# US 12,184,575 B2 · System information performance enhancements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,575 B2 - Document ID: US12184575B2 - Status: Granted - Kind: B2 - Application number: 17/806,133 - Filed: 2022-06-09 - Published: 2022-09-22 - Granted: 2024-12-31 - Earliest claimed: 2017-05-13 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Kapil Bhattad; Alberto Rico Alvarino; Hao Xu - Web page: https://patentgrep.com/patent/US12184575B2 ## CPC - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 1/0041: {Arrangements at the transmitter end} - H04L 1/0045: {Arrangements at the receiver end} - H04L 1/0047: {Decoding adapted to other signal detection operation (in conjunction with sequence estimation or equalization H04L25/03286)} - H04L 1/0053: {specially adapted for power saving} - H04L 1/0072: {Error control for data other than payload data, e.g. control data} - H04W 36/0005: {Control or signalling for completing the hand-off} - H04W 36/0055: {Transmission or use of information for re-establishing the radio link} - H04W 36/0072: {of resource information of target access point} - H04W 48/12: using downlink control channel - H04W 48/16: Discovering, processing access restriction or access information - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 36/08: Reselecting an access point - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Wireless communications systems and methods related to system information communications and decoding are provided. In one embodiment, a wireless communication device receives one or more known bits. The wireless communication device receives a first encoded information block. The wireless communication device decodes the first encoded information block to generate a first information block based on the one or more known bits. In one embodiment, a wireless communication device receives a first encoded information block including a first bit pattern. The wireless communication device receives a second encoded information block including a second bit pattern. The wireless communication device jointly decodes the first encoded information block and the second encoded information block based on an assumption that a difference between the first bit pattern and the second bit pattern is within a subset of a plurality of bit-change patterns. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), the method comprising: receiving a first signal carrying a first encoded information block including a first bit pattern associated with an information field; receiving a second signal carrying a second encoded information block including a second bit pattern associated with the information field; determining a probability of occurrence for each bit-change pattern in a subset of a plurality of bit-change patterns associated with the information field, wherein the plurality of bit-change patterns is associated with a system frame number (SFN), and wherein the subset of the plurality of bit-change patterns corresponds to one of the plurality of bit-change patterns indicating a single bit-change at a least significant bit; selecting one or more bit-change patterns from the subset of the plurality of bit-change patterns based on the one or more bit-change patterns having a higher probability of occurrence among the subset of the plurality of bit-change patterns than remaining bit-change patterns in the plurality of bit-change patterns; jointly decoding the first encoded information block and the second encoded information block based on an assumption that a difference between the first bit pattern and the second bit pattern corresponds to the one or more bit-change patterns, wherein the jointly decoding is based on an assumption that the first encoded information block includes an even SFN and the second encoded information block includes an odd SFN; receiving a third signal carrying a third encoded information block including a third bit pattern associated with the information field; and jointly decoding the second encoded information block and the third encoded information block based on an assumption that the second encoded information block includes an even SFN in response to the jointly decoding the first encoded information block and the second encoded information block failing. ### Claim 2 (depends on 1) The method of claim 1, further comprising: selecting the subset of the plurality of bit-change patterns from the plurality of bit-change patterns based on a capability of the UE. ### Claim 3 (depends on 2) The method of claim 2, wherein the capability of the UE comprises at least one of: an amount of memory associated with the UE; or a power consumption associated with the UE. ### Claim 4 (depends on 1) The method of claim 1, wherein: the receiving the first encoded information block includes receiving the first encoded information block from a physical broadcast channel (PBCH) during a first time period; the receiving the second encoded information block includes receiving the second encoded information block from the PBCH during a second time period after the first time period; and the first encoded information block is generated by encoding a first information block and the second encoded information block is generated by encoding a second information block. ### Claim 5 (depends on 1) The method of claim 1, further comprising: determining, from the second signal, a first estimate for the first encoded information block; and determining, from the third signal, a second estimate for the second encoded information block. ### Claim 6 (depends on 5) The method of claim 5, wherein the determining the first estimate and the second estimate includes: demodulating the second signal to produce a first plurality of log-likelihood ratios (LLRs); demodulating the third signal to produce a second plurality of LLRs; and jointly decoding the first plurality of LLRs and the second plurality of LLRs to generate the first estimate and the second estimate based on each bit-change pattern in the subset of the plurality of bit-change patterns. ### Claim 7 (depends on 6) The method of claim 6, wherein the jointly decoding the first plurality of LLRs and the second plurality of LLRs includes: encoding a first bit-change pattern in the subset of the plurality of bit-change patterns based on a linear block code associated with the first encoded information block and the second encoded information block; modifying the first plurality of LLRs based on the encoded first bit-change pattern; and combining the first plurality of LLRs with the second plurality of LLRs. ### Claim 8 A user equipment (UE) comprising: a memory; and at least one processor coupled to the memory, the memory storing instructions that are executable by the at least one processor, wherein the at least one processor is configured to execute the instructions and cause the UE to: receive a first signal carrying