US20060189355A1 - System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping - Google Patents

System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping Download PDF

Info

Publication number
US20060189355A1
US20060189355A1 US11/409,130 US40913006A US2006189355A1 US 20060189355 A1 US20060189355 A1 US 20060189355A1 US 40913006 A US40913006 A US 40913006A US 2006189355 A1 US2006189355 A1 US 2006189355A1
Authority
US
United States
Prior art keywords
beam
plurality
wtru
system
base station
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.)
Abandoned
Application number
US11/409,130
Inventor
Angelo Cuffaro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
InterDigital Technology Corp
Original Assignee
InterDigital Technology Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US39259702P priority Critical
Priority to US42035502P priority
Priority to US10/329,886 priority patent/US7043274B2/en
Application filed by InterDigital Technology Corp filed Critical InterDigital Technology Corp
Priority to US11/409,130 priority patent/US20060189355A1/en
Publication of US20060189355A1 publication Critical patent/US20060189355A1/en
Application status is Abandoned legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24Cell structures
    • H04W16/28Cell structures using beam steering
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0491Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A communication system transmits and receives communications within a sectorized cell between at least one primary station and at least one secondary station. The communication system includes a unit for generating and shaping a beam; an antenna for transmitting and receiving signals within said beam; and a unit for directing the beam. The shaped beam is directed at a plurality of predetermined directions; either continuously or discretely.

