# How Mobile Devices Automatically Manage Data Retransmission Errors

> A method for mobile devices to efficiently track and fix data transmission errors by mathematically assigning ID tags to recurring data packets.

- **Patent:** US RE50045
- **Original title:** USRE50045E1 - Apparatus and method for transmitting and receiving packets in a mobile communication system supporting hybrid automatic repeat request
- **Owner:** Samsung Electronics Co Ltd
- **Granted:** 2024
- **Status:** Active
- **Times cited:** 0
- **Field:** telecommunications, semiconductors

## What it does

When a phone receives data, some packets might arrive corrupted. This patent describes a system where the network and the phone agree on a mathematical formula to label these data packets using a HARQ process ID. By using the timing of the transmission and the interval of the resource allocation, the device can automatically calculate which ID belongs to which packet. This allows the device to correctly combine a failed initial transmission with a later retransmission to successfully decode the data.

## What it does NOT cover

- Does not cover data transmission methods that do not use semi-persistent resource allocation
- Does not cover error correction methods that rely solely on forward error correction without retransmission
- Does not cover the physical hardware design of the antennas or radio frequency transceivers

## The clever bit

Instead of sending a unique ID for every single packet, the system uses a deterministic formula (HARQ process ID = s modulo n) that allows both the transmitter and receiver to calculate the ID independently based on time, saving precious bandwidth.

## Real-world examples

1. 4G LTE mobile data connections
2. 5G NR mobile communication systems
3. Voice over LTE (VoLTE) packet management

## Why it matters

This technology is essential for maintaining stable connections in mobile networks like 4G LTE and 5G. By automating the identification of data packets, it reduces the amount of control information the network needs to send, which saves battery life and improves data throughput for users.

## Frequently asked questions

### What does How Mobile Devices Automatically Manage Data Retransmission Errors cover?

A method for mobile devices to efficiently track and fix data transmission errors by mathematically assigning ID tags to recurring data packets.

### Who owns patent US RE50045?

Samsung Electronics Co Ltd owns this patent, granted in 2024.

### When does this patent expire?

This patent is expected to expire on July 16, 2044, when the invention enters the public domain.

### What problem does this patent solve?

This technology is essential for maintaining stable connections in mobile networks like 4G LTE and 5G. By automating the identification of data packets, it reduces the amount of control information the network needs to send, which saves battery life and improves data throughput for users.

### What does this patent NOT cover?

Does not cover data transmission methods that do not use semi-persistent resource allocation

**Full plain-English explainer:** https://patentbrief.org/patent/us/RE50045/vacuum-insulated-tumbler-quencher

**Original patent:** https://patents.google.com/patent/USRE50045

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._