Multiple input multiple output (MIMO) layer control for wireless user equipment
A wireless access node control Multiple Input Multiple Output (MIMO) layers for a User Equipment (UE). A radio wirelessly exchanges network signaling with the User Equipment (UE) and exchanges the network signaling with baseband circuitry. The baseband circuitry exchanges the network signaling with the radio. The baseband circuitry determines a UE capability and identifies radio band status for the UE. The baseband circuitry selects a number of the MIMO layers for the UE based on the UE capability and the radio band status. The baseband circuitry precodes user data into precoded data for the selected number of MIMO layers and transfers the precoded data to the radio. The radio receives the precoded data from the baseband circuitry and wirelessly transmits the precoded data to the UE over the selected number of MIMO layers.
1. A method of operating a wireless access node to control Multiple Input Multiple Output (MIMO) layers for a User Equipment (UE), the method comprising:
a radio wirelessly exchanging network signaling with the User Equipment (UE) and exchanging the network signaling with baseband circuitry;
the baseband circuitry exchanging the network signaling with the radio, determining a UE capability for the UE, identifying radio band status for the UE, selecting a number of the MIMO layers for the UE based on the UE capability and the radio band status, precoding user data into precoded data for the selected number of MIMO layers, and transferring the precoded data to the radio; and
the radio receiving the precoded data from the baseband circuitry and wirelessly transmitting the precoded data to the UE over the selected number of MIMO layers.
2. The method claim 1 wherein:
the radio comprises a Fifth Generation New Radio (5GNR) radio and the UE capability comprises a 5GNR capability; and
the baseband circuitry selecting the number of the MIMO layers for the UE based on the UE capability and the radio band status and comprises selecting the number of the MIMO layers for the UE based on the 5GNR capability and the radio band status.
3. The method claim 1 wherein:
the radio comprises a millimeter-Wave (mmW) radio and the UE capability comprises a mmW capability; and
the baseband circuitry selecting the number of the MIMO layers for the UE based on the UE capability and the radio band status comprises selecting the number of the MIMO layers for the individual UE based on the mmW capability and the radio band status.
4. The method of claim 1 further comprising:
the baseband circuitry determining a Multiple User MIMO (MU-MIMO) status for the UE; and wherein
the baseband circuitry selecting the number of the MIMO layers for the UE comprises selecting the number of the MIMO layers based on the UE capability, the radio band status, and the MU-MIMO status.
5. The method of claim 1 further comprising:
the baseband circuitry determining an uplink noise rise at the radio; and wherein
the baseband circuitry selecting the number of the MIMO layers for the UE comprises selecting the number of the MIMO layers based on the UE capability, the radio band status, and the uplink noise rise.
6. The method of claim 1 further comprising:
the baseband circuitry determining an emergency status for the UE; and wherein
the baseband circuitry selecting the number of the MIMO layers for the individual UE comprises selecting the number of the MIMO layers based on the UE capability, the radio band status, and the emergency status.
7. The method of claim 1 further comprising:
the baseband circuitry determining a relay type for the UE; and wherein
the baseband circuitry selecting the number of the MIMO layers for the UE comprises selecting the number of the MIMO layers based on the UE capability, the radio band status, and the relay type.
8. The method of claim 1 further comprising:
the baseband circuitry determining a mobility factor for the UE; and wherein
the baseband circuitry selecting the number of the MIMO layers for the UE comprises selecting the number of the MIMO layers based on the UE capability, the radio band status, and the mobility factor.
9. The method of claim 1 further comprising:
the baseband circuitry determining a downlink error rate for the wireless access node; and wherein
the baseband circuitry selecting the number of the MIMO layers for the UE comprises selecting the number of the MIMO layers based on the UE capability, the radio band status, and the downlink error rate.
10. The method of claim 1 further comprising:
the baseband circuitry determining an amount of other UEs that are Radio Resource Control (RRC) Connected to the baseband circuitry; and wherein
the baseband circuitry selecting the number of the MIMO layers for the UE comprises selecting the number of the MIMO layers based on the UE capability, the radio band status, and the amount of the other UEs that are RRC Connected to the baseband circuitry.
11. A wireless access node to control Multiple Input Multiple Output (MIMO) layers for a User Equipment (UE), the wireless access node comprising:
a radio configured to wirelessly exchange network signaling with the User Equipment (UE) and exchange the network signaling with baseband circuitry;
the baseband circuitry configured to exchange the network signaling with the radio, determine a UE capability, identify radio band status for the UE, select a number of the MIMO layers for the UE based on the UE capability and the radio band status, precode user data into precoded data for the selected number of MIMO layers, and transfer the precoded data to the radio; and
the radio configured to receive the precoded data from the baseband circuitry and wirelessly transmit the precoded data to the UE over the selected number of MIMO layers.
12. The wireless access node of claim 11 wherein:
the radio comprises a Fifth Generation New Radio (5GNR) radio and the UE capability comprises a 5GNR capability; and
the baseband circuitry is configured to select the number of the MIMO layers for the UE based on the 5GNR capability and the radio band status to select the number of the MIMO layers for the UE based on the UE capability and the radio band status.
13. The wireless access node of claim 11 wherein:
the radio comprises a millimeter-Wave (mmW) radio and the UE capability comprises a mmW capability; and
the baseband circuitry is configured to select the number of the MIMO layers for the individual UE based on the mmW capability and the radio band status to select the number of the MIMO layers for the UE based on the UE capability and the radio band status.
14. The wireless access node of claim 11 further comprising:
the baseband circuitry configured to determine a Multiple User MIMO (MU-MIMO) status for the UE; and wherein
the baseband circuitry is configured to select the number of the MIMO layers based on the UE capability, the radio band status, and the MU-MIMO status to select the number of the MIMO layers for the UE.
15. The wireless access node of claim 11 further comprising:
the baseband circuitry configured to determine an uplink noise rise at the radio; and wherein
the baseband circuitry is configured to select the number of the MIMO layers based on the UE capability, the radio band status, and the uplink noise rise to select the number of the MIMO layers for the UE.
16. The wireless access node of claim 11 further comprising:
the baseband circuitry configured to determine an emergency status for the UE; and wherein
the baseband circuitry is configured to select the number of the MIMO layers based on the UE capability, the radio band status, and the emergency status to select the number of the MIMO layers for the individual UE.
17. The wireless access node of claim 11 further comprising:
the baseband circuitry configured to determine a relay type for the UE; and wherein
the baseband circuitry is configured to select the number of the MIMO layers based on the UE capability, the radio band status, and the relay type to select the number of the MIMO layers for the UE.
18. The wireless access node of claim 11 further comprising:
the baseband circuitry configured to determine a mobility factor for the UE; and wherein
the baseband circuitry is configured to select the number of the MIMO layers based on the UE capability, the radio band status, and the mobility factor to select the number of the MIMO layers for the UE.
19. The wireless access node of claim 11 further comprising:
the baseband circuitry configured to determine a downlink error rate for the wireless access node; and wherein
the baseband circuitry is configured to select the number of the MIMO layers based on the UE capability, the radio band status, and the downlink error rate to select the number of the MIMO layers for the UE.
20. The wireless access node of claim 11 further comprising:
the baseband circuitry configured to determine an amount of other UEs that are Radio Resource Control (RRC) Connected to the baseband circuitry; and wherein
the baseband circuitry is configured to select the number of the MIMO layers based on the UE capability, the radio band status, and the amount of the other UEs that are RRC Connected to the baseband circuitry to select the number of the MIMO layers for the UE.