WO2019090516A1 - Étalement d'identifiant de réseau radio - Google Patents

Étalement d'identifiant de réseau radio Download PDF

Info

Publication number
WO2019090516A1
WO2019090516A1 PCT/CN2017/109943 CN2017109943W WO2019090516A1 WO 2019090516 A1 WO2019090516 A1 WO 2019090516A1 CN 2017109943 W CN2017109943 W CN 2017109943W WO 2019090516 A1 WO2019090516 A1 WO 2019090516A1
Authority
WO
WIPO (PCT)
Prior art keywords
identifier
spread
bits
rnti
error detecting
Prior art date
Application number
PCT/CN2017/109943
Other languages
English (en)
Inventor
Gabi Sarkis
Jing Jiang
Kai Chen
Changlong Xu
Peter Gaal
Wanshi Chen
Tao Luo
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2017/109943 priority Critical patent/WO2019090516A1/fr
Publication of WO2019090516A1 publication Critical patent/WO2019090516A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

  • the following relates generally to wireless communication, and more specifically to radio network identifier spreading.
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • Examples of such multiple-access systems include fourth generation (4G) systems such as a Long Term Evolution (LTE) systems or LTE-Advanced (LTE-A) systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G fourth generation
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • 5G New Radio
  • a wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • UE user equipment
  • the base station may transmit a downlink control information (DCI) message over a Physical Downlink Control Channel (PDCCH) .
  • DCI downlink control information
  • PDCCH Physical Downlink Control Channel
  • the UE may be assigned a unique identifier (e.g., Radio Network Temporary Identifier (RNTI) ) to enable the UE to distinguish its PDCCH from a PDCCH for another UE.
  • RNTI Radio Network Temporary Identifier
  • a base station may mask error detecting check bits (e.g., cyclic redundancy check (CRC) bits) in the DCI message, using the RNTI.
  • CRC cyclic redundancy check
  • the UE may then utilize its RNTI to decode one or more PDCCH candidates, by demasking a PDCCH candidate’s CRC bits with the RNTI. For instance, the UE may test the DCI CRC using one or more masks generated from the RNTI. In some cases, if no CRC error is detected by the UE, the UE may determine that it is the intended recipient of the PDCCH. However, in some cases, a base station may assign sequential RNTIs to UEs, and a UE’s decoder may generate multiple candidates that pass the CRC mask for one or more RNTIs. In order to assist a UE successfully monitor and receive control information, a method for spreading sequential RNTIs may be beneficial.
  • a wireless device such as a base station may attempt to increase or maximize the Hamming distance between error check masks to assist a user equipment (UE) in decoding downlink control information (DCI) messages.
  • the wireless device may use a sparse error check mask. For example, ‘Y’ bits may be allocated for a radio network identifier used as the error check mask, where Y>X, while the number of valid radio network identifiers may be less than 2 Y (e.g., 2 X ) .
  • This technique may be referred to as radio network identifier spreading, and the radio network identifier may be referred to as a spread radio network identifier.
  • ‘X’ bits may be allocated for the radio network identifier, and more than ‘X’ bits for the error check mask (e.g., ‘Y’ bits where Y>X) .
  • ‘X’ bits may be allocated for the error check mask, and spreading techniques may be applied to spread radio network identifiers having ‘X’ bits that may otherwise be clustered. The described techniques may enhance the decoding procedure for a downlink control channel, and thus, UE performance.
  • a method of wireless communication may include receiving, at a UE, a control transmission comprising a candidate codeword generated from a control information vector and a set of error detecting check bits, identifying a spread identifier for the UE associated with the control transmission, performing a decoding operation on the candidate codeword to obtain a plurality of candidate paths, demasking respective sets of error detecting check bits for at least one candidate path of the plurality of candidate paths, comparing a generated set of error detecting check bits with the respective set of error detecting check bits for the at least one candidate path, and determining that the control information vector comprises control information for the UE based on a result of the comparison.
  • the apparatus may include means for receiving, at a UE, a control transmission comprising a candidate codeword generated from a control information vector and a set of error detecting check bits, means for identifying a spread identifier for the UE associated with the control transmission, means for performing a decoding operation on the candidate codeword to obtain a plurality of candidate paths, means for demasking respective sets of error detecting check bits for at least one candidate path of the plurality of candidate paths, means for comparing a generated set of error detecting check bits with the respective set of error detecting check bits for the at least one candidate path, and means for determining that the control information vector comprises control information for the UE based on a result of the comparison.
  • the apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory.
  • the instructions may be operable to cause the processor to receive, at a UE, a control transmission comprising a candidate codeword generated from a control information vector and a set of error detecting check bits, identify a spread identifier for the UE associated with the control transmission, perform a decoding operation on the candidate codeword to obtain a plurality of candidate paths, demask respective sets of error detecting check bits for at least one candidate path of the plurality of candidate paths, compare a generated set of error detecting check bits with the respective set of error detecting check bits for the at least one candidate path, and determine that the control information vector comprises control information for the UE based on a result of the comparison.
  • a non-transitory computer-readable medium for wireless communication may include instructions operable to cause a processor to receive, at a UE, a control transmission comprising a candidate codeword generated from a control information vector and a set of error detecting check bits, identify a spread identifier for the UE associated with the control transmission, perform a decoding operation on the candidate codeword to obtain a plurality of candidate paths, demask respective sets of error detecting check bits for at least one candidate path of the plurality of candidate paths, compare a generated set of error detecting check bits with the respective set of error detecting check bits for the at least one candidate path, and determine that the control information vector comprises control information for the UE based on a result of the comparison.
  • the spread identifier may have a bit length longer than a binary logarithm of a number of valid spread identifier values.
  • the identifying the spread identifier comprises: generating the spread identifier from an identifier associated with the control transmission having a first number of bits, wherein the spread identifier may have a second number of bits greater than the first number of bits.
  • the spread identifier may be generated using an encoding scheme.
  • the spread identifier may be generated by appending one or more cyclic error detecting check bits to the identifier.
  • the spread identifier may be generated by hashing the identifier using a truncated hash, and wherein the truncated hash may be a cryptographic hash.
  • the spread identifier may be generated using one or more of a cell-id, a zone-id, or a system frame number (SFN) .
  • SFN system frame number
  • the identifying the spread identifier comprises: generating the spread identifier by multiplying an identifier by a predetermined number, and selecting the spread identifier from the multiplied identifier.
  • the predetermined number may be a prime number.
  • the spread identifier may have a second number of bits greater than the first number of bits.
  • the spread identifier may have the first number of bits.
  • the identifier corresponds to a random access radio network temporary identifier (RA-RNTI) , a cell RNTI (C-RNTI) , a paging RNTI (P-RNTI) , a semi-persistent scheduling RNTI (SPS-RNTI) , or a system information RNTI (SI-RNTI) .
  • RA-RNTI random access radio network temporary identifier
  • C-RNTI cell RNTI
  • P-RNTI paging RNTI
  • SPS-RNTI semi-persistent scheduling RNTI
  • SI-RNTI system information RNTI
  • a method of wireless communication may include determining a spread identifier associated with a control transmission to a UE, determining a set of error detecting check bits for a control information vector associated with the control transmission, masking the set of error detecting check bits with the spread identifier, and transmitting a codeword determined from the control information vector and the masked set of error detecting check bits to the UE.
  • the apparatus may include means for determining a spread identifier associated with a control transmission to a UE, means for determining a set of error detecting check bits for a control information vector associated with the control transmission, means for masking the set of error detecting check bits with the spread identifier, and means for transmitting a codeword determined from the control information vector and the masked set of error detecting check bits to the UE.
  • the apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory.
  • the instructions may be operable to cause the processor to determine a spread identifier associated with a control transmission to a UE, determine a set of error detecting check bits for a control information vector associated with the control transmission, mask the set of error detecting check bits with the spread identifier, and transmit a codeword determined from the control information vector and the masked set of error detecting check bits to the UE.
  • a non-transitory computer-readable medium for wireless communication may include instructions operable to cause a processor to determine a spread identifier associated with a control transmission to a UE, determine a set of error detecting check bits for a control information vector associated with the control transmission, mask the set of error detecting check bits with the spread identifier, and transmit a codeword determined from the control information vector and the masked set of error detecting check bits to the UE.
  • the spread identifier may have a bit length longer than a binary logarithm of a number of valid spread identifier values.
  • the determining the spread identifier comprises: generating the spread identifier from an identifier associated with the control transmission having a first number of bits, wherein the spread identifier may have a second number of bits greater than the first number of bits.
  • the spread identifier may be generated using an encoding scheme.
  • the spread identifier may be generated by appending one or more cyclic error detecting check bits to the identifier.
  • the spread identifier may be generated by hashing the identifier using a truncated hash, and wherein the truncated hash may be a cryptographic hash.
