Patent Publication Number: US-2018049067-A1

Title: Techniques for enabling flexible guard-bands for a radio access technology in new radio

Description:
CLAIM OF PRIORITY UNDER 35 U.SC. § 119 
     The present Application for Patent claims priority to U.S. Provisional Application No. 62/374,542 entitled “TECHNIQUES FOR ENABLING FLEXIBLE GUARD-BANDS FOR A COMMUNICATION CHANNEL IN NEW RADIO” filed Aug. 12, 2016, which is assigned to the assignee hereof and hereby expressly incorporated by reference herein. 
    
    
     BACKGROUND 
     Aspects of this disclosure relate generally to telecommunications, and more particularly to techniques for enabling flexible guard-bands for a Radio Access Technology (RAT) during wireless communications. 
     Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical 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). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems. 
     These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. For example, fifth generation (5G) NR (new radio) communications technology is envisaged to expand and support diverse usage scenarios and applications with respect to current mobile network generations. In an aspect, 5G communications technology can include: enhanced mobile broadband addressing human-centric use cases for access to multimedia content, services and data; ultra-reliable-low latency communications (URLLC) with certain specifications for latency and reliability; and massive machine type communications, which can allow a very large number of connected devices and transmission of a relatively low volume of non-delay-sensitive information. As the demand for mobile broadband access continues to increase, however, further improvements in NR communications technology and beyond may be desired. 
     Techniques are needed to provide efficient and improved process when using guard-bands for a communication channel during wireless communications. In certain instances, as the next generation of wireless communications come into existence, specific latency and reliability requirements are needed to be met in order to ensure adequate levels of wireless communications. Specifically, guard-bands used in multi-channel communications may limit cross-channel interference at the edges of frequency band of each respective communication channel. However, these guard-bands are bandwidth dependent and do not allow for flexibility of their respective bandwidth length in different scenarios of various bandwidth deployments. Thus, improvements in enabling more effective use of flexible guard-bands for a RAT during wireless communication are desired. 
     SUMMARY 
     The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. 
     In accordance with an aspect, a method includes enabling flexible guard-bands for a Radio Access Technology (RAT) during wireless communications. The described aspects include receiving, at a user equipment (UE) from a network entity on a RAT, a guard-band configuration message to configure one or more guard-bands of the RAT based on one or more guard-band factors. The described aspects further include adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message, the adjusting further comprises adjusting a bandwidth of a transmission channel of the RAT based on adjusting the bandwidth of each of the one or more guard-bands of the RAT. The described aspects further include communicating with the network entity over the adjusted bandwidth of the transmission channel in response to adjusting the bandwidth of each of the one or more guard-bands of the RAT. 
     In another aspect, an apparatus for enabling flexible guard-bands for a RAT during wireless communications may include a transceiver, a memory; and at least one processor coupled to the memory and configured to receive, at a UE from a network entity on a RAT, a guard-band configuration message to configure one or more guard-bands of the RAT based on one or more guard-band factors. The described aspects further adjust a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message, the adjusting further comprises adjusting a bandwidth of a transmission channel of the RAT based on adjusting the bandwidth of each of the one or more guard-bands of the RAT. The described aspects further communicate with the network entity over the adjusted bandwidth of the transmission channel in response to adjusting the bandwidth of each of the one or more guard-bands of the RAT. 
     In another aspect, a computer-readable medium may store computer executable code for enabling flexible guard-bands for a RAT during wireless communications. The described aspects include code for receiving, at a UE from a network entity on a RAT, a guard-band configuration message to configure one or more guard-bands of the RAT based on one or more guard-band factors. The described aspects further include code for adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message, the code for adjusting further comprises code for adjusting a bandwidth of a transmission channel of the RAT based on adjusting the bandwidth of each of the one or more guard-bands of the RAT. The described aspects further include code for communicating with the network entity over the adjusted bandwidth of the transmission channel in response to adjusting the bandwidth of each of the one or more guard-bands of the RAT. 
     In another aspect, an apparatus for enabling flexible guard-bands for a RAT during wireless communications is described. The described aspects include means for receiving, at a UE from a network entity on a RAT, a guard-band configuration message to configure one or more guard-bands of the RAT based on one or more guard-band factors. The described aspects further include means for adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message, the code for adjusting further comprises code for adjusting a bandwidth of a transmission channel of the RAT based on adjusting the bandwidth of each of the one or more guard-bands of the RAT. The described aspects further include means for communicating with the network entity over the adjusted bandwidth of the transmission channel in response to adjusting the bandwidth of each of the one or more guard-bands of the RAT. 
     In accordance with another aspect, a method includes enabling flexible guard-bands for a RAT during wireless communications. The described aspects include determining, based on one or more guard-band factors, a guard-band configuration message to configure one or more guard-bands of a RAT established with a UE. The described aspects further include transmitting, to the UE over the RAT, the guard-band configuration message. The described aspects further include communicating with the UE over an adjusted bandwidth of the transmission channel in response to the UE adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message. 
