Terminal device, base station device and wireless communication system

A technology for a terminal device and a base station, which is applied in the directions of wireless communication, pilot signal allocation, transmission path sub-channel allocation, etc., and can solve the problems of unclear initialization conditions and inability to identify and so on.

Pending Publication Date: 2021-08-06
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, there is a problem that the initialization conditions for restoring the SR counter to the initial value are not clear, and it may not be clear whether to continue counting scheduling requests or to initialize the SR counter

Method used

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  • Terminal device, base station device and wireless communication system
  • Terminal device, base station device and wireless communication system
  • Terminal device, base station device and wireless communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0072] The radio communication system according to Embodiment 1 includes a terminal device 100 and a base station device 200 . The terminal device 100 transmits UL (Uplink) data from the terminal device 100 to the base station device 200 . At this time, the terminal device 100 uses the occurrence of UL data to be transmitted as a trigger to transmit a buffer status report (BSR), and starts (triggers) transmission of a scheduling request (SR) when a trigger for transmission of a BSR occurs. Then, when the terminal apparatus 100 receives a UL grant (grant) from the base station apparatus 200 as a response to the SR, it transmits a BSR using resources allocated by the UL grant. Thereafter, the terminal device 100 further receives a UL grant from the base station device 200 , and transmits UL data using resources allocated by the UL grant.

[0073] The SR counter counts the number of SR transmissions after SR transmission is started, and when the number of SR transmissions reache...

Embodiment approach 2

[0111] The wireless communication system according to Embodiment 2 includes a terminal device 100 and a base station device 200 as in Embodiment 1. The configurations of the terminal device 100 and the base station device 200 according to Embodiment 2 are the same as those of Embodiment 1, and therefore description thereof will be omitted.

[0112] In addition, it is specified that when one SR is activated and other SRs are not activated in the same SR configuration, an SR counter for counting the number of transmission times of the SR is initialized. However, for example, in a case where the same UL data is transmitted multiple times simultaneously on a plurality of logical channels, it is considered that a plurality of SRs are simultaneously activated. In such a case, the initialization of the SR counter is not clearly defined in the current situation, and a protocol error may occur. Therefore, in Embodiment 2, the prevention of a protocol error when a plurality of SRs are ...

Embodiment approach 3

[0122] The radio communication system according to Embodiment 3 includes a terminal device 100 and a base station device 200 similarly to Embodiments 1 and 2. The configurations of the terminal apparatus 100 and the base station apparatus 200 of Embodiment 3 are the same as those of Embodiments 1 and 2, and therefore description thereof will be omitted.

[0123] Also, consider a case where the SR configuration is changed while the SR transmission is continued. Specifically, for example, when the terminal device 100 performs a multiple access connection with a plurality of base station devices 200 at the same time, the group (CG: CellGroup) of the connected cell may be reset to a MAC (Medium Access Control (Medium Access Control) )) layer is not initialized (reset). In this case, the SR setting may also be reset by resetting the CG. In such a case, the operation of the SR counter set for each SR is not clearly defined at present, and a protocol error may occur.

[0124] For ...

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Abstract

A terminal device (100) which transmits a scheduling request to a base station device is provided with a reception unit (111) which can receive a signal including setting information relating to a scheduling request setting corresponding to a logical channel, and a control unit (114) which controls a counter corresponding to the scheduling request setting. The control unit (114), if the reception unit (111) has received a signal including setting information relating to resetting of the scheduling request setting, controls the counter in accordance with at least one of the scheduling request setting after the resetting and the state of the scheduling request.

Description

technical field [0001] The present invention relates to a terminal device, a base station device, and a wireless communication system. Background technique [0002] In the current network, services of mobile terminals (smart phones, feature phones) occupy most of the network resources. In addition, the business using mobile terminals tends to expand in the future. [0003] On the other hand, it is required to respond to services having various requirements in response to the development of IoT (Internet of things: Internet of Things) services (for example, monitoring systems such as traffic systems, smart meters, and devices). Therefore, in the communication standard of the fifth generation mobile communication (5G or NR (New Radio)), in addition to the standard technology of the fourth generation mobile communication (4G) (for example, non-patent documents 1 to 12), it is also required to realize further High data rate, large capacity, low delay technology. In addition, ...

Claims

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Application Information

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IPC IPC(8): H04W72/12H04W28/02
CPCH04W28/02H04W72/21Y02D30/70H04L5/0048H04W72/543H04W72/566
Inventor太田好明河崎义博青木信久
OwnerFUJITSU LTD