Techniques and apparatus for hybrid automatic retransmission request (HARQ) acknowledgement (ACK) bundling in half duplex frequency division duplexing (HD-FDD) systems are provided. One technique includes determining ACK parameter(s) to be used for acknowledging a bundled transmission that includes instance(s) of a channel across subframe(s). An indication of the ACK parameter(s) is signaled to a user equipment (UE). The ACK parameter(s) include a first ACK parameter that conveys a size of the bundled transmission and a second ACK parameter that conveys an amount of time for the UE to delay acknowledging a data transmission in an instance of the channel after receiving the data transmission. The UE may acknowledge the bundled transmission in accordance with the ACK parameter(s).

A request to establish a bi-directional full-duplex network connection is received. The request conforms to a half-duplex network connection protocol and the half-duplex connection protocol is a HTTP based protocol. The request is processed to determine a decision on whether to allow the bi-directional full-duplex connection. In the event the decision is to allow the bi-directional full-duplex connection, the bi-directional full-duplex network connection is established using the half-duplex network connection protocol. The bi-directional full-duplex connection utilizes a WebSocket communication protocol. Establishing the bi-directional full-duplex connection utilizes a plurality of half duplex connections. A confirmation that the bi-directional full-duplex network connection has been established is provided.

A request to establish a bi-directional full-duplex network connection is received. The request conforms to a half-duplex network connection protocol and the half-duplex connection protocol is a HTTP based protocol. The request is processed to determine a decision on whether to allow the bi-directional full-duplex connection. In the event the decision is to allow the bi-directional full-duplex connection, the bi-directional full-duplex network connection is established using the half-duplex network connection protocol. The bi-directional full-duplex connection utilizes a WebSocket communication protocol. Establishing the bi-directional full-duplex connection utilizes a plurality of half duplex connections. A confirmation that the bi-directional full-duplex network connection has been established is provided.

Embodiments of the present invention provide an information transmission method, including: determining, by a user equipment (UE), a first subframe; configuring the UE to send a first uplink signal in the first subframe; determining, by the UE, that the first uplink signal is a first type of uplink signal, where the first type of uplink signal occupies a first part of symbols of the first subframe, and the number of symbols included in the first part of symbols is less than the number of symbols included in the first subframe; and detecting, by the UE, a downlink control channel on a second part of symbols in the first subframe, where the first part of symbols and the second part of symbols do not overlap in time domain.

A wireless communication system comprises a source node, a destination node, and a plurality of half-duplex relay nodes disposed between the source node and the destination node. The half-duplex relay nodes are configured in two disjoint paths each comprising an equal number of hops from the source node to the destination node. The source node is configured to alternately transmit information via the two disjoint paths in alternating time slots, and the destination node is configured to alternately receive information via the two disjoint paths in alternating time slots.

A wireless communication system comprises a source node, a destination node, and a plurality of half-duplex relay nodes disposed between the source node and the destination node. The half-duplex relay nodes are configured in two disjoint paths each comprising an equal number of hops from the source node to the destination node. The source node is configured to alternately transmit information via the two disjoint paths in alternating time slots, and the destination node is configured to alternately receive information via the two disjoint paths in alternating time slots.

The present invention provides an uplink signal transmission/receiving method and an apparatus therefor, and a downlink signal transmission/receiving method and an apparatus therefor. In a half duplex frequency division duplex (HD-FDD), when uplink transmission and downlink receipt are performed on the same subframe or neighboring subframes, a user equipment drops one of the uplink transmission and the downlink receipt according to a priority, and performs only transmission which is not dropped. The priority includes periodically unavailable resources, that is, aperiodic resources, taking priority over periodically available resources. If the uplink transmission is periodic, for example assigned in a semi-static manner or in a semi-persistent manner, and a downlink transmission is aperiodic, for example assigned dynamically, the user equipment drops the uplink transmission and performs the downlink receipt.

A method is disclosed for PHICH resource allocation in a wireless communication system that supports flexible TDD UL-DL configuration and in which different TDD UL-DL configurations are available and the TDD UL-DL configuration used by first UEs which operate according to the flexible TDD configuration can be different to the TDD UL-DL configuration used by second UEs which operate according to a long term TDD UL-DL configuration. The method comprising allocating a PHICH resource for both first UEs and second UEs according to LTE timing rules applicable to the TDD UL-DL configuration in use by second UEs.

A method is disclosed for PHICH resource allocation in a wireless communication system that supports flexible TDD UL-DL configuration and in which different TDD UL-DL configurations are available and the TDD UL-DL configuration used by first UEs which operate according to the flexible TDD configuration can be different to the TDD UL-DL configuration used by second UEs which operate according to a long term TDD UL-DL configuration. The method comprising allocating a PHICH resource for both first UEs and second UEs according to LTE timing rules applicable to the TDD UL-DL configuration in use by second UEs.

An automotive communication system includes multiple communication devices and a processor. The communication devices are configured to be installed in a vehicle and to communicate with one another over point-to-point Ethernet links. In each Ethernet link, a first communication device serves as a link master that is configured to set a clock signal for the link, and a second communication device serves as a slave that is configured to synchronize to the clock signal set by the first communication device. The communication devices are configured to receive data from sensors and to transmit the data over the Ethernet links. The processor is configured to receive the data from the communication devices over the Ethernet links, to synchronize the data originating from the multiple sensors to a common time-base based on link-specific clock-signal synchronization achieved on each of the links by each link master, and to process the synchronized data.