[go: up one dir, main page]

WO2014094294A1 - Procédé pour déterminer des informations de qualité de canal (cqi) pour des blocs de ressources physiques ayant un surdébit réduit - Google Patents

Procédé pour déterminer des informations de qualité de canal (cqi) pour des blocs de ressources physiques ayant un surdébit réduit Download PDF

Info

Publication number
WO2014094294A1
WO2014094294A1 PCT/CN2012/087155 CN2012087155W WO2014094294A1 WO 2014094294 A1 WO2014094294 A1 WO 2014094294A1 CN 2012087155 W CN2012087155 W CN 2012087155W WO 2014094294 A1 WO2014094294 A1 WO 2014094294A1
Authority
WO
WIPO (PCT)
Prior art keywords
subframes
overhead
overhead information
pattern
resource
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2012/087155
Other languages
English (en)
Inventor
Gilles Charbit
Erlin Zeng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Broadcom Corp
Original Assignee
Broadcom Corp
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 Broadcom Corp filed Critical Broadcom Corp
Priority to PCT/CN2012/087155 priority Critical patent/WO2014094294A1/fr
Publication of WO2014094294A1 publication Critical patent/WO2014094294A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI

Definitions

  • the disclosure herein relates to the field of wireless or cellular communications, and more particularly to methods, devices, and network equipment for determining channel quality information (CQI) for a radio signal comprised of physical resource blocks having a reduced amount of overhead information, such as demodulation reference signals.
  • CQI channel quality information
  • 3GPP The Third Generation Partnership Project
  • 3GPP unites six telecommunications standards bodies, known as "Organizational Partners," and provides their members with a stable environment to produce the highly successful Reports and Specifications that define 3GPP technologies. These technologies are constantly evolving through what have become known as “generations” of commercial cellular/mobile systems.
  • 3GPP also uses a system of parallel “releases” to provide developers with a stable platform for implementation and to allow for the addition of new features required by the market. Each release includes specific functionality and features that are specified in detail by the version of the 3 GPP standards associated with that release.
  • UMTS Universal Mobile Telecommunication System
  • 3G Third Generation
  • UMTS includes specifications for both the UMTS Terrestrial Radio Access Network (UTRAN) as well as the Core Network.
  • UTRAN includes the original Wideband CDMA (W-CDMA) radio access technology that uses paired or unpaired 5-MHz channels, initially within frequency bands near 2 GHz but subsequently expanded into other licensed frequency bands.
  • W-CDMA Wideband CDMA
  • the UTRAN generally includes node-Bs (NBs) and radio network controllers (RNCs).
  • NBs node-Bs
  • RNCs radio network controllers
  • GSM/EDGE is an umbrella term for the second-generation (2G) radio technologies initially developed within the European Telecommunication Standards Institute (ETSI) but now further developed and maintained by 3 GPP.
  • the GSM/EDGE Radio Access Network (GERAN) generally comprises base stations (BTSs) and base station controllers (BSCs).
  • BTSs base stations
  • BSCs base station controllers
  • LTE Long Term Evolution
  • 4G fourth- generation
  • E-UTRAN Evolved UTRAN
  • LTE is targeted at various licensed frequency bands, including the 700-MHz band in the United States.
  • LTE is accompanied by improvements to non- radio aspects commonly referred to as System Architecture Evolution (SAE), which includes Evolved Packet Core (EPC) network. LTE continues to evolve through subsequent releases.
  • SAE System Architecture Evolution
  • EPC Evolved Packet Core
  • ePDCCH enhanced Physical Downlink Control Channel
  • ICIC inter-cell interference coordination
  • Release 1 1 Another feature of Release 1 1 is carrier aggregation (CA), which by which individual carriers are combined or aggregated to increase the bandwidth available for transmission and, consequently, the data transmission rates.
  • Each aggregated carrier is referred to as a component carrier (CC).
  • CC component carrier
  • Each CC can have a bandwidth of 1.4, 3, 5, 10, 15 or 20 MHz and a maximum of five CCs can be aggregated.
  • FDD the number of aggregated carriers can be different in downlink (network-to-device) and uplink (device-to- network).
  • CC types defined in Releases 8 and 9 are allowed to be aggregated in Release 1 1 CA.
  • Embodiments of the present disclosure include methods for determining channel quality information (CQI) for a received physical-layer (PHY) channel comprising a plurality of subframes, comprising receiving a first set of one or more subframes comprising a data message, wherein at least a portion of the first set of one or more subframes comprise overhead information related to demodulation of the data message; receiving a subframe comprising a first control message, wherein the first control message comprises a request to determine CQI and configuration information related to the request; determining, based on the configuration information, a resource within the first set of subframes to be used for CQI determination and one or more overhead information patterns within the resource; determining one or more CQI values for each of the overhead information patterns; and transmitting a subframe comprising a second control message, wherein the second control message comprises the determined CQI values.
  • CQI channel quality information
  • Embodiments of the present disclosure also include methods for determining CQI for a transmitted PHY channel comprising a plurality of subframes, comprising transmitting a first set of one or more subframes comprising a data message to a receiving apparatus, wherein at least a portion of the first set of subframes comprise overhead information related to demodulation of the data message; determining a set of parameters for CQI determination, wherein the parameters include a resource within the first set of subframes to be used for CQI determination and one or more overhead information patterns within the resource; encoding the set of parameters into configuration information comprising one of a plurality of assumptions to be used by the receiving apparatus; transmitting a subframe comprising a first control message, wherein the first control message comprises the configuration information and a request to determine CQI; and receiving a subframe comprising a second control message, wherein the second control message comprises one or more CQI values.
  • Embodiments also include wireless network equipment or apparatus (e.g., eNB or component of an eNB), wireless communication device or apparatus (e.g., a UE or component of a UE), and computer-readable media embodying one or more of these methods.
  • wireless network equipment or apparatus e.g., eNB or component of an eNB
  • wireless communication device or apparatus e.g., a UE or component of a UE
  • computer-readable media embodying one or more of these methods.
  • Fig. 1 is a high-level block diagram of the architecture of the Long Term Evolution (LTE) Evolved UTRAN (E-UTRAN) and Evolved Packet Core (EPC) network, as standardized by 3 GPP;
  • LTE Long Term Evolution
  • E-UTRAN Evolved UTRAN
  • EPC Evolved Packet Core
  • Fig. 2A is a high-level block diagram of the E-UTRAN architecture in terms of its constituent components, protocols, and interfaces;
  • Fig. 2B is a block diagram of the protocol layers of the control-plane portion of the radio (Uu) interface between a user equipment (UE) and the E-UTRAN;
  • Fig. 2C is a block diagram of the LTE radio interface protocol architecture from the perspective of the PHY layer
  • Fig. 3 is block diagram of the type-1 LTE radio frame structure used for both full-duplex and half-duplex FDD operation
  • Fig. 4 A is a block diagram illustrating one manner in which control channel elements (CCEs) and resource element groups (REGs) for a PDCCH can be mapped with a PDSCH into LTE physical resource blocks (PRBs);
  • CCEs control channel elements
  • REGs resource element groups
  • Fig. 4B is a block diagram illustrating one manner in which a PDCCH and a PDSCH can be mapped into PRBs along with various amounts of demodulation reference signal (DM-RS) overhead;
  • DM-RS demodulation reference signal
  • Fig. 4C is a block diagram showing multiple PDSCH subframes comprising different amounts of DM-RS overhead
  • Fig. 5A is a flowchart of an exemplary method for measuring and reporting channel quality information (CQI) by a wireless communication device, according to embodiments of the present disclosure
  • Figs. 5B, 5C, and 5D are flowcharts illustrating variations of operations performed in particular blocks of the method shown in Fig. 5A, according to embodiments of the present disclosure
  • Fig. 6 is a flowchart of an exemplary method in a network equipment for providing information characterizing channel resources to be used for a CQI report by a wireless communication device, according to one or more embodiments of the present disclosure
