Delay tolerant node
A Long-Term Evolution (LTE) E-UTRAN Node B (eNodeB) for use in satellite markets. The LTE eNodeB supports extreme channel latencies without the need for any User Equipment (UE) (e.g., mobile handsets) modifications, independent of the UE release or the technology used by the network operator. The system supports high channel latencies in LTE, though can also be used for other wireless technologies such as GSM, 5G New Radio (NR) or any other technologies with similar procedures to those used in LTE.
1. A base station for communication with a terminal station where the terminal station expects to receive an acknowledgement of communication within a fixed time period (X) to maintain a communication link with the base station, and a communication delay (Y) exists between the base station and the terminal station which is greater than the fixed time period (Y>X), said base station comprising:
a processing device configured to schedule with the terminal station an expected time period at which the terminal station is expected to initially send data, provide the expected time period to the terminal station, and send a dummy acknowledgement signal of the data to the terminal station at a first time period that begins prior to the expected time period.
2. The base station of claim 1 , said processing device further configured to determine the first time period based on a delay of communication between the base station and the terminal station.
3. The base station of claim 2 , wherein said processing device determines the first time period based on the acknowledgement signal arriving at the terminal station at a predetermined point of time at which the terminal station expects to receive the acknowledgement signal.
4. The base station of claim 3 , wherein said base station receives the data from the terminal station at a receipt time period after the predetermined point of time.
5. The base station of claim 4 , wherein a time from the expected time period to the receipt time period is larger than expected due to a communication delay.
6. The base station of claim 5 , wherein the base station comprises an eNodeB and the communication delay is greater than 40 ms.
7. The base station of claim 1 , wherein a time from the first time period to the predetermined point of time is larger than expected due to a communication delay.
8. The base station of claim 1 , wherein said base station implements a Hybrid Automatic Repeat reQuest (HARQ) retransmission and error correction protocol.
9. The base station of claim 1 , wherein said base station avoids perceived transmission failure at the terminal station due to excessive channel delay.
10. The base station of claim 1 , wherein said base station comprises an eNodeB and the terminal station is a user equipment.
11. The base station of claim 10 , wherein the user equipment is a mobile device.
12. A base station for communication with a terminal station where the terminal station expects to receive an acknowledgement of communication within a fixed time period (X) to maintain a communication link with the base station, and a communication delay (Y) exists between the base station and the terminal station which is greater than the fixed time period (Y>X), said base station comprising:
a processing device configured to schedule with the terminal station a first time period for the terminal station to transmit a Physical Random Access CHannel (PRACH) message, provide the first time period to the terminal station, send a Random Access Response (RAR) message to the terminal station at a second time period, establish an RAR window at the terminal station for receiving the RAR message during a third time period, and receive the PRACH message during a PRACH window during a fourth time period;
wherein the second time period begins prior to the fourth time period.
13. The base station of claim 12 , said processing device further configured to determine the second time period based on a delay of communication between the base station and the terminal station.
14. The base station of claim 13 , wherein said processing device determines the second time period based on the RAR message arriving at the terminal station within the third time period at the terminal station during the RAR window.
15. The base station of claim 12 , wherein said base station receives the PRACH message from the terminal station at the fourth time period during the PRACH window after the first time period.
16. The base station of claim 12 , wherein a time from the first time period to the fourth time period is larger than expected due to a communication delay.
17. The base station of claim 16 , wherein the base station comprises an eNodeB and the communication delay is greater than 40 ms.
18. The base station of claim 12 , wherein said base station implements a Hybrid Automatic Repeat reQuest (HARQ) retransmission and error correction protocol.
19. The base station of claim 12 , wherein said base station avoids perceived transmission failure at the terminal station due to excessive channel delay.
20. The base station of claim 12 , wherein said base station comprises an eNodeB and the terminal station is a user equipment.
21. The base station of claim 20 , wherein the user equipment is a mobile device.
22. The base station of claim 12 , said processing device further configured to establish a fifth time period for the terminal station to transmit Msg3 transmissions.
23. The base station of claim 22 , wherein the fifth time period is after the fourth time period.
24. The base station of claim 12 , said processing device establishing a plurality of first time periods and the terminal station periodically transmits PRACH messages.
25. The base station of claim 12 , said processing device further configured to generate a control element signal to adjust timing at the terminal station to transmit the PRACH message.
26. The base station of claim 12 , said processing device transmitting a Physical Downlink Control CHannel (PDCCH) order to the terminal station.
27. The base station of claim 26 , said processing device conducting a handover as the terminal device moves to/from a coverage area for said base station from/to another coverage area for another base station.