US20230217224A1 - Low bandwidth machine type communication in a long term evolution network - Google Patents
Low bandwidth machine type communication in a long term evolution network Download PDFInfo
- Publication number
- US20230217224A1 US20230217224A1 US18/182,175 US202318182175A US2023217224A1 US 20230217224 A1 US20230217224 A1 US 20230217224A1 US 202318182175 A US202318182175 A US 202318182175A US 2023217224 A1 US2023217224 A1 US 2023217224A1
- Authority
- US
- United States
- Prior art keywords
- region
- base station
- terminal
- common control
- identifying
- 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.)
- Pending
Links
- 238000004891 communication Methods 0.000 title claims abstract description 12
- 230000007774 longterm Effects 0.000 title abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 35
- 230000010363 phase shift Effects 0.000 claims 4
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 6
- 238000013459 approach Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000013507 mapping Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 241000760358 Enodes Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 241000700159 Rattus Species 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000007727 signaling mechanism Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
-
- 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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
-
- 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 signaling, i.e. of overhead other than pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
Definitions
- the present invention generally relates to the field of long term evolution network, and more particularly relates to machine type communication in a long term evolution network.
- LTE Long Term Evolution
- 3GPP Third Generation Partnership Project
- LTE is flexible on spectrum requirement point and can operate in different frequency bands.
- GSM Global System for Mobile Communications
- GPRS General Packet Radio Service
- Low cost LTE modems are critical for supporting and migrating M2M applications to LTE networks.
- the LTE baseband processing circuits and Radio Frequency (RF) components are critical components in the overall cost.
- RF Bill Of Material (BOM) recurring costs is not insignificant at all: the cost is about 4 dollars for a dual band GSM phone, 5 dollars for a tri band phone, and 6 dollars for a quad band phone. As a result BOM for RF components for LTE will be much higher.
- Dedicated MTC LTE carrier A dedicated narrowband carrier could be used for MTC devices.
- the advantage of this approach is that there are no specifications impacts in this approach.
- the Disadvantages are that there may not be available spectrum to deploy a dedicated MTC carrier.
- Some eNodeBs might not have the ability to support a narrowband carrier (e.g., as may be the case if it is necessary to split an existing carrier). This also goes against a key requirement of “Target operation of low-cost MTC devices and legacy devices on the same carrier” and use of a separate carrier for the support of low bandwidth MTC devices would be directly contradictory to this requirement.
- Relay Node The possibility of using a relay node where the Un bandwidth is (evidently) the same as that of the legacy carrier, but the Uu bandwidth is a low bandwidth that is compatible with MTC devices.
- the use of relays was originally proposed from the perspective of bandwidth reduction, they might also be useful from the perspective of improving coverage for any MTC devices that have a lower transmit power capability or for single receive antenna devices.
- Advantages are that there are no impacts on the legacy eNode B and the potential to improve uplink and downlink coverage for cost reduced devices that have either a single receive chain or low transmit power.
- the disadvantages are that the deployment of extra hardware is required.
- Existing relay nodes would not necessarily support this functionality and may need to be upgraded or replaced. The complexity of existing relay nodes would be increased. MTC devices in the coverage area of the donor eNode-B (as opposed to a relay node) would not be supported by the low bandwidth Uu link.
- FIG. 1 is a block diagram illustrating an exemplary long term evolution (LTE) network system, according to one embodiment.
- LTE long term evolution
- FIG. 2 illustrates a general overview of the LTE protocol stack for communications between a transmitting terminal and a receiving terminal in LTE systems.
- FIG. 3 A is a schematic representation illustrating co-existence of 1.25 MHz frequency region within 20 MHz frequency band, according to one embodiment.
- FIG. 3 B is a schematic representation illustrating scheduling of data bits over a 1.25 MHz frequency region in a radio frame, according to one embodiment.
- FIG. 4 is a flow diagram illustrating an exemplary method of establishing a radio resource connection with a low bandwidth MTC device over a dedicated frequency region, according to one embodiment.
- FIG. 5 is a process flowchart illustrating an exemplary method of communicating data bits over a 1.25 MHz frequency region dedicated for low bandwidth MTC devices in a LTE network, according to one embodiment.
- FIG. 6 is a schematic representation illustrating a process of mapping data bits to appropriate resource elements of a physical channel, according to one embodiment.
- FIG. 7 is a process flow chart illustrating an exemplary method of communicating data bits over a 1.25 MHz frequency region dedicated for low bandwidth MTC devices in the LTE network, according to another embodiment.
- FIG. 8 is a schematic representation illustrating of an exemplary radio frame containing a MBSFN subframe with a MTC scheduling region, according to one embodiment.
- FIG. 9 is a process flow chart illustrating an exemplary method of processing the received data bits by a low bandwidth MTC device, according to one embodiment.
- FIG. 10 is a schematic representation illustrating the network entity configures a dedicated search space for the MTC device upon successful establishment of the radio resource connection.
- the present invention provides a method and system for enabling machine type communication over a narrow frequency region within a larger bandwidth cell.
- FIG. 1 is a block diagram illustrating an exemplary long term evolution (LTE) network system 100 , according to one embodiment.
- the LTE network system 100 includes a network entity 102 , low bandwidth MTC devices 104 A-N, and legacy devices 106 A-N.
- the network entity 102 is wirelessly connected to the low bandwidth MTC devices 104 A-N and the legacy devices 106 A-N via the communication network 110 .
- Each of the MTC devices 104 A-N includes a low cost LTE modem 112 configured for operating in narrow bandwidth of 1.25 mega-Hertz (MHz).
- the network entity 102 may comprise a base station in an LTE network, sometimes referred to as an Evolved Node B (eNodeB).
- the network entity 102 includes an LTE protocol stack 108 .
- the LTE protocol stack 108 is a layered protocol stack. Each layer of the protocol stack 108 represents a set of protocols or functions needed to communicate over the network 110 .
- the LTE protocol stack 108 includes a packet data convergence protocol (PDCP) layer 202 , a radio link control (RLC) layer 204 , a medium access control (MAC) layer 206 , and the physical (PHY) layer 208 .
- PDCP packet data convergence protocol
- RLC radio link control
- MAC medium access control
- PHY physical layer 208 .
- the LTE protocol stack 108 is typically implemented by a specially programmed processor.
- User plane data in the form of IP packets to be transmitted enters the PDCP layer 202 where the IP headers may be compressed to reduce the number of bits transmitted over the air interface.
- the PDCP layer 202 also performs ciphering and deciphering of the IP packets for security.
- the RLC layer 204 ensures almost error free, in-sequence delivery of compressed IP packets to a PDCP layer at the receiving terminal, which is needed for certain types of communication.
- the RLC layer 204 segments and/or concatenates compressed IP packets received over radio bearers from the PDCP layer 202 to create RLC protocol data units (PDUs).
- PDUs RLC protocol data units
- the MAC layer 206 maps RLC PDUs received from the RLC layer 204 on various logical channels to corresponding transport channels (also referred to as physical channels).
- the MAC layer 206 is also responsible for uplink and downlink scheduling.
