WO2012164536A1 - Apparatus and method for communication - Google Patents
Apparatus and method for communication Download PDFInfo
- Publication number
- WO2012164536A1 WO2012164536A1 PCT/IB2012/052771 IB2012052771W WO2012164536A1 WO 2012164536 A1 WO2012164536 A1 WO 2012164536A1 IB 2012052771 W IB2012052771 W IB 2012052771W WO 2012164536 A1 WO2012164536 A1 WO 2012164536A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frequency
- transmitter
- control
- channels
- controlling
- Prior art date
Links
Classifications
-
- 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
- H04W16/14—Spectrum sharing arrangements between different networks
-
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/0012—Hopping in multicarrier systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Apparatus and method for communication are provided. The solution comprises controlling (202) a transmitter to map com- mon and dedicated control channels on two frequency blocks and controlling (204) the transmitter to transmit the frequency blocks utilising pair-wise frequency hopping on a shared spec- trum.
Description
Apparatus and method for communication
Field of the Invention
The invention relates generally to wireless communications networks. More particular, but not exclusively, some embodiments of the invention relate to the control of a transmitter in a communications network while other embodiments of the invention relate to the control of a receiver in a communications network.
Background of the Invention
With the ever increasing demand for increasing data rates and higher quality services in the world of mobile communications comes ever increasing demand for better performance of cellular network infrastructures. The increased spectrum requirements due the increased data traffic drives operators to seek offloading solutions for their traffic, via local nodes providing local access to the Internet, to prevent congesting their own core network. A wide variety of diverse sizes of cells and connected devices are proposed in addition to traditional macro and microcells. However, the available frequency resources are limited and the need for efficient use of the resources is essential.
Traditional solutions to improve spectrum efficiency may not support the predicted data traffic in the future. Thus, operators, network and device manufacturers and other players in the field are considering the utilization of license-exempt (LE) or unlicensed frequency bands along with costly licensed spectrum. The LE spectrum can also be called 'shared spectrum'. Shared spectrum is only lightly regulated; users do not need licenses to exploit it. From the cellular traffic point of view, an interesting shared spectrum band opportunity is Industrial, Scientific and Medical (ISM) bands. The ISM bands are widely used for WLAN and Bluetooth® communications. The ISM bands allow both standardized systems and proprietary solutions to be deployed onto spectrum as far as regulations are followed. The regulations define maximum transmission powers and certain rules for the hopping based systems for the operation on the band.
Currently it is challenging for many cellular systems, such as the third and fourth generation systems long term evolution (LTE, known also as E-UTRA) and
long term evolution advanced (LTE-A), to utilise ISM bands, for example, due to required continuous and synchronous resource allocation for control channels both in downlink and uplink transmission directions.
Summary of the Invention
According to an aspect of the present invention, there is provided an apparatus for controlling a transmitter in a communication system, the apparatus comprising processing means arranged to: control a transmitter to map common and dedicated control channels on two frequency blocks; and control the transmitter to transmit the frequency blocks utilising pair-wise frequency hopping on a shared spectrum.
According to another aspect of the present invention, there is provided a method in a communication system, comprising: controlling a transmitter to map common and dedicated control channels on two frequency blocks; and controlling the transmitter to transmit the frequency blocks utilising pair-wise frequency hopping on a shared spectrum.
According to an aspect of the present invention, there is provided an apparatus for controlling a receiver in a communication system, the apparatus compris- ingprocessing means arranged to: control a receiver to receive common and dedicated control channels mapped to two frequency blocks utilising pair-wise frequency hopping on a shared spectrum.
According to another aspect of the present invention, there is provided a method in a communication system, comprising: controlling a receiver to receive common and dedicated control channels mapped to two frequency blocks utilising pair-wise frequency hopping on a shared spectrum.
According to another aspect of the present invention, there is provided a computer program comprising program code means adapted to perform the steps of either of the preceding methods when the program is run on a computer.
According to yet another aspect of the present invention there is provided a transmitter arrangement comprising an apparatus for controlling a transmitter as described above.
