US6498933B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for transmitting data for inter-frequency/inter-system handover in mobile telecommunications system
Assignee: UTStarcom Korea Ltd
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Filing: 2000-05-08
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Granted: 2002-12-24
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Expires: 2020-05-08
Abstract
Abstract A method for transmitting data for inter-frequency/inter-system handover in an asynchronous UTRA mobile telecommunications system, wherein information incapable of being transmitted for an idle period is transmitted over a common channel in the case of the inter-frequency handover or inter-system handover, thereby increasing the quality of speech and more efficiently performing the handover. A base station assigns a common channel to a mobile station connected thereto if inter-frequency (inter-system) handover is requested by the mobile station. Then, the base station transmits information about the assigned common channel to the mobile station and determines whether a transmission frame is an idle frame. The base station transmits data to the mobile station over a dedicated channel if the transmission frame is not the idle frame and over both the dedicated channel and common channel if the transmission frame is the idle frame. If a received frame is the idle frame during data reception, the mobile station receives data from the base station over both the dedicated channel and common channel. Therefore, the present invention has the effect of overcoming a conventional code shortage problem and, because of the assignment of one OVSF code to a common channel, keeping orthogonality with other channels.
Inventors
- 👤 Jae Hong Park
- 👤 Chong Won Lee
- 👤 Yeon Sang Koo
- 👤 Shin Hyun Yang
- 👤 Jeong Hwa Ye
- 👤 Yu Ro Lee
- 👤 Ho Geun Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:06
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/08; H04W36/14; H04W72/00; H04W72/04; H04W72/044; H04W72/0446; H04W72/0453; H04W36/0005; H04W36/0083; H04W36/0085; H04W36/0088
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
155 words
A method for allowing a specific base station to transmit data to a mobile station connected thereto in a mobile telecommunications system when said mobile station attempts inter-frequency (inter-system) handover to a different base station with a different frequency or communication system, comprising the steps of: a) assigning a common channel to said mobile station if said inter-frequency (inter-system) handover is requested by said mobile station and transmitting information about the assigned common channel to said mobile station; b) determining whether a transmission frame is an idle frame and transmitting data to said mobile station over a dedicated channel if said transmission frame is not the idle frame and over both said dedicated channel and common channel if said transmission frame is the idle frame; and c) determining whether said handover has been completed by said mobile station and controlling a call and resources assigned to said mobile station in accordance with the determined result.
Claim 2
Independent Claim
155 words
A method for allowing a specific base station to transmit data to a mobile station connected thereto in a mobile telecommunications system when said mobile station attempts inter-frequency (inter-system) handover to a different base station with a different frequency or communication system, comprising the steps of: a) assigning a common channel to said mobile station if said inter-frequency (inter-system) handover is requested by said mobile station and transmitting information about the assigned common channel to said mobile station; b) determining whether a transmission frame is an idle frame and transmitting data to said mobile station over a dedicated channel if said transmission frame is not the idle frame and over both said dedicated channel and common channel if said transmission frame is the idle frame; and c) determining whether said handover has been completed by said mobile station and controlling a call and resources assigned to said mobile station in accordance with the determined result.
Claim 3
Dependent Claim
237 words
The method as set forth in claim 1 , wherein said step a) includes the steps of: a-1) establishing said call to said mobile station through a call establishing procedure, assigning said dedicated channel to said mobile station and transmitting data to said mobile station over said dedicated channel; a-2) recognizing through an upper protocol message exchange procedure that said mobile station requests said inter-frequency handover to said different base station with the different frequency; a-3) determining whether a common channel in use is present, upon recognizing that said inter-frequency handover is requested; a-4) producing a common channel corresponding to a spreading factor of said mobile station if it is determined at said step a-3) that no common channel in use is present and transmitting information about the produced common channel to said mobile station; a-5) determining whether the common channel in use is divided and available for said mobile station, if it is determined at said step a-3) that the common channel in use is present, and transmitting information about said common channel in use to said mobile station if it is available for said mobile station; and a-6) producing said common channel corresponding to said spreading factor of said mobile station if it is determined at said step a-5) that said common channel in use is not available for said mobile station and transmitting the information about the produced common channel to said mobile station.
Claim 4
Dependent Claim
35 words
The method as set forth in claim 1 , wherein said common channel information contains a start point and length of an idle period in said common channel to be used by said mobile station.
Claim 5
Dependent Claim
135 words
The method as set forth in claim 1 , wherein said step b) includes the steps of: b-1) determining whether said transmission frame is the idle frame; b-2) transmitting data to said mobile station over said dedicated channel if it is determined at said step b-1) that said transmission frame is not the idle frame; and b-3), if it is determined at said step b-1) that said transmission frame is the idle frame, assigning data for an idle period in said idle frame to said common channel, transmitting the assigned data to said mobile station for an active period in said idle frame, transmitting the remaining data in said idle frame to said mobile station over said dedicated channel for said active period and transmitting no data to said mobile station for said idle period.
