Multi-carrier scheduling and search space activation

Abstract

Certain aspects of the present disclosure provide techniques for multi-carrier scheduling and search space activation.

Description

[0001] Claim of priority under 35 USC § 119

[0002] This application claims priority to U.S. application serial number 16 / 517,221, filed on July 19, 2019, which claims priority to and the benefit of U.S. Provisional Patent Application Serial Number 62 / 701,415, filed on July 20, 2018, both of which are assigned to the present assignee and are hereby expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for conveying commands or allocation information for multiple component carriers (CCs). Background Art

[0004] Wireless communication systems are widely used to provide various telecommunication services, such as telephony, video, data, messaging, broadcast, etc. These wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access systems include the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) system, the LTE Advanced (LTE-A) system, the Code Division Multiple Access (CDMA) system, the Time Division Multiple Access (TDMA) system, the Frequency Division Multiple Access (FDMA) system, the Orthogonal Frequency Division Multiple Access (OFDMA) system, the Single Carrier Frequency Division Multiple Access (SC FDMA) system, and the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, etc.

[0005] In some examples, a wireless multiple access communication system may include multiple base stations (BSs), each of which is capable of simultaneously supporting communications for multiple communication devices, which are also referred to as user equipment (UE). In an LTE or LTE-A network, a set of one or more base stations may define an eNodeB (eNB). In other examples (e.g., in a next generation, new radio (NR) or 5G network), a wireless multiple access communication system may include multiple distributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmission reception points (TRPs), etc.), which communicate with several central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), wherein a set of one or more distributed units communicating with a central unit may define an access node (e.g., the access node may be referred to as a base station, a 5G NB, a next generation NodeB (gNB or gNodeB), a TRP, etc.). A base station or distributed unit may communicate with a set of UEs on downlink channels (eg, for transmissions from the base station to the UEs) and uplink channels (eg, for transmissions from the UEs to the base station or distributed unit).

[0006] These multiple access technologies have been used in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, or even global level. New Radio (NR) (e.g., 5G) is an example of an emerging telecommunication standard. NR is a collection of enhancements to the LTE mobile standard promulgated by 3GPP. It is designed to better support mobile broadband Internet access by using OFDMA with a cyclic prefix (CP) on the downlink (DL) and uplink (UL) to improve spectrum efficiency, reduce costs, improve services, use new spectrum, and better integrate with other open standards. To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0007] However, as the demand for mobile broadband access continues to increase, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies. Summary of the invention

[0008] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed in the appended claims, certain features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled "Detailed Description of the Invention," it will be understood how the features of the present disclosure provide advantages including the following: Improved communication between access points and stations in a wireless network.

[0009] Certain aspects provide a method for wireless communication by a user equipment (UE). The method generally includes: receiving downlink control information (DCI) having one or more fields for conveying command or allocation information for multiple component carriers (CCs); and taking at least one action related to the multiple CCs based on the command or allocation information.

[0010] Certain aspects provide a method for wireless communication by a network entity. The method generally includes: generating downlink control information (DCI) having one or more fields for conveying command or allocation information for multiple component carriers (CCs); and sending the DCI to a user equipment (UE) to configure the UE to communicate in the multiple CCs according to the command or allocation information.

[0011] Certain aspects of the present disclosure also provide various apparatuses, components, and computer-readable media configured to perform (or cause a processor to perform) the operations described herein.

[0012] To accomplish the foregoing and related ends, one or more aspects include features fully described below and particularly pointed out in the claims. The following description and drawings illustrate in detail certain illustrative features of one or more aspects. However, these features are only indicative of a few of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Therefore, in order that the manner in which the features of the present disclosure set out above may be understood in detail, a more particular description of what has been briefly summarized above may be made with reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the appended drawings illustrate only certain typical aspects of the present disclosure and, therefore, should not be considered limiting of the scope of the present disclosure, as the description may allow other equally effective aspects.

[0014] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0015] Figure 2 is a block diagram illustrating an example logical architecture of a distributed radio access network (RAN) in accordance with certain aspects of the present disclosure.

[0016] Figure 3 is a diagram illustrating an example physical architecture of a distributed RAN in accordance with certain aspects of the present disclosure.

[0017] Figure 4 is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0018] Figure 5 is a block diagram illustrating an example for implementing a communication protocol stack in accordance with certain aspects of the present disclosure.

[0019] Figure 6 An example of a frame format for a New Radio (NR) system is illustrated in accordance with certain aspects of the present disclosure.

[0020] Figure 7 An example of dynamic resource collection activation in accordance with certain aspects of the present disclosure is illustrated.

[0021] Figure 8 Example operations for wireless communications by a user equipment are illustrated in accordance with certain aspects of the present disclosure.

[0022] Fig. 9 Example operations for wireless communications by a network entity are illustrated in accordance with certain aspects of the present disclosure.

[0023] Fig.10 An example downlink control information (DCI) format is illustrated in accordance with certain aspects of the present disclosure.

[0024] Figure 11-Figure 14 Examples of scheduling and search space activation of multiple component carriers (CCs) in accordance with certain aspects of the present disclosure are illustrated.