  • Figs. 7A, 7B, and 7C are exemplary tables associating values of bit fields in a message with actions related to CQI measurements, according to various embodiments of the present disclosure
  • Figs. 8A, 8B, 8C, 8D, and 8E are high-level timing diagrams showing relationships between PRBs used for CQI measurements and DM-RS overhead information, according to various embodiments of the present disclosure
  • Fig. 9 is a block diagram an exemplary apparatus, such as a wireless communication device, according to one or more embodiments of the present disclosure.
  • Fig. 10 is a block diagram an exemplary apparatus, such as a network equipment, according to one or more embodiments of the present disclosure.
  • E-UTRAN 100 comprises one or more evolved Node B's (eNB), such as eNBs 105, 1 10, and 115, and one or more user equipment (UE), such as UE 120.
  • eNB evolved Node B's
  • UE user equipment
  • "user equipment” or “UE” means any wireless communication device (e.g., smartphone or computing device) that is capable of communicating with 3GPP-standard- compliant network equipment, such as UTRAN, E-UTRAN, and/or GERAN, as the second- generation (“2G”) 3GPP radio access network is commonly known.
  • 2G second- generation
  • E-UTRAN 100 is responsible for all radio-related functions in the network, including radio bearer control, radio admission control, radio mobility control, scheduling, and dynamic allocation of resources to UEs in uplink and downlink, as well as security of the communications with the UE. These functions reside in the eNBs, such as eNBs 105, 110, and 1 15.
  • the eNBs in the E-UTRAN communicate with each other via the XI interface, as shown in Fig. 1A.
  • the eNBs also are responsible for the E-UTRAN interface to the EPC, specifically the S 1 interface to the Mobility Management Entity (MME) and the Serving Gateway (SGW), shown collectively as MME/S-GWs 134 and 138 in Fig.
  • MME Mobility Management Entity
  • SGW Serving Gateway
  • the MME/S-GW handles both the overall control of the UE and data flow between the UE and the rest of the EPC. More specifically, the MME processes the signaling protocols between the UE and the EPC, which are known as the Non Access Stratum (NAS) protocols.
  • the S-GW handles all Internet Procotol (IP) data packets between the UE and the EPC, and serves as the local mobility anchor for the data bearers when the UE moves between eNBs, such as eNBs 105, 110, and 115.
  • IP Internet Procotol
  • Fig. 2A is a high-level block diagram of LTE architecture in terms of its constituent entities - UE, E-UTRAN, and EPC - and high-level functional division into the Access Stratum (AS) and the Non- Access Stratum (NAS).
  • Fig. 1 also illustrates two particular interface points, namely Uu (UE/E-UTRAN Radio Interface) and SI (E-UTRAN/EPC interface), each using a specific set of protocols, i.e., Radio Protocols and SI Protocols.
  • Each of the two protocols can be further segmented into user plane (or "U-plane") and control plane (or "C-plane") protocol functionality.
  • U-plane user plane
  • C-plane control plane
  • the U-plane carries user information (e.g., data packets) while the C-plane is carries control information between UE and E-UTRAN.
  • Fig. 2B is a block diagram of the C-plane protocol stack on the Uu interface comprising Physical (PHY), Medium Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), and Radio Resource Control (RRC) layers.
  • the PHY layer is concerned with how and what characteristics are used to transfer data over transport channels on the LTE radio interface.
  • the MAC layer provides data transfer services on logical channels, maps logical channels to PHY transport channels, and reallocates PHY resources to support these services.
  • the RLC layer provides error detection and/or correction, concatenation, segmentation, and reassembly, reordering of data transferred to or from the upper layers.
  • the PHY, MAC, and RLC layers perform identical functions for both the U-plane and the C-plane.
  • the PDCP layer provides ciphering/deciphering and integrity protection for both U-plane and C-plane, as well as other functions for the U-plane such as header compression.
  • Fig. 2C is a block diagram of the LTE radio interface protocol architecture from the perspective of the PHY.
  • the interfaces between the various layers are provided by Service Access Points (SAPs), indicated by the ovals in Fig. 2C.
  • SAPs Service Access Points
  • the PHY layer interfaces with the MAC and RRC protocol layers described above.
  • the MAC provides different logical channels to the RLC protocol layer (also described above), characterized by the type of information transferred, whereas the PHY provides a transport channel to the MAC, characterized by how the information is transferred over the radio interface.
  • the PHY performs various functions including error detection and correction; rate-matching and mapping of the coded transport channel onto physical channels; power weighting, modulation; and demodulation of physical channels; transmit diversity, beamforming multiple input multiple output (MIMO) antenna processing; and providing radio measurements to higher layers, such as RRC.
  • Downlink (i.e., eNB to UE) physical channels provided by the LTE PHY include Physical Downlink Shared Channel (PDSCH), Physical Multicast Channel (PMCH), Physical Downlink Control Channel (PDCCH), Relay Physical Downlink Control Channel (R-PDCCH), Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), and Physical Hybrid ARQ Indicator Channel (PHICH).
  • PDSCH Physical Downlink Shared Channel
  • PMCH Physical Multicast Channel
  • PCCH Physical Downlink Control Channel
  • R-PDCCH Relay Physical Downlink Control Channel
  • PBCH Physical Broadcast Channel
  • PCFICH Physical Control Format Indicator Channel
  • PHICH Physical Hybrid ARQ Indic
  • the multiple access scheme for the LTE PHY is based on Orthogonal Frequency Division Multiplexing (OFDM) with a cyclic prefix (CP) in the downlink, and on Single- Carrier Frequency Division Multiple Access (SC-FDMA) with a cyclic prefix in the uplink.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single- Carrier Frequency Division Multiple Access
  • FDD Frequency Division Duplexing
  • TDD Time Division Duplexing
  • Fig. 3 shows the radio frame structure (“tyP e 1") use d for both full-duplex and half-duplex FDD operation.
  • the radio frame has a duration of 10 ms and consists of 20 slots, labeled 0 through 19, each with a duration of 0.5 ms.
  • a 1-ms subframe comprises two consecutive slots where subframe i consists of slots 2i and 2i + 1 .
  • Each slot consists of N DL sym b OFDM symbols, each of which is comprised of N sc OFDM subcarriers.
  • the value of N DL sym b is typically 7 (with a normal CP) or 6 (with an extended- length CP) for subcarrier bandwidth of 15 kHz.
  • the value of N sc is configurable based upon the available channel bandwidth. Since persons of ordinary skill in the art will be familiar with the principles of OFDM, further details are omitted in this description.
  • the combination of a particular subcarrier in a particular symbol is known as a resource element (RE).
  • Each RE is used to transmit a particular number of bits, depending on the type of modulation and/or bit-mapping constellation used for that RE. For example, some REs may carry two bits using QPSK modulation, while other REs may carry four or six bits using 16- or 64-QAM, respectively.
  • the radio resources of the LTE PHY are also defined in terms of physical resource blocks (PRBs).
  • a PRB spans ⁇ sub -carriers over the duration of a slot (i.e., N DL sym b symbols), where N ⁇ is typically either 12.
  • a PRB spanning the same subcarriers during an entire subframe i.e., 2N DL sym b symbols
  • the resources available in a subframe of the LTE PHY downlink comprise N DL RB PRB pairs, each of which comprises 2N DL sym b* N RB SC REs.
  • a PRB pair comprises 168 REs.
  • PRBs consecutively numbered PRBs (e.g., PRB; and PRBj + i) comprise consecutive blocks of subcarriers.
  • PRBo comprises sub-carrier 0 through 11 while PRBi comprises sub-carries 12 through 23.
  • VRBs virtual resource blocks
  • distributed VRBs may be mapped to non-consecutive PRBs according to various rules, as described in 3GPP Technical Specification (TS) 36.213 or otherwise known to persons of ordinary skill in the art.
  • TS 3GPP Technical Specification
  • PRB will be used in this disclosure to refer to both physical and virtual resource blocks.
  • PRB will be used henceforth to refer to a resource block for the duration of a subframe, i.e., a PRB pair, unless otherwise specified.
  • the LTE PHY maps the various downlink physical channels to the resources shown in Fig. 3.
  • the PDCCH carries scheduling assignments and other control information.
  • a physical control channel is transmitted on an aggregation of one or several consecutive control channel elements (CCEs), and a CCE is mapped to the physical resource shown in Fig. 3 based on resource element groups (REGs), each of which is comprised of a plurality of REs.
