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Wireless communication system, wireless base station, wireless terminal, and wireless communication method

A technology of a wireless communication system and a wireless base station, which is applied in the field of wireless communication systems and can solve problems such as poor communication quality and high communication quality

Active Publication Date: 2019-10-15
FUJITSU CONNECTED TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for wireless terminals, there may be other wireless base stations whose UL communication quality is higher than that of the connected wireless base station
Even if it is assumed that fixed communication quality (reception quality, transmission delay, etc.) is ensured for DL, the communication quality may not necessarily be good for UL when the wireless terminal is located at the edge of a cell, etc.
In addition, when there is another wireless base station whose DL communication quality is higher than that of the connected wireless base station, the connected wireless base station of the wireless terminal is switched by handover, so it is out of the scope of this problem.

Method used

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  • Wireless communication system, wireless base station, wireless terminal, and wireless communication method
  • Wireless communication system, wireless base station, wireless terminal, and wireless communication method
  • Wireless communication system, wireless base station, wireless terminal, and wireless communication method

Examples

Experimental program
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no. 2 Embodiment approach

[0145] In the second embodiment, an example other than the first embodiment will be described in the case where the wireless terminal 2 a communicates with different wireless base stations 1 in DL and UL. In the second embodiment, a case where transmission data (DL data) for a subordinate wireless terminal 2 a occurs in the wireless base station 1 a will be described.

[0146] The second embodiment has many points in common with the first embodiment. The following description will focus on the differences between the second embodiment and the first embodiment.

[0147] according to Figure 9 The processing sequence of the second embodiment will be described. As mentioned earlier, Figure 9 This corresponds to the processing when transmission data (DL data) for the subordinate wireless terminal 2a is generated in the wireless base station 1a.

[0148] exist Figure 9 In S201, first, DL data is generated in the connected wireless base station 1a. For example, DL data is ge...

no. 3 Embodiment approach

[0176] The third embodiment is a modification applicable to the first embodiment or the second embodiment. The connected wireless base station 1a selects another wireless base station 1b as a UL transmission destination based on the UL reception quality notified in advance from the other wireless base station 1b.

[0177] Hereinafter, a modified example in which the third embodiment is applied to the first embodiment will be described. This modified example has many points in common with the first embodiment, so the following description will focus on points different from the first embodiment. In addition, as described above, although the third embodiment can also be applied to the second embodiment to modify it, since the same application as the application to the first embodiment is sufficient, a detailed description is omitted.

[0178] according to Figure 11 A processing sequence in which the third embodiment is applied to a modified example of the first embodiment will...

no. 5 Embodiment approach

[0194] The fifth embodiment is a modified example that can be applied to any one of the first to third embodiments. The connected wireless base station 1a does not need to obtain other station wireless resource information from the other wireless base stations 1b and 1c, and notifies the UL radio resource used for UL transmission from the radio terminal 2a. In other words, the connected wireless base station 1a unilaterally notifies the other wireless base stations 1b and 1c of the UL wireless resource used for UL transmission from the wireless terminal 2a.

[0195] Hereinafter, a modified example in which the fifth embodiment is applied to the first embodiment will be described. This modified example has many points in common with the first embodiment, so the following description will focus on points different from the first embodiment. In addition, as described above, the fifth embodiment can be modified by applying the fifth embodiment to any one of the second to third em...

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PUM

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Abstract

An object of the disclosed technology is to enable a wireless base station other than a connected wireless base station to receive data from the wireless terminal when the wireless terminal communicates with different wireless base stations in UL and DL. The disclosed wireless communication system includes a wireless base station and a wireless terminal performing wireless communication with the wireless base station. resource-related first information; and a downlink wireless transmission unit that transmits, to the wireless terminal, second information indicating a second uplink resource selected from the first uplink resources based on the first information, so that The radio terminal transmits to the other radio base station.

Description

technical field [0001] The present invention relates to a wireless communication system, a wireless terminal, a wireless base station and a wireless communication method. Background technique [0002] In recent years, in wireless communication systems such as mobile phone systems (cellular systems), in order to further increase the speed and capacity of wireless communication, etc., next-generation wireless communication technologies are being considered. For example, 3GPP (3rd Generation Partnership Project: Third Generation Partnership Project), which is a standardization body, has proposed a communication standard called LTE (Long Term Evolution: Long Term Evolution), and a wireless communication technology based on LTE is called LTE-A (LTE-Advanced: Long Term Evolution-Advanced) communication standard. [0003] The latest communication standard completed by 3GPP is Release (Release) 10 corresponding to LTE-A, and its functions have been greatly expanded with respect to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W16/32H04W28/16H04W72/12
CPCH04L5/0035H04L5/0094H04L5/0073H04L5/0055H04W72/1268H04L1/1861H04W72/00H04W72/04H04W88/08H04W72/23H04W72/20H04W72/21
Inventor 椎崎耕太郎伊藤章
Owner FUJITSU CONNECTED TECH LTD