Supplemental node transmission assistance in a wireless communications network
Supplemental node transmission assistance in a wireless network provides for transmissions between a wireless network and wireless user equipment in a first direction using a serving node of the wireless network while providing for transmissions between the wireless network and wireless user equipment in a second direction using a supplemental node of the wireless network. The supplemental node is selected based on providing better channel conditions between the network and the user equipment in the second direction than the serving node. The supplemental node thus provides transmission assistance for the serving node in order to provide the best available downlink and uplink communications between the user equipment and the network.
1. A method of wireless communications between a wireless communications network and wireless user equipment, the method comprising:
selecting a first node of the wireless communications network as a serving node for the user equipment;
using the serving node for transmissions in a first direction between the user equipment and the wireless communications network;
selecting a second node of the wireless communications network as a supplemental node; and
using the supplemental node for transmissions in a second direction between the wireless communications network and the user equipment;
wherein selecting the second node includes selecting a second node of the wireless communications network that receives a stronger uplink signal from the user equipment than the serving node as the supplemental node;
wherein selecting the second node further comprises selecting one or more nodes of the wireless communication network such that the one or more nodes and the second node serve as a plurality of uplink supplemental nodes, forming an uplink supplemental node set;
wherein transmissions in the first direction are downlink transmissions from the serving node to the user equipment;
wherein transmissions in the second direction are uplink transmissions from the user equipment to the supplemental node;
wherein using the supplemental node for transmissions between the wireless communications network and the user equipment comprises sending uplink scheduling parameters from the serving node to the supplemental node; and
wherein using the supplemental node further comprises receiving uplink transmissions from the user equipment by the uplink supplemental nodes in the uplink supplemental node set.
2. The method of claim 1 , wherein the first node and the second node are wireless communications network nodes selected from a group of wireless communications network nodes consisting of E-UTRAN Node B nodes, relay nodes, and other low power transmission nodes.
3. A method of wireless communications between a wireless communications network and wireless user equipment, the method comprising:
selecting a first node of the wireless communications network as a serving node for the user equipment;
using the serving node for transmissions in a first direction between the user equipment and the wireless communications network;
selecting a second node of the wireless communications network as a supplemental node; and
using the supplemental node for transmissions in a second direction between the wireless communications network and the user equipment;
wherein selecting the second node includes selecting a second node of the wireless communications network that receives a stronger uplink signal from the user equipment than the serving node as the supplemental node;
wherein transmissions in the first direction are downlink transmissions from the serving node to the user equipment;
wherein transmissions in the second direction are uplink transmissions from the user equipment to the supplemental node; and
using the supplemental node for transmissions between the wireless communications network and the user equipment includes:
receiving uplink transmission data from the user equipment by the supplemental node; and
sending the received uplink transmission data from the supplemental node to the serving node.
4. The method of claim 1 , further comprising adapting parameters of a wireless communications link for the transmissions in the second direction by the serving node.
5. The method of claim 4 , further comprising determining retransmission statistics for transmissions in the second direction and adapting parameters of the wireless communications link for the transmissions in the second direction based on the determined retransmission statistics.
6. A wireless communications network for wireless communications with user equipment, the network comprising:
a serving node adapted for transmissions in a first direction between the user equipment and the wireless communications network and adapted for selecting a supplemental node; and
a supplemental node, wherein the supplemental node is selected by the serving node and adapted for transmissions in a second direction between the wireless communications network and the user equipment;
wherein the supplemental node receives a stronger uplink signal from the user equipment than the serving node;
wherein transmissions in the first direction are downlink transmissions from the serving node to the user equipment;
wherein transmissions in the second direction are uplink transmissions from the user equipment to the supplemental node; and
wherein the serving node is adapted to send uplink scheduling parameters from the serving node to the supplemental node;
wherein the serving node is further adapted to select one or more nodes of the wireless communications network such that the one or more nodes and the supplemental node serve as a plurality of uplink supplemental nodes, forming an uplink supplemental node set, and
wherein each of the uplink supplemental nodes in the uplink supplemental node set is adapted to receive uplink transmissions from the user equipment.
7. The network of claim 6 , wherein the serving node and the supplemental node are wireless communications network nodes selected from the group of wireless communications network nodes consisting of E-UTRAN Node B nodes, relay nodes, and other low power transmission nodes.
8. A wireless communications network for wireless communications with user equipment, the network comprising:
a serving node adapted for transmissions in a first direction between the user equipment and the wireless communications network and adapted to select a supplemental node; and
a supplemental node, wherein the supplemental node is selected by the serving node and adapted for transmissions in a second direction between the wireless communications network and the user equipment;
wherein the supplemental node receives a stronger uplink signal from the user equipment than the serving node;
wherein transmissions in the first direction are downlink transmissions from the serving node to the user equipment;
wherein transmissions in the second direction are uplink transmissions from the user equipment to the supplemental node; and
wherein the supplemental node is adapted to receive uplink transmission data from the user equipment and to send the received uplink transmission data from the supplemental node to the serving node.
9. The network of claim 6 , wherein the serving node is adapted to adapt parameters of a wireless communications link for the transmissions in the second direction.
10. The network of claim 9 , wherein the serving node is adapted to determine retransmission statistics for transmissions in the second direction and to adapt parameters of the wireless communications link for the transmissions in the second direction on the determined retransmission statistics.
11. A computer program product, comprising a computer readable storage medium having computer usable program code stored thereon for controlling a processing unit of a node of a wireless communications network to:
be selected to operate as a serving node adapted for transmissions in a first direction between the user equipment and the wireless communications network and adapted to select a supplemental node; and
be selected by a node of the wireless communications network operating as the serving node to operate as a supplemental node adapted for transmissions in a second direction between the wireless communications network and the user equipment;
wherein transmissions in the first direction are downlink transmissions from the node of the wireless communications network operating as the serving node to the user equipment;
wherein transmissions in the second direction are uplink transmissions from the user equipment to the node of the wireless communications network operating as the supplemental node; and
wherein the computer usable program code is further adapted for controlling a processing unit of a node of the wireless communications network to:
when operating as the serving node, send uplink scheduling parameters from the serving node to another node of the communications network operating as the supplemental node, and select one or more nodes of the wireless communication network such that the one or more nodes and the supplemental node serve as uplink supplemental nodes forming an uplink supplemental node set.
12. A computer program product, comprising a computer readable storage medium having computer usable program code stored thereon for controlling a processing unit of a node of a wireless communications network to:
be selected to operate as a serving node adapted for transmissions in a first direction between the user equipment and the wireless communications network and adapted to select a supplemental node; and
be selected by a node of the wireless communications network operating as the serving node to operate as a supplemental node adapted for transmissions in a second direction between the wireless communications network and the user equipment;
wherein transmissions in the first direction are downlink transmissions from the node of the wireless communications network operating as the serving node to the user equipment; and
wherein transmissions in the second direction are uplink transmissions from the user equipment to the node of the wireless communications network operating as the supplemental node;
wherein the computer usable program code is further adapted for controlling a processing unit of a node of the wireless communications network to:
when operating as the supplemental node, receive uplink transmission data from the user equipment and send the received uplink transmission data from the supplemental node to another node of the wireless communications network operating as the serving node.
13. The computer program product of claim 11 , wherein the computer usable program code is further adapted for controlling a processing unit of a node of the wireless communications network to:
when operating as a serving node, adapt parameters of a wireless communications link for transmissions in the second direction.