hash stringlengths 32 32 | doc_id stringlengths 7 13 | section stringlengths 3 121 | content stringlengths 0 2.2M |
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baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.2.2 UL-ULP Symbol rate | The symbol rate of the (G)MSK modulation in the UL-ULP mode shall be 2 380,371 sym/s (preferably derived from 26 MHz reference frequency). The tolerance of the symbol rate shall be kept within a range of ±0,1 % during one radio- burst. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.2.3 UL-ER Symbol rate | The symbol rate of the (G)MSK modulation in the UL-ER mode shall be 396,729 sym/s (preferably derived from 26 MHz reference frequency). The tolerance of the symbol rate shall be kept within a range of ±0,1 % during one radio- burst. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.3 Data Whitening | The complete PHY Payload (see Table 6-33 and Figure 6-12) shall be whitened using the PN9 sequence defined in IEEE 802.15.4 [1]. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.4 CRC | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.4.0 General | An 8-bit cyclic redundancy check (CRC) according to clause 6.4.6.2 shall be used. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.4.1 Payload CRC | The payload CRC shall be calculated over MPDU and MMODE field according to clause 6.4.6.2. In Case of zero padding the padded zeros shall be omitted for the CRC calculation. Figure 6-14: Calculation of Payload CRC |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.4.2 Header CRC | The additional Header CRC shall be calculated over Payload CRC and PSI according to clause 6.4.6.2. ETSI ETSI TS 103 357 V1.1.1 (2018-06) 61 Figure 6-15: Calculation of Header CRC |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.5 Forward Error Correction | A Forward Error Correction code (FEC) according to clause 6.4.6.3 shall be calculated over the complete PHY payload after data whitening. The FEC extends the original series of 186 - 826 uncoded bits to a series of 576 - 2 496 encoded bits. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.6 Interleaving | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.6.1 Introduction | After data whitening and FEC the FEC coded bit-stream of the PHY payload shall be distributed to sub-packets of the core and extension frame by the interleaver in a way, that the information of the PHR field (see clause 6.4.2.3) required to receive the extension frame are contained in the core frame. The length of the ... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.6.2 Bit assignment to sub-packets | The stream of cyclically shifted bits shall be indexed in ascending order with $ ∈{0, 1, 2 … ( −1)}, where $ = 0 represents the first bit. These bits shall be placed into the "# = + sub-packets. The sub-packet index ! ∈{0, 1, 2, … , ( −1)} gives the index of the sub-packet a symbol will be placed in after ... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.4.6.3 Bit placing within Burst Data Unit | Once all bits are assigned to a sub-packet, the bits shall be interleaved within a sub-packet and assigned to their position on the burst data unit. Bits with a lower index $ shall be mapped to symbols around the pilot sequence and bits with a higher index shall be mapped to symbols closer to the start and the end of t... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5 PHY Functions in DL | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.1 Modulation | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.1.1 DL-SB Mode | For the DL-SB Mode of the TS-UNB protocol a GFSK modulation with a symbol rate of 600 sym/s and modulation index h=1 (deviation 300 Hz) shall be used. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.1.2 DL-TS Mode | 6.4.5.1.2.1 Modulation Type If the DL-TS Mode of the TS-UNB protocol is used a MSK Modulation or GMSK Modulation with BT = 1,0 shall be used. 6.4.5.1.2.2 Symbol mapping The same symbol mapping as in uplink shall be used. 6.4.5.1.2.3 Symbol rate The symbol rate of the (G)MSK Modulation in the DL-TS Mode shall be 2 380,3... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.2 Data Whitening | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.2.1 Core frame | The complete PHY payload of DL-TS Core frame (see Table 6-39) shall be whitened using the PN9 sequence defined in IEEE 802.15.4 [1]. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.2.2 Extension frame | The PHY payload of DL-ER Extension frame block (see Table 6-42) shall be whitened using the PN9 sequence defined in IEEE 802.15.4 [1]. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.3 CRC | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.3.1 Core frame | A 4-bit CRC, according to clause 6.4.6.2, shall be used for the downlink core frame. The same CRC shall be used for DL-SB and DL-TS Mode. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.3.2 Extension frame | An 8-bit CRC, according to clause 6.4.6.2, shall be used for the downlink extension frame. The same CRC shall be used for DL-SB and DL-TS Mode. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.4 Forward Error Correction | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.4.1 DL-SB Mode | No forward error correction shall be used in DL-SB Mode. ETSI ETSI TS 103 357 V1.1.1 (2018-06) 64 |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.4.2 DL-TS Mode | 6.4.5.4.2.1 Core frame A forward error correction, calculated according to clause 6.4.6.3, shall be used to protect the PHY payload of the downlink core frame. The FEC shall be calculated over all bits of the core frame PHY payload after data whitening. After FEC the sequence of 78 bits results in 252 encoded bits. 6.4... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.5 Interleaving | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.5.1 DL-SB Mode | No interleaving is used in DL-SB Mode. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.5.5.2 DL-TS Mode | 6.4.5.5.2.1 Core frame The coded PHY payload shall be interleaved according to Table 6-44, whereas: • s = sub-packet index 0 … S-1 • m = symbol index in radio-burst • the numbers in the table represent the bit number of the PHY payload of the core frame ETSI ETSI TS 103 357 V1.1.1 (2018-06) 65 Table 6-44: DL-TS core fr... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.6 Commonly used PHY Functions | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.6.1 Introduction | There are common PHY functions which are used in different sections of the physical layer. They are described here to be referenced in the appropriate sections. ETSI ETSI TS 103 357 V1.1.1 (2018-06) 67 |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.6.2 CRC | All 2-bit CRCs shall be calculated with the following parameters: • 2 bit length (CRC-2) • Polynomial: 0x3 • Initial value: 0x3 • No XOR All 4-bit CRCs shall be calculated with the following parameters: • 4 bit length (CRC-4) • Polynomial: 0x3 • Initial value: 0xF • No XOR All 8-bit CRCs shall be calculated with the fo... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.6.3 FEC | All FECs shall be calculated with the following parameters: • Convolutional code • Rate: 1/3 • Polynomials (0155, 0123, 0137) (octal), (0x6D, 0x53, 0x5F)) (hex) • Constraint length: 7 • Zero-tailing |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.7 PHY Procedures | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.7.1 TSMA Schemes | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.7.1.1 Overview | In the TS-UNB protocol the application message is not transmitted in one radio-burst. The PPDU of the TS-UNB protocol in uplink and downlink DL-TS mode shall be split into several radio-bursts, which are distributed over time and frequency. The set of radio-bursts belonging to one message are called radio-frame. A radi... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.7.1.2 Frame Repetition | 6.4.7.1.2.1 Uplink repetition For performance improvement a radio frame may be repeated. The repeated radio frame rFRAME shall have the identical data format as the initial radio frame iFRAME. Both transmissions, iFRAME and rFRAME shall use the same TSMA pattern of the uplink TSMA pattern group UPG2 with a timeslot off... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.7.1.3 Downlink repetition | In downlink TS-Mode, only the core frame may be repeated. The downlink extension frame shall not be repeated. The repetition of the downlink core frame uses the second half of the downlink TSMA pattern. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.7.1.4 Radio burst time | The start time of the first radio-burst s=0 of a radio frame is randomly chosen by the end-point and defined as the middle of the pilot sequence of the radio-burst. The transmission time of a radio-burst (Radio-burst Time) ( ) is defined as the time difference between two radio-bursts from the middle of the pilot ... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.7.1.5 Frame time and frequency offset | A pseudorandom offset in frequency and time derived from the Header and Payload CRC shall be added to the selected TSMA pattern start frequency and start time according to Figure 6-21. Figure 6-21: Definition of frame start offset parameter The timeslot offset is only used for repetitions. The timeslot offset is give... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.7.1.6 Uplink TSMA Pattern | 6.4.7.1.6.1 Core Frame The following tables give the sets of radio-burst carrier and radio-burst time of the uplink TSMA pattern. Table 6-49: Radio-burst carrier set of Uplink TSMA Pattern Group 1 (UPG1) s p () 0 1 2 3 4 5 6 7 8 9 10 11 1 5 21 13 6 22 14 1 17 9 0 16 8 2 4 20 12 1 17 9 0 16 8 6 22 14 3 4 ... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.4.7.1.7 Downlink TSMA pattern | 6.4.7.1.7.1 DL-TS Mode In downlink a radio frame shall consist of 18 radio-bursts. Therefore TSMA pattern sets with 18 parameters according to the following tables shall be used. Table 6-56: Radio-burst carrier set of TSMA Pattern Group in downlink (DPG) s p () 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1 19 18 12 ... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.5 Radio Characteristics | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.5.1 Spectrum Use | The TS-UNB protocol may be configured to different spectrum requirements. It may be operated in different SRD sub bands in Europe by adjusting the carrier spacing of the TSMA pattern. When operated in a sub band with a bandwidth of at least 100 kHz the standard TSMA mode with a carrier spacing = 2 380,371 $ shall b... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.5.2 Channel access | The TS-UNB protocol may use random channel access without listen before talk. The relevant radio regulations on duty cycle limit the number of messages and data that can be transmitted. Table 6-59 gives the transmission times for different TS-UNB protocol modes. Table 6-59: Radio transmission times Radio Burst duration... |
