Channel reconfiguration in a communications network based on measurements by wireless devices and network node
地域：
Stockholm
摘要
Mechanisms are provided for channel reconfiguration in a communications network where shared spectrum from a primary incumbent is used. A method is performed by a network node, which comprises obtaining RSSI measurements on the current channel from wireless devices. The wireless devices are served by the network node at a current channel in a current frequency interval within a frequency band. When the RSSI measurements trigger a need for the network node to perform channel reconfiguration, the network node selects a new channel based on RSSI measurements that it itself performs. The method comprises selecting a new channel in a new or the same frequency interval, in a new or the same frequency band, for serving the wireless devices based on RSSI measurements performed by the network node, and channel reconfiguration for the wireless devices is performed.
說明書
Embodiments presented herein relate to a method, a network node, a computer program, and a computer program product for channel reconfiguration in a communications network.
In communications networks, there may be a challenge to obtain good performance and capacity for a given communications protocol, its parameters and the physical environment in which the communications network is deployed.
Current practices for wireless mobile communications have focused on designing systems for wide area coverage in frequency bands that roughly extend between 400 MHz to 100 GHz, although there is no physical limitation that strictly limits such systems to that range. The traffic growth on mobile networks has grown to the point where the mobile industry is consistently starved for spectrum.
Every generation of wireless technology has improved the metrics underlying spectrum efficiency, typically measured as area efficiency and denominated in the ratio data rate supported per unit bandwidth per cell ((b/s)/Hz/cell).
權利要求
The invention claimed is:1. A method for channel reconfiguration in a communications network, the method being performed by a network node, the method comprising:obtaining received signal strength indicator (RSSI) measurements from wireless devices, the wireless devices being served by the network node at a current channel in a current frequency interval within a frequency band, the RSSI measurements triggering a need for the network node to perform channel reconfiguration; and selecting a new channel in a new or the same frequency interval, in a new or the same frequency band, for serving the wireless devices by the network node based on RSSI measurements performed by the network node, thereby performing the channel reconfiguration. 2. The method according to claim 1 , wherein the current channel is located at a current frequency, wherein the RSSI measurements from the wireless devices comprise RSSI measurements performed at the current frequency as well as at at least one further frequency, the at least one further frequency being located at a frequency offset to the current frequency. 3. The method according to claim 2 , wherein the channel reconfiguration is triggered when the RSSI measurements performed at the at least one further frequency indicate high interference. 4. The method according to claim 2 , wherein the channel reconfiguration is triggered when a difference between the RSSI measurements performed at the current frequency and the RSSI measurements performed at the at least one further frequency is smaller than a threshold value for at least a portion of the wireless devices. 5. The method according to claim 2 , wherein the new frequency interval is selected to be distanced to at least one of the at least one further frequency, as well as to the current frequency. 6. The method according to claim 1 , wherein the channel reconfiguration is triggered when the RSSI measurements from at least a portion of all wireless devices from which RSSI measurements are received indicate high interference. 7. The method according to claim 1 , wherein the channel reconfiguration is triggered when the RSSI measurements from at least a portion of wireless devices with a high UE category, from which RSSI measurements are received indicate high interference. 8. The method according to claim 1 , wherein the RSSI measurements performed by the network node are performed prior to being triggered to perform channel reconfiguration. 9. The method according to claim 1 , wherein the RSSI measurements performed by the network node are performed in response to being triggered to perform channel reconfiguration. 10. The method according to claim 1 , further comprising:requesting, from a spectrum access system (SAS) access to use the new channel. 11. The method according to claim 1 , further comprising:notifying the wireless devices of the new channel, in order to serve the wireless devices in the new channel. 12. The method according to claim 1 , wherein the current channel is located at a current frequency in the current frequency interval and the new channel is located at a new frequency in the new frequency interval. 13. The method according to claim 12 , wherein the new frequency interval is selected such that the new frequency is located outside the current frequency interval. 14. The method according to claim 1 , wherein the current frequency interval and the new frequency interval are part of an unlicensed frequency band. 15. The method according to claim 1 , wherein the current frequency interval and the new frequency interval are selected to be located within the frequency band extending from 3550 MHz and 3700 MHz. 16. The method according to claim 1 , wherein the current frequency interval and the new frequency interval are selected to be located within a Citizens Broadband Radio Service (CBRS) frequency band. 17. The method according to claim 1 , wherein one of the frequency band and the new frequency band is a Citizens Broadband Radio Service (CBRS) frequency band and the other of the frequency band and the new frequency band is a third generation partnership project (3GPP) frequency band. 18. The method according to claim 1 , wherein the network node is a Citizens Broadband Radio Service Device (CBSD). 19. A network node for channel reconfiguration in a communications network, the network node comprising processing circuitry, the processing circuitry being configured to cause the network node to:obtain received signal strength indicator (RSSI) measurements from wireless devices, the wireless devices being served by the network node at a current channel in a current frequency interval within a frequency band, the RSSI measurements triggering a need for the network node to perform channel reconfiguration; and select a new channel in a new or the same frequency interval, in a new or the same frequency band, for serving the wireless devices by the network node based on RSSI measurements performed by the network node, thereby performing the channel reconfiguration. 20. A network node for channel reconfiguration in a communications network, the network node comprising:processing circuitry; and a storage medium storing instructions that, when executed by the processing circuitry, cause the network node to:obtain received signal strength indicator (RSSI) measurements from wireless devices, the wireless devices being served by the network node at a current channel in a current frequency interval within a frequency band, the RSSI measurements triggering a need for the network node to perform channel reconfiguration; and select a new channel in a new or the same frequency interval, in a new or the same frequency band, for serving the wireless devices by the network node based on RSSI measurements performed by the network node, thereby performing the channel reconfiguration. 21. The network node according to claim 20 , wherein the network node is a Citizens Broadband Radio Service Device (CBSD). 22. A network node for channel reconfiguration in a communications network, the network node comprising:an obtain module configured to obtain received signal strength indicator (RSSI) measurements from wireless devices, the wireless devices being served by the network node at a current channel in a current frequency interval within a frequency band, the RSSI measurements triggering a need for the network node to perform channel reconfiguration; and a select module configured to select a new channel in a new or the same frequency interval, in a new or the same frequency band, for serving the wireless devices by the network node based on RSSI measurements performed by the network node, thereby performing the channel reconfiguration.
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