When Wi-Fi works without an access point: all modes and their features

The traditional Wi-Fi network organization scheme assumes the presence of access points (a router or module in AP mode) that manages traffic, assigns IP addresses, and facilitates communication between devices. However, there are wireless network operating modes that don't require an access point—devices connect directly or via alternative protocols. Such solutions are suitable for temporary networks, file sharing between devices, field communications, or when infrastructure is unavailable.

In this article, we will analyze all possible scenarios where Wi-Fi functions without a classic router: from outdated, but still supported standards like Ad-Hoc, to modern technologies such as Wi-Fi Direct And Mesh networksWe'll focus on practical aspects—how to set up a connection, what limitations exist, and when such solutions are justified.

It's important to understand that avoiding a hotspot always comes with tradeoffs: reduced speed, a limited number of connected devices, compatibility issues, or no internet access. But in some situations—for example, transferring files between laptops or hosting a local game—these modes become indispensable.

1. Ad-Hoc Mode: Outdated, but Still Alive

Ad-Hoc (from Latin "for this case") is the very first standard for organizing Wi-Fi networks without a central node, which appeared in the original specification IEEE 802.11In this mode, devices are connected directly, forming unstructured network (IBSS — Independent Basic Service Set). Each network participant is simultaneously both a client and an access point for other devices.

The main advantage of Ad-Hoc is the ease of setup: it is enough for both devices to support this mode and be configured to the same SSID, channel, and encryption type. However, the technology has many drawbacks:

• 🐢 Low speed: Due to the lack of coordination, packets often collide, reducing throughput to 50-70% of the theoretical maximum.
• 🔒 Security issues: Most devices in Ad-Hoc support only WEP or WPA2-PSK, but not modern protocols like WPA3.
• 📱 Limited compatibility: smartphones on Android 10+ And iOS most often they do not know how to connect to Ad-Hoc networks "out of the box".

In practice, Ad-Hoc is used today only to connect specialized equipment (for example, some models FPV glasses For drones) or in laboratory settings. For routine tasks, it has been replaced by more modern protocols.

⚠️ Attention: IN Windows 10/11 creating an Ad-Hoc network is only possible via the command line (netsh wlan set hostednetwork mode=allow ssid=MyAdHoc key=password123). The graphical interface for this mode has been removed since Windows 8.1.

2. Wi-Fi Direct: A modern alternative for gadgets

Wi-Fi Direct - this is a standard developed Wi-Fi Alliance in 2010 as a replacement for Ad-Hoc. Its key difference is automatic connection setup and support for modern security protocols (WPA2-PSK And WPA3). Devices in Wi-Fi Direct can play a role group owner (GO — Group Owner), who temporarily takes over the functions of the access point, or client.

Advantages of Wi-Fi Direct:

• ⚡ High speed: up to 250 Mbps (standard) 802.11ac), which is comparable to regular Wi-Fi.
• 🔄 Automatic role switching: If the "group owner" disconnects, another device can take over its functions.
• 📲 Wide range of devices: supported by all smartphones, printers, cameras and even some IoT gadgets.

Typical use cases:

• 🖨️ Print documents from your phone to a printer without a router.
• 🎮 Multiplayer games on consoles (Nintendo Switch, PS5 in local mode).
• 📁 Fast file transfer between smartphones (alternative Bluetooth or NFC).

To activate Wi-Fi Direct on Android, go to Settings → Wi-Fi → Wi-Fi Direct (the path may differ depending on the firmware). iOS technology is integrated into the function AirDrop, but connecting to other types of devices (such as printers) may require special software.

Enable Wi-Fi in Settings

Open the Wi-Fi Direct section

Select the target device from the list

Confirm the connection on both devices

Check the connection in Wi-Fi status-->

⚠️ Attention: Some manufacturers (eg Samsung) restrict Wi-Fi Direct to devices within their ecosystem. Cross-platform connectivity may require manual IP address configuration.