Description

    CROSS REFERENCE TO RELATED APPLICATION
  • This application claims priority from U.S. patent application Ser. No. 10/329,886 filed Dec. 26, 2002 which in turn claims the benefit of Provisional Patent Application Nos. 60/420,355, filed Oct. 21, 2002, and 60/392,597, filed Jun. 28, 2002, which are incorporated by reference as if fully set forth herein.
  • BACKGROUND
  • Sectoring is a well known technique for providing distinct coverage areas within individual cell sites and can be achieved with “smart antenna” technology. Smart antenna methods dynamically change the radiation pattern of an antenna to form a “beam,” which specifically focuses the antenna's transmitted and received energy and provides a desired topographical coverage. Beam forming is an enhancement on sectoring in that the sectors can be adjusted in direction and width. Both techniques are employed to: 1) reduce interference between cells and the wireless transmit/receive units (WTRUs) deployed within the cells; 2) increase the permissible range between a receiver and a transmitter; and 3) locate the geographic position of a WRTU. These techniques are usually applied to the dedicated channels of the WRTUs once their general location is known.
  • Prior to knowing the location of a WTRU, the common channels broadcast information that all WTRUs may receive. While this information may be sent in static sectors, it is not sent in variable beams. There are inherent inefficiencies in this approach in that extra steps are required to determine the appropriate beam to use for the dedicated data exchanges. Additionally, the beams must be generally large enough to provide a broad coverage area, which in turn means their power with distance from the transmitter is lower. In such cases, they must use higher power, have longer symbol times and/or more robust encoding schemes to cover the same range.
  • The common channel coverage found in the prior art shown in FIG. 1 has four overlapping wide beams. This provides omni-directional coverage, while giving a degree of reuse to the cell site. It also provides a coarse degree of directivity to the WTRUs (WTRU1, WTRU2) detecting one of the transmissions, by having each sector transmit a unique identifier.
  • Referring to FIG. 2, downlink dedicated beams between a primary station (P) and several WTRUs (WTRU3, WTRU4) are shown. Assuming the same power from the primary station P for FIGS. 1 and 2 and all other attributes being equal, the WTRUs (WTRU3 and WTRU4) shown in FIG. 2 can be further away from the primary station P than the WTRUs (WTRU1, WTRU2) shown in FIG. 1. Alternatively, the coverage areas can be made approximately the same by decreasing the symbol rate or increasing the error correction coding. Either of these approaches decreases the data delivery rate. This also applies to the receiver uplink beam patterns of the primary station P; and the same comments about coverage and options apply for data from the WTRUs to the primary station P.
  • In the prior art, the range of a primary station P or a WTRU is generally increased by combinations of higher power, lower symbol rates, error correction coding and diversity in time, frequency or space. However, these methods yield results that fall short of optimized operation. Additionally, there is a mismatch between the common and dedicated communications channels in the ways that coverage is aligned.
  • The downlink dedicated channels may be transmitted in a beam having a narrower width by a smart antenna. The narrower beam serves a narrower area. The benefit in narrowing the beam is the reduced interference to WTRUs in other areas of the cell, which has a positive impact on the system efficiency. However, dedicated channels are still susceptible to interference generated by the common channels. The common channels have to be available to all mobiles in the entire coverage area. FIG. 3 shows the radiation pattern for the current deployment of a cellular system using a smart antenna system emitting a beam with a narrow width over a small coverage area 10 for the dedicated channel coverage and an omni-directional antenna emitting an omni-directional pattern over a wide coverage area 12 for the common channel coverage. Since the common channel is transmitted at a high output power to ensure complete cell coverage, a WTRU's reception of the dedicated channel may be interfered with as the WTRU's location becomes closer to the high powered common channel transmitter.
  • It is therefore desirable to provide a method of providing equitable coverage for both common and dedicated channels in wireless communication systems without the disadvantages of prior art.
  • SUMMARY
  • A communication system for transmitting and receiving common channel and dedicated channel communications between at least one primary station and at least one secondary station in a sectorized cell uses at least one beam comprising an antenna. The system includes a device for generating and shaping the beam; and a device for sweeping the shaped beam. The sweeping device selectively directs the shaped beam at a plurality of directions.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a prior art common channel coverage scheme between a primary station and several WTRUs with four overlapping wide beams.
  • FIG. 2 is a prior art scheme of downlink dedicated beams between a primary station and several WTRUs using dedicated beams.
  • FIG. 3 is a prior art of the radiation pattern for a cellular system using a narrow-width beam over a small coverage area for dedicated channel coverage and an omni-directional pattern over a wide coverage area for common channel coverage.
  • FIG. 4 is a rotating common channel beam emanating from a primary station.
  • FIG. 4A is a flow diagram illustrating sweeping of the common beacon channel.
  • FIG. 5 is a beam configuration for known uneven distribution of WTRUs.
  • FIG. 6 is a beam configuration having the beam width adjusted for traffic type.
  • FIG. 7 is a beam configuration having equivalent coverage areas for both dedicated and common channels.
  • FIG. 8 is a beam configuration having equivalent coverage areas for both dedicated and common channels.
  • FIG. 9 is a flow diagram of an embodiment in which the common beacon channel is swept.
  • FIG. 10 is a flow diagram of an embodiment in which the unique common beacon channels are transmitted to different positions of a cell.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • The present invention will be described with reference to the drawing figures where like numerals represent like elements throughout. The foregoing statements about beam forming are applicable to both transmission of the signal and its reception. For example, narrower transmission beams cause less interference to those devices outside the beam. Conversely, a narrower reception beam decreases interference from signals outside the beam. The foregoing description of the invention is applicable to both the reception and transmission of signals. The context of a particular part of the description will sometimes explicitly refer to reception or transmission when this is not case.
  • This invention generally relates to considerations of coverage in a wireless communication system utilizing smart antennas to emit both common and dedicated channels, and to providing similar coverage for common and dedicated channels. The common channels are utilized, as their name implies, by all devices. The system and method of the present invention formats these common channels in a fashion that provides useful information to the system and the WTRU for eventual establishment of the dedicated channels.
  • Referring to FIG. 4, the dashed outlines represent possible positions P1-Pn for a common channel beam B emanating from a primary station (PS). At a particular time period, the beam B exists only in one of the positions P1 as illustrated by the solid outline. The arrow shows the time sequencing of the beam B. In this illustration, the beam B sequentially moves from one clockwise position P1 to another P2-Pn, although a clockwise rotation is not necessary.
  • The system provides for identifying the beam B at each of the positions P1-Pn. FIG. 4A is a flow diagram of a method 40 in accordance with the embodiment of the invention shown in FIG. 4. The transmitted identifying beam B, which includes a unique identifier while the beam B is in each position P1-Pn, is swept around the cell (step 41). For example, at a first position P1 a first identifier I1 will be transmitted, at a second position P2 a second identifier I2 will be generated, and so on for each of the positions P1-Pn. If the beam B is swept continuously, a different identifier I1-Im may be generated for each degree, (or preset number of degrees), of rotation.
  • When a WRTU successfully acquires the beacon common channel (step 42), it reports the identifier number of the common channel it acquires to the PS (step 44). This information is used by the system to determine the WTRUs location (step 46). The PS then assigns a dedicated channel in the proper direction of the WTRU (step 48). Since the common channels are only in one sector for a short period of time, the overall interference caused by the common channels to the dedicated channels is substantially reduced. A minor disadvantage may be an extended acquisition time, but the disadvantage could be alleviated by increasing the data rate of the common channels.
  • A second embodiment for identifying the position P1-Pn of the beam B is to use a time mark as a type of identifier, which the WTRU returns to the PS. Returning either the time mark or the identifier to the PS informs the PS which beam B was detected by the WTRU. For that time period, the PS now knows the position P1-Pn of the beam B that was able to communicate with the WTRU. However, it should be noted that due to possible reflections, this is not necessarily the direction of the WTRU from the PS.
  • A third embodiment for identifying the position P1-Pn of the beam B is to use time-synchronization. The beam B is positioned and correlated with a known time mark. One way of achieving this is for both the WTRUs and the PS to have access to the same time reference, such as the global positioning system (GPS), National Institute of Standards and Technology internet time or radio time broadcasts (WWV) or local clocks with adequate synchronization maintained.
  • A fourth embodiment for identifying the position P1-Pn of the beam B is for the WTRUs and the PS to synchronize to timing marks coming from the infrastructure transmissions. The WTRUs can detect beam transmissions identifying the PS, but not necessarily the individual beam B positions P1-Pn. By the WTRU reporting back to the PS the time factor when it detected the beam B, the PS can determine which beam B the WTRU is referencing. The benefit of this embodiment is that the common channel transmission does not have to be burdened with extra data to identify the position P1-Pn of the beam B.
  • A fifth embodiment for identifying the position of the beam B is to incorporate a GPS receiver within the WTRU. The WTRU then determines its geographical location by latitude and longitude and reports this information to the PS. The PS can then use this information to precisely generate the direction of the beam B, beam width and power. Another advantage of this embodiment is the precise location obtained of the WTRU, which will allow users to locate the WTRU if the need arises.
  • Referring to FIG. 5, the beam pattern may be tailored as desired by the system administrator. In this manner, the PS may position the beam B in a pattern consistent with the expected density of WTRUs in a particular area. For example, a wide beam W1, W2, W3 may be cast in positions P1, P2, P3, respectively with few WTRUs, and more narrow beams N4, N5, N6 cast in positions P4, P5, P6, respectively with many WTRUs. This facilitates the creation of narrower dedicated beams B in the denser areas and also increases the capacity for the uplink and downlink use of the common channels to establish initial communications.
  • The beam width manipulation is preferably performed in real time. However, the conditions of communication and the nature of the application determine the suitability of the number of beam positions P1-Pn and their associated beam width patterns. The beam patterns formed should be sufficiently wide such that the number of WTRUs entering and leaving the beam can be handled without excessive handoff to other beams. A static device can be serviced by a narrow beam. Swiftly moving cars for example, could not be serviced effectively by a narrow beam perpendicular to the flow of traffic, but could be serviced by a narrow beam parallel to the direction of travel. A narrow perpendicular beam would only be adequate for short message services, not for voice services such as phone calls.
  • Another advantage to using different beam widths is the nature of the movement of WTRUs within a region. Referring to FIG. 6, a building BL is shown (representing an area having primarily slower moving pedestrian-speed devices WTRUs), and a highway H is shown (representing an area having primarily faster-moving devices WTRUf). The slower speed devices WTRUs can be served by narrow beams N1-N3 that are likely to be traversed during a communication time period. Alternatively, the faster moving devices WTRUf require wider beams W1-W3 to support a communication.
  • Beam width shaping also decreases the frequency of handover of WTRUs from one beam B to another. Handover requires the use of more system resources than a typical communication since two independent communication links are maintained while the handover is occurring. Handover of beams also should be avoided because voice communications are less able to tolerate the latency period often associated with handover.
  • Data services are packet size and volume dependent. Although a few small packets may be transmitted without problems, a large packet requiring a significant number of handovers may utilize excessive bandwidth. This would occur when links are attempted to be reestablished after a handover. Bandwidth would also be used up when multiple transmissions of the same data is sent in an attempt to perform a reliable transfer.
  • Downlink common channel communication will often be followed by uplink transmissions. By knowing the transmission pattern of the PS, the WTRU can determine the appropriate time to send its uplink transmission. To perform the necessary timing, a known fixed or broadcast time relationship is utilized. In the case of a fixed relationship, the WTRU uses a common timing clock. The WTRU waits until a time in which the PS has formed a beam over the WTRU's sector before transmitting. In the case of a broadcast time relationship, the PS informs the WTRU when to send its uplink signal. The uplink and downlink beam forming may or may not overlap. It is often an advantage to avoid overlap, so that a device responding to a transmission can respond in less time than would be required to wait an entire antenna beam forming timing cycle for the same time slot to occur.
  • It should be noted that CMDA and other RF protocols utilize some form of time division. When responding to these types of temporal infrastructures, both beam sectoring and the time slots of the protocol would be of concern. Other non-time dependent RF protocols, such as slotted Aloha would only involve sectoring.
  • The embodiment described hereinbefore was directed to “sweeping” the beam B around a PS in a sequential manner. In many instances this will typically be the most convenient way to implement the invention. There are, however, alternative ways to assume the various positions. For instance, it may be desirable to have more instances of coverage in certain areas. This could be done generating the beam in a sequence of timed positions. For instance, if there are 7 positions, (numbered 1 through 7), a sequence of (1, 2, 3, 4, 2, 5, 6, 2, 7, 1) could be used. This would have the area covered by beam position number 2 more often than other positions, but with the same dwell time. It might also be desirable to have a longer dwell time in a region. The sequence (1, 2, 3, 4, 4, 5, 6, 7, 1) for instance would have beam position number 4 remain constant for two time periods. Any suitable sequencing could be utilized and modified as analysis of the situation warranted.
  • Likewise, it is not necessary to restrict the beam positions to a rotating pattern. The beam positions could be generated in any sequence that serves the operation of the communication system. For example, a pattern that distributed the beams B over time such that each quadrant was covered by at least one beam B might be useful for WTRUs that are closer to the PS and are likely to be covered by more than one beam position.
  • It should be noted that similar to all RF transmissions, an RF signal only stops at a physical point if there is a Faraday-type of obstruction, (e.g. grounded metal roof). Usually the signal dies off, and the boundary is some defined attenuation value from the peak value of the transmission. To provide adequate coverage in the application of this invention, it is preferable that adjacent beam positions overlap to some degree. The overlap will tend to be more pronounced closer to the transmission and reception antennas. Close to an infrastructure antenna site, any WTRU is therefore likely able to communicate via a number of differently positioned beams B. Devices able to communicate via several beam positions could therefore, if needed, achieve higher data rates using these multiple positions. Devices further away, however, are more likely to be able to communicate via only once instant of beaming, and to obtain higher data rates would require another technique such as a longer dwell time.
  • Referring to FIG. 7, which is an embodiment where the common beacon channel is swept through a cell which is divided into n number of P positions, designated P1 through Pn. Each position P represents a different common channel beam B. A WTRU is located in beam position P3 and a PS is located at the center of the cell.
  • Referring to FIG. 9, a procedure in accordance with the embodiment of the present invention of FIG. 7 is shown. The procedure 81 commences as the common beacon channel is swept around the cell (step 91) through positions P1 to Pn. Each position P represents the physical location of the antenna's focused energy and its an identifier of the unique common beacon channel signal. A WTRU located in the cell's coverage area acquires a unique common beacon channel (step 92). The WTRU then reports back to the PS the acquired beam's identifier (step 94). The PS receives the identifier from the WTRU and determines the WTRUs location (step 96). The WTRU then assigns a dedicated channel to the direction of the WTRU (step 98).
  • Another embodiment of the present invention, shown in FIG. 8, comprises having a common channel beam present in every sector, without having to sweep about the cell's coverage area. Although such an alternative slightly increases the interference in the cell, it provides the same amount of coverage area for both the common and dedicated channels. As shown, the PS has eight positions P1-P8, each representing a different unique common beacon channel signal which are not swept. A WTRU is located in position P4.
  • Referring to FIG. 10, an alternative procedure 100 in accordance with the embodiment of the invention of FIG. 8 is shown. Eight unique common beacon channel signals are transmitted into the cell (step 101) in positions P1 to P8. Each position P represents the physical location of the antenna's focused energy and an identifier of the unique common beacon channel signal. A WTRU located in the cell's coverage area acquires one of the eight unique common beacon channels (step 102) and the WTRU reports back to the PS which beam it acquired by the beam's identifier (step 104). The PS receives the identifier from the WTRU and determines the location of the WTRU (step 106). The PS then assigns a dedicated channel to the direction of the WTRU (step 108).
  • In the case of a WTRU being located on or near the border of two or more sectors, the WTRU may have difficulty identifying to which sector to associate. When the WTRU acquires a sector, the system deploys hysteresis in its accusation algorithm to ensure that the WTRU has an acceptable signal quality for some definite time before the WTRU hops to another sector.
  • It should be understood by those of skill in the art, that the number of beams, or beam positions located throughout a cell as described herein has been used by way of example. A greater or lesser number of beams, or beam positions, may be implemented without deporting from the spirit and scope of the present invention.