[0025] To facilitate understanding, identical reference numerals have been used, where possible, to designate elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation. DETAILED DESCRIPTION

[0026] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for communicating commands or allocation information for multiple component carriers (CCs).

[0027] The following description provides examples, but is not intended to limit the scope, applicability, or examples set forth in the claims. The functions and arrangements of the elements discussed may be changed without departing from the scope of the present disclosure. Various examples may omit, replace, or add various programs or components as appropriate. For example, the described method may be performed in an order different from the order described, and individual steps may be added, omitted, or combined. Similarly, the features described with respect to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the disclosure is intended to cover devices or methods practiced using other structures, functionality, or structures and functionality as an addition to the various aspects of the disclosure set forth herein or in addition to the various aspects of the disclosure set forth herein. It should be understood that any aspect of the present disclosure may be embodied by one or more elements in the claims. The word "exemplary" is used herein to mean "as an example, instance, or illustration". Any aspect described as "exemplary" herein is not necessarily to be interpreted as being more preferred or advantageous than other aspects.

[0028] The technology described herein can be used for various wireless communication technologies, such as LTE, CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other networks. The terms "network" and "system" are generally used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000. UTRA includes other variants of Wideband CDMA (WCDMA) and CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA network can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA. UTRA and E-UTRA are parts of Universal Mobile Telecommunications System (UMTS).

[0029] New Radio (NR) is an emerging wireless communication technology developed together with the 5G Technology Forum (5GTF). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are UMTS versions using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). Cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The technology described herein can be used for the wireless networks and radio technologies mentioned above and other wireless networks and radio technologies. For clarity, although terms commonly associated with 3G and / or 4G wireless technologies may be used herein to describe aspects, aspects of the present disclosure may be applied to communication systems based on other generations, such as 5G and subsequent generations, including NR technology.

[0030] New Radio (NR) access (e.g., 5G technology) can support various wireless communication services, such as enhanced mobile broadband (eMBB) for wide bandwidth (e.g., 80 MHz or higher), millimeter wave (mmW) for high carrier frequency (e.g., 25 GHz or higher), massive machine type communication MTC (mMTC) for non-backward compatible MTC technology, and / or mission critical ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe.

[0031] Exemplary Wireless Communication System

[0032] Figure 1 An exemplary wireless communication network 100 is illustrated in which aspects of the present disclosure may be performed.For example, a base station 120 may send a DCI with command or allocation information for multiple component carriers (CCs) to configure one or more UEs 120 to communicate in the multiple CCs.

[0033] The wireless communication network 100 may be a New Radio (NR) or 5G network. Figure 1As illustrated, the wireless network 100 may include multiple base stations (BS) 110 and other network entities. A BS may be a station that communicates with a user equipment (UE). Each BS 110 may provide communication coverage to a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a Node B (NB) and / or a Node B subsystem serving this coverage area, depending on the context in which the term "cell" is used. In the NR system, the term "cell" and the next generation NodeB (gNB), new radio base station (NR BS), 5G NB, access point (AP) or transmission reception point (TRP) may be interchangeable. In some examples, a cell may not necessarily be fixed, and the geographic area of ​​a cell may move according to the location of a mobile BS. In some examples, a base station may be interconnected to each other and / or to one or more other base stations or network nodes (not shown) in the wireless communication network 100 through various types of backhaul interfaces of the following: such as direct physical connections, wireless connections, virtual networks, or similar items using any suitable transmission network.

[0034] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific radio access technology (RAT) and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, subcarrier, frequency channel, tone, subband, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0035] A base station (BS) may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access to UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs for users in the home, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1In the example shown, BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more (e.g., three) cells.

[0036] The wireless communication network 100 may also include a relay station. A relay station is a station that receives transmissions of data and / or other information from an upstream station (e.g., a BS or UE) and sends transmissions of data and / or other information to a downstream station (e.g., a UE or BS). A relay station may also be a UE that relays transmissions for other UEs. Figure 1 In the example shown, a relay station 110r may communicate with a BS 110a and a UE 120r to facilitate communication between the BS 110a and the UE 120r. A relay station may also be referred to as a relay BS, a relay, or the like.

[0037] The wireless network 100 may be a heterogeneous network including different types of BSs, such as macro BSs, pico BSs, femto BSs, repeaters, etc. These different types of BSs may have different transmission power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmission power level (e.g., 20 watts), while a pico BS, a femto BS, and a repeater may have a lower transmission power level (e.g., 1 watt).

[0038] The wireless communication network 100 may support synchronous operation or asynchronous operation. For synchronous operation, the BSs may have similar frame timing, and transmissions from different BSs may be roughly aligned in time. For asynchronous operation, the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time. The techniques described herein may be used for both synchronous and asynchronous operation.

[0039] A network controller 120 may couple to a set of BSs and provide coordination and control for these BSs.

[0040] Network controller 130 may communicate with BS 110 via a backhaul. BS 110 may also communicate with each other (eg, directly or indirectly) via a wireless or wired backhaul.