     In another aspect, an apparatus for enabling flexible guard-bands for a RAT during wireless communications may include a transceiver, a memory; and at least one processor coupled to the memory and configured to determine, based on one or more guard-band factors, a guard-band configuration message to configure one or more guard-bands of a RAT established with a UE. The described aspects further transmit, to the UE over the RAT, the guard-band configuration message. The described aspects further communicate with the UE over an adjusted bandwidth of the transmission channel in response to the UE adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message. 
     In another aspect, a computer-readable medium may store computer executable code for enabling flexible guard-bands for a RAT during wireless communications. The described aspects include code for determining, based on one or more guard-band factors, a guard-band configuration message to configure one or more guard-bands of a RAT established with a UE. The described aspects further include code for transmitting, to the UE over the RAT, the guard-band configuration message. The described aspects further include code for communicating with the UE over an adjusted bandwidth of the transmission channel in response to the UE adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message. 
     In another aspect, an apparatus for enabling flexible guard-bands for a RAT during wireless communications is described. The described aspects include means for determining, based on one or more guard-band factors, a guard-band configuration message to configure one or more guard-bands of a RAT established with a UE. The described aspects further include means for transmitting, to the UE over the RAT, the guard-band configuration message. The described aspects further include means for communicating with the UE over an adjusted bandwidth of the transmission channel in response to the UE adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message. 
     Various aspects and features of the disclosure are described in further detail below with reference to various examples thereof as shown in the accompanying drawings. While the present disclosure is described below with reference to various examples, it should be understood that the present disclosure is not limited thereto. Those of ordinary skill in the art having access to the teachings herein will recognize additional implementations, modifications, and examples, as well as other fields of use, which are within the scope of the present disclosure as described herein, and with respect to which the present disclosure may be of significant utility. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The features, nature, and advantages of the present disclosure will become more apparent from the detailed description set forth below when taken in conjunction with the drawings in which like reference characters identify correspondingly throughout, where dashed lines may indicate optional components or actions, and wherein: 
         FIGS. 1 and 2  are schematic diagrams of a communication network including an aspect of an enablement component during wireless communications in accordance with various aspects of the present disclosure. 
         FIGS. 3 and 4  are flow diagrams illustrating example methods of enabling flexible guard-bands for a RAT during wireless communications in accordance with various aspects of the present disclosure. 
         FIG. 5  is a diagram of example guard-bands enabled for a RAT during wireless communications in accordance with various aspects of the present disclosure. 
         FIG. 6  is a diagram of flexible guard-bands enabled for a RAT during wireless communications in accordance with various aspects of the present disclosure. 
         FIG. 7  is a conceptual data flow diagram illustrating the data flow between different means/components in an exemplary apparatus including a enablement component in accordance with the present aspects. 
         FIG. 8  is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system including a enablement component in accordance with the present aspects. 
         FIG. 9  is a conceptual data flow diagram illustrating the data flow between different means/components in an exemplary apparatus including a enablement configuration component in accordance with the present aspects. 
         FIG. 10  is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system including a enablement configuration component in accordance with the present aspects. 
     
    
    
     DETAILED DESCRIPTION 
     The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known components are shown in block diagram form in order to avoid obscuring such concepts. In an aspect, the term “component” as used herein may be one of the parts that make up a system, may be hardware or software, and may be divided into other components. 
     The present aspects generally relate to enabling flexible guard-bands for a RAT during wireless communications. In particular, guard-bands are typically used in multi-channel cellular communications and unlicensed wireless communications, such as, but not limited to, Long Term Evolution (LTE) and IEEE 802.11. For example, guard-bands may provide isolation between channels and between bands, and may reduce emission levels and cross interference at a channel&#39;s edge and band&#39;s edge. In an aspect, systems operating on both sides of a band edge may be different. In this aspect, for example, one side may correspond to a Global System for Mobile Communications (GSM) system while the other side may correspond to an LTE system. In another example, one side may correspond to an LTE Time Division Duplex (TDD) system while the other side may correspond to an LTE Frequency Division Duplex (FDD) system. In this example, the boundaries may occur at band edges of LTE FDD in band 3 (B3) and LTE TDD in B39, LTE TDD in B39 and LTE FDD in B1, and LTE FDD in B7 and LTE TDD in B38 operating in a geographical area. Furthermore, systems operating on both sides of a channel edge may be identical, such as LTE TDD, but systems on both sides may not be synchronized; or synchronized but with different downlink-uplink configurations as in the instances of LTE TDD in B38, B40, B42, and B43. 
     Moreover, as the next generation of wireless communications come into existence (e.g., 5G NR communications), fragmentation of spectrum allocation is expected due to limited availability of the wideband spectrum. As a result, each spectrum may face different band edge emission regulations. However, traditionally guard-bands are defined either as operating bandwidth dependent or as fixed guard-band. For operating bandwidth dependent, guard-bands may be configured as ten (10) percent of the operating bandwidth. Therefore, a need exists for a communication implementation that fulfills the throughput, latency and reliability requirements for the next generation of wireless communications (e.g., 5G NR communications) by making more effective use of the bandwidth resources available and rely less on fixed or set bandwidth usage. 
