# US 10,455,475 B1 · Inter-layer communications in wireless networks including a high latency connection

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- Number: US 10,455,475 B1
- Document ID: US10455475B1
- Status: Granted
- Kind: B1
- Application number: 16/228,662
- Filed: 2018-12-20
- Granted: 2019-10-22
- Earliest claimed: 2018-05-29
- Assignees: Hughes Network Systems, LLC
- Applicants: Sandeep Ahluwalia; Channasandra Ravishankar; Charles Barnett
- Inventors: Sandeep Ahluwalia; Channasandra Ravishankar; Charles Barnett
- Web page: https://patentgrep.com/patent/US10455475B1

## CPC

- H04W 36/0016: {Hand-off preparation specially adapted for end-to-end data sessions}
- H04W 92/12: between access points and access point controllers
- H04B 7/185: Space-based or airborne stations; {Stations for satellite systems}(H04B7/204 takes precedence)
- H04B 7/18558: {Arrangements for managing communications, i.e. for setting up, maintaining or releasing a call between stations}
- H04B 7/195: Non-synchronous stations
- H04W 36/083: {wherein at least one of the access points is a moving node}
- H04W 84/06: Airborne or Satellite Networks (space-based or airborne stations H04B7/185)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

A system and method for interfacing a User Equipment (UE) to a Core Network (CN) is disclosed. The method including: providing a high latency connection; providing a satellite network portal (SNP) to connect to the UE via a satellite link, wherein the SNP includes a Media Access Control (MAC) layer for managing the satellite link and a Radio Layer Control (RLC) layer of the UE; interfacing the UE to the CN with a Point of Presence (POP) including a Radio Resource Control (RRC) layer of the UE and a Packet Data Convergence Protocol (PDCP) layer of the UE; and establishing a session between the CN and the UE via the RRC layer, the PDCP layer and the RLC layer. In the method, network traffic, between the SNP and the POP, over the high latency connection has a latency greater than 10 milliseconds (ms), the session does not timeout due to the latency of the high latency connection, and the MAC layer schedules bandwidth for the establishing over the satellite link.

## Claims

### Claim 1

A method for interfacing a User Equipment (UE) to a Core Network (CN), the method comprising:
providing a high latency connection;
providing a satellite network portal (SNP) to connect to the UE via a satellite link, wherein the SNP comprises a Media Access Control (MAC) layer for managing the satellite link and a Radio Layer Control (RLC) layer of the UE;
interfacing the UE to the CN with a Point of Presence (POP) comprising a Radio Resource Control (RRC) layer of the UE and a Packet Data Convergence Protocol (PDCP) layer of the UE; and
establishing a session between the CN and the UE via the RRC layer, the PDCP layer and the RLC layer,
wherein
network traffic, between the SNP and the POP, over the high latency connection has a latency greater than 10 milliseconds (ms),
the session does not timeout due to the latency of the high latency connection, and
the MAC layer schedules bandwidth for the establishing over the satellite link.

### Claim 2 (depends on 1)

The method of claim 1, further comprising communicating the network traffic for the session; and handing over the satellite link from a first beam of the MAC layer to a second beam of the MAC layer.

### Claim 3 (depends on 2)

The method of claim 2, wherein the handing over is due to a relative movement between the UE and a satellite.

### Claim 4 (depends on 2)

The method of claim 2, wherein the handing over does not result in updates to the PDCP layer servicing the UE.

### Claim 5 (depends on 2)

The method of claim 2, wherein a satellite providing the satellite link belongs to a satellite constellation that is not geosynchronous.

### Claim 6 (depends on 2)

The method of claim 2, wherein the SNP comprises a first SNP and a second SNP,
the first SNP comprises the first beam,
the second SNP comprises the second beam, and
the session is moved from the RLC layer of the first SNP to the RLC layer of the second SNP.

### Claim 7 (depends on 2)

The method of claim 2, wherein a satellite providing the satellite comprises a first satellite and a second satellite,
the first satellite comprises the first beam, and
the second satellite comprises the second beam.

### Claim 8 (depends on 2)

The method of claim 2, wherein the establishing comprises using one or more of a parallel protocol layer configuration, a proxy-based protocol layer configuration or an access proxy-based protocol layer configuration for communications between the RRC layer and the RLC layer.

### Claim 9 (depends on 1)

The method of claim 1, wherein the POP and the SNP, jointly, are configured to operate as an enhanced Node B (eNB) when connected to the CN.

### Claim 10 (depends on 1)

The method of claim 1, wherein the establishing comprises using a parallel protocol layer configuration for communications between the RRC layer and the RLC layer.

### Claim 11 (depends on 1)

The method of claim 1, wherein the establishing comprises using a proxy-based protocol layer for communications between the RRC layer and the RLC layer.

### Claim 12 (depends on 1)

The method of claim 1, wherein the establishing comprises using an access proxy-based protocol layer for communications between the RRC layer and the RLC layer.

### Claim 13

A system to interface a User Equipment (UE) to a Core Network (CN), the system comprising:
a high latency connection;
a satellite network portal (SNP) to connect to the UE via a satellite link, wherein the SNP comprises a Media Access Control (MAC) layer for managing the satellite link and a Radio Layer Control (RLC) layer of the UE;
a Point of Presence (POP), to interface the UE to the CN, comprising a Radio Resource Control (RRC) layer of the UE and a Packet Data Convergence Protocol (PDCP) layer of the UE; and
a session established between the CN and the UE via the RRC layer, the PDCP layer and the RLC layer,
wherein
network traffic, between the SNP and the POP, over the high latency connection has a latency greater than 10 milliseconds (ms),
the session does not timeout due to the latency of the high latency connection, and
the MAC layer schedules bandwidth for the session over the satellite link.

### Claim 14 (depends on 13)

The system of claim 13, wherein the POP and the SNP communicate the network traffic for the session, and the SNP hands over the satellite link from a first beam of the MAC layer to a second beam of the MAC layer.

### Claim 15 (depends on 14)

The system of claim 14, wherein the SNP hands over due to a relative movement between the UE and a satellite.

### Claim 16 (depends on 14)

The system of claim 14, wherein the SNP hand over does not result in updates to the PDCP layer servicing the UE.

### Claim 17 (depends on 14)

The system of claim 14, wherein a satellite providing the satellite link belongs to a satellite constellation that is not geosynchronous.

### Claim 18 (depends on 14)

The system of claim 14, wherein the SNP comprises a first SNP and a second SNP,
the first SNP comprises the first beam,
the second SNP comprises the second beam, and
the session is moved from the RLC layer of the first SNP to the RLC layer of the second SNP.

### Claim 19 (depends on 14)

The system of claim 14, wherein a satellite providing the satellite link comprises a first satellite and a second satellite,
the first satellite comprises the first beam, and
the second satellite comprises the second beam.

### Claim 20 (depends on 14)

The system of claim 14, wherein the session is established using one or more of a parallel protocol layer configuration, a proxy-based protocol layer configuration or an access proxy-based protocol layer configuration for communications between the RRC layer and the RLC layer.

### Claim 21 (depends on 11)

The system of claim 11, wherein the POP and the SNP, jointly, are configured to operate as an enhanced Node B (eNB) when connected to the CN.