  • the spread identifier may be determined using one or more of a zone-id, cell-id, or SFN.
  • the determining the spread identifier comprises: generating the spread identifier by multiplying an identifier having a first number of bits by a predetermined number.
  • Some examples of the method, apparatus, and non-transitory computer-readable medium described above may further include processes, features, means, or instructions for selecting the spread identifier from the multiplied identifier.
  • the predetermined number may be a prime number.
  • the spread identifier may have a second number of bits greater than the first number of bits.
  • the spread identifier may have the first number of bits.
  • the identifier corresponds to a RA-RNTI, a C-RNTI, a P-RNTI, a SPS-RNTI, or a SI-RNTI.
  • FIG. 1 illustrates an example of a system for wireless communication that supports RNTI Spreading in accordance with aspects of the present disclosure.
  • FIG. 2 illustrates an example of a wireless communication system that supports RNTI spreading in accordance with aspects of the present disclosure.
  • FIGs. 3A-3C illustrate examples of bit representations that support radio network identifier spreading in accordance with aspects of the present disclosure.
  • FIGs. 4A and 4B illustrate examples of process flows that support radio network identifier spreading in accordance with aspects of the present disclosure.
  • FIGs. 5 through 7 show block diagrams of a device that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • FIG. 8 illustrates a block diagram of a system including a UE that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • FIGs. 9 through 11 show block diagrams of a device that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • FIG. 12 illustrates a block diagram of a system including a base station that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • FIGs. 13 through 14 illustrate methods for radio network identifier spreading in accordance with aspects of the present disclosure.
  • a base station may transmit downlink control information (DCI) to a user equipment (UE) over a downlink control channel (e.g., a Physical Downlink Control Channel (PDCCH) ) .
  • DCI downlink control information
  • UE user equipment
  • a downlink control channel e.g., a Physical Downlink Control Channel (PDCCH)
  • the DCI may carry information enabling the UE to decode user data, such as an indication of resource blocks carrying data, demodulation scheme used to decode data, etc.
  • the base station may transmit multiple PDCCH’s in a single subframe, not all which may be relevant to the UE.
  • the UE may find the PDCCH specific to it by monitoring one or more PDCCH candidates in each subframe.
  • a base station may mask error detecting check bits (e.g., cyclic redundancy check (CRC) bits) in the DCI message, using an identifier, such as a Radio Network Temporary Identifier (RNTI) .
  • CRC cyclic redundancy check
  • RNTI Radio Network Temporary Identifier
  • the UE may utilize its RNTI (s) to decode one or more PDCCH candidates by demasking a PDCCH candidate’s CRC bits with the RNTI. For instance, the UE may test the DCI CRC using one or more masks generated from the RNTI. In some cases, if no CRC error is detected by the UE, the UE may determine that it is the intended recipient of the PDCCH.
  • CRC Radio Network Temporary Identifier
  • the UE’s decoder may generate multiple candidates that pass the CRC mask for both RNTIs. For instance, UEs may be assigned sequential RNTIs during random access procedures, which may be referred to as random access RNTIs (RA-RNTIs) .
  • RA-RNTIs random access RNTIs
  • Other examples of RNTIs may include a cell RNTI (C-RNTI) , paging RNTI (P-RNTI) , semi-persistent scheduling RNTI (SPS-RNTI) , or System Information (SI) RNTI (SI-RNTI) .
  • C-RNTI cell RNTI
  • P-RNTI paging RNTI
  • SPS-RNTI semi-persistent scheduling RNTI
  • SI-RNTI System Information
  • sequential or clustered RNTI values may occur in C-RNTIs, P-RNTIs, SPS-RNTIs, or SI-RNTIs.
  • the number of valid RNTI values may be based on the number of bits ‘X’ in the RNTI, and denoted by 2 X .
  • a base station may attempt to increase or maximize the Hamming distance between RNTIs to assist a UE in decoding DCI.
  • the base station may allocate ‘Y’ bits for the RNTI, where Y >X, while the number of valid RNTI values may be maintained at 2 X .
  • This technique may be referred to as RNTI spreading, and the RNTI may be referred to as a spread RNTI.
  • the CRC mask may be generated using the spread RNTI, and may be ‘Y’ bits in length.
  • ‘X’ bits may be allocated for the RNTI, while more than ‘X’ bits are used for the CRC mask.
  • the base station may utilize one or more techniques to spread the RNTI from ‘X’ bits to ‘Y’ bits. For instance, the base station may use a channel coding scheme to spread the RNTI. In some cases, the base station may use single parity bits or Bose-Chaudhuri-Hocquenghem (BCH) codes to spread the RNTI. In a second technique of RNTI spreading, an encoding scheme such as 8b10b may be utilized to maximize the Hamming distance between RNTIs. In a third technique, Y-X CRC bits may be appended to the RNTI to generate a CRC mask. In a fourth technique of RNTI spreading, a cryptographic hash may be used such as MD5 or SHA to generate the CRC mask.
  • BCH Bose-Chaudhuri-Hocquenghem
  • the hash may be truncated.
  • the RNTI may be multiplied by a predetermined or static number (e.g., 123) , following which a modulo operation may be formed.
  • the static number may be a prime number.
  • ‘Y’ bits may be selected to generate the mask from the multiplied identifier.
  • a cell-id, zone-id, system frame number (SFN) or a combination thereof, may be combined with a ‘X’ bit RNTI to generate a ‘Y’ bit mask, where Y >X. Similar to the techniques described above, the number of valid RNTI values may remain 2 X .
  • the base station may not increase the number of bits allocated to the RNTI, but may perform one or more operations on the RNTI to probabilistically increase the Hamming distance between RNTIs. For instance, the base station may allocate ‘X’ or more bits to the CRC mask generated from the RNTI. In some cases, the base station may utilize a zone-id, cell-id, or SFN to generate the RNTI mask from an ‘X’ bit RNTI. In some other cases, the X bit RNTI may be multiplied by a predetermined static number (e.g., a prime number or number selected based on typical clustering distance) , and ‘X’ bits may be selected from the multiplied RNTI.
  • a predetermined static number e.g., a prime number or number selected based on typical clustering distance
  • aspects of the disclosure are initially described in the context of a wireless communications system. Aspects are then described with respect to bit representations of network identifiers and process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to RNTI Spreading.
  • FIG. 1 illustrates an example of a wireless communications system 100 in accordance with various aspects of the present disclosure.
  • the wireless communications system 100 includes base stations 105, UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • NR New Radio
  • wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low-cost and low-complexity devices.
  • ultra-reliable e.g., mission critical
  • Base stations 105 may wirelessly communicate with UEs 115 via one or more base station antennas.
  • Base stations 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation Node B or giga-nodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or some other suitable terminology.
  • Wireless communications system 100 may include base stations 105 of different types (e.g., macro or small cell base stations) .
  • the UEs 115 described herein may be able to communicate with various types of base stations 105 and network equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like.
  • Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 is supported. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via communication links 125, and communication links 125 between a base station 105 and a UE 115 may utilize one or more carriers. Communication links 125 shown in wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions, from a base station 105 to a UE 115. Downlink transmissions may also be called forward link transmissions while uplink transmissions may also be called reverse link transmissions.
  • the geographic coverage area 110 for a base station 105 may be divided into sectors making up only a portion of the geographic coverage area 110, and each sector may be associated with a cell.
  • each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations thereof.
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, and overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous LTE/LTE-A or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.
  • the term “cell” refers to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) , and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) ) operating via the same or a different carrier.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., machine-type communication (MTC) , narrowband Internet-of-Things (NB-IoT) , enhanced mobile broadband (eMBB) , or others) that may provide access for different types of devices.
  • MTC machine-type communication
  • NB-IoT narrowband Internet-of-Things
  • eMBB enhanced mobile broadband
  • the term “cell” may refer to a portion of a geographic coverage area 110 (e.g., a sector) over which the logical entity operates.
  • UEs 115 may be dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile.
  • a UE 115 may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client.
  • a UE 115 may also be a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, or the like, which may be implemented in various articles such as appliances, vehicles, meters, or the like.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC massive machine type communications
  • Some UEs 115 may be low cost or low complexity devices, and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) .
  • M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application program that can make use of the information or present the information to humans interacting with the program or application.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) . In some examples half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for UEs 115 include entering a power saving “deep sleep” mode when not engaging in active communications, or operating over a limited bandwidth (e.g., according to narrowband communications) . In some cases, UEs 115 may be designed to support critical functions (e.g., mission critical functions) , and a wireless communications system 100 may be configured to provide ultra-reliable communications for these functions.
  • critical functions e.g., mission critical functions
  • a UE 115 may also be able to communicate directly with other UEs 115 (e.g., using a peer-to-peer (P2P) or device-to-device (D2D) protocol) .
  • P2P peer-to-peer
  • D2D device-to-device
  • One or more of a group of UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105, or be otherwise unable to receive transmissions from a base station 105.
  • groups of UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications.
  • D2D communications are carried out between UEs 115 without the involvement of a base