Claim 6
Dependent Claim
204 words
The method as set forth in claim 1 , wherein said step c) includes the steps of: c-1) determining whether said handover has been completed by said mobile station; c-2) discontinuing said call to said mobile station if it is determined at said step c-1) that said handover has been completed; c-3) determining whether there is present a different mobile station associated with said common channel; c-4) releasing said common channel if it is determined at said step c-3) that there is not present any mobile station associated with said common channel and only said radio resources assigned to said mobile station completing said handoff if it is determined at said step c-3) that there is present the different mobile station associated with said common channel; c-5) advancing a compressed mode operation of said different mobile station; and c-6) determining whether handover of said different mobile station has been completed and returning to said step c-2) to discontinue a call to said different mobile station, if the handover of said different mobile station has been completed, and to said step c-5) to advance said compressed mode operation of said different mobile station, if the handover of said different mobile station has not been completed.
Claim 7
Independent Claim
152 words
A method for allowing a specific base station to transmit data to a mobile station connected thereto in a mobile telecommunications system when said mobile station attempts inter-frequency (inter-system) handover to a different base station with a different frequency or communication system, comprising the steps of: a) assigning a common channel to said mobile station if said inter-frequency (inter-system) handover is requested by said mobile station and transmitting information about the assigned common channel to said mobile station; b) determining whether a transmission frame is an idle frame and transmitting data to said mobile station over a dedicated channel if said transmission frame is not the idle frame and over only said common channel if said transmission frame is the idle frame; and c) determining whether said handover has been completed by said mobile station and controlling a call and resources assigned to said mobile station in accordance with the determined result.
Claim 8
Independent Claim
152 words
A method for allowing a specific base station to transmit data to a mobile station connected thereto in a mobile telecommunications system when said mobile station attempts inter-frequency (inter-system) handover to a different base station with a different frequency or communication system, comprising the steps of: a) assigning a common channel to said mobile station if said inter-frequency (inter-system) handover is requested by said mobile station and transmitting information about the assigned common channel to said mobile station; b) determining whether a transmission frame is an idle frame and transmitting data to said mobile station over a dedicated channel if said transmission frame is not the idle frame and over only said common channel if said transmission frame is the idle frame; and c) determining whether said handover has been completed by said mobile station and controlling a call and resources assigned to said mobile station in accordance with the determined result.
Claim 9
Dependent Claim
239 words
The method as set forth in claim 6 , wherein said step a) includes the steps of: a-1) establishing said call to said mobile station through a call establishing procedure, assigning said dedicated channel to said mobile station and transmitting data to said mobile station over said dedicated channel; a-2) recognizing through an upper protocol message exchange procedure that said mobile station requests said inter-frequency handover to said different base station with the different frequency; a-3) determining whether a common channel in use is present, upon recognizing that said inter-frequency handover is requested; a-4) producing a common channel corresponding to ½ a spreading factor of said mobile station if it is determined at said step a-3) that no common channel in use is present and transmitting information about the produced common channel to said mobile station; a-5) determining whether the common channel in use is divided and available for said mobile station, if it is determined at said step a-3) that the common channel in use is present, and transmitting information about said common channel in use to said mobile station if it is available for said mobile station; and a-6) producing said common channel corresponding to ½ said spreading factor of said mobile station if it is determined at said step a-5) that said common channel in use is not available for said mobile station and transmitting the information about the produced common channel to said mobile station.
Claim 10
Dependent Claim
35 words
The method as set forth in claim 6 , wherein said common channel information contains a start point and length of an idle period in said common channel to be used by said mobile station.
Claim 11
Dependent Claim
116 words
The method as set forth in claim 6 , wherein said step b) includes the steps of: b-1) determining whether said transmission frame is the idle frame; b-2) transmitting data to said mobile station over said dedicated channel if it is determined at said step b-1) that said transmission frame is not the idle frame; and b-3), if it is determined at said step b-1) that said transmission frame is the idle frame, assigning data corresponding to said idle frame to said common channel, transmitting the assigned data to said mobile station for an active period in said idle frame and transmitting no data to said mobile station for an idle period in said idle frame.
