BASE STATION APPARATUS AND WIRELESS TERMINAL APPARATUS

• US 20140029527A1
• Filed: 07/02/2013
• Published: 01/30/2014
• Est. Priority Date: 07/27/2012
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: OKUDA, Masato
• Granted Patent: US 9,265,055 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 2001/0096 Channel splitting in point-to-point links
• CPC Class Codes: H04L 45/245 Link aggregation, e.g. trunking
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections

Abstract

A base station apparatus including: a processor configured to extract an specified packet flow among packet flows which are to be transmitted by using a link aggregation of a first radio link and a second radio link, to generate encapsulated packets by adding a link aggregation information to reception packets which are included in the specified packet flow, the link aggregation information indicating that the specified packet flow are to be transmitted by using the link aggregation, and to control the first wireless interface and the second wireless interface such that the encapsulated packets are transmitted by the link aggregation, based on a distribution of the encapsulated packets between the first radio link and the second radio link being determined based on radio qualities, and such that the reception packets which are not included in the specified packet flow are transmitted via the first radio link.

Claims

1. A base station apparatus comprising:

a first wireless interface configured to communicate with a wireless terminal apparatus via a first radio link;

a second wireless interface configured to communicate with the wireless terminal apparatus via a second radio link;

a network interface configured to receive packet flows from a core network, each of the packet flows including reception packets; and

a processor configured

to extract an specified packet flow among the packet flows which are to be transmitted by using a link aggregation of the first radio link and the second radio link,

to generate encapsulated packets by adding a link aggregation information to the reception packets which are included in the specified packet flow, the link aggregation information indicating that the specified packet flow are to be transmitted by using the link aggregation,

to acquire a first radio quality of the first radio link and a second radio quality of the second radio link, and

to control the first wireless interface and the second wireless interface such that the encapsulated packets are transmitted by the link aggregation of the first radio link and the second radio link, based on a distribution of the encapsulated packets between the first radio link and the second radio link being determined based on the first radio quality and the second radio quality, and such that the reception packets which are not included in the specified packet flow are transmitted via the first radio link.

2. The base station apparatus according to the claim 1, wherein a link aggregation information is a common destination address between the first radio link and the second radio link, which is included in an additional packet header.

3. The base station apparatus according to the claim 3, wherein

the processor is further configured

to control the first wireless interface and the second wireless interface such that uplink packets are received by the link aggregation of the first radio link and the second radio link,

to control the network interface to transmit the uplink packets from which the link aggregation information is removed, based on destination addresses included in packet headers of the uplink packets.

4. The base station apparatus according to the claim 3, wherein

sequence numbers indicating orders of the uplink packets are attached to the uplink packets.

5. The base station apparatus according to the claim 4, wherein

the processor is configured to the network interface to transmit the uplink packets, as to put the sequence numbers attached to the uplink packets in order.

6. A base station apparatus comprising:

a first wireless interface configured to communicate with a wireless terminal apparatus via a first radio link;

a second wireless interface configured to communicate with the wireless terminal apparatus via a second radio link;

a first network interface configured to receive packet flows from a first core network;

a second network interface configured to receive the packet flows from a second core network; and

a processor configured

to extract an specified packet flow among the packet flows, the specified packet flow including first reception packets and second reception packets, the first reception packets being received by the first network interface and including capsulated packet headers whose destination addresses are first address, the second reception packets being received by the second network interface and including capsulated packet headers whose destination addresses are second address which is different from the first address,

to generate encapsulated packets by replacing the first address of the first reception packets with the second address or the second address of the second reception packets with the first address,

to acquire a first radio quality of the first radio link and a second radio quality of the second radio link, and

to control the first wireless interface and the second wireless interface such that the encapsulated packets are transmitted by a link aggregation of the first radio link and the second radio link, based on a distribution of the encapsulated packets between the first radio link and the second radio link being determined based on the first radio quality and the second radio quality, such that reception packets which are not included in the specified packet flow and are received from the first network interface are transmitted via the first radio link, and such that reception packets which are not included in the specified packet flow and are received from the second network interface are transmitted via the second radio link.

7. The base station apparatus according to the claim 6, wherein

the processor is further configured

to control the first wireless interface and the second wireless interface such that uplink packets are received by the link aggregation of the first radio link and the second radio link,

to control the network interface to transmit the uplink packets from which a link aggregation information is removed, based on destination addresses included in packet headers of the uplink packets.

8. The base station apparatus according to the claim 6, wherein

the processor is further configured to delay the first reception packets or the second reception packets whose delay time is smaller.

9. A wireless terminal apparatus comprising:

a first wireless interface configured to communicate with a base station apparatus via a first radio link;

a second wireless interface configured to communicate with the base station apparatus via a second radio link; and

a processor configured

to extract, when transmitting each of packet flows, an specified packet flow among packet flows which are to be transmitted by using a link aggregation of the first radio link and the second radio link, each of the packet flows including transmission packets,

to generate encapsulated packets by adding a link aggregation information to the transmission packets which are included in the specified packet flow, the link aggregation information indicating that the specified packet flow are to be transmitted by using the link aggregation,

to acquire a first radio quality of the first radio link and a second radio quality of the second radio link, and

to control the first wireless interface and the second wireless interface such that the encapsulated packets are transmitted by the link aggregation of the first radio link and the second radio link, based on a distribution of the encapsulated packets between the first radio link and the second radio link being determined based on the first radio quality and the second radio quality, and such that the transmission packets which are not included in the specified packet flow are transmitted via one of the first radio link and the second radio link.

10. The wireless terminal apparatus according to the claim 9, wherein a link aggregation information is a common destination address between the first radio link and the second radio link, which is included in an additional packet header.