  • Base stations 105 may communicate with the core network 130 and with one another. For example, base stations 105 may interface with the core network 130 through backhaul links 132 (e.g., via an S1 or other interface) . Base stations 105 may communicate with one another over backhaul links 134 (e.g., via an X2 or other interface) either directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) .
  • backhaul links 132 e.g., via an S1 or other interface
  • backhaul links 134 e.g., via an X2 or other interface
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) , which may include at least one mobility management entity (MME) , at least one serving gateway (S-GW) , and at least one Packet Data Network (PDN) gateway (P-GW) .
  • the MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC.
  • User IP packets may be transferred through the S-GW, which itself may be connected to the P-GW.
  • the P-GW may provide IP address allocation as well as other functions.
  • the P-GW may be connected to the network operators IP services.
  • the operators IP services may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched (PS) Stream
  • At least some of the network devices may include subcomponents such as an access network entity, which may be an example of an access node controller (ANC) .
  • Each access network entity may communicate with UEs 115 through a number of other access network transmission entities, which may be referred to as a radio head, a smart radio head, or a transmission/reception point (TRP) .
  • TRP transmission/reception point
  • various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station 105) .
  • Wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 MHz to 300 GHz.
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features. However, the waves may penetrate structures sufficiently for a macro cell to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter range (e.g., less than 100 km) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • Wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band.
  • SHF region includes bands such as the 5 GHz industrial, scientific, and medical (ISM) bands, which may be used opportunistically by devices that can tolerate interference from other users.
  • ISM bands 5 GHz industrial, scientific, and medical bands
  • Wireless communications system 100 may also operate in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band.
  • EHF extremely high frequency
  • wireless communications system 100 may support millimeter wave (mmW) communications between UEs 115 and base stations 105, and EHF antennas of the respective devices may be even smaller and more closely spaced than UHF antennas. In some cases, this may facilitate use of antenna arrays within a UE 115.
  • mmW millimeter wave
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. Techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz ISM band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz ISM band.
  • wireless devices such as base stations 105 and UEs 115 may employ listen-before-talk (LBT) procedures to ensure a frequency channel is clear before transmitting data.
  • LBT listen-before-talk
  • operations in unlicensed bands may be based on a CA configuration in conjunction with CCs operating in a licensed band (e.g., LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these.
  • Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD) , time division duplexing (TDD) , or a combination of both.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • wireless communications system 100 may use a transmission scheme between a transmitting device (e.g., a base station 105) and a receiving device (e.g., a UE 115) , where the transmitting device is equipped with multiple antennas and the receiving devices are equipped with one or more antennas.
  • MIMO communications may employ multipath signal propagation to increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream, and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams.
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • MU-MIMO multiple-user MIMO
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or steer an antenna beam (e.g., a transmit beam or receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying certain amplitude and phase offsets to signals carried via each of the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • a base station 105 may use multiple antennas or antenna arrays to conduct beamforming operations for directional communications with a UE 115. For instance, some signals (e.g. synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station 105 multiple times in different directions, which may include a signal being transmitted according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105.
  • some signals e.g. synchronization signals, reference signals, beam selection signals, or other control signals
  • Transmissions in different beam directions may be used to identify (e.g., by the base station 105 or a receiving device, such as a UE 115) a beam direction for subsequent transmission and/or reception by the base station 105.
  • Some signals may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115) .
  • the beam direction associated with transmissions along a single beam direction may be determined based at least in in part on a signal that was transmitted in different beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions, and the UE 115 may report to the base station 105 an indication of the signal it received with a highest signal quality, or an otherwise acceptable signal quality.
  • a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) , or transmitting a signal in a single direction (e.g., for transmitting data to a receiving device) .
  • a receiving device may try multiple receive beams when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at a plurality of antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive beams or receive directions.
  • a receiving device may use a single receive beam to receive along a single beam direction (e.g., when receiving a data signal) .
  • the single receive beam may be aligned in a beam direction determined based at least in part on listening according to different receive beam directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio, or otherwise acceptable signal quality based at least in part on listening according to multiple beam directions) .
  • the antennas of a base station 105 or UE 115 may be located within one or more antenna arrays, which may support MIMO operations, or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • wireless communications system 100 may be a packet-based network that operate according to a layered protocol stack.
  • PDCP Packet Data Convergence Protocol
  • a Radio Link Control (RLC) layer may in some cases perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer to improve link efficiency.
  • HARQ hybrid automatic repeat request
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • PHY Physical
  • UEs 115 and base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • HARQ feedback is one technique of increasing the likelihood that data is received correctly over a communication link 125.
  • HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., signal-to-noise conditions) .
  • a wireless device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • the radio frames may be identified by a system frame number (SFN) ranging from 0 to 1023.
  • SFN system frame number
  • Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms.
  • a subframe may be further divided into 2 slots each having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods.
  • a subframe may be the smallest scheduling unit of the wireless communications system 100, and may be referred to as a transmission time interval (TTI) .
  • TTI transmission time interval
  • a smallest scheduling unit of the wireless communications system 100 may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) or in selected component carriers using sTTIs) .
  • a slot may further be divided into multiple mini-slots containing one or more symbols.
  • a symbol of a mini-slot or a mini-slot may be the smallest unit of scheduling.
  • Each symbol may vary in duration depending on the subcarrier spacing or frequency band of operation, for example.
  • some wireless communications systems may implement slot aggregation in which multiple slots or mini-slots are aggregated together and used for communication between a UE 115 and a base station 105.
  • carrier refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over a communication link 125.
  • a carrier of a communication link 125 may include a portion of a radio frequency spectrum band that is operated according to physical layer channels for a given radio access technology.
  • Each physical layer channel may carry user data, control information, or other signaling.
  • a carrier may be associated with a pre-defined frequency channel (e.g., an E-UTRA absolute radio frequency channel number (EARFCN) ) , and may be positioned according to a channel raster for discovery by UEs 115.
  • E-UTRA absolute radio frequency channel number E-UTRA absolute radio frequency channel number
  • Carriers may be downlink or uplink (e.g., in an FDD mode) , or be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
  • signal waveforms transmitted over a carrier may be made up of multiple sub-carriers (e.g., using multi-carrier modulation (MCM) techniques such as OFDM or DFT-s-OFDM) .
  • MCM multi-carrier modulation
  • the organizational structure of the carriers may be different for different radio access technologies (e.g., LTE, LTE-A, NR, etc. ) .
  • communications over a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling to support decoding the user data.
  • a carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc. ) and control signaling that coordinates operation for the carrier.
  • acquisition signaling e.g., synchronization signals or system information, etc.
  • control signaling that coordinates operation for the carrier.
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • control information transmitted in a physical control channel may be distributed between different control regions in a cascaded manner (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces) .
  • a carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a number of predetermined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) .
  • each served UE 115 may be configured for operating over portions or all of the carrier bandwidth.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .
  • a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g., “in-band” deployment of a narrowband protocol type) .
  • a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme) .
  • the more resource elements that a UE 115 receives and the higher the order of the modulation scheme the higher the data rate may be for the UE 115.
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers) , and the use of multiple spatial layers may further increase the data rate for communications with a UE 115.
  • a spatial resource e.g., spatial layers
  • Devices of the wireless communications system 100 may have a hardware configuration that supports communications over a particular carrier bandwidth, or may be configurable to support communications over one of a set of carrier bandwidths.
  • the wireless communications system 100 may include base stations 105 and/or UEs that can support simultaneous communications via carriers associated with more than one different carrier bandwidth.