     Accordingly, in some aspects, the present methods and apparatuses may provide an efficient solution, as compared to legacy solutions, by enabling flexible guard-bands for a RAT during wireless communications. In other words, in the present aspects, a network entity may determine flexible guard-bands for a UE that it is in communication with in order to satisfy emission, throughput, latency and reliability requirements. As such, the present aspects provide one or more mechanisms for determining, based on one or more guard-band factors, a guard-band configuration message to configure one or more guard-bands of a RAT established with a UE. Moreover, the present aspects also provide one or more mechanisms for transmitting, to the UE over the RAT, the guard-band configuration message. Additionally, the present aspects also provide one or more mechanisms for receiving, at a UE from a network entity on a RAT, a guard-band configuration message to configure one or more guard-bands of the RAT based on one or more guard-band factors. The present aspects further provide one or more mechanisms for adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message, the adjusting further comprises adjusting a bandwidth of a transmission channel of the RAT. The present aspects further provide one or more mechanisms for communicating between the UE and the network entity over the adjusted bandwidth of the transmission channel. 
     It should be noted that the techniques described herein may be used for various wireless communication networks such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other systems. The terms “system” and “network” are often used interchangeably. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. IS-2000 Releases 0 and A are commonly referred to as CDMA2000 1×, 1×, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1×EV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM™, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS that use 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 techniques described herein may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies, including cellular (e.g., LTE) communications over a shared radio frequency spectrum band. The description below, however, describes an LTE/LTE-A system for purposes of example, and LTE terminology is used in much of the description below, although the techniques are applicable beyond LTE/LTE-A applications (e.g., to 5G networks or other next generation communication systems). 
     The following description provides examples, and is not limiting of the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For instance, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Also, features described with respect to some examples may be combined in other examples. 
     Referring to  FIG. 1  and  FIG. 2 , in an aspect, a wireless communication system  100  includes at least one user equipment (UE)  115  in communication coverage of at least network entities  105 . The UE  115  may communicate with network via network entity  105 . In an example, UE  115  may transmit and/or receive wireless communication to and/or from network entity  105  via one or more communication channels  125  of a RAT, which may include an uplink communication channel (or simply uplink channel bandwidth region) and a downlink communication channel (or simply downlink channel bandwidth region), such as but not limited to an uplink data channel and/or downlink data channel, a control channel. Such wireless communications may include, but are not limited to, data, audio and/or video information. Moreover, in an example, the wireless communications between UE  115  and network entity  105  may include 5G NR communications. 
     Referring to  FIG. 1 , in accordance with the present disclosure, UE  115  may include a memory  44 , one or more processors  20  and a transceiver  60 . The memory, one or more processors  20  and the transceiver  60  may communicate internally via a bus  11 . In some examples, the memory  44  and the one or more processors  20  may be part of the same hardware component (e.g., may be part of a same board, module, or integrated circuit). Alternatively, the memory  44  and the one or more processors  20  may be separate components that may act in conjunction with one another. In some aspects, the bus  11  may be a communication system that transfers data between multiple components and subcomponents of the UE  115 . In some examples, the one or more processors  20  may include any one or combination of modem processor, baseband processor, digital signal processor and/or transmit processor. Additionally or alternatively, the one or more processors  20  may include an enablement component  130  for carrying out one or more methods or procedures described herein. In an aspect, the term “component” as used herein may be one of the parts that make up a system, may be hardware, firmware, and/or software, and may be divided into other components. The enablement component  130 , and each of its subcomponents, may comprise hardware, firmware, and/or software and may be configured to execute code or perform instructions stored in a memory (e.g., a computer-readable storage medium). 
     In some examples, the UE  115  may include the memory  44 , such as for storing data used herein and/or local versions of applications or communication with enablement component  130  and/or one or more of its subcomponents being executed by the one or more processors  20 . Memory  44  can include any type of computer-readable medium usable by a computer or processor  20 , such as random access memory (RAM), read only memory (ROM), tapes, magnetic discs, optical discs, volatile memory, non-volatile memory, and any combination thereof. In an aspect, for example, memory  44  may be a computer-readable storage medium (e.g., a non-transitory medium) that stores one or more computer-executable codes defining enablement component  130  and/or one or more of its subcomponents, and/or data associated therewith, when UE  115  is operating processor  20  to execute enablement component  130  and/or one or more of its subcomponents. In some examples, the UE  115  may further include a transceiver  60  for transmitting and/or receiving one or more data and control signals to/from the network via network entity  105 . The transceiver  60  may comprise hardware, firmware, and/or software and may be configured to execute code or perform instructions stored in a memory (e.g., a computer-readable storage medium). The transceiver  60  may include a first (1 st ) radio access technology (RAT) radio  160  (e.g. UMTS/WCDMA, LTE-A, WLAN, Bluetooth, WSAN-FA) comprising a modem  165 , and a second (2 nd ) RAT radio  170  (e.g., 5G) comprising a modem  175 . The 1 st  RAT radio  160  and 2 nd  RAT radio  170  may utilize one or more antennas  64  for transmitting signals to and receiving signals from the network entity  105 . In some examples, the transceiver  60  may only include the 2 nd  RAT radio  170 . 
     In a blended radio environment such as system  100 , different RATs may make use of different channels at different times. Because different RATs are sharing the spectrum and operating partly independently of others, access to one channel may not imply access to another channel. Accordingly, a device capable of transmitting using multiple channels may need to determine whether each channel is available before transmitting. In order to increase bandwidth and throughput, it may be beneficial in some situations to wait for an additional channel to become available rather than transmitting using currently available channel(s). 