- the MAC PDUs are fed by the MAC layer 206 to the PHY layer 208 .
- the PHY layer 208 handles coding/decoding, modulation/demodulation, interleaving, and mapping of data bits prior to transmission of one or more PHY layer PDUs.
- the network entity 102 allocates a radio access channel (RACH) region in a frequency region dedicated for low bandwidth MTC devices (herein after referred to as ‘1.25 MHz frequency region’) to the MTC devices 104 A-N. Then, the network entity 102 transmits a MTC specific information message indicating the allocated RACH region and a common search space to the MTC devices 104 A-N. In response, the MTC devices 104 A-N send a RACH message on the RACH region in the 1.25 MHz frequency region. As a consequence, the network entity 102 establishes a Radio Resource Connection with the MTC device 104 A and configures a dedicated search space for the MTC devices 104 A-N upon successful establishment of the radio resource connection. Furthermore, the network entity 102 allocates resources for the MTC devices 104 A-N within the 1.25 MHz frequency region and indicates the resources allocated within the 1.25 MHz frequency region to the MTC devices 104 A-N.
- RACH radio access channel
- the PHY layer 208 maps the interleaved data bits intended for the MTC devices 104 A-N to respective resource elements of a physical channel(s) belonging to 1.25 MHz frequency region in a 20 MHz frequency band.
- the PHY layer 208 also maps the interleaved data bits intended for the legacy devices 106 A-N to respective resource elements of the physical channel belonging to a frequency region outside the 1.25 MHz frequency region and within the 20 MHz frequency band.
- the eNodeB 102 transmits the data bits mapped to the respective resource elements over a radio frequency corresponding to the 1.25 MHz frequency region and the region outside the 1.25 MHz frequency region to the MTC devices 104 A-N and the legacy devices 106 A-N respectively.
- FIG. 3 A is a schematic representation 300 illustrating co-existence of 1.25 MHz frequency region within 20 MHz frequency band, according to one embodiment.
- the eNodeB 102 schedules data for the MTC devices 104 A-N on narrow bandwidth of 1.25 MHz and the legacy devices 106 A-N are scheduled on a region outside the 1.25 MHz frequency region and within 20 MHz.
- FIG. 3 B is a schematic representation 350 illustrating scheduling of data bits (e.g., MTC data) over a 1.25 MHz frequency region in a radio frame, according to one embodiment.
- the eNodeB 102 schedules control channels (e.g., PDCCH) in resource elements belonging to 1.25 MHz frequency region of a first three OFDM symbols of a subframe.
- control channels e.g., PDCCH
- resource channels e.g., Packet Data Control Channel (PDCCH)
- PDCCH scheduling could be based on Downlink Control Information (DCI) formats or on blind decoding.
- DCI Downlink Control Information
- CCEs new control channel elements
- different dedicated search spaces are defined to reduce the decoding combinations for the blind decoding case as illustrated in FIG. 10 .
- PCFICH and PHICH are scheduled in the 1.25 MHz frequency region. The advantage of this approach is that one set is sufficient for both MTC devices and legacy devices and also frequency diversity is reduced.
- a second set of PCFICH and PHICH are defined only for the low bandwidth MTC devices 104 A-N.
- PHICH is defined for the low bandwidth MTC devices 104 A-N and no PCFICH is used.
- FIG. 4 is a flow diagram 400 illustrating an exemplary method of establishing a radio resource connection with a low bandwidth MTC device 104 A over a dedicated frequency region, according to one embodiment.
- the network entity 102 allocates a radio access channel (RACH) region in a frequency region dedicated for low bandwidth MTC devices (herein after referred to as ‘1.25 MHz frequency region’) to the MTC device 104 A.
- the network entity 102 transmits a MTC specific information message indicating the allocated RACH region and a common search space to the MTC device 104 A.
- RACH radio access channel
- the MTC device 104 A sends a RACH message on the RACH region in the 1.25 MHz frequency region.
- the network entity 104 A establishes a Radio Resource Connection with the MTC device 104 A.
- the network entity 102 configures a dedicated search space for the MTC device 104 A upon successful establishment of the radio resource connection as shown in FIG. 10 .
- the network entity 102 allocates resources for the MTC device 104 A within the 1.25 MHz frequency region.
- the resources may include resource elements in the physical channel falling within the 1.25 MHz frequency region.
- resource elements in an entire radio frame falling within the 1.25 MHz frequency region are allocated to the MTC device 104 A and resource elements falling outside the 1.25 MHz frequency region but falling within 20 MHz frequency band are allocated to legacy devices 106 A-N as shown in FIG. 6 .
- resource elements in one of subframes of a radio frame are allocated exclusively for low bandwidth MTC devices 104 A-N while the resource elements in remaining subframes of the radio frame are allocated to the legacy devices 106 A-N as illustrated in FIG. 8 .
- a MTC scheduling region(s) is defined in the subframe and resource elements falling within the MTC scheduling region are allocated to the MTC devices 104 A-N.
- the eNodeB 102 allocates a MTC scheduling region in a subframe of a radio frame exclusively for the low bandwidth MTC devices 104 A-N, where the radio frame is of 20 MHz bandwidth and the MTC scheduling region in the allocated subframe is having a bandwidth of 1.25 MHz within 20 MHz.
- a MBSFN subframe in a radio frame is allocated to the MTC devices 104 A-N.
- a blank subframe in the radio frame is allocated to the MTC devices 104 A-N.
- the eNodeB 102 indicates allocation of MTC scheduling region in the MBSFN/blank subframe through a master information block (MIB) message and indicates remaining information through a newly defined system information message. Also, the eNodeB 102 also notifies specific scheduling of the newly defined system information message in the MIB message when such scheduling is not known to the MTC devices 104 A-N. Additionally, the eNodeB 102 indicates whether the eNodeB 102 supports multiple bandwidths to the MTC devices 104 A-N using a bit indicator in the MIB message or the system information block message. Further, the eNodeB 102 indicates bandwidths supported for the low cost MTC devices 104 A-N via a dl_MTC-bandwidth enumerated string as shown in Appendix ‘A’ and Appendix ‘B’.
- MIB master information block
- the network entity 102 sends resources allocated within the 1.25 MHz frequency region to the MTC device 104 A.
- the allocation of the MTC scheduling region is indicated to the MTC devices 104 A-N in a master information block message or a system information block message.
- FIG. 5 is a process flowchart 500 illustrating an exemplary method of communicating data bits over a 1.25 MHz frequency region dedicated for low bandwidth MTC devices 104 A-N in an LTE network, according to one embodiment. Particularly, FIG. 5 illustrates a process steps performed at the PHY layer 208 .
- data bits received from the MAC layer 206 are encoded using an appropriate encoding technique.
- the encoded data bits are interleaved and modulated using a configured modulation scheme (e.g., QPSK modulation scheme).
- a configured modulation scheme e.g., QPSK modulation scheme
- the data bits in resource elements of a logical channel are mapped to resource elements of a physical channel.