  • REGs resource element groups
  • a CCE may be comprised of nine (9) REGs, each of which is comprised of four (4) REs.
  • Fig. 4A illustrates one manner in which the CCEs and REGs can be mapped to the physical resource, i.e., PRBs.
  • PRBs Physical resource block allocation
  • the REGs comprising the CCEs of the PDCCH may be mapped into the first three symbols of a subframe, whereas the remaining symbols are available for other physical channels, such as the PDSCH which carries user data.
  • Each of the REGs comprises four REs, which are represented by the small, dashed-line rectangles. Since QPSK modulation is used for the PDCCH, in the exemplary configuration of Fig. 4A, each REG comprises eight (8) bits and each CCE comprises 72 bits. Although two CCEs are shown in Fig. 4A, the number of CCEs may vary depending on the required PDCCH capacity, determined by number of users, amount of measurements and/or control signaling, etc. Moreover, other ways of mapping REGs to CCEs will be apparent to those of ordinary skill in the art.
  • the 3GPP specifications include an enhanced PDCCH (ePDCCH) in addition to the legacy PDCCH described above.
  • the ePDCCH is intended to increase capacity and improve spatial reuse of control channel resources, improve inter-cell interference coordination (ICIC), and add antenna beamforming and/or transmit diversity support for control channel.
  • the ePDCCH is constructed by aggregating one or more enhanced control channel elements (eCCEs).
  • An eCCE is comprised of one or more enhanced resource element groups (eREGs), each of which is comprised of one or more REs.
  • eREGs enhanced resource element groups
  • an eCCE comprised of nine eREGs, each having four REs may be configured with the same capacity as a CCE.
  • eCCEs may be flexibly configured with various numbers and sizes of eREGs.
  • the ePDCCH (i.e., eCCEs) may be mapped to PRBs for transmission either in a localized or distributed manner.
  • the localized mapping provides frequency selective scheduling gain and beamforming gain while the distributed transmission provides robust ePDCCH transmission via frequency diversity in case valid channel state information is not available to the receiver.
  • each eCCE must be mapped to a minimum number PRBs distributed sufficiently throughout the range of sub-carriers in the physical resource.
  • CA carrier aggregation
  • Each aggregated carrier is referred to as a component carrier (CC).
  • CC can have a channel bandwidth of 1.4, 3, 5, 10, 15 or 20 MHz and a maximum of five CCs can be aggregated.
  • CC types defined in Releases 8 and 9 are allowed to be aggregated in Release 11 CA.
  • a UE with CA reception and/or transmission capability can simultaneously receive and/or transmit on multiple CCs corresponding to multiple serving cells. Nevertheless, a UE has only one RRC connection with the network, which occurs through a serving cell referred to as the Primary Cell (PCell). The UE also conducts NAS procedures (e.g., mobility and connection management) via the PCell. Depending on UE capabilities, Secondary Cells (SCells) can be configured to form together with the PCell a set of serving cells for the UE. A PCell and one or more SCells may be aggregated for a UE within coverage areas of the PCell and the SCells.
  • PCell Primary Cell
  • SCells Secondary Cells
  • NCTs new carrier types
  • These proposed NCTs would also be used as CCs for CA.
  • the ultimate goals for NCTs include higher data transmission rates to the end user and improved usage efficiency of the limited spectrum resources.
  • One approach for achieving these goals via CA using NCTs is to reduce the interference level at low-to-medium system usage levels by minimizing overhead information in the uplink and downlink transmissions, such as legacy control signaling and reference signals.
  • the PCell may control the configuration of the NCT SCells including reduced overhead information.
  • Various downlink reference signals are defined in Release 1 1, and each comprises a particular set of predetermined information that is known by the UE and used by UE for a particular purpose.
  • Cell-specific reference signals (CRS) are transmitted to all UEs in a particular cell, and enable a receiving UE to determine the phase reference for demodulating the downlink control channels (e.g., PDCCH) and downlink data channels (e.g., PDSCH).
  • CRS are included in every downlink PRB of every subframe.
  • various UE-specific reference signals may be transmitted along with downlink control- or data-channel information directed to a particular UE.
  • DM-RS demodulation reference signals
  • CSI-RS channel-state information reference signals
  • CQI channel quality indicator
  • CSI-RS are more sparsely distributed in frequency than UE-specific DM-RS but are transmitted regularly by the eNB, while UE-specific DM-RS are only transmitted in association with UE-specific data or control information. Separating the reference-signal structures supporting CSI feedback and demodulation reduces reference-signal overhead and allows for implementation of various beam-forming schemes.
  • PRB m includes 36 REs comprising PDCCH 480, similar to the illustration of Fig. 4A.
  • the remainder of PRB m comprises PDSCH 460 and DM-RS 470, which is associated with PDSCH 460 and comprises the 12 shaded REs, whose positions in PRB m are merely exemplary.
  • the DM-RS size of 12 REs corresponds to a rank of two or less (i.e., 1 or 2 different data streams transmitted simultaneously on the same time/frequency resources); DM-RS 470 comprises 24 REs for ranks of three or more. Note that DM-RS 470 does not carry user data comprising PDSCH 460, and vice versa.
  • PRB m+ i also comprises PDCCH 480 (32 REs) but does not include DM-RS 470, with a result that PDSCH 465 comprises 132 REs compared to the 120 REs comprising PDSCH 460 of PRB m .
  • Fig. 4B shows one PRB with DM-RS and one without
  • the proportion of PDSCH PRBs within a subframe that contain DM-RS may be varied.
  • one out of every three PDSCH PRBs in a subframe may contain DM-RS.
  • PRBs m and m+3 of subframe n include DM-RS information (as indicated by the shading and annotation) while PRBs m+l , m+2, m+4, and m+5 do not.
  • the proportion of PDSCH PRBs containing DM-RS may be varied across subframes.
  • DM-RS may be included with PDSCH PRBs transmitted ever ⁇ ' third subframe.
  • subframe n includes two PRBs with DM-RS while subframes n+ ⁇ and n+2 do not include any PRBs with DM-RS.
  • DM-RS subframes n+ ⁇ and n+2 do not include any PRBs with DM-RS.
  • these proportions are merely exemplary and other inter- or intra-subframe DM-RS proportions may be used within the scope of the present disclosure.
  • the UE determines which of the 15 allowed combinations of MCS and TBS gives the highest data throughput without exceeding a maximum error rate.
  • the UE may report CQI index periodically or aperiodically (e.g., upon demand).
  • An aperiodic CQI report in subframe n+k is triggered by the UE's receipt in subframe n of an uplink DCI format message containing an appropriate value in the "CSI Request" field.
  • the CSI-RS information is used by the UE to compute a channel estimate that is further used to compute the CQI index for the PDSCH transport block comprising the CSI Reference Resource (CSIRR).
  • CSIRR CSI Reference Resource
  • the CSIRR is defined in the frequency domain by the group of downlink PRBs corresponding to the band for which the determined CQI index relates, and in the time domain by a single downlink subframe n - n cQi_ref (i.e., n C Qi_ re f subframes prior to the current uplink subframe n). Moreover, when determining the CQI index, the UE assumes that the first three symbols of subframe n - tic Q i_ref are occupied by control-channel signaling (e.g., PDCCH) and that no REs in the CSI reference resource comprise broadcast or synchronization signals.
  • control-channel signaling e.g., PDCCH
  • the UE is required to assume when determining CQI index that the UE-specific reference signal overhead (i.e., DM-RS) is consistent with the RI that it most recently reported to the eNB. For example, if the UE most recently reported RI ⁇ 2, then it should assume when determining CQI index that each of the PRBs in subframe n - nc Q i_ re f that comprise the CSIRR include a 12-RE DM-RS (e.g., similar to PRB m in Fig. 4B); otherwise the UE should assume that each of these PRBs include a 24-RE DM-RS.
  • DM-RS UE-specific reference signal overhead
  • Such assumptions provide the necessary accuracy in CQI index determination for pre-Re lease 12 implementations because the CSI reference resource comprises one or more PRBs of a PDSCH, and DM-RS information is included in every PDSCH PRB.
  • the DM-RS information may be included in only a portion of PDSCH PRBs in some subframes and in no PDSCH PRBs in other subframes, as illustrated in Fig. 4C. This may result in a mismatch or ambiguity between the actual DM-RS scheduling and the UE's DM-RS assumption for the purposes of CQI index determination.
  • the UE may determine the CQI index by assuming 24 DM-RS REs per PDSCH PRB (i.e., most recent RI > 2) in subframe n - nc Q i_ re f, but PDSCH PRBs in that subframe actually contained zero DM-RS REs.