  • Wireless communications system 100 may support communication with a UE 115 on multiple cells or carriers, a feature which may be referred to as carrier aggregation (CA) or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink CCs and one or more uplink CCs according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both FDD and TDD component carriers.
  • wireless communications system 100 may utilize enhanced component carriers (eCCs) .
  • eCC may be characterized by one or more features including wider carrier or frequency channel bandwidth, shorter symbol duration, shorter TTI duration, or modified control channel configuration.
  • an eCC may be associated with a carrier aggregation configuration or a dual connectivity configuration (e.g., when multiple serving cells have a suboptimal or non-ideal backhaul link) .
  • An eCC may also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is allowed to use the spectrum) .
  • An eCC characterized by wide carrier bandwidth may include one or more segments that may be utilized by UEs 115 that are not capable of monitoring the whole carrier bandwidth or are otherwise configured to use a limited carrier bandwidth (e.g., to conserve power) .
  • an eCC may utilize a different symbol duration than other CCs, which may include use of a reduced symbol duration as compared with symbol durations of the other CCs.
  • a shorter symbol duration may be associated with increased spacing between adjacent subcarriers.
  • a device such as a UE 115 or base station 105, utilizing eCCs may transmit wideband signals (e.g., according to frequency channel or carrier bandwidths of 20, 40, 60, 80 MHz, etc. ) at reduced symbol durations (e.g., 16.67 microseconds) .
  • a TTI in eCC may consist of one or multiple symbol periods. In some cases, the TTI duration (that is, the number of symbol periods in a TTI) may be variable.
  • Wireless communications systems such as an NR system may utilize any combination of licensed, shared, and unlicensed spectrum bands, among others.
  • the flexibility of eCC symbol duration and subcarrier spacing may allow for the use of eCC across multiple spectrums.
  • NR shared spectrum may increase spectrum utilization and spectral efficiency, specifically through dynamic vertical (e.g., across frequency) and horizontal (e.g., across time) sharing of resources.
  • Wireless communication system 100 illustrates aspects of radio network identifier spreading between UEs 115, base stations 105, core network 130, or some combination.
  • UEs 115, base stations 105, and/or other devices may use one or more techniques described in accordance with various aspects of the present disclosure to spread radio network identifiers, including expanding bit length of CRC masks and/or expanding bit length of the identifier itself (i.e., while maintaining the same number of valid identifier values) , to facilitate more efficient and effective monitoring of control information.
  • FIG. 2 illustrates an example of a wireless communication system 200 that supports radio network identifier spreading in accordance with various aspects of the present disclosure.
  • wireless communication system 200 may implement aspects of wireless communication system 100.
  • the wireless communication system 200 may include UEs 115-a and 115-b, and a base station 105-a, which may be examples of the UE 115 and base station 105 described with reference to FIG. 1.
  • UEs 115-a and 115-b may communicate with base station 105-a, via communication links 125-a and 125-b, respectively.
  • Wireless communication system 200 may operate in various spectrum bands including licensed, unlicensed, shared, and mmW spectrum.
  • base station 105-a may transmit DCI messages to UEs 115-a and 115-b over a PDCCH.
  • the DCI may carry information enabling the UEs to decode user data, such as an indication of resource blocks carrying data, demodulation scheme used to decode data, etc.
  • base station 105-a may mask error detecting check bits (e.g., CRC bits) in the DCI message, using an identifier, such as a RNTI.
  • CRC bits error detecting check bits
  • the UE 115-a may utilize its RNTI to decode one or more DCI candidates by demasking a DCI candidate’s CRC bits with the RNTI. For instance, the UE 115-a may test the DCI CRC using one or more masks generated from its RNTI. In some cases, if no CRC error is detected by the UE 115-a, the UE 115-a may determine that it is the intended recipient of the DCI.
  • UEs 115-a and 115-b may be assigned sequential RNTIs or RNTIs that differ in only a few bits (e.g., RA-RNTIs, P-RNTIs, C-RNTIs, SPS-RNTIs, or SI-RNTIs) .
  • the UE’s decoder may generate multiple candidates that pass the CRC mask for both RNTIs. Such erroneous decoding may impact UE performance, and increase latency.
  • base station 105-a may attempt to increase or maximize the Hamming distance between RNTIs to assist the UEs 115-a and 115-b in decoding their respective DCI messages.
  • the base station 105-a may allocate ‘Y’ bits for the RNTI, where Y >X, while the number of valid RNTI values may be maintained at 2 X .
  • This technique may be referred to as RNTI spreading, and the RNTI may be referred to as a spread RNTI.
  • ‘X’ bits may be allocated for the RNTI, while more than ‘X’ bits are used for the CRC mask.
  • the base station 105-a may utilize one or more techniques to spread the RNTI from ‘X’ bits to ‘Y’ bits. For instance, the base station 105-a may use a channel coding scheme to spread the RNTI. In some cases, the base station 105-a may use single parity bits or Bose-Chaudhuri-Hocquenghem (BCH) codes to spread the RNTI. For instance, the base station 105-a may append a single parity check bit to ‘X’ bit RNTI, to spread it to ‘X+1’ bits in length.
  • BCH Bose-Chaudhuri-Hocquenghem
  • an encoding scheme such as 8b10b may be utilized to maximize the Hamming distance between RNTIs.
  • base station 105-a may append ‘Y-X’ CRC bits to the RNTI to generate a CRC mask.
  • base station 105-a may utilize a cryptographic hash (e.g., MD5 hash, SHA hash, etc. ) to generate the CRC mask, and may use a truncated form where the hash is greater than ‘Y’ bits.
  • a cryptographic hash e.g., MD5 hash, SHA hash, etc.
  • the RNTI may be multiplied by a predetermined or static number to generate a multiplied identifier of length Y or more bits.
  • the static number may be a prime number.
  • ‘Y’ bits may be selected from the multiplied identifier to generate the mask.
  • a cell-id, zone-id, system frame number (SFN) or a combination thereof, may be combined with a ‘X’ bit RNTI to generate a ‘Y’ bit mask, where Y >X. Similar to the techniques described above, the number of valid RNTI values may remain 2 X .
  • the base station 105-a may not increase the number of bits allocated to the RNTI, but may perform one or more operations on the RNTI to probabilistically increase the Hamming distance between RNTIs. For instance, the base station 105-a may use the same number of bits for the CRC mask as the RNTI. In some cases, the base station 105-a may utilize a zone-id, cell-id, or SFN to generate the RNTI mask from an ‘X’ bit RNTI. In some other cases, the X bit RNTI may be multiplied by a static number (e.g., prime number or number selected to distribute clustered numbers a desired amount) , and ‘X’ bits may be selected from the multiplied RNTI.
  • a static number e.g., prime number or number selected to distribute clustered numbers a desired amount
  • error detecting check bits may be distributed over the control information vector (i.e., information bits encoded to form the codeword associated with a DCI message) , and may have a bit length longer than the RNTI or the mask.
  • FIGs. 3A, 3B, and 3C illustrate examples of bit representations 301, 302, and 303 that support radio network identifier spreading in accordance with various aspects of the present disclosure.
  • bit representations 301-303 may implement aspects of wireless communication system 100.
  • Bit representations 301-303 illustrate RNTI spreading through bit arrays of RNTIs and CRC masks generated from the RNTIs.
  • a UE may receive the control transmission comprising a candidate codeword generated from a control information vector and the set of error detecting check bits (i.e., masked CRC bits) .
  • the UE may identify the spread RNTI associated with the control transmission.
  • the UE may perform a decoding operation (e.g., list decoding operation) on the candidate codeword to obtain one or more candidate paths.
  • each of the one or more candidate paths may be a different decoding hypothesis generated from the received codeword.
  • the UE may compare the generated set of error detecting check bits for at least one candidate path, with the set of error detecting check bits received in the candidate codeword. If no error is detected, the UE may establish that the control information vector comprises control information for the UE.
  • Bit vector 305-a may represent an ‘X’ bit RNTI.
  • X is 16 bits.
  • X may be any other number, for example, depending on network implementation.
  • a CRC mask may be generated using the RNTI, to mask CRC bits in the PDCCH transmission carrying the DCI message.
  • the CRC bits may be distributed through the control information vector, and the CRC field may have a combined bit length longer than either or both of the RNTI and mask.
  • a spread RNTI may be used directly as the mask (not shown) .
  • the length of the RNTI may be increased to Y bits, where Y >X, while the number of valid RNTI values may remain at 2 X .
  • a receiving UE may demask a DCI candidate’s CRC using the RNTI, to determine if it is the intended recipient of the DCI.
  • a base station may spread an ‘X’ bit RNTI 305-a from X bits to Y bits, where Y >X, by appending a spreading value 315.
  • Spreading value 315 may be, for example, at least a portion of a cell identifier, zone identifier, subframe number (SFN) , or other value.
  • Spreading value 315 may also be a CRC value or one or more parity bits generated from the ‘X’ bit RNTI 305-a.
  • the base station may use the resulting ‘Y’ bit mask 310-a for masking at least a portion of the CRC value, and the UE may demask the CRC field in the DCI message with the ‘Y’ bit mask 310-a.
  • Bit vector 305-b may represent an X-bit RNTI for DCI transmissions for a UE.
  • the Hamming distance between bit masks may be increased by RNTI spreading to generate a ‘Y’ bit mask, where Y>X.
  • Y-bit mask 310-b is generated from the ‘X’ bit RNTI 305-b, for example by using a spreading technique such as channel coding, a BCH code, a cryptographic hash, or multiplication by a predetermined number (e.g., prime number) .
  • spreading may be used without the mask having an increased length over the RNTI. That is, an ‘X’ bit RNTI may be used to generate an ‘X’ bit mask, as illustrated in FIG. 3C.
  • Bit vector 305-c may represent a ‘X’ bit RNTI, and the ‘X’ bit mask 310-c may be generated by multiplying the RNTI with a static number (e.g., a prime number or number otherwise selected to increase the Hamming distance of clustered RNTI values) .
  • a modulo operation may be performed by choosing ‘X’ bits from the multiplied identifier to generate the mask 310-c.
  • the UE may perform decoding and demasking operations to determine if the control information is for the UE.
  • the bit representations for the RNTIs and masks illustrated in FIGs. 3A-3C are merely examples, and other RNTIs and masks may be used.
  • FIGs. 4A and 4B illustrates examples of process flows 401 and 402 that support radio network identifier spreading in accordance with various aspects of the present disclosure.