- the physical channel contains a first set resource elements which belong to 1.25 MHz frequency region and a second set of resource elements which belong to a region outside 1.25 MHz within a 20 MHz frequency band.
- the data bits in the resource elements of the physical channel :
- N RB HO The parameter pusch-Hopping Offset (N RB HO ) is provided by the MAC layer 206 .
- the size N RB sb of each sub-band is given by:
- the hopping function ⁇ hop (i) and the function ⁇ m (i) are given by:
- ⁇ hop ( ⁇ 1) 0 and the pseudo-random sequence c(i) is given by section 7.2 and CURRENT_TX_NB indicates the transmission number for the transport block transmitted in slot n s .
- the data bits intended for the legacy devices 106 A-N but mapped to the first set of resource elements of the MTC devices 104 A-N are identified.
- the data bits intended for the MTC device 104 A-N but mapped to the second set of resource elements of the legacy devices 106 A-N are identified.
- the data bits intended for the legacy devices 106 A-N are remapped to the second resource elements and the data bits intended for the MTC devices 104 A-N are remapped to the first set of resource elements.
- the eNodeB 102 remaps data bits intended for the legacy devices 106 A-N to the resource elements outside the 1.25 MHz frequency region as follows:
- n prb20 fn 20 ( fn ⁇ 1 1.25 ( n prb1.25 ))
- n prb1.25 is Physical Resource Block (PRB) for 1.25 MHz frequency region calculated using the conventional formula
- fn 20 is the conventional formula for 20 MHz frequency band
- fn ⁇ 1 1.25 is the reverse conventional formula (i.e., the reverse mapping from the physical channel to logical channels).
- the data bits mapped to the respective resource elements are transmitted over a radio frequency corresponding to the 1.25 MHz frequency region and the region outside the 1.25 MHz frequency region to the MTC devices 104 A-N and the legacy devices 106 A-N respectively.
- FIG. 6 is a schematic representation 600 illustrating a process of mapping data bits to appropriate resource elements of a physical channel, according to one embodiment.
- a logical channel 602 contains data bits 604 A-J in resource elements 606 A-J.
- the data bits 604 A-J are intended for the MTC devices 104 A-N and the logical devices 106 A-N.
- a physical channel 606 contains a first set of resource elements 608 A-D which corresponds to the 1.25 MHz frequency region and a second set of resource elements 610 A-F which corresponds to region outside the 1.25 MHz frequency region in the 20 MHz frequency band.
- the eNodeB 102 Prior to transmitting the data bits 604 A-J, the eNodeB 102 maps the modulated data bits 604 A-J to the resource elements 608 A-D, 610 A-F of the physical channel 606 . It can be seen that the data bits 604 B and 604 I are mapped to the resource elements 608 A and 608 C while the data bits 604 D and 604 F are mapped to the resource elements 610 B and 610 F. However, the data bits 604 B and 604 I should have been mapped to the resource elements 610 B and 610 F while the data bits 604 D and 604 F should have been mapped to the resource elements 608 A and 608 C.
- the data bits 604 D and 604 F are intended for the MTC devices 104 A-N and should be transmitted over 1.25 MHz frequency region.
- the data bits 604 B and 604 I are intended for the legacy devices 104 A-N and should be transmitted over frequencies falling outside the 1.25 MHz frequency region.
- the eNodeB 102 identifies wrongly mapped data bits (i.e., data bits 604 B, 604 D, 604 F, and 604 I) and remaps the data bits 604 D and 604 F to the resource elements 608 A and 608 C, and the data bits 604 B and 604 I to the resource elements 610 B and 610 F.
- the data bits 604 D-G are correctly mapped to resource elements 608 A-D belonging to the 1.25 MHz frequency region reserved for the MTC devices 104 A-N.
- FIG. 7 is a process flow chart 700 illustrating an exemplary method of communicating data bits over a 1.25 MHz frequency region dedicated for low bandwidth MTC devices 104 A-N in the LTE network, according to another embodiment.
- data bits received from the MAC layer 206 are encoded using an appropriate encoding technique.
- the encoded data bits are interleaved and modulated using a configured modulation scheme (e.g., QPSK modulation scheme).
- data bits intended for the MTC devices 104 A-N are mapped to resource elements in the MTC scheduling region of the subframe.
- the data bits mapped to the resource elements are transmitted to the MTC devices 104 A-N over a radio frequency corresponding to the MTC scheduling region.
- FIG. 8 is a schematic representation illustrating of an exemplary radio frame 800 containing a MBSFN subframe 802 with a MTC scheduling region 804 , according to one embodiment.
- the radio frame of 20 MHz contains a plurality of subframes with a MBSFN subframe 802 .
- the MBSFN subframe 802 includes a MTC scheduling region 804 of 1.25 MHz.
- the eNodeB 102 maps data bits to resource elements of the MBSFN subframe 802 on the entire 20 MHz bandwidth.
- the eNode B 102 maps data bits intended for MTC devices 104 A-N to resource elements belonging 1.25 MHz frequency region in the MBSFN subframe 802 .
- FIG. 9 is a process flow chart 900 illustrating an exemplary method of processing the received data bits by the low bandwidth MTC device 104 A, according to one embodiment.
- step 902 data bits transmitted over the radio frequency corresponding to the 1.25 MHz frequency region is received by the MTC device 104 A.
- step 904 the received data bits that are mapped to the resource elements in the 1.25 MHz frequency region of the physical channel are re-mapped to the respective resource elements of the logical channel.
- the data bits mapped to the respective resource elements of the logical channel are demodulated using an appropriate demodulation scheme.
- the demodulated data bits mapped to the respective resource elements of the logical channel are decoded using an appropriate decoding technique and sent to the MAC layer 206 for further processing.
- the eNodeB 102 can transmit data to the MTC devices 104 A-N by bundling the MTC devices 104 A-N into a paging cycle. If the MTC devices 104 A-N are bundled into a paging cycle, the eNodeB 102 indicates to the MTC devices 104 A-N in dedicated signalling mechanism (e.g., dedicated non-access stratum (NAS) message).
- dedicated signalling mechanism e.g., dedicated non-access stratum (NAS) message.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a method and system for enabling machine type communication in a long term evolution (LTE) network environment. In one embodiment, a Physical (PHY) layer of an LTE protocol stack maps data bits in resource elements of a logical channel to resource elements of a physical channel. The PHY layer identifies the data bits intended for legacy devices but mapped to a first set of resource elements of machine type communication (MTC) devices and the data bits intended for the MTC device but mapped to the second set of resource elements of the legacy devices. Accordingly, the PHY layer remaps the data bits intended for the legacy devices to the second set of resource elements and the data bits intended for the MTC devices to the first set of resource elements prior to transmission.
Description
- This application is a continuation of U.S. patent application Ser. No. 17/135,674 filed on Dec. 28, 2020, which is a continuation of U.S. patent application Ser. No. 15/598,190 filed on May 17, 2017, now U.S. Pat. No. 10,880,713 issued on Dec. 29, 2020, which is a continuation of U.S. patent application Ser. No. 14/359,276 filed on May 19, 2014, now U.S. Pat. No. 9,686,633, issued on Jun. 20, 2017, which is a 371 National Stage of International Application No. PCT/KR2012/009802 filed on Nov. 19, 2012, which claims priority to India Patent Application No. 3967/CHE/2011 filed on Nov. 18, 2011, and India Patent Application No. 3967/CHE/2011 filed on Nov. 19, 2012, the disclosures of which are herein incorporated by reference in their entirety.