  • each PRB used for CQI index determination comprises DM-RS REs, which leaves fewer REs available for PDSCH.
  • PRB m comprises 120 REs available for PDSCH 460 while PRB m+ i comprises 132 REs available for PDSCH 465 - a 10% difference.
  • a PRB with DM-RS comprises 108 REs available for PDSCH while a PRB without DM-RS comprises 132 REs - a 22% difference.
  • the UE will underestimate the number of REs - and thus the transport block size (TBS) - available for PDSCH when determining CQI index. This will cause the UE to report a CQI index corresponding to a lower-order MCS and/or smaller TBS than is warranted by actual channel conditions, resulting in lower downlink user data rates and less-efficient spectral usage.
  • TBS transport block size
  • Embodiments of the present disclosure solve these and other problems by providing methods for determining channel quality information (CQI) for a received physical-layer (PHY) channel comprising a plurality of subframes, comprising receiving a first set of one or more subframes comprising a data message, wherein at least a portion of the first set of one or more subframes comprise overhead information related to demodulation of the data message; receiving a subframe comprising a first control message, wherein the first control message comprises a request to determine CQI and configuration information related to the request; determining, based on the configuration information, a resource within the first set of subframes to be used for CQI determination and one or more overhead information patterns within the resource; determining one or more CQI values for each of the overhead information patterns; and transmitting a subframe comprising a second control message, wherein the second control message comprises the determined CQI values.
  • CQI channel quality information
  • Embodiments of the present disclosure also include methods for determining CQI for a transmitted PHY channel comprising a plurality of subframes, comprising transmitting a first set of one or more subframes comprising a data message to a receiving apparatus, wherein at least a portion of the first set of subframes comprise overhead information related to demodulation of the data message; determining a set of parameters for CQI determination, wherein the parameters include a resource within the first set of subframes to be used for CQI determination and one or more overhead information patterns within the resource; encoding the set of parameters into configuration information comprising one of a plurality of assumptions to be used by the receiving apparatus; transmitting a subframe comprising a first control message, wherein the first control message comprises the configuration information and a request to determine CQI; and receiving a subframe comprising a second control message, wherein the second control message comprises one or more CQI values.
  • the first set of one or more subframes comprises one of a Physical Downlink Shared Channel (PDSCH) and an Enhanced Physical Downlink Control Channel (ePDCCH); the first control message is received in subframe n and comprises an Uplink DCI Format message; the one or more CQI values comprise one or more CQI indices; the resource comprises physical resource blocks (PRBs); and the overhead information comprises demodulation reference signal (DM-RS) overhead information.
  • PDSCH Physical Downlink Shared Channel
  • ePDCCH Enhanced Physical Downlink Control Channel
  • the first control message is received in subframe n and comprises an Uplink DCI Format message
  • the one or more CQI values comprise one or more CQI indices
  • the resource comprises physical resource blocks (PRBs)
  • the overhead information comprises demodulation reference signal (DM-RS) overhead information.
  • DM-RS demodulation reference signal
  • Embodiments also include wireless network equipment or apparatus (e.g., eNB or component of an eNB), wireless communication device or apparatus
  • Embodiments of the present disclosure also include methods for a network equipment or apparatus (e.g., eNB or component of an eNB) requesting channel state information (CSI) from a wireless communication device or apparatus (e.g., a UE or component of a UE) to provide the device with additional information that identifies a CSI Reference Resource (CSIRR) used for measuring CSI and resolves the uncertainty or ambiguity of which PRBs within the CSIRR have full DM-RS and which have reduced DM- RS (e.g., no DM-RS).
  • CSIRR CSI Reference Resource
  • the network equipment receives CSI reports comprising one or more measurements (e.g., CQI indices) based on the additional information from the device, and utilizes the measurements to determine a configuration for a downlink transmission channel (e.g., a PDSCH) received by the device.
  • CSI reports comprising one or more measurements (e.g., CQI indices) based on the additional information from the device, and utilizes the measurements to determine a configuration for a downlink transmission channel (e.g., a PDSCH) received by the device.
  • Other embodiments include network equipment or apparatus and computer-readable media embodying one or more of the methods.
  • Embodiments of the present disclosure also include methods for a wireless communication device or apparatus (e.g., a UE or component of a UE) to receive, in conjunction with a CSI request from a network equipment or apparatus (e.g., eNB or component of an eNB), additional information identifying a CSIRR used for measuring CSI and resolving the uncertainty or ambiguity of which PRBs within the CSIRR have full DM- RS and which have reduced DM-RS (e.g., no DM-RS).
  • the device further utilizes the additional information to make one or more measurements (e.g., CQI indices) and reports these measurements to the network equipment.
  • Fig. 5A is a flowchart of a communication method according to one or more embodiments of the present disclosure. While the communication method of Fig. 5A is described in terms of being performed by a wireless communication device (e.g., a UE or a component of a UE, such as a modem) in relation to downlink communication from a network equipment (e.g.., an eNB) to the device, in some embodiments it may be performed by a network equipment in relation to uplink communication from the device to the network equipment.
  • a wireless communication device e.g., a UE or a component of a UE, such as a modem
  • a network equipment e.g., an eNB
  • the method is illustrated by blocks in the particular order of Fig. 5A, this order is merely exemplary and the steps of the method may be performed in a different order than shown by Fig. 5 A, and may be combined and/or divided into blocks having different functionality.
  • the device establishes a PDSCH connection with the network equipment. This may be done, for example, using various signaling messages (e.g., RRC messages) known to persons of ordinary skill in the art.
  • the establishment of the PDSCH connection may be initiated by the device, while in other embodiments it may be initiated by the network equipment.
  • the connection may be an ePDCCH connection.
  • the device receives one or more higher-layer signaling messages comprising reduced DM-RS overhead configuration parameters.
  • These parameters may comprise identifiers for one or more DM-RS overhead patterns, repetition period (e.g., in subframes) of one or more DM-RS overhead patterns, pointers to one or more subframes within a repetition period, or other parameters described in more detail below.
  • the operation of block 510 also may comprise the device storing the received configuration parameters in memory.
  • the device receives downlink subframe n comprising ePDCCH PRBs bearing an Uplink DCI Format message. In some embodiments, the device also receives PRBs comprising a PDSCH in downlink subframe n.
  • the device determines whether the Uplink DCI Format message received in block 520 is a Format-0 message that includes a CSI Request field. If the device determines that it is not a Format-0 message, then it proceeds to block 540 where it performs other processing appropriate to the particular format type. If the device determines that the Uplink DCI Format message received in block 520 is a Format-0 message, then it proceeds to block 550.
  • the device determines whether the Uplink DCI Format message indicates that channel measurements (e.g., CQI index) should be made on PRBs having reduced DM-RS overhead. For example, the device may determine this by comparing the value of the CSI Request field in the Uplink DCI Format message to a table stored in the device's memory that associates a plurality of CSI Request values with DM-RS overhead assumptions, commands, instructions, or other information.
  • An exemplary table corresponding to a two-bit CSI Request field is shown in Fig. 7A. In this table, values "10" and "11" correspond to CSI Requests for which two different DM-RS overhead assumptions are indicated. If the received CSI Request equals "10" or "1 1", then the device proceeds to block 570; otherwise, the device proceeds to block 560 where it performs other processing corresponding to other CSI Request values.