[0041] UE 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless network 100, and each UE may be fixed or mobile. UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smart phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable device such as smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.), entertainment device (e.g., music device, video device, satellite radio, etc.), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via wireless or wired medium. Some UEs may be considered as machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc. that can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node can provide, for example, connectivity for or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs can be considered Internet of Things (IoT) devices, which can be narrowband IoT (NB-IoT) devices.

[0042] Some wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as frequency modulation, frequency slots (bins), etc. Each subcarrier can be modulated with data. Typically, modulation symbols are sent in the frequency domain using OFDM and in the time domain using SC-FDM. The spacing between adjacent subcarriers can be fixed, while the total number of subcarriers (K) can depend on the system bandwidth. For example, the spacing of the subcarriers can be 15kHz, and the minimum resource allocation (referred to as a "resource block" (RB)) can be 12 subcarriers (or 180kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal fast Fourier transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (ie, 6 resource blocks), so that for a system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz, there may be 1, 2, 4, 8 or 16 subbands, respectively.

[0043] Although aspects of the examples described herein may be associated with LTE technology, aspects of the present disclosure may be applicable to other wireless communication systems, such as NR. NR may utilize OFDM with CP on both the uplink and downlink and include support for half-duplex operation using TDD. Beamforming may be supported and the beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported. The MIMO configuration in the DL may support up to 8 transmit antennas with multi-layer DL transmissions of up to 8 streams and up to 2 streams per UE. Multi-layer transmissions of up to 2 streams per UE may be supported. Aggregation of multiple cells with up to 8 serving cells may be supported.

[0044] In some examples, access to the air interface can be scheduled, where a scheduling entity (e.g., a base station) allocates resources for communicating between some or all devices and equipment within its service area or cell. The scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, the subordinate entity utilizes resources allocated by the scheduling entity. The base station is not the only entity that can be used as a scheduling entity. In some examples, a UE may be used as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs may utilize resources scheduled by the UE for wireless communications. In some examples, a UE may be used as a scheduling entity in a peer-to-peer (P2P) network and / or a mesh network. In a mesh network example, in addition to communicating with a scheduling entity, UEs may also communicate directly with each other.

[0045] exist Figure 1 In FIG. 1 , a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designed to serve the UE on a downlink and / or uplink. A thin dashed line with double arrows indicates interfering transmissions between a UE and a BS.

[0046] Figure 2 An example logical architecture of a distributed radio access network (RAN) 200 is illustrated in FIG. Figure 1 The distributed radio access network 200 is implemented in the illustrated wireless communication network 100. The 5G access node 206 may include an access node controller (ANC) 202. The ANC 202 may be a central unit (CU) of the distributed RAN 200. The backhaul interface to the next generation core network (NG-CN) 204 may terminate at the ANC 202. The backhaul interface to the adjacent next generation access node (NG-AN) 210 may terminate at the ANC 202. The ANC 202 may include one or more transmission reception points (TRPs) 208 (e.g., cells, BSs, gBSs, etc.).

[0047] The TRP 208 may be a distributed unit (DU). The TRP 208 may be connected to a single ANC (e.g., ANC 202) or more than one ANC (not shown). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific AND deployments, the TRP 208 may be connected to more than one ANC. The TRPs 208 may each include one or more antenna ports. The TRP 208 may be configured to serve traffic for the UE individually (e.g., dynamically selected) or jointly (e.g., jointly transmitted).

[0048] The logical architecture of the distributed RAN 200 may support fronthaul solutions across different deployment types. For example, the logical architecture may be based on the transmitting network capabilities (eg, bandwidth, latency, and / or jitter).

[0049] The logical architecture of the distributed RAN 200 may share features and / or components with LTE. For example, the next generation access node (NG-AN) 210 may support dual connectivity with NR and may share a common fronthaul for LTE and NR.

[0050] The logical architecture of the distributed RAN 200 may allow for collaboration between and within TRPs 208, such as collaboration within a TRP and / or collaboration across TRPs via the ANC 202. An inter-TRP interface may not be used.

[0051] Logical functions can be dynamically distributed in the logical architecture of the distributed RAN 200. Figure 5 Described in more detail, the radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer may be appropriately placed at the DU (e.g., TRP 208) or the CU (e.g., ANC 202).

[0052] Figure 3 An example physical architecture of a distributed radio access network (RAN) 300 according to aspects of the present disclosure is illustrated. A centralized core network unit (C-CU) 302 may host core network functions. The C-CU 302 may be centrally deployed. To handle peak capacity, the C-CU 302 functionality may be offloaded (e.g., to Advanced Wireless Services (AWS)).

[0053] A centralized RAN unit (C-RU) 304 may host one or more ANC functions. Alternatively, the C-RU 304 may host core network functions locally. The C-RU 304 may have a distributed deployment. The C-RU 304 may be close to the network edge.

[0054] The DU 306 may host one or more TRPs (edge ​​node (EN), edge unit (EU), radio head (RH), smart radio head (SRH), etc.) The DU may be located at the edge of the network with radio frequency (RF) functionality.