baa46c383033a4406946797fe47211ae | 103 357 | 6.5.3 End-point | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.5.3.1 Carrier Frequency Tolerance | In the end-point symbol time and carrier frequency generation shall be derived from a common reference oscillator (preferable with a frequency of 26 MHz) with a tolerance below ±20 ppm. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.5.4 Base station | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.5.4.1 Carrier Frequency Tolerance | The base station RF frequency tolerance shall be better than ±5 ppm. |
baa46c383033a4406946797fe47211ae | 103 357 | 6.5.4.2 Receiver | |
baa46c383033a4406946797fe47211ae | 103 357 | 6.5.4.2.1 Receiver Bandwidth | The receiver bandwidth depends on the system mode of operation and shall be set accordingly. 7 Dynamic Downlink Ultra Narrow Band (DD-UNB) family |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1 System overview | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.1 System elements | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.1.1 Architecture | A LTN system running DD-UNB protocol comprises a Service Centre (SC), a number of Base Stations (BS), and many End-points (EP). Some EP may not be in the coverage area of a BS (referred to as Orphaned End-points or OEP). OEP can be connected to the network using a relay link through another EP (called Relay Point or RP... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.1.2 Service Centre | The present document describes a DD-UNB system with a single SC. It is possible to have multiple linked Service Centres to increase capacity for very large systems, but such an arrangement is implementation-specific and out of scope of the present document. ETSI ETSI TS 103 357 V1.1.1 (2018-06) 78 |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.1.3 Base station | A DD-UNB BS includes a transmitter and a receiver. The receiver typically has an analogue bandwidth greater than 15 kHz and digital signal processing (DSP) which can receive multiple concurrent DD-UNB signals on different frequencies within that bandwidth. The transmitter typically operates at higher power levels (500 ... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.1.4 End-points | An EP can receive a single DL transmission or transmit a single UL signal on a single frequency at any one time; this can be on the A or A"-interface. The A"-interface is used by an EP to communicate with a BS via another EP acting as a relay point (RP). The DD-UNB system is not designed to operate as a multi-hop mesh ... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.2 Protocol Overview | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.2.1 Introduction | The DD-UNB protocol is based on the OSI reference model. A typical implementation of DD-UNB is illustrated in Figure 7-1 (for downlink). Physical layer (PHY) and Medium Access Control (part of layer 2 - Data link layer (DLL)) are described in the present document. The remainder of DLL and higher layers are implementati... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.2.2 Protocol Termination Points | The present document specifies behaviour of PHY and MAC. A typical implementation of DD-UNB provides functionality at higher layers and this clause describes how protocols at those layers might be terminated to provide support for typical applications. ETSI ETSI TS 103 357 V1.1.1 (2018-06) 79 Figure 7-2 describes the A... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.2.3 System Addressing and Identities | Several address types are used by DD-UNB protocol to address different entities in each system: • A unique 10 bit Short System ID (SSID) is used to identify the system. • End-point ID (EPID) is a unique 32 bit BSGP allocated for each EP in the system. • Base Station ID (BSID) is a unique 13 bit identifier allocated for... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.3 Upper Layer Principles | DD-UNB provides the L1 / MAC mechanisms to support the implementation of a guaranteed delivery mechanism for streams of Data PDUs (or a definite indication of failure and, in this case, an indication of which blocks have been delivered). Acknowledge PDUs can be used by both L2 and L3 to provide acknowledgement, repetit... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.4 Layer 3 (NET) Overview | Layer 3 is implementation-dependent. In a DD-UNB implementation many connections are typically "semi-permanent": a connection is set up when an EP begins operation and not removed unless one or both ends of the connection cease operation. However this is not mandated. ETSI ETSI TS 103 357 V1.1.1 (2018-06) 81 |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.5 Layer 2 (DLL) Overview | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.5.1 Overview | DD-UNB Layer 1 is designed to support a range of Layer 2 implementations, but this specification details the MAC sub-layer employed in DD-UNB. DD-UNB Layer 2 is also designed to support message encryption and authentication of application messages, although other approaches to encryption may be implemented if required ... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.5.2 MAC Sublayer | Medium Access Control (MAC) is considered as a DLL sublayer. Medium access in the downlink and A" downlink is based upon the spectrum access rules including regulatory duty cycle limitation. However, in the Uplink and A" Uplink there is potential for multiple EP to transmit simultaneously, therefore MAC is employed to ... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.6 Layer 1 (PHY) Overview | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.6.1 Frequency use | A-interface Downlink and Uplink frequencies may or may not be the same; regulatory constraints suggest they will typically be different. Frequency planning may be employed to manage interference between cells. A"-interface Downlink and Uplink transmissions are intended for reception by EP (i.e. by OEP, and by EP config... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.6.2 A-interface Downlink and Uplink timing | The UL and DL physical layer operates using TDD with a frame of 60 timeslots, each of length 400 ms. A frame comprises Downlink, Uplink and Uplink Acknowledge subframes, as illustrated in Figure 7-7. The allocation of timeslots to these subframes is variable and is broadcast by the BS for each frame. For relay operatio... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.6.3 A"-Interface (Relay Operation) timing | An EP which cannot successfully receive a base station is called an Orphan EP (OEP). An OEP may communicate with a BS via a Relay EP (RP) if the radio path permits; EP to RP communication uses the A"-interface. In normal circumstances OEP are avoided by careful deployment planning, however relay operation provides an o... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.1.6.4 Frequency and Time Synchronization | An EP typically has a low-stability frequency reference. It establishes and maintains frequency and time synchronization by receiving and decoding transmissions from a BS. |
baa46c383033a4406946797fe47211ae | 103 357 | 7.2 Network Layer | The DD-UNB Layer 3 is implementation-dependent. |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3 Data Link Layer | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.1 DLL introduction | The DD-UNB DLL is implementation-dependent and a range of DLL implementations can be used to take advantage of the features supported by the DD-UNB PHY, in particular the logical channels provided. However MAC sub-layer functionality is closely related to the PHY constraints of UNB (and DD-UNB specifics) and shall be i... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2 MAC sub-layer | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.1 MAC on A-interface UL - Data Subframe | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.1.1 General | The A-interface UL protocol MAC procedure is based on the "Aloha" approach randomized in both time (slotted Aloha) and frequency. The MAC procedure randomizes the timing of the transmission of data-bursts subject to avoiding unnecessary delays in sending data and subject to constraints arising from selected frame forma... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.1.2 UL throttle | The BS shall transmit (as part of its broadcast channel, see Table 7-7) a number between 0 and 7 related to the degree of overall uplink congestion it is experiencing. This number is called "uplink throttle value". If the uplink throttle value is not zero, then independently for each current or attempted connection (i.... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.1.3 Time domain | The random selection of timing of UL transmissions is strongly influenced by current physical layer configuration (including frame format) and constraints on the handling of data-bursts to be transmitted. ETSI ETSI TS 103 357 V1.1.1 (2018-06) 84 A number of UL transmission time windows are available to an EP in the UL ... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.1.4 Frequency domain | If an EP has one or more data-bursts to send during the UL subframe, MAC shall select, at random and independently for each data-burst, a UL sub-channel on which to transmit the data-burst (a value FMAC is provided to PHY, see clause 7.3.2.2.3); an exception is described in clause 7.4.3.3.3 for strongly-coded PDUs. |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.2 MAC on A-interface UL - Ack Subframe | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.2.1 General | The A-interface UL protocol MAC procedure is based on the "Aloha" approach randomized in both time (slotted Aloha) and frequency. |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.2.2 Time domain | The random selection of timing of UL transmissions is strongly influenced by current physical layer configuration (including frame format) and constraints on the handling of data-bursts to be transmitted. A number of UL transmission time windows are available to an EP in the UL Ack subframe, each is of 4 timeslots dura... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.2.3 Frequency domain | If an EP has one or more data-bursts to send during the UL Ack subframe, MAC shall select, at random and independently for each data-burst, a UL sub-channel on which to transmit the data-burst (a value FMAC is provided to PHY, see clause 7.3.2). |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.3 MAC on A"-interface UL | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.3.1 General | The DD-UNB A" UL supports randomization in the time domain but not the frequency domain. In the A"-interface DL for each frame, an RP shall indicate to attached OEP (see clause 7.4.2.3) that the current A"-interface subframe is either "open" or "closed": • In an open A"-interface subframe any attached OEP may transmit.... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.2.3.2 Time domain | The MAC in an open A" UL subframe is based on slotted Aloha principles in the time domain. A number of timeslots are available to an OEP in the UL A" subframe (Table 7-3). Transmission of an A" UL data- burst shall start at the beginning of a timeslot, the timeslot shall be chosen randomly from those which permit compl... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.3.3 Encryption and Authentication | DD-UNB supports UL and DL encryption of application messages on the A and A"-interfaces. Encryption is applied between SC and EP (or OEP). Each EP shall be pre-provisioned with a pair of randomly-selected secret 256-bit keys (one for each of UL and DL), the mechanism for this is implementation-dependent; the keys shall... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4 Physical Layer | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.1 PHY Format | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.1.1 Timing and Frame Formats | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.1.1.1 Introduction | The A-interface and A"-interface PHY use Time Domain Duplex (TDD). The basic element in the time structure of the DD-UNB system is the timeslot, which has a fixed length of 0,4 seconds. A frame comprises 60 timeslots numbered from timeslot number 0. A superframe comprises 64 frames numbered from frame 0. ETSI ETSI TS 1... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.1.1.2 A-interface Frame Formats | There are 8 frame formats defined for the A-interface of a DD-UNB system, the number of timeslots in each subframe are shown in Table 7-2; the timeslots are allocated to subframes within the frame in the order shown. The choice of A-interface frame format shall be made by the BS on a per-frame basis and should take int... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.1.1.3 A"-interface Subframe Formats | There are 5 frame formats defined for the A"-interface of a DD-UNB system, the number of timeslots in each subframe is shown in Table 7-3; timeslots are allocated to subframes within the A"-interface subframe in the order shown. The choice of A"-interface format shall be made by the RP on a per-frame basis and should t... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.1.1.4 Synchronization and Frame Offset | BS in a DD-UNB system may be synchronized to a common timing of timeslot 0 of frame 0 (i.e. start of a superframe) with a maximum error of ±8 ms; such synchronization allows management of inter-BS interference. The method of maintaining synchronization is implementation-dependent. As described in Table 7-2, the DD-UNB ... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.1.1.5 Battery saving | 7.4.1.1.5.1 Battery saving in DD-UNB DD-UNB supports three classes of EP operation. Class(es) supported by a specific EP are implementation-dependent as below. In battery-save mode an EP/RP does not support air-interface activity; it shall exit battery-save mode in time to operate as described below. Further battery-sa... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.1.2 Physical Channels | For the Downlink and A" downlink, each logical channel transferring data from higher layers corresponds to a physical channel, with three additional physical channels: the Sync Physical Channel, the Broadcast Physical Channel and the Wakeup Physical Channel. For the Uplink, two of the logical channels (the Uplink DLL C... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.2 L1 PDUs and SDUs | |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.2.1 Overview | Figure 7-10 shows how information is passed to/from Physical layer (downlink example), using L1 PDUs and SDUs. ETSI ETSI TS 103 357 V1.1.1 (2018-06) 90 Figure 7-10: PHY PDUs and SDUs (Downlink) L1 PDUs and SDUs shall be constructed as described below. |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.2.2 Sync PDU | Sync PDU is created at L1 and is formed by combining an uncoded Sync Header with a Sync Codeword (i.e. SC codeword, see Table 7-26 and Table 7-28) which is the result of BCH coding of Sync pre-coding block. Sync Header is defined as follows: Table 7-4: Sync Header Type Preamble Sequence Sync Word Downlink / A" Downlink... |
baa46c383033a4406946797fe47211ae | 103 357 | 7.4.2.3 Broadcast PDU | Broadcast PDU contains information describing the structure of the DL data-burst. The Broadcast PDU has different formats for the downlink and A" downlink. The Broadcast PDU is a broadcast codeword of length 175 bits. For the A-interface downlink, the Broadcast pre-coding block has length 51 bits, see Table 7-7. Table ... |
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