Method and apparatus at the physical and link layer for mobile communications

• US 9,942,818 B2
• Filed: 01/06/2017
• Issued: 04/10/2018
• Est. Priority Date: 09/12/2011
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Ishii, Hiroyuki
• Primary Examiner(s): Eisner, Ronald
• Application Number:
  US15/400,594
• Publication Number:
  US 20170127328A1
• Time in Patent Office: 459 Days
• Field of Search: 455 7- 25
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/0215 based on user or device properties, e.g. MTC-capable devices services for machine-to-machine communication [M2M] or machine type communication [MTC] H04W4/70; wireless resource selection or allocation plan definition based on terminal or device properties H04W72/51
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 36/38 by fixed network equipment
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 76/30 Connection release
• CPC Class Codes: H04W 8/082 for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

In a cellular telecommunications network, a mobile communication system to offload data traffic from base stations to small-node devices, includes a radio base station, a plurality of small-node devices, a macro-base-station-to-the-small-node-device (BS2D) communication section configured to receive a first control-plane message from the radio base station over a BS2D communication link, a small-node-device-to-user-equipment (D2UE) communication section configured to transmit user-plane data to a user equipment over a wireless D2UE communication link established responsive to the first control-plane message, and a center small-node device. The center small-node device includes a buffer section, a backhaul communication section configured to receive the user-plane traffic data from a server over a backhaul link, and is configured to manage D2UE connections between the plurality of small-node devices and the mobile station, buffer data to be transmitted in downlink and uplink for the plurality of small-node devices, and conduct a link adaptation for the D2UE connections.

Claims

1. In a cellular telecommunications network, a radio base station to control a user equipment (UE) and a plurality of small-node devices, the radio base station comprising:

a macro-base-station-to-the-UE (BS2UE) communication transmitter/receiver exchanges user-plane and first control-plane data with the UE using a wireless BS2UE communication link;

a macro-base-station-to-the-small-node-device (BS2D) communication transmitter/receiver exchanges second control-plane data with at least one of the plurality of small-node devices using a BS2D communication link; and

a small-node-device-to-the-UE (D2UE) control processor controls an establishment and also a release/reconfiguration/handover of a D2UE communication link through a first control-plane data and/or a second control-plane data transmitted to at least one of the UE and the plurality of small-node devices using one of the BS2UE and BS2D communication links,

wherein data in the D2UE communication link is scrambled by a sequence specific to a mobile station.

2. The radio base station of claim 1, wherein identification numbers of the plurality of small-node devices are included in the first control-plane data and in the second control-plane data.

3. The radio base station of claim 1, wherein an identification number of the sequence is included in the first control-plane data and in the second control-plane data.