[0055] Figure 4 1 and 120 (eg, Figure 1For example, antenna 452, processors 466, 458, 464, and / or controller / processor 480 of UE 120, and / or antenna 434, processors 420, 430, 438, and / or controller / processor 440 of BS 110 may be used to perform the various techniques and methods described herein.

[0056] At BS 110, a transmit processor 420 may receive data from a data source 412 and control information from a controller / processor 440. The control information may be for the following: a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. The processor 420 may process (e.g., encode and symbol map) the data and the control information to obtain data symbols and control symbols, respectively. The processor 420 may also generate reference symbols, such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell-specific reference signal (CRS), etc. The transmit (TX) multiple-input multiple-output (MIMO) processor 430 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols, where applicable, and may provide output symbol streams to modulators (MODs) 432a to 432t. Each modulator 432 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 432a to 432t may be transmitted via antennas 434a to 434t, respectively.

[0057] At the UE 120, antennas 452a to 452r can receive downlink signals from the base station 110 and can provide the received signals to demodulators (DEMODs) 454a to 454r in the transceiver, respectively. Each demodulator 454 can condition (e.g., filter, amplify, downconvert, and digitize) the corresponding received signal to obtain input samples. Each demodulator can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 456 can obtain received symbols from all demodulators 454a to 454r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. The receive processor 458 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 460, and provide decoded control information to the controller / processor 480.

[0058] On the uplink, at the UE 120, a transmit processor 464 may receive and process data from a data source 462 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 480 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 464 may also generate reference symbols for reference signals (e.g., for a sounding reference signal (SRS)). The symbols from the transmit processor 464 may be precoded by a TX MIMO processor 466, if applicable, further processed by demodulators 454a through 454r in the transceiver (e.g., for SC-FDM, etc.), and transmitted to the base station 110. At the BS 110, the uplink signals from the UE 120 may be received by the antenna 434, processed by the modulator 432, detected by the MIMO detector 436, if applicable, and further processed by the receive processor 438 to obtain decoded data and control information transmitted by the UE 120. The receive processor 438 may provide decoded data to a data sink 439 and decoded control information to a controller / processor 440 .

[0059] Controllers / processors 440 and 480 may direct the operation at base station 110 and UE 120, respectively. Processor 440 and / or other processors and modules at BS 110 may perform or direct the execution of processes for the techniques described herein. Memories 442 and 482 may store data and program codes for BS 110 and UE 120, respectively. Scheduler 444 may schedule UEs for data transmission on the downlink and / or uplink.

[0060] Figure 5A block diagram 500 illustrating an example for implementing a communication protocol stack according to aspects of the present disclosure is illustrated. The illustrated communication protocol stack may be implemented by a device operating in a wireless communication system such as a 5G system (e.g., a system supporting uplink-based mobility). Diagram 500 illustrates a communication protocol stack, which includes a radio resource control (RRC) layer 510, a packet data convergence protocol (PDCP) layer 515, a radio link control (RLC) layer 520, a medium access control (MAC) layer 525, and a physical (PHY) layer 530. In various examples, the layers of the protocol stack may be implemented as separate modules of software, as part of a processor or ASIC, as part of a non-colocated device connected by a communication link, or various combinations thereof. Co-located and non-co-located implementations may be used, for example, in a protocol stack for a network access device (e.g., AN, CU, and / or DU) or a UE.

[0061] The first option 505-a illustrates a split implementation of the protocol stack, where the implementation of the protocol stack is performed on a centralized network access device (e.g., Figure 2 ANC 202 in the system) and distributed network access equipment (e.g., Figure 2 In the first option 505-a, the RRC layer 510 and the PDCP layer 515 may be implemented by a central unit, while the RLC layer 520, the MAC layer 525, and the PHY layer 530 may be implemented by the DU. In various examples, the CU and the DU may be co-located or non-co-located. The first option 505-a may be useful in macro cell, micro cell, or pico cell deployments.

[0062] The second option 505-b shows a unified implementation of the protocol stack, where the protocol stack is implemented in a single network access device. In the second option, the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530 can all be implemented by the AN. The second option 505-b can be useful in, for example, a femtocell deployment.

[0063] Regardless of whether the network access device implements part or all of the protocol stack, the UE can implement the entire protocol stack as shown in 505-c (e.g., RRC layer 510, PDCP layer 515, RLC layer 520, MAC layer 525 and PHY layer 530).

[0064] In LTE, the basic transmission time interval (TTI) or packet duration is a 1ms subframe. In NR, the subframe is still 1ms, but the basic TTI is called a time slot. A subframe contains a variable number of time slots (e.g., 1, 2, 4, 8, 16... time slots) depending on the subcarrier spacing. NR RBs are 12 consecutive frequency subcarriers. NR can support a basic subcarrier spacing of 15KHz, and other subcarrier spacings such as 30kHz, 60kHz, 120kHz, 240kHz, etc. can be defined relative to the basic subcarrier spacing. The symbol and time slot lengths are proportional to the subcarrier spacing. The CP length also depends on the subcarrier spacing.