  • process flows 401 and 402 may implement aspects of wireless communication system 100.
  • the process flows 401 and 402 may be implemented by a UE 115 or a base station 105 as described with reference to FIGs. 1 and 2.
  • the process illustrated by flow diagrams 401 and 402 may be implemented in a wireless system deploying NR.
  • FIG. 4A illustrates an example of a process flow to demask CRC bits and decode a DCI message from a receiving device (e.g., UE) perspective.
  • a UE may receive a control transmission comprising a candidate codeword generated from a control information vector 415-a and a set of error detecting check bits (e.g., CRC bits 420) .
  • the UE may identify a spread identifier associated with the control transmission.
  • the spread identifier may have ‘Y’ bits that represent a spread value from 2 X available values.
  • the spread RNTI 405-b may be ‘Y’ bits with less than 2 Y available RNTI values (e.g., 2 X available values) used, or the spread RNTI may be ‘Y’ bits generated from an ‘X’ -bit RNTI 405-a by spreading 410-a.
  • the UE 115 may utilize the spread identifier in demasking the CRC bits. For instance, the UE may perform a decoding operation (e.g., list decoding) on the candidate codeword received in the control transmission to obtain one or more candidate paths (shown by control vector 415-a and CRC 420 for one of the candidates paths) .
  • a decoding operation e.g., list decoding
  • the UE may then demask respective sets of error detecting check bits for at least one candidate path of the one or more candidate paths using demasking function 440-a (e.g., an XOR operation) and generate a CRC value for the at least one candidate path using CRC function 425.
  • the UE may then compare a set of the generated error detecting check bits 430-b with the respective set of demasked error detecting check bits 430-a received in the candidate DCI message for the at least one candidate path (i.e., comparison of 430-a and 430-b) , to determine if it is the intended recipient of the control information.
  • FIG. 4B illustrates an example of a process flow to generate spread identifiers, and mask error detecting check bits (e.g., CRC bits) for a control information vector 415-b from the perspective of a transmitter (e.g., a base station transmitting a DCI message) .
  • a base station may determine a spread identifier (e.g., spread RNTI 405-d, or, by performing spreading 410-b on RNTI 405-c) and may use a CRC function 435 to generate a set of error detecting check bits (e.g., CRC bits 445) associated with a control transmission.
  • the base station may spread RNTI 405-c via one or more of the techniques described above, with reference to FIGs. 1-3. For instance, the base station may generate the spread identifier having ‘Y’ bits from an identifier having ‘X’ number of bits. In some cases, Y > N, and the spread identifier may have a bit length longer than a binary logarithm of a number of valid spread identifier values (2 X ) .
  • the spread identifier may be generated from the identifier using one of an encoding scheme, appending one or more CRC bits to the identifier, hashing the identifier using a truncated cryptographic hash, multiplying the identifier by a static number (e.g., prime number or number selected to increase the Hamming distance between clustered RNTI values) and performing a modulo operation.
  • ‘Y’ may be equal to ‘X’
  • spreading 410-b may be used to spread clustered RNTI values while still outputting the same number of bits as the RNTI 405-c.
  • the base station may then generate a mask using the spread identifier, which may be used to mask CRC bits 445 of a DCI message using masking function 440-b (e.g., an XOR operation) .
  • masking function 440-b e.g., an XOR operation
  • spread RNTI 405-d may be used as the mask, where spread RNTI 405-d has a greater number of bits than a binary logarithm of the number of available RNTI values.
  • the base station may transmit a codeword determined from the control information vector 415-b and the masked set of CRC bits 450 (i.e., masked using the spread identifier) to a UE.
  • FIG. 5 shows a block diagram 500 of a wireless device 505 that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • Wireless device 505 may be an example of aspects of a user equipment (UE) 115 as described herein.
  • Wireless device 505 may include receiver 510, UE communications manager 515, and transmitter 520.
  • Wireless device 505 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • Receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to Radio Network Identifier Spreading, etc. ) . Information may be passed on to other components of the device.
  • the receiver 510 may be an example of aspects of the transceiver 835 described with reference to FIG. 8.
  • the receiver 510 may utilize a single antenna or a set of antennas.
  • Receiver 510 may receive, at a UE, a control transmission including a candidate codeword generated from a control information vector and a set of error detecting check bits.
  • UE communications manager 515 may be an example of aspects of the UE communications manager 515 described with reference to FIG. 8.
  • UE communications manager 515 and/or at least some of its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of the UE communications manager 515 and/or at least some of its various sub-components may be executed by a general-purpose processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , an field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • the UE communications manager 515 and/or at least some of its various sub-components may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical devices.
  • UE communications manager 515 and/or at least some of its various sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • UE communications manager 515 and/or at least some of its various sub-components may be combined with one or more other hardware components, including but not limited to an I/O component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • UE communications manager 515 may identify a spread identifier for the UE associated with the control transmission, perform a decoding operation on the candidate codeword to obtain a set of candidate paths, demask respective sets of error detecting check bits for at least one candidate path of the set of candidate paths, compare a generated set of error detecting check bits with the respective set of error detecting check bits for the at least one candidate path, and determine that the control information vector includes control information for the UE based on a result of the comparison.
  • Transmitter 520 may transmit signals generated by other components of the device.
  • the transmitter 520 may be collocated with a receiver 510 in a transceiver.
  • the transmitter 520 may be an example of aspects of the transceiver 835 described with reference to FIG. 8.
  • the transmitter 520 may utilize a single antenna or a set of antennas.
  • FIG. 6 shows a block diagram 600 of a wireless device 605 that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • Wireless device 605 may be an example of aspects of a wireless device 505 or a UE 115 as described with reference to FIG. 5.
  • Wireless device 605 may include receiver 610, UE communications manager 615, and transmitter 620.
  • Wireless device 605 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • Receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to Radio Network Identifier Spreading, etc. ) . Information may be passed on to other components of the device.
  • the receiver 610 may be an example of aspects of the transceiver 835 described with reference to FIG. 8.
  • the receiver 610 may utilize a single antenna or a set of antennas.
  • UE communications manager 615 may be an example of aspects of the UE communications manager 515 described with reference to FIG. 5.
  • UE communications manager 515 may also include RNTI component 625 and decoder 630.
  • RNTI component 625 may identify a spread identifier for the UE associated with the control transmission.
  • the identifying the spread identifier includes: generating the spread identifier from an identifier associated with the control transmission having a first number of bits, where the spread identifier has a second number of bits greater than the first number of bits.
  • the spread identifier is generated using an encoding scheme.
  • the spread identifier is generated by appending one or more cyclic error detecting check bits to the identifier.
  • the spread identifier has a bit length longer than a binary logarithm of a number of valid spread identifier values.
  • the spread identifier is generated using one or more of a cell-id, a zone-id, or a SFN.
  • the identifying the spread identifier includes: generating the spread identifier by multiplying an identifier having a first number of bits by a predetermined number, and selecting the spread identifier from the multiplied identifier.
  • the predetermined number is a prime number.
  • the spread identifier has a second number of bits greater than the first number of bits.
  • the spread identifier has the first number of bits.
  • the spread identifier is generated by hashing the identifier using a cryptographic hash (e.g., truncated cryptographic hash) .
  • Decoder 630 may perform a decoding operation on the candidate codeword to obtain a set of candidate paths, demask respective sets of error detecting check bits for at least one candidate path of the set of candidate paths, compare a generated set of error detecting check bits with the respective set of error detecting check bits for the at least one candidate path, and determine that the control information vector includes control information for the UE based on a result of the comparison.
  • Transmitter 620 may transmit signals generated by other components of the device.
  • the transmitter 620 may be collocated with a receiver 610 in a transceiver.
  • the transmitter 620 may be an example of aspects of the transceiver 835 described with reference to FIG. 8.
  • the transmitter 620 may utilize a single antenna or a set of antennas.
  • FIG. 7 shows a block diagram 700 of a UE communications manager 715 that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • the UE communications manager 715 may be an example of aspects of a UE communications manager 515, a UE communications manager 615, or a UE communications manager 815 described with reference to FIGs. 5, 6, and 8.
  • the UE communications manager 715 may include RNTI component 720 and decoder 725. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • RNTI component 720 may identify a spread identifier for the UE associated with the control transmission.
  • the identifying the spread identifier includes: generating the spread identifier from an identifier associated with the control transmission having a first number of bits, where the spread identifier has a second number of bits greater than the first number of bits.
  • the spread identifier is generated using an encoding scheme.
  • the spread identifier is generated by appending one or more cyclic error detecting check bits to the identifier.
  • the spread identifier has a bit length longer than a binary logarithm of a number of valid spread identifier values.
  • the spread identifier is generated using one or more of a cell-id, a zone-id, or a SFN.