     Similarly, with regard to  FIG. 2 , network entity  105  may include a memory  45 , one or more processors  21  and a transceiver  61 . Memory  45 , one or more processors  21  and a transceiver  61  may operate in the same and/or similar manner to memory  44 , one or more processors  20  and a transceiver  60  of UE  115  described in  FIG. 1 . Furthermore, memory  45 , one or more processors  21  and a transceiver  61  may operate the same and/or similar components including, but not limited to a 1 st  RAT radio  161  with modem  166 , a 2 nd  RAT radio  171  with modem  176 , and antennas  65 . Moreover, memory  45 , one or more processors  21  and the transceiver  61  may communicate internally via a bus  12 . In some examples, the transceiver  61  may only include the 2 nd  RAT radio  171 . 
     In some examples, the enablement components  130 / 140  may be configured to enable flexible guard-bands for a communication channel  125  during wireless communications. In an aspect, for example, UE  115  may perform a random access procedure to connect with the network entity  105 . Once UE  115  has connected with network entity  105  and has access to the network, UE  115  may communicate with network entity  105  via, at least, an uplink channel bandwidth, downlink channel bandwidth of the communication channel  125  on a first Radio Access Technology (RAT). However, in order to avoid interference with other adjacent RATs, the network entity  105  may enable flexible guard-bands at the edges of the communication channel  125 . 
     Referring to  FIG. 2 , in an aspect, network entity  105  and/or enablement component  140  may include determining component  142 , which may be configured to determine, based on one or more guard-band factors  144 , a guard-band configuration message  132  to configure one or more guard-bands (e.g., low-end guard-band(s)  136  and high-end guard-band(s)  138 ) of a communication channel  125  of a RAT established with a UE  115 . The guard-band configuration message  132  may include information corresponding to the width of band and/or location on frequency spectrum. As noted above, the guard-band configuration message  132  may include information for configuring a low-end guard-band(s)  136  and a high-end guard-band(s)  138  of the downlink and uplink of communication channel  125 . For example, the low-end guard-band(s)  136  and the high-end guard-band(s)  138  of the communication channel  125  may each provide a frequency region for minimizing interference between the RAT and one or more adjacent RATs. Specifically, the guard-band configuration message  132  includes at least one of the width of the guard-bands, location on the frequency spectrum of the guard-bands and/or the communication channel  125 , etc. 
     In an example, the one or more guard-band factors  144  corresponds to at least one of a deployment band factor, a network category factor, or a UE specific factor. The deployment band factor may include at least one of spectral emission mask (SEM) requirements based on the band, neighbor requirements (e.g., synchronization/asynchronization TDD, TDD/FDD), network entity location (e.g., depending on the location of a network entity, the system may be required to provide additional protection to neighbor deployments). The network category factor may correspond to the cost of a network entity  105  (e.g., a macro eNB) that may either be expected to be able to meet tighter requirements for filtering or the network entity  105  (e.g., HeNB) may use relaxed requirements. The UE specific factor may correspond to the maximum bandwidth allocated to UE  115  which may depend on the deployment as well as UE specific geo-location (e.g., a UE in close proximity to a satellite dish may not be allocated resource blocks (RBs) close to the edge of the band). 
     In an aspect, network entity  105  and/or enablement component  140  may execute transceiver  61  and/or 2 nd  RAT radio  171  (e.g., 5G) to transmit, to the UE  115  over the communication channel  125  of the RAT, the guard-band configuration message  132  to configure the UE  115  to adjust a bandwidth  137  of the low-end guard-bands  136  and a bandwidth  139  of the high-end guard-bands  138  of the communication channel  125 . For example, transceiver  61  and/or 2 nd  RAT radio  171  may transmit the guard-band configuration message  132  within a control channel bandwidth region of the communication channel  125  of the RAT. The guard-band configuration message  132  may be transmitted on the Physical Downlink Control Channel (PDCCH) and/or in Radio Resource Control (RRC) messages. 
     Referring back to  FIG. 1 , in an aspect, UE  115  may execute enablement component  130  to receive, from a network entity  105  on a communication channel  125  of the RAT, a guard-band configuration message  132  to configure one or more guard-bands of the communication channel  125  (e.g., a low-end guard-band(s)  136  and a high-end guard-band(s)  138 ) based on one or more guard-band factors  144 . For example, transceiver  60  and/or 2 nd  RAT radio  170  may receive the guard-band configuration message  132  within a control channel bandwidth region of the communication channel  125 . As noted above, the low-end guard-band(s)  136  and the high-end guard-band(s)  138  of the communication channel  125  each provide a frequency region for minimizing interference between the communication channel  125  and one or more adjacent communication channels. In an example, the transmission channel may correspond to and/or include an uplink channel bandwidth region and a downlink channel bandwidth region. As such, the guard-band configuration message  132  may include information for configuring the low-end guard-band(s)  136  and the high-end guard-band(s)  138  on an uplink channel bandwidth region and the low-end guard-band(s)  136  and the high-end guard-band(s)  138  on a downlink channel bandwidth region. 
