Invalidity dossier
US 6725046
Frequency list implemented using a plurality of basic frequencies and bit maps for use in a GSM system
Current assignee: Intellectual Discovery Co Ltd
Added 9/21/2026, 3:58:36 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US6725046B2
Title: Frequency list implemented using a plurality of basic frequencies and bit maps for use in a GSM system
Patent number: US6725046B2 | Application: US09/752,597
Inventor: Hong-Ju Park
Original assignee: Samsung Electronics Co., Ltd.
Current assignee (as listed): Intellectual Discovery Co., Ltd.
Priority date: 1999-12-31 | Filing date: 2000-12-28 | Grant date: 2004-04-20
Legal status: Expired – Fee Related; adjusted expiration 2022-04-18
Purpose: In a GSM system, a mobile terminal receives frequency information about hopping and neighboring cells. Conventional coding formats (GSM Standard No. 04.08 J.3) trade off the number of frequencies against the range of frequencies: bit map 0 and the variable bit map express many frequencies but over a restrictive range, while the 1024, 512, 256 and 128 formats cover wide ranges but few frequencies. Transmitting, say, 32 frequencies within a 1024 range conventionally required at least two formats sent separately. The invention aims to increase system resource efficiency by conveying more frequencies over a wider range in one format.
Plain-language scope (from the excerpt): The frequency format has first information defining a frequency list in a first octet; second information defining the list length in a second octet; first and second format IDs in a specific part of a third octet; a plurality of basic frequencies (ArfcnA, ArfcnB, …) occupying the remaining bits through the last octet; and a plurality of bit maps each arranged between the basic frequencies. Each bit map bit indicates a frequency N bits away from a basic frequency (e.g., ArfcnA+1, ArfcnA+N), with expressions taken modulo 1024. The number of basic frequencies varies with list length (assumed 16 octets) and the number of intervening bit maps. Format IDs must not overlap existing GSM format IDs to preserve compatibility.
Not established by the excerpt: the full claim set (including claim 1), the complete number and exact wording of claims, dependent-claim structure, the figures' content in detail, the exact numeric format-ID values, and the full text of any omitted portion. The excerpt is a partial rendering of the Google Patents page.
Source: https://patents.google.com/patent/[US6725046](/patent/US6725046)/en
Generated 10/1/2026, 10:00:48 PM
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Assignment history
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Prior art
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Obviousness
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Derivative works
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