  • Fig. 7B shows another exemplary table of values for the CSI Request field that can be used for the operation of block 550.
  • values "10" and “1 1" correspond to CSI Requests for which an aperiodic CSI report is configured by higher layers. If the received CSI Request equals "10" or "11”, then the device proceeds to block 570; otherwise, the device proceeds to block 560 where it performs other processing corresponding to other CSI Request values.
  • the device determines the DM-RS overhead assumption and CSIRR to be used for determining the CQI index.
  • the DM-RS overhead assumption may be determined, for example, from the contents of the Uplink DCI Format message received by device in block 510. For example, the device may determine this by comparing the value of the CSI Request field in the Uplink DCI Format message to a table stored in the device's memory that associates a plurality of CSI Request values with DM-RS overhead assumptions, commands, instructions, or other information.
  • Fig. 7A shows an exemplary table corresponding to a two-bit CSI Request field that can be used for the operation of block 570.
  • value "10” corresponds to a CSI Request for which DM-RS overhead assumption #1 is to be used by the device for CQI index determination
  • value "1 1” corresponds to a CSI Request for which DM-RS overhead assumptions #2 is to be used.
  • these two values may be used to indicate not merely a single serving cell but also a set of serving cells, such as a PCell and one or more NCT SCells aggregated for communication between the device and the network.
  • the table of Fig. 7A includes values corresponding to two overhead assumptions, the person of ordinary skill will understand that if the length of CSI Request field is increased (e.g., to three bits), the table can be expanded to include more values indicating additional DM-RS overhead assumptions.
  • the device may determine the DM-RS overhead assumption to be used for CQI index determination from a different field in the Uplink DCI Format message.
  • the Uplink DCI Format message may comprise a dedicated field for indicating which DM-RS overhead assumption that the device should use.
  • a single-bit field (“bo") can be used to indicate two different overhead assumptions.
  • Fig. 7C shows an exemplary table that can be stored in the device's memory and used to interpret single-bit values of bo received by the device.
  • Fig. 5B is a flowchart describing a particular embodiment of blocks 570 and 580 that are shown in and were described above with reference to Fig. 5A.
  • the device determines that the DM-RS overhead assumption to be used for CQI index determination is "assumption #1.” This can be determined in any manner described above with reference to Figs. 5A, 7A, and 7C. In this embodiment, assumption #1 corresponds to full DM-RS overhead, such as shown in subframe n of Fig. 4C.
  • the device determines the CSIRR to be used together with DM-RS overhead assumption #1 for CQI index determination. In this embodiment, the device determines that the CSIRR is the PDSCH PRBs of downlink subframe n - n CQ i_ re f ⁇
  • Fig. 8A shows a sequence of subframes received and transmitted by the device according to this embodiment.
  • Fig. 8A shows a series of four subframes n - ncQi_ re f -3 ⁇ n - n C Qi_ re f -2. n - n C Qi_ re f -1 , and n - n C Qi_ re f .containing PDSCH PRBs received by the device.
  • the device receives an Uplink DCI Format message comprising a CSI Request and information indicating DM-RS overhead assumption #1 , as described above with respect to block 510 of Fig. 5A. Based on this information, the device also determines that the CSIRR is the PDSCH PRBs of downlink subframe n - n CQ i_ re f , indicated by CSIRR 800 in Fig. 5B. In block 580, the device determines the CQI index based on CSIR 800 with the assumption of full DM-RS overhead. Subsequently, the device then returns to block 590 of Fig.
  • Fig. 5C is a flowchart describing another particular embodiment of blocks 570 and 580 that are shown in and were described above with reference to Fig. 5A.
  • the device determines that the DM-RS overhead assumption to be used for CQI index determination is "assumption #2.” This can be determined in any manner described above with reference to Figs. 5 A, 7 A, and 7C.
  • assumption #2 corresponds to full DM-RS overhead, such as shown in subframe n of Fig. AC.
  • the device determines the CSIRR to be used together with DM-RS overhead assumption #2 for CQI index determination.
  • the device determines that the CSIRR is the PDSCH PRBs of downlink subframe n - n C Qi_ re f - ⁇ pattemi , where n pa ttemi is a value from the set [0, 1 , ... 7RD M RS-1 ].
  • the parameter TRDMRS represents the repetition period of the reduced DM-RS overhead pattern.
  • Fig. 8B shows a sequence of subframes received and transmitted by the device according to this embodiment.
  • Fig. 8B shows a series of four subframes n - n C Qi_ re f - 3, n - n C Qi_ re f -2, n - n C Qi_ re f -1 , and n - n C Qi_ re f .containing PDSCH PRBs received by the device.
  • one or more of the values of 7RDMRS and n pa tterni may be received by the device as fields in the Uplink DCI Format message.
  • one or more of the values of TRDMRS and n pa tterni may be received by the device in an upper-layer signaling message (e.g. an RRC message) from the eNB.
  • the device determines the CQI index based on CSIR 810 with the assumption of full DM-RS overhead. Subsequently, the device then returns to block 590 of Fig. 5A where it sends a CSI Report in subframe n+k comprising the determined CQI index, as also shown in Fig. 8B.
  • Fig. 5D is a flowchart describing another particular embodiment of blocks 570 and 580 that are shown in and were described above with reference to Fig. 5A.
  • the device determines that the DM-RS overhead assumption to be used for CQI index determination is "assumption #2.” This can be determined in any manner described above with reference to Figs. 5 A, 7 A, and 7C.
  • assumption #2 corresponds to a group of TRDMRS subframes with p different DM-RS overhead patterns, where p ⁇ 2.
  • Fig. 8C shows a sequence of subframes received and transmitted by the device according to this embodiment.
  • the device also determines two different DM-RS overhead pattern assumptions for CSIRR 820.
  • Pattern 1 corresponds to full DM-RS overhead while pattern 2 (identified as pattern 822) corresponds to zero-DM-RS overhead.
  • the value of TRDMRS may be received by the device as a field in the Uplink DCI Format message or in an upper-layer signaling message (e.g. an RRC message) from the network equipment.
  • DM-RS overhead patterns 1 and 2 may be implicitly understood by the device, while in other embodiments, information about patterns 1 and/or 2 may be received by the device as a field in the Uplink DCI Format message or in an upper-layer signaling message (e.g. an RRC message).
  • the device proceeds to block 580b, where it determines the CQI index based on the assumption of DM-RS overhead pattern 1 throughout CSIRR 820.
  • the device proceeds to block 580c where it determines whether more overhead patterns exist. If pattern p is the last overhead pattern, then the device returns to block 590 shown in Fig. 5A. Otherwise, the device proceeds to block 580d where it increments pattern index p, then returns to block 580b to determine CQI index based on the assumption of DM- RS overhead pattern p throughout CSIRR 820. In the illustration shown in Fig. 8C, the device would determine two different CQI indices corresponding to patterns 1 and 2.
  • CSIRR 830 comprises subframes having two different partial DM-RS overhead patterns, 831 and 832, and when combined they comprise full DM-RS overhead.
  • CSIRR 840 comprises subframes having two different partial DM-RS overhead patterns 841 and 842 and a zero-overhead DM-RS pattern 843.
  • Persons of ordinary skill will recognize that many different numbers and types of patterns may be used within the scope of this embodiment.
  • Fig. 6 is a flowchart of another communication method according to one or more other embodiments of the present disclosure. While the communication method of Fig. 6 is described in terms of being performed by a network equipment (e.g.., an eNB or component of an eNB) in relation to downlink communication from the network equipment to a wireless communication device (e.g., a UE or component of a UE, such as a modem), in some embodiments it may be performed by a device in relation to uplink communication from the device to the network equipment.
  • a network equipment e.g., an eNB or component of an eNB
  • a wireless communication device e.g., a UE or component of a UE, such as a modem
  • the method is illustrated by blocks in the particular order of Fig. 6, this order is merely exemplary and the steps of the method may be performed in a different order than shown by Fig. 6, and may be combined and/or divided into blocks having different functionality.