     In another example, the guard-band configuration message  132  may include information for configuring the low-end guard-band(s)  136  independently of configuring the high-end guard-band(s)  138 . For example, the guard-band configuration message  132  may include information only for configuring the low-end guard-band(s)  136 , or the guard-band configuration message  132  may include information only for configuring the high-end guard-band(s)  138 . Similarly, the guard-band configuration message  132  may include information only for configuring the low-end guard-band(s)  136  and the high-end guard-band(s)  138  associated with the uplink channel bandwidth region, or the low-end guard-band(s)  136  and the high-end guard-band(s)  138  associated with the downlink channel bandwidth region. As such, the guard-band configuration message  132  may be configured by the determining component  142  in a plurality of ways to configure the one or more guard-bands of the communication channel  125 . 
     In an aspect, UE  115  may include adjusting component  134 , which may be configured to adjust a bandwidth of each of the one or more guard-bands of the communication channel  125  of the RAT based on the guard-band configuration message  132 . Adjusting bandwidth of each of the one or more guard-bands may cause adjustment of a bandwidth of a transmission channel of the communication channel  125 . For example, adjusting component  134  may adjust a bandwidth  137  of a low-end guard-band  136  and a bandwidth  139  of a high-end guard-band  138  of the communication channel  125 . Furthermore, when a first portion of the transmission channel is associated with an uplink channel bandwidth region and a second portion of the transmission channel is associated with a downlink channel bandwidth region, the guard-band configuration message  132  may include information for configuring the low-end guard-band  136  and the high-end guard-band  138  associated with the uplink channel bandwidth region and the low-end guard-band  136  and the high-end guard-band  138  associated with the downlink channel bandwidth region. 
     Moreover, as noted above, the guard-band configuration message  132  may include information for configuring the low-end guard-band  136  independently of configuring the high-end guard-band  138 . In an example, the bandwidth  137  of the low-end guard-band  136  and the bandwidth  139  of the high-end guard-band  138  for both the uplink channel bandwidth region and the downlink channel bandwidth region may be fixed for the network entity  105  based on a geographic area of UE  115 . The geographic area of UE  115  is available to the network entity  105  through positioning techniques employed by the network entity  105 . In some examples, the bandwidth  137  of the low-end guard-band  136  may be different from the bandwidth  139  of the high-end guard-band  138 . In a further example, the bandwidth  137  of the low-end guard-band  136  and the bandwidth  139  of the high-end guard-band  138  for the uplink channel bandwidth region may be different from the bandwidth  137  of the low-end guard-band  136  and the bandwidth  139  of the high-end guard-band  138  for the downlink channel bandwidth region. Moreover, adjusting component  134  may adjust the bandwidth  137  of the low-end guard-band  136  from a previous bandwidth of the low-end guard-band  136  and the bandwidth  139  of the high-end guard-band  138  from a previous bandwidth of the high-end guard-band  138 . In an example, the previous bandwidth of the low-end guard-band  136  corresponds to a minimum bandwidth of the low-end guard-band  136  and the previous bandwidth of the high-end guard-band  138  corresponds to a minimum bandwidth of the high-end guard-band  138 . 
     In an aspect, in response to adjusting the bandwidth of the one or more guard-bands of the communication channel  125 , UE  115  and/or enablement component  130  may execute transceiver  60  and network entity  105  and/or enablement component  140  may execute transceiver  61  to communicate over the adjusted bandwidth of the transmission channel. For example, UE  115  may execute transceiver  60  and/or 2 nd  RAT radio  170  to communicate either on the uplink channel bandwidth region and/or downlink channel bandwidth region with the transceiver  61  and/or 2 nd  RAT radio  171  of network entity  105 . As noted above, the bandwidths of the uplink channel bandwidth region and the downlink channel bandwidth region may be adjusted in response to the adjustment of the bandwidths of the low-end guard-band  136  and the high-end guard-band  138  for both the uplink channel bandwidth region and the downlink channel bandwidth region. The UE  115  may communicate with the network entity  105  while operating in a ultra-reliable low latency communication (URLLC) mode. 
     A UE  115  may also be referred to by those skilled in the art as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. A UE  115  may be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wearable item such as a watch or glasses, a wireless IoT device, a wireless local loop (WLL) station, or the like. A UE  115  may be able to communicate with macro eNodeBs, small cell eNodeBs, relays, and the like. A UE  115  may also be able to communicate over different access networks, such as cellular or other WWAN access networks, or WLAN access networks. 
     Additionally, as used herein, the one or more wireless nodes, including, but not limited to, network entity  105  of wireless communication system  100 , may include one or more of any type of network component, such as an access point, including a base station or node B, an access node, a radio transceiver, a NodeB, eNodeB (eNB), gNB, Home NodeB, a Home eNodeB, a relay, a peer-to-peer device, an authentication, authorization and accounting (AAA) server, a mobile switching center (MSC), a radio network controller (RNC), etc. In a further aspect, the one or more wireless serving nodes of wireless communication system  100  may include one or more small cell base stations, such as, but not limited to a femtocell, picocell, microcell, or any other base station having a relatively small transmit power or relatively small coverage area as compared to a macro base station. 
