Support for asynchronous adaptation to uplink and downlink traffic demands for wireless communication
First Claim
1. A method for interference management and traffic adaptation in a wireless network with different Up Link and Down Link time slots and adaptive, asynchronous directional traffic resource allocation, the method comprising:
- measuring, at a first eNodeB, a unit of coupling information between the first eNodeB and an adjacent eNodeB;
making a clustering determination based on the unit of coupling information, wherein the clustering determination comprises one of a first determination that the first eNodeB and the adjacent eNodeB belong in a common cluster and a second determination that the first eNodeB and the adjacent eNodeB are isolated, wherein making the clustering determination based on the unit of coupling information further comprises reaching the first determination where at least one of a first condition and a second condition is met, wherein;
the first condition is that a performance of the first eNodeB is not substantiall egraded by a transmission direction of the adjacent eNodeB, andthe second condition is that a change of the transmission direction of the adjacent eNodeB does not substantially degrade the performance of the first eNodeB; and
,otherwise reaching the second determination; and
configuring the first eNodeB and the adjacent eNodeB with a common Up Link-Down Link (UL-DL) configuration where the fi rst determination has been made and configuring the first eNodeB with a first UL-DL configuration independently from a potentially differing UL-DL configuration pertaining to the adjacent eNodeB where the second determination has been made.
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Accused Products
Abstract
Technology is discussed to allow transmission points within a Wireless Wide Area Network (WWAN) to adapt to Up Link (UL) and Down Link (DL) traffic demands independently. To mitigate potential interference arising from transmission points scheduled for conflicting UL and DL transmissions, measurements between transmission points can be made to indicate a level of coupling. Based on the various levels of coupling between transmission points, clusters can be formed. Where a high level of coupling is present, transmission points can be included in a common cluster. Where a low level of coupling is present, they can be isolated. Transmission points within the same cluster are scheduled with a common pattern of UL and DL transmissions to avoid interference. Transmission points in different clusters can have different patterns of UL and DL transmission to independently adapt to the relative demands for UL and DL transmissions experienced within these different clusters.
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Citations
24 Claims
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1. A method for interference management and traffic adaptation in a wireless network with different Up Link and Down Link time slots and adaptive, asynchronous directional traffic resource allocation, the method comprising:
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measuring, at a first eNodeB, a unit of coupling information between the first eNodeB and an adjacent eNodeB; making a clustering determination based on the unit of coupling information, wherein the clustering determination comprises one of a first determination that the first eNodeB and the adjacent eNodeB belong in a common cluster and a second determination that the first eNodeB and the adjacent eNodeB are isolated, wherein making the clustering determination based on the unit of coupling information further comprises reaching the first determination where at least one of a first condition and a second condition is met, wherein; the first condition is that a performance of the first eNodeB is not substantiall egraded by a transmission direction of the adjacent eNodeB, and the second condition is that a change of the transmission direction of the adjacent eNodeB does not substantially degrade the performance of the first eNodeB; and
,otherwise reaching the second determination; and configuring the first eNodeB and the adjacent eNodeB with a common Up Link-Down Link (UL-DL) configuration where the fi rst determination has been made and configuring the first eNodeB with a first UL-DL configuration independently from a potentially differing UL-DL configuration pertaining to the adjacent eNodeB where the second determination has been made. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for adapting to asymmetric uplink and Down Link traffic loads in a wireless network comprising:
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a coupling measurement module, operating at one of a first eNodeB and a network level entity, configured to a make coupling measurement on a Down Link (DL) transmission from an adjacent eNodeB to the first eNodeB, wherein the coupling measurement module is implemented as a hardware circuit or is stored in a memory device for execution by a computer processor; an analysis module, in communication with the coupling measurement module, configured to compare the coupling measurement to a coupling threshold to determine that the first eNodeB and the adjacent eNodeB are coupled where the coupling measurement is one of at the coupling threshold and above the coupling threshold, and to determine that the first eNodeB and the adjacent eNodeB are isolated where the coupling measurement is below the coupling threshold, wherein the analysis module is implemented as a hardware circuit or is stored in a memory device for execution by a computer processor; a configuration module, in communication with the analysis module, configured to identify a common Up Link (UL)-DL configuration where the first eNodeB and the adjacent eNodeB are coupled and a first UL-DL configuration for the first eNodeB independently of a second UL-DL configuration for the adjacent eNodeB where the first eNodeB and the adjacent eNodeB are isolated, wherein the configuration module is implemented as a hardware circuit or is stored in a memory device for execution by a computer processor; and an update module, in communication with the configuration module, wherein the update module is implemented as a hardware circuit or is stored in a memory device for execution by a computer processor and the update module is configured to do one of; update the common UL-DL configuration to adapt in substantially real time to changing traffic direction needs at both the first eNodeB and the adjacent eNodeB where the first eNodeB and the adjacent eNodeB are coupled in the common cluster; and update the first UL-DL configuration independently of the second UL-DL configuration to adapt substantially in real time to changing traffic direction needs at the first eNodeB where the first eNodeB and the adjacent eNodeB are isolated. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A computer program product comprising a non-transitory computer usable medium having a computer readable program code embodied therein, the computer readable program code adapted to be executed to implement instructions for a method for mitigating interference during adaption to asymmetric DL transmission among multiple eNodeBs, the method comprising:
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determining a coupling level between a first eNodeB and each of at least one additional eNodeB; clustering the first eNodeB with any eNodeB from the at least one additional eNodeB with a corresponding coupling level greater than a coupling threshold to create a common cluster, wherein the common cluster comprises the first eNodeB and the at least one additional eNodeB; setting a common Time Division Duplex (TDD) configuration for the common cluster to avoid interference between uplink (UL) traffic and DL (downlink) traffic; and
at least one of;communicating directional traffic information from the first eNodeB to the at least one additional eNodeB in the common cluster over a backhaul link; and receiving at the first eNodeB directional traffic information over the backhaul link from the at least one additional eNodeB in the common cluster. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A device for avoiding interference while adapting to asynchronous directional traffic at various eNodeBs in a wireless network, the device comprising:
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an interference module configured to estimate an interference level from a Down Link (DL) eNodeB as received at the first eNodeB, wherein the interference module is implemented as a hardware circuit or is stored in a memory device for execution by a computer processor; an isolation module, in communication with the interference module and operating at the first eNodeB, configured to indicate where the interference level is sufficiently low to allow the first eNodeB to be isolated by accommodating UL transmission while the DL eNodeB transmits a DL transmission and where the interference level is sufficiently high to require the first eNodeB and the DL eNodeB to be aggregated in a common cluster to synchronize transmission directions, wherein the isolation module is implemented as a hardware circuit or is stored in a memory device for execution by a computer processor; and a traffic response module, in communication with the isolation module and operating at the first eNodeB, configured to create a Time Division Duplex (TDD) configuration to respond to directional traffic for eNodeBs associated with the first eNodeB in the common cluster where the first eNodeB belongs to the common cluster and independently respond to directional traffic for the first eNodeB where the first eNodeB is isolated, wherein the traffic response module is implemented as a hardware circuit or is stored in a memory device for execution by a computer processor; and an optimization module, in communication with the isolation module and operating at the first eNodeB, wherein the optimization module is implemented as a hardware circuit or is stored in a memory device for execution by a computer processor and the optimization module is configured to optimize a coupling threshold used to determine whether the first eNodeB belongs to the common cluster by; monitoring the inter-cell interference level from opposite transmission directions of adjacent cells; and analyzing traffic adaptation capabilities and traffic demands within a set of isolated cells and a set of common cell clusters. - View Dependent Claims (21, 22, 23, 24)
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Specification