Motorola Corporation

Motorola Mobility LLC

Nokia Solutions and Networks Oy

Google Inc.

Mark J Marsan

Ravi M Adatrao

Pramod Karnam

Mark A Birchler

Garry C Hess

Michael N Kloos

Subramanian S Iyer

Kirk Ingemunson

Apurv Mathur

John McFarland Harris

Paul M Erickson

Kenneth J Crisler

Leigh M Chinitz

David R Maas

Bruce M Drawert

Lawrence J Marturano

Lei Shi

Michael S Palac

Xun Fan

Stinson Mathai

Larry P Hemenway

Donivon Hettich

A method, a device and a computer readable media for communication are disclosed. The method () comprises determining, based on a target error rate between a first device and a second device, a code rate for transmitting data from the second device to the first device (). The method also comprises adjusting the code rate based on an amount of the data and an amount of resource available for transmitting the data (). The method further comprises updating the target error rate for transmitting subsequent data from the second device to the first device based on an amount of the adjustment of the code rate (). An improved link adaption scheme and improve uplink/downlink transmission performance of the communication system are provided.

Optimized link adaption

In a communication system where a primary cell is controlled by a first base station and a secondary cell is controlled by a second, different base station, flow control is performed between the primary cell and the secondary cell for data for a radio link control layer. According to the flow control, the data for the radio link control layer is communicated between the first and second base stations using a link between the first and second base stations. Flow control may be performed between the primary cell and the secondary cell by dynamically controlling a depth of queued radio link control data in the secondary cell for one or more UEs based on one or more factors, e.g., current/future loading of secondary cell, peak theoretical throughput for a UE in the secondary cell, and/or a UE's current channel quality information. Apparatus, methods, and computer program products are disclosed.

Inter-eNB Carrier Aggregation

Inter-eNB carrier aggregation

A method for paging a mobile station where the mobile station (-) may be in a dormant state is described. The method begins by sending a first paging message () in a first zone () of a given area to a selected mobile station wherein the first paging message is sent at the beginning of a paging interval (). A base station (-) then receives a response to the paging message when the mobile station is in the first zone. When the response to the first paging message is not received, a second paging message () is sent in a second zone () of the given area. The second paging message is sent at a first offset () from the sending of the first paging message wherein this first offset occurs less than one paging interval after the sending of the first page message.

Method for effective fast re-paging in a wireless communication network

A method and apparatus for that provides a re-entry procedure following a radio frequency outage in a wireless communication network is disclosed. The method includes providing () a entity identification for a base station (-) or a paging controller () to a mobile station () during initial entry of the mobile station to a wireless communication network. The method also includes storing () mobile station context information at an entity corresponding to the entity identification. After a radio frequency outage occurs after the initial entry of the mobile station into the network, a notification is sent () that indicates that the mobile station is re-entering the wireless communication network. Based on the notification that there has been a radio frequency outage, the mobile station context information is obtained () to assist the mobile station to re-enter the wireless communication network.

Method for re-entry into a communication network after radio frequency outage

A method is described for providing Hybrid Automatic Repeat Request (HARQ) transmission feedback to a higher layer protocol in a communication system. The method includes a step of detecting HARQ retransmissions in a first layer protocol. This can be used to determine a HARQ failure or an HARQ ACK after a delay of some retransmissions. A next step includes providing feedback information about the detecting step from the first layer protocol to a higher layer protocol. A next step includes instituting corrections at the higher layer protocol, in response to the information transferred from the first layer protocol. These corrections can include immediate retransmission of those bursts of a HARQ failure, or correcting timers to match the delay of eventually ACK'ed data.

HARQ transmission feedback for higher layer protocols in a communication system

A data packet transmission monitor () monitors the transmission of data packets in a given wireless communication system to determine () a predetermined condition. In response to determining the predetermined condition, the transceiver () for the base station () automatically sends () a signal to one or more wireless communication units () to cause the units () to make neighbor cell measurements. Optionally, the base station () sends such a signal when no data packets are to be sent by the base station (). In another embodiment, the data packet transmission monitor () tracks () the transmission of data packets and determines () whether the transmissions allow for a certain number of neighbor cell measurements. If a certain number of neighbor cell measurements are not allowed, a signal is automatically sent () to the wireless communication unit () to make one or more neighbor cell measurements.