       FIG. 3  and  FIG. 4  are flow diagrams illustrating examples of methods related to enabling flexible guard-bands for a communication channel with various aspects of the present disclosure. Although the operations described below are presented in a particular order and/or as being performed by an example component, it should be understood that the ordering of the actions and the components performing the actions may be varied, depending on the implementation. Also, although the enablement components  130  and  140  are illustrated as having a number of subcomponents, it should be understood that one or more of the illustrated subcomponents may be separate from, but in communication with, the enablement components  130  and  140 , and/or each other. Moreover, it should be understood that any of actions or components described below with respect to the components  130  and  140  and/or their subcomponents may be performed by a specially-programmed processor, a processor executing specially-programmed software or computer-readable media, or by any other combination of a hardware component and/or a software component specially configured for performing the described actions or components. 
     Referring to  FIG. 3 , in an aspect, at block  302 , method  300  includes receiving, at a UE from a network entity on a RAT, a guard-band configuration message to configure one or more guard-bands of the RAT based on one or more guard-band factors. In an aspect, for example, UE  115  may execute transceiver  60  and/or enablement component  130  ( FIG. 1 ) to receive, from a network entity  105  on a communication channel  125  of the RAT, a guard-band configuration message  132  to configure one or more guard-bands (a low-end guard-band  136  and a high-end guard-band  138 ) of the communication channel  125  based on one or more guard-band factors  144 . In an example, the low-end guard-band  136  and the high-end guard-band  138  of the communication channel  125  may each provide a frequency region for minimizing interference between the RAT and one or more adjacent RATs. 
     In an aspect, at block  304 , method  300  includes adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message, the adjusting further comprises adjusting a bandwidth of a transmission channel of the RAT based on adjusting the bandwidth of each of the one or more guard-bands of the RAT. In an aspect, for example, UE  115  may execute enablement component  130  ( FIG. 1 ) and/or adjusting component  134  to adjust a bandwidth of each of the one or more guard-bands of the communication channel  125  of the RAT based on the guard-band configuration message  132 , the adjusting further comprises adjusting a bandwidth of a transmission channel of the communication channel  125  based on adjusting the bandwidth of each of the one or more guard-bands of the RAT. 
     In an aspect, at block  306 , method  300  includes communicating with the network entity over the adjusted bandwidth of the transmission channel in response to adjusting the bandwidth of each of the one or more guard-bands of the RAT. In an aspect, for example, UE  115  and/or enablement component  130  ( FIG. 1 ) may execute transceiver  60  (and more specifically 2 nd  RAT radio  170  (e.g., 5G)) to communicate with the network entity  105  over the adjusted bandwidth of the transmission channel in response to adjusting the bandwidth of each of the one or more guard-bands of the RAT. 
     Referring to  FIG. 4 , in an aspect, at block  402 , method  400  includes determining, based on one or more guard-band factors, a guard-band configuration message to configure one or more guard-bands of a RAT established with a UE. In an aspect, for example, network entity  105  may execute enablement component  140  ( FIG. 2 ) and/or determining component  142  to determine, based on one or more guard-band factors  144 , a guard-band configuration message  132  to configure one or more guard-bands of a communication channel  125  established with a UE  115 . As noted above, the low-end guard-band  136  and the high-end guard-band  138  of the communication channel  125  may each provide a frequency region for minimizing interference between the communication channel  125  and one or more adjacent communication channels. 
     In an aspect, at block  404 , method  400  includes transmitting, to the UE over the RAT, the guard-band configuration message. In an aspect, for example, network entity  105  and/or enablement component  140  ( FIG. 2 ) may execute transceiver  61  to transmit, to the UE  115  over the communication channel  125 , the guard-band configuration message  132 . 
     In an aspect, at block  406 , method  400  includes communicating with the UE over an adjusted bandwidth of the transmission channel in response to the UE adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message. In an aspect, for example, network entity  105  and/or enablement component  140  ( FIG. 2 ) may execute transceiver  61  to communicate with the UE  115  over an adjusted bandwidth of the transmission channel in response to the UE  115  adjusting a bandwidth of each of the one or more guard-bands of the communication channel  125  based on the guard-band configuration message  132 . 
       FIG. 5  illustrates an example communication channel  500  of a RAT with static guard-bands enabled during wireless communications. For example, a communication channel  500 , similar to communication channel  125  ( FIG. 1 ) of a RAT, may include a channel bandwidth, a transmission channel bandwidth of the transmission channel, and guard-band for the one or more guard-bands. The communication channel may be established between a network entity, similar to network entity  105  ( FIG. 1 ), and a UE, similar to UE  115  ( FIG. 1 ). 
     In an aspect, the communication channel  500  may include a communication channel bandwidth region  502  that corresponds to a downlink channel bandwidth region, uplink channel bandwidth region in FDD system, or both in TDD system. Furthermore, the guard-bands are not configured to be flexible, as such, low-end guard-band region  504  and high-end guard-band region  506  are static. That is, the bandwidth for both regions  504  and  506  are not adjustable through the course of communications between UE  115  and network entity  105 . In some aspects, guard-band regions  504  and  506  are defined either as operating bandwidth dependent or as fixed guard-band. For operating bandwidth dependent, guard-bands may be configured as ten (10) percent of the operating bandwidth (i.e., the channel bandwidth of communication channel  500 ). 