a first encoded information block including a first bit pattern associated with an information field; receive a second signal carrying a second encoded information block including a second bit pattern associated with the information field; determine a probability of occurrence for each bit-change pattern in a subset of a plurality of bit-change patterns associated with the information field, wherein: the plurality of bit-change patterns is associated with a system frame number (SFN); the subset of the plurality of bit-change patterns corresponds to one of the plurality of bit-change patterns indicating a single bit-change at a least significant bit; select one or more bit-change patterns from the subset of the plurality of bit-change patterns based on the one or more bit-change patterns having a higher probability of occurrence among the subset of the plurality of bit-change patterns than remaining bit-change patterns in the plurality of bit-change patterns; jointly decode the first encoded information block and the second encoded information block based on an assumption that a difference between the first bit pattern and the second bit pattern corresponds to the one or more bit-change patterns, wherein the jointly decoding is based on an assumption that the first encoded information block includes an even SFN and the second encoded information block includes an odd SFN; receive a third signal carrying a third encoded information block including a third bit pattern associated with the information field; and jointly decode the second encoded information block and the third encoded information block based on an assumption that the second encoded information block includes an even SFN in response to the jointly decoding the first encoded information block and the second encoded information block failing. ### Claim 9 (depends on 8) The UE of claim 8, wherein the UE is further configured to: select the subset of the plurality of bit-change patterns from the plurality of bit-change patterns based on a capability of the UE. ### Claim 10 (depends on 9) The UE of claim 9, wherein the capability of the UE comprises at least one of: an amount of memory associated with the UE; or a power consumption associated with the UE. ### Claim 11 (depends on 8) The UE of claim 8, wherein the UE is further configured to: receive the first encoded information block from a physical broadcast channel (PBCH) during a first time period; and receive the second encoded information block from the PBCH during a second time period after the first time period, wherein the first encoded information block is generated by encoding a first information block and the second encoded information block is generated by encoding a second information block. ### Claim 12 (depends on 8) The UE of claim 8, wherein the UE is further configured to: determine from the second signal, a first estimate for the first encoded information block; and determine from the third signal, a second estimate for the second encoded information block. ### Claim 13 (depends on 12) The UE of claim 12, wherein UE is further configured to: demodulate the second signal to produce a first plurality of log-likelihood ratios (LLRs); demodulate the third signal to produce a second plurality of LLRs; and jointly decode the first plurality of LLRs and the second plurality of LLRs to generate the first estimate and the second estimate based on each bit-change pattern in the subset of the plurality of bit-change patterns. ### Claim 14 (depends on 13) The UE of claim 13, wherein UE is further configured to: encode a first bit-change pattern in the subset of the plurality of bit-change patterns based on a linear block code associated with the first encoded information block and the second encoded information block; modify the first plurality of LLRs based on the encoded first bit-change pattern; and combine the first plurality of LLRs with the second plurality of LLRs. ### Claim 15 A non-transitory computer-readable medium having computer-executable code recorded thereon, the computer-executable code, when executed by one or more processors of a user equipment (UE), causes the UE to: receive a first signal carrying a first encoded information block including a first bit pattern associated with an information field; receive a second signal carrying a second encoded information block including a second bit pattern associated with the information field; determine a probability of occurrence for each bit-change pattern in a subset of a plurality of bit-change patterns associated with the information field, wherein: the plurality of bit-change patterns is associated with a system frame number (SFN); the subset of the plurality of bit-change patterns corresponds to one of the plurality of bit-change patterns indicating a single bit-change at a least significant bit; select one or more bit-change patterns from the subset of the plurality of bit-change patterns based on the one or more bit-change patterns having a higher probability of occurrence among the subset of the plurality of bit-change patterns than remaining bit-change patterns in the plurality of bit-change patterns; jointly decode the first encoded information block and the second encoded information block based on an assumption that a difference between the first bit pattern and the second bit pattern corresponds to the one or more bit-change patterns, wherein the jointly decoding is based on an assumption that the first encoded information block includes an even SFN and the second encoded information block includes an odd SFN; receive a third signal carrying a third encoded information block including a third bit pattern associated with the information field; and jointly decode the second encoded information block and the third encoded information block based on an assumption that the second encoded information block includes an even SFN in response to the jointly decoding the first encoded information block and the second encoded information block failing. ### Claim 16 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the computer-executable code, when executed by the one or more processors, further causes the UE to: select the subset of the plurality of bit-change patterns from the plurality of bit-change patterns based on a capability of the UE. ### Claim 17 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the computer-executable code, when executed by the one or more processors, further causes the UE to: receive the first encoded information block from a physical broadcast channel (PBCH) during a first time period; and receive the second encoded information block from the PBCH during a second time period after the first time period, wherein the first encoded information block is generated by encoding a first information block and the second encoded information block is generated by encoding a second information block.