# US 10,454,829 B2 · Enhanced local access in mobile communications using small node devices

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- Number: US 10,454,829 B2
- Document ID: US10454829B2
- Status: Granted
- Kind: B2
- Application number: 15/470,262
- Filed: 2017-03-27
- Published: 2017-09-21
- Granted: 2019-10-22
- Earliest claimed: 2011-06-01
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Hiroyuki Ishii; Sean A. Ramprashad; Sayandev Mukherjee
- Web page: https://patentgrep.com/patent/US10454829B2

## CPC

- H04W 52/242: {taking into account path loss}
- H04W 28/0864: {of different hierarchy levels, e.g. Master Evolved Node B [MeNB] or Secondary Evolved node B [SeNB]}
- H04W 36/00695: {using split of the control plane or user plane}
- H04W 52/383: {power control in peer-to-peer links}
- H04W 76/14: Direct-mode setup
- H04W 76/15: Setup of multiple wireless link connections
- H04W 36/00692: {using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO] (allocation of physical resources in CoMP or in CA H04L5/0035)}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A network device in a wireless communication system includes a first communication circuit that receives a first control-plane message from a base station (BS) over a first communication link; a second communication circuit that transmits user-plane data to a user equipment (UE) over a second communication link established responsive to the first control-plane message; and a third communication circuit that receives the user-plane traffic data from a server over a third communication link. The UE communicates user-plane data with the BS and the network device simultaneously at a predetermined time. The first communication circuit receives a second control-plane message from the BS. The second communication circuit transmits a pilot signal to the UE responsive to the second control-plane message to enable the UE to measure a radio link quality of the second communication link using the pilot signal. The second communication link is maintained, at least in part, based on the radio link quality of the second communication link.

## Claims

### Claim 1

A network device in a cellular telecommunications system, comprising:
a first communication circuit that receives a first control-plane message from a base station (BS) over a first communication link;
a second communication circuit that transmits user-plane data to a user equipment (UE) over a second communication link established at a request of the first control-plane message; and
a third communication circuit that receives the user-plane traffic data from a server over a third communication link,
wherein the second communication link and a communication link for transmitting user-plane data from the base station to the user equipment can use different carrier frequencies simultaneously.

### Claim 2 (depends on 1)

The network device of claim 1, wherein the user-plane data transmitted from the second communication circuit is received at the UE at the same time as the user-plane data transmitted from the BS.

### Claim 3

A user equipment (UE) in a cellular telecommunication system, comprising:
a first communication circuit that receives control-plane data and first user-plane data from a base station (BS) over a first communication link; and
a second communication circuit that receives second user-plane data from a network device using a second communication link,
wherein the first communication circuit receives a first control-plane message from the BS over the first communication link,
wherein the second communication circuit establishes the second communication link at a request of the first control-plane message, and
wherein the first communication link and the second communication link can use different carrier frequencies simultaneously.

### Claim 4 (depends on 3)

The user equipment of claim 3, wherein the user equipment receives the first user-plane data and the second user-plane data simultaneously.

### Claim 5

A base station (BS) for controlling a user equipment (UE) and a network device in a cellular telecommunications network, comprising:
a first communication circuit that exchanges user-plane and control-plane data with the UE using a first communication link, and exchanges control-plane data with the network device using a second communication link; and
a processor that controls an establishment and also a release/reconfiguration/handover of a third communication link, which is established between the UE and the network device, at a request of a first control-plane message transmitted to at least one of the UE and the network device using a respective one of the first and second communication links,
wherein the control unit is further configured to identify user-plane data to be exchanged between the UE and the network device using the third communication link, and
wherein the first communication link and the third communication link can use different carrier frequencies simultaneously.

### Claim 6 (depends on 5)

The base station of claim 5, wherein the user plane data transmitted from the first communication circuit using a first communication link is received at the UE at the same time as the user plane data transmitted from the network device.

### Claim 7

A method of communicating using a network device in a cellular telecommunication system, comprising:
at the network device, receiving a first control-plane message from a base station (BS) over a first communication link;
at the network device, establishing a second communication link at a request of the first control-plane message with a user equipment;
at the network device, receiving downlink user-plane data from a server over a third communication link; and
from the network device, transmitting the downlink user-plane data over the second communication link to the user equipment, and
wherein the second communication link and a communication link for transmitting user-plane data from the base station to the user equipment can use different carrier frequencies simultaneously.

### Claim 8

A method of communicating using a user equipment (UE) in a cellular telecommunication system, comprising:
at the UE, receiving a first control-plane message and first user-plane data from a base station (BS) over a first communication link;
at the UE, establishing a second communication link with a network device at a request of the first control-plane message;
at the UE, receiving second user-plane data from the network device over the second communication link; and
wherein the first communication link and the second communication link can use different carrier frequencies simultaneously.

### Claim 9

A method of communicating using a base station (BS) for controlling a user equipment (UE) and a network device in a cellular telecommunication, comprising:
at the BS, exchanging user-plane data and control-plane message with the UE using a first communication link and exchanging control-plane message with the network device using a second communication link;
at the BS, controlling an establishment and also a release/reconfiguration/handover of a third communication link, which is established between the UE and the network device, at a request of a first control-plane message transmitted to at least one of the UE and the network device using the respective one of the first and second communication links; and
at the BS, identifying user-plane data to be exchanged between the UE and the network device using the third communication link,
wherein the network device receives the user-plane data from a server, and
wherein the first communication link and the third communication link can use different carrier frequencies simultaneously.