  • the identifying the spread identifier includes: generating the spread identifier by multiplying an identifier having a first number of bits by a predetermined number, and selecting the spread identifier from the multiplied identifier.
  • the predetermined number is a prime number.
  • the spread identifier has a second number of bits greater than the first number of bits.
  • the spread identifier has the first number of bits.
  • the spread identifier is generated by hashing the identifier using a truncated hash, and where the truncated hash is a cryptographic hash.
  • Decoder 725 may perform a decoding operation on the candidate codeword to obtain a set of candidate paths, demask respective sets of error detecting check bits for at least one candidate path of the set of candidate paths, compare a generated set of error detecting check bits with the respective set of error detecting check bits for the at least one candidate path, and determine that the control information vector includes control information for the UE based on a result of the comparison.
  • FIG. 8 shows a diagram of a system 800 including a device 805 that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • Device 805 may be an example of or include the components of wireless device 505, wireless device 605, or a UE 115 as described above, e.g., with reference to FIGs. 5 and 6.
  • Device 805 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including UE communications manager 815, processor 820, memory 825, software 830, transceiver 835, antenna 840, and I/O controller 845. These components may be in electronic communication via one or more buses (e.g., bus 810) .
  • Device 805 may communicate wirelessly with one or more base stations 105.
  • Processor 820 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a central processing unit (CPU) , a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • processor 820 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into processor 820.
  • Processor 820 may be configured to execute computer-readable instructions stored in a memory to perform various functions (e.g., functions or tasks supporting Radio Network Identifier Spreading) .
  • Memory 825 may include random access memory (RAM) and read only memory (ROM) .
  • the memory 825 may store computer-readable, computer-executable software 830 including instructions that, when executed, cause the processor to perform various functions described herein.
  • the memory 825 may contain, among other things, a basic input/output system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • BIOS basic input/output system
  • Software 830 may include code to implement aspects of the present disclosure, including code to support Radio Network Identifier Spreading.
  • Software 830 may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, the software 830 may not be directly executable by the processor but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • Transceiver 835 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 835 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 835 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 840. However, in some cases the device may have more than one antenna 840, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • I/O controller 845 may manage input and output signals for device 805. I/O controller 845 may also manage peripherals not integrated into device 805. In some cases, I/O controller 845 may represent a physical connection or port to an external peripheral. In some cases, I/O controller 845 may utilize an operating system such as or another known operating system. In other cases, I/O controller 845 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, I/O controller 845 may be implemented as part of a processor. In some cases, a user may interact with device 805 via I/O controller 845 or via hardware components controlled by I/O controller 845.
  • FIG. 9 shows a block diagram 900 of a wireless device 905 that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • Wireless device 905 may be an example of aspects of a base station 105 as described herein.
  • Wireless device 905 may include receiver 910, base station communications manager 915, and transmitter 920.
  • Wireless device 905 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • Receiver 910 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to Radio Network Identifier Spreading, etc. ) . Information may be passed on to other components of the device.
  • the receiver 910 may be an example of aspects of the transceiver 1235 described with reference to FIG. 12.
  • the receiver 910 may utilize a single antenna or a set of antennas.
  • Base station communications manager 915 may be an example of aspects of the base station communications manager 1215 described with reference to FIG..
  • Base station communications manager 915 and/or at least some of its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of the base station communications manager 915 and/or at least some of its various sub-components may be executed by a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • the base station communications manager 915 and/or at least some of its various sub-components may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical devices.
  • base station communications manager 915 and/or at least some of its various sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure. In other examples, base station communications manager 915 and/or at least some of its various sub-components may be combined with one or more other hardware components, including but not limited to an I/O component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • Base station communications manager 915 may determine a spread identifier associated with a control transmission to a UE, determine a set of error detecting check bits for a control information vector associated with the control transmission, and mask the set of error detecting check bits with the spread identifier.
  • Transmitter 920 may transmit signals generated by other components of the device.
  • the transmitter 920 may be collocated with a receiver 910 in a transceiver module.
  • the transmitter 920 may be an example of aspects of the transceiver 1235 described with reference to FIG. 12.
  • the transmitter 920 may utilize a single antenna or a set of antennas.
  • Transmitter 920 may transmit a codeword determined from the control information vector and the masked set of error detecting check bits to the UE.
  • FIG. 10 shows a block diagram 1000 of a wireless device 1005 that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • Wireless device 1005 may be an example of aspects of a wireless device 905 or a base station 105 as described with reference to FIG. 9.
  • Wireless device 1005 may include receiver 1010, base station communications manager 1015, and transmitter 1020.
  • Wireless device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • Receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to Radio Network Identifier Spreading, etc. ) . Information may be passed on to other components of the device.
  • the receiver 1010 may be an example of aspects of the transceiver 1235 described with reference to FIG. 12.
  • the receiver 1010 may utilize a single antenna or a set of antennas.
  • Base station communications manager 1015 may be an example of aspects of the base station communications manager 1215 described with reference to FIG. 12.
  • Base station communications manager 1015 may also include RNTI component 1025, cyclic redundancy check (CRC) component 1030, and masking component 1035.
  • RNTI component 1025 may also include RNTI component 1025, cyclic redundancy check (CRC) component 1030, and masking component 1035.
  • CRC cyclic redundancy check
  • RNTI component 1025 may determine a spread identifier associated with a control transmission to a UE.
  • the spread identifier has the first number of bits.
  • the determining the spread identifier includes: generating the spread identifier from an identifier associated with the control transmission having a first number of bits, where the spread identifier has a second number of bits greater than the first number of bits.
  • the spread identifier is generated using an encoding scheme.
  • the spread identifier is generated by appending one or more cyclic error detecting check bits to the identifier.
  • the spread identifier is generated by hashing the identifier using a truncated hash, and where the truncated hash is a cryptographic hash.
  • the spread identifier has a bit length longer than a binary logarithm of a number of valid spread identifier values.
  • the determining the spread identifier includes: generating the spread identifier by multiplying an identifier having a first number of bits by a predetermined number and select the spread identifier from the multiplied identifier.
  • the predetermined number is a prime number.
  • the spread identifier has a second number of bits greater than the first number of bits.
  • the spread identifier is determined using one or more of a zone-id, cell-id, or SFN.
  • CRC component 1030 may determine a set of error detecting check bits for a control information vector associated with the control transmission.
  • Masking component 1035 may mask the set of error detecting check bits with the spread identifier.
  • Transmitter 1020 may transmit signals generated by other components of the device.
  • the transmitter 1020 may be collocated with a receiver 1010 in a transceiver module.
  • the transmitter 1020 may be an example of aspects of the transceiver 1235 described with reference to FIG. 12.
  • the transmitter 1020 may utilize a single antenna or a set of antennas.
  • FIG. 11 shows a block diagram 1100 of a base station communications manager 1115 that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • the base station communications manager 1115 may be an example of aspects of a base station communications manager 1215 described with reference to FIGs. 9, 10, and 12.
  • the base station communications manager 1115 may include RNTI component 1120, CRC component 1125, and masking component 1130. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • RNTI component 1120 may determine a spread identifier associated with a control transmission to a UE.
  • the spread identifier has the first number of bits.
  • the determining the spread identifier includes: generating the spread identifier from an identifier associated with the control transmission having a first number of bits, where the spread identifier has a second number of bits greater than the first number of bits.
  • the spread identifier is generated using an encoding scheme.
  • the spread identifier is generated by appending one or more cyclic error detecting check bits to the identifier.
  • the spread identifier is generated by hashing the identifier using a truncated hash, and where the truncated hash is a cryptographic hash. In some cases, the spread identifier has a bit length longer than a binary logarithm of a number of valid spread identifier values.
  • the determining the spread identifier includes: generating the spread identifier by multiplying an identifier having a first number of bits by a predetermined number and select the spread identifier from the multiplied identifier.
  • the predetermined number is a prime number.
  • the spread identifier has a second number of bits greater than the first number of bits.
  • the spread identifier is determined using one or more of a zone-id, cell-id, or SFN.
