Search

BR-112018073322-B1 - METHOD FOR WIRELESS COMMUNICATION PERFORMED BY A USER EQUIPMENT (UE), METHOD FOR WIRELESS COMMUNICATION PERFORMED BY A BASE STATION (BS), APPARATUS FOR WIRELESS COMMUNICATIONS, AND COMPUTER-READABLE MEMORY

BR112018073322B1BR 112018073322 B1BR112018073322 B1BR 112018073322B1BR-112018073322-B1

Abstract

Certain aspects of the present disclosure relate generally to wireless communications, and more specifically to the management of transmission resources for requested physical random access channel (PRACH) signals. An exemplary method performed by a base station generally includes providing an indication of a set of transmission resources, within a narrowband region of a wider system bandwidth, to transmit programmed physical random access channel (PRACH) signals by a first user equipment (UE); and transmitting a command to the first UE to transmit a programmed PRACH.

Inventors

  • Renqiu Wang
  • XIAO FENG WANG
  • Hao Xu

Assignees

  • QUALCOMM INCORPORATED

Dates

Publication Date
20260317
Application Date
20170510
Priority Date
20170509

Claims (14)

  1. 1. Method for wireless communication performed by a user equipment, UE (120), characterized in that it comprises: receiving a command from a base station, BS (110), to transmit a scheduled physical random access channel signal, PRACH, to BS (110); obtaining an indication of a scheduled PRACH region comprising a set of transmission resources within a narrowband region of a wider system bandwidth to transmit scheduled PRACH signals to BS (110), wherein the scheduled PRACH region is a subset of a set of PRACH resources indicated by BS (110) reserved for command-based PRACH signals and the indication comprises a parameter indicating an initial offset from a boundary of the scheduled PRACH region in the set of PRACH resources for the PRACH signals; and transmitting the PRACH signal to BS (110) using transmission resources in the scheduled PRACH region.
  2. 2. A method according to claim 1, characterized in that the scheduled PRACH region is updated semi-statically, wherein the semi-static update occurs periodically; and receiving an indication of a time for the semi-static update in a system information block, SIB.
  3. 3. A method according to claim 1, characterized in that the scheduled PRACH region is dynamically updated, the method further comprising: receiving an indication of the dynamic update in a system information block, SIB.
  4. 4. Method according to claim 1, characterized in that the scheduled PRACH region is a subset of a set of data transmission resources, the method further comprising: obtaining an indication that UE(120) should disable random group hopping when transmitting the PRACH signal; and wherein transmitting the PRACH signal comprises transmitting the PRACH signal without using group hopping.
  5. 5. Method according to claim 1, characterized in that the command indicates a time for the UE (120) to transmit the PRACH signal.
  6. 6. Method for wireless communication performed by a base station, BS (110), characterized in that it comprises: providing an indication of a scheduled physical random access channel region, PRACH, comprising a set of transmission resources within a narrowband region of a wider system bandwidth for transmitting scheduled PRACH signals by a first user equipment, UE (120), wherein the scheduled PRACH region is a subset of a set of PRACH resources indicated by BS (110) and reserved for command-based PRACH signals and the indication comprises a parameter indicating an initial offset from a boundary of the scheduled PRACH region in the set of PRACH resources for PRACH signals; and transmitting a first command to the first UE (120) to transmit a scheduled PRACH signal using transmission resources in the scheduled PRACH region.
  7. 7. Method according to claim 6, characterized in that it further comprises: semi-statically updating the scheduled PRACH region, wherein semi-statically updating the scheduled PRACH region comprises periodically updating the scheduled PRACH region, and transmitting a time indication for the semi-static update in a system information block, SIB.
  8. 8. Method according to claim 6, characterized in that it further comprises: determining the command for the first UE (120) to transmit the scheduled PRACH signal; dynamically updating the scheduled PRACH region based on the determination; and transmitting an indication of the dynamic update in a system information block, SIB.
  9. 9. Method according to claim 6, characterized in that the scheduled PRACH region is a subset of a set of data transmission resources.
  10. 10. Method according to claim 6, characterized in that it further comprises: transmitting an indication that the first UE (120) must disable group random hopping when transmitting the scheduled PRACH signal.
  11. 11. Wireless communications apparatus, characterized in that it comprises: means for receiving a command from a base station, BS (110), to transmit a scheduled physical random access channel signal, PRACH, to BS (110); means for obtaining an indication of a scheduled PRACH region comprising a set of transmission resources within a narrowband region of a wider system bandwidth for transmitting scheduled PRACH signals to BS (110), wherein the scheduled PRACH region is a subset of a set of PRACH resources indicated by BS (110) and reserved for command-based PRACH signals and the indication comprises a parameter indicating an initial offset from a boundary of the scheduled PRACH region in the set of PRACH resources for PRACH signals; and means for transmitting the PRACH signal to BS (110) using transmission resources in the scheduled PRACH region.
  12. 12. Apparatus, according to claim 11, characterized in that the PRACH region is updated semi-statically.
  13. 13. Apparatus, according to claim 11, characterized in that the PRACH region is dynamically updated.
  14. 14. Computer-readable memory, characterized in that it comprises instructions stored therein, wherein the instructions, when executed, perform the method steps as defined in any one of claims 1 to 5 or 6 to 10.

