BR-112019003116-B1 - COMMON UPLINK BURST SYMBOL CONFIGURATION

BR112019003116B1BR 112019003116 B1BR112019003116 B1BR 112019003116B1BR-112019003116-B1

Abstract

Methods, systems, and devices for wireless communication are described that provide selection and configuration of the uplink common burst symbol waveform. A waveform for the uplink common burst symbol can be selected to be a single carrier frequency division multiplexing (SC-FDM) waveform, an orthogonal frequency division multiplexing (OFDM) waveform, or combinations thereof, based at least in part on the information to be transmitted. A pattern for SC-FDM sequences can be selected to provide improved channel estimation through common pilot tones across different sequences; wideband or narrowband sequences can be selected based at least in part on the information to be transmitted; and acknowledgment feedback can be transmitted in a final portion of the uplink common burst symbol in some cases to provide additional processing time to determine the acknowledgment feedback.

Inventors

Renqiu Wang
Hao Xu
Peter Gaal
Wanshi Chen
Tingfang JI
SHIMMAN ARVIND PATEL
JOHN EDWARD SMEE

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260317
Application Date: 20170811
Priority Date: 20170810

Claims (15)

1. Method (1900) for wireless communication, characterized in that it comprises: identifying (1905) a common uplink burst symbol for transmitting one or more types of information in an independent wireless communication subframe; determining (1910) one or more types of information to be transmitted in the common uplink burst symbol; select (1915) one from a single carrier frequency division multiplexing transmission waveform, SC-FDM, an orthogonal frequency division multiplexing transmission waveform, OFDM, or a mixed OFDM and SC-FDM transmission waveform for transmission of the common uplink burst symbol based, at least in part, on one or more types of information to be transmitted in the common uplink burst symbol, wherein when the SC-FDM transmission waveform is selected for transmission of the common uplink burst symbol, the transmission comprises selecting a sequence (505) from a set of sequences (505, 510, 515, 520) based, at least in part, on the information to be transmitted in the common uplink burst symbol, the sequence (505) identifying the information, and wherein the sequences different from the set of sequences (505, 510, 515, 520) correspond to different cyclic deviations from a base sequence; and transmit the common uplink burst symbol.
2. A method according to claim 1, characterized in that the sequence set comprises different sequences transmitted in the same frequency band, each of the different sequences associated with a different combination of scheduling request, SR, or feedback information, or polling reference signal information, SRS, or any combination thereof.
3. Method, according to claim 1, characterized in that the cyclic deviations are selected to provide a subset of frequency tones having the same value regardless of the cyclic deviations from the base sequence.
4. A method according to claim 1, characterized in that each of the sequence sets has a sequence length of N and the information to be transmitted in the common uplink burst symbol has M possible states, and wherein the sequences are selected to provide equally spaced sequences in frequency for M cyclic deviations associated with the M possible states of the information.
5. Method according to claim 4, characterized in that N is not a multiple of M.
6. Method according to claim 4, characterized in that N is a multiple of M.
7. Method, according to claim 1, characterized in that each of the cyclic deviations is associated with a combination of polling reference signal, SRS, scheduling request, SR, and feedback information.
8. Method according to claim 1, characterized in that selecting the sequence from the set of sequences further comprises: selecting a single carrier frequency division multiplexing (SC-FDM) waveform sequence from a set of available SC-FDM sequences based, at least in part, on the information to be transmitted in the common uplink burst symbol; wherein selecting the SC-FDM sequence comprises: determining that the information to be transmitted in the common uplink burst symbol comprises one or more of the following: polling reference signal (SRS) information, scheduling request (SR) information, or feedback information associated with a downlink transmission; identifying a set of broadband SC-FDM sequences and a set of narrowband SC-FDM sequences; selecting the SC-FDM sequence from the set of broadband SC-FDM sequences when SRS information has to be transmitted in the common uplink burst symbol; Select the SC-FDM sequence from the narrowband SC-FDM sequence set when no SRS information has to be transmitted in the common uplink burst symbol and where the narrowband SC-FDM sequence set comprises different sequences transmitted in the same frequency band, each of the different sequences associated with a different combination of SR and feedback information.
9. A method according to claim 1, characterized in that selecting the transmission waveform comprises: selecting the SC-FDM waveform when the information to be transmitted in the common uplink burst symbol comprises polling reference signal information, SRS, scheduling request information, SR, feedback information associated with a downlink transmission, or combinations thereof; and the method further comprising selecting the OFDM waveform when the information to be transmitted in the common uplink burst symbol comprises uplink data.
10. A method according to claim 9, characterized in that selecting the transmission waveform further comprises: selecting the SC-FDM waveform for a first subset of a frequency feature set of the common uplink burst symbol and selecting the OFDM waveform for a second subset of the frequency feature set of the common uplink burst symbol when the information to be transmitted comprises both uplink data and one or more of SRS information, SR information, or feedback information, wherein the frequency feature set comprises a plurality of frequency tones associated with a plurality of subcarriers used to transmit the common uplink burst symbol, and wherein the first subset of the frequency feature set and the second subset of the frequency feature set comprise alternating tones of the plurality of frequency tones.
11. Method according to claim 1, characterized in that the information to be transmitted in the common uplink burst symbol comprises uplink data, and in that selecting the transmission waveform comprises: selecting an orthogonal frequency division multiplexing (OFDM) waveform for at least a portion of the common uplink burst symbol.