According to another aspect of the present invention there is provided a receiver arrangement comprising an apparatus for controlling a receiver as described above.
Brief Description of the Drawings
Embodiments of the present invention are described below, by way of example only, with reference to the accompanying drawings, in which
Figure 1 is a block diagram that illustrates an example of a communication environment;
Figure 2A and 2B are flowcharts illustrating processes according to embodiments of the invention;
Figure 3 is a flow diagram that illustrates another process according to an embodiment of the invention;
Figure 4A is a diagram that illustrates an example of the shared spectrum;
Figure 4B is a diagram that illustrates an example of the use of pair-wise frequency hopping; and
Figures 5A and 5B are high level block diagrams that illustrate examples of apparatuses applying embodiments of the invention.
Detailed Description of the Invention
Embodiments of the invention are applicable to any base station, user equipment (UE), server, corresponding component, and/or to any communications system or any combination of different communications systems that support required functionality, as will be described hereinafter.
The protocols used, the specifications of communication systems, servers and user terminals, especially in wireless communications, develop rapidly. Such development may require alterations or enhancements to an embodiment. Therefore, all words and expressions should be interpreted broadly and they are intended to illustrate, not to restrict, embodiments.
Many different radio protocols for use in communications systems exist. Some examples of different communication systems are the universal mobile telecommunications system (UMTS) radio access network (UTRAN or E-UTRAN), long
term evolution (LTE, known also as E-UTRA), long term evolution advanced (LTE- A), Wireless Local Area Network (WLAN) based on IEEE 802.11 star dard, worldwide interoperability for microwave access (WiMAX), Bluetooth®, personal communications services (PCS) and systems using ultra-wideband (UWB) technology. IEEE refers to the Institute of Electrical and Electronics Engineers. At least some embodiments of the present invention are relevant to one or more of these protocols.
Figure 1 illustrates a simplified view of a communications environment showing some of the main elements and functional entities (all being logical units whose implementation may differ from what is shown). The connections shown in Figure 1 are logical connections; the actual physical connections may be different. It will be apparent to a person skilled in the art that the systems also comprise other functions and structures. It will also be appreciated that the particular functions, structures, elements and the protocols used in or for communications are incidental to the actual invention. Therefore, they need not to be discussed in more detail herein.
In the example of Figure 1, a radio system based on LTE/SAE (Long Term Evolution/System Architecture Evolution) network elements is shown. However, as already alluded to the embodiments described in these examples are not limited to the LTE/SAE radio systems but can also be implemented in other radio systems.
The simplified example of a network of Figure 1 comprises a SAE Gateway (SAE GW) 100 and a Mobility Management Entity (MME) 102. The SAE GW 100 provides a connection to Internet 104. Figure 1 shows an Enhanced node B (eNodeB) 106 serving a macro cell 108. In addition, a local area base stations or Home NodeB (HNB) 110 with a corresponding coverage area 112 is shown. In this example, the HNB 110 and the eNodeB 106 are connected to the SAE GW 100 and to the MME 102.
In the example of Figure 1 , a first item of user equipment (UE) 114 is camped on the HNB 110. A second item of UE 116 is camped on the eNodeB 106. Furthermore, a wireless local area network (WLAN) base station 118 is transmitting with a coverage area 120.
The eNodeB of a communication system may host the functions for Radio Resource Management: Radio Bearer Control, Radio Admission Control, Connection Mobility Control, Dynamic Resource Allocation (scheduling). The MME 102 is re-
sponsible for overall UE control in mobility, session/call and state management with assistance of the eNodeBs through which the UEs connect to the network. The SAE GW 100 is an entity configured to act as a gateway between the network and other parts of communications network such as the Internet for example. The SAE GW 100 may be a combination of two gateways, a serving gateway (S-GW) and a packet data network gateway (P-GW).
As used herein, user equipment, or UE, refers to a portable computing device. Such computing devices include wireless mobile communication devices operating with or without a subscriber identification module (SIM), including, but not limited to, the following types of devices: mobile phone, smartphone, personal digital assistant (PDA), handset, laptop computer, and the like.
