Cisco Technology, Inc.

Telefonaktiebolaget Lm Ericsson (Publ)

Hari Narayanan Rangarajan

Yvan Royon

Tak Ming Pang

Paul Jeffrey Stager

David Stuart Kloper

Jyoti Raju

Julan Hsu

Hang Jin

Allan Thomson

Sandeep Shetty

Johannes Petrus Kruys

Raghuram Rangarajan

Tak Ming Francis Pang

Christopher Graham Meil

Shobhit Sonakiya

Peyman Talebi Fard

Min Cao

Seema Nayak

Jianxia Ning

In an example embodiment disclosed herein there is described a multi-radio device which comprises a first radio that first radio comprises a transmitter, and a second radio that second radio comprises a receiver that monitors a channel to obtain data representative of a predefined channel parameter. The second radio is operable to receive a signal from the first radio that indicates when the transmitter of the first radio is transmitting. The receiver of the second radio selectively excludes data representative of a predefined channel parameter based on whether the transmitter of the first radio is transmitting.

Obtaining accurate measurements of a channel parameter by a multi-radio device with a co-located interfering radio

In an example embodiment, an apparatus comprising an interface configured to communicate with at least one wireless transceiver, and a controller coupled to the interface. The controller is configured to determine a predefined characteristic such as current load and/or interference for a wireless channel associated with the at least one wireless transceiver. The controller is operable to suppress sending a probe response in response to the at least one wireless transceiver receiving a probe request, wherein how often probe responses are suppressed is based on the predefined characteristic for the wireless channel.

Load based probe response scheduling

A method is implemented by a node for implementing computational transformations conveyed in a content centric networking (CCN) request by a computation engine. The method includes receiving a CCN request containing a unique resource identifier (URI) and a computation field, decoding the computation field to determine a computation pipeline, retrieving a first content object identified by the URI, executing the computation pipeline with the first content object as input, and encoding a result of the computation pipeline as a second content object.

Transformative requests

A method is implemented by a content centric network (CCN) naming layer executed by a network device. The naming layer is configured to enable processing of regular expressions as part of a hierarchical CCN name, where regular expressions are sequences of characters that form a search pattern. The method processes regular expressions utilized in a one to many scenario between a plurality of CCN clients and at least one CCN serving node. The method includes receiving a CCN interest from a CCN forwarding layer, accessing a forwarding information base (FIB) to find FIB entries matching a path of the CCN name and the regular expression, accessing a content store to find content objects matching the FIB entries, and creating a new CCN interest for each of the FIB entries not found in the content store.

CCN name patterns

A method provides temporal caching in a content centric networking (CCN) network. The temporal caching is implemented by a CCN node. The method fetches and caches a group of content objects having a temporal relationship. The method includes selecting a first CCN interest packet including a first CCN name of a first content object from the group of content objects, adding an entry for the first CCN name to a correlation table, and selecting at least a second CCN interest packet including a second CCN name of a second content object from the group of content objects. The method further includes correlating the second CCN name with the first CCN name by determining a request sequence for the first content object and the second content object, and updating the entry to correlate the first CCN name with the second CCN name.

Temporal caching for ICN

A method in a first content centric networking (CCN) access point of a CCN network of enabling seamless mobility of a mobile device is disclosed. The method includes detecting a handover initiation event that is an indication that a handover of the mobile device from the first CCN access point to a second CCN access point from a group of one or more CCN access points of the CCN network is initiated. In response to detecting the handover initiation event, the method continues with starting transmission, to the group of CCN access points, of one or more pending interests associated with the mobile device. The method further includes detecting a handover completion event, and stopping, in response to detecting the handover completion event, the transmission of the one or more pending interests associated with the mobile device.

Handover of a mobile device in an information centric network

In an example embodiment, an access point or wireless local area network controller programs an opaque cookie into a wireless client. The cookie carries association detail and current traffic information of the client. When the client roams to a new access point, the client presents the cookie to the new access point.

Wireless client association and traffic context cookie

The direction of movement of a wireless local area network client device, determined based on data generated by one or more sensors onboard the client device, is provided by the client device to its serving access point. Using the direction of movement information, a list is generated of neighbor access points that are likely to be in the path of travel of the client device. The list may be generated by the serving access point or another infrastructure device, e.g., a wireless network controller. The serving access point sends the list of neighbor access points to the client device to enable the client device to select an access point to roam to at the appropriate time.

Direction aware neighbor list infrastructure assisted roaming

In an example embodiment, an access point (AP) uses out-of-band signaling on a single non-DFS (Dynamic Frequency Selection) frequency band radio in an N-radio system to synchronize information with neighboring APs and to learn about their radio interfaces. This enables the AP to be able to acquire information about neighbor APs on different frequency bands and to build and maintain mesh routing structures while minimizing backhaul down-time.

Building wireless routing structures using out of band signaling

In an example embodiment, a wireless distribution system obtains data for advertised data flows, such as multimedia traffic flows, by snooping attribute details of session description protocol (SDP) announcements. The wireless distribution system can use the data for functions such as admissions control, load balancing, and/or multicast to unicast conversion decisions.

Auto-configuration of network parameters for multimedia traffic using session description protocol

In an example embodiment, a beacon is sent on all available interfaces of a device comprising data indicating the operating parameters of all interfaces of the device. A beacon containing data about the configuration of a first interface and a second interface is sent on both the first interface and the second interface. The beacon may suitably comprise data indicating the protocol, channel, and spanning trees for the interface. If communication on the primary interface becomes unavailable, the data in the beacons can be used to facilitate switching communication to the secondary interface.

Seamless tree creation and movement

Described in an example embodiment herein is a procedure that comprises sampling one or more channels that are not in use for a short time at certain intervals. In particular embodiments, the interval duration is irregular so as to prevent 'out of step' lock with a radar's pulses. During the sampling period, detection events are stored in terms of start time and duration. If potential radar events are detected, the channels are sampled for a longer, second interval to determine whether the detection events are indicative of radar. The length of the sampling period determines the number of samples needed to get an acceptable detection probability.

Growing community of inventors

Milpitas, CA, United States of America

Hari Narayanan Rangarajan