Description

Cross-references to related deposit requests [001]This application claims priority over U.S. Application No. 15/591,082, filed Tuesday, May 9, 2017, which claims the benefit of U.S. Provisional Patent Application No. 62/336,548, filed Friday, May 13, 2016, which is granted to the assignee of the patent application and is expressly incorporated herein by reference. BACKGROUND Field of Invention [002]Certain aspects of the present disclosure relate generally to wireless communications, and more specifically to transmission resource management for requested physical random access channel (PRACH) signals. DESCRIPTION OF THE RELATED TECHNIQUE [003] Wireless communication systems are widely employed to provide various types of communication content such as voice, data, and so on. These systems can be typical wireless communication systems or multiple access systems capable of supporting communication with multiple users through the sharing of available system resources (e.g., bandwidth and transmission power). Examples of such multiple access systems include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Long Term Evolution (LTE) of the 3GPP Partnership Project including advanced LTE systems, and Orthogonal Frequency Division Multiple Access (OFDMA) systems. [004]Generally, a wireless multiple access communication system can simultaneously support communication for multiple wireless terminals. Each terminal communicates with one or more base stations through transmissions on forward and reverse links. The forward link (or downlink) refers to the communication link from the base stations to the terminals, and the reverse link (or uplink) refers to the communication link from the terminals to the base stations. This communication link can be established through a single-input single-output, multiple-input single-output, or multiple-input multiple-output (MIMO) system. [005]A wireless communication network can include multiple base stations that can support communication for various wireless devices. Wireless devices can include user equipment (UEs). Some UEs can be considered machine-type communication (MTC) UEs, which can include remote devices that can communicate with a base station, another remote device, or some other entity. Machine-type communication (MTC) can refer to communication involving at least one remote device at at least one end of the communication and can include forms of data communication involving one or more entities that do not necessarily require human interaction. MTC UEs can include UEs that are capable of MTC communications with MTC servers and/or other MTC devices via Public Terrestrial Mobile Networks (PLMN), for example. SUMMARY [006]The systems, methods, and devices of the disclosure each have several aspects, none single aspect of which is solely responsible for its desirable attributes. Without limiting the scope of this disclosure as expressed by the following claims, some features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled “Detailed Description,” a person will understand how the features of this disclosure provide advantages that include improved communications between access points and stations on a wireless network. [007]Certain aspects of the present disclosure provide a method for wireless communications by a base station (BS). The method generally includes providing an indication of a scheduled physical random access channel (PRACH) region comprising a set of transmission resources, within a narrowband region of a wider system bandwidth, for transmitting scheduled PRACH signals by a first user equipment (UE); and transmitting a first command to the first UE to transmit a scheduled PRACH. [008]Certain aspects of the present disclosure provide a method for wireless communication by a user equipment (UE). The method generally includes receiving a command from a base station (BS) to transmit a scheduled physical random access channel (PRACH) signal to the BS, obtaining an indication of a scheduled PRACH region comprising a set of transmission resources, within a narrowband region of a wider system bandwidth, to transmit scheduled PRACH signals to the BS; and transmitting a PRACH signal to the BS using the indicated transmission resources. [009]Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus generally includes a processing system configured to provide an indication of a scheduled physical random access channel (PRACH) region comprising a set of transmission features, within a narrowband region of a wider system bandwidth, for transmitting scheduled PRACH signals by a first user equipment (UE); and for transmitting a first command to the first UE to transmit a scheduled PRACH, and memory coupled to the processor. [0010] Certain aspects of the present disclosure provide an apparatus for wireless communicati