  • CRC component 25 may determine a set of error detecting check bits for a control information vector associated with the control transmission.
  • Masking component 1130 may mask the set of error detecting check bits with the spread identifier.
  • FIG. 12 shows a diagram of a system 1200 including a device 1205 that supports radio network identifier spreading in accordance with aspects of the present disclosure.
  • Device 1205 may be an example of or include the components of base station 105 as described above, e.g., with reference to FIG. 1.
  • Device 1205 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including base station communications manager 1215, processor 1220, memory 1225, software 1230, transceiver 1235, antenna 1240, network communications manager 1245, and inter-station communications manager 1250. These components may be in electronic communication via one or more buses (e.g., bus 1210) .
  • Device 1205 may communicate wirelessly with one or more UEs 115.
  • Processor 1220 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • processor 1220 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into processor 1220.
  • Processor 1220 may be configured to execute computer-readable instructions stored in a memory to perform various functions (e.g., functions or tasks supporting Radio Network Identifier Spreading) .
  • Memory 1225 may include RAM and ROM.
  • the memory 1225 may store computer-readable, computer-executable software 1230 including instructions that, when executed, cause the processor to perform various functions described herein.
  • the memory 1225 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • Software 1230 may include code to implement aspects of the present disclosure, including code to support Radio Network Identifier Spreading.
  • Software 1230 may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, the software 1230 may not be directly executable by the processor but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • Transceiver 1235 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 1235 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1235 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 1240. However, in some cases the device may have more than one antenna 1240, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • Network communications manager 1245 may manage communications with the core network (e.g., via one or more wired backhaul links) .
  • the network communications manager 1245 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • Inter-station communications manager 1250 may manage communications with other base station 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1250 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, inter-station communications manager 1250 may provide an X2 interface within an LTE/LTE-A wireless communication network technology to provide communication between base stations 105.
  • FIG. 13 shows a flowchart illustrating a method 1300 for radio network identifier spreading in accordance with aspects of the present disclosure.
  • the operations of method 1300 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1300 may be performed by a UE communications manager as described with reference to FIGs. 5 through 8.
  • a UE 115 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the UE 115 may perform aspects of the functions described below using special-purpose hardware.
  • the UE 115 may receive a control transmission comprising a candidate codeword generated from a control information vector and a set of error detecting check bits.
  • the operations of 1305 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1305 may be performed by a receiver as described with reference to FIGs. 5 through 8.
  • the UE 115 may identify a spread identifier for the UE associated with the control transmission.
  • the operations of 1310 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1310 may be performed by a RNTI component as described with reference to FIGs. 5 through 8.
  • the UE 115 may perform a decoding operation on the candidate codeword to obtain one or more candidate paths.
  • the operations of 1315 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1315 may be performed by a decoder as described with reference to FIGs. 5 through 8.
  • the UE 115 may demask respective sets of error detecting check bits for at least one candidate path of the one or more candidate paths.
  • the operations of 1320 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1320 may be performed by a decoder as described with reference to FIGs. 5 through 8.
  • the UE 115 may compare a generated set of error detecting check bits with the respective set of error detecting check bits for the at least one candidate path.
  • the operations of 1325 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1325 may be performed by a decoder as described with reference to FIGs. 5 through 8.
  • the UE 115 may determine that the control information vector comprises control information for the UE based on a result of the comparison.
  • the operations of 1330 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1330 may be performed by a decoder as described with reference to FIGs. 5 through 8.
  • FIG. 14 shows a flowchart illustrating a method 1400 for radio network identifier spreading in accordance with aspects of the present disclosure.
  • the operations of method 1400 may be implemented by a base station 105 or its components as described herein.
  • the operations of method 1400 may be performed by a base station communications manager as described with reference to FIGs. 9 through 12.
  • a base station 105 may execute a set of codes to control the functional elements of the device to perform the functions described below. Additionally or alternatively, the base station 105 may perform aspects of the functions described below using special-purpose hardware.
  • the base station 105 may determine a spread identifier associated with a control transmission to a UE.
  • the operations of 1405 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1405 may be performed by a RNTI component as described with reference to FIGs. 9 through 12.
  • the base station 105 may determine a set of error detecting check bits for a control information vector associated with the control transmission.
  • the operations of 1410 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1410 may be performed by a CRC component as described with reference to FIGs. 9 through 12.
  • the base station 105 may mask the set of error detecting check bits with the spread identifier.
  • the operations of 1415 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1415 may be performed by a masking component as described with reference to FIGs. 9 through 12.
  • the base station 105 may transmit a codeword determined from the control information vector and the masked set of error detecting check bits to the UE.
  • the operations of 1420 may be performed according to the methods described herein. In certain examples, aspects of the operations of 1420 may be performed by a transmitter as described with reference to FIGs. 9 through 12.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • 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 may be commonly referred to as CDMA2000 1X, 1X, etc.
  • IS-856 TIA-856) is commonly referred to as CDMA2000 1xEV-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) .
  • GSM Global System for Mobile Communications
  • An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB) , Evolved UTRA (E-UTRA) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, etc.
  • UMB Ultra Mobile Broadband
  • E-UTRA Evolved UTRA
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS) .
  • LTE and LTE-A are releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A, NR, and GSM are described in documents from the organization named “3rd Generation Partnership Project” (3GPP) .
  • 3GPP 3rd Generation
  • CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • 3GPP2 3rd Generation Partnership Project 2
  • the techniques described herein may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. While aspects of an LTE or an NR system may be described for purposes of example, and LTE or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE or NR applications.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 115 with service subscriptions with the network provider.
  • a small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed, etc. ) frequency bands as macro cells.
  • Small cells may include pico cells, femto cells, and micro cells according to various examples.
  • a pico cell for example, may cover a small geographic area and may allow unrestricted access by UEs 115 with service subscriptions with the network provider.
  • a femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by UEs 115 having an association with the femto cell (e.g., UEs 115 in a closed subscriber group (CSG) , UEs 115 for users in the home, and the like) .
  • An eNB for a macro cell may be referred to as a macro eNB.
  • An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB.
  • An eNB may support one or multiple (e.g., two, three, four, and the like) cells, and may also support communications using one or multiple component carriers.
  • the wireless communications system 100 or systems described herein may support synchronous or asynchronous operation.
  • the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time.
  • the base stations 105 may have different frame timing, and transmissions from different base stations 105 may not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • 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.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • PLD programmable logic device
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer.
  • non-transitory computer-readable media may comprise random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable read only memory (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read only memory
  • CD compact disk
  • magnetic disk storage or other magnetic storage devices or any other non-transitory medium
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave
  • 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 disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés, des systèmes et des dispositifs destinés aux communications sans fil. Un dispositif sans fil, tel qu'un UE, peut recevoir une transmission de commande comprenant un mot de code candidat généré à partir d'un vecteur d'informations de commande et un ensemble de bits de détection d'erreur, identifier un identifiant d'étalement pour l'UE associé à la transmission de commande, effectuer une opération de décodage sur le mot de code pour obtenir au moins un chemin candidat, démasquer des ensembles respectifs de bits de contrôle de détection d'erreur pour au moins un chemin candidat, comparer un ensemble généré de bits de contrôle de détection d'erreur à l'ensemble respectif de bits de contrôle de détection d'erreur et déterminer ainsi s'il s'agit du destinataire prévu des informations de commande.
PCT/CN2017/109943 2017-11-08 2017-11-08 Étalement d'identifiant de réseau radio WO2019090516A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/109943 WO2019090516A1 (fr) 2017-11-08 2017-11-08 Étalement d'identifiant de réseau radio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/109943 WO2019090516A1 (fr) 2017-11-08 2017-11-08 Étalement d'identifiant de réseau radio