- The present invention generally relates to the field of long term evolution network, and more particularly relates to machine type communication in a long term evolution network.
- Long Term Evolution (LTE) is a technology that is being standardized by Third Generation Partnership Project (3GPP) forum as part of the 4th Generation wireless network evolution. LTE is flexible on spectrum requirement point and can operate in different frequency bands. The list of flexibility requirement LTE spectrum allocations (1.25, 1.6, 2.5, 5, 10, 15 and 20 MHz) and furthermore, LTE can also operate in unpaired as well as paired spectrum. From a user equipment perspective, it is mandatory in LTE for user equipments to support 20 MHz frequency band.
- As more and more MTC devices are deployed in this field, this naturally increases the reliance on Global System for Mobile Communications (GSM)/General Packet Radio Service (GPRS) networks. This reliance will cost operators not only in terms of maintaining multiple Radio Access Technology (RATs), and also prevents operators from reaping the maximum benefit out of their spectrum (given the non-optimal spectrum efficiency of GSM/GPRS). Because usage of high number of MTC devices, the overall resource they need for service provision may be correspondingly significant and inefficiently assigned.
- Low cost LTE modems are critical for supporting and migrating M2M applications to LTE networks. The LTE baseband processing circuits and Radio Frequency (RF) components are critical components in the overall cost. RF Bill Of Material (BOM) recurring costs is not insignificant at all: the cost is about 4 dollars for a dual band GSM phone, 5 dollars for a tri band phone, and 6 dollars for a quad band phone. As a result BOM for RF components for LTE will be much higher.
- Currently approaches for achieving low cost MTC devices in LTE networks are as follows:
- 1) Dedicated MTC LTE carrier: A dedicated narrowband carrier could be used for MTC devices. The advantage of this approach is that there are no specifications impacts in this approach. The Disadvantages are that there may not be available spectrum to deploy a dedicated MTC carrier. Some eNodeBs might not have the ability to support a narrowband carrier (e.g., as may be the case if it is necessary to split an existing carrier). This also goes against a key requirement of “Target operation of low-cost MTC devices and legacy devices on the same carrier” and use of a separate carrier for the support of low bandwidth MTC devices would be directly contradictory to this requirement.
- 2) Relay Node: The possibility of using a relay node where the Un bandwidth is (evidently) the same as that of the legacy carrier, but the Uu bandwidth is a low bandwidth that is compatible with MTC devices. Although the use of relays was originally proposed from the perspective of bandwidth reduction, they might also be useful from the perspective of improving coverage for any MTC devices that have a lower transmit power capability or for single receive antenna devices. Advantages are that there are no impacts on the legacy eNode B and the potential to improve uplink and downlink coverage for cost reduced devices that have either a single receive chain or low transmit power. The disadvantages are that the deployment of extra hardware is required. Existing relay nodes would not necessarily support this functionality and may need to be upgraded or replaced. The complexity of existing relay nodes would be increased. MTC devices in the coverage area of the donor eNode-B (as opposed to a relay node) would not be supported by the low bandwidth Uu link.
-
FIG. 1 is a block diagram illustrating an exemplary long term evolution (LTE) network system, according to one embodiment. -
FIG. 2 illustrates a general overview of the LTE protocol stack for communications between a transmitting terminal and a receiving terminal in LTE systems. -
FIG. 3A is a schematic representation illustrating co-existence of 1.25 MHz frequency region within 20 MHz frequency band, according to one embodiment. -
FIG. 3B is a schematic representation illustrating scheduling of data bits over a 1.25 MHz frequency region in a radio frame, according to one embodiment. -
FIG. 4 is a flow diagram illustrating an exemplary method of establishing a radio resource connection with a low bandwidth MTC device over a dedicated frequency region, according to one embodiment. -
FIG. 5 is a process flowchart illustrating an exemplary method of communicating data bits over a 1.25 MHz frequency region dedicated for low bandwidth MTC devices in a LTE network, according to one embodiment. -
FIG. 6 is a schematic representation illustrating a process of mapping data bits to appropriate resource elements of a physical channel, according to one embodiment. -
FIG. 7 is a process flow chart illustrating an exemplary method of communicating data bits over a 1.25 MHz frequency region dedicated for low bandwidth MTC devices in the LTE network, according to another embodiment. -
FIG. 8 is a schematic representation illustrating of an exemplary radio frame containing a MBSFN subframe with a MTC scheduling region, according to one embodiment. -
FIG. 9 is a process flow chart illustrating an exemplary method of processing the received data bits by a low bandwidth MTC device, according to one embodiment. -
FIG. 10 is a schematic representation illustrating the network entity configures a dedicated search space for the MTC device upon successful establishment of the radio resource connection. - The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.
- The present invention provides a method and system for enabling machine type communication over a narrow frequency region within a larger bandwidth cell. In the following detailed description of the embodiments of the invention, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims.
-
FIG. 1 is a block diagram illustrating an exemplary long term evolution (LTE)network system 100, according to one embodiment. TheLTE network system 100 includes anetwork entity 102, lowbandwidth MTC devices 104A-N, andlegacy devices 106A-N. Thenetwork entity 102 is wirelessly connected to the lowbandwidth MTC devices 104A-N and thelegacy devices 106A-N via thecommunication network 110. - Each of the
MTC devices 104A-N includes a lowcost LTE modem 112 configured for operating in narrow bandwidth of 1.25 mega-Hertz (MHz). Thenetwork entity 102 may comprise a base station in an LTE network, sometimes referred to as an Evolved Node B (eNodeB). Thenetwork entity 102 includes anLTE protocol stack 108. TheLTE protocol stack 108 is a layered protocol stack. Each layer of theprotocol stack 108 represents a set of protocols or functions needed to communicate over thenetwork 110. - Referring to
FIG. 2 , theLTE protocol stack 108 includes a packet data convergence protocol (PDCP) layer 202, a radio link control (RLC) layer 204, a medium access control (MAC) layer 206, and the physical (PHY) layer 208. TheLTE protocol stack 108 is typically implemented by a specially programmed processor. - User plane data in the form of IP packets to be transmitted enters the PDCP layer 202 where the IP headers may be compressed to reduce the number of bits transmitted over the air interface. The PDCP layer 202 also performs ciphering and deciphering of the IP packets for security. The RLC layer 204 ensures almost error free, in-sequence delivery of compressed IP packets to a PDCP layer at the receiving terminal, which is needed for certain types of communication. At the transmitting terminal, the RLC layer 204 segments and/or concatenates compressed IP packets received over radio bearers from the PDCP layer 202 to create RLC protocol data units (PDUs).
