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Systems and methods of communicating between a MAC LAYER AND a PHY layer for transmissions

A technology for communication devices and communication channels, applied in transmission systems, digital transmission systems, separation devices for transmission paths, etc., capable of solving problems such as LTE uplink performance obstacles

Active Publication Date: 2020-07-14
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LTE uplink (UL) performance is especially hampered due to the centralized coordination and dependency of terminal devices on base stations (e.g., eNBs) for channel access in LTE operation and the imposed LBT regulations

Method used

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  • Systems and methods of communicating between a MAC LAYER AND a PHY layer for transmissions
  • Systems and methods of communicating between a MAC LAYER AND a PHY layer for transmissions
  • Systems and methods of communicating between a MAC LAYER AND a PHY layer for transmissions

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Embodiment Construction

[0048] The technical solutions presented herein control how different layers of a wireless device (eg, a wireless communication device or a network node) handle transmissions and potential retransmissions. Before diving into the details of the technical solutions, the associated systems are generally first described below.

[0049] In LTE, uplink access is typically controlled, ie scheduled by a network node, such as an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) NodeB (eNB). In this case, the user equipment (UE) will report to the eNB when data is available for transmission, eg by sending a Scheduling Request (SR) message. Based on the SR message, the eNB grants resources and related information to the UE in order to implement the transmission of data of a certain size. The assigned resources are not necessarily enough for the UE to transmit all available data. Therefore, the UE may send a Buffer Status Report (BSR) control message in the granted resources ...

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Abstract

A wireless device (300, 400), e.g., a wireless communication device (e.g., a UE) or a network node (e.g., an eNB) having a Medium Access Control (MAC) layer (410) and a physical (PHY) layer (430) configured to send / resend transmissions is presented herein. The MAC layer (410) sends transmissions to the PHY layer (430) for transmitting, by the PHY layer (430), to a remote wireless device (300, 400). The PHY layer (430) receives the transmission from the MAC layer (410), and attempts to send the transmission. The PHY layer (430) further indicates to the MAC layer (410) whether the attempt to send the transmission, by the PHY layer (430), was successful. Responsive to the indication, the MAC layer (410) determines whether the attempt, by the PHY layer (430), to send the transmission was successful. The MAC layer (410) then selectively indicates to the PHY layer (430) whether to attempt to resend the transmission responsive to the determination. In so doing, the solution presented herein addresses problems caused by conflicting requirements for unlicensed and licensed spectrums, thus increasing throughput and saving power.

Description

[0001] This application claims priority to U.S. Application No. 62 / 591165, filed November 27, 2017, the disclosure of which is incorporated herein by reference in its entirety. technical field [0002] The technical solutions presented herein relate generally to wireless communications, and more specifically to interactions between communication layers of devices for transmission and / or retransmission attempts. Background technique [0003] 3GPP work on "Licensed Assisted Access" (LAA) is intended to allow Long Term Evolution (LTE) devices to also operate in the unlicensed radio spectrum. Candidate frequency bands for LTE operation in unlicensed spectrum include 5GHz, 3.5GHz, etc. Unlicensed spectrum is used as a supplement to licensed spectrum or to allow entirely independent operation. [0004] The LAA framework (3GPP Release 13) builds on the carrier aggregation scheme introduced in Release 10 LTE to access additional bandwidth in unlicensed bands. figure 1 An exemplary...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04W72/00
CPCH04L5/001H04L5/0078H04L5/0091H04L27/0006H04W16/14Y02D30/70H04W80/02H04L1/1819H04L5/0082
Inventor M.贝勒斯基M.贝里斯特伦R.卡拉基
Owner TELEFON AB LM ERICSSON (PUBL)
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