[0065] Figure 6 600 for NR. The transmission timeline for each of the downlink and uplink may be divided into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 ms) and may be divided into 10 subframes, each of which is 1 ms and has an index of 0 to 9. Each subframe may include a variable number of slots depending on the subcarrier spacing. Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols) depending on the subcarrier spacing. The symbol periods in each slot may be assigned an index. A mini-slot, which may be referred to as a subslot structure, refers to a transmission time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols).

[0066] Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible direction) for data transmission, and the link direction for each subframe may be switched dynamically. The link direction may be based on the slot format. Each slot may include DL / UL data and DL / UL control information.

[0067] In NR, a synchronization signal (SS) block is transmitted. The SS block includes PSS, SSS, and two symbols PBCH. Figure 6SS blocks are sent in fixed time slot positions such as symbols 0-3 shown in the figure. PSS and SSS can be used by UE for cell search and acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identification. PBCH carries some basic system information, such as downlink system bandwidth, timing information within radio frames, SS burst set periodicity, system frame number, etc. SS blocks can be organized into SS bursts to support beam sweeping. Further system information such as remaining minimum system information (RMSI), system information block (SIB), other system information (OSI) can be sent on the physical downlink shared channel (PDSCH) in certain subframes. SS blocks can be sent up to sixty-four times, for example, up to sixty-four different beam directions for mmW. Up to sixty-four transmissions of SS blocks are called SS burst sets.

[0068] In some cases, two or more subordinate entities (e.g., UEs) can communicate with each other using side link signals. Real-world applications of such side link communications may include public safety, proximity services, UE-to-network relays, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical networks, and / or various other suitable applications. In general, a side link signal may refer to a signal that is passed from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying this communication through a scheduling entity (e.g., UE or BS), even if the scheduling entity may be used for scheduling and / or control purposes. In some examples, a licensed spectrum (licensed spectrum) (different from a wireless local area network that typically uses an unlicensed spectrum) may be used to transmit a side link signal.

[0069] The UE may operate in various radio resource configurations, including configurations associated with sending a pilot using a dedicated set of resources (e.g., a radio resource control (RRC) dedicated state, etc.), or configurations associated with sending a pilot using a common set of resources (e.g., an RRC common state, etc.). When operating in the RRC dedicated state, the UE may select a dedicated set of resources for sending a pilot signal to the network. When operating in the RRC common state, the UE may select a common set of resources for sending a pilot signal to the network. In either case, the pilot signal sent by the UE may be received by one or more network access devices such as an AN or DU or a portion thereof. Each receiving network access device may be configured to receive and measure the pilot signal sent on the common set of resources, and also receive and measure the pilot signal sent on the dedicated set of resources allocated to the UE when the network access device is a member of the monitoring set of network access devices for the UE. The CU to which the measurement of the pilot signal is sent by one or more of the receiving network access devices, or (one or more) receiving network access devices, may use the measurement to identify the serving cell of the UE, or initiate a change in the serving cell for one or more UEs.

[0070] A control resource set (CORESET) for an OFDMA system (e.g., a communication system that uses an OFDMA waveform to send a PDCCH) may include one or more control resource (e.g., time and frequency resource) sets configured to communicate a PDCCH within a system bandwidth. Within each CORESET, one or more search spaces (e.g., a common search space (CSS), a UE-specific search space (USS), etc.) may be defined for a given UE. According to aspects of the present disclosure, a CORESET is a set of time and frequency domain resources defined in units of resource element groups (REGs). Each REG may include a fixed number (e.g., twelve) of tones in a symbol period (e.g., a symbol period of a time slot), where one tone in one symbol period is referred to as a resource element (RE). A fixed number of REGs may be included in a control channel element (CCE). A CCE set may be used to send a new radio PDCCH (NR-PDCCH), where different numbers of CCEs in a set used to send NR-PDCCH use different aggregation levels. Multiple CCE sets may be defined as a search space for a UE, and thus, a NodeB or other base station may send a NR-PDCCH to a UE by sending the NR-PDCCH in a CCE set defined as a decoding candidate within the search space for the UE, and the UE may receive the NR-PDCCH and decode the NR-PDCCH sent by the NodeB by searching in the search space for the UE.

[0071] Exemplary Scheduling and Search Space Activation of Multiple CCs

[0072] Aspects of the present disclosure provide techniques for communicating commands and / or allocation information for multiple component carriers (CCs). For example, a network entity (e.g., a gNB) may send downlink control information (DCI) for scheduling transmissions for multiple component carriers (CCs) and / or activating search spaces for multiple component carriers (CCs). In some cases, the DCI may carry commands for power adaptation in one or more of the multiple CCs (e.g., commands for a UE to adjust the transmission power of transmissions from the UE in one or more of the multiple CCs).

[0073] In some cases, it may be beneficial to dynamically control what search spaces the UE monitors. For example, for power saving operation of the UE, the BS may dynamically change and indicate the number of search space sets that the UE should monitor for control channel (PDCCH) decoding. Because control channel monitoring is associated with the number of blind decodings, reducing the number of CCs used for control channel monitoring may save baseband processing power for the UE.