In an embodiment, at least some of the above connections between NodeB's and UEs utilise LE spectrum, which may, for example, be the same as the spectrum used by the WLAN base station 118.
The regulations applying to the use of LE spectrum require different systems to use the available resources in a fair manner without causing excessive interference to other systems using the same resources.
In an embodiment, Listen-Before-Talk (LBT), or channel contention between the devices communicating on the shared spectrum, is used to reduce interference. LBT or channel contention may require a device to listen, monitor and/or measure the usage of a channel for a given time before making a decision on whether to transmit on the channel or not. In an embodiment, the device monitors energy level on a channel and, if the level is above a given threshold, it may determine that the channel is in use by another device. If the channel or spectrum is used by another device, the transmitter is configured to abstain from transmitting or select a different channel.
As most cellular systems require that control channel transmissions are continuous and synchronous, the restricted use of resources on shared spectrum presents a challenge as the resource allocation for control channels both in downlink and uplink transmission directions is problematic as it cannot be guaranteed in advance. Likewise, if LBT type of channel access is utilized, the resource allocation for synchronization signals, critical control channel signalling like HARQ (Hybrid automatic
repeat request) feedback is challenging as there is no certainty that resources for the required HARQ feedback for the earlier data transmission can be obtained.
In LTE based systems, dedicated and common control channels include Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Downlink Control Channel (PDCCH), Physical HARQ Indicator Channel (PHICH), Physical Uplink Shared Channel (PUSCH) and synchronization signals.
As already explained, embodiments of the invention are not limited to LTE based systems. The above channels and numerical values below are provided by way of a non-limiting example only.
In an embodiment, it is proposed to transmit dedicated and common control channels using frequency hopping. In LTE based systems, synchronization signals are currently transmitted among the symbols of Physical Downlink Shared Channel (PDSCH). In the embodiment, the synchronization signals are transmitted in the control channel region utilizing frequency hopping. The regulations on ISM bands require that the maximum continuous frequency bandwidth for the hopping system is less than 1 MHz and that the hopping system should hop pseudo-randomly between at least 15 non-overlapping frequency channels. As synchronization signals and PBCH on downlink require a 1.08 MHz bandwidth (6 Physical Resource Blocks (PRB)), the present LTE method of mapping control channels onto radio resources cannot be applied.
Figure 2A is a flowchart illustrating an embodiment of the invention. The embodiment starts at step 200.
In step 202, a transmitter is controlled to map common and dedicated control channels on two frequency blocks.
In step 204, the transmitter is controlled to transmit the frequency blocks utilising pair-wise frequency hopping on a shared spectrum.
The process ends in step 206.
In the embodiment, it is proposed that control channel transmission on downlink and uplink utilize a pair-wise hopping of frequency pieces. When applying the embodiment to LTE based system, the bandwidth of the frequency blocks the control channels are mapped to could be three PRBs each. Three PRBs equal to 504 KHz and thus combining two pieces a virtual 6 PRB frequency chunk is obtained from
which a receiver can construct a signal having a 1.08 MHz bandwidth. Thus it is possible to reuse LTE common channels in their current format mapped in a discontinuous way onto subcarriers in the frequency domain.
Figure 2B is a flowchart illustrating an embodiment of the invention applied in a receiver. The embodiment starts at step 210.
In step 212, a receiver is controlled to receive common and dedicated control channels mapped to two frequency blocks utilising pair-wise frequency hopping on a shared spectrum.
The process ends in step 214.
Figure 3 is a flowchart illustrating an embodiment of the invention. The embodiment starts at step 300.
In step 302, a transceiver is controlled to detect and identify WLAN channels on given shared spectrum. The shared spectrum may be the ISM band on 2.4 or 5 GHz, for example. In the embodiment, downlink and uplink control channels are transmitted using frequency hopping (continuously in time domain) between the identified WLAN channels. Shared data channels for both downlink and uplink may be transmitted using LBT on identified WLAN channels. In LTE based systems, the shared data channels are PDSCH and PUSCH.
