US 8019332

US Patent 8019332, titled "Method for transmitting and receiving control information through PDCCH," was originally assigned to LG Electronics Inc. and is currently assigned to HPS Investment Partners LLC. The inventors are Dae Won Lee, Ki Jun Kim, Dong Wook Roh, Yu Jin Noh, Joon Kui Ahn, and Jung Hoon Lee. The application was filed on December 8, 2010, and the patent was issued on September 13, 2011.

Abstract Overview:
The patent describes a method for efficient transmission and reception of control information via a Physical Downlink Control Channel (PDCCH). This method involves User Equipment (UE) decoding control information within "search spaces," each defined by a specific start position in a subframe. The start position is determined by a two-step modulo operation: first, on an input value using a predetermined constant (D) to get a first result, and then on a value corresponding to that first result using a variable (C), which is the number of candidate start positions. This approach helps multiple UEs receive PDCCHs without collisions.

Independent Claims Overview:

• Claim 1: Method for decoding control information by a User Equipment (UE)
  This claim describes a UE receiving a PDCCH at subframe 'k' and decoding PDCCH candidates within a search space. Each candidate consists of 'L' Control Channel Elements (CCEs). The 'L' CCEs for a specific PDCCH candidate start contiguously from a position determined by a variable Yk and a modulo 'C' operation, where C = floor(N/L) (N is the total CCEs in subframe 'k', L is the number of CCEs per candidate). The variable Yk is generated iteratively using the formula Yk = (A * Yk-1) mod D, where A and D are predefined constants.

  • Plain-language overview: A user's device (UE) finds control signals (PDCCHs) by looking in a specific "search space" during a time slot (subframe 'k'). This search space is made up of groups of control units (CCEs), where each group has 'L' CCEs. The starting point of these groups is calculated using a special formula: it depends on a previous calculation (Yk-1), multiplied by a constant (A), and then adjusted using two remainder operations (modulo D and modulo C). The constant C is essentially the total available CCEs divided by the size of the CCE group (L).

• Claim 6: User Equipment (UE) for decoding control information
  This claim defines a User Equipment (UE) with a receiver and a decoder that performs the method described in Claim 1. The receiver gets the PDCCH at subframe 'k', and the decoder processes PDCCH candidates within a search space, each having 'L' CCEs. The starting position for the 'L' CCEs of a specific candidate is determined by Yk and a modulo 'C' operation, with C = floor(N/L). The Yk variable is defined by Yk = (A * Yk-1) mod D, where A and D are predetermined constant values.

  • Plain-language overview: This claim is for a mobile device (UE) itself, equipped with a receiver and a decoder. It functions by following the method outlined in Claim 1, meaning it uses the same mathematical steps involving Yk, and modulo operations with constants A, D, and C, to locate and decode control signals in its assigned search space.

• Claim 11: Method for transmitting control information by a base station
  This claim describes a base station transmitting a PDCCH to a UE at subframe 'k'. The PDCCH contains a set of PDCCH candidates, each with 'L' CCEs, within a search space. The 'L' CCEs for a specific PDCCH candidate are contiguously located from a position derived using the variable Yk for subframe 'k' and a modulo 'C' operation, where C = floor(N/L). The variable Yk is defined by Yk = (A * Yk-1) mod D, where A and D are predetermined constant values.

  • Plain-language overview: This claim focuses on how a base station sends the control signals. The base station transmits PDCCHs, arranging the control unit groups (CCEs) for each user's device in a way that matches the calculation method described in Claim 1. This ensures that the base station and the UE use the same starting point for their search spaces, calculated with Yk and modulo operations involving constants A, D, and C.

CAFC 2026 Dockets:
I did not find any specific CAFC 2026 dockets directly referencing patent US8019332 in the provided search results. The CAFC search results were general listings of scheduled cases for May, June, and July 2026, without specific patent numbers mentioned in the snippets. Therefore, I cannot confirm any ongoing litigation for this specific patent in CAFC dockets for 2026 based on the provided information.US Patent 8019332: Method for Transmitting and Receiving Control Information Through PDCCH

Title: Method for transmitting and receiving control information through PDCCH
Assignee: HPS Investment Partners LLC (Current Assignee), LG Electronics Inc. (Original Assignee)
Inventors: Dae Won Lee, Ki Jun Kim, Dong Wook Roh, Yu Jin Noh, Joon Kui Ahn, Jung Hoon Lee
Filing Date: December 8, 2010
Issue Date: September 13, 2011

Abstract:
The patent describes a method for efficient transmission and reception of control information via a Physical Downlink Control Channel (PDCCH). This method involves a User Equipment (UE) decoding control information within "search spaces," each defined by a specific start position in a subframe. The start position is determined by a two-step modulo operation: first, on an input value using a predetermined constant (D) to calculate a first result value, and then a modulo operation according to a predetermined variable (C) (which represents the number of candidate start positions) is performed on a value corresponding to the calculated first result value to calculate a second result value. An index position corresponding to this second result value is used as the specific start position. This technique aims to enable multiple UEs to efficiently receive PDCCHs without collisions.

Plain-Language Overview of Independent Claims:

• Claim 1: Method for decoding control information by a User Equipment (UE)
  This claim outlines a process for a user's device (UE) to receive and decode control information transmitted via a PDCCH in a specific time slot (subframe 'k'). The UE decodes a set of potential PDCCH messages (PDCCH candidates) within a designated "search space." Each of these PDCCH candidates is composed of 'L' Control Channel Elements (CCEs) that are located consecutively. The starting position of these 'L' CCEs is determined by a calculation involving a variable Yk for the current subframe 'k' and a modulo 'C' operation. The value 'C' is defined as the largest integer less than or equal to the total number of CCEs ('N') in the subframe divided by 'L' (floor(N/L)). The variable Yk itself is generated through an iterative formula: Yk = (A * Yk-1) mod D, where 'A' and 'D' are fixed, pre-established constants, and Yk-1 refers to the variable from the previous subframe.

• Claim 6: User Equipment (UE) for decoding control information
  This claim describes the User Equipment (UE) hardware itself, designed to perform the method detailed in Claim 1. The UE includes a receiver to obtain the PDCCH from a base station at subframe 'k' and a decoder to process the PDCCH candidates within the specified search space. Similar to Claim 1, each candidate consists of 'L' CCEs, and their contiguous starting position is determined using the variable Yk and a modulo 'C' operation, where C = floor(N/L). The Yk variable is derived from the iterative formula Yk = (A * Yk-1) mod D, utilizing predetermined constant values 'A' and 'D'.

• Claim 11: Method for transmitting control information by a base station
  This claim describes the base station's method for transmitting control information. The base station sends a PDCCH to a UE at subframe 'k', where this PDCCH includes a set of PDCCH candidates, each comprising 'L' CCEs within a search space. Crucially, the 'L' CCEs for a particular PDCCH candidate are arranged contiguously from a position that is calculated using the variable Yk for subframe 'k' and a modulo 'C' operation. As in the preceding claims, 'C' is determined as floor(N/L), and Yk is defined by the iterative equation Yk = (A * Yk-1) mod D, with 'A' and 'D' being predetermined constant values. This ensures the base station transmits the control information in a manner consistent with how the UE is configured to decode it.

CAFC 2026 Dockets:
Based on the searches conducted, no specific dockets or scheduled cases directly referencing US patent 8019332 within the U.S. Court of Appeals for the Federal Circuit (CAFC) for the year 2026 were found. The search results provided general information about CAFC case law and scheduled cases but did not include any direct matches for patent US8019332.