[0074] Figure 7 An example of dynamic search space control according to certain aspects of the present disclosure is illustrated. In the illustrated example, a primary component carrier (PCC) may contain an anchor search space set, while a secondary component carrier (SCC) contains a non-anchor search space set. In some cases, the Scell ​​search space set may be activated via MAC-CE, but initially, the SCell contains only an inactive search space set.

[0075] As an alternative to activation via MAC-CE, DCI signaling may be preferred as a method of delivering search space set activation commands due to shorter latency.Aspects of the present disclosure provide a format for DCI that may allow, for example, for conveying commands or allocation information for multi-carrier scheduling and search space activation.

[0076] Figure 8 Example operations 800 for wireless communications by a UE are illustrated in accordance with aspects of the present disclosure. Operations 800 may be performed, for example, by Figure 1 The UE 120 is executed to receive an ongoing DCI from a base station, the DCI conveying a command or allocation information for communicating in multiple CCs.

[0077] According to aspects, a UE may include: Figure 4 One or more components illustrated may be configured to perform the operations described herein. Figure 4The exemplary antenna 452, demodulator / modulator 454, controller / processor 480 and / or memory 482 may perform Figure 8 Operation 800.

[0078] Operations 800 begin at 802 by receiving downlink control information (DCI) having one or more fields for activating search spaces in a plurality of component carriers (CCs). At 804, the UE monitors the search spaces in the plurality of CCs for control channel transmissions.

[0079] Fig. 9 Example operations 900 for wireless communications by a network entity (e.g., a base station / gNB) according to aspects of the present disclosure are illustrated. Operations 900 may be performed, for example, by Figure 1 The base station 110 is executed to configure the UE 120 to communicate in multiple CCs.

[0080] According to aspects, a BS may include: Figure 4 One or more components illustrated may be configured to perform the operations described herein. Figure 4 The exemplary antenna 434, demodulator / modulator 432, controller / processor 440 and / or memory 442 may perform Fig. 9 Operation 900.

[0081] Operations 900 begin at 902 by generating downlink control information (DCI) having one or more fields for conveying command or allocation information for multiple component carriers (CCs). At 904, a network entity sends the DCI to a user equipment (UE) to configure the UE to communicate in the multiple CCs according to the command or allocation information.

[0082] As described above, the BS may send DCI for multi-carrier scheduling, search space activation, and / or adaptation of transmission power in one of the corresponding multiple carriers. Fig.10 An example DCI format is illustrated that may be defined for delivering command and / or allocation information for multiple cells (carriers) simultaneously.Based on a configuration (eg, sent via RRC signaling), a DCI format may be associated with a set of cells.

[0083] like Fig.10As illustrated, the type of DCI used to convey command and / or allocation information (e.g., for multi-carrier scheduling, search space activation, and / or adaptation of transmission power in one of the corresponding multiple carriers) may include one or more common information fields and one or more dedicated information fields. The common information field may carry information applicable to all associated cells. The dedicated information field may carry information applicable only to the corresponding cell (e.g., each dedicated information field may be mapped to the corresponding cell).

[0084] DCI may be used to deliver SS set activation (and / or transmit power) commands for other cells. For example, the proposed DCI may be sent within the anchor search space. The dedicated information field may contain activation (or deactivation) commands / status for SS sets in other cells. Additionally or alternatively, the common information field may contain activation (or deactivation) commands / status for all search space sets in other cells.

[0085] There may be various types of activation use cases, which may or may not involve same-carrier (self-schedule, which refers to scheduling in the same carrier as the carrier in which the DCI is sent) or cross-carrier scheduling (referring to scheduling in a different carrier than the carrier in which the DCI is sent).

[0086] Fig.11 An example option for search space set activation command only is illustrated. As illustrated, a DCI sent in a primary CC (CC0) activates search spaces in multiple CCs (e.g., CC1-CC7). In this example, the DCI is only used for SS set activation, and scheduling grants for DL / UL data are not included in the DCI.

[0087] After receiving this type of DCI, the UE may send feedback to the BS for determination. After the SS set in a cell is activated, this search space may be used to convey the PDCCH for scheduling DL / UL data in the same cell.

[0088] Fig.12 Another example option for search space set activation command and self-scheduling is illustrated. Fig.11 In the example, the DCI sent in CC0 activates search spaces in multiple CCs. However, in this example, the DCI is used for both search space set activation and scheduling DL / UL data. In this example, since the DL / UL data is scheduled in the same cell as the cell in which the DCI is sent, the scheduling is called self-scheduling. In this case, the HARQ feedback for the scheduled data can be regarded as an acknowledgement from the UE to the reception of the search space set activation command.

[0089] Fig.13 Another example for search space set activation command and multi-cell scheduling is illustrated. As illustrated, in this case, DCI is used for SS set activation and DL / UL data is scheduled in all cells for which the DCI activates SSs.

[0090] In some cases, the scheduling grant may be the same for all cells (and may be carried in a common information field). On the other hand, the scheduling grant may be different for all cells (and these grants may be carried in corresponding dedicated information fields). In this case, the HARQ feedback for the scheduled data may be viewed as a determination from the UE to receive a search space set activation command.