Publications (1)

Publication Number Publication Date
WO2019090516A1 true WO2019090516A1 (fr) 2019-05-16

Family

ID=66438163

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/109943 WO2019090516A1 (fr) 2017-11-08 2017-11-08 Étalement d'identifiant de réseau radio

Country Status (1)

Country Link
WO (1) WO2019090516A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102395205A (zh) * 2011-11-01 2012-03-28 新邮通信设备有限公司 一种扩展物理层控制信道资源数量的方法和系统
US20130107809A1 (en) * 2010-06-08 2013-05-02 Electronics And Telecommunications Research Institute Method and apparatus for transmission and reception in multi-carrier wireless communication systems
WO2014113537A1 (fr) * 2013-01-16 2014-07-24 Interdigital Patent Holdings, Inc. Génération et réception de signaux de découverte
US20150173054A1 (en) * 2012-09-21 2015-06-18 Fujitsu Limited Wireless communication method, wireless communication system, wireless terminal, and wireless base station

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130107809A1 (en) * 2010-06-08 2013-05-02 Electronics And Telecommunications Research Institute Method and apparatus for transmission and reception in multi-carrier wireless communication systems
CN102395205A (zh) * 2011-11-01 2012-03-28 新邮通信设备有限公司 一种扩展物理层控制信道资源数量的方法和系统
US20150173054A1 (en) * 2012-09-21 2015-06-18 Fujitsu Limited Wireless communication method, wireless communication system, wireless terminal, and wireless base station
WO2014113537A1 (fr) * 2013-01-16 2014-07-24 Interdigital Patent Holdings, Inc. Génération et réception de signaux de découverte

Similar Documents

Publication Publication Date Title
US10880914B2 (en) Grant free uplink transmission techniques
US10993215B2 (en) SPDCCH reuse indication constraint under DMRS sharing
US11178671B2 (en) High-reliability modulation coding scheme and logical channel prioritization
AU2019239097B2 (en) Search space overbooking and pruning
US11895708B2 (en) Signaling support and resource mapping for 2-step RACH
US20200052825A1 (en) Group feedback techniques in wireless systems
US11395277B2 (en) Control channel mapping within search space for wireless systems
US11523343B2 (en) Monitoring wake-up signal using common identifier
US10939311B2 (en) Indication of additional system information
US20200028623A1 (en) Block based preamble design for autonomous uplink transmissions
WO2020024148A1 (fr) Groupement d'équipements utilisateur pour accès multiple non orthogonal de liaison montante
WO2020024871A1 (fr) Conception de séquence de signature pour système à accès multiple non orthogonal
WO2019090516A1 (fr) Étalement d'identifiant de réseau radio
EP4008079A1 (fr) Perforation de signal de référence de canal partagé de liaison descendante physique
EP3827431A1 (fr) Gestion de surréservation destinée à de multiples noeuds émetteurs-récepteurs

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17931411

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17931411

Country of ref document: EP

Kind code of ref document: A1