- The MAC layer 206 maps RLC PDUs received from the RLC layer 204 on various logical channels to corresponding transport channels (also referred to as physical channels). The MAC layer 206 is also responsible for uplink and downlink scheduling. The MAC PDUs are fed by the MAC layer 206 to the PHY layer 208. The PHY layer 208 handles coding/decoding, modulation/demodulation, interleaving, and mapping of data bits prior to transmission of one or more PHY layer PDUs.
- According to one embodiment, the
network entity 102 allocates a radio access channel (RACH) region in a frequency region dedicated for low bandwidth MTC devices (herein after referred to as ‘1.25 MHz frequency region’) to theMTC devices 104A-N. Then, thenetwork entity 102 transmits a MTC specific information message indicating the allocated RACH region and a common search space to theMTC devices 104A-N. In response, theMTC devices 104A-N send a RACH message on the RACH region in the 1.25 MHz frequency region. As a consequence, thenetwork entity 102 establishes a Radio Resource Connection with theMTC device 104A and configures a dedicated search space for theMTC devices 104A-N upon successful establishment of the radio resource connection. Furthermore, thenetwork entity 102 allocates resources for theMTC devices 104A-N within the 1.25 MHz frequency region and indicates the resources allocated within the 1.25 MHz frequency region to theMTC devices 104A-N. - Prior to transmission of data, the PHY layer 208 maps the interleaved data bits intended for the
MTC devices 104A-N to respective resource elements of a physical channel(s) belonging to 1.25 MHz frequency region in a 20 MHz frequency band. The PHY layer 208 also maps the interleaved data bits intended for thelegacy devices 106A-N to respective resource elements of the physical channel belonging to a frequency region outside the 1.25 MHz frequency region and within the 20 MHz frequency band. Accordingly, theeNodeB 102 transmits the data bits mapped to the respective resource elements over a radio frequency corresponding to the 1.25 MHz frequency region and the region outside the 1.25 MHz frequency region to theMTC devices 104A-N and thelegacy devices 106A-N respectively. -
FIG. 3A is aschematic representation 300 illustrating co-existence of 1.25 MHz frequency region within 20 MHz frequency band, according to one embodiment. According to the present invention, theeNodeB 102 schedules data for theMTC devices 104A-N on narrow bandwidth of 1.25 MHz and thelegacy devices 106A-N are scheduled on a region outside the 1.25 MHz frequency region and within 20 MHz. -
FIG. 3B is aschematic representation 350 illustrating scheduling of data bits (e.g., MTC data) over a 1.25 MHz frequency region in a radio frame, according to one embodiment. As depicted, theeNodeB 102 schedules control channels (e.g., PDCCH) in resource elements belonging to 1.25 MHz frequency region of a first three OFDM symbols of a subframe. Also, theeNodeB 102 schedules resource channels (e.g., Packet Data Control Channel (PDCCH)) in resource elements of 1.25 MHz frequency region starting from the fourth OFDM symbol of the subframe. PDCCH scheduling could be based on Downlink Control Information (DCI) formats or on blind decoding. If the PDCCH scheduling is based on blind decoding, new control channel elements (CCEs) are defined to reduce decoding combinations (i.e., 1, 2, 4, 8 CCE aggregation in LTE, each starting on mod N boundary where N=1, 2, 4, 8). Also, different dedicated search spaces are defined to reduce the decoding combinations for the blind decoding case as illustrated inFIG. 10 . Also, in the present invention, PCFICH and PHICH are scheduled in the 1.25 MHz frequency region. The advantage of this approach is that one set is sufficient for both MTC devices and legacy devices and also frequency diversity is reduced. In another embodiment, a second set of PCFICH and PHICH are defined only for the lowbandwidth MTC devices 104A-N. In yet another embodiment, PHICH is defined for the lowbandwidth MTC devices 104A-N and no PCFICH is used. -
FIG. 4 is a flow diagram 400 illustrating an exemplary method of establishing a radio resource connection with a lowbandwidth MTC device 104A over a dedicated frequency region, according to one embodiment. At step 402, thenetwork entity 102 allocates a radio access channel (RACH) region in a frequency region dedicated for low bandwidth MTC devices (herein after referred to as ‘1.25 MHz frequency region’) to theMTC device 104A. Atstep 404, thenetwork entity 102 transmits a MTC specific information message indicating the allocated RACH region and a common search space to theMTC device 104A. - At
step 406, theMTC device 104A sends a RACH message on the RACH region in the 1.25 MHz frequency region. Atstep 408, thenetwork entity 104A establishes a Radio Resource Connection with theMTC device 104A. Atstep 410, thenetwork entity 102 configures a dedicated search space for theMTC device 104A upon successful establishment of the radio resource connection as shown inFIG. 10 . - At
step 412, thenetwork entity 102 allocates resources for theMTC device 104A within the 1.25 MHz frequency region. For example, the resources may include resource elements in the physical channel falling within the 1.25 MHz frequency region. In one embodiment, resource elements in an entire radio frame falling within the 1.25 MHz frequency region are allocated to theMTC device 104A and resource elements falling outside the 1.25 MHz frequency region but falling within 20 MHz frequency band are allocated tolegacy devices 106A-N as shown inFIG. 6 . - In another embodiment, resource elements in one of subframes of a radio frame are allocated exclusively for low
bandwidth MTC devices 104A-N while the resource elements in remaining subframes of the radio frame are allocated to thelegacy devices 106A-N as illustrated inFIG. 8 . In this embodiment, a MTC scheduling region(s) is defined in the subframe and resource elements falling within the MTC scheduling region are allocated to theMTC devices 104A-N. For example, when an evolvedNode B 102 supports multi-media broadcast multicast over single frequency network (MBSFN) service, theeNodeB 102 allocates a MTC scheduling region in a subframe of a radio frame exclusively for the lowbandwidth MTC devices 104A-N, where the radio frame is of 20 MHz bandwidth and the MTC scheduling region in the allocated subframe is having a bandwidth of 1.25 MHz within 20 MHz. In one exemplary implementation, a MBSFN subframe in a radio frame is allocated to theMTC devices 104A-N. In another exemplary implementation, a blank subframe in the radio frame is allocated to theMTC devices 104A-N. The eNodeB 102 indicates allocation of MTC scheduling region in the MBSFN/blank subframe through a master information block (MIB) message and indicates remaining information through a newly defined system information message. Also, theeNodeB 102 also notifies specific scheduling of the newly defined system information message in the MIB message when such scheduling is not known to theMTC devices 104A-N. Additionally, theeNodeB 102 indicates whether theeNodeB 102 supports multiple bandwidths to theMTC devices 104A-N using a bit indicator in the MIB message or the system information block message. Further, theeNodeB 102 indicates bandwidths supported for the lowcost MTC devices 104A-N via a dl_MTC-bandwidth enumerated string as shown in Appendix ‘A’ and Appendix ‘B’. - At
step 414, thenetwork entity 102 sends resources allocated within the 1.25 MHz frequency region to theMTC device 104A. For example, the allocation of the MTC scheduling region is indicated to theMTC devices 104A-N in a master information block message or a system information block message. -
FIG. 5 is aprocess flowchart 500 illustrating an exemplary method of communicating data bits over a 1.25 MHz frequency region dedicated for lowbandwidth MTC devices 104A-N in an LTE network, according to one embodiment. Particularly,FIG. 5 illustrates a process steps performed at the PHY layer 208. Atstep 502, data bits received from the MAC layer 206 are encoded using an appropriate encoding technique. At step 504, the encoded data bits are interleaved and modulated using a configured modulation scheme (e.g., QPSK modulation scheme). - At
step 506, the data bits in resource elements of a logical channel are mapped to resource elements of a physical channel. It can be noted that, the physical channel contains a first set resource elements which belong to 1.25 MHz frequency region and a second set of resource elements which belong to a region outside 1.25 MHz within a 20 MHz frequency band. For example, the data bits in the resource elements of the physical channel: -
- where nVRB is obtained from scheduling grant. The parameter pusch-Hopping Offset (NRB HO) is provided by the MAC layer 206. The size NRB sb of each sub-band is given by:
-
- where, the number of sub-bands Nsb is given by the MAC layer 206. The function ƒm(i)∈{0,1} determines whether mirroring is used or not. The parameter Hopping-mode determines if hopping is “inter-subframe” or “intra and inter-subframe”.