  • the network equipment establishes a PDSCH connection with the device. This may be done, for example, using various signaling messages (e.g., RRC messages) known to persons of ordinary skill in the art.
  • the establishment of the PDSCH connection may be initiated by the device, while in other embodiments it may be initiated by the network equipment.
  • the connection may be an ePDCCH connection.
  • the network equipment transmits one or more higher-layer signaling messages comprising reduced DM-RS overhead configuration parameters.
  • These parameters may comprise identifiers for one or more DM- RS overhead patterns, repetition period (e.g., in subframes) of one or more DM-RS overhead patterns, pointers to one or more subframes within a repetition period, or other parameters described in more detail below.
  • the network equipment transmits one or more subframes comprising one or more patterns of full and/or reduced DM-RS overhead information to the device.
  • the subframes may comprise PRBs corresponding to a PDSCH and/or an ePDCCH.
  • the network equipment determines that a CSI report, including a CQI index, is needed for the device.
  • the network equipment determines the CSI Reference Resource (CSIRR), DM-RS overhead assumption, and related information that the device should use for determining the CQI index.
  • CSIRR CSI Reference Resource
  • the network equipment may determine that the CSIRR comprises the PDSCH PRBs of a single downlink subframe and that the device should measure CQI index on that CSIRR using an assumption of full DM-RS overhead.
  • the network equipment may further determine the position of the subframe comprising the CSIRR relative to the subframe when the CSI Request will be scheduled for transmission (described below).
  • the network equipment may determine in block 640 that the CSIRR subframe is n CQ i_ re f subframes before the CSI Request subframe. In such case, the network equipment determines that the device should use DM-RS overhead assumption #1 , as described above and illustrated in Fig. 8A.
  • the network equipment may determine that it cannot schedule a subframe with full DM-RS overhead n CQ i_ re f subframes before the CSI Request subframe. In that case, the network equipment may identify the CSIRR as PRBs comprising a subframe having full DM-RS overhead within the TRDMRS - 1 subframes immediately preceding the n c Q i_ref th subframe before the subframe in which the CSI Request will be sent.
  • the network equipment determines that the device should use DM-RS overhead assumption #2, as described above and illustrated in Fig. 8B.
  • the network equipment may identify the CSIRR as PRBs in a group of TRDMRS contiguous subframes ending with subframe n - n CQ i_ re f ⁇ In such case, the network equipment determines that the device should use DM-RS overhead assumption #2, which corresponds to a plurality of different DM-RS overhead patterns over the duration of the CSIRR. This is illustrated by the various configurations shown in Figs. 8C, 8D, and 8E.
  • the network equipment encodes an Uplink DCI Format message comprising a CSI Request field with the device as the intended recipient.
  • the operation of block 650 comprises encoding the Uplink DCI Format message in "Format 0" as defined in relevant 3GPP standards specifications.
  • the CSI Request field may comprise information indicating a DM-RS overhead assumption for the device, such as shown in Fig. 7A.
  • the operation of block 650 may comprise encoding a CSI Request field and a separate field comprising information indicating a DM-RS overhead assumption for the device, such as shown in Figs. 7B and 7C.
  • the operation of block 650 may comprise encoding one or more fields with information indicating DM-RS overhead patterns such as, for example, the exemplary patterns shown in Figs. 8A through 8E.
  • the network equipment transmits downlink subframe n comprising the Uplink DCI Format message encoded in block 650.
  • the Uplink DCI Format message may be transmitted as part of a PDCCH or an ePDCCH.
  • the network equipment also may transmit a PDSCH to the device in subframe n.
  • the network equipment receives a CSI Report message from the device in subframe n+k in response to the CSI Request comprising the Uplink DCI Format message transmitted in block 650.
  • the value of k may be predetermined between the network equipment and the device.
  • the CSI Report message comprises one or more CQI index measurements made by the device according to the particular DM-RS overhead assumption indicated in the Uplink DCI Format message.
  • the network equipment determines a modulation and coding scheme (MCS) and/or a transmit block size (TBS) for subsequent PDSCH transmissions to the device.
  • MCS modulation and coding scheme
  • TBS transmit block size
  • Fig. 9 is a block diagram of exemplary apparatus 900 utilizing certain embodiments of the present disclosure, including one or more of the methods described above with reference to Figs. 5 through 8.
  • apparatus 900 comprises a wireless communication device, such as a UE or component of a UE.
  • Apparatus 900 comprises processor 910 which is operably connected to program memory 920 and data memory 930 via bus 970, which may comprise parallel address and data buses, serial ports, or other methods and/or structures known to those of ordinary skill in the art.
  • Program memory 920 comprises software code executed by processor 910 that enables apparatus 900 to communicate with one or more other devices using protocols according to various embodiments of the present disclosure, including the LTE PHY protocol layer and improvements thereto, including those described above with reference to Figs. 6 through 9.
  • Program memory 920 also comprises software code executed by processor 910 that enables apparatus 900 to communicate with one or more other devices using other protocols or protocol layers, such as LTE MAC, RLC, PDCP, and RRC layer protocols standardized by 3 GPP, or any improvements thereto; UMTS, HSPA, GSM, GPRS, EDGE, and/or CDMA2000 protocols; Internet protocols such as IP, TCP, UDP, or others known to persons of ordinary skill in the art; or any other protocols utilized in conjunction with radio transceiver 940, user interface 950, and/or host interface 960.
  • protocols or protocol layers such as LTE MAC, RLC, PDCP, and RRC layer protocols standardized by 3 GPP, or any improvements thereto; UMTS, HSPA, GSM, GPRS, EDGE, and/or CDMA2000 protocols; Internet protocols such as IP, TCP, UDP, or others known to persons of ordinary skill in the art; or any other protocols utilized in conjunction with radio transceiver 940, user interface 950,
  • Program memory 920 further comprises software code executed by processor 910 to control the functions of apparatus 900, including configuring and controlling various components such as radio transceiver 940, user interface 950, and/or host interface 960.
  • Such software code may be specified or written using any known or future developed programming language, such as e.g. Java, C++, C, and Assembler, as long as the desired functionality, e.g., as defined by the implemented method steps, is preserved.
  • Program memory 920 may comprise non-volatile memory (e.g., flash memory), volatile memory (e.g., static or dynamic RAM), or a combination thereof.
  • Data memory 930 may comprise memory area for processor 910 to store variables used in protocols, configuration, control, and other functions of apparatus 900. For example, information associated with one or more of the tables shown in Figs. 7A, 7B, and 7C may be stored in data memory 930. Data memory 930 may comprise non-volatile memory, volatile memory, or a combination thereof.
  • processor 910 may comprise multiple individual processors (not shown), each of which implements a portion of the functionality described above. In such case, multiple individual processors may be commonly connected to program memory 920 and data memory 930 or individually connected to multiple individual program memories and or data memories. More generally, persons of ordinary skill in the art will recognize that various protocols and other functions of apparatus 900 may be implemented in many different combinations of hardware and software including, but not limited to, application processors, signal processors, general-purpose processors, multi-core processors, ASICs, fixed digital circuitry, programmable digital circuitry, analog baseband circuitry, radio-frequency circuitry, software, firmware, and middleware.
  • Radio transceiver 940 may comprise radio-frequency transmitter and/or receiver functionality that enables apparatus 900 to communicate with other equipment supporting like wireless communication standards.
  • radio transceiver 940 includes an LTE transmitter and receiver that enable apparatus 900 to communicate with various E-UTRANs according to standards promulgated by 3GPP.
  • radio transceiver 940 includes circuitry, firmware, etc. necessary for apparatus 900 to communicate with network equipment using the LTE PHY protocol layer methods and improvements thereto such as those described above with reference to Figs. 5 through 8.