Claims (24)

1. A method for transmitting and receiving communications between at least one base station and at least one wireless transmit/receive unit (WTRU), where the base station transmits a plurality of common channels covering a sectorized cell using at least one beam, the method comprising:
generating at a base station at least one shaped beam for transmitting and receiving a communication;
sweeping the shaped beam, wherein the beam is selectively directed at a plurality of locations, each location at a predetermined time;
receiving the sweeped beam at a WTRU;
determining at said WTRU the time of receipt of the sweeped beam;
reporting from the WTRU to said base station the time of receipt of the sweeped beam; and
determining the location of said WTRU based on the reported time of receipt of the received beam.
2. The method of claim 1, further comprising:
transmitting from said base station a dedicated channel beam based on said determined location for communication with said WTRU.
3. The method of claim 1, wherein said base station shapes the beams into one of a plurality of selectable widths; ranging from a wide width to a narrow width.
4. The method of claim 3, wherein the beam width is selected so that the number of WTRUs entering or leaving the beam is below a predetermined threshold.
5. The method of claim 4, wherein if the number of WTRUs entering or leaving the beam is above the predetermined threshold, the beam width is widened.
6. The method of 1, wherein said plurality of directions coincide with the sectors of the cell.
7. The method of claim 1, wherein the cell sectors are different sizes and the beams are shaped to cover the cell sectors.
8. The method of claim 1, wherein the beam is sweeped to cover a plurality of directions in a predetermined sequence.
9. The method claim 8, wherein the sequence is consecutive.
10. The method claim 8, wherein the sequence is non-consecutive.
11. The method of claim 10, wherein the non-consecutive sequence causes the beam to be directed toward at least one of the plurality of directions more frequently than others of the plurality of directions.
12. The method of claim 10, wherein the non-consecutive sequence causes the beam to be directed toward some of the plurality of directions for a longer duration than others of the plurality of directions.
13. A wireless communication system for transmitting and receiving communications between at least one base station and at least one wireless transmit/receive unit (WTRU), where the base station transmits a plurality of common channels covering a sectorized cell using at least one beam, the system comprising:
at least one base station comprising:
a beam generator for generating at least one shaped beam for transmitting and receiving a communication;
a beam sweeper for sweeping the shaped beam, wherein the beam is selectively directed at a plurality of locations, each location at a predetermined time; and
a processor configured for determining the location of said WTRU based on a reported time of receipt of a received beam; and
at least one wireless transmit/receive unit (WTRU) comprising:
a transceiver for receiving a shaped beam from said base station; and
a processor configured for determining the time of receipt of the sweeped beam;
wherein the WTRU reports the time of receipt of the sweeped beam to said base station.
14. The system of claim 13, wherein the base station transmits a dedicated channel beam based on said determined location for communication with said WTRU.
15. The system of claim 13, wherein said base station shapes the beams into one of a plurality of selectable widths; ranging from a wide width to a narrow width.
16. The system of claim 15, wherein the beam width is selected so that the number of WTRUs entering or leaving the beam is below a predetermined threshold.
17. The system of claim 16, wherein if the number of WTRUs entering or leaving the beam is above the predetermined threshold, the beam width is widened.
18. The system of claim 13, wherein said plurality of directions coincide with the sectors of the cell.
19. The system of claim 13, wherein the cell sectors are different sizes and the beams are shaped to cover the cell sectors.
20. The system of claim 13, wherein the beam is sweeped to cover a plurality of directions in a predetermined sequence.
21. The system claim 20, wherein the sequence is consecutive.
22. The system claim 20, wherein the sequence is non-consecutive.
23. The system of claim 22, wherein the non-consecutive sequence causes the beam to be directed toward at least one of the plurality of directions more frequently than others of the plurality of directions.
24. The system of claim 22, wherein the non-consecutive sequence causes the beam to be directed toward some of the plurality of directions for a longer duration than others of the plurality of directions.
US11/409,130 2002-06-28 2006-04-21 System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping Abandoned US20060189355A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US39259702P true 2002-06-28 2002-06-28
US42035502P true 2002-10-21 2002-10-21
US10/329,886 US7043274B2 (en) 2002-06-28 2002-12-26 System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping
US11/409,130 US20060189355A1 (en) 2002-06-28 2006-04-21 System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/409,130 US20060189355A1 (en) 2002-06-28 2006-04-21 System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10/329,886 Continuation US7043274B2 (en) 2002-06-28 2002-12-26 System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping

Publications (1)

Publication Number Publication Date
US20060189355A1 true US20060189355A1 (en) 2006-08-24

Family

ID=27739131

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/329,886 Expired - Fee Related US7043274B2 (en) 2002-06-28 2002-12-26 System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping
US11/409,130 Abandoned US20060189355A1 (en) 2002-06-28 2006-04-21 System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US10/329,886 Expired - Fee Related US7043274B2 (en) 2002-06-28 2002-12-26 System for efficiently providing coverage of a sectorized cell for common and dedicated channels utilizing beam forming and sweeping

Country Status (13)

Country Link
US (2) US7043274B2 (en)
EP (1) EP1527618A4 (en)
JP (2) JP2005531987A (en)
KR (8) KR20050098022A (en)
CN (3) CN101702809A (en)
AR (2) AR040292A1 (en)
AU (1) AU2003279933A1 (en)
CA (1) CA2490951A1 (en)
DE (1) DE20309955U1 (en)
GB (1) GB0315284D0 (en)
MY (1) MY136848A (en)
TW (5) TWI249319B (en)
WO (1) WO2004004370A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120034921A1 (en) * 2006-07-14 2012-02-09 Qualcomm Incorporated Expedited Handoff
US20120190308A1 (en) * 2009-04-22 2012-07-26 Broadcom Corporation Transceiver with plural space hopping phased array antennas and methods for use therewith
US8401590B2 (en) 2008-03-11 2013-03-19 Intel Corporation Combined omni- and directional-communications in high-frequency wireless networks
US20150200451A1 (en) * 2014-01-16 2015-07-16 Electronics And Telecommunications Research Institute Control method for radiation beam direction of wireless transmission device
US9160434B2 (en) 2011-10-28 2015-10-13 Broadcom Corporation RF transceiver with beamforming antenna and methods for use therewith
US9801106B2 (en) 2014-01-22 2017-10-24 Telefonaktiebolaget Lm Ericsson (Publ) Network node, access nodes and method for assisting user equipments to receive signals in wireless communication network
WO2018028960A1 (en) * 2016-08-12 2018-02-15 Sony Corporation Telecommunications apparatus and methods for determining location of terminal device using beam sweeping
WO2019002867A1 (en) * 2017-06-30 2019-01-03 First Rail Holdings Limited Communicating with a mobile device