12. Method (2300) for wireless communication, characterized in that it comprises: allocating (2305) common uplink burst symbol resources to a user equipment, UE, (115) for transmission of one or more types of information in a common uplink burst symbol in an independent wireless communication subframe; identifying (2310) a set of transmission waveforms available for transmission of the common uplink burst symbol, wherein the set of transmission waveforms comprises one of a single carrier frequency division multiplexing waveform, SC-FDM, an orthogonal frequency division multiplexing waveform, OFDM, or a mixed OFDM and SC-FDM transmission waveform, and each transmission waveform in the set of transmission waveforms is associated with one or more types of information to be transmitted in the common uplink burst symbol, and wherein when the SC-FDM transmission waveform is selected for transmission of the common uplink burst symbol uplink, the transmission comprises selecting a sequence (505) from a set of sequences (505, 510, 515, 520) based, at least in part, on the information to be transmitted in the common uplink burst symbol, the sequence (505) identifying the information, and wherein the different sequences from the set of sequences (505, 510, 515, 520) correspond to different cyclic deviations from a base sequence; receiving (2315) the common uplink burst symbol from the UE; determining (2320) the transmission waveform of the common uplink burst symbol and, when the SC-FDM transmission waveform is used, a cyclic deviation of a sequence in an SC-FDM waveform; and determine (2325) the information included in the common uplink burst symbol based, at least in part, on the determined transmission waveform and, when the SC-FDM transmission waveform is used, on the cyclical deviation of the SC-FDM waveform sequence of the common uplink burst symbol.
13. A method according to claim 12, characterized in that the information to be transmitted in the uplink common burst symbol comprises one or more of the following: polling reference signal information, SRS, scheduling request information, SR, or feedback information associated with a downlink transmission; and wherein the subset of SC-FDM waveforms comprises a first plurality of broadband SC-FDM sequences and a second plurality of narrowband SC-FDM sequences; and wherein the transmission waveform of the uplink common burst symbol is selected from the first plurality of broadband SC-FDM sequences when SRS information is transmitted in the uplink common burst symbol; and the transmission waveform of the uplink common burst symbol is selected from the second plurality of narrowband SC-FDM sequences when no SRS information is transmitted in the uplink common burst symbol. Determining the transmission waveform of the common uplink burst symbol comprises: determining a signal associated with each of a plurality of frequency tones received from the common uplink burst symbol; correlating the signal associated with each of the plurality of frequency tones with the set of transmission waveforms, wherein correlation comprises: applying an inverse discrete Fourier transform (IDFT) to the plurality of frequency tones of the received common uplink burst symbol to generate a time-domain sequence; and performing a plurality of cyclic shifts in the time-domain sequence, each of the plurality of cyclic shifts corresponding to a different transmission waveform from the set of transmission waveforms; and identifying the transmission waveform of the common uplink burst symbol based, at least in part, on the correlation.
14. Apparatus (1205) for wireless communication, characterized in that it comprises: means for identifying (1225) a common uplink burst symbol for transmitting one or more types of information in an independent wireless communication subframe; means for determining (1230) one or more types of information to be transmitted in the common uplink burst symbol; means for selecting (1235) one from a single carrier frequency division multiplexing transmission waveform, SC-FDM, an orthogonal frequency division multiplexing transmission waveform, OFDM, or a mixed OFDM and SC-FDM transmission waveform for transmission of the common uplink burst symbol based, at least in part, on one or more types of information to be transmitted in the common uplink burst symbol, wherein when the SC-FDM transmission waveform is selected for transmission of the common uplink burst symbol, the transmission comprises means for selecting (1235) a sequence (505) from a set of sequences (505, 510, 515, 520) based, at least in part, on the information to be transmitted in the common uplink burst symbol, the sequence (505) identifying the information, and wherein the sequences different from the set of sequences (505, 510, 515, 520) correspond to different cyclic deviations from a base sequence; means to transmit (1220) the common uplink burst symbol.
15. Wireless communication apparatus (1605), characterized in that it comprises: means for allocating (1625) common uplink burst symbol resources to a user equipment, UE, for transmission of one or more types of information in a common uplink burst symbol in an independent wireless communication subframe; means for identifying (1630) a set of transmission waveforms available for transmission of the common uplink burst symbol, wherein the set of transmission waveforms comprises one of a single carrier frequency division multiplexing waveform, SC-FDM, an orthogonal frequency division multiplexing waveform, OFDM, or a mixed OFDM and SC-FDM transmission waveform, and each transmission waveform in the set of transmission waveforms is associated with one or more types of information to be transmitted in the common uplink burst symbol, and wherein when the SC-FDM transmission waveform is selected for transmission of the common uplink burst symbol uplink, the transmission comprises selecting a sequence (505) from a set of sequences (505, 510, 515, 520) based, at least in part, on the information to be transmitted in the common uplink burst symbol, the sequence (505) identifying the information, and wherein the different sequences from the set of sequences (505, 510, 515, 520) correspond to different cyclic deviations from a base sequence; means for receiving (1610, 1635) the common uplink burst symbol from the UE; means for determining (1640) the transmission waveform of the common uplink burst symbol and, when the SC-FDM transmission waveform is used, a cyclic deviation of a sequence in an SC-FDM waveform; means to determine (1645) the information included in the common uplink burst symbol based, at least in part, on the determined transmission waveform and, when the SC-FDM transmission waveform is used, on the cyclical deviation of the SC-FDM waveform sequence of the common uplink burst symbol.