In step 304, a transceiver is controlled to map common and dedicated control channels on two frequency blocks on a shared spectrum utilizing the frequency bands between the identified WLAN channels.
In step 306, the transceiver is controlled to transmit the frequency blocks utilising pair-wise frequency hopping utilizing the frequency bands between the identified WLAN channels. Thus, the frequencies used in the transmission frequency blocks hop using the same hopping pattern. The hopping pattern may be a predefined pattern or one of a set of predefined hopping patterns. In general, the hopping patterns are defined by a base station or eNodeB, or by another network element of a communication system. When a UE is switched on it searches for control channel transmissions of an eNodeB. For example, when the UE finds a control channel transmitted by an eNodeB it may obtain information of the hopping pattern from the eNodeB.
For example in the 2.4 GHz ISM band, there are three non-overlapping WLAN channels each using a bandwidth of 20/22 MHz. Taking into account a normal
effective bandwidth of 83.5 MHz in 2.4 GHz ISM (in some countries, the 2.4 GHz ISM can utilize 100 MHz, and thus there are also 14 WLAN channels), it is possible to support 15 non-overlapping frequency resources for the hopping control channel design. In addition, using the pair-wise hopping for the control channels and having hopping frequency of 1 ms (1 sub frame with two slots) allows a slot based hopping for PUCCH similar to current LTE based systems.
As mentioned above, in contrast to current LTE synchronization, signals are not transmitted among the symbols of PDSCH, but in the control channel region utilizing the pair-wise hopping. In the embodiment, the hopping pattern and deployment of synchronization signals is designed so that the receiver (such as a UE) requiring the synchronization signals would not need to use the whole bandwidth of the ISM band to detect the synchronization signals in an initial search phase of the LTE eNB on a ISM band. One option is to maintain synchronization signals in one region of the ISM band. The region may be the largest frequency region not used by the WLAN of the ISM band. For example, if the synchronization signals are transmitted every 5 ms, the hopping patterns may be so that control channel transmission takes place at least every 5 ms on certain resource region (the largest frequency region not used by the WLAN). For example, when channels 1 , 6 and 11 are used by a WLAN system, the largest frequency region would be from 2470 to 2480 MHz.
In step 308, the transceiver is controlled to transmit shared data channels using LBT on identified WLAN channels. As described above, in LBT a transceiver listens or measures the usage of a channel before making the decision whether to transmit on the channel or not. If the channel or spectrum is used by another device, the transmitter is configured to abstain from transmitting or select a different channel. In this way, the transmission does not interfere with WLAN transmissions on the same channel.
The process ends in 310.
Figure 4A illustrates an example of the shared spectrum. The figure shows WLAN channels on the 2.4GHZ ISM frequency band. Three WLAN channels 400, 402, 404 are illustrated. The channels may be identified as channels 1, 6 and 11. The numbering varies in different regions, however. Between the WLAN channels there
are guard bands 406, 408, 410 and 412, which have bandwidths lMHz, 3 MHz, 3MHz and 10 MHz, respectively.
In an embodiment, the common and dedicated control channels are mapped to two frequency blocks and transmit the frequency blocks utilising pair-wise frequency hopping on the frequency bands 406, 408, 410 and 412, which are between the WLAN channels. The frequency bands 406, 408, 410 and 412 form a 17MHZ virtual frequency spectrum 414 which is utilised when transmitting the control channels both in the downlink and the uplink direction. In LTE- based systems, PUCCH is transmitted in the uplink direction and PDCCH, PCFICH, PHICH, PBCH and synchronization signals are transmitted in the downlink direction. The transmissions utilize Time Division Duplex (TDD), where different transmission directions use the same frequency resources but are separated in time.
Figure 4B illustrates an example of the use of the pair-wise frequency hopping of the control channels' transmission on the shared spectrum. The control channels are mapped to two frequency blocks where the bandwidth of each frequency block is three PRBs corresponding to 504 KHz. Figure 4B shows a pair 420 of frequency blocks. The blocks are frequency hopping in time to positions 422 and 424 in the virtual frequency band 414. Only two first hopping positions are illustrated in Figure 4B. In an embodiment, the synchronization signals are placed in a frequency block that is located in the largest region 412.