Families Citing this family (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7295509B2 (en) 2000-09-13 2007-11-13 Qualcomm, Incorporated Signaling method in an OFDM multiple access system
US9130810B2 (en) 2000-09-13 2015-09-08 Qualcomm Incorporated OFDM communications methods and apparatus
US20040077379A1 (en) * 2002-06-27 2004-04-22 Martin Smith Wireless transmitter, transceiver and method
US6785559B1 (en) * 2002-06-28 2004-08-31 Interdigital Technology Corporation System for efficiently covering a sectorized cell utilizing beam forming and sweeping
US7203520B2 (en) 2003-09-30 2007-04-10 Nortel Networks Limited Beam wobbling for increased downlink coverage and capacity
EP1562306A1 (en) * 2004-02-09 2005-08-10 Alcatel Alsthom Compagnie Generale D'electricite Fast beam selection with macrodiversity
US7158814B2 (en) 2004-06-10 2007-01-02 Interdigital Technology Corporation Method and system for utilizing smart antennas establishing a backhaul network
CN102571166B (en) * 2004-06-10 2016-08-03 美商内数位科技公司 Establishing a backhaul network using a smart antenna and a method and a radio communication system node
US9148256B2 (en) 2004-07-21 2015-09-29 Qualcomm Incorporated Performance based rank prediction for MIMO design
US9137822B2 (en) 2004-07-21 2015-09-15 Qualcomm Incorporated Efficient signaling over access channel
US6992622B1 (en) 2004-10-15 2006-01-31 Interdigital Technology Corporation Wireless communication method and antenna system for determining direction of arrival information to form a three-dimensional beam used by a transceiver
US8611284B2 (en) 2005-05-31 2013-12-17 Qualcomm Incorporated Use of supplemental assignments to decrement resources
US9246560B2 (en) 2005-03-10 2016-01-26 Qualcomm Incorporated Systems and methods for beamforming and rate control in a multi-input multi-output communication systems
US8446892B2 (en) 2005-03-16 2013-05-21 Qualcomm Incorporated Channel structures for a quasi-orthogonal multiple-access communication system
US9143305B2 (en) 2005-03-17 2015-09-22 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9520972B2 (en) 2005-03-17 2016-12-13 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9461859B2 (en) 2005-03-17 2016-10-04 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9184870B2 (en) 2005-04-01 2015-11-10 Qualcomm Incorporated Systems and methods for control channel signaling
US9408220B2 (en) 2005-04-19 2016-08-02 Qualcomm Incorporated Channel quality reporting for adaptive sectorization
US9036538B2 (en) 2005-04-19 2015-05-19 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
US8462859B2 (en) 2005-06-01 2013-06-11 Qualcomm Incorporated Sphere decoding apparatus
US9179319B2 (en) * 2005-06-16 2015-11-03 Qualcomm Incorporated Adaptive sectorization in cellular systems
US8599945B2 (en) 2005-06-16 2013-12-03 Qualcomm Incorporated Robust rank prediction for a MIMO system
US8885628B2 (en) 2005-08-08 2014-11-11 Qualcomm Incorporated Code division multiplexing in a single-carrier frequency division multiple access system
US20070041457A1 (en) 2005-08-22 2007-02-22 Tamer Kadous Method and apparatus for providing antenna diversity in a wireless communication system
US9209956B2 (en) 2005-08-22 2015-12-08 Qualcomm Incorporated Segment sensitive scheduling
US8644292B2 (en) 2005-08-24 2014-02-04 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
US9136974B2 (en) 2005-08-30 2015-09-15 Qualcomm Incorporated Precoding and SDMA support
US8699955B2 (en) * 2005-09-16 2014-04-15 Interdigital Technology Corporation Method and apparatus to transmit and receive data in a wireless communication system having smart antennas
US8068872B2 (en) 2005-10-06 2011-11-29 Telefonaktiebolaget Lm Ericsson (Publ) Signaling support for antenna selection using subset lists and subset masks
US9210651B2 (en) 2005-10-27 2015-12-08 Qualcomm Incorporated Method and apparatus for bootstraping information in a communication system
US8045512B2 (en) 2005-10-27 2011-10-25 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US9088384B2 (en) 2005-10-27 2015-07-21 Qualcomm Incorporated Pilot symbol transmission in wireless communication systems
US8693405B2 (en) 2005-10-27 2014-04-08 Qualcomm Incorporated SDMA resource management
US9144060B2 (en) 2005-10-27 2015-09-22 Qualcomm Incorporated Resource allocation for shared signaling channels
US9225416B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Varied signaling channels for a reverse link in a wireless communication system
US8565194B2 (en) 2005-10-27 2013-10-22 Qualcomm Incorporated Puncturing signaling channel for a wireless communication system
US8477684B2 (en) 2005-10-27 2013-07-02 Qualcomm Incorporated Acknowledgement of control messages in a wireless communication system
US9225488B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Shared signaling channel
US9172453B2 (en) 2005-10-27 2015-10-27 Qualcomm Incorporated Method and apparatus for pre-coding frequency division duplexing system
US8879511B2 (en) 2005-10-27 2014-11-04 Qualcomm Incorporated Assignment acknowledgement for a wireless communication system
US8582509B2 (en) 2005-10-27 2013-11-12 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US8582548B2 (en) 2005-11-18 2013-11-12 Qualcomm Incorporated Frequency division multiple access schemes for wireless communication
US8831607B2 (en) 2006-01-05 2014-09-09 Qualcomm Incorporated Reverse link other sector communication
CN101064558B (en) 2006-04-26 2011-12-28 上海大唐移动通信设备有限公司 A method in a wireless communications system for broadcast multicast
US7961640B2 (en) 2006-10-26 2011-06-14 Qualcomm Incorporated Method and apparatus for codebook exchange in a multiple access wireless communication system
US8208392B2 (en) * 2007-08-13 2012-06-26 Samsung Electronics Co., Ltd. System and method for peer-to-peer beam discovery and communication in infrastructure based wireless networks using directional antennas
US8917675B2 (en) * 2007-08-20 2014-12-23 Samsung Electronics Co., Ltd. System and method for multiple contention access periods
KR101478392B1 (en) * 2007-10-04 2014-12-31 애플 인크. Forming spatial beams within a cell segment
KR101591532B1 (en) 2008-05-30 2016-02-03 호야 가부시키가이샤 Optical glasses preforms for precision press molding optical elements process for production of them and imaging devices
US8817676B2 (en) * 2008-11-03 2014-08-26 Samsung Electronics Co., Ltd. Method and system for station-to-station directional wireless communication
US8335170B2 (en) * 2008-11-25 2012-12-18 Intel Corporation Directional transmission techniques
US8385362B2 (en) * 2009-01-09 2013-02-26 Samsung Electronics Co., Ltd. Method and system for contention-based medium access schemes for directional wireless transmission with asymmetric antenna system (AAS) in wireless communication systems
EP2540108B1 (en) * 2010-02-24 2014-06-04 InterDigital Patent Holdings, Inc. Communication using directional antennas
CN102918879B (en) * 2010-05-14 2017-04-19 皇家飞利浦电子股份有限公司 Method and apparatus for deterministic wireless device orientation found
JP5753022B2 (en) * 2011-08-15 2015-07-22 株式会社Nttドコモ Wireless communication system, a radio base station apparatus, a user terminal and a radio communication method
US9439096B2 (en) * 2012-08-13 2016-09-06 Samsung Electronics Co., Ltd. Method and apparatus to support channel refinement and multi-stream transmission in millimeter wave systems
KR101957783B1 (en) * 2012-09-12 2019-03-13 삼성전자주식회사 Apparatus and method for handover in wireless communication system
CN108769894A (en) * 2014-07-25 2018-11-06 华为技术有限公司 Communication device and method in high-frequency system
WO2016011669A1 (en) * 2014-07-25 2016-01-28 华为技术有限公司 Communication device and method for resource allocation
US9903937B2 (en) * 2014-08-18 2018-02-27 Qualcomm Incorporated Using known geographical information in directional wireless communication systems
US20180234156A1 (en) * 2017-02-13 2018-08-16 Mediatek Inc. Apparatuses and methods for beam sweeping in a wireless communication system

Citations (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236849A (en) * 1976-09-15 1980-12-02 Imperial Chemical Industries Limited Method of grouting a drill hole
US5539413A (en) * 1994-09-06 1996-07-23 Northrop Grumman Integrated circuit for remote beam control in a phased array antenna system
US5596329A (en) * 1993-08-12 1997-01-21 Northern Telecom Limited Base station antenna arrangement
US5596333A (en) * 1994-08-31 1997-01-21 Motorola, Inc. Method and apparatus for conveying a communication signal between a communication unit and a base site
US5598163A (en) * 1992-04-30 1997-01-28 Thomson-Csf Method and system for object detection within an angular zone, and its applications
US5621752A (en) * 1994-06-23 1997-04-15 Qualcomm Incorporated Adaptive sectorization in a spread spectrum communication system
US5701583A (en) * 1992-11-17 1997-12-23 Southwestern Bell Technology Resources, Inc. Land-based wireless communications system having a scanned directional antenna
US5859612A (en) * 1996-06-06 1999-01-12 Qualcomm Incorporated Method for using an antenna with a rotating beam for determining the position of a mobile subscriber in a CDMA cellular telephone system
US5894598A (en) * 1995-09-06 1999-04-13 Kabushiki Kaisha Toshiba Radio communication system using portable mobile terminal
US5907816A (en) * 1995-01-27 1999-05-25 Marconi Aerospace Systems Inc. Advanced Systems Division High gain antenna systems for cellular use
US6081233A (en) * 1997-05-05 2000-06-27 Telefonaktiebolaget Lm Ericsson Butler beam port combining for hexagonal cell coverage
US6118767A (en) * 1997-11-19 2000-09-12 Metawave Communications Corporation Interference control for CDMA networks using a plurality of narrow antenna beams and an estimation of the number of users/remote signals present
US6141335A (en) * 1996-12-06 2000-10-31 Hitachi, Ltd. Radio communication system
US6167286A (en) * 1997-06-05 2000-12-26 Nortel Networks Corporation Multi-beam antenna system for cellular radio base stations
US6178333B1 (en) * 1998-04-15 2001-01-23 Metawave Communications Corporation System and method providing delays for CDMA nulling
US6205337B1 (en) * 1998-05-06 2001-03-20 Alcatel Canada Inc. Use of sectorized polarization diversity as a means of increasing capacity in cellular wireless systems
US6233466B1 (en) * 1998-12-14 2001-05-15 Metawave Communications Corporation Downlink beamforming using beam sweeping and subscriber feedback
US6236849B1 (en) * 1997-07-15 2001-05-22 Metawave Communications Corporation System and method of determining a mobile station's position using directable beams
US20010016504A1 (en) * 1998-04-03 2001-08-23 Henrik Dam Method and system for handling radio signals in a radio base station
US6289005B1 (en) * 1997-02-13 2001-09-11 Nokia Telecommunications Oy Method and apparatus for directional radio communication
US6301238B1 (en) * 1997-01-28 2001-10-09 Telefonaktiebolaget Lm Ericsson (Publ) Directional-beam generative apparatus and associated method
US6311075B1 (en) * 1998-11-24 2001-10-30 Northern Telecom Limited Antenna and antenna operation method for a cellular radio communications system
US6330460B1 (en) * 2000-08-21 2001-12-11 Metawave Communications Corporation Simultaneous forward link beam forming and learning method for mobile high rate data traffic
US6345188B1 (en) * 1995-05-24 2002-02-05 Nokia Telecommunications Oy Base station for phasing a transmission signal to a mobile unit based on information recieved from the mobile unit
US6347220B1 (en) * 1998-03-18 2002-02-12 Fujitsu Limited Multiple-beam antenna system of wireless base station
US20020034943A1 (en) * 1996-05-22 2002-03-21 Jorma Pallonen Method and system for selecting an antenna beam of a base station of radio system
US20020039912A1 (en) * 2000-10-02 2002-04-04 Ntt Docomo, Inc. Mobile communication base station equipment
US6370377B1 (en) * 1998-08-26 2002-04-09 Mitsubishi Denki Kabushiki Kaisha Mobile radio communication system
US20020054580A1 (en) * 1994-02-14 2002-05-09 Strich W. Eli Dynamic sectorization in a spread spectrum communication system
US6388634B1 (en) * 2000-10-31 2002-05-14 Hughes Electronics Corporation Multi-beam antenna communication system and method
US20020072393A1 (en) * 2000-12-11 2002-06-13 Mcgowan Neil Antenna systems with common overhead for CDMA base stations
US20020094843A1 (en) * 2000-12-20 2002-07-18 Hunzinger Jason F. Intelligent base station antenna beam-steering using mobile multipath feedback
US6453177B1 (en) * 1999-07-14 2002-09-17 Metawave Communications Corporation Transmitting beam forming in smart antenna array system
US20020146983A1 (en) * 2001-02-06 2002-10-10 Scherzer Shimon B. Wireless link quality using location based learning
US20020159405A1 (en) * 2000-06-29 2002-10-31 Garrison G. Jack Frequency re-use for point to multipoint applications
US20020160781A1 (en) * 2001-02-23 2002-10-31 Gunnar Bark System, method and apparatus for facilitating resource allocation in a communication system
US6484031B1 (en) * 1997-12-11 2002-11-19 Nokia Telecommunications Oy Locating method and arrangement
US6498939B1 (en) * 1999-07-20 2002-12-24 Texas Instruments Incorporated Wireless network
US20020199196A1 (en) * 2001-06-21 2002-12-26 Matthew Rabinowitz Position location using global positioning signals augmented by broadcast television signals
US20030017853A1 (en) * 2001-07-12 2003-01-23 Sarnoff Corporation Method and apparatus for enhancing the data transmission capacity of a wireless communication system
US20030040337A1 (en) * 2000-03-01 2003-02-27 Juha Ylitalo Method including a radio transmitter for improving radio link operation
US6553012B1 (en) * 1997-02-13 2003-04-22 Nokia Telecommunications Oy Method and apparatus for directional radio communication
US6577879B1 (en) * 2000-06-21 2003-06-10 Telefonaktiebolaget Lm Ericsson (Publ) System and method for simultaneous transmission of signals in multiple beams without feeder cable coherency
US6611695B1 (en) * 1999-12-20 2003-08-26 Nortel Networks Limited Method and apparatus for assigning frequency channels to a beam in a multi-beam cellular communications system
US20030193925A1 (en) * 1998-11-25 2003-10-16 Syed Aon Mujtaba Methods and apparatus for wireless communication using orthogonal frequency division multiplexing
US20040157637A1 (en) * 2003-02-12 2004-08-12 David Steer Transit link coordination systems and methods for a distributed wireless communication network
US6795699B1 (en) * 2000-06-27 2004-09-21 Motorola, Inc. Geolocation techniques for an airborne cellular system
US6798699B2 (en) * 2001-01-30 2004-09-28 Micron Technology, Inc. Flash memory device and method of erasing
US20040203929A1 (en) * 2002-06-07 2004-10-14 Akhteruzzaman Enhanced caller identification
US20040209325A1 (en) * 2003-01-31 2004-10-21 Yinong Yang Mitogen-activated protein kinase and method of use to enhance biotic and abiotic stress tolerance in plants
US20040259564A1 (en) * 2000-07-27 2004-12-23 Interdigital Communications Corp. Optimal load-based wireless session context transfer
US6888634B2 (en) * 1997-07-01 2005-05-03 Jjl Technologies Llc Apparatus and method for measuring optical characteristics of an object
US6980832B1 (en) * 1999-11-08 2005-12-27 Nokia Corporation Method of reducing transmission power in a wireless communication system
US7065383B1 (en) * 2002-04-16 2006-06-20 Omri Hovers Method and apparatus for synchronizing a smart antenna apparatus with a base station transceiver
US7123924B2 (en) * 2002-06-28 2006-10-17 Interdigital Technology Corporation Method and system for determining the speed and position of a mobile unit
US7139324B1 (en) * 2000-06-02 2006-11-21 Nokia Networks Oy Closed loop feedback system for improved down link performance

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW351886B (en) * 1993-09-27 1999-02-01 Ericsson Telefon Ab L M Using two classes of channels with different capacity
JPH09284200A (en) * 1996-04-10 1997-10-31 Mitsubishi Electric Corp Radio communication equipment and radio communication method
SE9601615L (en) * 1996-04-29 1997-10-30 Radio Design Innovation Tj Ab Method for access with rotary lobe
GB2317786B (en) * 1996-09-25 2001-05-30 Motorola Ltd Communication system with a deamformed control channel and method of system control
JP3233088B2 (en) 1998-01-22 2001-11-26 松下電器産業株式会社 Directivity control antenna apparatus
JP4094190B2 (en) 1999-10-26 2008-06-04 三菱電機株式会社 Transmission beam control apparatus and control method
GB0016008D0 (en) * 2000-06-29 2000-08-23 Nokia Networks Oy Capacity changes in transceiver apparatus
AU9216501A (en) * 2000-08-15 2002-02-25 Celletra Ltd Method and apparatus for classifying wireless nodes within cellular communications networks
KR100375826B1 (en) * 2000-11-15 2003-03-15 한국전자통신연구원 Weight calculation unit for forward beamforming in a direct spread CDMA base station system using an array antenna, system for forward beamforming using it and method thereof

Patent Citations (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236849A (en) * 1976-09-15 1980-12-02 Imperial Chemical Industries Limited Method of grouting a drill hole
US5598163A (en) * 1992-04-30 1997-01-28 Thomson-Csf Method and system for object detection within an angular zone, and its applications
US5701583A (en) * 1992-11-17 1997-12-23 Southwestern Bell Technology Resources, Inc. Land-based wireless communications system having a scanned directional antenna
US5596329A (en) * 1993-08-12 1997-01-21 Northern Telecom Limited Base station antenna arrangement
US20020054580A1 (en) * 1994-02-14 2002-05-09 Strich W. Eli Dynamic sectorization in a spread spectrum communication system
US5621752A (en) * 1994-06-23 1997-04-15 Qualcomm Incorporated Adaptive sectorization in a spread spectrum communication system
US5596333A (en) * 1994-08-31 1997-01-21 Motorola, Inc. Method and apparatus for conveying a communication signal between a communication unit and a base site
US5539413A (en) * 1994-09-06 1996-07-23 Northrop Grumman Integrated circuit for remote beam control in a phased array antenna system
US5907816A (en) * 1995-01-27 1999-05-25 Marconi Aerospace Systems Inc. Advanced Systems Division High gain antenna systems for cellular use
US6345188B1 (en) * 1995-05-24 2002-02-05 Nokia Telecommunications Oy Base station for phasing a transmission signal to a mobile unit based on information recieved from the mobile unit
US5894598A (en) * 1995-09-06 1999-04-13 Kabushiki Kaisha Toshiba Radio communication system using portable mobile terminal
US20020034943A1 (en) * 1996-05-22 2002-03-21 Jorma Pallonen Method and system for selecting an antenna beam of a base station of radio system
US5859612A (en) * 1996-06-06 1999-01-12 Qualcomm Incorporated Method for using an antenna with a rotating beam for determining the position of a mobile subscriber in a CDMA cellular telephone system
US6141335A (en) * 1996-12-06 2000-10-31 Hitachi, Ltd. Radio communication system
US6301238B1 (en) * 1997-01-28 2001-10-09 Telefonaktiebolaget Lm Ericsson (Publ) Directional-beam generative apparatus and associated method
US6289005B1 (en) * 1997-02-13 2001-09-11 Nokia Telecommunications Oy Method and apparatus for directional radio communication
US6553012B1 (en) * 1997-02-13 2003-04-22 Nokia Telecommunications Oy Method and apparatus for directional radio communication
US6081233A (en) * 1997-05-05 2000-06-27 Telefonaktiebolaget Lm Ericsson Butler beam port combining for hexagonal cell coverage
US6167286A (en) * 1997-06-05 2000-12-26 Nortel Networks Corporation Multi-beam antenna system for cellular radio base stations
US6888634B2 (en) * 1997-07-01 2005-05-03 Jjl Technologies Llc Apparatus and method for measuring optical characteristics of an object
US6236849B1 (en) * 1997-07-15 2001-05-22 Metawave Communications Corporation System and method of determining a mobile station's position using directable beams
US6118767A (en) * 1997-11-19 2000-09-12 Metawave Communications Corporation Interference control for CDMA networks using a plurality of narrow antenna beams and an estimation of the number of users/remote signals present
US6484031B1 (en) * 1997-12-11 2002-11-19 Nokia Telecommunications Oy Locating method and arrangement
US6347220B1 (en) * 1998-03-18 2002-02-12 Fujitsu Limited Multiple-beam antenna system of wireless base station
US20010016504A1 (en) * 1998-04-03 2001-08-23 Henrik Dam Method and system for handling radio signals in a radio base station
US6178333B1 (en) * 1998-04-15 2001-01-23 Metawave Communications Corporation System and method providing delays for CDMA nulling
US6205337B1 (en) * 1998-05-06 2001-03-20 Alcatel Canada Inc. Use of sectorized polarization diversity as a means of increasing capacity in cellular wireless systems
US6370377B1 (en) * 1998-08-26 2002-04-09 Mitsubishi Denki Kabushiki Kaisha Mobile radio communication system
US6311075B1 (en) * 1998-11-24 2001-10-30 Northern Telecom Limited Antenna and antenna operation method for a cellular radio communications system
US20030193925A1 (en) * 1998-11-25 2003-10-16 Syed Aon Mujtaba Methods and apparatus for wireless communication using orthogonal frequency division multiplexing
US6233466B1 (en) * 1998-12-14 2001-05-15 Metawave Communications Corporation Downlink beamforming using beam sweeping and subscriber feedback
US6453177B1 (en) * 1999-07-14 2002-09-17 Metawave Communications Corporation Transmitting beam forming in smart antenna array system
US6498939B1 (en) * 1999-07-20 2002-12-24 Texas Instruments Incorporated Wireless network
US6980832B1 (en) * 1999-11-08 2005-12-27 Nokia Corporation Method of reducing transmission power in a wireless communication system
US6611695B1 (en) * 1999-12-20 2003-08-26 Nortel Networks Limited Method and apparatus for assigning frequency channels to a beam in a multi-beam cellular communications system
US20030040337A1 (en) * 2000-03-01 2003-02-27 Juha Ylitalo Method including a radio transmitter for improving radio link operation
US7139324B1 (en) * 2000-06-02 2006-11-21 Nokia Networks Oy Closed loop feedback system for improved down link performance
US6577879B1 (en) * 2000-06-21 2003-06-10 Telefonaktiebolaget Lm Ericsson (Publ) System and method for simultaneous transmission of signals in multiple beams without feeder cable coherency
US6795699B1 (en) * 2000-06-27 2004-09-21 Motorola, Inc. Geolocation techniques for an airborne cellular system
US20020159405A1 (en) * 2000-06-29 2002-10-31 Garrison G. Jack Frequency re-use for point to multipoint applications
US20040259564A1 (en) * 2000-07-27 2004-12-23 Interdigital Communications Corp. Optimal load-based wireless session context transfer
US6330460B1 (en) * 2000-08-21 2001-12-11 Metawave Communications Corporation Simultaneous forward link beam forming and learning method for mobile high rate data traffic
US20020039912A1 (en) * 2000-10-02 2002-04-04 Ntt Docomo, Inc. Mobile communication base station equipment
US6388634B1 (en) * 2000-10-31 2002-05-14 Hughes Electronics Corporation Multi-beam antenna communication system and method
US20020072393A1 (en) * 2000-12-11 2002-06-13 Mcgowan Neil Antenna systems with common overhead for CDMA base stations
US20020094843A1 (en) * 2000-12-20 2002-07-18 Hunzinger Jason F. Intelligent base station antenna beam-steering using mobile multipath feedback
US6798699B2 (en) * 2001-01-30 2004-09-28 Micron Technology, Inc. Flash memory device and method of erasing
US20020146983A1 (en) * 2001-02-06 2002-10-10 Scherzer Shimon B. Wireless link quality using location based learning
US20020160781A1 (en) * 2001-02-23 2002-10-31 Gunnar Bark System, method and apparatus for facilitating resource allocation in a communication system
US20020199196A1 (en) * 2001-06-21 2002-12-26 Matthew Rabinowitz Position location using global positioning signals augmented by broadcast television signals
US20030017853A1 (en) * 2001-07-12 2003-01-23 Sarnoff Corporation Method and apparatus for enhancing the data transmission capacity of a wireless communication system
US7065383B1 (en) * 2002-04-16 2006-06-20 Omri Hovers Method and apparatus for synchronizing a smart antenna apparatus with a base station transceiver
US20040203929A1 (en) * 2002-06-07 2004-10-14 Akhteruzzaman Enhanced caller identification
US7123924B2 (en) * 2002-06-28 2006-10-17 Interdigital Technology Corporation Method and system for determining the speed and position of a mobile unit
US20070265020A1 (en) * 2002-06-28 2007-11-15 Interdigital Technology Corporation Method and system for determining the speed and position of a mobile unit
US7248883B2 (en) * 2002-06-28 2007-07-24 Interdigital Technology Corporation Method and system for determining the speed and position of a mobile unit
US20040209325A1 (en) * 2003-01-31 2004-10-21 Yinong Yang Mitogen-activated protein kinase and method of use to enhance biotic and abiotic stress tolerance in plants
US20040157637A1 (en) * 2003-02-12 2004-08-12 David Steer Transit link coordination systems and methods for a distributed wireless communication network