Claim 12
Dependent Claim
204 words
The method as set forth in claim 6 , wherein said step c) includes the steps of: c-1) determining whether said handover has been completed by said mobile station; c-2) discontinuing said call to said mobile station if it is determined at said step c-1) that said handover has been completed; c-3) determining whether there is present a different mobile station associated with said common channel; c-4) releasing said common channel if it is determined at said step c-3) that there is not present any mobile station associated with said common channel and only said radio resources assigned to said mobile station completing said handoff if it is determined at said step c-3) that there is present the different mobile station associated with said common channel; c-5) advancing a compressed mode operation of said different mobile station; and c-6) determining whether handover of said different mobile station has been completed and returning to said step c-2) to discontinue a call to said different mobile station, if the handover of said different mobile station has been completed, and to said step c-5) to advance said compressed mode operation of said different mobile station, if the handover of said different mobile station has not been completed.
Claim 13
Independent Claim
144 words
A method for allowing a mobile station to receive data from a specific base station connected thereto in a mobile telecommunications system when said mobile station attempts inter-frequency (inter-system) handover to a different base station with a different frequency or communication system, comprising the steps of: a) establishing a call to said specific base station, receiving data from said specific base station over a dedicated channel and receiving information about a common channel from said specific base station over said dedicated channel upon requesting said inter-frequency handover; and b) determining whether a received frame is an idle frame and receiving data from said specific base station over said dedicated channel if said received frame is not the idle frame and over both said common channel and dedicated channel for an active period in the idle frame if said received frame is the idle frame.
Claim 14
Independent Claim
144 words
A method for allowing a mobile station to receive data from a specific base station connected thereto in a mobile telecommunications system when said mobile station attempts inter-frequency (inter-system) handover to a different base station with a different frequency or communication system, comprising the steps of: a) establishing a call to said specific base station, receiving data from said specific base station over a dedicated channel and receiving information about a common channel from said specific base station over said dedicated channel upon requesting said inter-frequency handover; and b) determining whether a received frame is an idle frame and receiving data from said specific base station over said dedicated channel if said received frame is not the idle frame and over both said common channel and dedicated channel for an active period in the idle frame if said received frame is the idle frame.
Claim 15
Dependent Claim
35 words
The method as set forth in claim 11 , wherein said common channel information contains a start point and length of an idle period in said common channel to be used by said mobile station.
Claim 16
Dependent Claim
113 words
The method as set forth in claim 11 , wherein said step b) includes the steps of: b-1) determining whether said received frame is the idle frame; b-2) receiving data from said specific base station over said dedicated channel if it is determined at said step b-1) that said received frame is not the idle frame; and b-3), if it is determined at said step b-1) that said received frame is the idle frame, receiving data from said specific base station over both said common channel and dedicated channel for said active period in said idle frame and collecting information from said different base station for an idle period in said idle frame.
Claim 17
Independent Claim
141 words
A method for allowing a mobile station to receive data from a specific base station connected thereto in a mobile telecommunications system when said mobile station attempts inter-frequency (inter-system) handover to a different base station with a different frequency or communication system, comprising the steps of: a) establishing a call to said specific base station, receiving data from said specific base station over a dedicated channel and receiving information about a common channel from said specific base station over said dedicated channel upon requesting said inter-frequency handover; and b) determining whether a received frame is an idle frame and receiving data from said specific base station over said dedicated channel if said received frame is not the idle frame and over only said common channel for an active period in the idle frame if said received frame is the idle frame.
Claim 18
Independent Claim
141 words
A method for allowing a mobile station to receive data from a specific base station connected thereto in a mobile telecommunications system when said mobile station attempts inter-frequency (inter-system) handover to a different base station with a different frequency or communication system, comprising the steps of: a) establishing a call to said specific base station, receiving data from said specific base station over a dedicated channel and receiving information about a common channel from said specific base station over said dedicated channel upon requesting said inter-frequency handover; and b) determining whether a received frame is an idle frame and receiving data from said specific base station over said dedicated channel if said received frame is not the idle frame and over only said common channel for an active period in the idle frame if said received frame is the idle frame.
Claim 19
Dependent Claim
35 words
The method as set forth in claim 14 , wherein said common channel information contains a start point and length of an idle period in said common channel to be used by said mobile station.
Claim 20
Dependent Claim
110 words
The method as set forth in claim 14 , wherein said step b) includes the steps of: b-1) determining whether said received frame is the idle frame; b-2) receiving data from said specific base station over said dedicated channel if it is determined at said step b-1) that said received frame is not the idle frame; and b-3), if it is determined at said step b-1) that said received frame is the idle frame, receiving data from said specific base station over only said common channel for said active period in said idle frame and collecting information from said different base station for an idle period in said idle frame.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-12-23 | 2006-06-24 | 2006-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-12-23 | 2010-06-24 | 2010-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-12-23 | 2014-06-24 | 2014-12-24 | $7700.00 | Window Closed / Lapsed |