3. SoftAP: When a laptop or smartphone becomes a router

Mode SoftAP (Software Access Point) technically implies the presence of an access point, but it is created programmatically on one of the connected devices—for example, a laptop or smartphone. It's not pure wireless mode without an AP, but is often considered an alternative to a traditional router. The main difference from Ad-Hoc is that SoftAP emulates a full-fledged access point with all the necessary features (DHCP, NAT, encryption).

Where SoftAP is used:

• 💻 Sharing the Internet from a laptop (if it is connected to the network via cable or 4G modem).
• 📱 Organizing a hot spot (hotspot) on your smartphone to connect other devices.
• 🛠️ Network diagnostics: checking the connection of client devices without a physical router.

Setting up SoftAP on Windows:

1. Open Settings → Network & Internet → Mobile Hotspot.
2. Select an internet source (eg. Ethernet or Local Area Network Connection).
3. Set the network name (SSID) and password (minimum 8 characters).
4. Activate the option Allow use of my internet connection.

On Linux To create SoftAP, a utility is used hostapd:

sudo hostapd -dd /etc/hostapd/hostapd.conf

Where in the file hostapd.conf the following parameters must be specified:

interface=wlan0
driver=nl80211
ssid=MySoftAP
hw_mode=g
channel=6
wpa=2
wpa_passphrase=securepassword123

4. Mesh networks (802.11s): decentralized Wi-Fi

Standard IEEE 802.11s defines Mesh networks (mesh networks), where each device can relay signals from other nodes, forming a self-organizing structure without a central access point. This approach is used in:

• 🏙️ City networks (municipal Wi-Fi), where the nodes are installed on lamp posts.
• 🚢 Marine and field conditions where infrastructure is absent.
• 🏠 Systems smart home (For example, Google Nest Wi-Fi or TP-Link Deco), where several modules form a single network.

Key features of Mesh:

• 🔄 Self-healing: If one node fails, traffic is automatically rerouted through others.
• 📶 Expanded coverage: the signal "jumps" between nodes, covering large areas.
• ⚙️ Difficulty of setup: requires compatible hardware and often proprietary software.

For setting up a mesh network at home, ready-made solutions are suitable:

• 📦 TP-Link Deco M5 — a budget set of 3 modules.
• 📦 Netgear Orbi — a high-performance system with a dedicated channel for communication between nodes.
• 📦 Ubiquiti AmpliFi — solutions for professionals with flexible settings.

Self-configuring Mesh based on open source software (e.g. OpenWrt with a package 802.11s) is possible, but requires in-depth knowledge. Minimum requirements:

• Adapters with support 802.11s (For example, Atheros AR9280).
• Firmware with kernel not lower 4.19.
• Utilities wpad-mesh And batman-adv for routing.

⚠️ Attention: In open source mesh networks (OpenWrt, LEDE) unstable operation may be observed when the number of nodes is more than 8. For scaling, configuration of the routing protocol is required (BMX6 or OLSR).

How is Mesh different from repeaters?

In repeaters, traffic passes through a central router, creating a bottleneck. In a mesh network, each node can exchange data directly with its neighbors, optimizing the route. Furthermore, a mesh network supports roaming—a seamless transition between nodes without interrupting the connection (as in cellular networks).

5. P2P networks over Wi-Fi: data exchange without the Internet

Technologies peer-to-peer (P2P) Allow devices to exchange data directly, bypassing not only an access point but also centralized servers. In the context of Wi-Fi, this is accomplished through:

• 🔗 Wi-Fi P2P (Wi-Fi Direct extension for device groups).
• 🌐 Local chats (apps like Bridgefy or FireChat).
• 🎮 Local multiplayer (games through LAN via Wi-Fi).

An example of setting up a P2P connection between two laptops on Linux:

1. Install the package wpa_supplicant with P2P support:

   sudo apt install wpasupplicant

2. Launch discovery:

   sudo wpa_cli -i wlan0 p2p_find

3. Connect to the found device:

   sudo wpa_cli -i wlan0 p2p_connect [MAC address] pbc go_intent=15

P2P limitations:

• 📡 Range of action: does not exceed 50-100 meters (depending on the adapter).
• 🔋 Energy consumption: constant exchange of packets drains the battery of smartphones in 2-3 hours.
• 🛡️ Security: in open networks, data can be intercepted (it is recommended to use VPN over P2P).