  • radio transceiver 940 includes circuitry, firmware, etc.
  • radio transceiver 940 includes circuitry, firmware, etc. necessary for apparatus 900 to communicate with various CDMA2000 networks according to 3GPP2 and/or 3GPP standards known to persons of ordinary skill in the art.
  • radio transceiver 940 is capable of communicating on a plurality of LTE frequency-division-duplex (FDD) frequency bands 1 through 25, as specified in 3GPP standards. In some embodiments, radio transceiver 940 is capable of communicating on a plurality of LTE time-division-duplex (TDD) frequency bands 33 through 43, as specified in 3GPP standards. In some embodiments, radio transceiver 940 is capable of communicating on a combination of these LTE FDD and TDD bands, as well as other bands specified in the 3GPP standards. In some embodiments, radio transceiver 940 is capable of communicating on one or more unlicensed frequency bands, such as the ISM band in the region of 2.4 GHz.
  • FDD frequency-division-duplex
  • TDD time-division-duplex
  • apparatus 900 is a mobile phone, in which case user interface 950 may comprise a microphone, a loudspeaker, slidable buttons, depressable buttons, a keypad, a keyboard, a display, a touchscreen display, and/or any other user- interface features commonly found on mobile phones.
  • apparatus 900 may comprise a tablet device, in which case user interface 950 may be primarily - but not strictly limited to - a touchscreen display.
  • apparatus 900 may be a data modem capable of being utilized with a host device, e.g., a tablet, laptop computer, etc.
  • apparatus 900 may be fixedly integrated with or may be removably connectable to the host device, such as via a USB port.
  • user interface 950 may be very simple or may utilize features of the host computing device, such as the host device's display and/or keyboard.
  • Host interface 960 of apparatus 900 also may take various forms depending on the particular embodiment of apparatus 900.
  • host interface 960 may comprise a USB interface, an HDMI interface, or the like.
  • host interface may be a USB or PCMCIA interface.
  • apparatus 900 may comprise more functionality than is shown in Fig. 9.
  • apparatus 900 may also comprise functionality such as a video and/or still-image camera, media player, etc.
  • radio transceiver 940 may include circuitry necessary to communicate using additional radio-frequency communication standards including GSM, GPRS, EDGE, UMTS, HSPA, CDMA2000, LTE, WiFi, Bluetooth, GPS, and/or others.
  • processor 910 may execute software code stored in program memory 920 to control such additional functionality.
  • Fig. 10 is a block diagram of an exemplary apparatus 1000 utilizing certain embodiments of the present disclosure, including those described above with reference to Figs. 5 through 8.
  • apparatus 1000 comprises a network equipment such as an eNB or component of an eNB.
  • Apparatus 1000 comprises processor 1010 which is operably connected to program memory 1020 and data memory 1030 via bus 1070, which may comprise parallel address and data buses, serial ports, or other methods and/or structures known to those of ordinary skill in the art.
  • Program memory 1020 comprises software code executed by processor 1010 that enables apparatus 1000 to communicate with one or more other devices using protocols according to various embodiments of the present disclosure, including the Radio Resource Control (RRC) protocol and improvements thereto.
  • RRC Radio Resource Control
  • Program memory 1020 also comprises software code executed by processor 1010 that enables apparatus 1000 to communicate with one or more other devices using other protocols or protocol layers, such as one or more of the PHY, MAC, RLC, PDCP, and RRC layer protocols standardized by 3GPP, or any other higher-layer protocols utilized in conjunction with radio network interface 1040 and core network interface 1050.
  • core network interface 1050 may comprise the SI interface and radio network interface 1050 may comprise the Uu interface, as standardized by 3GPP.
  • Program memory 1020 further comprises software code executed by processor 1010 to control the functions of apparatus 1000, including configuring and controlling various components such as radio network interface 1040 and core network interface 1050.
  • Data memory 1030 may comprise memory area for processor 1010 to store variables used in protocols, configuration, control, and other functions of apparatus 1000.
  • program memory 1020 and data memory 1030 may comprise non-volatile memory (e.g., flash memory, hard disk, etc.), volatile memory (e.g., static or dynamic RAM), network-based (e.g., "cloud") storage, or a combination thereof.
  • processor 1010 may comprise multiple individual processors (not shown), each of which implements a portion of the functionality described above. In such case, multiple individual processors may be commonly connected to program memory 1020 and data memory 1030 or individually connected to multiple individual program memories and/or data memories.
  • Radio network interface 1040 may comprise transmitters, receivers, signal processors, ASICs, antennas, beamforming units, and other circuitry that enables apparatus 1000 to communicate with other equipment such as, in some embodiments, a plurality of compatible user equipments (UEs).
  • UEs user equipments
  • radio network interface may comprise various protocols or protocol layers, such as the LTE PHY, MAC, RLC, PDCP, and RRC layer protocols standardized by 3GPP, improvements thereto such as described herein with reference to one of more Figs. 6 through 10, or any other higher- layer protocols utilized in conjunction with radio network interface 1040.
  • the radio network interface 1040 may comprise a PHY layer based on orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) technologies.
  • OFDM orthogonal frequency division multiplexing
  • OFDMA orthogonal frequency division multiple access
  • Core network interface 1050 may comprise transmitters, receivers, and other circuitry that enables apparatus 1000 to communicate with other equipment in a core network such as, in some embodiments, circuit-switched (CS) and/or packet-switched Core (PS) networks.
  • core network interface 1050 may comprise the SI interface standardized by 3GPP.
  • core network interface 1050 may comprise one or more interfaces to one or more SGWs, MMEs, SGSNs, GGSNs, and other physical devices that comprise functionality found in GERAN, UTRAN, E-UTRAN, and CDMA2000 core networks that are known to persons of ordinary skill in the art. In some embodiments, these one or more interfaces may be multiplexed together on a single physical interface.
  • lower layers of core network interface 1050 may comprise one or more of asynchronous transfer mode (ATM), Internet Protocol (IP)-over-Ethernet, SDH over optical fiber, Tl/El/PDH over a copper wire, microwave radio, or other wired or wireless transmission technologies known to those of ordinary skill in the art.
  • ATM asynchronous transfer mode
  • IP Internet Protocol
  • SDH over optical fiber
  • Tl/El/PDH over a copper wire, microwave radio, or other wired or wireless transmission technologies known to those of ordinary skill in the art.
  • OA&M interface 1060 may comprise transmitters, receivers, and other circuitry that enables apparatus 1000 to communicate with external networks, computers, databases, and the like for purposes of operations, administration, and maintenance of apparatus 1000 or other network equipment operably connected thereto.
  • Lower layers of OA&M interface 1060 may comprise one or more of asynchronous transfer mode (ATM), Internet Protocol (IP)-over-Ethernet, SDH over optical fiber, Tl/El/PDH over a copper wire, microwave radio, or other wired or wireless transmission technologies known to those of ordinary skill in the art.
  • ATM asynchronous transfer mode
  • IP Internet Protocol
  • SDH over optical fiber
  • Tl/El/PDH over a copper wire, microwave radio, or other wired or wireless transmission technologies known to those of ordinary skill in the art.
  • radio network interface 1040, core network interface 1050, and OA&M interface 1060 may be multiplexed together on a single physical interface, such as the examples listed above.
  • a device or apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such chip or chipset; this, however, does not exclude the possibility that a functionality of a device or apparatus, instead of being hardware implemented, be implemented as a software module such as a computer program or a computer program product comprising executable software code portions for execution or being run on a processor.
  • a device or apparatus may be regarded as a device or apparatus, or as an assembly of multiple devices and/or apparatuses, whether functionally in cooperation with or independently of each other.
  • devices and apparatuses may be implemented in a distributed fashion throughout a system, so long as the functionality of the device or apparatus is preserved. Such and similar principles are considered as known to a skilled person.