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120034921A1 (en) * 2006-07-14 2012-02-09 Qualcomm Incorporated Expedited Handoff
US8838109B2 (en) * 2006-07-14 2014-09-16 Qualcomm Incorporated Expedited handoff
US8401590B2 (en) 2008-03-11 2013-03-19 Intel Corporation Combined omni- and directional-communications in high-frequency wireless networks
US8798681B2 (en) 2008-03-11 2014-08-05 Intel Corporation Combined omni- and directional-communications in high-frequency wireless networks
US20120190308A1 (en) * 2009-04-22 2012-07-26 Broadcom Corporation Transceiver with plural space hopping phased array antennas and methods for use therewith
US8385844B2 (en) * 2009-04-22 2013-02-26 Broadcom Corporation Transceiver with plural space hopping phased array antennas and methods for use therewith
US9160434B2 (en) 2011-10-28 2015-10-13 Broadcom Corporation RF transceiver with beamforming antenna and methods for use therewith
US20150200451A1 (en) * 2014-01-16 2015-07-16 Electronics And Telecommunications Research Institute Control method for radiation beam direction of wireless transmission device
US9408084B2 (en) * 2014-01-16 2016-08-02 Electronics And Telecommunications Research Institute Control method for radiation beam direction of wireless transmission device
US9801106B2 (en) 2014-01-22 2017-10-24 Telefonaktiebolaget Lm Ericsson (Publ) Network node, access nodes and method for assisting user equipments to receive signals in wireless communication network
US10159023B2 (en) 2014-01-22 2018-12-18 Telefonaktiebolaget Lm Ericsson (Publ) Network node, access nodes and method for assisting user equipments to receive signals in wireless communication network
WO2018028960A1 (en) * 2016-08-12 2018-02-15 Sony Corporation Telecommunications apparatus and methods for determining location of terminal device using beam sweeping
WO2019002867A1 (en) * 2017-06-30 2019-01-03 First Rail Holdings Limited Communicating with a mobile device

Also Published As

Publication number Publication date
JP2005531987A (en) 2005-10-20
TW584361U (en) 2004-04-11
KR20050014022A (en) 2005-02-05
US20040002363A1 (en) 2004-01-01
KR20040066068A (en) 2004-07-23
KR20050090117A (en) 2005-09-12
JP2010004570A (en) 2010-01-07
CN101702808A (en) 2010-05-05
TW201012249A (en) 2010-03-16
WO2004004370A1 (en) 2004-01-08
MY136848A (en) 2008-11-28
EP1527618A4 (en) 2008-12-17
AR062799A2 (en) 2008-12-03
TWI249319B (en) 2006-02-11
KR20100033439A (en) 2010-03-29
CA2490951A1 (en) 2004-01-08
KR200326279Y1 (en) 2003-09-13
KR100742584B1 (en) 2007-08-02
CN101702809A (en) 2010-05-05
TW200503570A (en) 2005-01-16
CN1663293A (en) 2005-08-31
KR20060132767A (en) 2006-12-22
AR040292A1 (en) 2005-03-23
US7043274B2 (en) 2006-05-09
TW200406114A (en) 2004-04-16
TWI314022B (en) 2009-08-21
TW200718243A (en) 2007-05-01
AU2003279933A1 (en) 2004-01-19
DE20309955U1 (en) 2003-12-04
KR20050098022A (en) 2005-10-10
KR100701908B1 (en) 2007-04-02
GB0315284D0 (en) 2003-08-06
KR20080068937A (en) 2008-07-24
EP1527618A1 (en) 2005-05-04

Similar Documents

Publication Publication Date Title
KR100624519B1 (en) System utilizing dynamic beam forming for wireless communication signals
US6005856A (en) Communication protocol for spread spectrum wireless communication system
US7519011B2 (en) Frame structure for radio communications system
US6760599B1 (en) Method and apparatus for selecting a base station
US6563807B1 (en) Inter-frequency handoff execution method and apparatus in mobile communication system
US6879845B2 (en) Wireless communication method and system using beam direction-variable antenna
CN1118968C (en) Method and system for optimizing business channel in wireless communication system
JP4750275B2 (en) System and method for reducing call drop rate of a multi-beam communication system
US8089925B1 (en) Radio communications system with a minimal broadcast channel
US5678187A (en) Method and apparatus for reducing interference in a radio communication link of a cellular communication system
CN104604300B (en) Millimeter wave has access infrastructure access point clusters
US5404376A (en) Navigation assistance for call handling in mobile telephone systems
EP0986867B1 (en) Systems and methods for control channel communication in cellular radiotelephone systems
US5715516A (en) Method and apparatus for wireless communication employing collector arrays
CA2383956C (en) Method and system for initiating idle handoff in a wireless communications system
US6850502B1 (en) Join process method for admitting a node to a wireless mesh network
US7512109B2 (en) Slot structure for radio communications system
JP4422410B2 (en) Wireless communication with adaptable antenna array
US8750933B2 (en) System and method for supporting antenna beamforming in a cellular network
US20030133426A1 (en) Selecting random access channels
CN1871836B (en) Mobile communications system and method for providing common channel coverage using beamforming antennas
CN1064797C (en) Using two classes of channels with different capacity
JP3308835B2 (en) Wireless communication system
US20010016504A1 (en) Method and system for handling radio signals in a radio base station
EP0707779B1 (en) Time division multiple access radio system, method for intracell capacity allocation, and method for performing an intra-cell handover