[0091] like Fig.14 As illustrated, DCI can also be used for search space set deactivation. For deactivation, the above reference Figure 11-13 Similar DCI types and options as described. As illustrated, the DCI may deactivate SS in CC1-CC7 while scheduling DL / UL data in CC0.

[0092] The method disclosed herein includes one or more steps or actions for implementing the method. Method steps and / or actions can be interchanged with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be modified without departing from the scope of the claims.

[0093] As used herein, a phrase referring to "at least one" of a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination with multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc or any other order of a, b, and c).

[0094] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include computing, calculating, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, etc. Likewise, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), etc. Likewise, "determining" may include resolving, selecting, choosing, establishing, etc.

[0095] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but are intended to be given a full scope consistent with the language of the claims, wherein unless otherwise specified, references to elements in the singular form are not intended to mean "one and only one", but "one or more". Unless otherwise specifically specified, the term "some" refers to one or more. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure, known or to be known by those of ordinary skill in the art, are expressly incorporated herein by reference and are intended to be covered by the claims. Moreover, none of the contents disclosed herein are intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims. Any claim element will not be interpreted in accordance with the terms of 35 U.S.C. § 112 (f), unless the phrase "means for..." is used to expressly state the element, or the phrase "step for..." is used to state the element in the case of a method claim.

[0096] The various operations of the above methods may be performed by any suitable component capable of performing the corresponding functions. The component may include various hardware and / or software components (one or more) and / or modules (one or more), including but not limited to circuits, application specific integrated circuits (ASICs), or processors. In general, where operations are illustrated in the accompanying drawings, those operations may have corresponding means-plus-function components with similar numbers.

[0097] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed using a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration.

[0098] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. The bus may include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the user terminal 120 (see Figure 1 ), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and will not be described further. The processor may be implemented with one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuit systems that can execute software. Those skilled in the art will recognize how to best implement the described functionality for a processing system depending on the specific application and the overall design constraints imposed on the entire system.

[0099] If implemented in software, the function can be stored or sent as one or more instructions or codes on a computer-readable medium. Software should be broadly interpreted as meaning instructions, data, or any combination thereof, whether it is called software, firmware, middleware, microcode, hardware description language or other. Computer-readable media include both computer storage media and communication media, and communication media include any media that facilitates the transfer of computer programs from one place to another. The processor can be responsible for managing the bus and overall processing, including executing software modules stored on a machine-readable storage medium. The computer-readable storage medium can be coupled to the processor so that the processor can read information from the storage medium and can write information to the storage medium. In alternative cases, the storage medium can be integrated with the processor. For example, the machine-readable medium can include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium with instructions stored thereon separated from the wireless node, all of which can be accessed by the processor through a bus interface. Alternatively or additionally, the machine-readable medium or any part thereof can be integrated into the processor, such as the case where there can be a cache and / or a general register file. Examples of machine-readable storage media may include, for example, RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be embodied in a computer program product.

[0100] A software module may include a single instruction or multiple instructions, and may be distributed over several different code segments, distributed among different programs, and distributed across multiple storage media. A computer-readable medium may include multiple software modules. A software module includes instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include a sending module and a receiving module. Each software module may reside in a single storage device, or may be distributed across multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard drive into a RAM. During the execution of a software module, a processor may load some of the instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When referring to the functionality of the following software modules, it will be understood that such functionality is implemented by a processor when executing instructions from this software module.

[0101] Likewise, any connection is properly referred to as a computer-readable medium. For example, if a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared (IR), radio, microwave, etc. are used to transmit the software from a website, server, or other remote source, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and optical disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and optical disc. Disks, where magnetic disks typically reproduce data magnetically, and optical disks reproduce data optically with lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0102] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and / or encoded) thereon, the instructions being executed by one or more processors to perform the operations described herein. For example, the instructions are for performing the operations described herein and Figure 8 and Fig. 9 The operation illustrated.

[0103] Further, it should be understood that the modules and / or other appropriate components for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by the user terminal and / or base station when applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage component (e.g., RAM, ROM, a physical storage medium such as a compact disk (CD) or a floppy disk, etc.), so that the user terminal and / or base station can obtain the various methods when the storage component is coupled or provided to the device. Moreover, any other suitable technology for providing the methods and techniques described herein to the device can be utilized.

[0104] It will be understood that the claims are not limited to the precise configuration and components illustrated above. Various modifications, changes and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment UE, comprising: receiving downlink control information (DCI) in a first component carrier (CC), wherein the DCI comprises one or more fields for conveying a command for activating a search space for control channel decoding in a plurality of CCs, and wherein the DCI comprises a common grant or the same grant for scheduling data transmission in the first CC and data transmission in each of the plurality of CCs; monitoring the search spaces in the plurality of CCs for control channel information based on the command; communicating data transmissions in the plurality of CCs based on the schedule; as well as sending feedback confirming the scheduled data, wherein the feedback also serves as confirmation from the UE of receiving the search space set activation via the DCI, The DCI includes: one or more common information fields, used to carry information applicable to each CC in the plurality of CCs; and One or more dedicated information fields are used to carry information applicable only to a corresponding one CC among the multiple CCs.