       FIG. 6  illustrates an example communication channel  600  of a RAT with flexible guard-bands enabled during wireless communications. For example, a communication channel  600 , similar to communication channel  125  ( FIG. 1 ) of a RAT, may include a channel bandwidth (MHz), a maximum transmission channel bandwidth (MHz) of the transmission channel, and minimum guard-band (MHz) for the one or more guard-bands. The communication channel may be established between a network entity, similar to network entity  105  ( FIG. 1 ), and a UE, similar to UE  115  ( FIG. 1 ). 
     In an aspect, the communication channel  600  may include a downlink channel bandwidth region  602 , uplink channel bandwidth region  604 , and a control channel region  606 . Furthermore, the network entity may enable flexible guard-bands by configuring the bandwidths of the low-end guard-band and the high-end guard-band. The network entity may transmit a guard-band configuration message on bandwidths associated with the control channel  606  to the UE in order to instruct the UE to adjust the bandwidths of the low-end guard-band and the high-end guard-band based on one or more guard-band factors. The control channel  606  may be configured at the center of the communication channel  600  with a specific bandwidth so as to prevent the control channel  606  from overlapping with the guard-bands. 
     In some aspects, the UE may be instructed to adjust the bandwidths of the low-end guard-band and the high-end guard-band associated with the downlink channel bandwidth region  602  differently from the bandwidths of the low-end guard-band and the high-end guard-band associated with the uplink channel bandwidth region  604 . Thus, as depicted in  FIG. 6 , the bandwidth of the low-end guard-band of the downlink channel bandwidth region  602  may be less than the bandwidth of the low-end guard-band of the uplink channel bandwidth region  604 . Similarly, the bandwidth of the high-end guard-band of the downlink channel bandwidth region  602  may be less than the bandwidth of the high-end guard-band of the uplink channel bandwidth region  604 . As such, the UE and the network entity may communicate across a larger bandwidth on the downlink channel bandwidth region than on the uplink channel bandwidth region, or vice versa.  FIG. 6  is shown for TDD system, but it could apply to FDD system as well, where uplink and downlink frequencies are separated. 
       FIG. 7  is a conceptual data flow diagram  700  illustrating the data flow between different means/components in an exemplary apparatus  702  that includes enablement component  130 . The apparatus  702  may be a UE, for example, UE  115  of  FIG. 1 . The apparatus  702  includes reception component  704  that, in an aspect, receives, at a UE from a network entity on a RAT, a guard-band configuration message to configure one or more guard-bands of the RAT based on one or more guard-band factors. The apparatus  702  includes a enablement component  130  that adjusts a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message, the adjusting further comprises adjusting a bandwidth of a transmission channel of the RAT based on adjusting the bandwidth of each of the one or more guard-bands of the RAT. In an aspect, the apparatus  702  further includes a transmission component  712  that communicates with the network entity over the adjusted bandwidth of the transmission channel in response to adjusting the bandwidth of each of the one or more guard-bands of the RAT. 
     The apparatus may include additional components that perform each of the blocks of the method  300  in the aforementioned flowchart of  FIG. 3 . As such, each block in the aforementioned flowchart of  FIG. 3  may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof. 
       FIG. 8  is a diagram  800  illustrating an example of a hardware implementation for an apparatus  702 ′ employing a processing system  814  that includes the enablement component  130 . The processing system  814  may be implemented with a bus architecture, represented generally by the bus  824 . The bus  824  may include any number of interconnecting buses and bridges depending on the specific application of the processing system  814  and the overall design constraints. The bus  824  links together various circuits including one or more processors and/or hardware components, represented by the processor  804 , which may be the same as or similar to processor(s)  20  ( FIG. 1 ), the components  704 ,  712 , and the computer-readable medium/memory  806 , which may be the same as or similar to memory  44  ( FIG. 1 ). The bus  824  may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further. 
     The processing system  814  may be coupled to a transceiver  810 . The transceiver  810  is coupled to one or more antennas  820 . The transceiver  810  provides a means for communicating with various other apparatus over a transmission medium. The transceiver  810  receives a signal from the one or more antennas  820 , extracts information from the received signal, and provides the extracted information to the processing system  814 , specifically the reception component  704 . In addition, the transceiver  810  receives information from the processing system  814 , specifically the transmission component  812 , and based on the received information, generates a signal to be applied to the one or more antennas  820 . The processing system  814  includes a processor  804  coupled to a computer-readable medium/memory  806 . The processor  804  is responsible for general processing, including the execution of software stored on the computer-readable medium/memory  806 . The software, when executed by the processor  804 , causes the processing system  814  to perform the various functions described supra for any particular apparatus. The computer-readable medium/memory  806  may also be used for storing data that is manipulated by the processor  804  when executing software. The processing system  814  further includes at least one of the components  130 ,  704 , and  712 . The components may be software components running in the processor  804 , resident/stored in the computer readable medium/memory  806 , one or more hardware components coupled to the processor  804 , or some combination thereof. 
     In one configuration, the apparatus  802 / 702 ′ for wireless communication includes means for receiving, at a UE from a network entity on a RAT, a guard-band configuration message to configure one or more guard-bands of the RAT based on one or more guard-band factors. The apparatus further includes means for adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message, the adjusting further comprises adjusting a bandwidth of a transmission channel of the RAT. Additionally, the apparatus includes means for communicating with the network entity over the adjusted bandwidth of the transmission channel. 
