Methods, systems, and devices for wireless communication are described. A network access device may select a search space configuration for transmission of group(s) of one or more control channel elements (CCEs) to convey a downlink control information (DCI) message. The search space configuration may include a cross-coreset configuration, such as a cross-control channel subband configuration, a cross-symbol configuration, and/or a cross-beam configuration. The network access device may transmit the DCI message according to the selected search space configuration. A user equipment (UE) may monitor, based on the search space configuration, the group(s) of one or more CCEs to detect DCI messages. The UE may detect a DCI message for it and decode the DCI message based on the monitoring. Numerous other aspects are provided.

Search space design and use

This application provides a downlink control information (DCI) obtaining method and apparatus. The method includes: determining, by a terminal, predefined search space based on aggregation levels supported by the terminal, where the predefined search space includes search space corresponding to at least one of an aggregation level 16 and an aggregation level 24; and performing, blind detection to obtain the DCI. Alternatively, the method includes: determining, by a terminal, blind detection search space of the terminal from predefined search space based on a quantity of resource blocks (RBs) occupied by an enhanced physical downlink control channel (EPDCCH) and aggregation levels supported by the terminal, where the predefined search space includes corresponding search space obtained when the RB quantity is 16; and performing, blind detection to obtain the DCI. According to this application, a downlink coverage gain can be increased, and diversity of implementations of downlink coverage enhancement can be improved.

Downlink control information processing method and apparatus

The application provides a method for transmitting control information, which is executed in a communication system which uses at least two partitioning modes to partition time-frequency resources fortransmitting the control information. A plurality of time-frequency resource blocks partitioned in at least two partitioning modes are of a nested structure. The method comprises the steps of: from aplurality of time-frequency resource blocks, determining a first time-frequency resource block for sending first control information; partitioning the first control information into m information fragments; according to the m information fragments, generating m pieces of to-be-sent information, wherein each to-be-sent information comprises the corresponding information fragment, to-be-sent information i comprises an information fragment i and a check sequence i, the check sequence i is generated according to the information fragment i, and i is an element of a set [1,m]; carrying out polar code encoding on the m to-be-sent information to generate a symbol sequence; and by the first time-frequency resource block, sending the symbol sequence. Resource cost of transmitting the control information can be reduced, and blink detection calculation complexity and processing delay are reduced.

Method and device for transmitting control information

Disclosed in embodiments of the present invention are a data transmission method, a terminal device, and a network device. The method comprises: a terminal device receives first instruction information from a network device, the first instruction information being used for instructing to enable an uplink resource randomization rule corresponding to the terminal device, the uplink resource randomization rule being a rule specific for the terminal device, and the uplink resource randomization rule comprising a randomization rule of a demodulation reference signal (DMRS) sequence used by the terminal device; the terminal device determines, according to the first instruction information, a first uplink resource for transmitting uplink data; the terminal device transmits uplink data using the first uplink resource. The embodiments of the present invention facilitate implementing the demodulation of uplink data from a terminal device by a network device, thereby reducing the channel estimation error and improving the reliability and flexibility of data transmission. The method provided in the embodiments can be applied to communication systems, such as V2X, LTE-V, V2V, Internet of Vehicles, MTC, Internet of Things (IoT), LTE-M, and M2M.

Data transmission method, terminal device, and network device

The invention provides a transmitting method and a receiving method of a physical downlink control channel and a related device. The transmitting method comprises the following steps of: determining an aggregation level of the physical downlink control channel; Selecting a target pattern from at least two search space patterns corresponding to the aggregation level, wherein the first resource setcorresponding to each search space pattern is a subset of the second resource set corresponding to the aggregation level of the maximum value, and there are at least two physical downlink control channel candidate spaces of exclusive resources in all the physical downlink control channel candidate spaces included in any two search space patterns; transmitting the physical downlink control channelby using a search space corresponding to the target pattern. The transmitting method of the physical downlink control channel provided by the invention can increase the number of user equipments thatcan be scheduled by the physical downlink control channel and improve the utilization rate of resources of the physical downlink control channel.

A transmitting method and a receiving method of a physical downlink control channel and a related device

The invention discloses a physical downlink control channel (PDCCH) resource allocation method and a device. The method comprises steps: relative positions of UE (User Equipment) in at least two adjacent cells are judged; as for every piece of UE, a CCE (Control Channel Element) aggregation level of the PDCCH of the UE is determined, and according to the CCE aggregation level of the PDCCH of the UE, special UE search space in the PDCCH of each subframe is calculated; when at least two pieces of UE are judged to be located in an overlapped covering region of the adjacent cells and the at least two pieces of UE belong to adjacent different cells, as for each piece of UE in the at least two pieces of UE, according to the CCE aggregation level of the PDCCH of the current UE, a group of CCEs which do not overlap with CCEs in PDCCHs of other pieces of UE in the at least two pieces of UE in the frequency domain position are selected and allocated from the special UE search space in the PDCCH of each subframe, and the group of CCE is allocated to the PDCCH of the current UE. The method and the device of the invention realize improvement of transmission reliability of the PDCCH.

Physical downlink control channel (PDCCH) resource allocation method and device

The present application discloses a method and a device of resource allocation in Physical Downlink Control Channels (PDCCHs). The present application successfully improves the reliability of the transmission in PDCCH.

Method and device of resource allocation in physical downlink control channels

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Physical downlink control channel (PDCCH) resource allocation method and device

Method and device of resource allocation in physical downlink control channels