The hopping function ƒhop(i) and the function ƒm (i) are given by: -
- where ƒhop (−1)=0 and the pseudo-random sequence c(i) is given by section 7.2 and CURRENT_TX_NB indicates the transmission number for the transport block transmitted in slot ns. The pseudo-random sequence generator shall be initialised with cinit=NID cell for
frame structure type 1 and cinit=29·(nf mod 4)+NID cell for frame structure type 2 at the start of each frame. - At
step 508, the data bits intended for thelegacy devices 106A-N but mapped to the first set of resource elements of theMTC devices 104A-N are identified. Similarly, atstep 508, the data bits intended for theMTC device 104A-N but mapped to the second set of resource elements of thelegacy devices 106A-N are identified. Atstep 510, the data bits intended for thelegacy devices 106A-N are remapped to the second resource elements and the data bits intended for theMTC devices 104A-N are remapped to the first set of resource elements. In one embodiment, theeNodeB 102 remaps data bits intended for thelegacy devices 106A-N to the resource elements outside the 1.25 MHz frequency region as follows: - If nprb1.25==nprb20,
-
n prb20 =fn 20(fn −1 1.25(n prb1.25)) - where, nprb1.25 is Physical Resource Block (PRB) for 1.25 MHz frequency region calculated using the conventional formula, fn20 is the conventional formula for 20 MHz frequency band, and fn−1 1.25 is the reverse conventional formula (i.e., the reverse mapping from the physical channel to logical channels).
- At
step 512, the data bits mapped to the respective resource elements are transmitted over a radio frequency corresponding to the 1.25 MHz frequency region and the region outside the 1.25 MHz frequency region to theMTC devices 104A-N and thelegacy devices 106A-N respectively. -
FIG. 6 is aschematic representation 600 illustrating a process of mapping data bits to appropriate resource elements of a physical channel, according to one embodiment. As depicted, alogical channel 602 contains data bits 604A-J in resource elements 606A-J. The data bits 604A-J are intended for theMTC devices 104A-N and thelogical devices 106A-N. Aphysical channel 606 contains a first set of resource elements 608A-D which corresponds to the 1.25 MHz frequency region and a second set ofresource elements 610A-F which corresponds to region outside the 1.25 MHz frequency region in the 20 MHz frequency band. - Prior to transmitting the data bits 604A-J, the
eNodeB 102 maps the modulated data bits 604A-J to the resource elements 608A-D, 610A-F of thephysical channel 606. It can be seen that thedata bits 604B and 604I are mapped to theresource elements 608A and 608C while thedata bits 604D and 604F are mapped to the resource elements 610B and 610F. However, thedata bits 604B and 604I should have been mapped to the resource elements 610B and 610F while thedata bits 604D and 604F should have been mapped to theresource elements 608A and 608C. This is because, thedata bits 604D and 604F are intended for theMTC devices 104A-N and should be transmitted over 1.25 MHz frequency region. Similarly, thedata bits 604B and 604I are intended for thelegacy devices 104A-N and should be transmitted over frequencies falling outside the 1.25 MHz frequency region. - In this scenario, the
eNodeB 102 identifies wrongly mapped data bits (i.e.,data bits data bits 604D and 604F to theresource elements 608A and 608C, and thedata bits 604B and 604I to the resource elements 610B and 610F. Thus, the data bits 604D-G are correctly mapped to resource elements 608A-D belonging to the 1.25 MHz frequency region reserved for theMTC devices 104A-N. -
FIG. 7 is aprocess flow chart 700 illustrating an exemplary method of communicating data bits over a 1.25 MHz frequency region dedicated for lowbandwidth MTC devices 104A-N in the LTE network, according to another embodiment. Atstep 702, data bits received from the MAC layer 206 are encoded using an appropriate encoding technique. At step 704, the encoded data bits are interleaved and modulated using a configured modulation scheme (e.g., QPSK modulation scheme). - At step 706, data bits intended for the
MTC devices 104A-N are mapped to resource elements in the MTC scheduling region of the subframe. Atstep 708, the data bits mapped to the resource elements are transmitted to theMTC devices 104A-N over a radio frequency corresponding to the MTC scheduling region. -
FIG. 8 is a schematic representation illustrating of anexemplary radio frame 800 containing aMBSFN subframe 802 with aMTC scheduling region 804, according to one embodiment. The radio frame of 20 MHz contains a plurality of subframes with aMBSFN subframe 802. TheMBSFN subframe 802 includes aMTC scheduling region 804 of 1.25 MHz. When MBSFN data is being transmitted on a time slot, theeNodeB 102 maps data bits to resource elements of theMBSFN subframe 802 on the entire 20 MHz bandwidth. When MTC data is being transmitted or received on a time slot, in one embodiment, theeNode B 102 maps data bits intended forMTC devices 104A-N to resource elements belonging 1.25 MHz frequency region in theMBSFN subframe 802. -
FIG. 9 is a process flow chart 900 illustrating an exemplary method of processing the received data bits by the lowbandwidth MTC device 104A, according to one embodiment. Atstep 902, data bits transmitted over the radio frequency corresponding to the 1.25 MHz frequency region is received by theMTC device 104A. Atstep 904, the received data bits that are mapped to the resource elements in the 1.25 MHz frequency region of the physical channel are re-mapped to the respective resource elements of the logical channel. - At step 906, the data bits mapped to the respective resource elements of the logical channel are demodulated using an appropriate demodulation scheme. At step 908, the demodulated data bits mapped to the respective resource elements of the logical channel are decoded using an appropriate decoding technique and sent to the MAC layer 206 for further processing.