Method and apparatus for efficient neighbor cell measurement

An Integrated Digital Enhanced Network system () includes a base radio () interconnected to a plurality of transcoders () located at central offices (). The base radio () time division multiplexes voice packets from the plurality of transcoders () into a time division multiplexed signal frame (). Each signal frame () includes a plurality of sequential frames (). Each sequential frame () includes a predetermined number of slots () based upon a channel interleave. Each of the slots () includes a slot descriptor block (), and a plurality of subslots (e.g.,). The slot descriptor block () alternatively contains overhead information for the plurality of subslots (e.g.,). The subscriber device () demultiplexes each sequential frame () and receives a specific slot () and a specific subslot of the specific slot based upon an assigned slot offset. The subscriber device () executes a handover process () for determining a timing for jumping to a time division signal frame () generated by a new base radio.

Method and apparatus sharing a slot descriptor block between multiple users

A time division multiple access communication system is provided having multiple sub-channels according to known quadrature amplitude modulation techniques. Each sub-channel has a pre-determined time duration and is divided by a pre-determined number of symbol position time divisions. The symbol positions carry sync, pilot and data symbols. Color code information is incorporated into the sync and pilot symbols. The QAM constellation value of the sync symbol is mapped to a color code value. In addition, the sync symbol carries a color code extension which enlarges the color code space.

Digital communication system having improved color code capability

A radio communication system assigns use of a radio frequency communication resource comprising multiple communication channels in a way that minimizes the likelihood that a weakly received signal will be interfered with by a strongly received signal in an adjacent communication channel. The communication system determines a signal strength of a signal received from a user of the communication resource and, based on the signal strength determination, assigns the user one or more of the communication channels that are then available.

Method and apparatus for assigning use of a radio frequency communication resource

The present invention addresses the need for an apparatus and method for providing a communication service to a communication unit ( ) with acceptable audio quality, when a serving site ( ) does not have sufficient resources. To obtain the required communication resources, base sites ( ) whose wireless coverage areas overlap the serving base site are considered. Before selecting an alternate base site to provide the communication service, the present invention, in contrast to the prior art, determines whether the alternate base site is capable of providing the communication service to the communication unit with an acceptable level of quality. If it is, the alternate base site is selected to provide the communication service to the communication unit.

Method and apparatus for providing a communication service to a communication unit in a wireless communication system with overlapping coverage areas

The present invention provides a method and apparatus for performing neighbor site measurements that address the need to reduce data transfer delays while performing such measurements. In the present invention, the signal quality of the serving site (108) of a communication unit (102) is used to determine the neighbor site measurement characteristics for the communication unit (102). Serving site signal quality is used as an indicator of the critical or non-critical need for neighbor site measurements. Thus, data transfer delays can be reduced by delaying serving site communication only when the serving site signal quality indicates a critical need for neighbor site measurements.

Communication unit and method for performing neighbor site measurements in a communication system

The present invention provides a method for improving the communication coverage in a multi-cell communication system (,) which employs neighbor cell lists. A cell site (,) provides a communication unit (,) within its cell (,) with communication and a neighbor cell list. The neighbor cell list (,) informs the communication unit of other cells which are possible hand-off targets. When the fixed network equipment (FNE) detects that a particular communication unit (,) has entered another cell and/or needs to hand-off its communication to another cell site but has been denied, the cell site (,) sends the communication unit the neighbor cell list related to the new cell. With a new neighbor cell list (,), the communication unit (,) can now attempt to maintain its communication by handing-off to cells unknown before. In this manner the effective communication coverage of the system is improved.

Method for improving communication coverage in multi-cell communication systems

The present invention provides a method for improving the communication coverage in a multi-cell communication system (100) which employs neighbor cell lists. A cell site (114) provides a communication unit (128) within its cell (112) with communication and a neighbor cell list. The neighbor cell list (200) informs the communication unit of other cells which are possible hand-off targets. When the fixed network equipment (FNE) detects that a particular communication unit (128) has entered another cell and/or needs to hand-off its communication to another cell site but has been denied, the cell site (114) sends the communication unit the neighbor cell list related to the new cell. With a new neighbor cell list (300), the communication unit (128) can now attempt to maintain its communication by handing-off to cells unknown before. In this manner the effective communication coverage of the system is improved.

Growing community of inventors

Elmhurst, IL, United States of America

Mark J Marsan