Figure 5 A illustrates a simplified example of an apparatus applying embodiments of the invention. In some embodiments, the apparatus may be an eNodeB or user equipment of a communications system, for example, as illustrated in Figure 1.
It should be understood that the apparatus is depicted herein as an example according to some embodiments. It will be apparent to a person skilled in the art that the apparatus may also comprise other functions and/or structures and not all described functions and structures are required. Although the apparatus has been depicted as one entity, different modules and memory may be implemented in one or more physical or logical entities.
The apparatus of the example includes a control circuitry 500 configured to control at least part of the operation of the apparatus.
The apparatus comprises a memory 502 for storing data. Furthermore the memory stores software 504 executable by the control circuitry 500. The memory in this instance is integrated in the control circuitry.
The apparatus comprises a transceiver 506. The transceiver is operationally connected to the control circuitry 500, and to an antenna arrangement (not shown) in a known way.
The software 504 comprises a computer program comprising program code means adapted to cause the control circuitry 500 of the apparatus to control the transceiver 506 to map common and dedicated control channels on two frequency blocks and control the transceiver to transmit the frequency blocks utilising pair-wise frequency hopping on a shared spectrum.
The apparatus further comprises interface circuitry 508 configured to connect the apparatus to other devices and network elements of a communications system, for example to core. This applies especially if the apparatus is an eNodeB or a base station or a respective network element. The interface provides a wired or wireless connection to the communications network. The apparatus may be in connection with core network elements, eNodeBs, HNBs and with other respective apparatuses of the communication systems.
The apparatus further comprises a user interface 510 operationally connected to the control circuitry 500. The user interface comprises a display, a keyboard or keypad, a microphone and a speaker, for example. This applies especially if the apparatus is UE or a respective network element.
Figure 5B illustrates a a simplified example of an apparatus applying embodiments of the invention. The apparatus may be an eNodeB or user equipment of a communications system.
It should be understood that the apparatus is depicted herein as an example according to some embodiments. It will be apparent to a person skilled in the art that the apparatus may also comprise other functions and/or structures and not all described functions and structures are required. Although the apparatus has been depicted as one entity, different modules and memory may be implemented in one or more physical or logical entities.
The apparatus of the example includes a control circuitry 520 configured to control at least part of the operation of the apparatus.
The apparatus comprises a memory 522 for storing data. Furthermore the memory stores software 524 executable by the control circuitry 520. The memory in this instance is integrated in the control circuitry.
The apparatus comprises a transceiver 526. The transceiver is operationally connected to the control circuitry 520, and to an antenna arrangement (not shown) in a known way.
The software 524 comprises a computer program comprising program code means adapted to cause the control circuitry 520 of the apparatus to control the transceiver 526 to receive common and dedicated control channels mapped to two frequency blocks utilising pair-wise frequency hopping on a shared spectrum. The transceiver is configured to utilise more than one non-overlapping frequency band when receiving the two frequency blocks utilising pair-wise frequency hopping.
In an LTE based system, the bandwidth of the frequency blocks the control channels are mapped to could be three PRBs each. Three PRBs equal to 504 KHz. The transceiver 526 is configured to receive frequency blocks and the software 524 controls the apparatus to combine the two received frequency blocks and construct a signal having 1.08 MHz bandwidth. Thus it is possible to reuse LTE common channels in their current format mapped in a discontinuous way onto subcarriers in the frequency domain.
The apparatus further comprises interface circuitry 528 configured to connect the apparatus to other devices and network elements of communication system, for example to core. This applies especially if the apparatus is an eNodeB or a base station or respective network element. The interface provides either a wired or wireless connection to the communications network. The apparatus may be in connection with core network elements, eNodeBs, HNBs and with other respective apparatuses of communication systems.
The apparatus further comprises a user interface 530 operationally connected to the control circuitry 520. The user interface comprises a display, a keyboard or keypad, a microphone and a speaker, for example. This applies especially if the apparatus is user equipment or respective network element.
In any event, other embodiments of the invention may be implemented using more, fewer or a different arrangement of components to those described in relation to Figures 5 A and 5B.
The steps and related functions described in the above and attached figures are in no absolute chronological order, and some of the steps may be performed simultaneously or in an order differing from the given one. Other functions can also be executed between the steps or within the steps. Some of the steps can also be left out or replaced with a corresponding step.
The apparatuses or controllers that are able to perform the above-described steps may be implemented as an electronic digital computer, which may comprise a working memory (RAM), a central processing unit (CPU), and a system clock. The CPU may comprise a set of registers, an arithmetic logic unit, and a controller. The controller is controlled by a sequence of program instructions transferred to the CPU from the RAM. The controller may contain a number of microinstructions for basic operations. The implementation of microinstructions may vary depending on the CPU design. The program instructions may be coded by a programming language, which may be a high-level programming language, such as C, Java, etc., or a low-level programming language, such as a machine language, or an assembler. The electronic digital computer may also have an operating system, which may provide system services to a computer program written with the program instructions.
As used in this application, the term 'circuitry' refers to all of the following: (a) hardware-only circuit implementations, such as implementations in only analog and/or digital circuitry, and (b) combinations of circuits and software (and/or firmware), such as (as applicable): (i) a combination of processor(s) or (ii) portions of processor(s)/software including digital signal processor(s), software, and memory(ies) that work together to cause an apparatus to perform various functions, and (c) circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present.
This definition of 'circuitry' applies to all uses of this term in this application. As a further example, as used in this application, the term 'circuitry' would also cover an implementation of merely a processor (or multiple processors) or a portion of a processor and its (or their) accompanying software and/or firmware. The term 'cir-
cuitry' would also cover, for example and if applicable to the particular element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in a server, a cellular network device, or another network device.
An embodiment provides a computer program embodied on a distribution medium, comprising program instructions which, when loaded into an electronic apparatus, are configured to control the apparatus to execute the embodiments described above.
The computer program may be in source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, which may be any entity or device capable of carrying the program. Such carriers include a record medium, computer memory, read-only memory, and a software distribution package, for example. Depending on the processing power needed, the computer program may be executed in a single electronic digital computer or it may be distributed amongst a number of computers.
The apparatus may also be implemented as one or more integrated circuits, such as application- specific integrated circuits ASIC. Other hardware embodiments are also feasible, such as a circuit built of separate logic components. A hybrid of these different implementations is also feasible. When selecting the method of implementation, a person skilled in the art will consider the requirements set for the size and power consumption of the apparatus, the necessary processing capacity, production costs, and production volumes, for example.
It will be obvious to a person skilled in the art that, as technology advances, the inventive concept can be implemented in various ways. The invention and its embodiments are not limited to the examples described above but may vary within the scope of the claims.
Claims
1. An apparatus for controlling a transmitter in a communications system, the apparatus comprising processing means arranged to:
control a transmitter to map common and dedicated control channels onto two frequency blocks; and
control the transmitter to transmit the frequency blocks utilising pair-wise frequency hopping on a shared spectrum.
2. The apparatus of claim 1 , wherein the processing means is arranged to control the transmitter to transmit on shared data channels using Listen-Before-Talk.
3. The apparatus of claim 1 or 2, wherein the processing means is arranged to control the transmitter to utilise more than one non-overlapping frequency resource when transmitting the two frequency blocks utilising pair-wise frequency hopping.
4. The apparatus of any preceding claim, wherein the processing means is arranged to map synchronisation signals to the two frequency blocks.
5. The apparatus of claims 3 and 4, wherein the processing means is arranged to control the transmitter to transmit the synchronisation signals in the largest frequency resource.
6. The apparatus of any preceding claim, wherein the processing means is arranged to identify wireless local area network channels of a given frequency band and control the transmitter to utilise frequency bands located between the identified wireless local area network channels in the transmission of the two frequency blocks.
7. The apparatus of any preceding claim, wherein the processing means is arranged to control the transmitter to transmit shared data channels using Listen- Before-Talk on identified wireless local area network channels.
8. An apparatus for controlling a receiver in a communications system, the apparatus comprising processing means arranged to:
control a receiver to receive common and dedicated control channels mapped to two frequency blocks utilising pair-wise frequency hopping on a shared spectrum.
9. The apparatus of claim 8, wherein the processing means is arranged to control the receiver to utilise more than one non-overlapping frequency bands in when receiving the two frequency blocks utilising pair-wise frequency hopping.
10. A method in a communication system, comprising:
controlling a transmitter to map common and dedicated control channels on two frequency blocks; and
controlling the transmitter to transmit the frequency blocks utilising pair- wise frequency hopping on a shared spectrum.
11. The method of claim 10, further comprising: controlling the transmitter to transmit on shared data channels using Listen-Before-Talk.
12. The method of claim 10 or 11, further comprising: controlling the transmitter to utilise more than one non-overlapping frequency resources in when transmitting the two frequency blocks utilising pair-wise frequency hopping.
13. The method of any of claims 10 to 12, further comprising: mapping synchronisation signals to the two frequency blocks.
14. The method of claims 12 and 13, further comprising: controlling the transmitter to transmit the synchronisation signals in the largest frequency resource.
15. The method of any of claims 10 to 14, further comprising: identifying wireless local area network channels of a given frequency band and controlling the transmitter to utilise frequency bands located between the identified wireless local area network channels in the transmission of the two frequency blocks.
16. The method of any of claims 10 to 15, further comprising: controlling the transmitter to transmit shared data channels using Listen-Before-Talk on identified wireless local area network channels.
17. A method in a communication system, comprising:
controlling a receiver to receive common and dedicated control channels mapped to two frequency blocks utilising pair- wise frequency hopping on a shared spectrum.
18. The method of claim 17, further comprising: controlling the receiver to utilise more than one non-overlapping frequency band when receiving the two fre- quency blocks utilising pair- wise frequency hopping.
19. A computer program comprising program code means adapted to perform the steps of any of claims 10 to 18 when the program is run on a computer.
20. A transmitter arrangement comprising an apparatus according to any one of claims 1 to 7.
21. A receiver arrangement comprising an apparatus according to either one of claims 8 and 9.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1109310.1A GB2491401B (en) | 2011-06-03 | 2011-06-03 | Apparatus and method for communication |
US13/152,826 | 2011-06-03 | ||
GB1109310.1 | 2011-06-03 | ||
US13/152,826 US20120307870A1 (en) | 2011-06-03 | 2011-06-03 | Apparatus and method for communication |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012164536A1 true WO2012164536A1 (en) | 2012-12-06 |
Family
ID=46642584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2012/052771 WO2012164536A1 (en) | 2011-06-03 | 2012-06-01 | Apparatus and method for communication |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2012164536A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150043523A1 (en) * | 2013-08-12 | 2015-02-12 | Qualcomm Incorporated | Transmission and reception of common channel in an unlicensed or shared spectrum |
WO2015124084A1 (en) * | 2014-02-23 | 2015-08-27 | 上海朗帛通信技术有限公司 | Base station and method and device for scheduling on unlicensed spectrum in ue |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1976317A1 (en) * | 2006-01-18 | 2008-10-01 | NTT DoCoMo, Inc. | Base station, communication terminal, transmission method and reception method |
WO2010029177A2 (en) * | 2008-09-15 | 2010-03-18 | Nokia Siemens Networks Oy | Methods, apparatuses, system and related computer program product for signal transmission and reception |
WO2012040520A1 (en) * | 2010-09-23 | 2012-03-29 | Interdigital Patent Holdings, Inc. | Channel access systems and methods for cognitive relaying for cellular systems |
-
2012
- 2012-06-01 WO PCT/IB2012/052771 patent/WO2012164536A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1976317A1 (en) * | 2006-01-18 | 2008-10-01 | NTT DoCoMo, Inc. | Base station, communication terminal, transmission method and reception method |
WO2010029177A2 (en) * | 2008-09-15 | 2010-03-18 | Nokia Siemens Networks Oy | Methods, apparatuses, system and related computer program product for signal transmission and reception |
WO2012040520A1 (en) * | 2010-09-23 | 2012-03-29 | Interdigital Patent Holdings, Inc. | Channel access systems and methods for cognitive relaying for cellular systems |
Non-Patent Citations (1)
Title |
---|
PHILIPS: "Mitigation of Control Channel Interference", 3GPP DRAFT; R1-102984, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Montreal, Canada; 20100510, 4 May 2010 (2010-05-04), XP050420091 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150043523A1 (en) * | 2013-08-12 | 2015-02-12 | Qualcomm Incorporated | Transmission and reception of common channel in an unlicensed or shared spectrum |
WO2015023538A1 (en) * | 2013-08-12 | 2015-02-19 | Qualcomm Incorporated | Transmission and reception of common channel in an unlicensed or shared spectrum |
CN105453475A (en) * | 2013-08-12 | 2016-03-30 | 高通股份有限公司 | Transmission and reception of common channel in an unlicensed or shared spectrum |
US9967752B2 (en) | 2013-08-12 | 2018-05-08 | Qualcomm Incorporated | Transmission and reception of common channel in an unlicensed or shared spectrum |
CN105453475B (en) * | 2013-08-12 | 2019-03-08 | 高通股份有限公司 | Unlicensed frequency spectrum or the common signal channel in shared frequency spectrum send and receive |
WO2015124084A1 (en) * | 2014-02-23 | 2015-08-27 | 上海朗帛通信技术有限公司 | Base station and method and device for scheduling on unlicensed spectrum in ue |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8867521B2 (en) | Apparatus and method for communication | |
CN110249543B (en) | Method, device, equipment and readable medium for wireless communication | |
CN109417710B (en) | Method and apparatus for managing interference across operators | |
CN109982445B (en) | Coupling uplink and downlink CCAs in LTE-U | |
US20120307870A1 (en) | Apparatus and method for communication | |
US20130107116A1 (en) | Apparatus and Method for Communication | |
US9496919B2 (en) | Mobile communication networks | |
US10291342B2 (en) | TDD data transmission on multiple carriers with sub frames reserved for predetermined transmission directions | |
CN110073630A (en) | Channel reservation signal with new radio PDCCH waveform | |
US9232514B2 (en) | Apparatus and method for a communication system | |
US8660109B2 (en) | Apparatus and method for controlling communication | |
CN110999456B (en) | Transmission, reception and configuration of CSIRS with configurable bandwidth | |
JP6437094B2 (en) | Discovery signal transmission method, cell discovery method and apparatus | |
CN113678534A (en) | Resource configuration for bandwidth portion for wireless networks | |
EP3909185A1 (en) | Collision of sounding reference signal (srs) and physical uplink shared channel (pusch) in case of carrier aggregation | |
CN114830743A (en) | Coordinated sidelink power saving configuration | |
EP3100576A1 (en) | Apparatuses and methods for cell operation signalling | |
WO2012164536A1 (en) | Apparatus and method for communication | |
US11864208B2 (en) | Control resource set (CORESET) allocation for reduced bandwidth devices in 5G-NR | |
WO2017105408A1 (en) | Ue categorization and band selection strategy for fractional frequency reuse in full-duplex system | |
GB2493986A (en) | Apparatus and method for communication | |
GB2491401A (en) | Control channels are mapped onto two frequency blocks and transmitted utilising pair-wise frequency hopping on a shared spectrum | |
WO2013030732A1 (en) | Apparatus and method for communication | |
US11723044B2 (en) | Control resource set with larger allocation in the time domain for reduced bandwidth devices | |
US20230328759A1 (en) | Design of nr sidelink transmission gap |
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: 12745905 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: 12745905 Country of ref document: EP Kind code of ref document: A1 |