Method for partial retransmission

#The present disclosure relates to Hybrid Automatic Repeat Request (HARQ), Mobile Broadband (MBB), and Ultra-Reliable Low Latency Communication (URLLC) scheduling.

#A Transport Block (TB) is data from an upper layer, e.g., from the Media Access Controller (MAC), that is given to the physical layer for transmission in a Transmission Time Interval (TTI). A TB may range in size from 16 bits to 36696 bits for a 10 Megahertz (MHz) Long Term Evolution (LTE) system. A TB may be split into Code Blocks (CBs), which have a maximum size of 6144 bits, meaning that the largest TB will have 7 code blocks. A TB Cyclic Redundancy Check (CRC) value is attached to the transport block. If a TB is divided into CBs, a CB CRC is attached to each CB.

#In many wireless communications systems Hybrid Automatic Repeat Request (HARQ) retransmission is a method to mitigate unpredictable interference and channel variations. For downlink, when a wireless device attempts to decode a data message, the wireless device sends to the transmitter an indicator that indicates whether the decoding was successful or not. When the transmitter receives an indicator indicating unsuccessful decoding, the transmitter typically performs a retransmission of the data message, which the receiver typically will combine with the original received transmission. The combining is known as soft combining. Two well-known techniques for soft combining are “Chase combining,” in which every retransmission contains the same information, and “incremental redundancy,” in which every retransmission contains different information from the previous transmission, e.g., the retransmission contains only those portions of the original transmission that were not received correctly. The combining will greatly increase the probability of successful decoding.

#The accompanying drawing figures incorporated in and forming a part of this specification illustrate several aspects of the disclosure, and together with the description serve to explain the principles of the disclosure.

#FIG. 1 illustrates one example of a wireless system (e.g., a cellular communications system) in which embodiments of the present disclosure may be implemented.

#FIG. 2 is a flow chart illustrating an exemplary process for partial retransmission according to an embodiment of the present disclosure.

#The embodiments set forth below represent information to enable those skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure.

#Radio Node:

#As used herein, a “radio node” is either a radio access node or a wireless device.