- Apart from the embodiments described in
FIGS. 1 to 9 , theeNodeB 102 can transmit data to theMTC devices 104A-N by bundling theMTC devices 104A-N into a paging cycle. If theMTC devices 104A-N are bundled into a paging cycle, theeNodeB 102 indicates to theMTC devices 104A-N in dedicated signalling mechanism (e.g., dedicated non-access stratum (NAS) message). - The present embodiments have been described with reference to specific example embodiments, it will be evident that various modifications and changes may be made to these embodiments without departing from the broader spirit and scope of the various embodiments. Furthermore, the various devices, modules, and the like described herein may be enabled and operated using hardware circuitry, for example, complementary metal oxide semiconductor based logic circuitry, firmware, software and/or any combination of hardware, firmware, and/or software embodied in a machine readable medium. For example, the various electrical structure and methods may be embodied using transistors, logic gates, and electrical circuits, such as application specific integrated circuit.
Claims (20)
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a master information block (MIB) including first information for identifying a common control region in which a physical downlink control channel (PDCCH) is to be received; and
receiving, from the base station, a system information message including second information for identifying a common search space,
wherein a frequency region of the common control region is within a bandwidth of a cell and includes consecutive physical resource blocks (PRBs), and
wherein a time region of the common control region is within three orthogonal frequency division multiplexing (OFDM) symbols.
2. The method of claim 1 , wherein a quadrature phase shift keying (QPSK) modulation scheme is applied for the common control region.
3. The method of claim 1 , wherein the PDCCH is for scheduling the system information message.
4. The method of claim 1 , wherein the system information message further includes third information for identifying a random access channel (RACH) region.
5. The method of claim 4 , further comprising:
transmitting, to the base station, a signal on the RACH region; and
receiving, from the base station, a message for configuring one or more bandwidths in the bandwidth of the cell.
6. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a master information block (MIB) including first information for identifying a common control region in which a physical downlink control channel (PDCCH) is to be transmitted; and
transmitting, to the terminal, a system information message including second information for identifying a common search space,
wherein a frequency region of the common control region is within a bandwidth of a cell and includes consecutive physical resource blocks (PRBs), and
wherein a time region of the common control region is within three orthogonal frequency division multiplexing (OFDM) symbols.
7. The method of claim 6 , wherein a quadrature phase shift keying (QPSK) modulation scheme is applied for the common control region.
8. The method of claim 6 , wherein the PDCCH is for scheduling the system information message.
9. The method of claim 6 , wherein the system information message further includes third information for identifying a random access channel (RACH) region.
10. The method of claim 9 , further comprising:
receiving, from the terminal, a signal on the RACH region; and
transmitting, to the terminal, a message for configuring one or more bandwidths in the bandwidth of the cell.
11. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive, from a base station, a master information block (MIB) including first information for identifying a common control region in which a physical downlink control channel (PDCCH) is to be received, and
receive, from the base station, a system information message including second information for identifying a common search space,
wherein a frequency region of the common control region is within a bandwidth of a cell and includes consecutive physical resource blocks (PRBs), and
wherein a time region of the common control region is within three orthogonal frequency division multiplexing (OFDM) symbols.
12. The terminal of claim 11 , wherein a quadrature phase shift keying (QPSK) modulation scheme is applied for the common control region.
13. The terminal of claim 11 , wherein the PDCCH is for scheduling the system information message.
14. The terminal of claim 11 , wherein the system information message further includes third information for identifying a random access channel (RACH) region.
15. The terminal of claim 14 , wherein the controller is further configured to:
transmit, to the base station, a signal on the RACH region, and
receive, from the base station, a message for configuring one or more bandwidths in the bandwidth of the cell.
16. A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
transmit, to a terminal, a master information block (MIB) including first information for identifying a common control region in which a physical downlink control channel (PDCCH) is to be transmitted, and
transmit, to the terminal, a system information message including second information for identifying a common search space,
wherein a frequency region of the common control region is within a bandwidth of a cell and includes consecutive physical resource blocks (PRBs), and
wherein a time region of the common control region is within three orthogonal frequency division multiplexing (OFDM) symbols.
17. The base station of claim 16 , wherein a quadrature phase shift keying (QPSK) modulation scheme is applied for the common control region.
18. The base station of claim 16 , wherein the PDCCH is for scheduling the system information message.
19. The base station of claim 16 , wherein the system information message further includes third information for identifying a random access channel (RACH) region.
20. The base station of claim 19 , wherein the controller is further configured to:
receive, from the terminal, a signal on the RACH region, and
transmit, to the terminal, a message for configuring one or more bandwidths in the bandwidth of the cell.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/182,175 US20230217224A1 (en) | 2011-11-18 | 2023-03-10 | Low bandwidth machine type communication in a long term evolution network |
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN3967/CHE/2011 | 2011-11-18 | ||
IN3967CH2011 | 2011-11-18 | ||
PCT/KR2012/009802 WO2013073924A1 (en) | 2011-11-18 | 2012-11-19 | Low bandwidth machine type communication in a long term evolution network |
US201414359276A | 2014-05-19 | 2014-05-19 | |
US15/598,190 US10880713B2 (en) | 2011-11-18 | 2017-05-17 | Low bandwidth machine type communication in a long term evolution network |
US17/135,674 US11606678B2 (en) | 2011-11-18 | 2020-12-28 | Low bandwidth machine type communication in a long term evolution network |
US18/182,175 US20230217224A1 (en) | 2011-11-18 | 2023-03-10 | Low bandwidth machine type communication in a long term evolution network |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/135,674 Continuation US11606678B2 (en) | 2011-11-18 | 2020-12-28 | Low bandwidth machine type communication in a long term evolution network |
Publications (1)
Publication Number | Publication Date |
---|---|
US20230217224A1 true US20230217224A1 (en) | 2023-07-06 |
Family
ID=48429913
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/359,276 Active 2033-08-13 US9686633B2 (en) | 2011-11-18 | 2012-11-19 | Low bandwidth machine type communication in a long term evolution network |
US15/598,190 Active US10880713B2 (en) | 2011-11-18 | 2017-05-17 | Low bandwidth machine type communication in a long term evolution network |
US17/135,674 Active 2033-02-26 US11606678B2 (en) | 2011-11-18 | 2020-12-28 | Low bandwidth machine type communication in a long term evolution network |