Landscapes

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

Abstract

Des modes de réalisation se rapportent à des procédés pour un équipement de réseau (par exemple, un eNB) demandant des informations CQI (informations de qualité de canal) d'un dispositif de communication (par exemple, un UE) afin de fournir au dispositif des informations qui identifient une ressource pour mesurer les informations CQI et le type, la quantité et/ou l'emplacement des informations de surdébit (par exemple, des signaux de référence de démodulation) dans la ressource. Des modes de réalisation comprennent également des procédés pour un dispositif de communication afin de recevoir, en conjonction avec une demande d'informations CQI, des informations identifiant une ressource utilisée pour mesurer des informations CQI et le type, la quantité et/ou l'emplacement des informations de surdébit dans la ressource. Le dispositif utilise les informations pour déterminer une ou plusieurs valeurs (par exemple, des indices d'informations CQI) et signale celles-ci à l'équipement de réseau. Des modes de réalisation comprennent des dispositifs ou des appareils de communication, un équipement ou un appareil de réseau et un support lisible par ordinateur réalisant un ou plusieurs desdits procédés.
PCT/CN2012/087155 2012-12-21 2012-12-21 Procédé pour déterminer des informations de qualité de canal (cqi) pour des blocs de ressources physiques ayant un surdébit réduit Ceased WO2014094294A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/087155 WO2014094294A1 (fr) 2012-12-21 2012-12-21 Procédé pour déterminer des informations de qualité de canal (cqi) pour des blocs de ressources physiques ayant un surdébit réduit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/087155 WO2014094294A1 (fr) 2012-12-21 2012-12-21 Procédé pour déterminer des informations de qualité de canal (cqi) pour des blocs de ressources physiques ayant un surdébit réduit

Publications (1)

Publication Number Publication Date
WO2014094294A1 true WO2014094294A1 (fr) 2014-06-26

Family

ID=50977576

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/087155 Ceased WO2014094294A1 (fr) 2012-12-21 2012-12-21 Procédé pour déterminer des informations de qualité de canal (cqi) pour des blocs de ressources physiques ayant un surdébit réduit

Country Status (1)

Country Link
WO (1) WO2014094294A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017134238A1 (fr) * 2016-02-05 2017-08-10 Telefonaktiebolaget Lm Ericsson (Publ) Technique de sélection d'une taille de blocs de transport dans un système de communication
CN109511170A (zh) * 2017-09-15 2019-03-22 维沃移动通信有限公司 一种PRB bundling size的指示方法和用户终端
US11489617B2 (en) 2017-01-05 2022-11-01 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Data transmission method and communication device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101686554A (zh) * 2008-09-24 2010-03-31 中兴通讯股份有限公司 系统调度的实现方法、装置、和终端
CN102378275A (zh) * 2010-08-13 2012-03-14 上海贝尔股份有限公司 一种获取增强的信道质量指示信息的方法和装置
CN102598760A (zh) * 2009-08-04 2012-07-18 松下电器产业株式会社 移动通信系统中的信道质量报告

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101686554A (zh) * 2008-09-24 2010-03-31 中兴通讯股份有限公司 系统调度的实现方法、装置、和终端
CN102598760A (zh) * 2009-08-04 2012-07-18 松下电器产业株式会社 移动通信系统中的信道质量报告
CN102378275A (zh) * 2010-08-13 2012-03-14 上海贝尔股份有限公司 一种获取增强的信道质量指示信息的方法和装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017134238A1 (fr) * 2016-02-05 2017-08-10 Telefonaktiebolaget Lm Ericsson (Publ) Technique de sélection d'une taille de blocs de transport dans un système de communication
US11115148B2 (en) 2016-02-05 2021-09-07 Telefonaktiebolaget Lm Ericsson (Publ) Technique for selecting a transport block size in a communication system
US11489617B2 (en) 2017-01-05 2022-11-01 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Data transmission method and communication device
CN109511170A (zh) * 2017-09-15 2019-03-22 维沃移动通信有限公司 一种PRB bundling size的指示方法和用户终端
CN109511170B (zh) * 2017-09-15 2021-11-23 维沃移动通信有限公司 一种PRB bundling size的指示方法和用户终端

Similar Documents

Publication Publication Date Title
US20250254009A1 (en) Code-Division Multiplexing (CDM) Groups for Multi-Source Transmission
JP7704789B2 (ja) 超高信頼性低遅延通信のための繰り返し
US20240276471A1 (en) Frequency-Domain Resource Allocation for Multi-Source Transmission
US11659528B2 (en) Coordinated wireless communications using multiple transmission time intervals
JP6648143B2 (ja) 拡張キャリアアグリゲーションにおけるｐｕｓｃｈを使用するアップリンク制御情報送信
US9241327B2 (en) LTE enhancements for small packet transmissions
RU2637779C2 (ru) Способ и устройство передачи/приема информации о состоянии канала
EP2599356B1 (fr) Procédés de signalisation pour planificateur de liaison descendante dynamique spécifique d'ue dans des systèmes ofdma
US20150319742A1 (en) Resource allocation methods for control channels
CN105227266A (zh) 传输上行控制信息的方法、用户设备和基站
US12063658B2 (en) Enhancement of logical channel prioritization in NR-U
CN110268665A (zh) 在无线通信系统中支持多个传输时间间隔、多个子载波间隔或多个处理时间的方法和装置
CN110710252B (zh) 无线通信系统中终端的d2d操作方法和使用所述方法的终端
US11552739B2 (en) Identification of hybrid ARQ (HARQ ID) and repetition window for autonomous repeated uplink transmissions
WO2013173967A1 (fr) Entrelacement pour canal de commande amélioré ayant des blocs de ressources physiques distribués
KR20240147724A (ko) 하이브리드 자동 반복 요청 피드백 재송신
WO2014094294A1 (fr) Procédé pour déterminer des informations de qualité de canal (cqi) pour des blocs de ressources physiques ayant un surdébit réduit

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: 12890524

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: 12890524

Country of ref document: EP

Kind code of ref document: A1