract A wireless telecommunications system is disclosed that hands off a wireless terminal from one base station to another as the wireless terminal moves within a wireless telecommunications system. Each pair of communications channels (forward and reverse) that are used by the system for communication with a specific wireless terminal are not associated with a specific base station. Instead, the pair of communications channels are associated with the wireless terminal and are used by the wireless terminal both before and after a hand off. Before the hand off, the wireless terminal uses the pair of communications channels for communicating with a first base station. To accomplish the hand off to a second base station, the first base station stops using the communications channels at the same time that the second base station starts using them. Although the wireless terminal is handed off from the first base station to the second base station, re-tuning of the wireless terminal is not required.
Inventors
- 👤 Alex Matusevich
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 04:29
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/0005; H04W36/0055; H04W36/0072; H04W36/08; H04W36/083; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2662; H04B7/2671; H04B7/2678; H04B7/2687; H04B7/269
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
76 words
A method comprising: transmitting a prior forward channel portion of a call to a wireless
terminal in a forward channel from a first base station; and transmitting a later forward channel portion of said call to said wireless
terminal in said forward channel from a second base station: wherein the transmission of said prior forward channel portion of said
call ends concurrently with the beginning of transmission of said later forward channel
portion of said call.
Claim 2
Dependent Claim
83 words
The method of claim 1 further comprising the steps of: receiving a prior reverse channel portion of said call from said wireless
terminal in a reverse channel via said first base station; and receiving a later reverse channel portion of said call from said wireless
terminal in said reverse channel via said second base station; wherein the reception of said prior reverse channel portion of said call
ends concurrently with the beginning of reception of said later reverse channel portion
of said call.
Claim 3
Dependent Claim
88 words
A wireless telecommunications system comprising: a first base station for transmitting a prior forward channel portion of a
call to a wireless terminal in a forward channel from a first base station; and a second base station for transmitting a later forward channel portion of
said call to said wireless terminal in said forward channel from a second base station; wherein the transmission of said prior forward channel portion of said
call ends concurrently with the beginning of transmission of said later forward channel
portion of said call.
Claim 4
Dependent Claim
53 words
A method as claimed in claim 1, or a system as claimed in claim 3,
wherein said first base station services a first cell, said second base station services a
second cell. and the transmission of said prior forward channel portion of said call ends
when said wireless terminal leaves said first cell.
Claim 5
Dependent Claim
48 words
A method as claimed in claim 1, or a system as claimed in claim 3,
wherein said forward channel is a time-division multiplexed channel and said prior
forward channel portion and said later forward channel portion of said call occupy the
same time-slot in said time-division multiplexed channel.
Claim 6
Dependent Claim
48 words
A method as claimed in claim 1, or a system as claimed in claim 3,
wherein said forward channel is a code-division multiplexed channel and said prior
forward channel portion and said later forward channel portion of said call use the same
code in said code-division multiplexed channel.
Claim 7
Dependent Claim
87 words
The wireless telecommunications system of claim 3 further
comprising: a wireless switching center for receiving a prior reverse channel portion
of said call from said wireless terminal in a reverse channel via said first base station;
and receiving a later reverse channel portion of said call from said wireless terminal in
said reverse channel via said second base station; wherein the reception of said prior reverse channel portion of said call
ends concurrently with the beginning of reception of said later reverse channel portion
of said call.
Claim 8
Dependent Claim
36 words
A method as claimed in claim 2, or a system as claimed in claim 7,
wherein the reception of said prior reverse channel portion of said call ends when said
wireless terminal leaves said first cell.
Claim 9
Dependent Claim
50 words
A method as claimed in claim 2, or a system as claimed in claim 7,
wherein said reverse channel is a time-division multiple access channel and said prior
forward channel portion and said later forward channel portion of said call occupy the
same time-slot in said time-division multiple access channel.
Claim 10
Dependent Claim
50 words
A method as claimed in claim 2, or a system as claimed in claim 7,
wherein said reverse channel is a code-division multiple access channel and said prior
forward channel portion and said later forward channel portion of said call use the same
code in said code-division multiple access channel.
Claim 11
Independent Claim
76 words
A method comprising: receiving a prior reverse channel portion of a call from a wireless
terminal in a reverse channel via a first base station; and receiving a later reverse channel portion of said call from said wireless
terminal in said reverse channel via a second base station; wherein the reception of said prior reverse channel portion of said call
ends concurrently with the beginning of reception of said later reverse channel portion
of said call.
Claim 12
Dependent Claim
83 words
The method of claim 11 further comprising the steps of: transmitting a prior forward channel portion of said call to said wireless
terminal in a forward channel from said first base station; and transmitting a later forward channel portion of said call to said wireless
terminal in said forward channel from said second base station; wherein the transmission of said prior forward channel portion of said
call ends concurrently with the beginning of transmission of said later forward channel
portion of said call.
Claim 13
Dependent Claim
83 words
A wireless telecommunications system comprising: a wireless switching center for receiving a prior reverse channel portion
of a call from a wireless terminal in a reverse channel via a first base station; and
receiving a later reverse channel portion of said call from said wireless terminal in said
reverse channel via a second base station; wherein the reception of said prior reverse channel portion of said call
ends concurrently with the beginning of reception of said later reverse channel portion
of said call.
Claim 14
Dependent Claim
54 words
A method as claimed in claim 11, or a system as claimed in claim
13, wherein said first base station services a first cell, said second base station services a
second cell, and wherein the reception of said prior reverse channel portion of said call
ends when said wireless terminal leaves said first cell.
Claim 15
Dependent Claim
50 words
A method as claimed in claim 11, or a system as claimed in claim
13, wherein said reverse channel is a time-division multiple access channel and said
prior forward channel portion and said later forward channel portion of said call occupy
the same time-slot in said time-division multiple access channel.
Claim 16
Dependent Claim
50 words
A method as claimed in claim 11, or a system as claimed in claim
13, wherein said reverse channel is a code-division multiple access channel and said
prior forward channel portion and said later forward channel portion of said call use the
same code in said code-division multiple access channel.
Claim 17
Dependent Claim
89 words
The wireless telecommunications system of claim 13 wherein: said first base station transmits a prior forward channel portion of said
call to said wireless terminal in a forward channel from a first base station; and said second base station transmits a later forward channel portion of said
call to said wireless terminal in said forward channel from a second base station; wherein the transmission of said prior forward channel portion of said
call ends concurrently with the beginning of transmission of said later forward channel
portion of said call.
Claim 18
Dependent Claim
36 words
A method as claimed in claim 12, or a system as claimed in claim
17, wherein the transmission of said prior forward channel portion of said call ends
when said wireless terminal leaves said first cell.
Claim 19
Dependent Claim
48 words
A method as claimed in claim 12, or a system as claimed in claim
17, wherein said forward channel is a time-division multiplexed channel and said prior
forward channel portion and said later forward channel portion of said call occupy the
same time-slot in said time-division multiplexed channel.
Claim 20
Dependent Claim
48 words
A method as claimed in claim 12, or a system as claimed in claim
17, wherein said forward channel is a code-division multiplexed channel and said prior
forward channel portion and said later forward channel portion of said call use the same
code in said code-division multiplexed channel.
References Cited (Backward Citations)
No citation records indexed.
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