US18/182,175 Pending US20230217224A1 (en) | 2011-11-18 | 2023-03-10 | Low bandwidth machine type communication in a long term evolution network |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/359,276 Active 2033-08-13 US9686633B2 (en) | 2011-11-18 | 2012-11-19 | Low bandwidth machine type communication in a long term evolution network |
US15/598,190 Active US10880713B2 (en) | 2011-11-18 | 2017-05-17 | Low bandwidth machine type communication in a long term evolution network |
US17/135,674 Active 2033-02-26 US11606678B2 (en) | 2011-11-18 | 2020-12-28 | Low bandwidth machine type communication in a long term evolution network |
Country Status (2)
Country | Link |
---|---|
US (4) | US9686633B2 (en) |
WO (1) | WO2013073924A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2869491A1 (en) * | 2013-10-31 | 2015-05-06 | Telefonica S.A. | Method, communication system and controller node for the support of machine-type communications (MTC) in a LTE wireless network |
GB2522482A (en) * | 2014-01-28 | 2015-07-29 | Nec Corp | Communication system |
CN106416359B (en) * | 2014-03-21 | 2019-05-31 | 阿尔卡特朗讯 | Method and apparatus for inexpensive machine type communication |
US9622145B2 (en) | 2014-12-05 | 2017-04-11 | At&T Intellectual Property I, L.P. | Wireless network architecture for providing media content |
WO2016122268A1 (en) * | 2015-01-30 | 2016-08-04 | 엘지전자 주식회사 | Method and apparatus for tranceiving common control message in wireless access system supporting narrow band internet of things |
WO2016144076A1 (en) | 2015-03-06 | 2016-09-15 | Lg Electronics Inc. | Method and apparatus for configuring frame structure and frequency hopping for mtc ue in wireless communication system |
CN106162906B (en) * | 2015-03-31 | 2019-01-15 | 中兴通讯股份有限公司 | Scheduling information sending, receiving method and device |
US10652768B2 (en) * | 2015-04-20 | 2020-05-12 | Qualcomm Incorporated | Control channel based broadcast messaging |
US9686793B2 (en) * | 2015-05-01 | 2017-06-20 | Verizon Patent And Licensing Inc. | Network sharing scheme for machine-to-machine (M2M) network |
US10728914B2 (en) * | 2015-05-15 | 2020-07-28 | Qualcomm Incorporated | Physical uplink control chanel (PUCCH) configuration for machine type communications (MTC) |
US11319107B2 (en) * | 2016-03-07 | 2022-05-03 | Qualcomm Incorporated | Synchronization for standalone LTE broadcast |
US10917875B2 (en) * | 2016-06-06 | 2021-02-09 | Qualcomm Incorporated | Multicast and/or broadcast for enhanced machine type communications and/or narrowband internet-of-things |
US20180077689A1 (en) * | 2016-09-15 | 2018-03-15 | Qualcomm Incorporated | Multiple bandwidth operation |
CN117500060A (en) * | 2016-12-30 | 2024-02-02 | 华为技术有限公司 | Resource indication method of control channel, user equipment and network equipment |
US10797838B2 (en) * | 2017-09-29 | 2020-10-06 | Electronics And Telecommunications Research Institute | Apparatus and method for managing radio resources in mobile communication system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040017383A (en) * | 2002-08-21 | 2004-02-27 | 삼성전자주식회사 | Apparatus and method for modulating address data, apparatus and method demodulating address data therefor, and recording medium for recording modulated address data |
WO2008054306A2 (en) * | 2006-11-01 | 2008-05-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for reducing power consumption in user equipments in multi-carrier radio systems. |
JP4601637B2 (en) * | 2007-03-20 | 2010-12-22 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile station, transmission method, and wireless communication system |
US7920887B2 (en) * | 2007-07-20 | 2011-04-05 | Korean Advanced Institute Of Science And Technology | System and method for setting up P2P communication group in cellular system, and P2P communication system and method using P2P communication group |
US8885507B2 (en) * | 2009-12-11 | 2014-11-11 | Nokia Corporation | Method, apparatus and computer program product for allocating resources in wireless communication network |
US9445215B2 (en) * | 2010-04-21 | 2016-09-13 | Telefonaktiebolaget Lm Ericsson (Publ) | MTC device bandwidth reduction |
WO2011162565A2 (en) * | 2010-06-24 | 2011-12-29 | 엘지전자 주식회사 | Method and device for transmitting uplink data in wireless connection system |
WO2012005494A2 (en) * | 2010-07-06 | 2012-01-12 | 엘지전자 주식회사 | Method and device for allocating wireless resources for a machine type communication device in a wireless communication system |
US8848638B2 (en) * | 2011-06-27 | 2014-09-30 | Telefonaktiebolaget L M Ericsson (Publ) | Cellular communication system support for limited bandwidth communication devices |
-
2012
- 2012-11-19 WO PCT/KR2012/009802 patent/WO2013073924A1/en active Application Filing
- 2012-11-19 US US14/359,276 patent/US9686633B2/en active Active
-
2017
- 2017-05-17 US US15/598,190 patent/US10880713B2/en active Active
-
2020
- 2020-12-28 US US17/135,674 patent/US11606678B2/en active Active
-
2023
- 2023-03-10 US US18/182,175 patent/US20230217224A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US20210136546A1 (en) | 2021-05-06 |
US20140328303A1 (en) | 2014-11-06 |
US10880713B2 (en) | 2020-12-29 |
WO2013073924A1 (en) | 2013-05-23 |
US11606678B2 (en) | 2023-03-14 |
US9686633B2 (en) | 2017-06-20 |
US20170325048A1 (en) | 2017-11-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20230217224A1 (en) | Low bandwidth machine type communication in a long term evolution network | |
US11277883B2 (en) | Scheduling enhancements and hybrid automatic repeat request (HARQ) timing procedure for new radio (NR) unlicensed | |
CN111434064B (en) | Uplink control information transmission and hybrid automatic repeat request processing identification | |
US20210119738A1 (en) | Method and apparatus for partial retransmission in wireless cellular communication system | |
US10298362B2 (en) | Method and apparatus for partial retransmission in wireless cellular communication system | |
US11071136B2 (en) | System and method for multiplexing traffic | |
CN108476116B (en) | Narrowband physical control channel design | |
US9503239B2 (en) | Radio network node, user equipment and methods therein | |
CA2954996C (en) | User equipment and methods for allocation and signaling of time resources for device to device (d2d) communication | |
US11588599B2 (en) | Enhancements on random access for NR-unlicensed | |
CN104685819B (en) | Transmit RF terminal capabilities | |
EP3531779A1 (en) | Method and apparatus for transmitting control and data information in wireless cellular communication system | |
KR102238484B1 (en) | Resource allocation notification method, and device | |
CN111886822A (en) | Method and apparatus for utilizing full length transmission opportunities | |
WO2013107364A1 (en) | Method and apparatus for sending downlink control information, method and apparatus for detecting downlink control channel | |
CN111066279B (en) | UE capability constraint indication for high order modulation | |
CN108551388B (en) | Radio network node, user equipment and method for extended control channel use | |
EP4040877A1 (en) | Terminal and communication method | |
EP3641443A1 (en) | Method and apparatus for sending and receiving data | |
WO2022031515A1 (en) | Physical downlink control channel transmission in wireless communication | |
EP4044647A1 (en) | Base station, terminal, transmission method, and reception method | |
US8705382B2 (en) | Method of communication between devices operating within a wireless communication system | |
US20240048299A1 (en) | Frequency hopping and available slot determination for full-duplex operation | |
US20220303984A1 (en) | Network based operations for super-slot based data transmission | |
WO2021088785A1 (en) | Random access message differentiation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JAMADAGNI, SATISH NANJUNDA SWAMY;GANAPATHI, SARVESHA ANEGUNDI;HIRISAVE, PRADEEP KRISHNAMURTHY;AND OTHERS;SIGNING DATES FROM 20140522 TO 20140523;REEL/FRAME:062951/0272 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |