Source: http://patents.com/us-9735998.html
Timestamp: 2018-07-21 12:02:52
Document Index: 619333841

Matched Legal Cases: ['Application No. 2015', 'Application No. 2014', 'Application No. 16166204', 'Application No. 2014117724', 'Application No. 2014', 'Application No. 2014', 'Application No. 2014', 'Application No. 2014', 'Application No. 12845287', 'Application No. 12845287', 'Application No. 2016', 'Application No. 61']

US Patent # 9,735,998. Transmission point indication in coordinated multi-point system - Patents.com
United States Patent 9,735,998
Davydov , et al. August 15, 2017
Transmission point indication in coordinated multi-point system
Davydov; Alexei Vladimirovich (Nizhny Novgorod, RU), Morozov; Gregory Vladimirovich (Nizhny Novgorod, RU), Maltsev; Alexander Alexandrovich (Nizhny Novgorod, RU), Bolotin; Ilya Alexandrovich (Nizhny Novgorod, RU), Sergeyev; Vadim Sergeyevich (Nizhny Novgorod, RU)
Family ID: 1000002773173
15/061,839
US 20160192415 A1 Jun 30, 2016
13997588 9320015
PCT/RU2012/000235 Mar 29, 2012
61556109 Nov 4, 2011
Current CPC Class: H04L 27/2675 (20130101); H04B 7/024 (20130101); H04B 7/0456 (20130101); H04B 7/0626 (20130101); H04J 3/12 (20130101); H04J 11/00 (20130101); H04L 1/0026 (20130101); H04L 1/0077 (20130101); H04L 1/1812 (20130101); H04L 5/0035 (20130101); H04L 5/0053 (20130101); H04L 5/0055 (20130101); H04L 5/0078 (20130101); H04L 5/14 (20130101); H04L 27/2646 (20130101); H04L 27/2662 (20130101); H04W 4/005 (20130101); H04W 4/06 (20130101); H04W 24/02 (20130101); H04W 52/146 (20130101); H04W 52/242 (20130101); H04W 56/0015 (20130101); H04W 68/02 (20130101); H04W 72/02 (20130101); H04W 72/042 (20130101); H04W 72/0413 (20130101); H04W 72/085 (20130101); H04W 76/002 (20130101); H04W 76/021 (20130101); H04W 52/244 (20130101); H04W 52/34 (20130101); H04W 72/12 (20130101); H04W 84/14 (20130101); H04W 88/02 (20130101); H04W 88/08 (20130101); Y02B 60/50 (20130101)
Current International Class: H04W 72/04 (20090101); H04L 5/00 (20060101); H04L 5/14 (20060101); H04W 52/14 (20090101); H04W 68/02 (20090101); H04L 1/00 (20060101); H04W 76/00 (20090101); H04J 11/00 (20060101); H04L 1/18 (20060101); H04B 7/06 (20060101); H04W 56/00 (20090101); H04J 3/12 (20060101); H04W 52/24 (20090101); H04W 72/08 (20090101); H04W 4/00 (20090101); H04W 76/02 (20090101); H04W 4/06 (20090101); H04B 7/0456 (20170101); H04B 7/024 (20170101); H04L 27/26 (20060101); H04W 72/02 (20090101); H04W 24/02 (20090101); H04W 72/12 (20090101); H04W 52/34 (20090101); H04W 84/14 (20090101); H04W 88/02 (20090101); H04W 88/08 (20090101)
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The present application is a continuation of U.S. patent application Ser. No. 13/997,588 with 371(c) filing date of Sep. 12, 2013, entitled "TRANSMISSION POINT INDICATION IN COORDINATED MULTI-POINT SYSTEM," which is national phase entry under 35 U.S.C. .sctn.371 of International Application No. PCT/RU2012/000235, filed Mar. 29, 2012, entitled "TRANSMISSION POINT INDICATION IN COORDINATED MULTI-POINT SYSTEM," which claims priority to U.S. Provisional Patent Application No. 61/556,109, filed Nov. 4, 2011, entitled "ADVANCED WIRELESS COMMUNICATION SYSTEMS AND TECHNIQUES." The entire content and disclosures of which are hereby incorporated by reference in their entireties.
1. One or more non-transitory computer-readable media having instructions, stored thereon, that when executed cause a user equipment (UE) to: receive, via radio resource control (RRC) signaling, a plurality of parameter sets, wherein individual parameter sets of the plurality of parameter sets include a number of common reference signal (CRS) antenna ports, a CRS frequency shift and an index of a transmission point; detect a physical downlink control channel (PDCCH) that includes a 2-bit value corresponding to the index of the transmission point scheduled for transmission and indicating one of the individual parameter sets; identify the individual parameter set indicated by the 2-bit value; and decode a physical downlink shared channel (PDSCH) based on the identified individual parameter set.
2. The one or more computer-readable media of claim 1, wherein the instructions, when executed, further cause the UE to determine a PDSCH resource element (RE) mapping pattern based on the identified individual parameter set, and wherein the PDSCH is decoded based on the PDSCH RE mapping pattern.
3. The one or more computer-readable media of claim 1, wherein the individual parameter sets further include information related to a quantity or location of REs that are dedicated to multicast/broadcast single frequency network (MBSFN) information.
4. The one or more computer-readable media of claim 1, wherein the individual parameter sets further include one or more channel state information reference signal (CSI-RS) parameters.
5. The one or more computer-readable media of claim 1, wherein the parameter sets are associated with different transmission points of a Long Term Evolution (LTE) network.
6. The one or more computer-readable media of claim 1, wherein the 2-bit value is included in downlink control information (DCI) of the PDCCH, and wherein the PDCCH is detected after the receipt of the plurality of parameter sets via the RRC signaling.
7. The one or more computer-readable media of claim 1, wherein the plurality of parameter sets are received from a first transmission point and wherein the PDCCH is received from a second transmission point that is different from the first transmission point.
8. One or more non-transitory computer-readable media having instructions, stored thereon, that when executed cause an evolved Node B (eNB) to: transmit, to a user equipment (UE) via radio resource control (RRC) signaling, a plurality of parameter sets, wherein individual parameter sets of the plurality of parameter sets include a number of common reference signal (CRS) antenna ports, a CRS frequency shift and an index of a transmission point; transmit, to the UE, a physical downlink control channel (PDCCH) that includes a 2-bit value corresponding to the index of the transmission point scheduled for transmission and indicating one of the individual parameter sets; and transmit, to the UE, a physical downlink shared channel (PDSCH) based on the indicated individual parameter set.
9. The one or more computer-readable media of claim 8, wherein, to transmit the PDSCH based on the indicated individual parameter set, the eNB is to provide the PDSCH with a PDSCH resource element (RE) mapping pattern according to the indicated individual parameter set.
10. The one or more computer-readable media of claim 8, wherein the individual parameter sets further include information related to a quantity or location of REs that are dedicated to multicast/broadcast single frequency network (MBSFN) information.
11. The one or more computer-readable media of claim 8, wherein the individual parameter sets further include one or more channel state information reference signal (CSI-RS) parameters.
12. The one or more computer-readable media of claim 8, wherein the parameter sets are associated with different transmission points of a Long Term Evolution (LTE) network.
13. The one or more computer-readable media of claim 8, wherein the 2-bit value is transmitted after the transmission of the plurality of parameter sets.
14. An apparatus to be employed by a user equipment (UE), the apparatus comprising: a memory to store a plurality of parameter sets, individual parameter sets of the plurality of parameter sets including a number of common reference signal (CRS) antenna ports, a CRS frequency shift and an index of a transmission point; mapping circuitry coupled with the memory, the mapping circuitry to: receive a downlink control information (DCI) message including a 2-bit value corresponding to the index of the transmission point scheduled for transmission and indicating a first parameter set of the plurality of parameter sets; determine a physical downlink shared channel (PDSCH) resource element (RE) mapping pattern based on the first parameter set indicated by the value; and decode a PDSCH based on the determined PDSCH RE mapping pattern.
15. The apparatus of claim 14, wherein the plurality of parameter sets include 4 parameter sets, and wherein the value is represented by 2 bits.
16. The apparatus of claim 14, wherein the individual parameter sets further include information related to a quantity or location of REs that are dedicated to multicast/broadcast single frequency network (MBSFN) information.
17. The apparatus of claim 14, wherein the individual parameter sets further include one or more channel state information reference signal (CSI-RS) parameters.
18. The apparatus of claim 14, wherein the parameter sets are associated with different transmission points of a Long Term Evolution (LTE) network.
19. The apparatus of claim 14, wherein the plurality of parameter sets are received from a first transmission point and wherein the DCI message is received from a second transmission point that is different from the first transmission point.
20. The apparatus of claim 14, wherein the apparatus is to receive the plurality of parameter sets via radio resource control (RRC) signaling.
FIG. 2 is a configuration table in accordance with various embodiments.
FIG. 3 is a flowchart illustrating a transmission point indication method that may be performed by a user equipment in accordance with various embodiments.
FIG. 4 is a flowchart illustrating a transmission point indication method that may be performed by a base station in accordance with various embodiments.
Illustrative embodiments of the present disclosure include, but are not limited to, methods, systems, and apparatuses for transmission point indication in a coordinated multi-point (CoMP) system of a wireless communication network.
FIG. 1 schematically illustrates a wireless communication network 100 in accordance with various embodiments. Wireless communication network 100 (hereinafter "network 100") may be an access network of a 3rd Generation Partnership Project (3GPP) long-term evolution (LTE) network such as evolved universal mobile telecommunication system (UMTS) terrestrial radio access network (E-UTRAN). The network 100 may include a base station, e.g., enhanced node base station (eNB) 104, configured to wirelessly communicate with user equipment (UE) 108.
At least initially, the eNB 104 may have an established wireless connection with the UE 108 and may operate as a serving node within a CoMP measurement set. One or more additional eNBs of the network 100, e.g., eNBs 112 and 116, may also be included within the CoMP measurement set. eNBs 112 and 116 may be configured to facilitate wireless communication with the UE 108 through coordination with the eNB 104. The one or more additional eNBs may be collectively referred to as "coordinating nodes." An eNB may transition between coordinating and serving node roles.
The eNBs may each have generally the same transmission power capabilities as one another or, alternatively, some of the eNBs may have relatively lower transmission power capabilities. For example, in one embodiment the eNB 104 may be a relatively high-power base station such as a macro eNB, while the eNBs 112 and 116 may be relatively low-power base stations, e.g., pico eNBs and/or femto eNBs.
In various embodiments, the communications module 120 may receive common reference signal (CRS) parameters associated with individual base stations of the CoMP measurement set (e.g., eNBs 104, 112, and/or 116). For example, the CRS parameters may include an index, a number of CRS antenna ports, and/or a CRS frequency shifts associated with each base station of the CoMP measurement set. These parameters, which may vary among the base stations of the CoMP measurement set, may be used by the communications module 120 to accurately and efficiently identify relevant CRS transmissions.
FIG. 2 is a CRS configuration table 200 with various CRS parameters in accordance with some embodiments. The CRS configuration table 200 (hereinafter "table 200") may be stored in memory 128 and accessible by the mapping module 124. The transmission point index may be a value subsequently used in the communication of which node is the scheduled transmission point. The CRS antenna ports may be the antenna ports, either virtual or physical, of the base station over which CRS transmissions are transmitted. In some embodiments, the number of CRS antenna ports may be 1, 2, or 4. The CRS frequency shift may be a cell-specific frequency shift (e.g., in terms of number of subcarriers) that may be used to avoid constant collocation of reference signals from different cells. In some embodiments, the CRS frequency shift may be 0, 1, 2, 3, 4, or 5.
In some embodiments, the CRS parameters may further include information related to a quantity and/or location of resource elements (e.g., sub-carriers and/or OFDM symbols) of the OFDM frame that are dedicated to control information and/or multicast/broadcast single frequency network (MBSFN) information for the individual base stations of the CoMP measurement set. The resource elements used for control information and/or the MBSFN subframes may not include the CRS.
In various embodiments, the communications module 120 may receive the transmission point index via physical layer signaling. For example, in one embodiment, the transmission point index may be included in downlink control information (DCI), e.g., via a downlink control channel. This may allow for dynamic communication of relevant CRS parameters contemporaneously with the dynamic switching of the various transmission points in a DPS protocol. The DCI may further include other parameters for scheduling communications between the UE 108 and one or more base stations.
In some embodiments, the transmission point index may be transmitted by the scheduled base station. For example, eNB 104 may send UE 108 a transmission point index identifying eNB 104 as the scheduled base station. In other embodiments, the transmission point index may be transmitted by a different base station from the scheduled base station. For example, eNB 104 may send UE 108 a transmission point index that identifies eNB 112 as the scheduled base station.
eNB 104 may include a communications module 136 and a CoMP management module 140 coupled with one another at least as shown. The communications module 136 may be further coupled with one or more of a plurality of antennas 152 of the eNB 104. The communications module 136 may communicate (e.g., transmit and/or receive) with one or more UEs (e.g., UE 108). In various embodiments, the eNB 104 may include at least as many antennas as a number of simultaneous transmission streams transmitted to the UE 108, although the scope of the present disclosure may not be limited in this respect. One or more of the antennas 152 may be alternately used as transmit or receive antennas. Alternatively, or additionally, one or more of the antennas 152 may be dedicated receive antennas or dedicated transmit antennas. The CoMP management module 140 may transmit (e.g., via the communications module 136), CRS parameters associated with the individual base stations of the CoMP measurement set as described above.
Though not shown explicitly, the eNBs 112 and 116 may include modules/components similar to those of the eNB 104.
In DPS systems, demodulation reference signal (DM-RS) antenna ports may be dynamically assigned to base stations for transmission. The base station may apply the same pre-coding scheme (e.g., spatial and/or multiple input multiple output (MIMO) pre-coding scheme) to the DM-RS as on the PDSCH. Accordingly, the UE may not need to know the identity of the transmission point in order to receive DM-RS to decode the PDSCH transmission. However, different base stations may have different quantities of CRS ports and/or may have a CRS frequency shift that is dependent on the identity of the base station. Accordingly, the CRS configuration (e.g., arrangement of CRSs within the PDSCH transmission) may change from one base station to another.
FIG. 3 illustrates a transmission point indication method 300 in accordance with various embodiments. The transmission point indication method 300 may be performed by a UE (e.g., the UE 108). In some embodiments, the UE may include and/or have access to one or more computer-readable media having instructions stored thereon, that, when executed, cause the UE to perform the method 300.
At block 304, the UE may receive CRS parameters via RRC signaling. The CRS parameters may be associated with individual base stations of a CoMP measurement set that includes a plurality of base stations. In some embodiments, the CRS parameters may include a quantity of CRS antenna ports and/or a CRS frequency shift of the individual base stations of the CoMP measurement set. The UE may receive the CRS parameters as part of a CoMP configuration protocol. The CoMP configuration protocol may also include configuring CSI-RS parameters and the uplink control channel for CSI-RS feedback. Accordingly, the UE may also receive one or more CSI-RS parameters and/or uplink control channel parameters via RRC signaling, in addition to the CRS parameters. The UE may store the received CRS parameters in memory.
At block 308, the UE may receive a transmission point index via DCI. The transmission point index may correspond to a scheduled base station of the CoMP measurement set that is scheduled for communications with the UE (e.g., scheduled as the transmission point for the UE).
FIG. 4 illustrates a transmission point indication method 400 that may be performed by a base station (e.g., eNB 104) in accordance with various embodiments. The base station may be the serving node of a CoMP measurement set that includes a plurality of base stations.
The UE 108 described herein may be implemented into a system using any suitable hardware and/or software to configure as desired. FIG. 5 illustrates, for one embodiment, an example system 500 comprising one or more processor(s) 504, system control logic 508 coupled with at least one of the processor(s) 504, system memory 512 coupled with system control logic 508, non-volatile memory (NVM)/storage 516 coupled with system control logic 508, a network interface 520 coupled with system control logic 508, and input/output (I/O) devices 532 coupled with system control logic 508.
In some embodiments, an apparatus, e.g., a UE, is described that includes a communications module configured to receive CRS parameters associated with individual base stations of a CoMP measurement set including a plurality of base stations, and to receive a transmission point index corresponding to a first base station of the CoMP measurement set. The UE may further include a mapping module coupled with the communications module and configured to produce a PDSCH mapping pattern based on the CRS parameters associated with the first base station.
In some embodiments, the base station may be a serving node of the CoMP measurement set configured to manage communications between the UE and the plurality of base stations of the CoMP measurement set.
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