       FIG. 9  is a conceptual data flow diagram  900  illustrating the data flow between different means/components in an exemplary apparatus  902  that includes the measurement enablement component  140 . The apparatus  902  may be a network entity, for example, network entity  105  of  FIG. 2 . The apparatus  902  includes the enablement component  140  that determine, based on one or more guard-band factors, a guard-band configuration message to configure one or more guard-bands of a RAT established with a UE. In an aspect, the apparatus  902  further includes a transmission component  912  that transmits, to the UE over the RAT, the guard-band configuration message. The apparatus  900  includes reception component  904 , which along with transmission component  912 , communicates with the UE over an adjusted bandwidth of the transmission channel in response to the UE adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message 
     The apparatus may include additional components that perform each of the blocks of the method  400  in the aforementioned flowchart of  FIG. 4 . As such, each block in the aforementioned flowchart of  FIG. 4  may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof. 
       FIG. 10  is a diagram  1000  illustrating an example of a hardware implementation for an apparatus  902 ′ employing a processing system  1014  that includes enablement component  140 . The processing system  1014  may be implemented with a bus architecture, represented generally by the bus  1024 . The bus  1024  may include any number of interconnecting buses and bridges depending on the specific application of the processing system  1014  and the overall design constraints. The bus  1024  links together various circuits including one or more processors and/or hardware components, represented by the processor  1004 , which may be the same as or similar to processor(s)  21  ( FIG. 2 ), the components,  912 , and the computer-readable medium/memory  1006 , which may be the same as or similar to memory  45  ( FIG. 2 ). The bus  1024  may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further. 
     The processing system  1014  may be coupled to a transceiver  1010 . The transceiver  1010  is coupled to one or more antennas  1020 . The transceiver  1010  provides a means for communicating with various other apparatus over a transmission medium. The transceiver  1010  receives a signal from the one or more antennas  1020 , extracts information from the received signal, and provides the extracted information to the processing system  1014 , specifically the reception component  904 . In addition, the transceiver  1010  receives information from the processing system  1014 , specifically the transmission component  1012 , and based on the received information, generates a signal to be applied to the one or more antennas  1020 . The processing system  1014  includes a processor  1004  coupled to a computer-readable medium/memory  1006 . The processor  1004  is responsible for general processing, including the execution of software stored on the computer-readable medium/memory  1006 . The software, when executed by the processor  1004 , causes the processing system  1014  to perform the various functions described supra for any particular apparatus. The computer-readable medium/memory  1006  may also be used for storing data that is manipulated by the processor  1004  when executing software. The processing system  1014  further includes at least one of the components  140 ,  904 , and  912 . The components may be software components running in the processor  1004 , resident/stored in the computer readable medium/memory  1006 , one or more hardware components coupled to the processor  1004 , or some combination thereof. 
     In one configuration, the apparatus  1002 / 902 ′ for wireless communication includes means for determining, based on one or more guard-band factors, a guard-band configuration message to configure one or more guard-bands of a RAT established with a UE. The apparatus further includes means for transmitting, to the UE over the RAT, the guard-band configuration message. Additionally, the apparatus includes means for communicating with the UE over an adjusted bandwidth of the transmission channel in response to the UE adjusting a bandwidth of each of the one or more guard-bands of the RAT based on the guard-band configuration message. 
     In some aspects, an apparatus or any component of an apparatus may be configured to (or operable to or adapted to) provide functionality as taught herein. This may be achieved, for example: by manufacturing (e.g., fabricating) the apparatus or component so that it will provide the functionality; by programming the apparatus or component so that it will provide the functionality; or through the use of some other suitable implementation technique. As one example, an integrated circuit may be fabricated to provide the requisite functionality. As another example, an integrated circuit may be fabricated to support the requisite functionality and then configured (e.g., via programming) to provide the requisite functionality. As yet another example, a processor circuit may execute code to provide the requisite functionality. 
     It should be understood that any reference to an element herein using a designation such as “first,” “second,” and so forth does not generally limit the quantity or order of those elements. Rather, these designations may be used herein as a convenient method of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements may be employed there or that the first element must precede the second element in some manner. Also, unless stated otherwise a set of elements may comprise one or more elements. In addition, terminology of the form “at least one of A, B, or C” or “one or more of A, B, or C” or “at least one of the group consisting of A, B, and C” used in the description or the claims means “A or B or C or any combination of these elements.” For example, this terminology may include A, or B, or C, or A and B, or A and C, or A and B and C, or 2A, or 2B, or 2C, and so on. 
     Those of skill in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof. 
     Further, those of skill in the art will appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the aspects disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure. 
     The methods, sequences and/or algorithms described in connection with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. 
     Accordingly, an aspect of the disclosure can include a computer readable medium embodying a method for dynamic bandwidth management for transmissions in unlicensed spectrum. Accordingly, the disclosure is not limited to the illustrated examples. 
     While the foregoing disclosure shows illustrative aspects, it should be noted that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the aspects of the disclosure described herein need not be performed in any particular order. Furthermore, although certain aspects may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.