2. The method of claim 1, wherein the DCI also schedules one or more transmissions in at least one CC of the plurality of CCs.

3. The method of claim 2, wherein the DCI is received in a first cell and is used to activate a search space in at least one other cell. 4 . The method of claim 1 , wherein at least one of the dedicated information fields indicates an activation or deactivation state of a search space set in a corresponding cell. 5 . The method of claim 1 , wherein at least one of the common information fields indicates an activation or deactivation status of all search space sets in other cells.

6. The method of claim 1, wherein: The DCI is used for search space set activation or deactivation and scheduling grant in the cell in which the DCI is sent.

7. The method of claim 1, wherein: The DCI is used for search space set activation or deactivation and scheduling grant in a plurality of cells in which the search space set is activated.

8. The method of claim 7, wherein the scheduling grant is the same for each cell in the plurality of cells.

9. The method of claim 7, wherein the scheduling grant is different for at least some of the plurality of cells.

10. The method of claim 1, wherein: The one or more fields convey a command for adjusting a transmit power of a transmission from the UE in one or more CCs of the plurality of CCs; as well as The method also includes adjusting a transmission power of the transmission in accordance with the command.

11. A method for wireless communication by a network entity, comprising: generating downlink control information (DCI) for a first component carrier (CC), wherein the DCI comprises one or more fields for conveying a command for activating a search space for control channel decoding in a plurality of CCs, and wherein the DCI comprises a common grant or the same grant for scheduling data transmission in the first CC and data transmission in each of the plurality of CCs; sending the DCI to a user equipment UE to configure the UE to communicate in the plurality of CCs according to the command; as well as treating feedback from the UE confirming the scheduled data as confirmation from the UE of receiving the search space set activation via the DCI, The DCI includes: one or more common information fields, used to carry information applicable to each CC in the plurality of CCs; and One or more dedicated information fields are used to carry information applicable only to a corresponding one CC among the multiple CCs.

12. The method of claim 11, wherein the DCI also schedules one or more transmissions in at least one CC of the plurality of CCs.

13. The method of claim 11, wherein the DCI is transmitted in a first cell and is used to activate a search space in at least one other cell.

14. The method of claim 11, wherein at least one of the dedicated information fields indicates an activation or deactivation state of a search space set in a corresponding cell.

15. The method of claim 11, wherein at least one of the common information fields indicates an activation or deactivation status of all search space sets in other cells.

16. The method of claim 11, wherein: The DCI is used for search space set activation or deactivation and scheduling grant in the cell in which the DCI is sent.

17. The method of claim 11, wherein: The DCI is used for search space set activation or deactivation and scheduling grant in a plurality of cells in which the search space set is activated.

18. The method of claim 17, wherein the scheduling grant is the same for each cell in the plurality of cells.

19. The method of claim 17, wherein the scheduling grant is different for at least some of the plurality of cells.

20. The method of claim 11, wherein: The one or more fields convey a command for adjusting transmit power of transmissions from the UE in one or more CCs of the plurality of CCs.

21. An apparatus for wireless communication by a user equipment UE, comprising: means for receiving downlink control information (DCI) in a first component carrier (CC), wherein the DCI comprises one or more fields for conveying a command for activating a search space for control channel decoding in the plurality of CCs, and wherein the DCI comprises a common grant or the same grant for scheduling data transmission in the first CC and data transmission in each of the plurality of CCs; means for monitoring the search space in the plurality of CCs for control channel information based on the command; as well as means for communicating data transmission in the plurality of CCs based on the schedule; means for sending feedback confirming the scheduled data, wherein the feedback also serves as confirmation from the UE of receipt of the search space set activation via the DCI, The DCI includes: one or more common information fields, used to carry information applicable to each CC in the plurality of CCs; and One or more dedicated information fields are used to carry information applicable only to a corresponding one CC among the multiple CCs.

22. An apparatus for wireless communication by a network entity, comprising: means for generating downlink control information (DCI) for a first component carrier (CC), wherein the DCI comprises one or more fields for conveying a command for activating a search space for control channel decoding in a plurality of CCs, and wherein the DCI comprises a common grant or the same grant for scheduling data transmission in the first CC and data transmission in each of the plurality of CCs; means for sending the DCI to a user equipment UE to configure the UE to communicate in the plurality of CCs according to the command; as well as means for treating feedback from the UE confirming the scheduled data as confirmation from the UE of receiving the search space set activation via the DCI, The DCI includes: one or more common information fields, used to carry information applicable to each CC in the multiple CCs; as well as One or more dedicated information fields are used to carry information applicable only to a corresponding one CC among the multiple CCs.

23. A computer readable medium comprising instructions which, when executed by a computer, cause the computer to perform the method according to any one of claims 1 to 10.

24. A computer readable medium comprising instructions which, when executed by a computer, cause the computer to perform the method according to any one of claims 11 to 20.

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