Description

CROSS-REFERENCES [0001] This Patent Application claims priority to U.S. Patent Application No. 15/674,325 by Wang et al., entitled “Uplink Common Burst Symbol Configuration”, filed August 10, 2017; and U.S. Provisional Patent Application No. 62/378,132 by Wang et al., entitled “Uplink Common Burst Symbol Configuration”, filed August 22, 2016; each of which is assigned to the assignee. INTRODUCTION [0002] The following generally refers to wireless communication, and more specifically to the common uplink burst symbol configuration. [0003] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcasting, and so on. These systems can be multiple access systems capable of supporting communication with multiple users sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, and orthogonal frequency division multiple access (OFDMA) systems. [0004] In some examples, a wireless multiple access communication system may include multiple base stations, each simultaneously supporting communication for multiple communication devices, otherwise known as user equipment (UEs). In a Long Term Evolution (LTE) or LTE-Advanced (LTE-A) network, a set of one or more base stations may define an eNodeB (eNB). In other examples (e.g., in a next-generation or 5G network), a wireless multiple access communication system may include multiple intelligent radio units (radio units (RHs)) communicating with multiple access node controllers (ANCs), where a set of one or more radio units, communicating with an ANC, defines an eNB. A base station or radio unit can communicate with a set of UEs on downlink (DL) channels (e.g., for transmissions from a base station or radio unit to a UE) and uplink (UL) channels (e.g., for transmissions from a UE to a base station or radio unit). [0005] Communication subframes between a network access device (e.g., an eNB, an ANC, an RH, or a base station) and a plurality of UEs may include different regions or channels that are assembled according to a time-division duplex (TDD) and/or frequency-division duplex (FDD) subframe structure. Subframes may additionally or alternatively include UL channel arrangements and/or DL channel arrangements. In subframes that include both DL and UL channels, processing timelines for uplink data determination and formatting may present challenges for some UEs. SUMMARY [0006] A wireless communication method is described. The method may include identifying a common uplink burst symbol in a wireless communication subframe, determining the information to be transmitted in the common uplink burst symbol, and selecting a transmission waveform for the common uplink burst symbol based at least in part on the information to be transmitted in the common uplink burst symbol. [0007] An apparatus for wireless communication is described. The apparatus may include means for identifying a common uplink burst symbol in a wireless communication subframe, means for determining information to be transmitted in the common uplink burst symbol, and means for selecting a transmission waveform for the common uplink burst symbol based at least in part on the information to be transmitted in the common uplink burst symbol. [0008] Another apparatus for wireless communication is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in memory. The instructions may be operable to cause the processor to identify a common uplink burst symbol in a wireless communication subframe, determine the information to be transmitted in the common uplink burst symbol, and select a transmission waveform for the common uplink burst symbol based at least in part on the information to be transmitted in the common uplink burst symbol. [0009] A non-transient computer-readable medium for wireless communication is described. The non-transient computer-readable medium may include operable instructions for causing a processor to identify a common uplink burst symbol in a wireless communication subframe, determine the information to be transmitted in the common uplink burst symbol, and select a transmission waveform for the common uplink burst symbol based at least in part on the information to be transmitted in the common uplink burst symbol. [0010] In some examples of the non-transient computer-readable method, apparatus, and medium described above, selecting the transmission waveform comprises selecting one or more of a single carrier frequency division multiplexing (SC-FDM) waveform or an orthogonal frequency division multiplexing (OFDM) waveform for the common uplink burst symbol based at least in part on the information to be transmitted in the common uplin