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System and method for scheduling uplink transmissions on unlicensed radio resources

A technology for radio resource and link transmission, applied in the field of uplink data transmission, which can solve the problems of complex scheduling, difficulty in optimizing resource efficiency, delay, overhead and throughput, etc.

Active Publication Date: 2021-12-31
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These aspects complicate scheduling in that it is difficult to optimize resource efficiency, latency, overhead, and throughput.

Method used

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  • System and method for scheduling uplink transmissions on unlicensed radio resources
  • System and method for scheduling uplink transmissions on unlicensed radio resources
  • System and method for scheduling uplink transmissions on unlicensed radio resources

Examples

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Embodiment Construction

[0038] figure 1A wireless communication system 10 is shown. In some embodiments, wireless communication system 10 operates at least partially on unlicensed radio resources (eg, on unlicensed spectrum 12). System 10 may be, for example, a Long Term Evolution Unlicensed (LTE-U) system (e.g., based on 3GPP PR Rel. 10 / 11 / 12 and defined by the LTE-U Forum) utilizing anchors in licensed spectrum but also employing unlicensed spectrum Or a License Assisted Access (LAA) system (eg, defined by 3GPP Release 13). Alternatively, system 10 may be a MulteFire (ie, Standalone LTE) system that does not require anchors in licensed spectrum.

[0039] Where operating at least in part on unlicensed radio resources such as the unlicensed spectrum 12, the transmissions are contention or contention-based, for example among many different types of systems. For example, in some embodiments, a Clear Channel Assessment (CCA) or Listen Before Talk (LBT) period must be performed before performing a tra...

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Abstract

A scheduling node (14) in a wireless communication system is configured to schedule uplink transmissions on unlicensed radio resources. The scheduling node (14) is configured to detect whether the scheduling node (14) has transmitted in a subframe on unlicensed radio resources or has been scheduled to receive in a subframe on unlicensed radio resources. The scheduling node (14) is further configured to, upon detection of transmitting, have a grant based on whether the scheduling node (14) has transmitted in a subframe on an unlicensed radio resource or has been scheduled to receive in a subframe on an unlicensed radio resource Delayed Joint Grant. The grant delay is the delay between the transmission of the joint grant and the earliest subframe of the plurality of subframes granted by the joint grant for uplink transmission on ungranted radio resources.

Description

technical field [0001] The present invention relates generally to systems and methods for wireless communications, and in particular embodiments, to systems and methods for uplink data transmission over unlicensed spectrum. Background technique [0002] A licensed radio resource is a resource (eg, in terms of frequency) granted to a licensee by a governmental agency, such as the FCC, for example. With exclusive rights, licensees can transmit on licensed radio resources without interference or resource congestion. This may allow licensees to maximize resource efficiency and signal quality. However, the number of licensed radio resources is limited, which in turn limits their ability to meet the increasing demand for greater throughput from applications and services. Furthermore, obtaining licensed radio resources is difficult and expensive. [0003] In contrast, unlicensed radio resources are resources for which no exclusive rights are granted to any licensee (eg, in frequ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/12
CPCH04W72/23H04W72/20H04W16/14H04W72/0446H04W72/0453H04W74/0808
Inventor R.卡拉基郑荣富
Owner TELEFON AB LM ERICSSON (PUBL)