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Systems and methods for coexistence of license-free uplink traffic and license-based uplink traffic

An authorization-free, service-based technology, applied in transmission path sub-channel allocation, payload allocation, electrical components, etc., can solve problems such as reliability constraints

Active Publication Date: 2021-04-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Because license-free traffic can be bursty and sporadic, efficient use of network resources allocated to license-free traffic can be a challenge
Additionally, some services such as license-exempt services may be subject to delay and / or reliability constraints

Method used

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  • Systems and methods for coexistence of license-free uplink traffic and license-based uplink traffic
  • Systems and methods for coexistence of license-free uplink traffic and license-based uplink traffic
  • Systems and methods for coexistence of license-free uplink traffic and license-based uplink traffic

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0091] Example 1: All UEs retransmit only once

[0092] exist Figure 7A In the example of , M=3 and K=4. Because M is smaller than K, unique packets in consecutive TTUs are impossible. So, for example, UE 1 and UE 2 are both in the group of UEs mapped to areas 500,502. However, in Figure 7A In the example of , license-based services are mapped to areas 504 and 506, and there is no license-exempt UE mapped to these two areas at the same time. Thus, in Figure 7A In the example of , each UE experiences at most one potential collision with grant-based traffic. The probability of some UEs colliding with other license-exempt UEs increases.

[0093] exist Figure 7B In the example of , M=4 and K=4. This is equivalent to the previously described Figure 5 example of . In this case unique packets in consecutive TTUs are possible.

[0094] exist Figure 7C In the example of , M=5 and K=4. In this case, there can again be unique packets in consecutive TTUs. Additionall...

example 2

[0095] Example 2: All UEs retransmit twice

[0096] exist Figure 8 In the example of , each UE performs two retransmissions after the initial transmission. For example, the UE may perform an initial transmission during TTU 600 and retransmissions during TTUs 602,604. However, depending on when the UE has packets to transmit, an initial transmission could alternatively be done during TTU 602 and retransmissions during 604,606. A license-exempt UE will typically try to minimize latency by making initial transmissions during the first available TTU after packets can be transmitted. exist Figure 8In the example of , M=4 and K=4, so unique packets between consecutive retransmissions are possible. Therefore, for the areas 610, 612, 614 to which the license-exempt UE1 is mapped, there are no other UEs sharing more than one of these three areas. exist Figure 8 In the example of , the rule for grant-based allocation is that at most one transmission (between its initial trans...

example 3

[0097] Example 3: General Scenario - - Some UEs transmit once and others transmit twice

[0098] now refer to Figure 9 , shows an example where some UEs retransmit once and some retransmit twice. This can be generalized to the case where there is a set of UEs each transmitting a corresponding number of retransmissions. In this example, after a packet arrives for a given UE, the packet is transmitted in the next available TTU. However, other variants are also possible. For example, in a time division duplex implementation, the UE may need to wait a certain amount of time before an uplink time slot can be used. An example transmission of six TTUs 700, 702, 704, 706, 708, 710 is shown. In this case, there are five segments 712 , 714 , 716 , 718 , 720 . UEs 1, 9, 13 are configured to retransmit once and UEs 7, 8, 6, 20 are configured to retransmit twice. The initial transmission is shown with a circular UE number around it; the first retransmission is shown with a squar...

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Abstract

Systems and methods are provided for scheduling grant-based traffic and mapping resources for grant-free traffic. License-based services are scheduled in the first frequency partition, and license-free services are mapped in the second frequency partition. In a first option, grant-based traffic is scheduled also in part of the first partition, but in a limited manner that ensures that a given device's transmissions and retransmissions do not all experience interference from grant-based traffic. In another option, some license-exempt traffic is mapped to a part of the second partition and the frequency of said some license-exempt traffic is distributed over the second partition.

Description

[0001] cross reference [0002] This application claims priority to U.S. Patent Application No. 15 / 142,638, filed April 29, 2016, entitled "System and Method for Coexistence of Grant-Free and Grant-Based Uplink Traffic," the entire contents of which Incorporated herein by reference. technical field [0003] The present application relates to systems and methods for coexistence of license-exempt uplink traffic and license-based uplink traffic. Background technique [0004] In many wireless networks such as long-term evolution (long-term evolution, LTE) networks, the selection of the shared data channel for the uplink is based on scheduling / granting, and the scheduling and granting mechanism is determined by the base station (base station) in the network. station, BS) control. A user equipment (user equipment, UE) sends an uplink scheduling request to the BS. When the BS receives the scheduling request, the BS sends an uplink grant indicating its dedicated uplink resource a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/12
CPCH04W72/1268H04L5/0044H04W74/08H04W74/04H04W72/04H04W72/1215
Inventor 陶菲克尔·伊斯兰凯文·卡尔·金·欧马江镭
Owner HUAWEI TECH CO LTD