Wireless mesh network
Among other things, aspects, features, and implementations of wireless mesh networks and wireless mesh network devices are described.
1. A wireless network comprising
a network controller connected to a core network;
a first radio node linked to the network controller and having a first coverage area; and
a second radio node linked to the network controller and having a second coverage area,
the network controller, the first radio node, and the second radio node comprising one or more processors and storage for instructions executable by the one or more processors to cause:
the first radio node and the second radio node to broadcast a common cell identifier,
airlink protocol layers to be executed by a connected user device and by the first radio node for communication on a wireless access link, the airlink protocol layers being processed partially in the first radio node and partially in the network controller,
the processing of the airlink protocol layers by the first radio node including functions of a medium access layer, and
when the connected user device moves from the coverage area of the first radio node to the coverage area of the second radio node, the wireless network is configured to perform a handover of the connected user device from the first radio node to the second radio node by transferring a current state of the connected user device from the first radio node to the second radio node without configuring the user device.
2. The wireless network of claim 1 in which the processing of the airlink protocol layers by the first radio node includes processing of scheduling and hybrid automatic repeat request (ARQ) functions of the medium access layer.
3. The wireless network of claim 1 , in which the first radio node sends a beam switch request message based on beam measurement reports received from the connected user device to cause a beam switch to the second radio node,
the network controller sends a beam switch command message to the second radio node,
the first radio node sends a state of the connected user device to the second radio node, and
the second radio node transmits downlink user data to the connected user device using a spatial filter associated with a reference signal reported by the connected user device.
4. The wireless network of claim 1 , in which
two or more connected user devices are configured by the network controller to transmit a sounding reference signal (SRS) set on SRS time occasions, each transmitted SRS in the set uses as a spatial filter reference a different Synchronization Signal Blocks (SSB) from the first and second radio nodes, and the SRS transmissions of a first user device of the two of more connected devices carry an identifier of the connected user device of the two of more connected devices, and
the first and second radio nodes perform measurements on SRS time occasions to detect the identifier of the connected user device and to determine a received signal level.
5. The wireless network of claim 1 comprising a mesh node linked to the network controller through a radio node having a third coverage area.
6. The wireless network of claim 5 in which the mesh node broadcasts the common cell identifier, and
when the connected user device moves from the coverage area of the first radio node to the coverage area of the mesh node, the wireless network performs a handover of the connected user device from the first radio node to the mesh node without reconfiguring the user device by transferring a current state of the device from the first radio node to the mesh node.
7. The wireless network of claim 6 comprising
two or more connected user devices configured by the network controller to transmit a sounding reference signal (SRS) set on SRS time occasions, and each transmitted SRS in the SRS set uses as the spatial filter reference a different SSB transmission from the first and second radio nodes and the SRS transmissions of a first user device of the two of more connected devices carry an identifier of the connected user device of the two of more connected devices, and
the mesh node performing measurements on the SRS time occasions to detect the identifier of the connected user device and to determine a received signal level.
8. The wireless network of claim 6 , in which
the first radio node sends a beam switch request message based on beam measurement reports received from the connected user device to cause a beam switch to the mesh node,
the network controller sends a beam switch command message to the mesh node,
the first radio node sends a state of the connected user device to the mesh node, and
the mesh node transmits downlink user data to the connected user device using a spatial filter associated with a reference signal reported by the user device.
9. The wireless network of claim 8 , in which
the connected user device is configured with two semi-persistent reporting configurations,
wherein a configured physical uplink control channel (PUCCH) resource in the first semi-persistent reporting configuration is spatially linked to a reference signal transmitted by the first radio node, and
wherein a configured PUCCH resource for the second semi-persistent reporting configuration is linked to a reference signal transmitted by the second radio node, and
wherein the first semi-persistent reporting configuration is activated and the second semi-persistent reporting is deactivated when the first radio node is transmitting to the connected user device, and
wherein the first semi-persistent reporting configuration is deactivated and the second semi-persistent reporting configuration is activated when the second radio node is transmitting to the connected user device.
10. The wireless network of claim 9 , in which a first user device is configured with a third semi-persistent reporting configuration to send a report to the first radio node on a same time occasions used by the connected first user device, and a PUCCH resource for the third semi-persistent reporting configuration is spatially linked to the same reference signal transmitted by the first radio node.
11. A wireless network comprising
a first radio node and a second radio node linked to a controller for a mesh network, the controller being connected to a core network, in which the first radio node and the second radio node are configured to broadcast a common cell identifier,
the controller and the radio nodes comprising one or more processors and storage for instructions executable by the one or more processors to establish:
airlink protocol layers executed by a user device and by the mesh network for communication on a wireless access link, the airlink protocol layers being processed partially in the radio node and partially in the controller,
the user device being dual connected and configured to simultaneously communicate with the first and second radio nodes using:
a first MAC entity associated with a reference signal transmitted by the first radio node and used to communicate with a MAC entity in the first radio node, and
a second MAC entity associated with a reference signal transmitted by the second radio node and used to communicate with a MAC entity in the second radio node,
the link between the controller and the radio nodes carrying RLC SDUs to the user device for first downlink transmissions and carrying RLC SDUs or RLC SDU segments to the user device for downlink retransmissions, and
when the user device moves from a coverage area of the first radio node to a coverage area of the second radio node, the wireless network is configured to perform a handover of the user device from the first radio node to the second radio node by transferring a current state of the user device from the first radio node to the second radio node without configuring the user device.
12. The wireless network of claim 1 , in which the first radio node and second radio node are co-located in a same physical enclosure.
13. The wireless network of claim 12 , in which the first radio node sends a beam switch message to the connected user device based on beam measurement reports received from the connected user device to cause a beam switch to the second radio node.
14. The wireless network of claim 1 , wherein the wireless network is configured to perform the handover, when the connected user device moves from the coverage area of the first radio node to the coverage area of the second radio node, by transferring a current layer two state of the connected user device from the first radio node to the second radio node without any layer three configuration of the user device.