Back to results
US 2019/0357232 A1Published application
Dynamic uplink reuse in a c-ran
AssigneeCommScope Technologies LLC
InventorsBalaji B Raghothaman, Stuart D. Sandberg, Kompella Purnima, Anil Bapat
Life of this patent
Estimating the term…
Abstract
This disclosure is directed to techniques for implementing uplink spatial reuse in a C-RAN.
Claims43
A system to provide wireless service comprising:
- a controller;
- and
- a plurality of radio points;
- wherein each of the radio points is associated with at least one antenna and remotely located from the controller, wherein the plurality of radio points is communicatively coupled to the controller;
- wherein the controller and the plurality of radio points are configured to implement a base station in order to provide wireless service to a plurality of user equipment (UEs) using a cell;
- wherein the controller is communicatively coupled to a core network of a wireless service provider;
- wherein the controller is configured to implement a scheduler to schedule uplink transmissions from the UEs;
- wherein the controller is configured to implement a combining receiver to receive uplink transmissions from each UE, the combining receiver configured to combine data indicative of the uplink transmissions from each UE as received at each radio point included in a combining zone assigned to that UE and communicated to the controller;
- wherein the controller is configured to assign, to each UE, a respective minimum combining zone comprising a respective minimum subset of the radio points for use as the combining zone of the combining receiver for receiving uplink transmission from that UE;
- wherein the controller is configured to assign, to each UE, a respective signal zone comprising a respective subset of the radio points that can be included in the combining zone of the combining receiver for receiving uplink transmission from that UE;
- wherein the scheduler is configured to determine if multiple UEs are able to make respective uplink transmissions during a respective same time-and-frequency resource based on the respective minimum combining zones and signal zones assigned to the UEs and allocate time-and-frequency resources to the UEs using the minimum combining zones assigned to the UEs;
- and
- wherein the scheduler is configured to, after allocating time-and-frequency resources to the UEs, attempt to expand the combining zones used for receiving uplink transmissions.
10 more elements
A system to provide wireless service comprising:
- a controller;
- and
- a plurality of radio points;
- wherein each of the radio points is associated with at least one antenna and remotely located from the controller, wherein the plurality of radio points is communicatively coupled to the controller;
- wherein the controller and the plurality of radio points are configured to implement a base station in order to provide wireless service to a plurality of user equipment (UEs) using a cell;
- wherein the controller is communicatively coupled to a core network of a wireless service provider;
- wherein the controller is configured to implement a scheduler to schedule uplink transmissions from the UEs;
- wherein the scheduler is configured to determine if multiple UEs are able to make respective uplink transmissions during a respective same time-and-frequency resource, and, for any multiple UEs that are able to make respective uplink transmissions during the respective same time-and-frequency resource, schedule said multiple UEs to make respective uplink transmissions during the respective same time-and-frequency resource and assign respective UE-specific demodulation reference signal (DM-RS) cyclic shifts to said multiple UEs;
- and
- wherein each of the UE-specific DM-RS cyclic shifts have an associated distance between that UE-specific DM-RS cyclic shift and each of the other UE-specific DM-RS cyclic shifts, wherein the DM-RS cyclic shifts are assigned to maximize the respective distances.
7 more elements
A system to provide wireless service comprising:
- a controller;
- and
- a plurality of radio points;
- wherein each of the radio points is associated with at least one antenna and remotely located from the controller, wherein the plurality of radio points is communicatively coupled to the controller;
- wherein the controller and the plurality of radio points are configured to implement a base station in order to provide wireless service to a plurality of user equipment (UEs) using a cell;
- wherein the controller is communicatively coupled to a core network of a wireless service provider;
- wherein the controller is configured to implement a scheduler to schedule uplink transmissions from the UEs;
- wherein the scheduler is configured to determine if multiple UEs are able to make respective uplink transmissions during a respective same time-and-frequency resource, and, for any multiple UEs that are able to make respective uplink transmissions during the respective same time-and-frequency resource, schedule said multiple UEs to make respective uplink transmissions during the respective same time-and-frequency resource;
- and
- wherein the controller is configured to perform transmit power control for the uplink transmissions from the UEs using at least one of the following:
- a closed-loop UE-specific target SINR that is adapted for each UE based on a power headroom reported for that UE;
- and
- a closed-loop UE-specific measured SINK that uses:
- a signal power measurement based on uplink transmissions from that UE, and an interference-plus-noise measurement based on uplink transmissions from all scheduled UEs.
11 more elements
A system to provide wireless service comprising:
- a controller;
- and
- a plurality of radio points;
- wherein each of the radio points is associated with at least one antenna and remotely located from the controller, wherein the plurality of radio points is communicatively coupled to the controller;
- wherein the controller and the plurality of radio points are configured to implement a base station in order to provide wireless service to a plurality of user equipment (UEs) using a cell;
- wherein the controller is communicatively coupled to a core network of a wireless service provider;
- wherein the controller is configured to implement a scheduler to schedule uplink transmissions from the UEs;
- wherein the scheduler is configured to perform link adaptation for uplink transmissions from the UEs by selecting a modulation and coding scheme (MCS) for each UE based on a measured signal-to-interference-plus-noise ratio (SINR) for the UE and a sequence of acknowledgement and negative acknowledgement (ACK/NACK) messages associated with the uplink transmissions from the UE.
5 more elements
Dependencies are inferred from the claim text.