Popular Wi-Fi P2P apps:

6. Specialized protocols: from LoRa to Thread

In addition to standard Wi-Fi modes, there are alternative protocols that allow you to set up networks without a traditional access point. While not considered Wi-Fi in the classic sense, they solve similar problems:

Thread (based on IEEE 802.15.4):

• 🏠 Used in systems smart home (Google Nest, Apple HomeKit).
• 🔄 Supports self-organizing mesh topology.
• ⚡ Consumes minimal energy (suitable for battery-powered devices).

LoRaWAN:

• 📡 Works on frequencies 868 MHz (Europe) or 915 MHz (USA), does not require licensing.
• 🌍 Communication range: up to 10 km in line of sight.
• 🐢 Data transfer speed: from 0.3 to 50 kbps.

Zigbee:

• 🕸️ Uses a mesh topology with support for up to 65,000 devices in a single network.
• 🔋 Energy efficiency: devices can operate on batteries for years.
• 🔒 Supports encryption AES-128.

These protocols are not compatible with Wi-Fi, but they solve the problem of organizing networks without a central node. For example, Thread can be used for communication between smart home sensors, and LoRaWAN — for monitoring remote objects (warehouses, farms).

⚠️ Attention: Devices on Zigbee or Thread cannot communicate directly with Wi-Fi devices. A gateway (e.g., Home Assistant or Samsung SmartThings).

Comparison chart of Wi-Fi modes without an access point

FAQ: Frequently asked questions about Wi-Fi without a hotspot

Is it possible to connect to the Internet via Wi-Fi Direct?

Yes, but only if one of the devices on the Wi-Fi Direct network has internet access (e.g. a smartphone with mobile data) and is configured as group owner (GO)In this case, it can distribute the Internet to other devices on the network, but the speed will be limited by the mobile network's bandwidth.

Why can't my smartphone see the Ad-Hoc network from my laptop?

Modern smartphones (Android 10+, iOS) do not support connection to Ad-Hoc networks at the driver level. Solutions:

• Use Wi-Fi Direct or SoftAP instead of Ad-Hoc.
• On Android With root rights you can install a patch for the Wi-Fi driver (for example, for chips Broadcom).
• For iOS There are no alternatives - only Wi-Fi Direct via AirDrop.

How to increase the communication range in a mesh network?

To expand the coverage of your Mesh network:

• Add additional nodes (the optimal distance between them is 10-15 meters).
• Use adapters with external antennas (eg. TP-Link TL-WN722N).
• Set up a channel with minimal interference (use utilities like Wi-Fi Analyzer).
• For street networks, choose equipment with support 802.11ah (range 900 MHz), which passes through obstacles better.

In urban areas, the effective range of a Mesh network rarely exceeds 200-300 meters due to interference from other networks.

Can I use Wi-Fi Direct to stream video?

Technically yes, but with some caveats:

• Maximum resolution for stable streaming - 720p (at a speed of ~10 Mbps).
• 1080p possible only under ideal conditions (close distance, no interference).
• Latency can reach 200-500 ms, which is critical for games or video calls.

For streaming it is better to use SoftAP with an Internet connection or a local network via a router.

Which devices support 802.11s (Mesh) without additional software?

Ready-made solutions with support 802.11s out of the box:

• Routers: TP-Link Deco, Netgear Orbi, ASUS ZenWiFi.
• Modules for Raspberry Pi: GL.iNet (with firmware) OpenWrt).
• Industrial equipment: Ubiquiti UniFi, MikroTik (with setting 802.11s in manual mode).

Support for PCs and laptops 802.11s implemented only in Linux (kernel 4.19+) with drivers ath9k or mt76.